The CHA4105-99F from United Monolithic Semiconductors is a RF Amplifier with Frequency 2 to 4 GHz, Gain 23 dB, Output Power 24 to 25.5 dBm, Output Power 0.25 to 0.35 W, P1dB 24 dBm. Tags: Power Amplifier, Driver Amplifier. More details for CHA4105-99F can be seen below.