Analysis of a UWB Hemispherical Antenna Array in FDTD With a Time Domain Huygens Method
Analysis of a UWB Hemispherical Antenna Array in FDTD With a Time Domain Huygens Method
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DOI：
10.1109/tap.2012.2207670
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发表时间：
2012-07
影响因子：
5.7
通讯作者：
C. Christodoulou;C. Railton;M. Klemm;D. Gibbins;I. Craddock
中科院分区：
文献类型：
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作者：
C. Christodoulou;C. Railton;M. Klemm;D. Gibbins;I. Craddock
在各种大而复杂的情况下，需要建立电磁模型。现有的数值技术，如时域有限差分(FDTD)，原则上可以解决任何问题，无论有多大或多复杂，只要有足够强大的计算机。然而，在实践中，仍然存在需要比可用的计算机能力更多的问题。最近，时域惠更斯(TDH)方法被证明是有效的，使得在身体区域网络(BANS)上的传播等大问题能够用FDTD来建模。本文指出，在MARIA乳腺癌肿瘤检测系统中使用的共形天线阵的更大问题也非常适合于这种技术，并且节省了更多的计算机资源。使用现有的高级FDTD工具解决相同问题所需的资源不到十分之一，即可获得准确的结果。讨论了如何应用这种方法的细节，以及需要做出的选择。
Electromagnetic modeling is needed in a wide variety of large and complex situations. Existing numerical techniques such as finite difference time domain (FDTD) can, in principle, solve any problem no matter how large or complicated given a sufficiently powerful computer. However, in practice, there remain problems which require more computer power than is available. Recently, the time-domain Huygens (TDH) approach has been shown to be effective for enabling large problems such as propagation on body area networks (BANs) to be modeled in FDTD. In this paper, it is shown that the much larger problem of the conformal antenna array, which is used in the MARIA breast cancer tumor detection system, is also very amenable to this technique with even greater savings in computer resources. Accurate results are obtained using less that a tenth of the resources needed to solve the same problem using existing advanced FDTD tools. The details of how this method is applied, and the choices which need to be made, are discussed.