The 317.2201-XN from Microwave Devices Inc. is a Directional Coupler with Frequency 500 MHz to 2 GHz, Coupling 30 to 50 Db, Coupling Variation ±1.0 dB, Frequency Sensitivity ±0.75 dB, Directivity 18 dB. Tags: Module with Connectors. More details for 317.2201-XN can be seen below.