The SMM5855V1D from Sumitomo Electric Device Innovations is a RF Amplifier with Frequency 21.2 to 23.6 GHz, Gain 25 dB, Power Gain 20 to 28 dB, Output Power 33 dBm, Output Power 2 W. Tags: Surface Mount, Ceramic, Hermetic, Power Amplifier. More details for SMM5855V1D can be seen below.