The AM1090B472 from Anatech Electronics is a Band Pass Filter with Frequency 1.09 to 1.1 GHz, Bandwidth 10 MHz, Center Frequency 1090 MHz, Insertion Loss 4.5 dB, Upper Rejection 67 MHz @ 1113 MHz. Tags: Ceramic, Surface Mount, Ceramic Filter. More details for AM1090B472 can be seen below.