Antenna Modeling Using Variable-Fidelity EM Simulations and Constrained Co-Kriging - Publication - MOST Wiedzy

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Antenna Modeling Using Variable-Fidelity EM Simulations and Constrained Co-Kriging

Abstract

Utilization of fast surrogate models has become a viable alternative to direct handling of fullwave electromagnetic (EM) simulations in EM-driven design. Their purpose is to alleviate the difficulties related to high computational cost of multiple simulations required by the common numerical procedures such as parametric optimization or uncertainty quantification. Yet, conventional data-driven (or approximation) modeling techniques are severely affected by the curse of dimensionality. This is a serious limitation when it comes to modeling of highly nonlinear antenna characteristics. In practice, general-purpose surrogates can be rendered for the structures described by a few parameters within limited ranges thereof, which is grossly insufficient from the utility point of view. This paper proposes a novel modeling approach involving variable-fidelity EM simulations incorporated into the recently reported nested kriging modeling framework. Combining the information contained in the densely sampled low- and sparsely sampled highfidelity models is realized using co-kriging. The resulting surrogate exhibits the predictive power comparable to the model constructed using exclusively high-fidelity data while offering significantly reduced setup cost. The advantages over conventional surrogates are pronounced even further. The presented modeling procedure is demonstrated using two antenna examples and further validated through the application case studies.

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Details

Category:
Articles
Type:
artykuły w czasopismach
Published in:
IEEE Access no. 8, pages 91048 - 91056,
ISSN: 2169-3536
Language:
English
Publication year:
2020
Bibliographic description:
Pietrenko-Dąbrowska A., Kozieł S.: Antenna Modeling Using Variable-Fidelity EM Simulations and Constrained Co-Kriging// IEEE Access -Vol. 8, (2020), s.91048-91056
DOI:
Digital Object Identifier (open in new tab) 10.1109/access.2020.2993951
Verified by:
Gdańsk University of Technology

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