The AM1090B264 from Anatech Electronics is a Band Pass Filter with Frequency 1.087 to 1.093, Bandwidth 6 MHz, Center Frequency 1090 MHz, Insertion Loss 1.5 to 2 dB, Upper Rejection 30 dB @ 1130 MHz. Tags: Ceramic, Surface Mount, Ceramic Filter. More details for AM1090B264 can be seen below.