基于电磁带隙结构的高速混合信号电路板噪声抑制  

Noise Suppression in High-speed Mixed-signal PCB Using Electromagnetic Band-gap

作　　者：申才立 陈瑞明[1] 王栋[1] 徐霄[1] 苏浩航[1] 

机构地区：[1]北京空间机电研究所,北京100094

出　　处：《航天返回与遥感》2016年第3期65-74,共10页Spacecraft Recovery & Remote Sensing

摘　　要：针对空间遥感相机发展特点以及高速混合信号集成电路的发展趋势,如何抑制电路板上的噪声成为目前研究的一个重要方向。文章在分析传统的去耦电容降噪方法和最新的电磁带隙结构降噪原理的基础上,提出了一种新型的电磁带隙结构来抑制电路板上的噪声;通过对该电磁带隙结构的仿真,得出此结构能够在一定程度上降低电路板上的噪声;在此基础上,文章更进一步设计了基于该电磁带隙结构的应用电路板进行实验验证;通过对电路板上测量的噪声数据对比分析,验证了该结构降噪的有效性,其中噪声的均方根值平均降低幅度为27.96%;最后针对一款实际应用的CCD相机成像电路板,通过对比测量成像后图像信噪比数据,得出使用该新型电磁带隙结构时,CCD成像的信噪比有了一定程度的提高,为电磁带隙结构在空间遥感相机电路等其他工程上的应用提供了实验参考。Considering the development trends of space remote sensing camera and integrated circuit, the noise suppression in PCBs becomes a topical research theme. According to the traditional decoupling capacitor method and the Electromagnetic Band-Gap（EBG） principles applied to circuit noise suppression, a novel EBG structure is proposed in this paper. With simulations of the EBG structure, the testing results show that the structure can restrain circuit noise obviously. Therefore, a prototype PCB was manufactured with design of the EBG structure, with which the measurement was implemented. And the RMS of the circuit noise has a reduction of 27.96%. By analyzing the contrast data, the validity of the noise suppression using this EBG structure is proved. Furthermore, based on an applied PCB in CCD camera imaging circuits, the PCB with EBG structure has better performance by comparison with the image SNR DATA, thereby the EBG structure can be applied in such engineering as space remote sensing camera integrated circuit.

关 键 词：混合信号 高速电路 电路板 电磁带隙 噪声 空间遥感相机 

分 类 号：TN402[电子电信—微电子学与固体电子学]