The MABA-011028 from MACOM is a Balun with Frequency 600 MHz to 1.7 GHz, Amplitude Balance 0.1 dB, Phase Balance 1 Degree, Insertion Loss 0.3 dB, Return Loss 15 dB. Tags: Surface Mount, Unbalanced to Balanced. More details for MABA-011028 can be seen below.