The AM1575S373 from Anatech Electronics is a Band Pass Filter with Frequency 1.57 to 1.58 GHz, Bandwidth 2 MHz, Center Frequency 1575.42 MHz, Insertion Loss 1.1 to 1.5 dB, Upper Rejection 30 dB 1625-1650 MHz. Tags: Surface Mount, RF SAW Filter. More details for AM1575S373 can be seen below.