The CS20-05-436/10 from Pulsar Microwave is a Directional Coupler with Frequency 2 to 4 GHz, Coupling 20 dB, Coupling Variation ±1.25 dB, Amplitude Flatness 0.75 dB, Directivity 22 dB. Tags: Module with Connectors. More details for CS20-05-436/10 can be seen below.