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EM-driven topology evolution for bandwidth enhancement of hybrid quadrature patch couplers

Abstrakt

A broad operational bandwidth is one of the key performance figures of hybrid patch couplers. Due to the lack of systematic design procedures, bandwidth enhancement is normally obtained through manual modifications of the structure geometry. In this work, an optimization-based topology evolution for EM-driven design of patch couplers with enhanced bandwidth has been proposed. The method exploits a novel spline-based EM model where the spline control points (also referred to as knots) are defined in a cylindrical coordinate system. The model has been optimized in an unattended manner using a gradient-based algorithm embedded in a trust-region framework. Two design cases with 13 and 21 design parameters have been considered. The optimized structures are characterized by symmetrical bandwidth (defined for the maximum of 0.5 dB imbalance between S21 and S31) of 23.4% and 31.6%, respectively. The obtained coupler topologies have been favorably compared with state-of-the-art patch broadband couplers reported in the literature.

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Wersja publikacji
Accepted albo Published Version
Licencja
Copyright (2018 Warsaw Univ. of Technology, IEEE)

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Informacje szczegółowe

Kategoria:
Aktywność konferencyjna
Typ:
publikacja w wydawnictwie zbiorowym recenzowanym (także w materiałach konferencyjnych)
Tytuł wydania:
2018 22nd International Microwave and Radar Conference (MIKON) strony 175 - 178
Język:
angielski
Rok wydania:
2018
Opis bibliograficzny:
Bekasiewicz A., Kozieł S.: EM-driven topology evolution for bandwidth enhancement of hybrid quadrature patch couplers// 2018 22nd International Microwave and Radar Conference (MIKON)/ : , 2018, s.175-178
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.23919/mikon.2018.8405169
Bibliografia: test
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  5. S.Y. Zheng, S.H. Yeung, W.S. Chan, K.F. Man, and S.H. Leung, "Size- reduced rectangular patch hybrid coupler using patterned ground plane," IEEE Trans. Microwave Theory Tech., vol. 57, no. 1, pp. 180-188, 2009.
  6. S. Sun and L. Zhu, "Miniaturised patch hybrid couplers using asymmetrically loaded cross slots," IET Microwaves, Ant. Prop., vol. 4, no. 9, pp. 1427-1433, 2010. otwiera się w nowej karcie
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  9. M. Ghassemi, M. Bakr, and N. Sangary, "Antenna design exploiting adjoint sensitivity-based geometry evolution," IET Microwaves, Ant. Prop., vol. 7, no. 4, pp. 268-276, 2013. otwiera się w nowej karcie
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  11. CST Microwave Studio, ver. 2013, Dassault Systems, 10 rue Marcel Dassault, CS 40501, Vélizy-Villacoublay Cedex, France, 2013.
  12. S. Koziel and A. Bekasiewicz, "Expedited simulation-driven design optimization of UWB antennas by means of response features," Int. J. RF Microwave CAE, vol. 27, no. 6, pp. 1-8, 2017. otwiera się w nowej karcie
  13. A.R. Conn, N.I.M. Gould, and P.L. Toint, Trust Region Methods, MPS- SIAM Series on Optimization, 2000. otwiera się w nowej karcie
  14. A. Akdagli, "A novel expression for effective radius in calculating the resonant frequency of circular microstrip patch antennas," Microwave, Opt. Technol. Lett., vol. 49, no. 10, pp. 2395-2398, 2007. otwiera się w nowej karcie
Weryfikacja:
Politechnika Gdańska

wyświetlono 84 razy

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