The HC19F03 from Yantel Corporation is a 90 Degree Hybrid Coupler with Frequency 1.7 to 2.3 GHz, Average Power 25 W, Insertion Loss 0.20 to 0.30 dB, Isolation 19.5 to 21 dB, Coupling 3 dB. Tags: Surface Mount. More details for HC19F03 can be seen below.