The TDC-30180-20S from Talent Microwave Inc is a Dual Directional Coupler with Coupling 20 dB, Coupling Variation ±1.5 dB, Frequency 3 to 18 GHz, Average Power 50 W, Insertion Loss 0.5 to 0.6 dB. Tags: Module with Connectors. More details for TDC-30180-20S can be seen below.