Full-wave spectral-domain computation of material, radiation, and guided wave losses in infinite multilayered printed transmission lines

Nirod Das, David M. Pozar

Research output: Contribution to journalArticle

Abstract

A unified solution for full-wave computation of losses in a general multilayered planar transmission line is presented. It includes material losses (dielectric and conductor losses), losses due to radiation leakage, and losses caused by leakage of power to source-free characteristic modes (surface-wave or waveguide modes, for example) of the multilayered geometry. A spectral-domain moment method is used with the Galerkin testing procedure. Significant modification of the conventional spectral-domain analysis of planar transmission lines is necessary in enforcing proper boundary conditions in the Galerkin testing procedure and, more importantly, in accounting for poles and branch cuts in the complex Fourier transform domain in order to rigorously account for the different loss mechanisms discussed. Results for a few representative geometries, namely, strip and/or material loss in a microstrip line and a slotline, surface parallel plate mode leakage loss in a conductor-backed slotline and a two-layer stripline, and radiation loss in a single and a coupled stripline at the interface between two infinite mediums, are presented to demonstrate these various loss effects.

Original languageEnglish (US)
Pages (from-to)54-63
Number of pages10
JournalIEEE Transactions on Microwave Theory and Techniques
Volume39
Issue number1
DOIs
StatePublished - Jan 1991

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Guided electromagnetic wave propagation
transmission lines
Electric lines
Radiation
Geometry
Microstrip lines
Testing
radiation
Dielectric losses
Method of moments
Surface waves
Poles
Fourier transforms
Waveguides
Boundary conditions
leakage
conductors
geometry
parallel plates
dielectric loss

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

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abstract = "A unified solution for full-wave computation of losses in a general multilayered planar transmission line is presented. It includes material losses (dielectric and conductor losses), losses due to radiation leakage, and losses caused by leakage of power to source-free characteristic modes (surface-wave or waveguide modes, for example) of the multilayered geometry. A spectral-domain moment method is used with the Galerkin testing procedure. Significant modification of the conventional spectral-domain analysis of planar transmission lines is necessary in enforcing proper boundary conditions in the Galerkin testing procedure and, more importantly, in accounting for poles and branch cuts in the complex Fourier transform domain in order to rigorously account for the different loss mechanisms discussed. Results for a few representative geometries, namely, strip and/or material loss in a microstrip line and a slotline, surface parallel plate mode leakage loss in a conductor-backed slotline and a two-layer stripline, and radiation loss in a single and a coupled stripline at the interface between two infinite mediums, are presented to demonstrate these various loss effects.",
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