Hybrid Analysis of Radar Cross Section of Open-Ended Cavity Scatterers by Using Modified Physical Optics and Iterative Physical Optics

Ryosuke HASABA  Makoto ANDO  

IEICE TRANSACTIONS on Electronics   Vol.E95-C   No.8   pp.1399-1405
Publication Date: 2012/08/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E95.C.1399
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Electromagnetic Theory
iterative physical optics,  radar cross section,  modified vector physical optics,  hybrid method,  

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Electromagnetic scattering at high-frequencies is computationally heavy. Radar cross section (RCS) of electrically large concave and convex objects are solved by using the hybrid method. For convex and concave surfaces, Modified-Vector Physical Optics (MPO) with enhanced accuracy and Iterative Physical Optics (IPO) taking multiple-reflections into account, are selectively and independently applied for convex and concave parts of the scatterer. The accuracy of RCS by this hybrid method is tested with the MoM based simulator Wipl-D as the reference. The RCS from relatively small scatterers with the dimension of the order of a few wavelengths can be successfully predicted.