Propagation Characteristics of Metal Circular Waveguide Filled with Multilayer Reciprocal Chiral Media
-
摘要: 采用分离变量法,导出了填充多层互易手征介质的圆波导的模式特征方程,进而可得填充普通介质的圆波导的模式特征方程.为揭示填充多层互易手征介质圆波导的传播特性,给出了填充1层和2层互易手征介质圆波导部分模式的色散特性数值计算结果.结果表明,影响圆波导传播特性的主要因素是互易手征介质的折射率;当互易手征介质的磁导率变化,而折射率、手征参数和2层介质的半径之比不变时,其归一化截止频率明显变化;当2层互易手征介质参数不变,改变它们的半径之比时,对其低次模归一化截止频率影响很小,因此,想通过改变2层互易手征介质的半径之比达到显著改变其低次模归一化截止频率和归一化带宽不可取.Abstract: With the method of separation of variables,the general mode eigenequation of the metal circular waveguide filled with multilayer reciprocal chiral media was given.From the general eigenequation,the mode eigenequation of metal circular waveguide filled with an ordinary medium can be obtained.To reveal the propagation characteristics,numerical results for some modes in the metal circular waveguide filled with one or two layers of reciprocal chiral media were presented.The research results show that the main factor influencing the propagation characteristics is the refractive index of the reciprocal chiral media filled in it.When the permeability of the reciprocal chiral media filled in it is changed but the refractive index,chiral parameters and the ratio of the outer radii of the first and the second layers are given,the normalized cut-off frequency will obviously change.When the parameters of the reciprocal chiral media filled in it are given but the ratio of the outer radii of the two layers is changed,the normalized cut-off frequency of low-order modes changes slightly.Therefore,changing the ratio of the outer radii of the two layers is not a good approach to change the normalized cut-off frequency of low-order modes and normalized bandwidth of the metal circular waveguide.
-
沈忠祥.涂覆各向异性复合手征介质的阻抗圆柱体的雷达截面积[J].电子科学学刊,1994,16(6):623-630.SHENG Zhongxiang.Radar cross-section of an impedance of cylinder loaded with a composite and anisotropic chiral medium sheath[J].Journal of Electronics,1994,16(6):623-630.[2] 尹光俊,赵良,廖绍彬,等.单层手征性平板微波吸波体[J].北京大学学报(自然科学版),1995,31(5):563-570.YIN Guangjun,ZHAO Liang,LIAO Shaobin,et 81.Single layer chiral plate microwave absorber[J].Acts Scientiarum Naturalium Universitatis Pekinensis,1995,31 (5):563-570.[3] 赵惠玲,万伟,尹文言.矩形手征微带天线的辐射特性[J].电子学报,1997,25(3):94.97.ZHAO Huiling,WAN Wei,YIN Wenyan.The radiation characteristics of rectangular chirostrip antenna[J].Acts Electronics Siniea,1997,25(3):94-97.[4] 尹文言.单层和双层手征微带偶极子天线的辐射特性[J].系统工程与电子技术,1993,15(3):7-13,6.YIN Wenyan.Radiation characteristics of one and two layers chirostrip dipole antenna[J].Systems Engineering and Electronics,1993,15(3):7-13,6.[5] ENGHETA N,PELET P.Surface waves in chiral layers[J].Optics Letters,1991,16(11):723-725.[6] 尹文言,刘学观.手征平板介质波导中的场分析[J].电子学报,1992,20(3):84-86.YIN Wenyan,LIU Xueguan.Fields analysis of slat dielectric chirowaveguide[J].Acts Eleotroniea Sinica,1992,20(3):84-86.[7] EFTIMIU C,PEARSON L W.Guided electromagnetic waves in chiral media[J].Radio Sci.,1989,24(3):351-359.[8] ENGHETA N,PELET P.Modes in chirowaveguides[J].Optics Letters,1989,14(11):593-595.[9] ENGHETA N,PELET P.Mode orthogonality in chirowavcguides[J].lEEE Trans.Microwave Theory Tech.,1990,38(11):1631-1634.[10] PELET P,ENGHETA N.The theory of chirowaveguides[J].IEEE Trans.Antennas Propatat.,1990,38(1):90-98.[11] SINGH A K,SINGH K H S,KHASTGIR P,et al.Modal cutoff condition of an optical chiral fiber with different chirolities in the core and the cladding[J].J.Opt.Soc.Am.B,1994,11(7):1283-1287.[12] MAHMOUD S F.Guided modes on open chirowavegnides[J].IEEE Tram.Microwave Theory Tech.,1995,43 (1):205-209.[13] QIU R C,LU I T.Dispersion in ehiral optical fibres[J],IEE Prec.Optcelectron.,1998,145(3):155-158.[14] 董建峰.单模手征光纤研究[J].光学学报,2001,21(5):560-562.DONG Jianfcng.Study of the single-mode operation in chiral optical fibers[J].Acts Optical Sinica,2001,21 (5):560-562.[15] 兰康,赵愉深,林为干.部分填充手征媒质的圆波导的截止频率[J].电子科技大学学报,1994,23(5):468-471.LANG Kang,ZHAO Yushen,LIN Wcigan.Cutoff frequency of a circular wavegnide partially filled with ehiral material[J].J of UEST of China,1994,23(5):468-471.[16] 熊天信,邓洪.手征类介质的本构关系[J].自然科学研究,2006,4(2):73-79.XIONG Tianxin,DENG Hong.Constitutive relations of the chiral medium[J].Natural Science Research,2006,4(2):73-79.[17] 沈忠祥.多层手征介质填充圆波导的分析[J].电子科学学刊,1993,15(5):546-550.SHENG Zhongxiang.Analysis of circular waveguidc filled with multilayer chiral media[J].Journal of Eleetronics,1993,15(5):546-550.[18] SIHVOLA A H,LINDELL I V I.Bi-isotropic constitutive relations[J].Microwave and Optical Technology Letters,1991,4(8):295-297.[19] KONG J A.Electromagnetic wave theory[M].Massachusetts:EMA Publishing,2005:441-446.
点击查看大图
计量
- 文章访问数: 1333
- HTML全文浏览量: 54
- PDF下载量: 346
- 被引次数: 0