The AM1843B1528 from Anatech Electronics is a Band Pass Filter with Frequency 1.8055 to 1.8805 GHz, Bandwidth 75 MHz, Center Frequency 1843 MHz, Insertion Loss 3 dB, Rejection 13 to 50 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for AM1843B1528 can be seen below.