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  - 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  - 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  - 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  - 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
T1  - Multiport S-parameter calculation from two-port network analyzer measurements with or without switch matrix
JF  - ARFTG Conference, 2006 67th, San Francisco, CA
Y1  - 2006
SN  - 978-0-7803-9529-9
SP  - 219
EP  - 222
ER  - 
TY  - CHAP
A1  - Schopp, Christoph
A1  - Heuermann, Holger
A1  - Marso, Michel
T1  - Multiphysical Study of an Atmospheric Microwave Argon Plasma Jet
T2  - IEEE Transactions on Plasma Science
Y1  - 2017
U6  - http://dx.doi.org/10.1109/TPS.2017.2692735
SN  - 1939-9375
VL  - 45
IS  - 6
SP  - 932
EP  - 937
PB  - IEEE
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  - http://dx.doi.org/10.1109/TMTT.2007.902587
VL  - 55
IS  - 8
SP  - 1704
EP  - 1708
PB  - IEEE
CY  - New York
ER  - 
TY  - BOOK
A1  - Heuermann, Holger
T1  - Mikrowellentechnik: Feldsimulation, nichtlineare Schaltungstechnik, Komponenten und Subsysteme, Plasmatechnik, Antennen und Ausbreitung
Y1  - 2020
SN  - 978-3-658-29023-8 (eBook)
SN  - 978-3-658-29022-1 (Print)
U6  - http://dx.doi.org/10.1007/978-3-658-29023-8
N1  - auch gedruckt in der Bereichsbibliothek Eupener Str. unter der Signatur 21 YFD 12
PB  - Springer Vieweg
CY  - Wiesbaden
ER  - 
TY  - BOOK
A1  - Heuermann, Holger
T1  - Mikrowellentechnik : Feldsimulation, nichtlineare Schaltungstechnik, Komponenten und Subsysteme, Plasmatechnik, Antennen und Ausbreitung
N2  - Das Lehrbuch behandelt alle Aspekte, die den aktuellen Stand der GHz-Technik betreffen. Das Buch behandelt die verschiedenen numerischen Feldsimulationsverfahren. Mit vielen modernen Themen.
KW  - Elektrotechnik
KW  - Hochfrequenztechnik
KW  - Feldsimulation
KW  - Plasmatechnik
KW  - Antennen
Y1  - 2023
SN  - 978-3-658-41286-9
U6  - http://dx.doi.org/10.1007/978-3-658-41287-6
PB  - Springer Vieweg
CY  - Wiesbaden
ET  - 2. Auflage
ER  - 
TY  - BOOK
A1  - Heuermann, Holger
T1  - Mikrowellentechnik
Y1  - 2014
ET  - 4. Aufl.
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  - http://dx.doi.org/10.1109/TPS.2022.3183690
SN  - 1939-9375
IS  - Early Access
SP  - 1
EP  - 6
PB  - IEEE
ER  - 
TY  - CHAP
A1  - Heuermann, Holger
A1  - Finger, Torsten
ED  - Günther, Michael
T1  - Microwave Spark Plug for Very High-Pressure Conditions
T2  - Ignition systems for gasoline engines
Y1  - 2014
SP  - 269
EP  - 282
PB  - DCM Druck
CY  - Meckenheim
ER  - 
TY  - JOUR
A1  - Heuermann, Holger
T1  - Microwave On-Wafer Measurements with Activ Needle Probe Tips
Y1  - 1997
N1  - 47th ARFTG Conference digest : June 20 - 21, 1996, Moscone Convention Center, San Francisco, California / Automatic RF Techniques Group. [Publication chair: Ed Godshalk
SP  - 208
EP  - 214
ER  - 
TY  - JOUR
A1  - Heuermann, Holger
T1  - LZY: A Self-Calibration Approach in Competition to the LRM Method for On-Wafer Measurements
Y1  - 1995
N1  - 45th ARFTG Conference digest, Spring 1995 : [conference topic: Testing and design of RFIC'S], May 19, 1995, Orange County Convention Center, Orlando, Florida / Automatic RF Techniques Group. Publications chairman: Ed Godshalk;  ARFTG Conference digest ; 4
SP  - 129
EP  - 136
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  - 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
T1  - Leerläufe als postulierte Kalibrierstandards fuer Messungen auf planaren Schaltungen
JF  - tm - Technisches Messen. 64. 1997 (1997), H. 6
Y1  - 1997
SP  - 230
EP  - 237
ER  - 
TY  - BOOK
A1  - Heuermann, Holger
A1  - Simon, Sven
A1  - Ibrahim, Irfan
T1  - Konzeption und Realisierung eines spektralreinen vektoriellen Transmitters mit CMOS-Sigma-Delta-Synthesizern im 1-5 GHz-Bereich / Antragsteller: Fachhochschule Aachen ... Teilprojektleitung: Heuermann
Y1  - 2010
N1  - Förderkennzeichen BMBF 1733A05 - 1733305
PB  - Fachhochschule
CY  - Aachen
ER  - 
TY  - CHAP
A1  - Schopp, Christoph
A1  - Heuermann, Holger
A1  - Holtrup, S.
T1  - Investigation on efficacy optimization of RF-driven automotive D-lamps
T2  - 44th European Microwave Conference (EuMC),2014, Rome
Y1  - 2014
U6  - http://dx.doi.org/10.1109/EuMC.2014.6986645
SP  - 1154
EP  - 1157
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  - BOOK
A1  - Heuermann, Holger
T1  - Hochfrequenztechnik. Komponenten und Mess-, Funk-, RFID- sowie Lokalisierungssysteme
N2  - Dieses Lehr- und Fachbuch vermittelt anschaulich die Grundlagen der HF-Technik, gibt konkrete Beschreibungen für den Entwurf von linearen Komponenten aus Bauteilen wie auch Leitungen für High-Speed- und HF-Schaltungen. Dem Leser wird vermittelt, wie Bauteile modelliert und Schaltungen synthetisiert und optimiert werden. Mit Hilfe frei verfügbarer Simulationssoftware können GHz-Schaltungen selbst entwickelt werden. Viele Übungsbeispiele ermöglichen die Eigenkontrolle des Wissensstandes. Weiterhin werden komplexe nichtlineare Komponenten wie Hochfrequenzmischer, Oszillatoren und Synthesegeneratoren in ihrer Funktionalität dargestellt. Die neuen Mixed-Mode-Streuparameter sowie deren Leitungs- und Schaltungstechnik für Anwendungen der schnellen Digital- und der modernen HF-Technik sind ausführlich beschrieben. Es wird auf Systeme für folgende Bereiche eingegangen: Streuparametermesstechnik, verschiedene Funktechniken, UHF-RFID und Lokalisierung- und Ortung. Dem Leser wird somit ermöglicht, komplexe GHz-Schaltungen insbesondere mit Halbleiter-, SMD- und LTCC-Schaltungen zu entwickeln.
Y1  - 2023
SN  - 978-3-658-37825-7 (Print)
SN  - 978-3-658-37826-4 (eBook)
PB  - Springer Fachmedien
CY  - Wiesbaden
ET  - 4
ER  - 
TY  - BOOK
A1  - Heuermann, Holger
T1  - Hochfrequenztechnik. Komponenten für High-Speed- und Hochfrequenzschaltungen / 2., durchges. und erw. Aufl.
Y1  - 2009
SN  - 978-3-8348-0769-4
PB  - Vieweg + Teubner
CY  - Wiesbaden
ER  - 
TY  - BOOK
A1  - Heuermann, Holger
T1  - Hochfrequenztechnik : Lineare Komponenten hochintegrierter Hochfrequenzschaltungen
Y1  - 2005
SN  - 3-528-03980-9
PB  - Vieweg
CY  - Wiesbaden
ER  - 
TY  - JOUR
A1  - Heuermann, Holger
T1  - GSOLT: the calibration procedure for all multi-port vector network analyzers
JF  - IEEE MTT-S International Microwave Symposium digest : Philadelphia, Pennsylvania, 8 - 13 June 2003 ; [including: 2003 International Microwave Symposium digest, vol. 1-3, RF Integrated Circuit Symposium digest, Automatic RF Techniques Group Symposium digest . Vol. 3
Y1  - 2003
SN  - 0-780-37696-X
N1  - Nebent.: 2003 IEEE MTT-S International Microwave Symposium
SP  - 1815
EP  - 1818
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
T1  - Fehlerkorrigierte Mehrtormessungen für frequenzumsetzende Komponenten mit NonLin-S
JF  - HF-Report : Hochfrequenztechnik, Optoelektronik, Mikrowellentechnik, Kommunikationstechnik. 22 (2008), H. 4
Y1  - 2008
SN  - 1431-827X
SP  - 39
EP  - 44
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  - 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, 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  - Sadeghfam, A.
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  - CHAP
A1  - Ögun, Celal Mohan
A1  - Kling, Rainer
A1  - Heuermann, Holger
A1  - Gräser, Ulrich
A1  - Schopp, Christoph
T1  - Elektrodenlose quecksilberfreie Niederdrucklampen betrieben mit Mikrowellen
T2  - Licht 2014 [Elektronische Ressource] : Den Haag, Holland ; 21. Gemeinschaftstagung, 21. bis 24. September 2014 ; Tagungsband
Y1  - 2014
PB  - Nederlandse Stichting voor Verlichtingskunde
CY  - Ede
ER  - 
TY  - CHAP
A1  - Schopp, Christoph
A1  - Heuermann, Holger
T1  - Electrodeless low pressure lamp with bi-static matching at 2.45 GHz
T2  - 2013 European Microwave Conference (EuMC) , Nuremberg
Y1  - 2013
SN  - 978-1-4799-0264-4
SP  - 881
EP  - 884
PB  - IEEE
CY  - Piscataway, NJ
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  - 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
T1  - Dual mode radio: A new tranceiver architecture for UWB and 60 GHz-applications
JF  - European Conference on Wireless Technology, 2008. EuWiT 2008.
Y1  - 2008
SN  - 978-2-87487-008-8
SP  - 147
EP  - 150
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  - Schopp, Christoph
A1  - Rohrbach, Felix
A1  - Langer, Luc
A1  - Heuermann, Holger
T1  - Detection of welding wire length by active S11 measurement
JF  - IEEE Transactions on Plasma Science
N2  - A novel method to determine the extruded length of a metallic wire for a directed energy deposition (DED) process using a microwave (MW) plasma jet with a straight-through wire feed is presented. The method is based on the relative comparison of the measured frequency response obtained by the large-signal scattering parameter (Hot-S) technique. In the practical working range, repeatability of less than 6% for a nonactive plasma and 9% for the active plasma state is found. Measurements are conducted with a focus on a simple solution to decrease the processing time and reduce the integration time of the process into the existing hardware. It is shown that monitoring a single frequency for magnitude and phase changes is sufficient to achieve good accuracy. A combination of different measurement values to determine the length is possible. The applicability to different diameter of the same material is shown as well as a contact detection of the wire and metallic substrate.
KW  - Circuit simulation
KW  - Hot S-parameter
KW  - Modeling
KW  - Plasma
KW  - Plasma diagnostics
Y1  - 2024
U6  - http://dx.doi.org/10.1109/TPS.2024.3356659
SN  - 0093-3813 (Print)
SN  - 1939-9375 (Online)
IS  - Early Access
SP  - 1
EP  - 6
PB  - IEEE
ER  - 
TY  - CHAP
A1  - Sadeghfam, Arash
A1  - Sadeghi-Ahangar, A.
A1  - Elgamal, Abdelrahman
A1  - Heuermann, Holger
T1  - Design and Development of a Novel Self-Igniting Microwave Plasma Jet for Industrial Applications
T2  - IEEE MTT-S International Microwave Symposium Digest
Y1  - 2019
SN  - 978-172811309-8
SP  - 63
EP  - 66
ER  - 
TY  - CHAP
A1  - Elgamal, Abdelrahman
A1  - Heuermann, Holger
T1  - Design and Development of a Hot S-Parameter Measurement System for Plasma and Magnetron Applications
T2  - 2020 German Microwave Conference (GeMiC), Cottbus, Germany, 2020
Y1  - 2020
SN  - 978-3-9820397-1-8
SP  - 124
EP  - 127
ER  - 
TY  - CHAP
A1  - Stephan, Achim
A1  - Heuermann, Holger
A1  - Prantner, Michael
T1  - Cutting human tissue with novel atmospheric-pressure microwave plasma jet
T2  - 46th European Microwave Conference (EuMC)
Y1  - 2016
SN  - 978-2-87487-043-9
U6  - http://dx.doi.org/10.1109/EuMC.2016.7824490
SP  - 902
EP  - 905
PB  - IEEE
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  - 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  - http://dx.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  - Schopp, Christoph
A1  - Doll, Timo
A1  - Gräser, Ulrich
A1  - Harzheim, Thomas
A1  - Heuermann, Holger
A1  - Kling, Rainer
A1  - Marso, Michael
T1  - Capacitively Coupled High-Pressure Lamp Using Coaxial Line Networks
JF  - IEEE Transactions on Microwave Theory and Techniques
N2  - This paper describes the development of a capacitively coupled high-pressure lamp with input power between 20 and 43 W at 2.45 GHz, using a coaxial line network. Compared with other electrodeless lamp systems, no cavity has to be used and a reduction in the input power is achieved. Therefore, this lamp is an alternative to the halogen incandescent lamp for domestic lighting. To serve the demands of domestic lighting, the filling of the lamp is optimized over all other resulting requirements, such as high efficacy at low induced powers and fast startups. A workflow to develop RF-driven plasma applications is presented, which makes use of the hot S-parameter technique. Descriptions of the fitting process inside a circuit and FEM simulator are given. Results of the combined ignition and operation network from simulations and measurements are compared. An initial prototype is built and measurements of the lamp's lighting properties are presented along with an investigation of the efficacy optimizations using large signal amplitude modulation. With this lamp, an efficacy of 135 lmW -1 is achieved.
Y1  - 2016
U6  - http://dx.doi.org/10.1109/TMTT.2016.2600326
SN  - 0018-9480
VL  - 64
IS  - 10
SP  - 3363
EP  - 3368
PB  - IEEE
CY  - New York, NY
ER  - 
TY  - JOUR
A1  - Heuermann, Holger
T1  - Calibration procedures with series impedances and unknown lines simplify on-wafer measurements
JF  - IEEE transactions on microwave theory and techniques : MTT ; a publication of the IEEE Microwave Theory and Techniques Society. 47 (1999), H. 1
Y1  - 1999
SN  - 0018-9480
SP  - 1
EP  - 5
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
T1  - Calibration of a Network Analyzer Without a Thru Connection for Nonlinear and Multiport Measurements
JF  - IEEE Transactions on Microwave Theory and Techniques. 56 (2008), H. 11, 1
Y1  - 2008
SN  - 0018-9480
SP  - 2505
EP  - 2510
ER  - 
TY  - PAT
A1  - Heuermann, Holger
A1  - Hüning, Felix
A1  - Wache, Franz-Josef
T1  - Bussystem sowie Kommunikationsverfahren
N2  - Die Erfindung betrifft ein Bussystem enthaltend Busleitungen, an denen eine Anzahl von Busteilnehmern über einen Transceiver anschließbar sind, wobei der Transceiver eine bidirektionale Kommunikation zwischen mindestens zwei Busteilnehmern bewirkt, wobei auf einer busabgewandten Seite des Transceivers sich an denselben eine Zwischenbrückeneinheit anschließt, die mindestens zwei Sender-/Empfänger-Paare enthaltend jeweils einen Sender und einen Empfänger aufweist, wobei der Sender einen Senderoszillator, eine Amplituden- und/oder Phasen- und/oder Frequenzmodulator sowie eine Antenne aufweist und wobei der Empfänger einen Mischer aufweisenden Demodulator sowie eine Antenne aufweist, wobei ein erstes Sender-/Empfänger-Paar über eine Funkschnittstelle mit dem zweiten Sender-/Empfänger-Paar miteinander gekoppelt sind.
Y1  - 2018
N1  - Patent WO002018046055A1
ER  -