TY  - JOUR
A1  - Heuermann, Holger
T1  - A Synthesis Technique for Mono- and Mixed-Mode Symmetrical Filter
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  - 309
EP  - 312
PB  - Horizon House Publ
CY  - London
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
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
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
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  - 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
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  - 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  - http://dx.doi.org/10.1109/TMTT.2007.902587
VL  - 55
IS  - 8
SP  - 1704
EP  - 1708
PB  - IEEE
CY  - New York
ER  -