The BM80066 from Bracke Manufacturing is a 90 Degree Hybrid Coupler with Frequency 2.6 to 5.2 GHz, Isolation 20 dB, Coupling 3.2 dB, Frequency Sensitivity ±1.2 dB, Phase Balance 4 Degrees. Tags: Module with Connectors. More details for BM80066 can be seen below.