Analysis of electromagnetic scattering from a cavity with a complex termination by means of a hybrid ray-FDTD method
Analysis of electromagnetic scattering from a cavity with a complex termination by means of a hybrid ray-FDTD method
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DOI：
10.1109/8.267356
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发表时间：
1993-11
影响因子：
5.7
通讯作者：
R. Lee;T. Chia
中科院分区：
文献类型：
--
作者：
R. Lee;T. Chia
发动机空腔的电磁建模是一项非常困难的工作，因为空腔的电尺寸非常大，而发动机端部的几何结构非常复杂。高频技术可以充分模拟空腔，但应用于终端时表现不佳。低频技术目前对于如此大的几何形状是不可行的，因为需要大量的内存和计算时间。作者提出了一种混合方法，结合了低频和高频技术的最吸引人的特点。时域有限差分（FDTD）方法应用于终端周围的小区域。用射线法对腔体的其余部分进行建模。为了验证这一方法，他们考虑了具有复杂终端的二维空腔。将其结果与模态法和矩量法的混合组合所得结果进行了比较。>
The electromagnetic modeling of engine cavities is a very difficult task because the electrical size of the cavity is very large, while the engine termination is geometrically complex. High-frequency techniques can adequately model the cavity, but perform poorly when applied to the termination. Low-frequency techniques are currently infeasible for such large geometries because of the large memory and computation time requirements. The authors present a hybrid method which combines the most attractive features of the lowand high-frequency techniques. The finite-difference time-domain (FDTD) method is applied to the small region surrounding the termination. The remainder of the cavity is modeled with ray methods. To validate this method, they consider two-dimensional cavities with complex terminations. Their results are compared against those found from a hybrid combination of the modal method and the method of moments. >