A TETRAHEDRAL MODELING METHOD FOR ELECTROMAGNETIC SCATTERING BY ARBITRARILY SHAPED INHOMOGENEOUS DIELECTRIC BODIES
A TETRAHEDRAL MODELING METHOD FOR ELECTROMAGNETIC SCATTERING BY ARBITRARILY SHAPED INHOMOGENEOUS DIELECTRIC BODIES
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DOI：
10.1109/tap.1984.1143193
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发表时间：
1984-01-01
影响因子：
5.7
通讯作者：
GLISSON, AW
中科院分区：
文献类型：
--
作者：
SCHAUBERT, DH;WILTON, DR;GLISSON, AW
本文提出了一种计算任意形状非均匀介质体的电磁散射和内场分布的方法。建立了体积积分方程，并采用矩量法求解。四面体元被用来模拟散射体，其中每个四面体中的电参数被假定为常数。特殊的基函数定义在四面体体积元，以确保正常的电场满足正确的跳跃条件，在不同的电介质之间的界面。一个近似的伽辽金测试程序，特别注意正确处理的标量位项的衍生物。计算的内场分布和散射截面的介质球和杆进行了比较，并发现与其他计算协议。通过使用四面体细胞的方法计算的字段的准确性被发现是可比的立方细胞的方法，目前用于建模任意形状的机构，而建模的灵活性是相当大的。
A method for calculating the electromagnetic scattering from and internal field distribution of arbitrarily shaped, inhomogeneous, dielectric bodies is presented. A volume integral equation is formulated and solved by using the method of moments. Tetrahedral volume elements are used to model a scattering body in which the electrical parameters are assumed constant in each tetrahedron. Special basis functions are defined within the tetrahedral volume elements to insure that the normal electric field satisfies the correct jump condition at interfaces between different dielectric media. An approximate Galerkin testing procedure is used, with special care taken to correctly treat the derivatives in the scalar potential term. Calculated internal field distributions and scattering cross sections of dielectric spheres and rods are compared to and found in agreement with other calculations. The accuracy of the fields calculated by using the tetrahedral cell method is found to be comparable to that of cubical cell methods presently used for modeling arbitrarily shaped bodies, while the modeling flexibility is considerably greater.