The 317.2017-20/S from Microwave Devices Inc. is a Directional Coupler with Frequency 5.8 to 6.4 GHz, Coupling 20±1.00 dB, Coupling Variation ±1.00 dB, Frequency Sensitivity ±0.30 dB, Directivity 15 dB. Tags: Module with Connectors. More details for 317.2017-20/S can be seen below.