The AE1750B9973 from Anatech Electronics is a Band Pass Filter with Frequency 1.7 to 1.8 GHz, Bandwidth 100 MHz, Center Frequency 1750 MHz, Insertion Loss 2 dB, Upper Rejection 50 dB 2000 to 4000 MHz. Tags: Surface Mount, Lumped Component Filter. More details for AE1750B9973 can be seen below.