双层同轴圆柱形磁性体的散射及反射场研究  

Scattering and reflecting electromagnetic field of coaxial double deck cylindrical magnetic substance

作　　者：王华英[1] 

机构地区：[1]河北工程学院数理系,河北邯郸056038

出　　处：《哈尔滨工业大学学报》2004年第1期106-108,共3页Journal of Harbin Institute of Technology

摘　　要：根据电磁场理论,利用理论解析和数值计算的方法,分析了平面波入射时双层同轴圆柱形磁性体中的磁场、磁通分布及其散射场的特性,提出了改善法向模螺旋天线的建议。数值计算结果表明:在天线器内部填充均匀磁性材料可改善天线性能;当天线器内部为双层磁性介质,且二者磁导率有显著差异时,选择合适的半径可抑制反射场。The characteristics of magnetic field and magnetic flux distribution and scattering field in the coaxial double-deck cylindrical magnetic substance is studied using the theory of electromagnetic field, and two suggestions are made to improve the characteristics of normal helical antenna using theoretical analysis and numerical calculation. One of the suggestions is to increase magnetic flux by filling in the antenna with the symmetrical magnetic substance. The other is to restrain the reflecting field by selecting a suitable radius as filling with the double-deck magnetic substances, which have great differences in permeability.

关 键 词：双层同轴圆柱形磁性体 电磁场 磁通量 磁导率 散射场 法向模螺旋天线 

分 类 号：TN823.31[电子电信—信息与通信工程]