The MAX5J114127 from Narda-MITEQ is a Frequency Multiplier with Input Frequency 2.28 to 2.56 GHz, Output Frequency 11.4 to 12.8 GHz, Input Power 3 to 8 dBm, Output Power 6 dBm, Conversion Loss 3 dB. Tags: Module with Connectors, Active. More details for MAX5J114127 can be seen below.