Abstract
AbstractThe electromagnetic field scattered by two conducting strips located near a line source is calculated rigorously by using a cylindrical wave expansion. Numerical results are given for radiated far‐fields. As a simple approximate calculation of the present problem, one method similar to the Geometrical Theory of Diffraction (GTD) is also proposed. In this method the scattered field by the strips is approximated by the superposition of those scattered by the conducting half‐planes. It is found from the numerical comparison of the rigorous solution with the approximate one, that both results agree well and that the present approximate method is applicable to the case where the source and the edge are too close for the GTD. The condition of applicability is studied for the present method as applied to a strip grating with finite elements.
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