Suppression of Parallel Plate Modes Using Edge-Located EBG Structure in High-Speed Power Bus

Jonghyun Cho, Myunghoi Kim
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引用次数: 1

Abstract

An edge-located electromagnetic bandgap (EL-EBG) structure using a defected ground structure (DGS) is proposed to suppress resonant modes induced by edge excitation in a two-dimensional planar parallel plate waveguide (PPW). The proposed EL-DGS-EBG PPW significantly mitigates multiple transverse-magnetic (TM) modes in a wideband frequency range corresponding to an EBG stopband. To verify the wideband suppression, test vehicles of a conventional PPW, a PPW with a mushroom-type EBG structure, and an EL-DGS-EBG PPW are fabricated using a commercial process involving printed circuit boards (PCBs). Measurements of the input impedances show that multiple resonant modes of the previous PPWs are significantly excited through an input port located at a PPW edge. In contrast, resonant modes in the EL-DGS-EBG PPW are substantially suppressed over the frequency range of 0.5 GHz to 2 GHz. In addition, we have experimentally demonstrated that the EL-DGS-EBG PPW reduces the radiated emission from −24 dB to −44 dB as compared to the conventional PPW.
利用边缘定位EBG结构抑制高速电力母线中平行板模态
提出了一种利用缺陷接地结构(DGS)的边缘定位电磁带隙(EL-EBG)结构来抑制二维平面平行板波导(PPW)中边缘激发引起的谐振模式。提出的EL-DGS-EBG PPW在与EBG阻带对应的宽带频率范围内显著减轻了多个横磁(TM)模式。为了验证宽带抑制效果,采用涉及印刷电路板(pcb)的商业工艺制作了传统PPW、蘑菇型EBG结构PPW和EL-DGS-EBG PPW的测试车。输入阻抗的测量表明,通过位于PPW边缘的输入端口,先前PPW的多个谐振模式被显著激发。相比之下,EL-DGS-EBG PPW的谐振模式在0.5 GHz到2 GHz的频率范围内被明显抑制。此外,我们还通过实验证明,与传统的PPW相比,EL-DGS-EBG PPW将辐射发射从- 24 dB降低到- 44 dB。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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