| 口径天线与近区厚介质体复杂系统的电磁建模 |
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| 引用本文： | 宋乃涛,聂在平,宗显政.口径天线与近区厚介质体复杂系统的电磁建模[J].强激光与粒子束,2015,27(10):103209. |
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| 作者姓名： | 宋乃涛 聂在平 宗显政 |
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| 作者单位： | 1.电子科技大学 微波工程系, 成都 61 1 731 |
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| 摘 要： | 针对口径天线及其近区任意厚均匀介质体的复杂系统,应用表面积分方程(SIE)方法结合模式匹配方法(MM)建立了模式激励的新型一体化电磁模型。在馈电端口采取模式匹配方法模拟了波导中的激励情况,将金属壁处理为理想导电体,并在金属壁上利用边界条件建立电场积分方程(EFIE);利用零场等效原理在介质体内外表面分别建立电场积分方程和磁场积分方程(MFIE),并组合内外表面建立的电场积分方程和磁场积分方程为PMCHW方程;最后使用矩量法对所建立的EFIE-PMCHW-MM组合方程进行求解。文中结合喇叭天线设计了两个典型算例,所提混合方法 EFIE-PMCHW-MM给出的数值结果与商用软件FEKO高度一致,且在求解口径天线与近区厚介质体耦合问题时由于未知量显著减少,大幅度提高了仿真效率,降低了计算机资源消耗。
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| 关 键 词： | 电场积分方程 PMCHW方程 模式匹配 喇叭天线 天线罩 |
| 收稿时间： | 2015-05-08 |
Electromagnetic modeling of aperture antenna with thick dielectric structure |
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| Affiliation: | 1.Department of Microwave Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China |
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| Abstract: | Surface integral equation (SIE) method combined with mode matching (MM) method is used to simulate the radiation problem of aperture antenna with dielectric structure. The mode matching method is used to describe the excitation model of the horn antenna. The metal wall of an aperture antenna is treated as a perfect electric conductor (PEC). The Electric Field Integral Equation (EFIE) is established on PEC. Both of the EFIE and the Magnetic Field Integral Equation (MFIE) are established on the surface which encloses the dielectric structure to form the PMCHW formulation. The combined formulations are solved by using the method of moment (MOM). Two typical numerical examples are given in this article. It shows that the results given by EFIE-PMCHW-MM hybrid method match well with the results given by commercial code FEKO. Furthermore, EFIE-PMCHW-MM hybrid method increases the calculation efficiency and decreases the computer resource consumption than VSIE-MM method. |
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