The CD-1-17000-21000-10-10-KF-KF-KF / 011057 from DETI Microwave is a Directional Coupler with Frequency 17 to 21 GHz, Coupling 10 dB, Coupling Variation ±1 dB, Frequency Sensitivity ±0.5 dB, Directivity 15 dB. Tags: Module with Connectors. More details for CD-1-17000-21000-10-10-KF-KF-KF / 011057 can be seen below.