The DC4759J5020AHF from TTM Technologies is a Directional Coupler with Frequency 4.7 to 5.9 GHz, Coupling 18.3 to 21 dB, Frequency Sensitivity ±0.91 to 1.02 dB, Directivity 5.3 to 15.4 dB, Power 2 W. Tags: Surface Mount. More details for DC4759J5020AHF can be seen below.