Effect of depletion layer on the propagation characteristics of MIS transmission lines

Author

Tony, Essam S. ; Chaudhuri, Sujeet K.

Author_Institution

Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont., Canada

Volume

47

Issue

9

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

1760

Lastpage

1763

Abstract

The effect of the depletion region that forms in a metal-insulator-semiconductor (MIS) transmission line is considered. MIS lines are normally modeled without regard to this effect. Studies conducted here show that ignoring the depletion region leads to erroneous results in estimating the propagation characteristics. For example, ignoring the effect of the depletion region leads to errors in computing the propagation constant. For the quasi-TEM mode of operation, the imaginary part of the propagation constant (attenuation constant) is off by up to 15%, and the phase constant is off by up to 3%. Moreover, for the slow-wave mode of operation, ignoring the depletion region leads to totally erroneous results, with errors of 50%-90%. Results presented here were obtained using a spatial-domain analysis utilizing the Green´s function for a generalized multilayered lossy substrate

Keywords

Green´s function methods; MIS structures; absorbing media; microstrip lines; transmission line theory; Green´s function; attenuation constant; depletion layer effect; generalized multilayered lossy substrate; metal-insulator-semiconductor transmission line; propagation characteristics; quasi-TEM mode of operation; slow-wave mode of operation; spatial-domain analysis; Attenuation; Conductivity; Dielectric losses; Dielectric substrates; Geometry; Insulation; Permittivity; Propagation constant; Transmission line discontinuities; Transmission lines;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.788509

Filename

788509