有限尺寸介质基片上的共面带线  

Coplanar Strip Line on Substrate with Finite Dimensions

作　　者：阮成礼[1] 

机构地区：[1]电子科技大学应用物理所,成都610054

出　　处：《电子科技大学学报》1999年第4期366-370,共5页Journal of University of Electronic Science and Technology of China

摘　　要：讨论了厚度和宽度都为有限尺寸的介质基片上共面带线的基本参数；有限尺寸介质基片上的共面带线是一种非常接近于工程应用状态的物理模型。用共形映射技术分析这种共面带线，得到了单位长度电容、有效介电常数和特性阻抗等基本参数；与介质基片宽度为无限大的理想化模型作了比较；给出了以无限宽介质基片共面带线作近似模型，介质基片宽度变化所产生的误差；Basic parameters of the coplanar strip line on the substrate with finite dimensions are discussed in this paper. The coplanar strip line on the substrate with finite dimensions is a physical model, which is very closed to the engineering situation. The coplanar strip lines are analyzed using conformal mapping techniques. The exact solutions including the effective dielectric constant, the capacitance per unit length and the characteristic impedance are obtained. The results obtained in this paper have been compared with that of the coplanar strip line with infinite wide substrate. The relationship between the approximation error and the width of the substrate are given when using CPS 3 as the approximation solution of CPS 4. Multi layered substrate coplanar strip line with finite dimensions is also discussed.

关 键 词：共面带线 共形映射 介质基片 传输线 

分 类 号：TN811[电子电信—信息与通信工程]