The AM1842B1659 from Anatech Electronics is a Band Pass Filter with Frequency 1.805 to 1.88 GHz, Bandwidth 75 MHz, Center Frequency 1842.5 MHz, Insertion Loss 3.5 dB, Rejection 35 to 50 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for AM1842B1659 can be seen below.