The AB1159B931 from Anatech Electronics is a Band Pass Filter with Frequency 1.11 to 1.21 GHz, Bandwidth 99 MHz, Center Frequency 1159.5 MHz, Insertion Loss 1.8 dB, Upper Rejection 45 dBc @ 1221.5 MHz. Tags: Module with Connectors, Cavity Filter. More details for AB1159B931 can be seen below.