The MAX5J125135 from Narda-MITEQ is a Frequency Multiplier with Input Frequency 2.5 to 2.7 GHz, Output Frequency 12.5 to 13.5 GHz, Input Power 3 to 8 dBm, Output Power 6 dBm, Conversion Loss 3 dB. Tags: Module with Connectors, Active. More details for MAX5J125135 can be seen below.