The QH-31 from Cobham Signal & Control Solutions is a 90 Degree Hybrid Coupler with Frequency 1 to 2 GHz, Insertion Loss 0.15 dB, Isolation 22 dB, Coupling 3 dB, Coupling Variation ±.40 dB. Tags: Module with Connectors. More details for QH-31 can be seen below.