双频微型贴片天线的h-mrtd模拟---------外文翻译.doc

Abstract: A novel MEMS dual-band patch antenna is designed using slot-loaded and short-circuited size-reduction techniques. By controlling the short-plane width , f10 and f 30 , two resonant frequencies, can be significantly reduced and the frequency radio ( f30/ f10) is tunable in the range 1.7～2.3.The Haar-Wavelet-Based multiresolution time domain (H-MRTD) is used for modeling and analyzing the antenna for the first time. In addition , the mathematical formulae are extended to an inhomogenous media. Numerical simulation results are compared to those achieved using the conventional 3-D finite-difference time-domain (FDTD) method and measured. It has been demonstrated that , with this technique , space discretization with only a few cells per wavelength gives accurate results , leading to a reduction of both memory requirements and computation time.
Key words : dual-frequency antenna; H-MRTD method ; FDTD method ; MEMS; UPML absorbing boundary conditions
摘要：利用槽隙加截及短接技术设计了双频小型微带天线。通过调节短接面宽度，两谐振频率f10及f30可明显降低，天线尺寸显著减小，而且频比（f30/f10）的可调范围为1.7～2.3。首次将三维H-MRTD（Haar-Wavelet-Based Multiresolution Time Domain）全波分析方法应用于该天线的建模和分析，并将H-MRTD数值计算公式推广到了非均匀有耗媒质中。数值模拟结果同传统FDTD（Finite Difference Time Domain）方法及实验结果进行了比较。结果表明，每个波长只需取较少的空间离散网格，三维H-MRTD时域全波分析方法便能较精确地模拟微机械微带天线，并能有效地减少CPU计算时间及节省计算机内存。
关键词：双频天线；H-MRTD方法；FDTD方法；微机械；UPML吸收边界条件
中图分类号：TN823 文献标识码：A
1 引言1
最近，贴片天线的研究已经聚焦于减小贴片的尺寸，这对于商业和军事应用非常重要。据显示，在共振模电场为0的地方引进一个短路面或一个部分短路面[1-3]，或者在反馈点附近引进一个短针[4]，这样就可以显著减小微带天线的谐振频率。使用双栈短路贴片可以获得双频解[5]。然而，使用堆栈存储