to establish the degree of coupling between adjacent resonators while this results in a longer waveguide for the given number of sections the filter benefits from a substantially higher quality factor u201c q u201d than exists in similar filters having vanes separating the sections the use of increased resonator spacing to establish a desired decoupling between filter sections is also notable with regard to the two resonators furthest from the input and output terminals referring again to fig2 if the resonators are numbered from input to output along the length of the waveguide with the resonator adjacent to the input terminal being the first and the resonator adjacent to the output terminal being the sixth the third and fourth resonators reside at the side of the filter opposite the input and output terminals the two waveguide sections could be placed directly next to each other and a vane used between the third and fourth resonators to provide the necessary decoupling however in the embodiment of fig2 a larger separation between the third and fourth resonators is used to maximize the q factor of the filter because of the spacing between the third and fourth resonators it is necessary to separate the two waveguide sections from each other as shown in fig2 the first segment 30 is physically separated from the second segment 32 and additional connecting waveguide segment 34.