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Abstract
The theory of scattering in open and closed areas by a novel structure of a dielectric-metallic post is developed with the use of a combination of a modified iterative scattering procedure and an orthogonal expansion method. The scattered field pattern for open structures and frequency responses of the transmission and re ection coefficients in a rectangular waveguide are derived. The turn and displacement of the post in a waveguide allows to change the resonance frequency of the circuit. A good agreement is obtained between the results of our method and those received from FDTD simulations and measurements. The proposed model is much faster than the FDTD method used for comparison. The computation time is independent of the kind of dielectric material the post is made of.