基于螺旋谐振环结构的UWB同步开关噪声抑制电源平面

针对目前印制电路板中采用的同步开关噪声抑制方法抑制带宽较窄、全向性较差、电源平面有效使用面积小、结构复杂及对信号质量影响大的问题,提出了一种基于螺旋谐振环结构的超宽带同步开关噪声抑制平面,具有结构简单、阻带宽、抑制方向具有全向性、无需周期性电磁带隙结构的特点。通过研究其等效电路模型,使用三维有限元法( FEM)对所设计的结构提取了S参数,并进行了频域与时域分析与仿真。仿真结果表明：所提出的结构其同步开关噪声抑制深度在-40 dB时,阻带范围为0.13~20 GHz,抑制带宽达到19.87 GHz,有效降低了带隙中心频率；当注入噪声电压为1 V时,可将噪声电压抑制到0.25 mV；对比UC-EBG和Planar EBG结构,在-40 dB抑制深度时,抑制带宽分别提高了16.97 GHz和17.73 GHz。

Ultra-wideband suppression of simultaneous switching noise using spiral resonator structure mounted power plane

To solve the limitations of existing methods of simultaneous switching noise( SSN) suppression, an ultra-wideband ( UWB ) suppression of SSN using spiral resonator structure mounted power plane is presented. By studying its equivalent circuit model,full-wave finite element method( FEM) is applied to analyze the power integrity both in frequency domain and time domain. The simulated results display that the SSN suppression bandwidth is broadened from 0 . 13 GHz to 20 GHz under a noise suppression margin of -40 dB, the SSN suppression characteristics are greatly improved in lower frequencies, approximately 16 . 97 GHz and 17 . 73 GHz of stopband bandwidth improvement over the conventional UC-EBG and pla-nar-EBG power plane,respectively. When noise frequency is 20 GHz,the amplitude is 1 V injected,the noise voltage is suppressed to 0. 25 mV.