單層和雙層手征介質(zhì)柱域的并矢格林函數(shù)理論及其應(yīng)用
THE DYADIC GREEN S FUNCTION THEORY FOR ONE/TWO CYLINDRICAL LAYERS OF CHIRAL MEDIUM AND ITS APPLICATIONS
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摘要: 本文應(yīng)用散射疊加法,分別導(dǎo)出了單層和雙層手征介質(zhì)圓柱區(qū)域中的并矢格林函數(shù)。由此分析了位于手征介質(zhì)圓柱和手征介質(zhì)圓柱罩中心軸線上點偶極天線的輻射特性。結(jié)果表明,通過改變手征介質(zhì)圓柱的尺寸和手征介質(zhì)圓柱罩的厚度,可以任意調(diào)節(jié)輻射場的極化特性。另外,本文給出的并矢格林函數(shù)公式還可用于分析柱形手征微帶天線的輻射特性。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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