The FMBL1003 from Fairview Microwave is a Balun with Frequency 80 MHz to 1 GHz, Amplitude Balance ±0.35 dB, Phase Balance ±5 Degree, Phase_Shift 180 Degree (Difference), Insertion Loss 0.45 dB. Tags: Surface Mount, Unbalanced to Balanced. More details for FMBL1003 can be seen below.