The HDC1103-30 from Federal Custom Cable is a Directional Coupler with Frequency 1 to 4 GHz, Coupling 30 dB, Coupling Variation +/- 1 dB, Frequency Sensitivity +/- 0.7 dB, Directivity 15 dB. Tags: Module with Connectors. More details for HDC1103-30 can be seen below.