虛光線法及其在阻抗尖劈的平面波散射中的應(yīng)用
VIRTUAL-RAY METHOD AND ITS APPLICATION IN THE PLANE WAVE SCATTERING BY AN IMPEDANCE WEDGE
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摘要: 本文從自由空間中的平面波出發(fā)導(dǎo)出了處理高頻電磁散射問(wèn)題的虛光線法,并用它研究了阻抗尖劈的平面波散射問(wèn)題。處理過(guò)程中引入了廣義圓的概念,從而得出了構(gòu)成解的完整的幅度函數(shù)。與此同時(shí),首次對(duì)求解過(guò)程中被忽略的一項(xiàng)作出了合理的物理解釋。計(jì)算結(jié)果與G.D.Maliuzhinets(1958)的解析解符合得很好。
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關(guān)鍵詞:
- 虛光線法; 阻抗尖劈的散射; 廣義圓; 幅度函數(shù)
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). -
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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