A 500–600 MHz GaN power amplifier with RC–LC stability network

A 500–600 MHz high-efficiency, high-power GaN power amplifier is designed and realized on the basis of the push-pull structure. The RC–LC stability network is proposed and applied to the power amplifier circuit for the first time. The RC–LC stability network can significantly reduce the high gain out the band, which eliminates the instability of the power amplifier circuit. The developed power amplifier exhibits 58.5 dBm (700 W) output power with a 17 dB gain and 85% PAE at 500–600 MHz, 300 μ s, 20% duty cycle. It has the highest PAE in P-band among the products at home and abroad. (paper)