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Using the LU Recombination Method to Extend the Application of Circuit-Oriented Finite Element Methods to Arbitrarily Low Frequencies.
- Source :
- IEEE Transactions on Microwave Theory & Techniques; May2010 Part 1, Vol. 58 Issue 5, p1189-1195, 7p
- Publication Year :
- 2010
-
Abstract
- The circuit-oriented finite-element method (FEM) is a method that combines a finite-element field solver with a circuit analyzer and is suitable for analyzing electromagnetic field/circuit coupled problems. This paper describes a significant improvement to existing circuit-oriented FEMs that reduces the number of circuit elements and eliminates low-frequency stability problems. A modified LU recombination method is used to reformulate the original field-solver matrix equations. Circuits based on the reformulated equations are relatively insensitive to numerical errors and do not contain the small-value series resistors that circuit solvers are normally forced to add in order to guarantee a stable solution. Using this approach, the circuit-oriented FEM is capable of time- and/or frequency-domain simulations of problems containing linear or nonlinear lumped elements over a wide bandwidth. Examples are provided that demonstrate the ability of the new technique to model geometries from dc to several gigahertz in a single simulation. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00189480
- Volume :
- 58
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Microwave Theory & Techniques
- Publication Type :
- Academic Journal
- Accession number :
- 51119300
- Full Text :
- https://doi.org/10.1109/TMTT.2010.2045533