The C09-0R418 is a directional coupler from Marki Microwave operates from 450 MHz to 18 GHz. This 9 dB coupler exhibits excellent coupling flatness, has high directivity of 22 dB and an insertion loss of 2 dB. It has an amplitude flatness of 0.7 dB and VSWR of 1.15:1. The coupler is available in a module with SMA connectors and weighs 90g. Custom designs for this coupler are also available.