The effects of finite metallisation thickness and conductivity in microstrip lines
ISSN: 0332-1649
Article publication date: 1 March 2013
Abstract
Purpose
The purpose of this paper is to study and discuss the effects of the finite metallisation thickness and conductivity on the properties of microstrip lines.
Design/methodology/approach
Effective dielectric constant and attenuation constant of microstrip lines with finite metallization thickness and finite conductivity are analyzed by the method of lines. The experimental results are obtained by using Vector Network Analyzer and the 3680 V Universal Test Fixture of Anritsu.
Findings
The strip thickness has a great impact on the attenuation constant of the microstrip lines. The effects can be divided into three parts by the relationship between strip thickness (t) and skindepth (δ). When t<δ, the attenuation constant will decrease rapidly as the strip thickness increase. When δ < t<2δ, the attenuation constant still decrease rapidly as the strip thickness increase, but the slope of the curve will be smaller. When 2δ < t, the effects of the strip thickness will become insignificant and the attenuation constant still decrease slowly as the strip thickness increase.
Originality/value
This paper presents some useful principles about the effects of the finite metallization thickness and finite conductivity in microstrip lines. The reasons for these effects are discussed by analyzing the longitudinal electric field distribution in the strip. Finally, some experimental results are given to verify these principles.
Keywords
Citation
Gao, B., Tong, L. and Gong, X. (2013), "The effects of finite metallisation thickness and conductivity in microstrip lines", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 32 No. 2, pp. 495-503. https://doi.org/10.1108/03321641311296891
Publisher
:Emerald Group Publishing Limited
Copyright © 2013, Emerald Group Publishing Limited