Determination of Resonant Modes of RF Heating Systems, Using Eigenvalue Analysis

In this paper the resonant modes of a radiofrequency industrial heating applicator system are determined numerically. This is carried out using a finite element eigenvalue calculation of the electric field of the system. Both the complex linear and nonlinearforms ofthe generalized large sparse eigen...

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Bibliographic Details
Published in:The Journal of microwave power and electromagnetic energy 2000-01, Vol.35 (1), p.3-14
Main Authors: Neophytou, R. I., Metaxas, A. C.
Format: Article
Language:English
Subjects:
eigenvalues
electrical equivalent circuit model
Electronics
Finite Element Analysis
finite elements
Hot Temperature
Industry
Models, Theoretical
radio frequency heating
Radio Waves
resonant modes
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Summary:In this paper the resonant modes of a radiofrequency industrial heating applicator system are determined numerically. This is carried out using a finite element eigenvalue calculation of the electric field of the system. Both the complex linear and nonlinearforms ofthe generalized large sparse eigenproblem are solved, the latterbeing obligatory when tnaterial properties are frequency dependent. The basis is the Implicity Restarted Arnoldi/Lanczos Methods which can be used to calculate the multiple re sonant modes occurring in the operating frequency range ofinterest. Once the resonant modes of a specific system have been obtained, an electric equivalent circuit model can be derived. The numerical results presented are compared to experimental measurements carried out on a prototype experimental system showing good agreement.
ISSN:0832-7823
DOI:10.1080/08327823.2000.11688414