The CS13-20-436/13 from Pulsar Microwave is a Directional Coupler with Frequency 2 to 18 GHz, Coupling 13 dB, Coupling Variation ±1 dB, Amplitude Flatness 0.5 dB, Directivity 12 to 15 dB. Tags: Module with Connectors. More details for CS13-20-436/13 can be seen below.