The DB0603N5500ANTR from KYOCERA AVX is a 90 Degree Hybrid Coupler with Frequency 5.1 to 5.9 GHz, Average Power 10 W, Insertion Loss 0.6 to 0.8 dB, Isolation 10 to 14 dB, Coupling 3 dB. Tags: Surface Mount. More details for DB0603N5500ANTR can be seen below.