双层手征介质板中电偶极天线的辐射特性
THE RADIATION CHARACTERISTICS OF ELECTRIC DIPOLE ANTENNA IN TWO-LAYER CHIRAL SLABS BOUNDED BY A PERFECTLY CONDUCTING PLANE
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摘要: 本文首先给出了电流源激励下双层手征介质中的并矢格林函数表达式。应用鞍点积分法，导出了有金属板衬底的双层手征介质中电偶极天线的辐射场表达式。分析了有、无空气隙时手征导纳对电偶极天线的方向图，＝0方向的最大场强和谐振频率的影响程度。结果表明，通过改变手征导纳参数，可以有效地调节电偶极天线的辐射特性。
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关键词:
- 电偶极天线;手征介质;手征导纳;方向图
Abstract: The formulas of dyadic Greens function for two-layer chiral electric dipole antenna are derived at first, and using the method of saddle-point integration,the expression of radiation field of electric dipole antenna is also derived. The ef fects of chirality admittance on the radiation pattern, maximum fields in the direction ＝0and resonance frequencies are examined. The results show that chiral media have potential applications in antenna areas. -
Engheta N, et al. Microwave and Optical Technology Letters, 1992,5(1):31-34.[2]Toacano A, et al. J. Elect. Waves and Applic., 1992, 6(5/6): 751-759.[3]尹文言,等.电波科学学报,1993,(1): 29-36.[4]钟顺时.微带天线理论和应用.西安:电子科技大学出版社,1991年6月. -
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