The KBK-703S from Synergy Microwave is a directional coupler that operates from 1 to 500 MHz. It provides 11.5 dB of coupling with a directivity of more than 20 dB and a low insertion loss of under 1 dB. The coupler is matched to 50 ohms and can handle an input power of up to 1 watt. It is available in a connectorized module.