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Article Dans Une Revue International Journal of RF and Microwave Computer-Aided Engineering Année : 2011

Shape optimization of a dielectric resonator for improving its unloaded quality factor

Hassan Khalil
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Stéphane Bila
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Michel Aubourg
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Dominique Baillargeat
Serge Verdeyme
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François Jouve
Thierry Chartier

Résumé

A novel approach for shape optimization of dielectric resonators is presented with an objective of improving their unloaded quality factor. Shape (level-set) and topology (topology gradient) optimization methods coupled with finite element method are utilized together, which as a result, relaxes the traditional trade-off made between the spurious-free band (isolation) and the high unloaded quality factor of the resonators. The defined cost function is minimized by the proposed iterative coupling between the level-set method and the topology gradient method. The optimized resonator, which improves the unloaded quality factor of about 65% compared with the reference, is then approximated for fabrication. The reference, optimized, and approximated resonators are fabricated and measured. Results from the simulated and the fabricated resonators validate the optimization approach presented in this work.

Dates et versions

hal-00563289 , version 1 (04-02-2011)

Identifiants

Citer

Hassan Khalil, Stéphane Bila, Michel Aubourg, Dominique Baillargeat, Serge Verdeyme, et al.. Shape optimization of a dielectric resonator for improving its unloaded quality factor. International Journal of RF and Microwave Computer-Aided Engineering, 2011, 21, pp.120-126. ⟨10.1002/mmce.20496⟩. ⟨hal-00563289⟩
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