The CS20-01-436/3N from Pulsar Microwave is a Directional Coupler with Frequency 500 MHz to 1 GHz, Coupling 20 dB, Coupling Variation ±1.25 dB, Amplitude Flatness 0.75 dB, Directivity 22 dB. Tags: Module with Connectors. More details for CS20-01-436/3N can be seen below.