The 4R9-2000-X4S11 from Reactel is an ultra-narrowband notch filter with a center frequency of 2000 MHz and passbands from 1960-1998 & 2002-2130 MHz. The filter has an attenaution of more than 85 dB at the center of the notch and less than 0.75 dB of insertion loss in the passbands. It is available in a module that measures 2.5 x 2.5 x 18 inches with SMA female connectors.
