The DC36-20S-9.2G from MegaPhase is a Directional Coupler that operates from 0.5 to 18 GHz. It has a coupling value of 20 dB, directivity of over 14 dB and an insertion loss of under 1.3 dB. The coupler can handle up to 25 watts of power and has a VSWR of 1.50:1. It is available in a module with SMA connectors.