The AM1842B151 from Anatech Electronics is a Band Pass Filter with Frequency 1.81 to 1.88 GHz, Bandwidth 75 MHz, Center Frequency 1842.5 MHz, Insertion Loss 1.9 dB, Upper Rejection 25 dB @ 1590-1665 MHz. Tags: Ceramic, Surface Mount, Ceramic Filter. More details for AM1842B151 can be seen below.