The B1118G81 from Gowanda Electronics is a bandpass filter that operates from 17.8 to 19.8 GHz. It has an insertion loss of 2 dB and an upper/lower stopband rejection of 35/50 dBc. The filter can handle up to 1 W of CW power. It is available in a module that measures 2.50 x 0.50 X 0.50 inches and has SMA female connectors.
