单层和双层手征介质柱域的并矢格林函数理论及其应用
THE DYADIC GREEN S FUNCTION THEORY FOR ONE/TWO CYLINDRICAL LAYERS OF CHIRAL MEDIUM AND ITS APPLICATIONS
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摘要: 本文应用散射叠加法,分别导出了单层和双层手征介质圆柱区域中的并矢格林函数。由此分析了位于手征介质圆柱和手征介质圆柱罩中心轴线上点偶极天线的辐射特性。结果表明,通过改变手征介质圆柱的尺寸和手征介质圆柱罩的厚度,可以任意调节辐射场的极化特性。另外,本文给出的并矢格林函数公式还可用于分析柱形手征微带天线的辐射特性。Abstract: The expression of dyadic Green s function for one and two cylindrical layers of chiral medium are derived by using the method of scattering superposition, for which the electric current sources are placed both inside and outside of a chiral cylinder and a cylindrical chirodome. Then the radiation characteristics of a point dipole antenna on the axis of the chiral cylinder and cylindrical chirodome are analysed. The results show that the polarized states of radiated fields can be changed by choosing the size of chiral cylinder or the thickness of cylindrical chirodome. Also, the expressions of dyadic Green's function given in thid paper can be directly use to analyse the radiation characteristics of cylindrical chirostrip antenna.
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Ali M J. Opt. Soc. Am. A, 1992. 9(3): 413-423.[2]Yin Wenyan, Wang Wenbing. The Eigenfunetion Expansions of Dyadic Greens Function in Unbounded Chiral Medium and Applications. Proceeding, of International Symposium on Antennas and EM Theory, Xian: Oct. 1992, 21-25.[3]Lakhtakio A J. Int. Electron., 1991, 7(1):139-144.[4]Engheta N, et el. J. Appl. Phys., 1990, 67(2):639-647.[5]Jaggard D L, et al. Electron[J].Lett.1989, 15(3):173-174 -
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