Accuracy Improvement of Characteristic Basis Function Method by Using Multilevel Approach

Tai TANAKA  Yoshio INASAWA  Naofumi YONEDA  Hiroaki MIYASHITA  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E101-C   No.2   pp.96-103
Publication Date: 2018/02/01
Online ISSN: 1745-1353
Type of Manuscript: PAPER
Category: Electromagnetic Theory
Keyword: 
characteristic basis function method (CBFM),  method of moments (MoM),  radar cross section (RCS),  singular value decomposition (SVD),  

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Summary: 
A method is proposed for improving the accuracy of the characteristic basis function method (CBFM) using the multilevel approach. With this technique, CBFs taking into account multiple scattering calculated for each block (IP-CBFs; improved primary CBFs) are applied to CBFM using a multilevel approach. By using IP-CBFs, the interaction between blocks is taken into account, and thus it is possible to reduce the number of CBFs while maintaining accuracy, even if the multilevel approach is used. The radar cross section (RCS) of a cube, a cavity, and a dielectric sphere were analyzed using the proposed CBFs, and as a result it was found that accuracy is improved over the conventional method, despite no major change in the number of CBFs.