The AM1575B1156 from Anatech Electronics is a Band Pass Filter with Frequency 1.57 to 1.59 GHz, Bandwidth 20 MHz, Center Frequency 1575 MHz, Insertion Loss 4.3 dB, Upper Rejection 12 dB @ 1553 MHz. Tags: Ceramic, Surface Mount, Ceramic Filter. More details for AM1575B1156 can be seen below.