Menzel W., Macháč J.: Waveguide bandpass filters with attenuation of higher-order passbands, 23rd European Microwave Conference, Madrid 1993, pp. 606-607.
A new method is proposed to provide additional attenuation to higher-order passbands of metal waveguide bandpass filters. To this end, shunt waveguide sections with cut-off frequencies are included into the filter structure. Design and results of such filters are presented.