The PCM4S5ACO from Empower RF is a RF Amplifier with Frequency 1.93 to 1.99 GHz, Small Signal Gain 49 to 51 dB pk-pk, Input Return Loss -14 dB, Harmonics -60 to -45 dBc, Spurious -70 dBc. Tags: Power Amplifier. More details for PCM4S5ACO can be seen below.