The CDC-005180-30 from Atlantic Microwave is a Directional Coupler with Frequency 0.5 to 18 GHz, Coupling 30 dB, Coupling Variation ± 1 dB, Frequency Sensitivity ±1 dB, Directivity 10 dB. Tags: Module with Connectors. More details for CDC-005180-30 can be seen below.