The CHA4107-QDG from United Monolithic Semiconductors is a RF Amplifier with Frequency 4.5 to 6.5 GHz, Small Signal Gain 22.5 dB, P1dB 0.355 W, Input Return Loss 8 to 14 dB, Supply Voltage 8 V (Drain). Tags: Surface Mount, Power Amplifier. More details for CHA4107-QDG can be seen below.