The BD1722J50100AHF from TTM Technologies is a Balun with Frequency 1.7 to 2.2 GHz, Amplitude Balance ±0.4 to 1.2 dB, Phase Balance 4 to 6 Degree, Insertion Loss 0.9 to 1.2 dB, Power 1.3 to 2 W. Tags: Surface Mount, Balanced to Unbalanced. More details for BD1722J50100AHF can be seen below.