R. Coccioli et al., DESIGN OF TOLERANCE-CORRECTED FILTERS EMPLOYING HALF-CYLINDER POSTS, IEEE transactions on microwave theory and techniques, 46(1), 1998, pp. 116-118
An alternative post geometry suitable for the realization of waveguide
filters is investigated, The new post consists of half a cylinder, Du
e to its asymmetry it is possible to vary the electrical characteristi
cs of such an element by means of a simple rotation. This permits us t
o compensate for fabrication tolerances of a filter without introducin
g additional screws.