TY - JOUR A1 - Krause, Gregor A1 - Fruth, B. T1 - Dielectric Properties of Polyolefins Stressed by High Electrical Fields / Fruth, B. ; Krause, G. JF - Plenary lectures and contributions presented at the International Symposium on Polymer Materials : held in San Sebastian (Donostia), Spain, 31 August - 4 September, 1987 / symposium ed. G. M. Guzmán ; A. Santamaria Y1 - 1988 SN - 3-85739-220-7 N1 - International Symposium on Polymer Materials <1987, San Sebastián, Golfo de Vizcaya> PB - Huethig & Wepf CY - Basel ER - TY - JOUR A1 - Krause, Gregor A1 - Forsyth, Paul A. A1 - Peter, Till T1 - Robuste Filter in der Energieversorgung / Paul A. Forsyth, Gregor Krause, Till Peter JF - ETZ. 114 (1993), H. 22 Y1 - 1993 N1 - Printausgabe: Aachen Eupener Str.: 23 Z 133; Jülich: 63 ZS 035 SP - 1382 EP - 1385 ER - TY - JOUR A1 - Krause, Gregor T1 - High Field Phenomena of Polymeric Insulation Investigated at PE Needle-Plane Specimen JF - Seventh International Symposium on High Voltage Engineering : Dresden, August 26 - 30, 1991 / Technische Universität Dresden Y1 - 1991 N1 - International Symposium on High Voltage Engineering ; (7, 1991, Dresden); International Symposium on High Voltage Engineering (ISH) ; (7 : ; 1991.08.26-30 : ; Dresden) PB - TU Dresden CY - Dresden ER - TY - JOUR A1 - Krause, Gregor T1 - Verhandeln statt Energiesparen? Über den Umgang mit Preisnachlässen im Energiebereich JF - extrACT: Das Magazin der Fachhochschule Aachen (2001) Y1 - 2001 SP - 22 EP - 23 ER - TY - JOUR A1 - Kraff, Oliver A1 - Wrede, Karsten H. A1 - Schoemberg, Tobias A1 - Dammann, Philipp A1 - Noureddine, Yacine A1 - Orzada, Stephan A1 - Ladd, Mark E. A1 - Bitz, Andreas T1 - MR safety assessment of potential RF heating from cranial fixation plates at 7 T JF - Medical Physics Y1 - 2013 U6 - https://doi.org/10.1118/1.4795347 SN - 2473-4209 VL - 40 IS - 4 SP - 042302-1 EP - 042302-10 PB - Wiley CY - Hoboken ER - TY - JOUR A1 - Kraff, Oliver A1 - Bitz, Andreas A1 - Kruszona, Stefan A1 - Orzada, Stephan A1 - Schaefer, Lena C. A1 - Theysohn, Jens M. A1 - Maderwald, Stefan A1 - Ladd, Mark E. A1 - Quick, Harald H. T1 - An eight-channel phased array RF coil for spine MR imaging at 7 T JF - Investigative Radiology Y1 - 2009 U6 - https://doi.org/10.1097/RLI.0b013e3181b24ab7 SN - 1536-0210 VL - 44 IS - 11 SP - 734 EP - 740 PB - Lippincott Williams & Wilkins ER - TY - JOUR A1 - Kraff, Oliver A1 - Bitz, Andreas A1 - Dammann, Philipp A1 - Ladd, Susanne C. A1 - Ladd, Mark E. A1 - Quick, Harald H. T1 - An eight-channel transmit/receive multipurpose coil for musculoskeletal MR imaging at 7 T JF - Medical Physics N2 - Purpose: MRI plays a leading diagnostic role in assessing the musculoskeletal (MSK) system and is well established for most questions at clinically used field strengths (up to 3 T). However, there are still limitations in imaging early stages of cartilage degeneration, very fine tendons and ligaments, or in locating nerve lesions, for example. 7 T MRI of the knee has already received increasing attention in the current published literature, but there is a strong need to develop new radiofrequency (RF) coils to assess more regions of the MSK system. In this work, an eight-channel transmit/receive RF array was built as a multipurpose coil for imaging some of the thus far neglected regions. An extensive coil characterization protocol and first in vivo results of the human wrist, shoulder, elbow, knee, and ankle imaged at 7 T will be presented. Methods: Eight surface loop coils with a dimension ofurn:x-wiley:00942405:media:mp7176:mp7176-math-0001 were machined from FR4 circuit board material. To facilitate easy positioning, two coil clusters, each with four loop elements, were combined to one RF transmit/receive array. An overlapped and shifted arrangement of the coil elements was chosen to reduce the mutual inductance between neighboring coils. A phantom made of body-simulating liquid was used for tuning and matching on the bench. Afterward, the S-parameters were verified on a human wrist, elbow, and shoulder. For safety validation, a detailed compliance test was performed including full wave simulations of the RF field distribution and the corresponding specific absorption rate (SAR) for all joints. In vivo images of four volunteers were assessed with gradient echo and spin echo sequences modified to obtain optimal image contrast, full anatomic coverage, and the highest spatial resolution within a reasonable acquisition time. The performance of the RF coil was additionally evaluated by in vivo B1 mapping. Results: A comparison of B1 per unit power, flip angle distribution, and anatomic images showed a fairly homogeneous excitation for the smaller joints (elbow, wrist, and ankle), while for the larger joints, the shoulder and especially the knee, B1 inhomogeneities and limited penetration depth were more pronounced. However, the greater part of the shoulder joint could be imaged.In vivo images rendered very fine anatomic details such as fascicles of the median nerve and the branching of the nerve bundles. High-resolution images of cartilage, labrum, and tendons could be acquired. Additionally, turbo spin echo (TSE) and inversion recovery sequences performed very well. Conclusions: This study demonstrates that the concept of two four-channel transmit/receive RF arrays can be used as a multipurpose coil for high-resolutionin vivo MR imaging of the musculoskeletal system at 7 T. Not only gradient echo but also typical clinical and SAR-intensive sequences such as STIR and TSE performed well. Imaging of small structures and peripheral nerves could in particular benefit from this technique. Y1 - 2010 U6 - https://doi.org/10.1118/1.3517176 SN - 2473-4209 VL - 37 IS - 12 SP - 6368 EP - 6376 PB - Wiley CY - Hoboken, NJ ER - TY - JOUR A1 - Kraff, Oliver A1 - Bitz, Andreas A1 - Breyer, Tobias A1 - Kruszona, Stefan A1 - Maderwald, Stefan A1 - Brote, Irina A1 - Gizewski, Elke R. A1 - Ladd, Mark E. A1 - Quick, Harald H. T1 - A transmit/receive radiofrequency array for imaging the carotid arteries at 7 Tesla: coil design and first in vivo results JF - Investigative Radiology N2 - Objective: To develop a transmit/receive radiofrequency (RF) array for magnetic resonance imaging (MRI) of the carotid arteries at 7 T. The prototype is characterized in numerical simulations and bench measurements, and the feasibility of plaque imaging at 7 T is demonstrated in first in vivo images. Materials and Methods: The RF phased array coil consists of 8 surface loop coils. To allow imaging of both sides of the neck, the RF array is divided into 2 coil clusters, each with 4 overlapping loop elements. For safety validation, numerical computations of the RF field distribution and the corresponding specific absorption rate were performed on the basis of a heterogeneous human body model. To validate the coil model, maps of the transmit B1+ field were compared between simulation and measurement. In vivo images of a healthy volunteer and a patient (ulcerating plaque and a 50% stenosis of the right internal carotid artery) were acquired using a 3-dimensional FLASH sequence with a high isotropic spatial resolution of 0.54 mm as well as using pulse-triggered proton density (PD)/T2-weighted turbo spin echo sequences. Results: Measurements of the S-parameters yielded a reflection and isolation of the coil elements of better than −18 and −13 dB, respectively. Measurements of the g-factor indicated good image quality for parallel imaging acceleration factors up to 2.4. A similar distribution and a very good match of the absolute values were found between the measured and simulated B1+ transmit RF field for the validation of the coil model. In vivo images revealed good signal excitation of both sides of the neck and a high vessel-to-background image contrast for the noncontrast-enhanced 3-dimensional FLASH sequence. Imaging at 7 T could depict the extent of stenosis, and revealed the disruption and ulcer of the plaque. Conclusions: This study demonstrates that 2 four-channel transmit/receive RF arrays for each side of the neck is a suitable concept for in vivo MRI of the carotid arteries at 7 Tesla. Further studies are needed to explore and exploit the full potential of 7 T high-field MRI for carotid atherosclerotic plaque imaging. Y1 - 2011 U6 - https://doi.org/10.1097/RLI.0b013e318206cee4 SN - 1536-0210 VL - 46 IS - 4 SP - 246 EP - 254 PB - Wolters Kluwer CY - Köln ER - TY - JOUR A1 - Kowalewski, Paul A1 - Bragard, Michael A1 - Hüning, Felix A1 - De Doncker, Rik W. T1 - An inexpensive Wiegand-sensor-based rotary encoder without rotating magnets for use in electrical drives JF - IEEE Transactions on Instrumentation and Measurement N2 - This paper introduces an inexpensive Wiegand-sensor-based rotary encoder that avoids rotating magnets and is suitable for electrical-drive applications. So far, Wiegand-sensor-based encoders usually include a magnetic pole wheel with rotating permanent magnets. These encoders combine the disadvantages of an increased magnet demand and a limited maximal speed due to the centripetal force acting on the rotating magnets. The proposed approach reduces the total demand of permanent magnets drastically. Moreover, the rotating part is manufacturable from a single piece of steel, which makes it very robust and cheap. This work presents the theoretical operating principle of the proposed approach and validates its benefits on a hardware prototype. The presented proof-of-concept prototype achieves a mechanical resolution of 4.5 ° by using only 4 permanent magnets, 2Wiegand sensors and a rotating steel gear wheel with 20 teeth. KW - Rotary encoder KW - Wiegand sensor Y1 - 2023 U6 - https://doi.org/10.1109/TIM.2023.3326166 SN - 0018-9456 (Print) SN - 1557-9662 (Online) VL - 72 SP - 10 Seiten PB - IEEE CY - New York ER - TY - JOUR A1 - Kobus, Thiele A1 - Bitz, Andreas A1 - Uden, Mark J. van A1 - Lagemaat, Miram W. A1 - Rothgang, Eva A1 - Orzada, Stephan A1 - Heerschap, Arend A1 - Scheenen, Tom W. J. T1 - In vivo 31P MR spectroscopic imaging of the human prostate at 7 T: safety and feasibility JF - Magnetic Resonance in Medicine N2 - 31P MR spectroscopic imaging of the human prostate provides information about phosphorylated metabolites that could be used for prostate cancer characterization. The sensitivity of a magnetic field strength of 7 T might enable 3D 31P MR spectroscopic imaging with relevant spatial resolution in a clinically acceptable measurement time. To this end, a 31P endorectal coil was developed and combined with an eight-channel 1H body-array coil to relate metabolic information to anatomical location. An extensive safety validation was performed to evaluate the specific absorption rate, the radiofrequency field distribution, and the temperature distribution of both coils. This validation consisted of detailed Finite Integration Technique simulations, confirmed by MR thermometry and Burn:x-wiley:07403194:media:MRM24175:tex2gif-stack-1 measurements in a phantom and in vivo temperature measurements. The safety studies demonstrated that the presence of the 31P endorectal coil had no influence on the specific absorption rate levels and temperature distribution of the external eight-channel 1H array coil. To stay within a 10 g averaged local specific absorption rate of 10 W/kg, a maximum time-averaged input power of 33 W for the 1H array coil was allowed. For transmitting with the 31P endorectal coil, our safety limit of less than 1°C temperature increase in vivo during a 15-min MR spectroscopic imaging experiment was reached at a time-averaged input power of 1.9 W. With this power setting, a second in vivo measurement was performed on a healthy volunteer. Using adiabatic excitation, 3D 31P MR spectroscopic imaging produced spectra from the entire prostate in 18 min with a spatial resolution of 4 cm3. The spectral resolution enabled the separate detection of phosphocholine, phosphoethanolamine, inorganic phosphate, and other metabolites that could play an important role in the characterization of prostate cancer. Y1 - 2012 U6 - https://doi.org/10.1002/mrm.24175 SN - 1522-2594 VL - 68 IS - 6 SP - 1683 EP - 1695 PB - Wiley-Liss CY - New York ER - TY - JOUR A1 - Kob, Malte A1 - Frauenrath, Tobias T1 - A system for parallel measurement of glottis opening and larynx position JF - Biomedical Signal Processing and Control N2 - The simultaneous assessment of glottal dynamics and larynx position can be beneficial for the diagnosis of disordered voice or speech production and swallowing. Up to now, methods either concentrate on assessment of the glottis opening using optical, acoustical or electrical (electroglottography, EGG) methods, or on visualisation of the larynx position using ultrasound, computer tomography or magnetic resonance imaging techniques. The method presented here makes use of a time-multiplex measurement approach of space-resolved transfer impedances through the larynx. The fast sequence of measurements allows a quasi simultaneous assessment of both larynx position and EGG signal using up to 32 transmit–receive signal paths. The system assesses the dynamic opening status of the glottis as well as the vertical and back/forward motion of the larynx. Two electrode-arrays are used for the measurement of the electrical transfer impedance through the neck in different directions. From the acquired data the global and individual conductivity is calculated as well as a 2D point spatial representation of the minimum impedance. The position information is shown together with classical EGG signals allowing a synchronous visual assessment of glottal area and larynx position. A first application to singing voice analysis is presented that indicate a high potential of the method for use as a non-invasive tool in the diagnosis of voice, speech, and swallowing disorders. KW - EGG KW - Transfer impedance KW - Tomography KW - Larynx position KW - Voice assessment Y1 - 2009 U6 - https://doi.org/10.1016/j.bspc.2009.03.004 SN - 1746-8108 VL - 4 IS - 3 SP - 221 EP - 228 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Klomp, D. W. J. A1 - Bitz, Andreas A1 - Heerschap, A. A1 - Scheenen, T. W. J. T1 - Proton spectroscopic imaging of the human prostate at 7 T JF - NMR in Biomedicine Y1 - 2009 U6 - https://doi.org/10.1002/nbm.1360 SN - 1099-1492 VL - 22 IS - 5 SP - 495 EP - 501 ER - TY - JOUR A1 - Klinge, Uwe A1 - Wilke, Ralf A1 - Mühl, Thomas T1 - Auswahl der Herniennetze nach der “effektiven Porosität” - warum das Gewicht weniger wichtig ist JF - Chirurgische Allgemeine : CHAZ ; Zeitung für Klinik und Praxis Y1 - 2012 SN - 1615-5378 VL - 13 IS - 12 SP - 297 EP - 301 PB - Kaden CY - Mannheim ER - TY - JOUR A1 - Klinge, Uwe A1 - Otto, Jens A1 - Mühl, Thomas T1 - High Structural Stability of Textile Implants Prevents Pore Collapse and Preserves Effective Porosity at Strain JF - BioMed Research International Y1 - 2015 U6 - https://doi.org/10.1155/2015/953209 SN - 2314-6133 (Print) SN - 2314-6141 (Online) N1 - Article ID: 953209 VL - 2015 ER - TY - JOUR A1 - Jens, Otto A1 - Kaldenhoff, E. A1 - Kirschner-Hermanns, R. A1 - Mühl, Thomas A1 - Klinge, Uwe T1 - Elongation of textile pelvic floor implants under load is related to complete loss of effective porosity, thereby favoring incorporation in scar plates JF - Journal of biomedical materials research. Part A N2 - Use of textile structures for reinforcement of pelvic floor structures has to consider mechanical forces to the implant, which are quite different to the tension free conditions of the abdominal wall. Thus, biomechanical analysis of textile devices has to include the impact of strain on stretchability and effective porosity. Prolift® and Prolift + M®, developed for tension free conditions, were tested by measuring stretchability and effective porosity applying mechanical strain. For comparison, we used Dynamesh-PR4®, which was designed for pelvic floor repair to withstand mechanical strain. Prolift® at rest showed moderate porosity with little stretchability but complete loss of effective porosity at strain of 4.9 N/cm. Prolift + M® revealed an increased porosity at rest, but at strain showed high stretchability, with subsequent loss of effective porosity at strain of 2.5 N/cm. Dynamesh PR4® preserved its high porosity even under strain, but as consequence of limited stretchability. Though in tension free conditions Prolift® and Prolift + M® can be considered as large pore class I meshes, application of mechanical strain rapidly lead to collapse of pores. The loss of porosity at mechanical stress can be prevented by constructions with high structural stability. Assessment of porosity under strain was found helpful to define requirements for pelvic floor devices. Clinical studies have to prove whether devices with high porosity as well as high structural stability can improve the patients' outcome. Y1 - 2014 U6 - https://doi.org/10.1002/jbm.a.34767 SN - 1552-4965 VL - 102 IS - 4 SP - 1079 EP - 1084 PB - Wiley CY - New York ER - TY - JOUR A1 - Hüning, Felix A1 - Wilke, I. A1 - Nakielski, G. A1 - Kotzler, J. T1 - Dynamic conductivity of YBCO thin films from low to very high frequencies / Wilke, I. ; Nakielski, G. ; Kotzler, J. ; Subke, K. O. ; Jaekel, C. ; Hüning, F. ; Roskos, H. G. ; Kurz, Heinrich JF - Applied superconductivity 1997 : proceedings of EUCAS 1997, the Third European Conference on Applied Superconductivity, held in the Netherlands, 30 June - 3 July 1997 / ed. by H. Rogalla Y1 - 1997 SN - 0-7503-0487-1 N1 - Institute of Physics conference series 158 SP - 121 EP - 124 PB - IOP CY - Bristol ER - TY - JOUR A1 - Hüning, Felix A1 - Sparta, K. A1 - Redhammer, G. J. A1 - Roussel, P. T1 - Structural Phase Transition in the 2D Spin Dimer Compound SrCu2(BO3)2 / Sparta, K. ; Redhammer, G. J. ; Roussel, P. ; Heger, G. ; Roth, G. ; Ionescu, A. Lemmens, P. ; Grove, M. ; Güntherrodt, G. ; Hüning, F. ; Lueken, H. ; Kageyama, H. ; Onizuka, K ; Ueda JF - The European Physical Journal B - Condensed Matter and Complex Systems. 19 (2001), H. 4 Y1 - 2001 SN - 1434-6036 SP - 507 EP - 516 PB - - ER - TY - JOUR A1 - Hüning, Felix A1 - Luken, Heiko A1 - Schilder, Herbert A1 - Eifert, Thomas T1 - Magnetochemistry: Compounds and Concepts / Lueken, Heiko ; Schilder, Herbert ; Eifert, Thomas ; Handrick, Klaus ; Hüning, Felix JF - Advances in Solid State Physics. 201 (2001) Y1 - 2001 SP - 515 EP - 532 PB - - ER - TY - JOUR A1 - Hüning, Felix A1 - Leineweber, A. A1 - Jacobs, H. A1 - Lueken, H. T1 - ε-Fe3N: magnetic structure, magnetization and temperature dependent disorder of nitrogen / Leineweber, A. ; Jacobs, H. ; Hüning, F. ; Lueken, H. ; Schilder, H. ; Kockelmann, W. JF - Journal of Alloys and Compounds. 288 (1999), H. 1-2 N2 - ε-Fe3N has been investigated by time-of-flight neutron diffraction (temperature range 4.2–618 K) and SQUID magnetometry (2–700 K, B≤5 T). A ferromagnetic spin structure is observed with magnetic moments oriented perpendicular to the c-axis of the hexagonal nuclear structure. The magnetic saturation moment of iron is 2.2 μB at 4.2 K from neutron diffraction and 2.0 μB from magnetic measurements and decreases in a Brillouin-like manner on heating to TC=575 K. Above 450 K an increasing but reversible disorder of the nitrogen partial structure is observed. Y1 - 1999 SN - 1873-4669 VL - 288 IS - 1-2 SP - 79 EP - 87 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Hüning, Felix A1 - Leineweber, A. A1 - Jacobs, H. A1 - Lueken, H. T1 - Nitrogen Ordering and ferromagnetic properties of -Fe3N1+x (0.10  x  0.39) and -Fe3(N0.80C0.20)1.38 / Leineweber, A. ; Jacobs, H. ; Hüning, F. ; Lueken, H. ; Kockelmann, W. JF - Journal of Alloys and Compounds. 316 (2001), H. 1-2 Y1 - 2001 SN - 1873-4669 SP - 21 EP - 38 PB - - ER - TY - JOUR A1 - Hüning, Felix A1 - Jaekel, C. A1 - Francois, I. A1 - Kyas, G. T1 - Microwave surface impedance measurements on high-Tc superconductors / Jaekel, C. ; Francois, I. ; Kyas, G. ; Hüning, F. ; Roskos, H. G. ; Borghs, G. ; Kurz, H. JF - Czechoslovak Journal of Physics. 46 (1996), H. Suppl. 2 Y1 - 1996 SN - 1572-9486 IS - 46 SP - 1117 EP - 1118 PB - Springer Science+Business Media CY - Dordrecht ER - TY - JOUR A1 - Hüning, Felix A1 - Heuermann, Holger A1 - Wache, Franz-Josef A1 - Jajo, Rami Audisho T1 - A new wireless sensor interface using dual-mode radio JF - Journal of Sensors and Sensor Systems : JSSS N2 - The integration of sensors is one of the major tasks in embedded, control and “internet of things” (IoT) applications. For the integration mainly digital interfaces are used, starting from rather simple pulse-width modulation (PWM) interface to more complex interfaces like CAN (Controller Area Network). Even though these interfaces are tethered by definition, a wireless realization is highly welcome in many applications to reduce cable and connector cost, increase the flexibility and realize new emerging applications like wireless control systems. Currently used wireless solutions like Bluetooth, WirelessHART or IO-Link Wireless use dedicated communication standards and corresponding higher protocol layers to realize the wireless communication. Due to the complexity of the communication and the protocol handling, additional latency and jitter are introduced to the data communication that can meet the requirements for many applications. Even though tunnelling of other bus data like CAN data is generally also possible the latency and jitter prevent the tunnelling from being transparent for the bus system. Therefore a new basic technology based on dual-mode radio is used to realize a wireless communication on the physical layer only, enabling a reliable and real-time data transfer. As this system operates on the physical layer it is independent of any higher layers of the OSI (open systems interconnection) model. Hence it can be used for several different communication systems to replace the tethered physical layer. A prototype is developed and tested for real-time wireless PWM, SENT (single-edge nibble transmission) and CAN data transfer with very low latency and jitter. Y1 - 2018 U6 - https://doi.org/10.5194/jsss-7-507-2018 VL - Volume 7 IS - 2 SP - 507 EP - 515 PB - Copernicus Publ. CY - Göttingen ER - TY - JOUR A1 - Hüning, Felix A1 - Heuermann, Holger A1 - Wache, Franz-Josef T1 - Wireless CAN without WLAN or Bluetooth JF - CAN Newsletter N2 - In two developed concepts, dual-mode radio enables CAN participants to be integrated wirelessly into a CAN network. Constructed from a few components, a protocol-free, real-time transmission and thus transparent integration into CAN is provided. Y1 - 2018 IS - December 2018 SP - 44 EP - 46 ER - TY - JOUR A1 - Hüning, Felix A1 - Heuermann, Holger A1 - Wache, Franz-Josef T1 - Wireless CAN JF - Etz: Elektrotechnik & Automation N2 - In modernen elektronischen und mechatronischen Systemen, z. B. im industriellen oder automobil Bereich, kommunizieren eingebettete Steuergeräte und Sensoren vielfach über Bussysteme wie CAN oder LIN. Die Kommunikation findet in der Regel drahtgebunden statt, so dass der Kabelbaum für die Kommunikation sehr groß werden kann. Daher ist es naheliegend, Leitungen und dazugehörige Stecker, z. B. für nicht-sicherheitskritische Komfortsysteme, einzusparen und diese durch gerichtete Funkstrecken für kurze Entfernungen zu ersetzen. Somit könnten Komponenten wie ECUs oder Sensoren kabel- und steckerlos in ein Bussystem integriert werden. Zudem ist eine einfache galvanische und mechanische Trennung zu erreichen. Funkübertragung wird bei diesen Bussystemen derzeit nicht eingesetzt, da insbesondere die Echtzeitfähigkeit und die Robustheit der vorhandenen Funksysteme nicht den Anforderungen der Anwendungen entspricht. Zudem sind bestehende Funksysteme wie WLAN oder Bluetooth im Vergleich zur konventionellen Verkabelung teuer und es besteht hierbei die Möglichkeit, dass sie ausspioniert werden können und so sensible Daten entwendet werden können. In dieser Arbeit wird eine alternative Realisierung zu den bestehenden Funksystemen vorgestellt, die aus wenigen Komponenten aufzubauen ist. Es ist eine protokolllose, echtzeitfähige Übertragung möglich und somit die transparente Integration in ein Bussystem wie CAN. Y1 - 2018 SN - 0170-1711 VL - 139 IS - 10 SP - 22 EP - 26 PB - VDE-Verlag CY - Wuppertal ER - TY - JOUR A1 - Hüning, Felix A1 - Eifert, T. A1 - Lueken, H. A1 - Schmidt, P. T1 - High-temperature series expansion of the magnetic susceptibility of extended magnetic systems in a complete computer implementation / Eifert, T. ; Hüning, F. ; Lueken, H. ; Schmidt, P. ; Thiele, G. JF - Chemical Physics Letters. 364 (2002), H. 1-2 Y1 - 2002 SN - 0009-2614 SP - 69 EP - 74 PB - - ER - TY - JOUR A1 - Hüning, Felix A1 - Eifert, T. A1 - Handrick, K. A1 - Neuhausen, U. T1 - Computational Magnetochemistry: Complementary Quantum Mechanical Tools / Eifert, T. ; Handrick, K. ; Hüning, F. ; Neuhausen, U. ; Schilder, H. ; Lueken, H. JF - Zeitschrift für Anorganische und Allgemeine Chemie (ZAAC) - Journal of Inorganic and General Chemistry . 632 (2006), H. 4 Y1 - 2006 SN - 1521-3749 SP - 521 EP - 529 PB - - ER - TY - JOUR A1 - Hüning, Felix A1 - Eifert, T. A1 - Handrick, K. A1 - Neuhausen, U. T1 - Computational Magnetochemistry: Complementary Quantum Mechanical Tools / Eifert, T. ; Handrick, K. ; Hüning, F. ; Neuhausen, U. ; Schilder, H. ; Lueken, H. JF - 20 Jahre Wilhelm-Klemm-Stiftung / Kuratorium der Wilhelm-Klemm-Stiftung (Hrsg.) Y1 - 2006 SN - 978-3-8322-5520-6 SP - 193ff PB - Shaker CY - Aachen ER - TY - JOUR A1 - Hüning, Felix A1 - De Matteis, Stefan T1 - Entwicklung eines taktilen HMI für sehbehinderte und blinde Nutzerinnen und Nutzer JF - Blind - sehbehindert Y1 - 2020 SN - 0176-7836 VL - 140 IS - 2 SP - 9 EP - 19 PB - Edition Bentheim CY - Würzburg ER - TY - JOUR A1 - Hüning, Felix A1 - Backes, Andreas T1 - Direct observation of large Barkhausen jump in thin Vicalloy wires JF - IEEE Magnetics Letters Y1 - 2020 SN - 1949-307X U6 - https://doi.org/10.1109/LMAG.2020.3046411 VL - 11 IS - Art. 2506504 SP - 1 EP - 4 PB - IEEE CY - New York, NY ER - TY - JOUR A1 - Hüning, Felix T1 - Hart im Nehmen : Low-Voltage-Powermosfets mit Super-Junction-1-Technologie optimieren JF - Elektronik-Journal. 44 (2009), H. 12 Y1 - 2009 SN - 0013-5674 SP - 36 EP - 38 PB - - ER - TY - JOUR A1 - Hüning, Felix T1 - Die Anforderungen steigen : Entwicklungstrends bei MOSFETs für den Automobilbereich JF - Elektronik-Industrie. 39 (2008), H. 5 Y1 - 2008 SN - 0174-5522 SP - 74 EP - 76 PB - - ER - TY - JOUR A1 - Hüning, Felix T1 - Robusti affidabili per le Sfide dell’automotive JF - Selezione di Elettronica (2008) Y1 - 2008 SP - 116 EP - 117 PB - - ER - TY - JOUR A1 - Hüning, Felix T1 - Mosfet ottimizzati per l’automotive JF - Selezione di Elettronica (2009) Y1 - 2009 SP - 115 EP - 117 PB - - ER - TY - JOUR A1 - Hüning, Felix T1 - Entwicklungstrends bei MOSFETs für den Automobilbereich JF - Elektronik-Industrie . 39 (2008), H. 5 Y1 - 2008 SN - 0174-5522 SP - 74 EP - 76 PB - - ER - TY - JOUR A1 - Hüning, Felix T1 - SMD packages for PowerMOSFETs in automotive applications – developments and trends JF - Automotive Designline Europe (2009) Y1 - 2009 PB - - ER - TY - JOUR A1 - Hüning, Felix T1 - Using Trench PowerMOSFETs in Linear Mode JF - Power Electronics Europe (2012) N2 - If we think about applications for modern Power MOSFETs using trench technology, running them in linear mode may not be top of the priority list. Yet there are multiple uses for Trench Power MOSFETs in linear mode. In fact, even turning the device on and off in switching applications is a form of linear operation. Also, these components can be run in linear mode to protect the device against voltage surges. This article will illustrate the factors that need to be considered for linear operation and show how Trench Power MOSFETs are suited to it. Y1 - 2012 SN - 1748-3530 SP - 27 EP - 29 PB - DFA Media CY - Tonbridge ER - TY - JOUR A1 - Hüning, Felix T1 - PowerMOSFETs in ANL2-Technologie : Ansteuerungen bis in den kW-Bereich mit wenig Verlustleistung und Platzbedarf JF - Elektronik-Industrie Y1 - 2011 SN - 0174-5522 VL - 42 IS - 10 SP - 36 EP - 39 PB - Hüthig CY - Heidelberg ER - TY - JOUR A1 - Hüning, Felix T1 - Nachrüstmöglichkeiten von Dieselfahrzeugen aus technischer Sicht JF - Zeitschrift für Verkehrsrecht : NZV Y1 - 2019 IS - 1 SP - 27 EP - 32 PB - C.H.Beck ER - TY - JOUR A1 - Hulsebosch, R. J. A1 - Günther, C. A1 - Horn, C. A1 - Holtmanns, S. A1 - Howker, K. A1 - Paterson, K. A1 - Claessens, J. A1 - Schuba, Marko ED - Mitchell, Chris J. T1 - Pioneering Advanced Mobile Privacy and Security JF - Security for mobility Y1 - 2004 SN - 9781849190886 U6 - https://doi.org/10.1049/PBTE051E_ch N1 - IEE telecommunications series ; 51 SP - 383 EP - 432 PB - Institution of Electrical Engineers CY - London ER - TY - JOUR A1 - Holtrup, S. A1 - Sadeghfam, Arash A1 - Heuermann, Holger A1 - Awakowicz, P. T1 - Characterization and optimization technique for microwave-driven high-intensity discharge lamps using hot S-parameters JF - IEEE transactions on microwave theories and techniques N2 - High-intensity discharge lamps can be driven by radio-frequency signals in the ISM frequency band at 2.45 GHz, using a matching network to transform the impedance of the plasma to the source impedance. To achieve an optimal operating condition, a good characterization of the lamp in terms of radio frequency equivalent circuits under operating conditions is necessary, enabling the design of an efficient matching network. This paper presents the characterization technique for such lamps and presents the design of the required matching network. For the characterization, a high-intensity discharge lamp was driven by a monofrequent large signal at 2.45 GHz, whereas a frequency sweep over 300 MHz was performed across this signal to measure so-called small-signal hot S-parameters using a vector network analyzer. These parameters are then used as an equivalent load in a circuit simulator to design an appropriate matching network. Using the measured data as a black-box model in the simulation results in a quick and efficient method to simulate and design efficient matching networks in spite of the complex plasma behavior. Furthermore, photometric analysis of high-intensity discharge lamps are carried out, comparing microwave operation to conventional operation. Y1 - 2014 U6 - https://doi.org/10.1109/TMTT.2014.2342652 SN - 0018-9480 VL - 62 IS - 10 SP - 2471 EP - 2480 PB - IEEE CY - New York ER - TY - JOUR A1 - Hofmann, Till A1 - Limpert, Nicolas A1 - Mataré, Victor A1 - Schönitz, Sebastian A1 - Niemueller, Tim A1 - Ferrein, Alexander A1 - Lakemeyer, Gerhard T1 - The Carologistics RoboCup Logistics Team 2018 N2 - The Carologistics team participates in the RoboCup Logistics League for the seventh year. The RCLL requires precise vision, manipulation and path planning, as well as complex high-level decision making and multi-robot coordination. We outline our approach with an emphasis on recent modifications to those components. The team members in 2018 are David Bosen, Christoph Gollok, Mostafa Gomaa, Daniel Habering, Till Hofmann, Nicolas Limpert, Sebastian Schönitz, Morian Sonnet, Carsten Stoffels, and Tarik Viehmann. This paper is based on the last year’s team description. Y1 - 2018 ER - TY - JOUR A1 - Hoffmann, Ulrich A1 - Schermutzki, Margret A1 - Winckelmann-Schlieper, Katja T1 - Kompetenzbasierte Verzahnung von berufspraktischem und wissenschaftlichem Lernen : Der Studiengang Prozesstechnik der FH Aachen JF - Berufsbildung in Wissenschaft und Praxis (BWP). 39 (2010), H. 2 Y1 - 2010 SN - 0341-4515 SP - 32 EP - 36 ER - TY - JOUR A1 - Hoffmann, Ulrich T1 - Neue Wege in die Hochschule – Beispiel des berufsbegleitenden Studienganges Prozesstechnik der FH Aachen und der Rhein-Erft Akademie JF - HIS: Forum Hochschule. 2008 (2008), H. F14 Y1 - 2008 SN - 1863-5563 SP - 130 EP - 138 ER - TY - JOUR A1 - Hoffmann, Andreas A1 - Rohrbach, Felix A1 - Uhl, Matthias A1 - Ceblin, Maximilian A1 - Bauer, Thomas A1 - Mallah, Marcel A1 - Jacob, Timo A1 - Heuermann, Holger A1 - Kuehne, Alexander J. C. T1 - Atmospheric pressure plasma-jet treatment of polyacrylonitrile-nonwovens—Stabilization and roll-to-roll processing JF - Journal of Applied Polymer Science N2 - Carbon nanofiber nonwovens represent a powerful class of materials with prospective application in filtration technology or as electrodes with high surface area in batteries, fuel cells, and supercapacitors. While new precursor-to-carbon conversion processes have been explored to overcome productivity restrictions for carbon fiber tows, alternatives for the two-step thermal conversion of polyacrylonitrile precursors into carbon fiber nonwovens are absent. In this work, we develop a continuous roll-to-roll stabilization process using an atmospheric pressure microwave plasma jet. We explore the influence of various plasma-jet parameters on the morphology of the nonwoven and compare the stabilized nonwoven to thermally stabilized samples using scanning electron microscopy, differential scanning calorimetry, and infrared spectroscopy. We show that stabilization with a non-equilibrium plasma-jet can be twice as productive as the conventional thermal stabilization in a convection furnace, while producing electrodes of comparable electrochemical performance. KW - batteries and fuel cells KW - electrospinning KW - fibers KW - irradiation KW - porous materials Y1 - 2022 U6 - https://doi.org/10.1002/app.52887 SN - 0021-8995 (Print) SN - 1097-4628 (Online) N1 - Weitere Informationen: Bundesministerium für Bildung und Forschung, Fördernummer: 13XP5036E. Deutsche Forschungsgemeinschaft, Fördernummern: 390874152, 441209207, 327886311 VL - 139 IS - 37 SP - 1 EP - 9 PB - Wiley ER - TY - JOUR A1 - Hillgärtner, Michael A1 - Stonies, R. A1 - Peier, D. A1 - Voges, E. T1 - Design of Low Cost Antennas for Reverberation Chambers JF - Proceedings of the 16th International Zurich Symposium on Electromagnetic Compatibility : [EMC Week 2005, Zurich, Switzerland, February 13 - 18 ; technical exhibition on EMC and RF/microwave Measurements and Instrumentation (February 15 - 17)] / [Laboratory for Electromagnetic Fields and Microwave Electronics, Swiss Federal Institute of Technology Zurich] Y1 - 2005 SN - 3-9521199-9-7 N1 - Nebent.: EMC Zurich 2005 Symposium proceedings. - International Zurich Symposium and Technical Exhibition on Electromagnetic Compatibility <16, 2005, Zürich> Institut für Feldtheorie und Höchstfrequenztechnik PB - ETH-Zentrum-IFH CY - Zürich ER - TY - JOUR A1 - Hillgärtner, Michael A1 - Rinkleff, T T1 - Untersuchung eines hybriden EMV-Simulationsverfahrens anhand eines virtuellen Komponententests JF - Technisches Messen. 70 (2003), H. 3 Y1 - 2003 SN - 0340-837X N1 - 2. ISSN: 0178-2312; 3. ISSN: 0171-8096 SP - 133 EP - 140 ER - TY - JOUR A1 - Hillgärtner, Michael A1 - Peier, Dirk T1 - Effiziente Bestimmung der Kabelschirmdämpfung bei hohen Frequenzen in Modenverwirbelungskammern JF - Elektromagnetische Verträglichkeit : EMV 2006 ; Internationale Fachmesse und Kongress für Elektromagnetische Verträglichkeit, 7. - 9. März 2006, Messe Düsseldorf / Karl-Heinz Gonschorek. Veranst.: MESAGO-Messe-Frankfurt GmbH, Stuttgart Y1 - 2006 SN - 978-3-8007-2933-3 N1 - EMV <2006, Stuttgart> ; Mesago-Messe-Frankfurt <2006, Stuttgart> SP - 261 EP - 268 PB - VDE-Verl. CY - Berlin [u.a.] ER - TY - JOUR A1 - Hillgärtner, Michael A1 - Peier, Dirk T1 - Einflussgrössen bei der Gütebestimmung von Modenverwirbelungskammern JF - Elektromagnetische Verträglichkeit : EMV 2004, 12. Internationale Fachmesse und Kongress für Elektromagnetische Verträglichkeit, 10. - 12. Februar 2004, Messe Düsseldorf ; [mit CD-ROM] / Veranst.: MESAGO-Messe-Frankfurt GmbH, Stuttgart. Hrsg.: Kurt Feser Y1 - 2004 SN - 3-8007-2810-9 N1 - EMV <2004, Stuttgart> ; Mesago-Messe-Frankfurt <2004, Stuttgart> SP - 79 EP - 86 PB - VDE-Verl. CY - Berlin [u.a.] ER - TY - JOUR A1 - Hillgärtner, Michael A1 - Peier, Dirk T1 - Design of a Measurement Setup for the Impedance of Low-Resistance Plate-Conductors in the RF-Range JF - Proceedings of the 10th International Conference on Optimization of Electrical and Electronic Equipment, OPTIM '06, Braşov, May 18 - 20, 2006 / ed. by The Transilvania University of Braşov, Faculty of Electrical Engineering and Computer Science. [Ed. Mihai Cernat .̤] . - Vol. 1: Keynote addresses, electrotechnics Y1 - 2006 SN - 978-973-635703-9 N1 - International Conference on Optimization of Electrical and Electronic Equipment <10, 2006, Braşov>; OPTIM <10, 2006, Braşov> SP - 59 EP - 64 CY - Braşov ER - TY - JOUR A1 - Hillgärtner, Michael A1 - Peier, Dirk T1 - Einflussgrößen bei der Gütebestimmung von Modenverwirbelungskammern JF - HF-Report : Hochfrequenztechnik, Optoelektronik, EMV, Mikrowellentechnik, Kommunikationstechnik. 19 (2005), H. Februar-März Y1 - 2005 SN - 1431-827X SP - 33 EP - 36 ER - TY - JOUR A1 - Hillgärtner, Michael A1 - Peier, Dirk T1 - Nutzbarkeit bestehender, geschirmter Labore als Modenverwirbelungskammer JF - Elektromagnetische Verträglichkeit : EMV 2008, Internationale Fachmesse und Kongress für Elektromagnetische Verträglichkeit, 19. - 21. Februar 2008, Messe Düsseldorf / Gonschorek, Karl-Heinz Y1 - 2008 SN - 978-3-8007-3075-9 N1 - EMV <2008, Stuttgart> ; Mesago-Messe-Frankfurt <2008, Stuttgart> SP - 579 EP - 586 PB - VDE-Verl. CY - Berlin [u.a.] ER - TY - JOUR A1 - Hillgärtner, Michael A1 - Kappel, U. T1 - Radiating Impedance of Mains Cabling During Emissions Testing JF - EMC Europe 2006 Barcelona : International Symposium on Electromagnetic Compatibility; September 4 - 8, 2006, Campus Nord, Technical University of Catalonia, Barcelona, Spain / [organized by Technical University of Catalonia (UPC) ... Ed. and publ. by: Ferran Silva ...]. - Vol. 1: Proceedings 1 Y1 - 2006 SN - 84-689-9439-1 N1 - EMC Europe <7,2006,Barcelona>; International Symposium on Electromagnetic Compatibility <7, 2006, Barcelona> SP - 17 EP - 22 CY - Barcelona ER - TY - JOUR A1 - Hillgärtner, Michael T1 - Normative Regulations JF - ECPE Cluster Seminar EMC in Hybrid and Electric Vehicles : 18 May 2010, Fraunhofer Institute Erlangen Y1 - 2010 N1 - Seminar EMC in Hybrid and Electric Vehicles <2010, Erlangen> PB - European Center for Power Electronics CY - Nürnberg ER - TY - JOUR A1 - Heuermann, Holger A1 - Thalayasingam, K. T1 - Novel vector non-linear measurement system for intermodulation measurements / Thalayasingam, K.; Heuermann, H. JF - European Microwave Conference, 2009 : EuMC 2009 ; Sept. 29, 2009 - Oct. 1, 2009, Rome, Italy ; part of European Microwave Week (EuMW) / sponsored by EuMA, European Microwave Association ... Endorsed by IEEE Y1 - 2009 SN - 978-1-4244-4748-0 N1 - European Microwave Conference ; (39 : ; 2009.09.29-10.01 : ; Rome) SP - 926 EP - 929 PB - IEEE CY - Piscataway, NJ ER - TY - JOUR A1 - Heuermann, Holger A1 - Stolle, Reinhard A1 - Schiek, Burkhard T1 - Novel Algorithms for FMCW Range Finding with Microwaves. Stolle, R.; Heuermann, H.; Schiek, B. Y1 - 1995 N1 - Conference proceedings / IEEE NTC '95, the Microwave Systems Conference; NTC <1995, Orlando, Fla.> SP - 129 EP - 132 ER - TY - JOUR A1 - Heuermann, Holger A1 - Stolle, Reinhard A1 - Schiek, Burkhard T1 - Neuartige Algorithmen fuer die Mikrowellen-Entfernungsmessung JF - Kleinheubacher Berichte : Vorträge und Berichte der gemeinsamen Tagung des U.R.S.I.-Landesausschusses in der Bundesrepublik Deutschland / Hrsg.: Deutsche Telekom AG. 38. 1995 (1995) Y1 - 1995 SP - 817 EP - 834 ER - TY - JOUR A1 - Heuermann, Holger A1 - Stolle, Reinhard A1 - Schiek, Burkhard T1 - Auswertemethoden zur Praezisions-Entfernungsmessung mit FMCW-Systemen und deren Anwendung im Mikrowellenbereich JF - tm - Technisches Messen. 62. 1995 (1995), H. 2 Y1 - 1995 SP - 66 EP - 73 ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, Burkhard T1 - The double-LNN Calibration technique for scattering parameter measurements of microstrip devices JF - Conference proceedings Y1 - 1995 N1 - European Microwave Conference <25, 1995, Bologna> SP - 343 EP - 347 PB - NEXUS House CY - Kent ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, Burkhard T1 - Calibration of network analyser measurements with leakage errors JF - Electronics letters. 30 (1994), H. 1 Y1 - 1994 SN - 0013-5194 SP - 52 EP - 53 ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, Burkhard T1 - Results of Network Analyzer Measurements with Leakage Errors Corrected with the TMS-15-Term Procedure Y1 - 1994 N1 - 1994 IEEE MTT-S International Microwave Symposium digest : May 23 - 27, 1994, San Diego Convention Center, San Diego, California / H. J. Kuno, ed. SP - 1361 EP - 1364 ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, Burkhard T1 - Scattering Parameter Measurements of Microstrip Devices using the Double-LNN Calibration Technique JF - Conference proceedings : [Palais des Festivals et des Congrès Cannes, France, 5 - 8 September 1994] Y1 - 1994 SN - 0-9518032-5-5 N1 - European Microwave Conference <24, 1994, Cannes> PB - Nexus Business Communications CY - Swanley ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, Burkhard T1 - Neue Kalibrierverfahren fuer on-wafer-Messungen JF - Kleinheubacher Berichte : Vorträge und Berichte der gemeinsamen Tagung des U.R.S.I.-Landesausschusses in der Bundesrepublik Deutschland / Hrsg.: Deutsche Telekom AG. 37. 1993 (1993) Y1 - 1993 SP - 195 EP - 204 ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, Burkhard T1 - LNN (Line-Network-Network): Verfahren zur Kalibrierung von Netzwerkanalysatoren JF - Kleinheubacher Berichte : Vorträge und Berichte der gemeinsamen Tagung des U.R.S.I.-Landesausschusses in der Bundesrepublik Deutschland / Hrsg.: Deutsche Telekom AG. 36. 1992 (1992) Y1 - 1992 SP - 327 EP - 335 ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, Burkhard T1 - Line Network Network (LNN): an alternative in-fixture calibration procedure JF - IEEE transactions on microwave theory and techniques : MTT ; a publication of the IEEE Microwave Theory and Techniques Society. 45 (1997), H. 3 Y1 - 1997 SN - 0018-9480 SP - 408 EP - 413 ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, Burkhard T1 - The In-Fixture Calibration Procedure Line-Network-Network-LNN JF - Conference proceedings : monday 6th to thursday 9th september 1993, Palacio de Congresos, Madrid, Spain ; [the international conference and exhibition designed for the Microwave Community] Y1 - 1992 SN - 0-946821-23-2 N1 - European Microwave Conference <23, 1993, Madrid> SP - 500 EP - 505 PB - Reed Exhibition Companies CY - Tunbridge Wells ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, Burkhard T1 - A Fast and Robust Procedure for the Determination of the Scattering Parameters for Network Analyzer Calibration Y1 - 1992 N1 - Precision electromagnetic measurements : conference Paris, 9-12 June 1992 = Conférence sur les Mesures Electromagnétiques de Précision. SP - 373 EP - 374 CY - Paris ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, Burkhard T1 - Sichere on-wafer-Streuparameter-Messungen mit Selbstkalibrierverfahren JF - Kleinheubacher Berichte : Vorträge und Berichte der gemeinsamen Tagung des U.R.S.I.-Landesausschusses in der Bundesrepublik Deutschland / Hrsg.: Deutsche Telekom AG. 38. 1994 (1994) Y1 - 1994 SP - 611 EP - 622 ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, Burkhard T1 - Robuster Algorithmus zur Streuparameterbestimmung für systemfehlerkorrigierte Netzwerkanalysatoren JF - Kleinheubacher Berichte : Vorträge und Berichte der gemeinsamen Tagung des U.R.S.I.-Landesausschusses in der Bundesrepublik Deutschland / Hrsg.: Deutsche Telekom AG. 35. 1991 (1991) Y1 - 1991 SP - 555 EP - 556 ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, Burkhard T1 - Error Corrected Impedance Measurements with a Network Analyzer Y1 - 1994 N1 - 1994 Conference on Precision Electromagnetic Measurements digest : 27 June - 1 July 1994, Boulder, Colorado, USA / Organized by National Institute of Standards and Technology. Ed. by Edie DeWeese SP - 125 EP - 126 ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, Burkhard T1 - LNN( Line-Network-Network): The In-Fixture Calibration Procedure Y1 - 1993 N1 - XXIVth General Assembly of the International URSI, Kyoto SP - 149 EP - 149 ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, Burkhard T1 - A Generalization of the Txx Network Analyzer Self-Calibration Procedure JF - Conference proceedings : monday 24th to thursday 27th august 1992, Helsinki University of Technology, Espoo, Finland ; [the international conference and exhibition designed for the Microwave Community]. Vol. 2 Y1 - 1992 SN - 0-946821-77-1 N1 - European Microwave Conference <22, 1992, Espoo> ; Teknillinen Korkeakoulu SP - 907 EP - 912 PB - Microwave Exhibitions and Publishers CY - Tunbridge Wells ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, B. T1 - Procedures for the Determination of the Scattering Parameters for Network Analyzer Calibration JF - IEEE transactions on instrumentation and measurement : IM / Institute of Electrical and Electronics Engineers, Instrumentation and Measurement Group. 42 (1993), H. 2 Y1 - 1993 SN - 0018-9456 SP - 528 EP - 531 ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, B. T1 - Robust Algorithms for Txx Network Analyzer Self-Calibration Procedures JF - IEEE transactions on instrumentation and measurement : IM / Institute of Electrical and Electronics Engineers, Instrumentation and Measurement Group. 43 (1994), H. 1 Y1 - 1994 SN - 0018-9456 SP - 18 EP - 23 ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, B. T1 - Results of network analyzer measurements with leakage errors-corrected with direct calibration techniques JF - IEEE transactions on instrumentation and measurement : IM / Institute of Electrical and Electronics Engineers, Instrumentation and Measurement Group. 46 (1997), H. 5 Y1 - 1997 SN - 0018-9456 SP - 1120 EP - 1127 ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, B. T1 - Error corrected impedance measurements with a network analyzer JF - IEEE transactions on instrumentation and measurement : IM / Institute of Electrical and Electronics Engineers, Instrumentation and Measurement Group. 44 (1995), H. 2 Y1 - 1995 SN - 0018-9456 SP - 295 EP - 299 ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, B. T1 - 15-term self-calibration methods for the error-correction of on-wafer measurements JF - IEEE transactions on instrumentation and measurement : IM / Institute of Electrical and Electronics Engineers, Instrumentation and Measurement Group. 46 (1997), H. 5 Y1 - 1997 SN - 0018-9456 SP - 1105 EP - 1110 ER - TY - JOUR A1 - Heuermann, Holger A1 - Sadeghfam, Arash A1 - Boehm, H. T1 - Ultra Compact Multi-Mode Filter with Novel Rat-Race Inductor. Sadeghfam, Arash; Heuermann, Holger; Boehm, H. JF - Conference proceedings : 3 - 7 October 2005, CNIT la Défense, Paris, France; [comprises the] 35th European Microwave Conference 2005 ; The European Conference on Wireless Technology 2005 ; European Radar Conference 2005 ; GAAS 2005, The European Gallium A. Vol. 2 Y1 - 2005 SN - 2-9600551-0-1 N1 - European Microwave Conference ; (35, 2005, Paris) ; European Microwave Week ; (2005, Paris) SP - 4 pp. PB - Horizon House Publ CY - London ER - TY - JOUR A1 - Heuermann, Holger A1 - Sadeghfam, Arash T1 - Electrically tunable bandpass filter with integrated carrier suppression for UHF RFID systems / Sadeghfam, Arash ; Heuermann, Holger JF - European Microwave Conference, 2008, EuMC 2008, 38th Y1 - 2008 SN - 978-2-87487-006-4 SP - 1727 EP - 1730 ER - TY - JOUR A1 - Heuermann, Holger A1 - Sadeghfam, Arash T1 - On the design of multimode integrated circuits in multilayered processes / Sadeghfam, A. ; Heuermann, H. JF - European Microwave Conference, 2007, 9-12 Oct. 2007 Y1 - 2007 SN - 978-2-87487-001-9 N1 - EuMC 2007 ; European Microwave Conference ; (37 : ; 2007.10.09-12 : ; Munich) SP - 516 EP - 519 ER - TY - JOUR A1 - Heuermann, Holger A1 - Sadeghfam, Arash T1 - Electrically tunable bandpass filter with integrated carrier suppression for UHF RFID systems / Sadeghfam, Arash ; Heuermann, Holger JF - European Conference on Wireless Technology, 2008. EuWiT 2008. Y1 - 2008 SN - 978-2-87487-008-8 SP - 306 EP - 309 ER - TY - JOUR A1 - Heuermann, Holger A1 - Sadeghfam, Arash T1 - Enhanced system architecture for rugged wide band data transmission / Sadeghfam, A. ; Heuermann, H. JF - European Radar Conference, 2009 : EuRAD 2009 ; Sept. 30 - Oct. 2 2009, Rome, Italy ; part of the European Microwave Week (EuMW) / sponsored by EuMA, European Microwave Association Y1 - 2009 SN - 978-2-87487-014-9 N1 - Proceedings of the 6th European Radar Conference SP - 347 EP - 350 PB - IEEE CY - Piscataway, NJ ER - TY - JOUR A1 - Heuermann, Holger A1 - Sadeghfam, Arash T1 - Novel balanced inductor for compact differential systems / Sadeghfam, Arash; Heuermann, Holger JF - Conference proceedings : Tuesday 12th, Wednesday 13th and Thursday 14th October, [RAI International Exhibition and Congress Centre, Amsterdam ; part of European Microwave Week 2004] / EuMA, European Microwave Association Y1 - 2004 SN - 1-580-53992-0 N1 - European Microwave Conference ; (34, 2004, Amsterdam) ; European Microwave Week ; (7, 2004, Amsterdam) SP - 709 EP - 712 PB - Horizon House Publ. CY - London ER - TY - JOUR A1 - Heuermann, Holger A1 - Rumiantsev, A. A1 - Schott, S. T1 - Advanced on-wafer multiport calibration methods for mono- and mixed-mode device characterization JF - On wafer characterization : 63rd ARFTG conference digest, spring 2004, 11 June 2004, Fort Worth, TX / Automatic RF Techniques Group. [Conference chair: John Cable. Publication chair: J. G. Burns] Y1 - 2004 SN - 0-7803-8371-0 N1 - Microwave Theory and Techniques Society. ; Automatic RF Techniques Group ; ARFTG conference ; (63 : ; 2004.06.11 : ; Fort Worth, Tex.) SP - 91 EP - 96 PB - IEEE Operations Center CY - Piscataway, NJ ER - TY - JOUR A1 - Heuermann, Holger A1 - Peters, N. A1 - Schmitz, T. A1 - Sadeghfam, Arash T1 - Concept of Balanced Antennas with Load-Invariant Base Impedance Using a Two Element LC-Coupler. Peters, N., Schmitz, Th., Sadeghfam, A., Heuermann, H. JF - Proceedings of the European microwave association : journal of the European microwave association Y1 - 2005 SP - 117 EP - 122 PB - PLUS CY - Pisa ER - TY - JOUR A1 - Heuermann, Holger A1 - Lünebach, M. T1 - A Novel Dual-Mode-Design for Push-Push Oscillators with Improved Phase Noise Performance. Heuermann, Holger; Lünebach, M. JF - Conference proceedings : 3 - 7 October 2005, CNIT la Défense, Paris, France; [comprises the] 35th European Microwave Conference 2005 ; The European Conference on Wireless Technology 2005 ; European Radar Conference 2005 ; GAAS 2005, The European Gallium A. Vol. 1 Y1 - 2005 SN - 2-9600551-0-1 N1 - European Microwave Conference ; (35, 2005, Paris) ; European Microwave Week ; (2005, Paris) SP - 4 pp. PB - Horizon House Publ CY - London ER - TY - JOUR A1 - Heuermann, Holger A1 - Ibrahim, Irfan A1 - Hillebrand, J. T1 - Vector-Signal-Generator with Two ¿¿-PLL's / Ibrahim, I. ; Hillebrand, J. ; Heuermann, H. JF - European Conference on Wireless Technologies, 2007. ECWT 2007 ; 8 - 10 October 2007 Munich, Germany Y1 - 2007 SN - 978-2-87487-003-3 SP - 1 EP - 4 ER - TY - JOUR A1 - Heuermann, Holger A1 - Ibrahim, Irfan T1 - Novel theory and architecture of a vector signal generator implemented with two PLLs / Ibrahim, Irfan ; Heuermann, Holger JF - European Conference on Wireless Technology, 2008. EuWiT 2008. Y1 - 2008 SN - 978-2-87487-008-8 SP - 85 EP - 88 ER - TY - JOUR A1 - Heuermann, Holger A1 - Ibrahim, Irfan T1 - Improvements in the flicker noise reduction technique for osillator designs / Ibrahim, Irfan ; Heuermann, Holger JF - European Microwave Conference, 2009 : EuMC 2009 ; Sept. 29, 2009 - Oct. 1, 2009, Rome, Italy ; part of European Microwave Week (EuMW) / sponsored by EuMA, European Microwave Association ... Endorsed by IEEE Y1 - 2009 SN - 978-1-4244-4748-0 N1 - EuMC 2009 SP - 1215 EP - 1218 PB - IEEE CY - Piscataway, NJ ER - TY - JOUR A1 - Heuermann, Holger A1 - Holtrup, Stephan T1 - Fundamentals and ignition of a microplasma at 2.45 GHZ / Holtrup, Stephan ; Heuermann, Holger JF - European Microwave Conference, 2009 : EuMC 2009 ; Sept. 29, 2009 - Oct. 1, 2009, Rome, Italy ; part of European Microwave Week (EuMW) / sponsored by EuMA, European Microwave Association ... Endorsed by IEEE Y1 - 2009 SN - 978-1-4244-4748-0 N1 - EuMC 2009 SP - 1607 EP - 1609 PB - IEEE CY - Piscataway, NJ ER - TY - JOUR A1 - Heuermann, Holger A1 - Hillebrand, Jürgen A1 - Sadeghfam, Arash T1 - Novel Concept of a Digital SigmaDelta-PLL-Phase-Shift-Modulator / Hillebrand, Jürgen ; Sadeghfam, Arash ; Heuermann, Holger Y1 - 2008 SN - 978-3-8007-3086-5 N1 - Microwave Conference (GeMIC), 2008 German SP - 123 EP - 126 ER - TY - JOUR A1 - Heuermann, Holger A1 - Graf, W. T1 - Direkte on-wafer-Messung des Wellenwiderstandes einer Mikrostreifenleitung JF - Kleinheubacher Berichte : Vorträge und Berichte der gemeinsamen Tagung des U.R.S.I.-Landesausschusses in der Bundesrepublik Deutschland / Hrsg.: Deutsche Telekom AG. 41. 1998 (1998) Y1 - 1998 ER - TY - JOUR A1 - Heuermann, Holger A1 - Graf, W. T1 - Direkte Messung der Dispersion des Wellenwiderstandes einer Mikrostreifenleitung JF - Kleinheubacher Berichte : Vorträge und Berichte der gemeinsamen Tagung des U.R.S.I.-Landesausschusses in der Bundesrepublik Deutschland / Hrsg.: Deutsche Telekom AG. 40. 1997 (1997) Y1 - 1997 ER - TY - JOUR A1 - Heuermann, Holger A1 - Graf, W. T1 - Vergleich mehrerer Naeherungsverfahren zur Berechnung des Wellenwiderstandes von Mikrostreifenleitungen mit experimentellen Ergebnissen JF - Kleinheubacher Berichte : Vorträge und Berichte der gemeinsamen Tagung des U.R.S.I.-Landesausschusses in der Bundesrepublik Deutschland / Hrsg.: Deutsche Telekom AG. 39. 1996 (1996) Y1 - 1996 ER - TY - JOUR A1 - Heuermann, Holger A1 - Erkens, Holger T1 - Blocking structures for mixed-mode systems. / Erkens, Holger ; Heuermann, Holger JF - Conference proceedings : Tuesday 12th, Wednesday 13th and Thursday 14th October, [RAI International Exhibition and Congress Centre, Amsterdam ; part of European Microwave Week 2004] / EuMA, European Microwave Association. Vol. 1 Y1 - 2004 SN - 1-580-53992-0 N1 - European Microwave Conference ; (34, 2004, Amsterdam) ; European Microwave Week ; (7, 2004, Amsterdam) SP - 297 EP - 300 PB - Horizon House Publ. CY - London ER - TY - JOUR A1 - Heuermann, Holger A1 - Erkens, H. T1 - Novel RF switch concepts for differential wireless communications frontends. Erkens, H.; Heuermann, H. JF - IEEE Transactions on Microwave Theory and Techniques. 54 (2006), H. 6, Part 1 Y1 - 2006 SN - 0018-9480 SP - 2376 EP - 2382 ER - TY - JOUR A1 - Heuermann, Holger A1 - Erkens, H. T1 - Mixed-Mode Chain Scattering Parameters: Theory and Verification JF - IEEE Transactions on Microwave Theory and Techniques N2 - Chain scattering parameters or T-parameters are a useful tool for calculating cascaded two-ports. With the increasing importance of mixed-mode S-parameters, a need for converting the T-parameters from their unbalanced form into a balanced form emerges for suiting both common and differential mode waves, as well as the mode conversion. This paper presents the derivation of the equations for transformations between mixed-mode S- and T-parameters for a mixed-mode two-port. Although derived in a way very similar to monomode T-parameters, no simplifications were necessary. Measurement results exemplify the quality of the T-parameter transformation under real-life conditions. Y1 - 2007 SN - 0018-9480 U6 - https://doi.org/10.1109/TMTT.2007.902587 VL - 55 IS - 8 SP - 1704 EP - 1708 PB - IEEE CY - New York ER - TY - JOUR A1 - Heuermann, Holger A1 - Erkens, H. T1 - EVM- und BER-optimierter differentieller Einseitenbandmodulator / Erkens, H., Heuermann, H. JF - German Microwave Conference - GeMiC 2005 - : conference proceedings ; University of Ulm, April 5 - 7, 2005 [Elektronische Ressource] / ed.: Wolfgang Menzel. IMA, VDE ... Y1 - 2005 SN - 3-00-015423-X N1 - German Microwave Conference <2005, Ulm> PB - Univ CY - Ulm ER - TY - JOUR A1 - Heuermann, Holger A1 - Emmrich, Thomas A1 - Bongartz, Simon T1 - Microwave spark plug to support ignitions with high compression ratios JF - IEEE Transactions on Plasma Science N2 - Upcoming gasoline engines should run with a larger number of fuels beginning from petrol over methanol up to gas by a wide range of compression ratios and a homogeneous charge. In this article, the microwave (MW) spark plug, based on a high-speed frequency hopping system, is introduced as a solution, which can support a nitrogen compression ratio up to 1:39 in a chamber and more. First, an overview of the high-speed frequency hopping MW ignition and operation system as well as the large number of applications are presented. Both gives an understanding of this new base technology for MW plasma generation. Focus of the theoretical part is the explanation of the internal construction of the spark plug, on the achievable of the high voltage generation as well as the high efficiency to hold the plasma. In detail, the development process starting with circuit simulations and ending with the numerical multiphysics field simulations is described. The concept is evaluated with a reference prototype covering the frequency range between 2.40 and 2.48 GHz and working over a large power range from 20 to 200 W. A larger number of different measurements starting by vector hot-S11 measurements and ending by combined working scenarios out of hot temperature, high pressure and charge motion are winding up the article. The limits for the successful pressure tests were given by the pressure chamber. Pressures ranged from 1 to 39 bar and charge motion up to 25 m/s as well as temperatures from 30◦ to 125◦. KW - Automotive application KW - ignition KW - microplasma KW - microwave (MW) plasma KW - plasma jet Y1 - 2022 U6 - https://doi.org/10.1109/TPS.2022.3183690 SN - 1939-9375 IS - Early Access SP - 1 EP - 6 PB - IEEE ER - TY - JOUR A1 - Heuermann, Holger A1 - Baumann, F.-M. A1 - Fauth, G. A1 - Albert, M. T1 - Results of Network Analyzer Measurements with Leakage Errors Corrected with the TMS-15-Term Procedure JF - On-Line Moisture Analysis of Raw Coal Y1 - 1994 N1 - 1993 International Symposium on On-Line Analysis of Coal : Vienna ; [proceedings]. SP - 1361 EP - 1364 ER - TY - JOUR A1 - Heuermann, Holger T1 - Sure Methods of On-Wafer Scattering Parameter Measurements with Self-Calibration Procedures Y1 - 1996 N1 - 46th ARFTG conference digest : November 30 - December 1. 1995, Safari Resort, Scottsdale, Arizona / Automatic RF Techniques Group. [Publ. chairman: Ed. Godshalk] SP - 136 EP - 145 ER -