【作者】 黄伟芳；

【导师】 刘其中；

【作者基本信息】 西安电子科技大学 ， 电磁场与微波技术， 2006， 硕士

【摘要】 在实际电磁工程中，针对电大尺寸导体附近的天线性能分析问题，我们常常追求的目标是：能够在保持一定的计算精度的同时达到快速分析的目的，或者在牺牲较小的内存及计算时间的情况下，达到较好的计算精度。矩量法(MoM)是一种低频方法，在高频范围内，计算量的增大限制了其应用，因此MoM仅适合于分析电小尺寸的天线。一致性几何绕射理论(UTD)作为一种高频方法，它在把天线等效为点源解决天线问题时，必须已知天线的辐射方向图。本文采用MoM与UTD相结合方法进行预测分析。在大量理论分析的基础上，编制了通用程序，对几个典型例子进行了数值计算，所得结果与商用软件(FEKO)仿真结果吻合良好，验证了该方法的准确性和有效性，说明该方法可分析更加复杂的电大尺寸导体目标。更多还原

【Abstract】 In practical electromagnetic project, the analysis of antenna with electrically large conductor is a common problem. Our aim is to fast analyze under some numerical precision or to achieve better numerical precision under the use of the less computing resources. We refer to the method of moments (MoM) as a low-frequency technique. In high frequency range, it is significantly limited by computer storage, so its practical use is generally restricted to bodies that are not large in terms of the wavelength. On the other hand, uniform theory of diffraction (UTD) may be referred to as high frequency technique. It requires a known antenna radiation patterns when it solves antenna problems by regarding antenna as point sources. MoM combined with UTD is studied in this thesis. On the basis of a great deal theory analysis, a universal program is organized and some typical examples are computed numerically, the results of which are in good agreement with the software results. The accuracy and efficiency of this method is proved, which guarantees the more complex electrically large conductor can be analyzed by this method.更多还原