虚光线法及其在阻抗尖劈的平面波散射中的应用
VIRTUAL-RAY METHOD AND ITS APPLICATION IN THE PLANE WAVE SCATTERING BY AN IMPEDANCE WEDGE
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摘要: 本文从自由空间中的平面波出发导出了处理高频电磁散射问题的虚光线法,并用它研究了阻抗尖劈的平面波散射问题。处理过程中引入了广义圆的概念,从而得出了构成解的完整的幅度函数。与此同时,首次对求解过程中被忽略的一项作出了合理的物理解释。计算结果与G.D.Maliuzhinets(1958)的解析解符合得很好。Abstract: The virtual ray method for treating HF electromagnetic scattering problems is derived from the plane wave of free space, by use of which the plane wave scattering by an impedance wedge is studied. In the treatment the concept of generalized circle is introduced so that the complete amplitude function is obtained which is a component of the solution. And a reasonable physical interpretation of the term w 2, which was nelected previously, is given. The calculated result agrees well with the analytical soluton obtained by G. D. Maliuzhinets(1958).
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Orlov Yu I.[Ph. D. dissertation]. Moscow: Moscow University, 1969.[2]Vainshtein L A, Tishchenko E A. Wave-tracing and shortwave diagnostics of a cylindrical plasma.[3]Sov. Phys. Tech. Phys., 1976, 21(11): 1338-1343.[4]Vainshtein A, Ufimtsev P Ya. Virtual rays in the problem of diffraction from a wedge. Radiotekh. Elektron., 1982, 2(5): 625-633.[5]Alexopoulos N G, Franceschetti G, Jackson D R, Ufimtsev P Ya. Virtual rays and aplications[J].J. Opt. Soc. Am. A.1994, 11(4):1513-1527[6]Mafiuzhinets G D. Excitation,reflection and emission of surface waves from a wedge with given face impedances. Sov. Phys. Dokl., 1958, 3(6): 752-755.[7]Courant R, Hilbert D. Methods of Mathematical Physics. New York: McGraw-Hill, 1954, 76.[8]Tiberio R, Pelosi G, Manara G. A uniform GTD formulation for the diffraction by a wedge with impedance faces. IEEE Trans. on AP, 1985, AP-33(8): 867-873. -
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