The EMM5840X from Sumitomo Electric Device Innovations is a RF Amplifier with Frequency 21 to 27 GHz, Gain 25 dB, Power Gain 19 to 24 dB, Output Power 29 to 31 dBm, Output Power 0.79 to 1.26 W. Tags: Chip, Power Amplifier. More details for EMM5840X can be seen below.