The AE1747NS2175 from Anatech Electronics is a Band Stop Filter with Stopband Frequency 1.71 to 1.78 GHz, Bandwidth 75 MHz, Insertion Loss 2 dB, Rejection 40 dB, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter, Notch Filter. More details for AE1747NS2175 can be seen below.