The X4C60J1-20G from TTM Technologies is a Directional Coupler with Frequency 4.4 to 6.3 GHz, Coupling 20 dB, Coupling Variation ±1.5 dB, Frequency Sensitivity ±0.1 to ±0.4 dB, Directivity 18 dB. Tags: Surface Mount. More details for X4C60J1-20G can be seen below.