The AM1747B1664 from Anatech Electronics is a Band Pass Filter with Frequency 1.71 to 1.785 GHz, Bandwidth 75 MHz, Center Frequency 1747.5 MHz, Insertion Loss 3.5 dB, Rejection 35 to 50 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for AM1747B1664 can be seen below.