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  - 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  - 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  - 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  - 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  - 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
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
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  - 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  - 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  - 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  - A 14 W SPST Switch with Four PIN-Diodes In a 0402-SMD-Package
Y1  - 2008
SN  - 978-3-8007-3086-5
N1  - Microwave Conference (GeMIC), 2008 German
SP  - 318
EP  - 321
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  - 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  - 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  - 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
T1  - Verringerung des Phasenrauschens von Oszillatoren durch Dual-Mode-Resonatoren
JF  - HF-Report. 20 (2006), H. 5-6
Y1  - 2006
SN  - 1431-827X
SP  - 43
EP  - 48
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
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  - 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  -