The BDC1109-20 from Federal Custom Cable is a Directional Coupler with Frequency 6 to 18 GHz, Coupling 20 dB, Coupling Variation +/- 1.25 dB, Frequency Sensitivity +/- 0.6 dB, Average Power 35 W. Tags: Module with Connectors. More details for BDC1109-20 can be seen below.