Investigation of the longitudinal multiconductor transmission line functions for symmetric coupled-microstrip systems

Author

Nickel, Josh G. ; Schutt-Ainé, José E.

Author_Institution

Dept. of Electr. & Comput. Eng., Illinois Univ., Urbana, IL, USA

Volume

50

Issue

1

fYear

2002

fDate

1/1/2002 12:00:00 AM

Firstpage

183

Lastpage

190

Abstract

In inhomogeneous multiconductor transmission line (MTL) structures such as coupled microstrip, propagation is characterized by multiple quasi-TEM modes with distinct propagation constants. These "mode delays" cause the MTL functions to exhibit longitudinal behavior that superficially appears problematic in the context of passive lossless reciprocal systems. This paper presents a thorough investigation of the longitudinal MTL functions. Using MTL formulation and computer simulation, we explain the mathematics and physics of mode delays so that their effects are not misinterpreted or attributed to error in the numerical analysis of MTLs

Keywords

coupled transmission lines; delays; electric admittance; electric immittance; matrix algebra; microstrip lines; multiconductor transmission lines; transmission line theory; computer simulation; immittance matrices; inhomogeneous transmission line structures; longitudinal MTL functions; longitudinal multiconductor transmission line functions; modal dispersion; mode delays; multiple quasi-TEM modes; passive lossless reciprocal systems; propagation constants; symmetric coupled-microstrip systems; Computer errors; Computer simulation; Couplings; Delay effects; Mathematics; Microstrip; Multiconductor transmission lines; Numerical analysis; Physics; Propagation constant;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.981264

Filename

981264