Title :
Doherty power amplifier with asymmetrical drain voltages for enhanced efficiency at 8 dB backed-off output power
Author :
Kitahara, Tetsuro ; Yamamoto, Takayuki ; Hiura, Shinsaku
Author_Institution :
Toshiba Corporation, Yokohama, Japan
Abstract :
Summary form only given, as follows. In this paper, we present a high-efficiency 300 W Doherty power amplifier (DPA) that can improve the efficiency at an 8 dB backoff from its saturated output power (PSAT). To enhance the efficiency, asymmetrical drain voltages are supplied to a carrier amplifier and a peak amplifier in the DPA. Measurement results using a CW signal indicate a drain efficiency (Ed) of 50% at a PSAT of 55 dBm and a Ed of 48% at an 8 dB backoff from PSAT.
Conference_Titel :
Microwave Symposium Digest (MTT), 2011 IEEE MTT-S International
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-61284-754-2
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2011.5973147
