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Design of a High Power and High Gain Two-Stage Doherty Power Amplifier  

Ghim, Jae-Gon (Dept. of Radio Science & Engineering, Kwangwoon University)
Kim, Ji-Yeon (Dept. of Radio Science & Engineering, Kwangwoon University)
Lee, Dong-Heon (Dept. of Radio Science & Engineering, Kwangwoon University)
Kim, Jong-Heon (Dept. of Radio Science & Engineering, Kwangwoon University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.17, no.11, 2006 , pp. 1030-1039 More about this Journal
Abstract
A high power and high gain Doherty amplifier is designed by using embedded driver amplifiers in the final stage. The operational characteristics of a two-stage Doherty amplifier are analyzed, as a function of the two-stage peaking amplifier gate biases. The driver stages and final output stages are implemented using two single-ended MRF21045s and a single push-pull packaged MRF5P21180, respectively. This two-stage Doherty amplifier demonstrated 27 dB gain with a PAE of 23 % at 15 W average output power.
Keywords
Two-Stage Doherty; Embedded Drive Stage; Peaking Amplifier; Gate Bias;
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