The C1-A60 from RD Microwaves is a Directional Coupler with Frequency 0.4 to 13 GHz, Coupling 6.1 to 30 dB, Coupling Variation 1 to 2.3 dB, Frequency Sensitivity ±0.8 to 1.5 dB, Directivity 4 to 20 dB. Tags: Module with Connectors. More details for C1-A60 can be seen below.