设计了一种新型一维周期缺陷接地结构（Defected Ground Structure，DGS）微带线。与周期均匀圆形缺陷的DGS不同的是，改进的周期DGS是一种补偿的微带线，圆形缺陷的尺寸是不均匀的，尺寸按照指数函数e^1/n（n为正整数）的相对振幅分布。文中设计了一个均匀周期DGS电路和两个改进的周期DGS电路，测量结果显示改进的周期DGS电路能够更好的抑制波纹和增大带阻带宽。

A new one-dimensional periodic defected ground structure(DGS) for microstrip line is presented in this paper.Different from periodic DGS with uniform circle-patterned defects,the modified periodic DGS has a compensated microstrip line and the dimensions of the circular defects are nonuniform and varies proportionally to the relative amplitude distribution of the exponential function e~(1/n)(denotes the positive integer).A uniform periodic DGS circuit and two modified periodic DGS circuits are designed.Measurements show that the latter exhibit excellent performances in terms of suppressing ripples and enlarging stopband bandwidth.

TN957.2