The AM1090S923 from Anatech Electronics is a Band Pass Filter with Frequency 1.08 to 1.1 GHz, Bandwidth 22 MHz, Center Frequency 1090 MHz, Insertion Loss 0.9 to 2 dB, Upper Rejection 43 dB 1170-2000 MHz. Tags: Surface Mount, RF SAW Filter. More details for AM1090S923 can be seen below.