A General Scheme for the Discontinuous Galerkin Time-Domain Modeling and S-Parameter Extraction of Inhomogeneous Waveports

Geng Chen, Lei Zhao, Wenhua Yu, Su Yan, Kedi Zhang, Jian Ming Jin

Research output: Contribution to journalArticle

Abstract

A general numerical scheme is proposed for the waveport modeling and scattering-parameter (S-parameter) extraction of inhomogeneous waveports with the discontinuous Galerkin time-domain method. In this scheme, the waveports are truncated with perfectly matched layers with a hybrid mesh automatically extruded from the mesh of the physical device to be simulated. The waveports are then excited by a total-field/scattered-field technique, with which the incident and scattered waves can be obtained for an accurate calculation of the S-parameters. A novel eigenmode solver is also developed to calculate the required modal profiles for the eigenmodes in both homogeneous and inhomogeneous waveports. Special attention is paid to the S-parameter extraction for evanescent modes, which has been a difficult task for time-domain simulations. Numerical examples are given to validate the proposed numerical scheme.

Original languageEnglish (US)
Pages (from-to)1701-1712
Number of pages12
JournalIEEE Transactions on Microwave Theory and Techniques
Volume66
Issue number4
DOIs
StatePublished - Apr 2018

Keywords

  • Discontinuous Galerkin time domain (DGTD)
  • S-parameter extraction
  • total-field/scattered-field (TF/SF) decomposition
  • waveport modeling

ASJC Scopus subject areas

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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