The QH-28 from Cobham Signal & Control Solutions is a 90 Degree Hybrid Coupler with Frequency 500 MHz to 1 GHz, Insertion Loss 0.15 dB, Isolation 22 dB, Coupling 3 dB, Coupling Variation ±.40 dB. Tags: Module with Connectors. More details for QH-28 can be seen below.