The QH-57 from Cobham Signal & Control Solutions is a 90 Degree Hybrid Coupler with Frequency 8 to 16 GHz, Insertion Loss 0.5 dB, Isolation 16 dB, Coupling 3 dB, Coupling Variation ±.60 dB. Tags: Module with Connectors. More details for QH-57 can be seen below.