The 87301E from Keysight Technologies is a Directional Coupler with Frequency 2 to 50 GHz, Coupling 10 dB, Coupling Variation ± 1 dB, Frequency Sensitivity ± 0.6 to 0.8 dB, Directivity 10 to 13 dB. Tags: Module with Connectors. More details for 87301E can be seen below.