The C1517J5003AHF from TTM Technologies is a 90 Degree Hybrid Coupler with Frequency 1.5 to 1.7 GHz, Average Power 4 W, Insertion Loss 0.2 to 0.3 dB, Isolation 24 to 28 dB, Coupling 3 dB. Tags: Surface Mount. More details for C1517J5003AHF can be seen below.