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Jutta Kühn AlGaN/GaN-HEMT Power Amplifiers with Optimized Power-Added Efficiency for X-Band Applications Karlsruher Forschungsberichte aus dem Institut für Hochfrequenztechnik und Elektronik Herausgeber: Prof. Dr.-Ing. Thomas Zwick Band 62 AlGaN/GaN-HEMT Power Amplifiers with Optimized Power-Added Efficiency for X-Band Applications von Jutta Kühn Dissertation, Karlsruher Institut für Technologie Fakultät für Elektrotechnik und Informationstechnik, 2010 Impressum Karlsruher Institut für Technologie (KIT) KIT Scientific Publishing Straße am Forum 2 D-76131 Karlsruhe www.ksp.kit.edu KIT – Universität des Landes Baden-Württemberg und nationales Forschungszentrum in der Helmholtz-Gemeinschaft Diese Veröffentlichung ist im Internet unter folgender Creative Commons-Lizenz publiziert: http://creativecommons.org/licenses/by-nc-nd/3.0/de/ KIT Scientific Publishing 2011 Print on Demand ISSN 1868-4696 ISBN 978-3-86644-615-1 Vorwort des Herausgebers Solid state amplifiers are the key components of modern radar and wireless communication systems. The performance of the overall systems, especially at the transmitting side, is limited by the available output power of the last amplifier in the chain/line. This becomes more evident when the operation moves towards millimeter wave frequencies. The reason for this limitation is due to the scaling down of semiconductor devices in order to achieve high- er operating frequencies but at the same time compromises the power hand- ling capability. As such, the use of new semiconductor materials becomes the focus of recent worldwide research. The current most promising technology is the gallium nitride (GaN), which offers high power density, high efficien- cy and exceptional wideband performance as compared to existing technolo- gies such as silicon (SI) or gallium arsenide (GaAs). A key advantage to gallium nitride is its ability to maintain high operating voltages at higher frequency ranges. This is due to the unique combination of high bandgap energy resul- ting in higher device tolerance for high maximum field strengths, as well as the high speed properties of electron mobility and saturation velocity. The- se advantages thus distinguish the GaN from other competing technologies in terms of power generation in operating frequencies of 10 GHz and above. Besides the available output power the efficiency plays an important role in any device with limited energy and/or heat dissipation, which is the case for nearly all systems. Since up to now the power added efficiencies of GaN de- vices at GHz frequencies are still below what GaAs can offer, this efficiency factor becomes an important research task for the scientific community. The dissertation of Dr. Jutta Kühn focuses on the design of AlGaN/GaN HEMT high-power amplifiers in Class-AB operation for X-band (8-12GHz) applications with particular emphasis on an optimized power added efficiency (PAE). In this work a PAE enhancement at the device level with improved design techniques achieved output power levels of several watts and PAEs above 50%. The presen- ted work of Ms. Kühn is a fundamental basis for future research in the field of AlGaN/GaN-HEMT Power Amplifiers. The results will draw attention worldwide and entail more relevant research. I wish her all the best for her future. Prof. Dr.-Ing. Thomas Zwick - director of the IHE - Forschungsberichte aus dem Institut für Höchstfrequenztechnik und Elektronik (IHE) der Universität Karlsruhe (TH) (ISSN 0942-2935) Herausgeber: Prof. Dr.-Ing. Dr. h.c. Dr.-Ing. E.h. Werner Wiesbeck Band 1 Daniel Kähny Modellierung und meßtechnische Verifikation polarimetrischer, mono- und bistatischer Radarsignaturen und deren Klassifi- zierung (1992) Band 2 Eberhardt Heidrich Theoretische und experimentelle Charakterisierung der polari- metrischen Strahlungs- und Streueigenschaften von Antennen (1992) Band 3 Thomas Kürner Charakterisierung digitaler Funksysteme mit einem breit- bandigen Wellenausbreitungsmodell (1993) Band 4 Jürgen Kehrbeck Mikrowellen-Doppler-Sensor zur Geschwindigkeits- und Weg- messung - System-Modellierung und Verifikation (1993) Band 5 Christian Bornkessel Analyse und Optimierung der elektrodynamischen Eigenschaften von EMV-Absorberkammern durch numerische Feldberechnung (1994) Band 6 Rainer Speck Hochempfindliche Impedanzmessungen an Supraleiter / Fest- elektrolyt-Kontakten (1994) Band 7 Edward Pillai Derivation of Equivalent Circuits for Multilayer PCB and Chip Package Discontinuities Using Full Wave Models (1995) Band 8 Dieter J. Cichon Strahlenoptische Modellierung der Wellenausbreitung in urbanen Mikro- und Pikofunkzellen (1994) Band 9 Gerd Gottwald Numerische Analyse konformer Streifenleitungsantennen in mehrlagigen Zylindern mittels der Spektralbereichsmethode (1995) Forschungsberichte aus dem Institut für Höchstfrequenztechnik und Elektronik (IHE) der Universität Karlsruhe (TH) (ISSN 0942-2935) Band 10 Norbert Geng Modellierung der Ausbreitung elektromagnetischer Wellen in Funksystemen durch Lösung der parabolischen Approximation der Helmholtz-Gleichung (1996) Band 11 Torsten C. Becker Verfahren und Kriterien zur Planung von Gleichwellennetzen für den Digitalen Hörrundfunk DAB (Digital Audio Broadcasting) (1996) Band 12 Friedhelm Rostan Dual polarisierte Microstrip-Patch-Arrays für zukünftige satelli- tengestützte SAR-Systeme (1996) Band 13 Markus Demmler Vektorkorrigiertes Großsignal-Meßsystem zur nichtlinearen Cha- rakterisierung von Mikrowellentransistoren (1996) Band 14 Andreas Froese Elektrochemisches Phasengrenzverhalten von Supraleitern (1996) Band 15 Jürgen v. Hagen Wide Band Electromagnetic Aperture Coupling to a Cavity: An In- tegral Representation Based Model (1997) Band 16 Ralf Pötzschke Nanostrukturierung von Festkörperflächen durch elektro- chemische Metallphasenbildung (1998) Band 17 Jean Parlebas Numerische Berechnung mehrlagiger dualer planarer Antennen mit koplanarer Speisung (1998) Band 18 Frank Demmerle Bikonische Antenne mit mehrmodiger Anregung für den räumli- chen Mehrfachzugriff (SDMA) (1998) Band 19 Eckard Steiger Modellierung der Ausbreitung in extrakorporalen Therapien ein- gesetzter Ultraschallimpulse hoher Intensität (1998)

Description:
high-power amplifiers in Class-AB operation for X-band (8-12GHz) applications with particular emphasis on an optimized power added efficiency (PAE). In this work a PAE enhancement at the device level den Digitalen Hörrundfunk DAB (Digital Audio Broadcasting). (1996). Band 12 Friedhelm Rostan.
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264 Pages·2011·8.25 MB·English
by  Jutta Kühn
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Jutta Kühn AlGaN/GaN-HEMT Power Amplifiers with Optimized Power-Added Efficiency for X-Band Applications Karlsruher Forschungsberichte aus dem Institut für Hochfrequenztechnik und Elektronik Herausgeber: Prof. Dr.-Ing. Thomas Zwick Band 62 AlGaN/GaN-HEMT Power Amplifiers with Optimized Power-Added Efficiency for X-Band Applications von Jutta Kühn Dissertation, Karlsruher Institut für Technologie Fakultät für Elektrotechnik und Informationstechnik, 2010 Impressum Karlsruher Institut für Technologie (KIT) KIT Scientific Publishing Straße am Forum 2 D-76131 Karlsruhe www.ksp.kit.edu KIT – Universität des Landes Baden-Württemberg und nationales Forschungszentrum in der Helmholtz-Gemeinschaft Diese Veröffentlichung ist im Internet unter folgender Creative Commons-Lizenz publiziert: http://creativecommons.org/licenses/by-nc-nd/3.0/de/ KIT Scientific Publishing 2011 Print on Demand ISSN 1868-4696 ISBN 978-3-86644-615-1 Vorwort des Herausgebers Solid state amplifiers are the key components of modern radar and wireless communication systems. The performance of the overall systems, especially at the transmitting side, is limited by the available output power of the last amplifier in the chain/line. This becomes more evident when the operation moves towards millimeter wave frequencies. The reason for this limitation is due to the scaling down of semiconductor devices in order to achieve high- er operating frequencies but at the same time compromises the power hand- ling capability. As such, the use of new semiconductor materials becomes the focus of recent worldwide research. The current most promising technology is the gallium nitride (GaN), which offers high power density, high efficien- cy and exceptional wideband performance as compared to existing technolo- gies such as silicon (SI) or gallium arsenide (GaAs). A key advantage to gallium nitride is its ability to maintain high operating voltages at higher frequency ranges. This is due to the unique combination of high bandgap energy resul- ting in higher device tolerance for high maximum field strengths, as well as the high speed properties of electron mobility and saturation velocity. The- se advantages thus distinguish the GaN from other competing technologies in terms of power generation in operating frequencies of 10 GHz and above. Besides the available output power the efficiency plays an important role in any device with limited energy and/or heat dissipation, which is the case for nearly all systems. Since up to now the power added efficiencies of GaN de- vices at GHz frequencies are still below what GaAs can offer, this efficiency factor becomes an important research task for the scientific community. The dissertation of Dr. Jutta Kühn focuses on the design of AlGaN/GaN HEMT high-power amplifiers in Class-AB operation for X-band (8-12GHz) applications with particular emphasis on an optimized power added efficiency (PAE). In this work a PAE enhancement at the device level with improved design techniques achieved output power levels of several watts and PAEs above 50%. The presen- ted work of Ms. Kühn is a fundamental basis for future research in the field of AlGaN/GaN-HEMT Power Amplifiers. The results will draw attention worldwide and entail more relevant research. I wish her all the best for her future. Prof. Dr.-Ing. Thomas Zwick - director of the IHE - Forschungsberichte aus dem Institut für Höchstfrequenztechnik und Elektronik (IHE) der Universität Karlsruhe (TH) (ISSN 0942-2935) Herausgeber: Prof. Dr.-Ing. Dr. h.c. Dr.-Ing. E.h. Werner Wiesbeck Band 1 Daniel Kähny Modellierung und meßtechnische Verifikation polarimetrischer, mono- und bistatischer Radarsignaturen und deren Klassifi- zierung (1992) Band 2 Eberhardt Heidrich Theoretische und experimentelle Charakterisierung der polari- metrischen Strahlungs- und Streueigenschaften von Antennen (1992) Band 3 Thomas Kürner Charakterisierung digitaler Funksysteme mit einem breit- bandigen Wellenausbreitungsmodell (1993) Band 4 Jürgen Kehrbeck Mikrowellen-Doppler-Sensor zur Geschwindigkeits- und Weg- messung - System-Modellierung und Verifikation (1993) Band 5 Christian Bornkessel Analyse und Optimierung der elektrodynamischen Eigenschaften von EMV-Absorberkammern durch numerische Feldberechnung (1994) Band 6 Rainer Speck Hochempfindliche Impedanzmessungen an Supraleiter / Fest- elektrolyt-Kontakten (1994) Band 7 Edward Pillai Derivation of Equivalent Circuits for Multilayer PCB and Chip Package Discontinuities Using Full Wave Models (1995) Band 8 Dieter J. Cichon Strahlenoptische Modellierung der Wellenausbreitung in urbanen Mikro- und Pikofunkzellen (1994) Band 9 Gerd Gottwald Numerische Analyse konformer Streifenleitungsantennen in mehrlagigen Zylindern mittels der Spektralbereichsmethode (1995) Forschungsberichte aus dem Institut für Höchstfrequenztechnik und Elektronik (IHE) der Universität Karlsruhe (TH) (ISSN 0942-2935) Band 10 Norbert Geng Modellierung der Ausbreitung elektromagnetischer Wellen in Funksystemen durch Lösung der parabolischen Approximation der Helmholtz-Gleichung (1996) Band 11 Torsten C. Becker Verfahren und Kriterien zur Planung von Gleichwellennetzen für den Digitalen Hörrundfunk DAB (Digital Audio Broadcasting) (1996) Band 12 Friedhelm Rostan Dual polarisierte Microstrip-Patch-Arrays für zukünftige satelli- tengestützte SAR-Systeme (1996) Band 13 Markus Demmler Vektorkorrigiertes Großsignal-Meßsystem zur nichtlinearen Cha- rakterisierung von Mikrowellentransistoren (1996) Band 14 Andreas Froese Elektrochemisches Phasengrenzverhalten von Supraleitern (1996) Band 15 Jürgen v. Hagen Wide Band Electromagnetic Aperture Coupling to a Cavity: An In- tegral Representation Based Model (1997) Band 16 Ralf Pötzschke Nanostrukturierung von Festkörperflächen durch elektro- chemische Metallphasenbildung (1998) Band 17 Jean Parlebas Numerische Berechnung mehrlagiger dualer planarer Antennen mit koplanarer Speisung (1998) Band 18 Frank Demmerle Bikonische Antenne mit mehrmodiger Anregung für den räumli- chen Mehrfachzugriff (SDMA) (1998) Band 19 Eckard Steiger Modellierung der Ausbreitung in extrakorporalen Therapien ein- gesetzter Ultraschallimpulse hoher Intensität (1998)

Description:
high-power amplifiers in Class-AB operation for X-band (8-12GHz) applications with particular emphasis on an optimized power added efficiency (PAE). In this work a PAE enhancement at the device level den Digitalen Hörrundfunk DAB (Digital Audio Broadcasting). (1996). Band 12 Friedhelm Rostan.
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