The MAX5J127142 from Narda-MITEQ is a Frequency Multiplier with Input Frequency 2.54 to 2.84 GHz, Output Frequency 12.7 to 14.2 GHz, Input Power 3 to 8 dBm, Output Power 6 dBm, Conversion Loss 3 dB. Tags: Module with Connectors, Active. More details for MAX5J127142 can be seen below.