The HMC997LC4 from Analog Devices is a RF Amplifier with Frequency 17 to 27 GHz, Gain 16 to 20 dB, Gain Flatness ±0.3 to 0.7 dB, Noise Figure 3.5 to 4 dB, Output Power 21 to 25 dBm. Tags: Surface Mount, Variable Gain Amplifier, Driver Amplifier. More details for HMC997LC4 can be seen below.