The AE2143WN2220 from Anatech Electronics is a Band Stop Filter with Stopband Frequency 2.139 to 2.147 GHz, Insertion Loss 0.8 dB, Rejection 35 dB, Power 20 W, VSWR 1.50:1, 1.80:1. Tags: Module with Connectors, Notch Filter. More details for AE2143WN2220 can be seen below.