The CI2640 from CentricRF is an Isolator that operates from 26.5 to 40 GHz. It has an isolationof 14 dB, insertion loss of 1 dB and can handle up to 5 watts of power. The isolator has a VSWR of 1.5:1 and is matched to 50 ohms. It is available in a module with 2.92 mm Female connectors.