A low-frequency solution to the diffraction problem of an E-polarized plane wave incident on a dielectric-loaded trough in a conducting plane is obtained. The dielectric loading consists of a circular cylinder which fits the semicircular trough in the conducting plane. The method used is a powerful low-frequency technique which has been succesfully applied to other problems of cylindrical geometry.
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Sachdeva et al. (1977) studied this question.
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