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

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...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2018-04, Vol.66 (4), p.1701-1712
Main Authors: Chen, Geng, Zhao, Lei, Yu, Wenhua, Yan, Su, Zhang, Kedi, Jin, Jian-Ming
Format: Article
Language:English
Subjects:
Computer simulation
Discontinuous Galerkin time domain (DGTD)
Extrusion
Finite element method
Galerkin method
Mathematical model
Mathematical models
Microwave theory and techniques
Nonhomogeneous media
Numerical models
Parameters
Perfectly matched layers
Ports (Computers)
S-parameter extraction
Scattering parameters
Time domain analysis
total-field/scattered-field (TF/SF) decomposition
waveport modeling
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Summary: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.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2017.2785800