The AD9C1747/1842F75KCA from Vanlong is a RF Duplexer with Frequency 1.71 to 1.88 GHz, Band 1 1.71 to 1.785 GHz, Band 2 1.805 to 1.88 GHz, Insertion Loss 3.8 dB, Attenuation 18 to 25 dB. Tags: Surface Mount. More details for AD9C1747/1842F75KCA can be seen below.