任信钢、赵亚莉、孙国星、饶嘉宇、王刚、牛凯坤、吴先良、黄志祥、李迎松，一种超宽带电磁带隙结构及电路板，专利授权号：ZL. 202311068387X，专利授权日期2023.11.24

Ren Xingang, Zhao Yali, Sun Guoxing, Rao Jiayu, Wang Gang, Niu Kaikun, Wu Xianliang, Huang Zhixiang, Li Yingsong. An ultra-wideband electromagnetic bandgap structure and circuit board. Patent Authorization Number: ZL. 202311068387X. Patent Authorization Date: 2023.11.24

本发明提供的一种超宽带电磁带隙结构，包括：阵列设置的多个电磁带隙单元；每个所述电磁带隙单元包括从上到下依次设置的电源平面、介质基板和接地平面；所述电源平面包括贴片、耦合互补分裂环谐振器和多个半改进Z型桥结构；所述贴片上嵌入耦合互补分裂环谐振器；所述贴片的每条边均设置半改进Z型桥结构；所述耦合互补分裂环谐振器设置在多个所述半改进Z型桥结构形成的环内；所述半改进Z型桥结构包括依次连接的第一横枝、第一竖枝、第二横枝和第二竖枝；所述第二竖枝与所述贴片连接；所述第一横枝与所述第二横枝平行；所述第一竖枝与所述第二竖枝平行；所述第一横枝与所述第一竖枝垂直；相邻所述电磁带隙单元的第一横枝相互连接。通过相邻电磁带隙单元的半改进Z型桥结构形成的Z型桥来增加单元间的串联电感，从而起到阻带作用，利用半改进Z型桥结构和耦合互补分裂环振器产生的感应电感，从而谐振环之间产生缝隙电容，进而有效抑制同步开关噪声。

This invention provides an ultra-wideband electromagnetic bandgap structure, comprising: an array of multiple electromagnetic bandgap units; each said electromagnetic bandgap unit includes a power plane, a dielectric substrate, and a ground plane set sequentially from top to bottom; the power plane comprises a patch, a coupled complementary split-ring resonator, and multiple semi-modified Z-shaped bridge structures; the patch has the coupled complementary split-ring resonator embedded within it; each edge of the patch is equipped with a semi-modified Z-shaped bridge structure; the coupled complementary split-ring resonator is set within the ring formed by multiple semi-modified Z-shaped bridge structures; the semi-modified Z-shaped bridge structure includes a first horizontal branch, a first vertical branch, a second horizontal branch, and a second vertical branch connected in sequence; the second vertical branch is connected to the patch; the first horizontal branch is parallel to the second horizontal branch; the first vertical branch is parallel to the second vertical branch; the first horizontal branch is perpendicular to the first vertical branch; the first horizontal branches of adjacent electromagnetic bandgap units are interconnected. The bandstop effect is achieved by the Z-shaped bridges formed by the semi-modified Z-shaped bridge structures of adjacent electromagnetic bandgap units, which increase the series inductance between units. The inductive inductance generated by the semi-modified Z-shaped bridge structures and the coupled complementary split-ring resonators creates gap capacitance between the resonant rings, thereby effectively suppressing synchronous switching noise.