The AM1804B1177 from Anatech Electronics is a Band Pass Filter with Frequency 1.7565 to 1.8515 GHz, Bandwidth 95 MHz, Center Frequency 1804 MHz, Insertion Loss 1.5 dB, Rejection 40 to 45 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for AM1804B1177 can be seen below.