The AM2050B1117 from Anatech Electronics is a Band Pass Filter with Frequency 1.6 to 2.5 GHz, Bandwidth 900 MHz, Center Frequency 2050 MHz, Insertion Loss 2 dB, Rejection 15 to 40 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for AM2050B1117 can be seen below.