The AE1890WN2240 from Anatech Electronics is a Band Stop Filter with Stopband Frequency 1.88 to 1.9 GHz, Insertion Loss 1.5 dB, Rejection 30 dB, Power 50 W, Return Loss 14 dB. Tags: Module with Connectors, Notch Filter. More details for AE1890WN2240 can be seen below.