高頻近似下新月形導(dǎo)體的散射場(chǎng)計(jì)算和散射體輪廓的投影重建
THE CALCULATION OF THE SCATTERED FIELD PRODUCED BY A CRESCENTLIKE CONDUCTOR UNDER HF APPROXIMATION AND THE CONTOUR PROJECTION
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摘要: 本文研究了高頻條件下一個(gè)三維新月形導(dǎo)電物體的電磁散射遠(yuǎn)場(chǎng)的計(jì)算問(wèn)題。在計(jì)算中我們根據(jù)物理光學(xué)和Fock理論得到散射體表面的等效面電流分布,并引入一沿邊緣的線電荷分布以計(jì)入邊緣的貢獻(xiàn)。計(jì)算結(jié)果用于散射體輪廓的投影重建獲得成功。
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關(guān)鍵詞:
- 高頻近似; 電磁散射; 等效面電流分布; 輪廓投影重建
Abstract: The calculation of the scattered far-zone EM field produced by a crescentlike three-dimensional conductor under HF approximation is studied. The equivalent surface current distributions used in the calculation are obtained from the physical optics and Fock s theory. To take account of the contribution of the edge, a line distribution of charge along it is introduced. The calculated field data are applied to reconstruct the contour projections of the scatterer successfully. -
馮孔豫,馮思民.電子科學(xué)學(xué)刊,1995, 17(1): 98-102.[2]Fock V A. Electromagnetic diffraction and propagation problems. New York: Pergamon, 1965, Part 1, Chap.2.[3]Silver S. Microwave antenna theory and design. MIT Radiation Laboratory Series. New York: McGraw-Hill, 1949, Vo1.12, Chap.S.[4]Stratton J A. Electromagnetic theory. New York: McGraw-Hill, 1941, Chap.8.[5]James G L. Geometrical theory of diffraction for electromagnetic waves. London: Peter Peregrinus Ltd., 1980, Chap.2.[6]任朗.天線理論基礎(chǔ).北京:人民郵電出版社,1980,第十三章. -
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