CAD-oriented analysis of two types of surface wave bandstop filters

S. Boriskina, A. Nosich
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Abstract

The purpose of this study is to analyze numerically the interactions of a surface mode field with a circular cylindrical dielectric resonator and an open cavity with a circular cross section, and to discuss their applications as bandstop filters. In our treatment we take an impedance plane in the H-polarization mode as the simplest (single-mode) open waveguide. We follow at first the ideas presented by Yarovoy (1995) for the scattering from a dielectric cylinder immersed in a dielectric slab waveguide. However, the procedure of reducing the integral equations to a matrix equation differs from Yarovoy's point-matching method. Taking into account the scatterer's shape, we use the expansions in terms of entire-domain basis functions such as angular exponents.
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两种表面波带阻滤波器的cad分析
本研究的目的是数值分析表面模场与圆形圆柱形介质谐振器和圆形截面开腔的相互作用,并讨论它们作为带阻滤波器的应用。在我们的处理中,我们采用h偏振模式的阻抗平面作为最简单的(单模)开放波导。我们首先遵循Yarovoy(1995)提出的关于浸没在介质板波导中的介质圆柱体散射的思想。然而,将积分方程化为矩阵方程的过程与Yarovoy的点匹配方法不同。考虑到散射体的形状,我们使用全域基函数(如角指数)的展开。
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