The CHA4252-QKB from United Monolithic Semiconductors is a RF Amplifier with Frequency 17.2 to 21.3 GHz, Gain 30 dB (Linear Gain), Saturated Power 0.316 W, Input Power 10 dBm, Input Power 0.01 W. Tags: Surface Mount, Power Amplifier. More details for CHA4252-QKB can be seen below.