DocumentCode :
65300
Title :
Integration of Arbitrary Lumped Multiport Circuit Networks Into the Discontinuous Galerkin Time-Domain Analysis
Author :
Ping Li ; Li Jun Jiang
Author_Institution :
Dept. of Electr. & Electron. Eng., Univ. of Hong Kong, Hong Kong, China
Volume :
61
Issue :
7
fYear :
2013
fDate :
Jul-13
Firstpage :
2525
Lastpage :
2534
Abstract :
A hybrid electromagnetic (EM) circuit simulator is proposed for incorporating multiport lumped circuit networks through their admittance matrices into the discontinuous Galerkin time-domain (DGTD) method. The admittance matrix in the Laplace domain can be derived analytically or obtained from network parameters such as S-parameters in the frequency domain. To convert frequency-dependent S-parameters into the admittance matrix in the Laplace domain, the vector-fitting technique is employed to facilitate the mapping process. The computational domain of interest is split into two subdomains. One is the EM part solved by the DGTD, and another is the circuit part modeled by the basic I-V relationships in the time domain. The couplings between the EM and circuit parts happen at lumped ports where the port voltages and currents are solved via these coupled systems. Due to the local properties of DGTD operations, only small coupling matrix equation systems are involved. To further improve the efficiency, local time-stepping strategy is included. To show the validity of the proposed simulator, several numerical examples are presented and compared with results from other references.
Keywords :
Galerkin method; S-parameters; matrix algebra; multiport networks; time-domain analysis; DGTD method; Laplace domain; admittance matrices; arbitrary lumped multiport circuit networks; computational domain; coupling matrix equation systems; discontinuous Galerkin time-domain analysis; frequency domain; frequency-dependent S-parameters; hybrid EM circuit simulator; hybrid electromagnetic circuit simulator; local time-stepping strategy; lumped ports; mapping process; network parameters; port currents; port voltages; vector-fitting technique; Circuit network parameters; discontinuous Galerkin time-domain (DGTD) method; fast-relaxation vector-fitting (FRVF) method; local time-stepping (LTS) method; multiport lumped-circuit networks; transient analysis;
fLanguage :
English
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9480
Type :
jour
DOI :
10.1109/TMTT.2013.2261085
Filename :
6516996
Link To Document :
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