The AM1575B1577 from Anatech Electronics is a Band Pass Filter with Frequency 1572.4 to 1578.4 MHz, Bandwidth Fo ± 3 MHz, Center Frequency 1575.4 MHz, Insertion Loss 3 to 4.5 dB, Rejection 21 to 50 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for AM1575B1577 can be seen below.