The CHA4253aQQG from United Monolithic Semiconductors is a RF Amplifier with Frequency 17 to 24 GHz, Gain 23 dB, Noise Figure 7.5 dB, Output Power 24 to 24.5 dBm, Output Power 0.25 to 0.28 W. Tags: Surface Mount, Power Amplifier. More details for CHA4253aQQG can be seen below.