@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}
}
@book{Heuermann2014,
  author    = {Heuermann, Holger},
  title     = {Mikrowellentechnik},
  edition   = {4. Aufl.},
  pages     = {[Elektronische Ressource] IX, 225 S. ; graph. Darst.},
  year      = {2014},
  language  = {de}
}
@book{Heuermann2023,
  author    = {Heuermann, Holger},
  title     = {Mikrowellentechnik : Feldsimulation, nichtlineare Schaltungstechnik, Komponenten und Subsysteme, Plasmatechnik, Antennen und Ausbreitung},
  edition   = {2. Auflage},
  publisher = {Springer Vieweg},
  address   = {Wiesbaden},
  isbn      = {978-3-658-41286-9},
  doi       = {10.1007/978-3-658-41287-6},
  pages     = {XVI, 394 Seiten},
  year      = {2023},
  abstract  = {Das Lehrbuch behandelt alle Aspekte, die den aktuellen Stand der GHz-Technik betreffen. Das Buch behandelt die verschiedenen numerischen Feldsimulationsverfahren. Mit vielen modernen Themen.},
  language  = {de}
}
@book{Heuermann2020,
  author    = {Heuermann, Holger},
  title     = {Mikrowellentechnik: Feldsimulation, nichtlineare Schaltungstechnik, Komponenten und Subsysteme, Plasmatechnik, Antennen und Ausbreitung},
  publisher = {Springer Vieweg},
  address   = {Wiesbaden},
  isbn      = {978-3-658-29023-8 (eBook)},
  doi       = {10.1007/978-3-658-29023-8},
  pages     = {Online-Ressource (XIV, 385 S. 374 Abb., 22 Abb. in Farbe)},
  year      = {2020},
  language  = {de}
}
@article{HeuermannErkens2007,
  author    = {Heuermann, Holger and Erkens, H.},
  title     = {Mixed-Mode Chain Scattering Parameters: Theory and Verification},
  series = {IEEE Transactions on Microwave Theory and Techniques},
  volume    = {55},
  journal   = {IEEE Transactions on Microwave Theory and Techniques},
  number    = {8},
  publisher = {IEEE},
  address   = {New York},
  isbn      = {0018-9480},
  doi       = {10.1109/TMTT.2007.902587},
  pages     = {1704 -- 1708},
  year      = {2007},
  abstract  = {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.},
  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{Heuermann2006,
  author    = {Heuermann, Holger},
  title     = {Multiport S-parameter calculation from two-port network analyzer measurements with or without switch matrix},
  series = {ARFTG Conference, 2006 67th, San Francisco, CA},
  journal   = {ARFTG Conference, 2006 67th, San Francisco, CA},
  isbn      = {978-0-7803-9529-9},
  pages     = {219 -- 222},
  year      = {2006},
  language  = {en}
}
@article{HeuermannStolleSchiek1995,
  author    = {Heuermann, Holger and Stolle, Reinhard and Schiek, Burkhard},
  title     = {Neuartige Algorithmen fuer die Mikrowellen-Entfernungsmessung},
  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. 1995 (1995)},
  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. 1995 (1995)},
  pages     = {817 -- 834},
  year      = {1995},
  language  = {de}
}
@article{HeuermannSchiek1993,
  author    = {Heuermann, Holger and Schiek, Burkhard},
  title     = {Neue Kalibrierverfahren fuer on-wafer-Messungen},
  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. 37. 1993 (1993)},
  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. 37. 1993 (1993)},
  pages     = {195 -- 204},
  year      = {1993},
  language  = {de}
}
@article{HeuermannStolleSchiek1995,
  author    = {Heuermann, Holger and Stolle, Reinhard and Schiek, Burkhard},
  title     = {Novel Algorithms for FMCW Range Finding with Microwaves. Stolle, R.; Heuermann, H.; Schiek, B.},
  pages     = {129 -- 132},
  year      = {1995},
  language  = {en}
}