A 6W Uneven LDMOS Doherty Power Amplifier With High Efficiency for GSM900 Base Stations

Conference: GeMiC 2009 - German Microwave Conference
03/16/2009 - 03/18/2009 at München, Germany

Proceedings: GeMiC 2009

Pages: 4Language: englishTyp: PDF

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Bathich, Khaled; Sayed, Ahmed; Boeck, Georg (Microwave Engineering Lab, Berlin University of Technology, Einsteinufer 25, D-10587, Berlin, Germany)

In this paper, a 6W uneven LDMOS Doherty power amplifier (DPA), designed for GSM900 base stations, which implement phased antenna array transmission, is presented. The designed Doherty PA can deliver a maximum power of 6.5W. A high drain efficiency of η=64% (PAE=58%) is measured. The efficiency is maintained above η=43% (PAE=37%), over 6-dB output backoff, and above η=31% (PAE=29%), over 9-dB output backoff, related to the maximum (saturated) power.