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On EM-driven size reduction of antenna structures with explicit constraint handling

Abstract

Simulation-driven miniaturization of antenna components is a challenging task mainly due to the presence of expensive constraints, evaluation of which involves full-wave electromagnetic (EM) analysis. The recommended approach is implicit constraint handling using penalty functions, which, however, requires a meticulous selection of penalty coefficients, instrumental in ensuring optimization process reliability. This paper proposes a novel size reduction technique with explicit handling of design constraints. Our approach employs trust-region gradient-based procedure as an underlying optimization engine, and adjusts the search radius based on assessing the quality of representing constraints by auxiliary linear expansion models (versus their exact evaluation through EM analysis), rather than based on the quality of objective rendition. This unconventional utilization of trust region framework leads to a procedure that is demonstrably superior over implicit methods, as indicated by comprehensive numerical studies involving four broadband antennas, and benchmarking against state-of-the-art techniques. The two most attractive features of our methodology are simplicity, and no need to tune the algorithm for a specific problem at hand.

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Accepted or Published Version
DOI:
Digital Object Identifier (open in new tab) 10.1109/ACCESS.2021.3134314
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Creative Commons: CC-BY open in new tab

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Details

Category:
Articles
Type:
artykuły w czasopismach
Published in:
IEEE Access no. 6, pages 1 - 7,
ISSN: 2169-3536
Language:
English
Publication year:
2021
Bibliographic description:
Kozieł S., Kozieł S.: On EM-driven size reduction of antenna structures with explicit constraint handling// IEEE Access -Vol. 6, (2021), s.1-7
DOI:
Digital Object Identifier (open in new tab) 10.1109/access.2021.3134314
Sources of funding:
  • IDUB
Verified by:
Gdańsk University of Technology

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