University of Illinois at Chicago
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Exact radiation of a dipole in the presence of a circular aperture in a ground plane backed by a spheroidal cavity and covered with an isorefractive diaphragm

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posted on 2014-02-05, 00:00 authored by Marco Valentino, Danilo Erricolo
An oblate semi-spheroidal cavity with metallic walls flush-mounted under a metallic ground plane is coupled to the half-space above the ground plane through an aperture that corresponds to the interfocal disk of the oblate spheroidal system. A diaphragm is located across the aperture. The diaphragm material, the material filling the cavity, and the half-space are isorefractive to each other. A new exact solution is obtained for the radiation of an electric or a magnetic dipole located on the symmetry axis of the structure and axially oriented. The exact solution is expressed in terms of series containing oblate spheroidal functions. These series are evaluated to provide a benchmark solution for a primary source located either inside the cavity below the diaphragm, or outside the cavity in the unbounded medium.


This work was supported by the U.S. Department of Defense and the US Air Force Office of Scientific Research under MURI grant F49620-01-1-0436. Additionally, this work was supported in part by a grant of computer time from the DOD High Performance Computing Modernization Program at ASC.


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This is a copy of an article published in the Radio Science © 2007 American Geophysical Union


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