In this article, a novel double-square planar electromagnetic bandgap structure for suppressing wideband simultaneously switching noises is proposed. The equivalent circuit model for its periodic structure design is carefully developed and analyzed for the function as a band-stop filter. The performance of the circuit model is experimentally verified and lower cutoff frequency $(f_{L})$ can be effectively predicted, while keeping the compact size of the structure. Two test boards are fabricated and the measurement results show that the noise suppression performance can reach –30 dB between two adjacent ports from 3.2 to 21.2 GHz. To prove the solid signal transmission quality of the proposed structure in high-speed printed circuit board, feasibility studies on eye patterns are conducted at four different coded rates. All the performance results and the comparison with other works show its salient feature of solid signal integrity in both the frequency and time domains.

中文翻译：

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一种用于高速PCB中宽带SSN抑制的新型双方形电磁带隙结构

在本文中，提出了一种用于抑制宽带同时开关噪声的新型双方形平面电磁带隙结构。其周期结构设计的等效电路模型经过精心开发和分析，以实现带阻滤波器的功能。电路模型的性能经过实验验证，可以有效预测较低的截止频率 $(f_{L})$，同时保持结构的紧凑尺寸。制作了两块测试板，测量结果表明，在3.2-21.2 GHz的两个相邻端口之间，噪声抑制性能可以达到–30 dB。为了证明所提出的结构在高速印刷电路板中的可靠信号传输质量，在四种不同的编码速率下对眼图进行了可行性研究。