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Numerically efficient algorithm for compact microwave device optimization with flexible sensitivity updating scheme

Abstrakt

An efficient trust-region algorithm with flexible sensitivity updating management scheme for electromagnetic (EM)-driven design optimization of compact microwave components is proposed. During the optimization process, updating of selected columns of the circuit response Jacobian is performed using a rank-one Broyden formula (BF) replacing finite differentiation (FD). The FD update is omitted for directions sufficiently well aligned with the recent design relocation. As the algorithm converges, the alignment threshold is gradually reduced so that the condition for using BF becomes less stringent. This allows for further reduction of the number of EM simulations involved in the optimization process. The presented flexible Jacobian update scheme allows for considerable reduction of the computational cost with only slight degradation of the design quality. Robustness of the presented algorithm is validated through multiple optimization runs from random initial designs. The verification experiments are conducted for a range of microwave components, including a compact microstrip coupler as well as a threesection compact microwave resonant cell-based impedance transformer. The effects of the alignment threshold value on the computational efficiency of the algorithm and the design quality are investigated. Significant savings reaching 50% as compared to the reference algorithm are demonstrated.

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Copyright (2019 Wiley Periodicals, Inc.)

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Kategoria:
Publikacja w czasopiśmie
Typ:
artykuły w czasopismach
Opublikowano w:
INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING nr 29, strony 1 - 7,
ISSN: 1096-4290
Język:
angielski
Rok wydania:
2019
Opis bibliograficzny:
Pietrenko-Dąbrowska A., Kozieł S.: Numerically efficient algorithm for compact microwave device optimization with flexible sensitivity updating scheme// INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING -Vol. 29,iss. 7 (2019), s.1-7
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1002/mmce.21714
Bibliografia: test
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Weryfikacja:
Politechnika Gdańska

wyświetlono 63 razy

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