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首页> 外文期刊>Radio Science >Efficient integral equation formulation of diffraction at the edge of a truncated dielectric structure based on PO solutions: Application to the case of arbitrarily polarized line sources
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Efficient integral equation formulation of diffraction at the edge of a truncated dielectric structure based on PO solutions: Application to the case of arbitrarily polarized line sources

机译:基于PO解的截断介电结构边缘的高效衍射积分方程公式:在任意极化线源情况下的应用

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摘要

The radiation patterns of electric and magnetic line sources placed near the truncation of a semi-infinite grounded dielectric layer structure have been investigated. Two polarizations (parallel and normal to the edge) have been considered for both sources. In order to perform the analysis a new formulation is proposed for the aperture integral equations derived from the principle of equivalence. The novelty of this formulation is that it involves only the fringe components of the magnetic current. The total magnetic current flowing on the aperture is expressed in terms of the physical optics (PO) current and the fringe current. Although the PO current is not known analytically, we can calculate the field excited by this current using the relationship between the surface magnetic PO current on the aperture and the electric polarization PO current in the grounded dielectric slab. The latter PO current is approximated analytically by the expansion wave concept. This step opens a simple and effective way to calculate the right part of the integral equations and as a consequence the radiation pattern of the line sources. For comparison reasons the problem is solved also by using the method of Physical Optics and the Uniform Theory of Diffraction.
机译:研究了位于半无限接地的电介质层结构的截断附近的电线和电磁线源的辐射方向图。对于两个光源,都考虑了两个极化(平行和垂直于边缘)。为了进行分析,为等效原理的孔径积分方程提出了新的公式。该公式的新颖性在于它仅涉及磁流的边缘分量。在孔上流动的总磁电流用物理光学(PO)电流和边缘电流表示。尽管PO电流在分析上未知,但我们可以使用孔上的表面磁PO电流与接地电介质板中极化PO电流之间的关系来计算由该电流激发的场。后者的PO电流由扩展波概念解析近似。此步骤打开了一种简单有效的方法来计算积分方程的正确部分,从而计算出线源的辐射方向图。出于比较的原因,该问题也可以通过使用物理光学方法和均匀衍射理论来解决。

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