@article{HeuermannErkens2006, author = {Heuermann, Holger and Erkens, H.}, title = {Novel RF switch concepts for differential wireless communications frontends. Erkens, H.; Heuermann, H.}, series = {IEEE Transactions on Microwave Theory and Techniques. 54 (2006), H. 6, Part 1}, journal = {IEEE Transactions on Microwave Theory and Techniques. 54 (2006), H. 6, Part 1}, isbn = {0018-9480}, pages = {2376 -- 2382}, year = {2006}, language = {en} } @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} } @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} } @article{HeuermannBaumannFauthetal.1994, author = {Heuermann, Holger and Baumann, F.-M. and Fauth, G. and Albert, M.}, title = {Results of Network Analyzer Measurements with Leakage Errors Corrected with the TMS-15-Term Procedure}, series = {On-Line Moisture Analysis of Raw Coal}, journal = {On-Line Moisture Analysis of Raw Coal}, pages = {1361 -- 1364}, year = {1994}, language = {en} } @article{Heuermann1996, author = {Heuermann, Holger}, title = {Sure Methods of On-Wafer Scattering Parameter Measurements with Self-Calibration Procedures}, pages = {136 -- 145}, year = {1996}, language = {en} } @article{Heuermann2003, author = {Heuermann, Holger}, title = {GSOLT: the calibration procedure for all multi-port vector network analyzers}, series = {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}, journal = {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}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {0-780-37696-X}, pages = {1815 -- 1818}, year = {2003}, language = {en} } @article{Heuermann1997, author = {Heuermann, Holger}, title = {Microwave On-Wafer Measurements with Activ Needle Probe Tips}, pages = {208 -- 214}, year = {1997}, 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{Heuermann2006, author = {Heuermann, Holger}, title = {Verringerung des Phasenrauschens von Oszillatoren durch Dual-Mode-Resonatoren}, series = {HF-Report. 20 (2006), H. 5-6}, journal = {HF-Report. 20 (2006), H. 5-6}, isbn = {1431-827X}, pages = {43 -- 48}, year = {2006}, language = {en} } @article{Heuermann2008, author = {Heuermann, Holger}, title = {A 14 W SPST Switch with Four PIN-Diodes In a 0402-SMD-Package}, isbn = {978-3-8007-3086-5}, pages = {318 -- 321}, year = {2008}, language = {en} } @article{Heuermann2004, author = {Heuermann, Holger}, title = {A Synthesis Technique for Mono- and Mixed-Mode Symmetrical Filter}, series = {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}, journal = {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}, publisher = {Horizon House Publ}, address = {London}, isbn = {1-580-53992-0}, pages = {309 -- 312}, year = {2004}, 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{Heuermann2008, author = {Heuermann, Holger}, title = {Dual mode radio: A new tranceiver architecture for UWB and 60 GHz-applications}, series = {European Conference on Wireless Technology, 2008. EuWiT 2008.}, journal = {European Conference on Wireless Technology, 2008. EuWiT 2008.}, isbn = {978-2-87487-008-8}, pages = {147 -- 150}, year = {2008}, language = {en} } @article{Heuermann2008, author = {Heuermann, Holger}, title = {Calibration of a Network Analyzer Without a Thru Connection for Nonlinear and Multiport Measurements}, series = {IEEE Transactions on Microwave Theory and Techniques. 56 (2008), H. 11, 1}, journal = {IEEE Transactions on Microwave Theory and Techniques. 56 (2008), H. 11, 1}, isbn = {0018-9480}, pages = {2505 -- 2510}, year = {2008}, 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} } @inproceedings{HessLuanSchwarteetal.2001, author = {Hess, Holger and Luan, Xuming and Schwarte, Rudolf and Zhang, Zhigang and Xu, Zhanping and Heinol, Horst-Guenther and Buxbaum, Bernd and Ringbeck, Thorsten}, title = {Three-dimensional intelligent sensing based on the PMD technology}, series = {Sensors, Systems, and Next-Generation Satellites V : 17 - 20 September 2001, Toulouse, France. - (SPIE proceedings series ; 4540)}, booktitle = {Sensors, Systems, and Next-Generation Satellites V : 17 - 20 September 2001, Toulouse, France. - (SPIE proceedings series ; 4540)}, editor = {Fujisada, Hiroyuki}, publisher = {SPIE}, address = {Bellingham, Wash.}, isbn = {0-8194-4265-8}, issn = {0038-7355}, pages = {482 -- 488}, year = {2001}, language = {en} } @inproceedings{HerzwurmPietsch2013, author = {Herzwurm, Georg and Pietsch, Wolfram}, title = {Introduction of RePriCo'13}, series = {19th International Working Conference on Requirements Engineering: Foundation for Software Quality (REFSQ 2013) : proceedings of the REFSQ 2013 Workshops CreaRE, IWSPM, and RePriCo, the REFSQ 2013 Empirical Track (Empirical Live Experiment and Empirical Research Fair), the REFSQ 2013 Doctoral Symposium, and the REFSQ 2013 Poster Session. ICB-research report. No. 56}, booktitle = {19th International Working Conference on Requirements Engineering: Foundation for Software Quality (REFSQ 2013) : proceedings of the REFSQ 2013 Workshops CreaRE, IWSPM, and RePriCo, the REFSQ 2013 Empirical Track (Empirical Live Experiment and Empirical Research Fair), the REFSQ 2013 Doctoral Symposium, and the REFSQ 2013 Poster Session. ICB-research report. No. 56}, publisher = {Duisburg-Essen}, address = {Univ.}, issn = {ISSN 1860-2770 (Print ) ; ISSN 1866-5101 (Online)}, pages = {103 -- 105}, year = {2013}, language = {en} } @inproceedings{HerzwurmPietsch2008, author = {Herzwurm, Georg and Pietsch, Wolfram}, title = {Guidelines for the analysis of IT business models and strategic positioning of IT-products}, series = {Second International Workshop on Software Product Management : IWSPM '08 : Barcelona, Catalunya, 09.09.2008}, booktitle = {Second International Workshop on Software Product Management : IWSPM '08 : Barcelona, Catalunya, 09.09.2008}, publisher = {IEEE}, address = {Piscataway, NJ}, organization = {Institute of Electrical and Electronics Engineers}, isbn = {978-1-4244-4083-2 (Print) ; 978-0-7695-3625-5 (E-Book)}, doi = {10.1109/IWSPM.2008.3}, pages = {1 -- 8}, year = {2008}, language = {en} } @article{HerzwurmKramsPietschetal.2012, author = {Herzwurm, Georg and Krams, Benedikt and Pietsch, Wolfram and Schockert, Sixten}, title = {Report from the 3rd international workshop on requirements prioritization for customer oriented software development (RePriCo'12)}, series = {ACM SIGSOFT Software Engineering Notes}, volume = {37}, journal = {ACM SIGSOFT Software Engineering Notes}, number = {4}, publisher = {Association for Computing Machinery}, address = {New York}, issn = {0163-5948}, doi = {10.1145/2237796.2237817}, pages = {32 -- 34}, year = {2012}, abstract = {Prioritization is an essential task within requirements engineering to cope with complexity and to establish focus properly. The 3rd Workshop on Requirements Prioritization for customer oriented Software Development (RePriCo'12) focused on requirements prioritization and adjacent themes in the context of customer oriented development of bespoke and standard software. Five submissions have been accepted for the proceedings and for presentation. The report summarizes and points out key findings.}, language = {en} } @article{HerzogPietrzykShahetal.2010, author = {Herzog, Hans and Pietrzyk, Uwe and Shah, N. Jon and Ziemons, Karl}, title = {The current state, challenges and perspectives of MR-PET}, series = {Neuroimage}, volume = {49}, journal = {Neuroimage}, number = {3}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1053-8119}, doi = {10.1016/j.neuroimage.2009.10.036}, pages = {2072 -- 2082}, year = {2010}, abstract = {Following the success of PET/CT during the last decade and the recent increasing proliferation of SPECT/CT, another hybrid imaging instrument has been gaining more and more interest: MR-PET. First combined, simultaneous PET and MR studies carried out in small animals demonstrated the feasibility of the new approach. Concurrently, some prototypes of an MR-PET scanner for simultaneous human brain studies have been built, their performance is being tested and preliminary applications have already been shown. Through this pioneering work, it has become clear that advances in the detector design are necessary for further optimization. Recently, the different issues related to the present state and future prospects of MR-PET were presented and discussed during an international 2-day workshop at the Forschungszentrum J{\"u}lich, Germany, held after, and in conjunction with, the 2008 IEEE Nuclear Science Symposium and Medical Imaging Conference in Dresden, Germany on October 27-28, 2008. The topics ranged from small animal MR-PET imaging to human MR-BrainPET imaging, new detector developments, challenges/opportunities for ultra-high field MR-PET imaging and considerations of possible future research and clinical applications. This report presents a critical summary of the contributions made to the workshop.}, language = {en} }