The ZDC9-20C1-40G-1661 from COM-MW is a Directional Coupler with Frequency 1 to 40 GHz, Coupling 19 to 21 dB, Directivity 10 dB, Average Power 20 W, Insertion Loss 2.1 dB. Tags: Module with Connectors. More details for ZDC9-20C1-40G-1661 can be seen below.