Solid-state RF power amplifiers development at BARC

The paper presents the recent developments on solid- RF power amplifiers (SSRFPA) at Bhabha Atomic Research Centre (BARC). Recent developments on solid-state RF power amplifier modules using LDMOS devices higher power output (>800) per module, high power gain (∼20 dB), and moderate DC to RF conversion efficiency (>65%). RF power combiners at various outputs (1-10 kW) at arbitrary input ports have developed. Integral power amplifiers at 325 and 352 MHz have been designed for 1, 3, 5 and 7 kW output. It also includes the 270 W, 352 MHz driver of 1 MW klystron based high power RF system. This SSRFPA has power gain of 22 dB and drain efficiency of 63%. Another RF generator of 300 W, 100 MHz has been specifically developed for RF ion-source of 14 MeV generator. The RF generator has 71 % efficiency. The paper presents details and test results of all the SSRFPA developments. (author)