The RCPL-Cryo-3.5-12.5-xd-Sf-xW-Family-w18 from Raditek is a Directional Coupler with Frequency 3.5 to 12.5 GHz, Coupling 8 to 30 dB, Coupling Variation ±1 dB, Frequency Sensitivity ±0.35 to ±1 dB, Directivity 15 to 22 dB. Tags: Module with Connectors, Cryogenic. More details for RCPL-Cryo-3.5-12.5-xd-Sf-xW-Family-w18 can be seen below.