The WHC1720A from Wavelex is a 90 Degree Hybrid Coupler with Frequency 1.7 to 2 GHz, Average Power 10 W, Insertion Loss 0.5 to 1.0 dB, Isolation 20 dB, Amplitude Balance ± 0.4 to 0.8 dB. Tags: Module with Connectors. More details for WHC1720A can be seen below.