The 252-090-020 from Broadwave Technologies is a Directional Coupler with Frequency 2 to 4 GHz, Coupling 20 dB, Coupling Variation ± 1.0 dB, Frequency Sensitivity ± 0.6 dB, Directivity 20 dB. Tags: Module with Connectors. More details for 252-090-020 can be seen below.