【摘要】 为了解决印制电路板中由同步开关噪声(simultaneous switching noise,SSN)引起的高速电路信号完整性问题,通过把传统S桥相邻单元电磁带隙结构连接线的直线改为折线并采用多缝隙的单元结构,设计了一种新型S桥电磁带隙结构(electromagnetic band gap,EBG)。利用Ansoft HFSS软件对该EBG结构进行了数据仿真,并进行了电路实物的加工与测试,仿真结果与实测结果良好吻合。在抑制深度为-30 d B时,其阻带范围为0.2~9.8 GHz,相对阻带宽度为192%,与传统S桥EBG结构相比阻带宽度增加了2.8 GHz,可以更好地抑制同步开关噪声。更多还原

【Abstract】 In order to solve the signal integrity issue caused by the simultaneous switching noise( SSN) in high speed circuits on PCB,a novel S-bridge electromagnetic band gap structure is proposed,which changes the straight line of traditional S-bridge adjacent unit of electromagnetic band gap( EBG) into meander one and adds the multislit units. The new EBG structure was simulated by using the software of HFSS. The realistic EBG structure was fabricated and tested. The measurement results are well consistent with the simulation data. When the inhibition of depth is set to- 30 d B,the stop band ranges from 0. 2 GHz to 9. 8 GHz and the relative suppression bandwidth is192%. Compared with the traditional S-bridge EBG structure,the suppression bandwidth of new EBG increases by2. 8 GHz. Consequently,it will be better for suppressing SSN.更多还原