Shape optimized design of microwave dielectric resonators by level‐set and topology gradient methods |
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Authors: | H Khalil S Bila M Aubourg D Baillargeat S Verdeyme F Jouve C Delage T Chartier |
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Affiliation: | 1. XLIM UMR 6172, Université de Limoges/CNRS, 123 avenue Albert Thomas, 87060 Limoges, France;2. Laboratoire Jacques‐Louis Lions, UMR 7598, Université Paris Diderot, F‐75005 Paris, France;3. CTTC, Parc Ester Technopole, rue Soyouz, 87068 Limoges, France;4. SPCTS UMR 6638, Université de Limoges/CNRS, 47 à 73 avenue Albert Thomas, 87065 Limoges, France |
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Abstract: | The finite element method is coupled with the topology gradient (TG) and level‐set (LS) methods for optimizing the shape of microwave components using a computer‐aided design model. On the one hand, the LS approach is based on the classical shape derivative; while on the other hand, the TG method is precisely designed for introducing new perturbations in the optimization domain. These two approaches, which consist in minimizing a cost function related to the component behavior, are first described. Regarding given electrical specifications, these techniques are applied to optimize the distribution of ceramic parts of a dual‐mode resonator in order to improve its behavior. The optimized dielectric resonators result in a wide spurious‐free stop band. A comparison between classical and optimized dual mode resonator is presented. Theoretical results are then validated by careful measurements. © 2009 Wiley Periodicals, Inc. Int J RF and Microwave CAE 2010. |
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Keywords: | shape optimization topology gradient level‐set microwave components finite element method |
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