The GRF4200 from Guerrilla RF is a RF Amplifier with Frequency 100 MHz to 3.8 GHz, Gain 21.5 dB, Noise Figure 4 dB, Output Power 18 dBm, Output Power 0.06 W. Tags: Surface Mount, Gain Block, Driver Amplifier. More details for GRF4200 can be seen below.