The CHA6161-QKB from United Monolithic Semiconductors is a RF Amplifier with Frequency 17 to 21.5 GHz, Gain 32 dB (Linear Gain), Saturated Power 1.58 to 2.81 W, Input Power 11 to 16 dBm, Input Power 0.012 to 0.039 W. Tags: Surface Mount, Power Amplifier. More details for CHA6161-QKB can be seen below.