The CS-2.500-M03 from MECA is an RF Circulator that operates from 2.3 to 2.7 GHz. It can handle up to 20 watts of average power and has a VSWR of below 1.25:1. The isolator has an insertion loss of under 0.4 dB and provides an isolation of over 20 dB. It is available in a module with SMA Female connectors.