Reduced-cost design closure of antennas by means of gradient search with restricted sensitivity update

• Autorzy: Kozieł Sławomir , Pietrenko-Dąbrowska Anna

Identyfikatory

DOI

10.24425/mms.2019.130561

• Języki publikacji: EN

Abstrakty

EN

Design closure, i.e., adjustment of geometry parameters to boost the performance, is a challenging stage of antenna design process. Given complexity of contemporary structures, reliable parameter tuning requires numerical optimization and can be executed using local algorithms. Yet, EM-driven optimization is a computationally expensive endeavour and reducing its cost is highly desirable. In this paper, a modification of the trust-region gradient search algorithm is proposed for accelerated optimization of antenna structures. The algorithm is based on sparse updates of antenna sensitivities involving various methods that include the Broyden formula used for selected parameters, as well as dimensionality- and convergence-dependent acceptance thresholds which enable additional speedup, and make the procedure easy to tune for various numbers of antenna parameters. Comprehensive verification executed for a set of benchmark antennas delivers consistent results and considerable cost reduction of up to 60 percent with respect to the reference algorithm. Experimental validation is also provided.

Słowa kluczowe

EN

antenna design; design closure; EM-driven optimization; gradient search; sensitivity update

• Wydawca: Komitet Metrologii i Aparatury Naukowej PAN
• Czasopismo: Metrology and Measurement Systems
• Rocznik: 2019
• Tom: Vol. 26, nr 4
• Strony: 595--605
• Opis fizyczny: Bibliogr. 29 poz., rys., tab., wzory

Twórcy

autor

Kozieł Sławomir

• Reykjavik University, Engineering Optimization and Modeling Center, Menntavegur 1, 101 Reykjavik, Iceland
• Gdańsk University of Technology, Faculty of Electronics, Telecommunications and Informatics, G. Narutowicza 11/12, 80-233 Gdańsk, Poland

autor

Pietrenko-Dąbrowska Anna

• Gdańsk University of Technology, Faculty of Electronics, Telecommunications and Informatics, G. Narutowicza 11/12, 80-233 Gdańsk, Poland

Bibliografia

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Uwagi

EN

This work was supported in part by the Icelandic Centre for Research (RANNIS) Grant 174114051 and 174573052, and by the National Science Centre of Poland Grant 2015/17/B/ST6/01857. The authors would like to thank Dassault Systemes, France, for making CST Microwave Studio available.