The AB5745B743 from Anatech Electronics is a Band Pass Filter with Frequency 5.74 to 5.76 GHz, Bandwidth 20 MHz, Center Frequency 5745 MHz, Insertion Loss 2 dB, Upper Rejection 60 dB @ 5765-6200 MHz. Tags: Module with Connectors, Cavity Filter. More details for AB5745B743 can be seen below.