求中译／英译： 中翻英 介质共振器天线(DRA)比起传统微带天线有许多吸引人的特性，像是尺寸小、低姿态 、轻、容易激发，在高频段拥有高辐射效率。随着DRA受到越来越多的注目，理论分析已经 不足以满足人们对於分析介质共振器的需求。 Dielectric resonator antennas offer some attractive characteristics over conventional microstrip antennas, such as small size, low profile, light weight, ease of excitation, and high radiation efficiency at higher frequency. Since DRAs attract more and more attention, theoretical analysis has been insufficient to simulate various configurations of dielectric resonator antennas. 因而许多研究人员以数值分析的方法，如有限时域差分法(FDTD)、动差法(MoM)、 有限元素法(FEM)等方法来分析模拟介质共振器天线。本论文说明比较了FDTD与MoM在模拟 DRA上的差异性，并以FDTD去模拟分析各种不同结构的DRA。 Therefore some researchers introduce numerical methods to analysis DRAs, such as Finite Difference Time Domain (FDTD) method, Method of Moment (MoM), Finite Element Method (FEM). In this author, we compare the difference between FDTD and MOM when it applied to analysis DRAs. Then we simulate various configurations of dielectric resonator antennas using FDTD method. 对於DRA设计方面，本文以理论近似公式求得DRA尺寸的概略值，并以FDTD做精确的 分析，最後本文实际去设计一个工作在5.8GHz的DRA，并以一种L形微带线来增大DRA的阻 抗频宽。由以上的研究希望能建立出快速且准确的一套程序来求得DRA的共振频率、工作频宽 与远场场形图，以缩短工程师设计DRA的时间。 When we design DRAs, in this author we applied a equivalent approach ^^^^^^^^^^^^^^^^^^^^ 不知道怎翻先乱翻 xddd to solve a approximate dimensions of DRAs, and then we get a accurate dimensions by FDTD method. In this author，a DRA work in 5.8GHz have been proposed, then we using a L-shaped patch to increase impedance bandwith. Above all, we hope to built a fast and accurate procedure to solve the resonant frequency, bandwidth, and far field pattern of DRAs. And to supply the engineer to reduce time consume in design DRAs. 提问：希望有人可以帮忙定正一下 感谢~~~ --

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