The RMHY3.400-800Nf180 from Response Microwave Inc is a 90 Degree Hybrid Coupler with Frequency 400 to 800 MHz, Insertion Loss 0.5 dB, Isolation 20 dB, Coupling 3 dB. Tags: Module with Connectors. More details for RMHY3.400-800Nf180 can be seen below.