@inproceedings{SadeghfamSadeghiAhangarElgamaletal.2019, author = {Sadeghfam, Arash and Sadeghi-Ahangar, A. and Elgamal, Abdelrahman and Heuermann, Holger}, title = {Design and Development of a Novel Self-Igniting Microwave Plasma Jet for Industrial Applications}, series = {IEEE MTT-S International Microwave Symposium Digest}, booktitle = {IEEE MTT-S International Microwave Symposium Digest}, isbn = {978-172811309-8}, pages = {63 -- 66}, year = {2019}, language = {en} } @inproceedings{HeuermannSadeghfam2016, author = {Heuermann, Holger and Sadeghfam, Arash}, title = {Analog Amplitude-Locked Loop Circuit to Support RF Energy Solutions}, series = {IEEE MTT-S International Microwave Symposium Digest}, booktitle = {IEEE MTT-S International Microwave Symposium Digest}, isbn = {978-150900698-4}, doi = {10.1109/MWSYM.2016.7540092}, pages = {4 Seiten}, year = {2016}, language = {de} } @inproceedings{HeuermannSadeghfam2015, author = {Heuermann, Holger and Sadeghfam, Arash}, title = {Universaler Plasmajet f{\"u}r verschiedene Behandlungsschritte der Klebetechnik}, series = {Tagungsband / 15. Kolloquium Gemeinsame Forschung in der Klebtechnik : 3. und 4. M{\"a}rz 2015, Maternushaus, K{\"o}ln / DECHEMA}, booktitle = {Tagungsband / 15. Kolloquium Gemeinsame Forschung in der Klebtechnik : 3. und 4. M{\"a}rz 2015, Maternushaus, K{\"o}ln / DECHEMA}, address = {K{\"o}ln}, pages = {85 -- 87}, year = {2015}, language = {de} } @article{HoltrupSadeghfamHeuermannetal.2014, author = {Holtrup, S. and Sadeghfam, Arash and Heuermann, Holger and Awakowicz, P.}, title = {Characterization and optimization technique for microwave-driven high-intensity discharge lamps using hot S-parameters}, series = {IEEE transactions on microwave theories and techniques}, volume = {62}, journal = {IEEE transactions on microwave theories and techniques}, number = {10}, publisher = {IEEE}, address = {New York}, issn = {0018-9480}, doi = {10.1109/TMTT.2014.2342652}, pages = {2471 -- 2480}, year = {2014}, abstract = {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.}, language = {en} } @inproceedings{HeuermannSadeghfamFinger2013, author = {Heuermann, Holger and Sadeghfam, Arash and Finger, Torsten}, title = {Alternative ignition system based on microwave plasma}, series = {Advanced ignition systems for gasoline engines : [Vortr{\"a}ge der 1st International Conference Advanced Ignition Systems for Gasoline Engines - 1. Internationale Tagung Z{\"u}ndsysteme f{\"u}r Ottomotoren, 12.-13. November 2012, Berlin]}, booktitle = {Advanced ignition systems for gasoline engines : [Vortr{\"a}ge der 1st International Conference Advanced Ignition Systems for Gasoline Engines - 1. Internationale Tagung Z{\"u}ndsysteme f{\"u}r Ottomotoren, 12.-13. November 2012, Berlin]}, publisher = {Expert-Verl.}, address = {Renningen}, organization = {International Conference Advanced Ignition Systems for Gasoline Engines <1, 2012, Berlin>}, isbn = {9783816931904}, pages = {95 -- 103}, year = {2013}, language = {en} } @article{HeuermannHillebrandSadeghfam2008, author = {Heuermann, Holger and Hillebrand, J{\"u}rgen and Sadeghfam, Arash}, title = {Novel Concept of a Digital SigmaDelta-PLL-Phase-Shift-Modulator / Hillebrand, J{\"u}rgen ; Sadeghfam, Arash ; Heuermann, Holger}, isbn = {978-3-8007-3086-5}, pages = {123 -- 126}, year = {2008}, language = {en} } @article{HeuermannSadeghfam2008, author = {Heuermann, Holger and Sadeghfam, Arash}, title = {Electrically tunable bandpass filter with integrated carrier suppression for UHF RFID systems / Sadeghfam, Arash ; Heuermann, Holger}, series = {European Microwave Conference, 2008, EuMC 2008, 38th}, journal = {European Microwave Conference, 2008, EuMC 2008, 38th}, isbn = {978-2-87487-006-4}, pages = {1727 -- 1730}, year = {2008}, language = {en} } @article{HeuermannSadeghfam2007, author = {Heuermann, Holger and Sadeghfam, Arash}, title = {On the design of multimode integrated circuits in multilayered processes / Sadeghfam, A. ; Heuermann, H.}, series = {European Microwave Conference, 2007, 9-12 Oct. 2007}, journal = {European Microwave Conference, 2007, 9-12 Oct. 2007}, isbn = {978-2-87487-001-9}, pages = {516 -- 519}, year = {2007}, language = {en} } @article{HeuermannSadeghfam2008, author = {Heuermann, Holger and Sadeghfam, Arash}, title = {Electrically tunable bandpass filter with integrated carrier suppression for UHF RFID systems / Sadeghfam, Arash ; Heuermann, Holger}, 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 = {306 -- 309}, year = {2008}, language = {en} } @article{HeuermannPetersSchmitzetal.2005, author = {Heuermann, Holger and Peters, N. and Schmitz, T. and Sadeghfam, Arash}, title = {Concept of Balanced Antennas with Load-Invariant Base Impedance Using a Two Element LC-Coupler. Peters, N., Schmitz, Th., Sadeghfam, A., Heuermann, H.}, series = {Proceedings of the European microwave association : journal of the European microwave association}, journal = {Proceedings of the European microwave association : journal of the European microwave association}, publisher = {PLUS}, address = {Pisa}, pages = {117 -- 122}, year = {2005}, language = {en} }