Abstract
Focal region field of a two dimensional Gregorian system coated with chiral medium is analyzed at high frequency. Maslov's method is used because the Geometrical Optics approximation fails at focal points. Maslov’s method combines the simplicity of ray theory and the generality of Fourier transform. Fields patterns are calculated numerically and the results are plotted. The effects of thickness of chiral layer, chirality parameter of the chiral medium and permittivity of the medium are analyzed. The problem of simple dielectric layer is discussed as a special case of this problem.
Highlights
The knowledge of focal region field of focusing systems is useful for synthesizing feed arrays in imaging and design of multiple beam antennas in communication systems
Focal region field of a two dimensional Gregorian system coated with chiral medium is analyzed at high frequency
The focusing of electromagnetic waves into material media is a subject of considerable current interest due to applications in hyperthermia, microscopy, and optical data storage
Summary
The knowledge of focal region field of focusing systems is useful for synthesizing feed arrays in imaging and design of multiple beam antennas in communication systems. GO is used only for high frequency approximation of a wave, provided the ray tube does not vanish. At caustic regions the ray tube shrinks to zero and GO show singularity at these regions These regions are of great importance in all practical problems e.g. parabolic, paraboloidal and circular reflectors etc. To avoid these singularities Maslov proposed a method based on Maslovs theory [4,5]. High frequency field expressions has been derived around feed point of a two dimensional Gregorian system using the Maslov’s method in [19].
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