The LDDC-12.4/18-20S from Leader-MW is a Dual Directional Coupler with Coupling 20 dB, Coupling Variation ±1.25 dB, Frequency 12.4 to 18 GHz, Average Power 50 W, Insertion Loss 1 dB. Tags: Module with Connectors. More details for LDDC-12.4/18-20S can be seen below.