The ERZ-HPA-1900-3800-21 from ERZIA is a RF Amplifier with Frequency 19 to 38 GHz, Small Signal Gain 13 to 24 dB pk-pk, Gain Flatness ±4 dB, Output Power 19 to 23 dBm, Output Power 0.08 to 0.2 W. Tags: Power Amplifier. More details for ERZ-HPA-1900-3800-21 can be seen below.