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"True" physical optics for the accurate characterization of antenna radomes and lenses

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Author: Neto, A.
Type:article
Date:2003
Source:2003 IEEE International Antennas and Propagation Symposium and USNC/CNC/URSI North American Radio Science Meeting, 22-27 June 2003, Columbus, OH, Conference code: 61393, 4, 416-419
Identifier: 237249
Keywords: Physics · Antenna radiation · Fourier transforms · Green's function · Physical optics · Dielectric slabs · Equivalent currents · Radomes

Abstract

With the introduction of the "True" Physical Optics, the source in the far field of the canonical structure was not assumed but instead to use the exact dielectric slab's GF's in orde to obtain a more accurate approximation of the PO currents in both the external and the internal sides of the radome. Indeed the PO approximation, consists only in assuming that, for large radii of curvature of the structure, the currents are locally the same as the ones associated to the canonical planar structure that best fits the actual geometry in the point considered.