The CFM0505X420 from Cernex Inc is a Frequency Multiplier with Input Frequency 5.25 to 5.75 GHz, Output Frequency 21 to 23 GHz, Input Power 10 dBm, Output Power 20 dBm, Harmonics 20 dBc. Tags: Module with Connectors, Active, Passive. More details for CFM0505X420 can be seen below.