The AM1575B510 from Anatech Electronics is a Band Pass Filter with Frequency 1.56 to 1.59 GHz, Bandwidth 20 MHz, Center Frequency 1575 MHz, Insertion Loss 1.8 dB, Upper Rejection 7 dB @ 1540 MHz. Tags: Ceramic, Surface Mount, Ceramic Filter. More details for AM1575B510 can be seen below.