Diffraction of Electromagnetic Waves from an Electric Dipole by a Conducting Circular Disc

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The diffraction of electromagnetic waves by a conducting circular disc is investigated according to a method developed by Y. Nomura, et al. in the particular case where the incident wave is coming from an electric dipole which is placed at a finite distance from the disc and polarized parallel to the disc surface. The solution for the diffraction by an aperture with a magnetic dipole as a source is easily obtained by the application of Babinet’s principle. Various physical quantities are evaluated for several distances between the disc and the dipole which is placed on the central axis of the disc. When the dipole is apart from the disc about five times of the radius, curves of the physical quantities resemble very much those for the normal incidence of plane waves.

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