SUMMARYThe computer-aided analysis and design of direct-coupled and quarter-wave-coupled bandpass filters utilizing monomode rectangular waveguides with 1 -dimensional offset discontinuities are described. The equivalent networks of these discontinuities, which consist of a shunt reactance and additional transmission lines connected at both sides, have been derived from the rigorous field-theoretical investigations of E-plane and H-plane displacements in rectangular waveguide. Both network elements are tabulated in terms of geometry and wavelength with fine steps to allow accurate interpolation by means of computational methods. Simple design formulae for the filter geometry as a function of the electrical specifications are given which are based upon narrow-band approximations. The analytical relationships required for a computer simulation of the filter's wide-band performance are summarized. The predicted frequency characteristics showed such close agreement with the experimental results obtained on two X-band filter models that neither tuning elements in the waveguide sections nor final adjustments of the offset widths had to be provided.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.