The CS20-25-436/20 from Pulsar Microwave is a Directional Coupler that operates from 0.5 to 20 GHz. This 20 dB coupler has a directivity of more than 15 dB and an insertion loss of less than 0.9 dB. It can handle an input power of up to 25 W and a reflected power of up to 10 W. The coupler is available in a module that measures 4.40 x 0.70 x 0.40 inches and has SMA connectors.