The BDC1103-20 from Federal Custom Cable is a Directional Coupler with Frequency 1 to 4 GHz, Coupling 20 dB, Coupling Variation +/- 1 dB, Frequency Sensitivity +/- 0.4 dB, Average Power 50 W. Tags: Module with Connectors. More details for BDC1103-20 can be seen below.