The BD1722N5050AHF from TTM Technologies is a Balun with Frequency 1.6 to 2.2 GHz, Amplitude Balance ± 0.42 to 0.96 dB, Phase Balance 3.42 to 6.82 Degree, Insertion Loss 0.82 to 1.3 dB, Power 0.45 to 0.75 W. Tags: Surface Mount, Unbalanced to Balanced. More details for BD1722N5050AHF can be seen below.