Calculation and experimental validation of induced currents on coupled wires in an arbitrary shaped cavity
Calculation and experimental validation of induced currents on coupled wires in an arbitrary shaped cavity
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DOI：
10.1109/tap.1987.1144000
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发表时间：
1987
影响因子：
5.7
通讯作者：
K. Umashankar;A. Taflove;B. Beker
中科院分区：
文献类型：
--
作者：
K. Umashankar;A. Taflove;B. Beker
本文提出了一种计算任意形状腔内受入射平面波激励的耦合导线和多导体束上感应电流的有效数值方法。该方法基于时域有限差分（FD-TD）公式。在FD-TD模型中，采用等效半径的概念将线束替换为单线束。然后，用改进的FD-TD时间步进表达式（基于法拉第定律轮廓路径公式）计算等效导线的半径，用于导线附近的环形磁场。然后获得完全包围等效导线的虚拟表面上的FD-TD计算场，允许使用标准电场积分方程（EFIE）计算原始束导线上的电流。大量的分析和实验验证了导线在自由空间和高Q金属腔中的时谐波和宽带激励。
An efficient numerical technique is presented for the calculation of induced electric currents on coupled wires and multiconductor bundles placed in an arbitrary shaped cavity and excited by an external incident plane wave. The method is based upon the finite-difference time-domain (FD-TD) formulation. The concept of equivalent radius is used to replace wire bundles with single wires in the FD-TD model. Then, the radius of the equivalent wire is accounted by a modified FD-TD time-stepping expression (based on a Faraday's law contour-path formulation) for the looping magnetic fields adjacent to the wire. FD-TD computed fields at a virtual surface fully enclosing the equivalent wire are then obtained, permitting calculation of the currents on the wires of the original bundle using a standard electric field integral equation (EFIE). Substantial analytical and experimental validations are reported for both time-harmonic and broad-band excitations of wires in free space and in a high- Q metal cavity.