The 20S4G11AM4 from AR RF/Microwave Instrumentation is a RF Amplifier with Frequency 4 to 10.6 GHz, Gain 43 dB, Gain Flatness ±3 dB, Output Power 42.55 to 43.42 dBm, Output Power 17.99 to 21.98 W. Tags: Power Amplifier. More details for 20S4G11AM4 can be seen below.