提出一种新型超宽带电磁带隙结构,以抑制印刷电路板(PCB)上的同步开关噪声.基于电磁带隙结构的理论分析和设计,对新型电磁带隙结构的阻带特性及信号完整性进行了仿真分析.仿真结果表明,与相同参数的Z型桥电磁带隙结构比较,新型电磁带隙结构的阻带带宽提高,下截止频率降低;同时使用差分线对传输信号时,新型电磁带隙结构电源平面保持了较好的信号完整性. A novel ultra-wideband electromagnetic bandgap structure is proposed to suppress the synchronous switching noise on the printed circuit board (PCB) .Based on the theoretical analysis and design of the electromagnetic bandgap structure, the characteristics of the stop band and the signal integrity of the novel electromagnetic bandgap structure Simulation results show that compared with the Z-bridge electromagnetic bandgap structure with the same parameters, the new electromagnetic bandgap structure increases the stopband bandwidth and the lower cutoff frequency decreases. At the same time, when the differential signal is used to transmit the signal, a new type of electromagnetic tape Gap structure power plane to maintain a better signal integrity.