The BW1700/1701 from Sainty-Tech Communications Limited is a 90 Degree Hybrid Coupler with Frequency 1.2 to 1.4 GHz, Average Power 50 W, Insertion Loss 0.2 dB, Isolation 40 dB, Coupling 18.5 to 19.5 dB. Tags: Die. More details for BW1700/1701 can be seen below.