Radiation Pattern Analysis of Reflector Antennas : Discussions and Hybrid Use of Physical Optics and Aperture Field Integration Method(<Special Section>Recent Progress in Antennas and Propagation Researches : Selected Papers Translated from the IEICE Tran
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This paper reviews the approximation principle of Physical Optics in view of diffraction theory. Two key error factors are identified for PO, that is, 1) errors in edge diffraction coefficients and 2) fictitious penetrating rays. Improved methods named PO-AF and PTD-AF are proposed as the methods which suppress the fictitious penetrating rays from PO and PTD respectively. In deep shadow regions of the reflector antennas, PO-AF and PDT-AF approach to PO-EEC and UTD respectively, while the continuity is assured. The effectiveness is numerically demonstrated for two dimensional scatterers.
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- 2005-05-01
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