The AM1747B54 from Anatech Electronics is a Band Pass Filter with Frequency 1.71 to 1.77 GHz, Bandwidth 60 MHz, Center Frequency 1740 MHz, Insertion Loss 1.7 to 2.5 dB, Upper Rejection 50 dB 3420-3540 MHz. Tags: Ceramic, Surface Mount, Ceramic Filter. More details for AM1747B54 can be seen below.