The 317.2203-XN from Microwave Devices Inc. is a Directional Coupler with Frequency 1 to 4 GHz, Coupling 30 to 50 Db, Coupling Variation ±1.0 dB, Frequency Sensitivity ±0.60 dB, Directivity 15 dB. Tags: Module with Connectors. More details for 317.2203-XN can be seen below.