Validation and Implementation of a Near-Field Physical Optics Formulation

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Authors
  1. Legault, S.R.
  2. Louie, A.
Corporate Authors
Defence R&D Canada - Ottawa, Ottawa ONT (CAN)
Abstract
Previously proposed modifications to physical optics for improving the accuracy of scattered field computations are validated within the context of actual scattering problems. Results suggest that the procedure can potentially extend the region of validity of physical optics from the far field to short ranges lying well within the near field. Furthermore, in the case of fiat plates, the angular region over which accurate results are obtained remains approximately the same even at shorter ranges. Finally, computations using an actual ship model verify that the improved formulations captures variations in the scattered field which would otherwise go unnoticed using a standard formulation.

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Keywords
Physical optics;RAPPORT;RCS computations;RCS measurements;High-frequency methods;Near-field observations
Report Number
DRDC-OTTAWA-TM-2004-131 — Technical Memorandum
Date of publication
01 Aug 2004
Number of Pages
56
DSTKIM No
CA024549
CANDIS No
522198
Format(s):
Hardcopy;CD ROM

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