一种按照指数函数相对振幅分布的新型周期DGS微带线设计

设计了一种新型一维周期接地缺陷结构(DGS)微带线。与传统的周期均匀DGS单元微带线不同的是,这种改进的周期DGS平面电路是一种补偿的微带线,每个DGS单元尺寸是不同的,尺寸按照指数函数e1/n(n为正整数)的相对振幅变化。本文设计了一个均匀周期DGS平面电路和两个改进的周期DGS平面电路,测量结果显示改进的周期DGS平面电路能够更好地抑制波纹和增大带阻带宽。

A Design of Novel Periodic DGS Varied to the Relative Amplitudes Distribution of the Exponential Function for Microstrip Line

A novel one-dimensional(1-D) periodic defected ground structure(DGS) for microstrip line is presented in this letter.Different from the traditional periodic DGS with uniform DGS units,the improved periodic DGS planar circuit has a compensated microstrip line and the dimensions of each DGS size is different and varied proportionally to the relative amplitude distribution of the exponential function(n denotes the positive integer).A uniform periodic DGS planar circuit and two improved DGS planar circuits are designed.Measurements show that the improved DGS planar circuit exhibits more excellent performances by suppressing ripples and enlarging stopband bandwidth.