完全導体円板による散乱電磁波の多倍長計算

概要

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In the case of the numerical calculation using the analysis method of Nomura and Katsura,good results up to 2.5 or 3.0 wavelength with the double precision or the quadruple precision are able to be obtained, to electromagnetic diffraction by a circular disk of a perfect conductor. The cause of it can be explained by the fact that the numerical calculation is executed with sufficient precision in the calculationprocess. GMP is the library that can execute the numerical calculation by multiple precision in C andC++ language. MPFR, based on GMP, is the supplementary library equipped with the mathematical library functions. GMP++ differs from GMP in terms of the classes. MPFR do not have C++ classinterfaces. So, we have to design new interfaces. The purpose of this study is to investigate the cause ofthe fault results, and alter them to be good results using GMP, MPFR, GMP++ and the new interfaces while the radius of the disk is over 3 wavelengths.
東京都立産業技術高等専門学校の論文