Title :
Design of an ultra-high efficiency GaN high-power amplifier for SAR remote sensing
Author :
Thrivikraman, Tushar ; Hoffman, James
Author_Institution :
Radar Science and Engineering, Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, 91109, USA
Abstract :
This work describes the development of a high-power amplifier for use with a remote sensing SAR system. The amplifier is intended to meet the requirements for the SweepSAR technique for use in the proposed DESDynI SAR instrument. In order to optimize the amplifier design, active load-pull technique is employed to provide harmonic tuning to provide efficiency improvements. In addition, some of the techniques to overcome the challenges of load-pulling high power devices are presented. The design amplifier was measured to have 49 dBm of output power with 75% PAE, which is suitable to meet the proposed system requirements.
Keywords :
Gallium nitride; Harmonic analysis; Impedance; Performance evaluation; Power generation; Power system harmonics; Tuning;
Conference_Titel :
Aerospace Conference, 2013 IEEE
Conference_Location :
Big Sky, MT
Print_ISBN :
978-1-4673-1812-9
DOI :
10.1109/AERO.2013.6497405
