高速电路系统中平面型EBG与DGS的电源噪声抑制技术研究

发布时间：2018-02-02 04:25

本文关键词： 电源完整性信号完整性电源噪声电磁带隙缺陷地结构　出处：《哈尔滨工业大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着时钟速率的飞速提高,电源完整性、信号完整性以及电磁干扰等问题已经成为制约高速电路系统进一步发展的关键因素,其中电源完整性是所有高速电路不可忽视的问题。传统的电源噪声抑制技术主要采用不同种类的去耦电容,但这些电容已经无法抑制频率越来越高的电源噪声。电磁带隙结构(EBG)和缺陷地结构(DGS)等人工电磁材料可以很容易的工作在微波频段,因而正成为潜在的电源噪声抑制技术得到重视和研究。但是EBG和DGS等技术也存在一些问题,包括结构尺寸较大,容易引起信号完整性问题等。本文对共面型EBG和DGS在电源噪声抑制技术中的应用进行了研究,主要探究了降低EBG下限截止频率的设计方法和改善信号完整性的解决方案。首先,本文从典型EBG和DGS的基本构造出发,利用等效电路模型和传输线理论分析了他们的传输特性。针对EBG,利用等效电路模型和S参数直接提取得到了其带隙特性并讨论了EBG的结构参数对带隙的影响;对于DGS,借助S参数提取得到了其等效电路模型相关参数。等效电路模型的分析,为EBG和DGS的设计和改进提供了理论依据和指导。其次,本文从降低下限截止频率的角度提出了两种改进型的共面型EBG。两种改进型的EBG分别基于传统的UC-EBG和L-EBG单元,通过加载螺旋线连接桥和延长连接桥路径实现小型化。仿真结果表明两款EBG的下限截止频率分别下降了31.3%和46.3%。另外,针对平面型EBG容易引起信号完整性问题的缺点,提出了补充局部地轨和互补EBG两种改善信号传输质量的解决方案。最后,本文提出并探究了一种应用于电源噪声抑制的矩形螺旋线DGS,仿真和实验结果表明,该DGS具有下限截止频率低、带宽大且结构简单等诸多优点。同时,该DGS还最大程度地保留了参考平面的完整性,为良好的信号完整性提供保障;文章末尾通过对不同路径信号线的传输特性的讨论,给出了一些在加载DGS环境下的布线建议。
[Abstract]:With the rapid improvement of clock rate, power integrity, signal integrity and electromagnetic interference have become the key factors restricting the further development of high-speed circuit systems. The integrity of power supply is a problem that can not be ignored in all high speed circuits. The traditional power supply noise suppression technology mainly uses different kinds of decoupling capacitors. However, these capacitors can not restrain the increasingly high frequency of power noise. The electromagnetic band gap structure (EBG) and the defective ground structure (DGS) artificial electromagnetic materials can easily work in the microwave frequency. Therefore, it is becoming a potential power source noise suppression technology has been paid attention to and studied. However, there are some problems in EBG and DGS technology, including the larger structure size. This paper studies the application of coplanar EBG and DGS in power noise suppression technology. This paper mainly discusses the design method of reducing the lower limit cutoff frequency of EBG and the solution to improve the signal integrity. Firstly, this paper starts from the basic structure of typical EBG and DGS. Their transmission characteristics are analyzed by using equivalent circuit model and transmission line theory. The band gap characteristics are obtained by using the equivalent circuit model and S parameters, and the influence of the structure parameters of EBG on the band gap is discussed. For DGSs, the relevant parameters of equivalent circuit model are obtained with the help of S parameter extraction. The analysis of equivalent circuit model provides theoretical basis and guidance for the design and improvement of EBG and DGS. Secondly. In this paper, two kinds of improved coplanar EBGs are proposed to reduce the lower cutoff frequency. Two kinds of improved EBG are based on traditional UC-EBG and L-EBG units, respectively. Miniaturization is realized by loading helical connection bridge and extending connection bridge path. The simulation results show that the lower limit cutoff frequency of the two EBG is reduced by 31.3% and 46.3 respectively. In addition. Aiming at the shortcoming that plane EBG is easy to cause signal integrity problem, two solutions to improve the signal transmission quality are proposed, which are complementary local ground orbit and complementary EBG. In this paper, a rectangular spiral DGSs applied to power noise suppression is proposed and explored. The simulation and experimental results show that the DGS has many advantages, such as low cutoff frequency, large bandwidth and simple structure. The DGS also preserves the integrity of the reference plane to the greatest extent and provides a guarantee for the good signal integrity. At the end of the paper, through the discussion of the transmission characteristics of different path signal lines, some routing suggestions under loading DGS environment are given.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN86

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