The ATX18-423 from Wright Technologies is a Frequency Multiplier with Input Frequency 3.5 to 4.5 GHz, Output Frequency 14 to 18 GHz, Input Power 10 dBm, Output Power 23 dBm (Sat), Harmonics -20 dBc. Tags: Module with Connectors. More details for ATX18-423 can be seen below.