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针对双孔电波法的实际情况,研究无限有耗媒质中,在半波偶极天线激励下,存在导电异常体的散射问题。理论上是根据等效源定理在散射体内引入等效电流,利用并失格林函数建立电场的积分方程并将其化为矩阵方程。在数值计算中,精心设计计算机程序,为提高计算精度,采取小圆柱体作为剖分单元。从物理角度对积分方程奇异点做巧妙的处理。经多次试算,结果令人满意。从而证明本文提出的理论和计算方法的有效性和适用性。
According to the actual situation of the two-hole radio wave method, the problem of scattering of the conductive anomalies exists under the excitation of the half-wave dipole antenna in the infinite lossy medium. In theory, the equivalent current is introduced into the scatterer based on the equivalent source theorem, and the integral equation of the electric field is established by using the Green’s function and the matrix equation is reduced. In numerical calculation, carefully designed computer programs, in order to improve the calculation accuracy, take a small cylinder as a subdivision unit. From the physical point of view of the singular points of integral equations do clever handling. After many trials, the results are satisfactory. Which proves the validity and applicability of the theory and calculation method proposed in this paper.