@article{HarzheimMuehmelHeuermann2021, author = {Harzheim, Thomas and M{\"u}hmel, Marc and Heuermann, Holger}, title = {A SFCW harmonic radar system for maritime search and rescue using passive and active tags}, series = {International Journal of Microwave and Wireless Technologies}, volume = {13}, journal = {International Journal of Microwave and Wireless Technologies}, number = {Special Issue 7}, publisher = {Cambridge University Press}, address = {Cambridge}, doi = {10.1017/S1759078721000520}, pages = {691 -- 707}, year = {2021}, abstract = {This paper introduces a new maritime search and rescue system based on S-band illumination harmonic radar (HR). Passive and active tags have been developed and tested while attached to life jackets and a small boat. In this demonstration test carried out on the Baltic Sea, the system was able to detect and range the active tags up to a distance of 5800 m using an illumination signal transmit-power of 100 W. Special attention is given to the development, performance, and conceptual differences between passive and active tags used in the system. Guidelines for achieving a high HR dynamic range, including a system components description, are given and a comparison with other HR systems is performed. System integration with a commercial maritime X-band navigation radar is shown to demonstrate a solution for rapid search and rescue response and quick localization.}, language = {en} } @inproceedings{SchoppHeuermannMarso2017, author = {Schopp, Christoph and Heuermann, Holger and Marso, Michel}, title = {Multiphysical Study of an Atmospheric Microwave Argon Plasma Jet}, series = {IEEE Transactions on Plasma Science}, volume = {45}, booktitle = {IEEE Transactions on Plasma Science}, number = {6}, publisher = {IEEE}, issn = {1939-9375}, doi = {10.1109/TPS.2017.2692735}, pages = {932 -- 937}, year = {2017}, language = {en} } @article{HeuermannRumiantsevSchott2004, author = {Heuermann, Holger and Rumiantsev, A. and Schott, S.}, title = {Advanced on-wafer multiport calibration methods for mono- and mixed-mode device characterization}, series = {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]}, journal = {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]}, publisher = {IEEE Operations Center}, address = {Piscataway, NJ}, isbn = {0-7803-8371-0}, pages = {91 -- 96}, year = {2004}, language = {en} } @article{HeuermannSchiek1992, author = {Heuermann, Holger and Schiek, Burkhard}, title = {A Fast and Robust Procedure for the Determination of the Scattering Parameters for Network Analyzer Calibration}, address = {Paris}, pages = {373 -- 374}, year = {1992}, language = {en} } @article{Heuermann1995, author = {Heuermann, Holger}, title = {Selbstkalibrierverfahren zur Systemfehlerkorrektur von Streuparametermessungen auf Halbleitersubstraten}, series = {Mikrowellen und Optronik : Kongreßunterlagen = Microwaves and optronics / MIOP '95, 8. Kongreßmesse f{\"u}r Hochfrequenztechnik, Messehalle Sindelfingen, 30. Mai - 1. Juni 1995. [Hrsg.: Network GmbH]}, journal = {Mikrowellen und Optronik : Kongreßunterlagen = Microwaves and optronics / MIOP '95, 8. Kongreßmesse f{\"u}r Hochfrequenztechnik, Messehalle Sindelfingen, 30. Mai - 1. Juni 1995. [Hrsg.: Network GmbH]}, address = {Hagenburg}, isbn = {3-924651-45-0}, pages = {23 -- 29}, year = {1995}, language = {de} } @article{HeuermannGraf1996, author = {Heuermann, Holger and Graf, W.}, title = {Vergleich mehrerer Naeherungsverfahren zur Berechnung des Wellenwiderstandes von Mikrostreifenleitungen mit experimentellen Ergebnissen}, series = {Kleinheubacher Berichte : Vortr{\"a}ge und Berichte der gemeinsamen Tagung des U.R.S.I.-Landesausschusses in der Bundesrepublik Deutschland / Hrsg.: Deutsche Telekom AG. 39. 1996 (1996)}, journal = {Kleinheubacher Berichte : Vortr{\"a}ge und Berichte der gemeinsamen Tagung des U.R.S.I.-Landesausschusses in der Bundesrepublik Deutschland / Hrsg.: Deutsche Telekom AG. 39. 1996 (1996)}, year = {1996}, language = {de} } @article{HeuermannSchiek1994, author = {Heuermann, Holger and Schiek, Burkhard}, title = {Sichere on-wafer-Streuparameter-Messungen mit Selbstkalibrierverfahren}, series = {Kleinheubacher Berichte : Vortr{\"a}ge und Berichte der gemeinsamen Tagung des U.R.S.I.-Landesausschusses in der Bundesrepublik Deutschland / Hrsg.: Deutsche Telekom AG. 38. 1994 (1994)}, journal = {Kleinheubacher Berichte : Vortr{\"a}ge und Berichte der gemeinsamen Tagung des U.R.S.I.-Landesausschusses in der Bundesrepublik Deutschland / Hrsg.: Deutsche Telekom AG. 38. 1994 (1994)}, pages = {611 -- 622}, year = {1994}, language = {de} } @inproceedings{HeuermannFinger2014, author = {Heuermann, Holger and Finger, Torsten}, title = {2.45 GHz Plasma Powered Spark Plug by Thermal and EM-Optimization}, pages = {30 Folien}, year = {2014}, language = {en} } @article{HeuermannEmmrichBongartz2022, author = {Heuermann, Holger and Emmrich, Thomas and Bongartz, Simon}, title = {Microwave spark plug to support ignitions with high compression ratios}, series = {IEEE Transactions on Plasma Science}, journal = {IEEE Transactions on Plasma Science}, number = {Early Access}, publisher = {IEEE}, issn = {1939-9375}, doi = {10.1109/TPS.2022.3183690}, pages = {1 -- 6}, year = {2022}, abstract = {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◦.}, language = {en} } @inproceedings{SchoppHeuermannHoltrup2014, author = {Schopp, Christoph and Heuermann, Holger and Holtrup, S.}, title = {Investigation on efficacy optimization of RF-driven automotive D-lamps}, series = {44th European Microwave Conference (EuMC),2014, Rome}, booktitle = {44th European Microwave Conference (EuMC),2014, Rome}, doi = {10.1109/EuMC.2014.6986645}, pages = {1154 -- 1157}, year = {2014}, language = {en} } @article{HeuermannSchiek1997, author = {Heuermann, Holger and Schiek, B.}, title = {Results of network analyzer measurements with leakage errors-corrected with direct calibration techniques}, series = {IEEE transactions on instrumentation and measurement : IM / Institute of Electrical and Electronics Engineers, Instrumentation and Measurement Group. 46 (1997), H. 5}, journal = {IEEE transactions on instrumentation and measurement : IM / Institute of Electrical and Electronics Engineers, Instrumentation and Measurement Group. 46 (1997), H. 5}, isbn = {0018-9456}, pages = {1120 -- 1127}, year = {1997}, language = {en} } @article{Heuermann1995, author = {Heuermann, Holger}, title = {LZY: A Self-Calibration Approach in Competition to the LRM Method for On-Wafer Measurements}, pages = {129 -- 136}, year = {1995}, language = {en} } @article{HeuermannStolleSchiek1995, author = {Heuermann, Holger and Stolle, Reinhard and Schiek, Burkhard}, title = {Auswertemethoden zur Praezisions-Entfernungsmessung mit FMCW-Systemen und deren Anwendung im Mikrowellenbereich}, series = {tm - Technisches Messen. 62. 1995 (1995), H. 2}, journal = {tm - Technisches Messen. 62. 1995 (1995), H. 2}, pages = {66 -- 73}, year = {1995}, language = {de} } @article{HeuermannSadeghfam2009, author = {Heuermann, Holger and Sadeghfam, Arash}, title = {Enhanced system architecture for rugged wide band data transmission / Sadeghfam, A. ; Heuermann, H.}, series = {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}, journal = {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}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-2-87487-014-9}, pages = {347 -- 350}, year = {2009}, language = {en} } @book{Heuermann2023, author = {Heuermann, Holger}, title = {Hochfrequenztechnik. Komponenten und Mess-, Funk-, RFID- sowie Lokalisierungssysteme}, edition = {4}, publisher = {Springer Fachmedien}, address = {Wiesbaden}, isbn = {978-3-658-37825-7 (Print)}, pages = {XV, 453 Seiten}, year = {2023}, abstract = {Dieses Lehr- und Fachbuch vermittelt anschaulich die Grundlagen der HF-Technik, gibt konkrete Beschreibungen f{\"u}r den Entwurf von linearen Komponenten aus Bauteilen wie auch Leitungen f{\"u}r High-Speed- und HF-Schaltungen. Dem Leser wird vermittelt, wie Bauteile modelliert und Schaltungen synthetisiert und optimiert werden. Mit Hilfe frei verf{\"u}gbarer Simulationssoftware k{\"o}nnen GHz-Schaltungen selbst entwickelt werden. Viele {\"U}bungsbeispiele erm{\"o}glichen die Eigenkontrolle des Wissensstandes. Weiterhin werden komplexe nichtlineare Komponenten wie Hochfrequenzmischer, Oszillatoren und Synthesegeneratoren in ihrer Funktionalit{\"a}t dargestellt. Die neuen Mixed-Mode-Streuparameter sowie deren Leitungs- und Schaltungstechnik f{\"u}r Anwendungen der schnellen Digital- und der modernen HF-Technik sind ausf{\"u}hrlich beschrieben. Es wird auf Systeme f{\"u}r folgende Bereiche eingegangen: Streuparametermesstechnik, verschiedene Funktechniken, UHF-RFID und Lokalisierung- und Ortung. Dem Leser wird somit erm{\"o}glicht, komplexe GHz-Schaltungen insbesondere mit Halbleiter-, SMD- und LTCC-Schaltungen zu entwickeln.}, language = {de} } @article{HueningHeuermannWacheetal.2018, author = {H{\"u}ning, Felix and Heuermann, Holger and Wache, Franz-Josef and Jajo, Rami Audisho}, title = {A new wireless sensor interface using dual-mode radio}, series = {Journal of Sensors and Sensor Systems : JSSS}, volume = {Volume 7}, journal = {Journal of Sensors and Sensor Systems : JSSS}, number = {2}, publisher = {Copernicus Publ.}, address = {G{\"o}ttingen}, doi = {10.5194/jsss-7-507-2018}, pages = {507 -- 515}, year = {2018}, abstract = {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.}, language = {en} } @article{HoffmannUhlCeblinetal.2022, author = {Hoffmann, Andreas and Uhl, Matthias and Ceblin, Maximilian and Rohrbach, Felix and Bansmann, Joachim and Mallah, Marcel and Heuermann, Holger and Jacob, Timo and Kuehne, Alexander J.C.}, title = {Atmospheric pressure plasma-jet treatment of PAN-nonwovens—carbonization of nanofiber electrodes}, series = {C - Journal of Carbon Research}, volume = {8}, journal = {C - Journal of Carbon Research}, number = {3}, publisher = {MDPI}, address = {Basel}, issn = {2311-5629}, doi = {10.3390/c8030033}, pages = {8 Seiten}, year = {2022}, abstract = {Carbon nanofibers are produced from dielectric polymer precursors such as polyacrylonitrile (PAN). Carbonized nanofiber nonwovens show high surface area and good electrical conductivity, rendering these fiber materials interesting for application as electrodes in batteries, fuel cells, and supercapacitors. However, thermal processing is slow and costly, which is why new processing techniques have been explored for carbon fiber tows. Alternatives for the conversion of PAN-precursors into carbon fiber nonwovens are scarce. Here, we utilize an atmospheric pressure plasma jet to conduct carbonization of stabilized PAN nanofiber nonwovens. We explore the influence of various processing parameters on the conductivity and degree of carbonization of the converted nanofiber material. The precursor fibers are converted by plasma-jet treatment to carbon fiber nonwovens within seconds, by which they develop a rough surface making subsequent surface activation processes obsolete. The resulting carbon nanofiber nonwovens are applied as supercapacitor electrodes and examined by cyclic voltammetry and impedance spectroscopy. Nonwovens that are carbonized within 60 s show capacitances of up to 5 F g⁻¹.}, language = {en} } @article{HeuermannHarzheimCronenbroeck2021, author = {Heuermann, Holger and Harzheim, Thomas and Cronenbroeck, Tobias}, title = {First SIMO harmonic radar based on the SFCW concept and the HR transfer function}, series = {Remote sensing}, volume = {13}, journal = {Remote sensing}, number = {24}, publisher = {MDPI}, address = {Basel}, issn = {2072-4292}, doi = {10.3390/rs13245088}, pages = {23 Seiten}, year = {2021}, abstract = {This paper presents a new SIMO radar system based on a harmonic radar (HR) stepped frequency continuous wave (SFCW) architecture. Simple tags that can be electronically individually activated and deactivated via a DC control voltage were developed and combined to form an MO array field. This HR operates in the entire 2.45 GHz ISM band for transmitting the illumination signal and receives at twice the stimulus frequency and bandwidth centered around 4.9 GHz. This paper presents the development, the basic theory of a HR system for the characterization of objects placed into the propagation path in-between the radar and the reflectors (similar to a free-space measurement with a network analyzer) as well as first measurements performed by the system. Further detailed measurement series will be made available later on to other researchers to develop AI and machine learning based signal processing routines or synthetic aperture radar algorithms for imaging, object recognition, and feature extraction. For this purpose, the necessary information is published in this paper. It is explained in detail why this SIMO-HR can be an attractive solution augmenting or replacing existing systems for radar measurements in production technology for material under test measurements and as a simplified MIMO system. The novel HR transfer function, which is a basis for researchers and developers for material characterization or imaging algorithms, is introduced and metrologically verified in a well traceable coaxial setup.}, language = {en} } @article{Heuermann1999, author = {Heuermann, Holger}, title = {Calibration procedures with series impedances and unknown lines simplify on-wafer measurements}, series = {IEEE transactions on microwave theory and techniques : MTT ; a publication of the IEEE Microwave Theory and Techniques Society. 47 (1999), H. 1}, journal = {IEEE transactions on microwave theory and techniques : MTT ; a publication of the IEEE Microwave Theory and Techniques Society. 47 (1999), H. 1}, isbn = {0018-9480}, pages = {1 -- 5}, year = {1999}, language = {en} } @article{HeuermannSchiek1995, author = {Heuermann, Holger and Schiek, B.}, title = {Error corrected impedance measurements with a network analyzer}, series = {IEEE transactions on instrumentation and measurement : IM / Institute of Electrical and Electronics Engineers, Instrumentation and Measurement Group. 44 (1995), H. 2}, journal = {IEEE transactions on instrumentation and measurement : IM / Institute of Electrical and Electronics Engineers, Instrumentation and Measurement Group. 44 (1995), H. 2}, isbn = {0018-9456}, pages = {295 -- 299}, year = {1995}, language = {en} }