Equivalence of Physical Optics and Aperture Field Integration MethodIntegration Surfaces for Polyhedron Approximate Reflectors

Masayuki OODO  Makoto ANDO  

IEICE TRANSACTIONS on Electronics   Vol.E80-C   No.11   pp.1467-1475
Publication Date: 1997/11/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Electromagnetic TheoryScattering and Diffraction)
physical optics,  aperture field integration method,  integration surface,  equivalent surface currents,  

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Equivalence of physical optics (PO) and aperture field integration method (AFIM) in the full 360 observation angle is discussed for polyhedron approximate reflectors; the necessary conditions of integration surface in AFIM for the equivalence to PO are presented. In addition to the condition that complete equivalent currents consisting of both geometrical optics (GO) reflected fields from the reflector and direct incident fields from the feed source are used, the integration surface should cap the reflector perfectly and should be in the illuminated region of the GO reflected field. Validity of the conditions is numerically confirmed for a two-dimensional (2-D) strip reflector, 3-D corner reflectors and a 2-D polyhedron approximate reflector.