The WHC2040A from Wavelex is a 90 Degree Hybrid Coupler with Frequency 2 to 4 GHz, Average Power 10 W, Insertion Loss 0.5 to 1.2 dB, Isolation 20 dB, Amplitude Balance ± 1.3 dB. Tags: Module with Connectors. More details for WHC2040A can be seen below.