A broadband high efficiency class-AB LDMOS balanced power amplifier

In this paper, an LDMOS class-AB balanced power amplifier with a 3-dB bandwidth of 800 MHz at a center frequency of 2 GHz is presented. To the best of the authors' knowledge, this is the largest bandwidth reported so far at these frequencies in an LDMOS technology. 50 Watt output power, high efficiency, high linearity and input-and output-matching better than -10 dB have been achieved over this large frequency band. An advanced stability improvement is introduced in this paper.