**RADIATION OF A DIPOLE LOCATED ON AXIS OF A SEMITRANSPARENT DISK**

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**Vadim A. Kaloshin**^{ 1}, Kirill K. Klionovski^{ 2}

^{1 }Kotelnikov Institute of
Radioengineering and Electronics of RAS

^{2} JSC «Concern
«Morinformsystem-Agat»»

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The paper is received on May 20, 2014

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**Abstract.** Asymptotic formulas for scattering
fields of arbitrarily oriented magnetic and electric dipoles located on axis of
a semitransparent disk were obtained using the Kirchhoff approximation and the
stationary phase method. Expressions for the front-to-back ratio of magnetic
and electric dipoles oriented parallel to the disk were obtained. Optimization
of the disk’s transparency was performed to reduce the back radiation of a
magnetic dipole oriented parallel to the disk. Radiation patterns were calculated
using the asymptotic formulas and a numerical solution of a singular integral
equation.

**Keywords: **semitransparent disk,
spherical wave, electric and magnetic dipole, Kirchhoff approximation,
stationary phase method*.*