The RFXF5704 from MiniRF is a Balun with Frequency 5 MHz to 1.2 GHz, Amplitude Balance ± 0.5 to 1 dB, Phase Balance 7 to 10 Degree, Insertion Loss Less than 2 dB, Power 1 W. Tags: Surface Mount, Unbalanced to Balanced. More details for RFXF5704 can be seen below.