The ZGBDC20-33HP+ from Mini-Circuits is a directional coupler that operates from 300 to 3000 MHz. This 20 dB coupler has a directivity of 23 dB, low insertion loss of 0.15 dB and high return loss of 28 dB. It can pass up to 3A of DC current from input to output and handle up to 250W of CW power. This directional coupler comes in a Rugged IP67 Weatherproof case with N-type female connectors making it ideal for use in field applications or remote monitoring sites. It can also be used in the lab.