The BSF-W-00193 from Exceed Microwave is a Bandstop Filter with a stopband from 50.265 to 50.34 GHz. It has passbands from 47 to 50 GHz and 50.5 to 52 GHz with a passband insertion loss of less than 0.3 dB and provides a rejection of 10 dB in the stopband. This filter is available in a module with WR19 waveguide input and output interface.
