The MH-54 from Cobham Signal & Control Solutions is a 180 Degree Hybrid Coupler with Frequency 7 to 12.4 GHz, Coupling 3 dB, Coupling Variation ±.60 dB, Insertion Loss 0.45 dB, Isolation 15 dB. Tags: Module with Connector. More details for MH-54 can be seen below.