The BDC-005020-30 from Atlantic Microwave is a Directional Coupler with Frequency 0.5 to 2 GHz, Coupling 30 dB, Coupling Variation ± 1 dB, Frequency Sensitivity ±0.7 dB, Directivity 20 dB. Tags: Module with Connectors. More details for BDC-005020-30 can be seen below.