Quasi-TEM analysis of coplanar waveguides with an inhomogeneous semiconductor substrate
Journal
IEEE Transactions on Microwave Theory and Techniques
Journal Volume
44
Journal Issue
9
Pages
1586-1589
Date Issued
1996-09
Author(s)
Abstract
In this paper, we study the normalized wavelength and attenuation constant of coplanar waveguides with a finite metal thickness. The substrate is a lossy inhomogeneous insulator-semiconductor, and the conductor is assumed perfect. Electroquasi-static approximation is used to derive a Laplace's equation with a complex permittivity in each inhomogeneous layer, from which the eigenmodes are obtained. Proper boundary conditions between contiguous layers are applied to calculate the charge distribution on the center conductor. The effects of the insulator depth and semiconductor conductivity on the normalized wavelength and attenuation constant are analyzed.
Type
journal article