PHEMT distributed power amplifier adopting broadband impedance transformer

Paoloni, Claudio and Narendra, K. and Limiti, Ernesto and Zhurbenko, Vitaliy (2013) PHEMT distributed power amplifier adopting broadband impedance transformer. Microwave Journal. pp. 76-82.

Abstract

A non-uniform drain line distributed power amplifier (DPA) employing a broadband impedance transformer is presented. The DPA is based on GaAs PHEMT technology. The impedance transformer employs asymmetric coupled lines and transforms a low output impedance of the amplifier to a standard 50 ohm transmission line. The output power of approximately 600 mW, with an associated gain of 9 dB and PAE greater than 30 percent, is demonstrated in the frequency range from 10 to 1800 MHz.