The MMA-174321-M4 from MicroWave Technology is a RF Amplifier with Frequency 17 to 43 GHz, Gain 21 dB, Output Power 17 to 20 dBm, Output Power 0.05 to 0.1 W, P1dB 18 dBm. Tags: Surface Mount, Gain Block. More details for MMA-174321-M4 can be seen below.