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Topology optimization of UWB monopole antennas
Umeå University, Faculty of Science and Technology, Department of Computing Science.ORCID iD: 0000-0002-1318-7519
Umeå University, Faculty of Science and Technology, Department of Computing Science.
Umeå University, Faculty of Science and Technology, Department of Computing Science.ORCID iD: 0000-0003-0473-3263
2013 (English)In: 7th European Conference on Antennas and Propagation (EuCAP2013), New York: IEEE conference proceedings, 2013, 1488-1492 p.Conference paper, Published paper (Refereed)
Abstract [en]

A Topology optimization technique is used for complete layout optimization of the radiating element of a planar monopole antenna. The design objective is to find a conductivity distribution that maximizes the energy received by the planar monopole over the frequency band 1-10 GHz. The finite difference time domain method (FDTD) is used for the numerical calculations, and an adjoint problem is derived to calculate the corresponding sensitivities. Numerical results show a promising use of topology optimization techniques for the systematic design of ultrawideband monopoles.

Place, publisher, year, edition, pages
New York: IEEE conference proceedings, 2013. 1488-1492 p.
Series
Proceedings of the European Conference on Antennas and Propagation, ISSN 2164-3342
Keyword [en]
adjoint equations, FDTD, Maxwell equations, topology optimization, ultrawideband (UWB)
National Category
Computer Science
Identifiers
URN: urn:nbn:se:umu:diva-79479ISI: 000327126001092ISBN: 978-889070183-2 ISBN: 978-1-4673-2187-7 (print)OAI: oai:DiVA.org:umu-79479DiVA: diva2:642023
Conference
7th European Conference on Antennas and Propagation (EuCAP2013), Gothenburg, Sweden, 8-12 April 2013
Available from: 2013-08-20 Created: 2013-08-20 Last updated: 2017-04-11Bibliographically approved
In thesis
1. Metallic antenna design based on topology optimization techniques
Open this publication in new window or tab >>Metallic antenna design based on topology optimization techniques
2013 (English)Licentiate thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Umeå: Department of Computing Science, Umeå University, 2013. 15 p.
Series
UMINF, ISSN 0348-0542 ; 13.08
National Category
Computer and Information Science
Identifiers
urn:nbn:se:umu:diva-76691 (URN)978-91-7459-649-6 (ISBN)
Presentation
2013-05-03, Mit-huset, MC313, Umeå universitet, Umeå, 10:15
Available from: 2013-07-10 Created: 2013-07-10 Last updated: 2013-08-20Bibliographically approved
2. Topology Optimization of Antennas and Waveguide Transitions
Open this publication in new window or tab >>Topology Optimization of Antennas and Waveguide Transitions
2015 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis introduces a topology optimization approach to design, from scratch, efficient microwave devices, such as antennas and waveguide transitions. The design of these devices is formulated as a general optimization problem that aims to build the whole layout of the device in order to extremize a chosen objective function. The objective function quantifies some required performance and is evaluated using numerical solutions to the 3D~Maxwell's equations by the finite-difference time-domain (FDTD) method. The design variables are the local conductivity at each Yee~edge in a given design domain, and a gradient-based optimization method is used to solve the optimization problem. In all design problems, objective function gradients are computed based on solutions to adjoint-field problems, which are also FDTD discretization of Maxwell's equations but solved with different source excitations. For any number of design variables, the computation of the objective function gradient requires one solution to the original field problem and one solution to the associated adjoint-field problem. The optimization problem is solved iteratively using the globally convergent Method of Moving Asymptotes (GCMMA).

By the proposed approach, various design problems, including tens of thousands of design variables, are formulated and solved in a few hundred iterations. Examples of solved design problems are the design of wideband antennas, dual-band microstrip antennas, wideband directive antennas, and wideband coaxial-to-waveguide transitions. The fact that the proposed approach allows a fine-grained control over the whole layout of such devices results in novel devices with favourable performance. The optimization results are successfully verified with a commercial software package. Moreover, some devices are fabricated and their performance is successfully validated by experiments.

Place, publisher, year, edition, pages
Umeå University: Umeå University, 2015. 29 p.
Keyword
Maxwell's equations, topology optimization, antennas, waveguide transition, finite-difference time-domain, gradient-based optimization, adjoint-field problem, microwave devices.
National Category
Computer Science
Research subject
Computing Science
Identifiers
urn:nbn:se:umu:diva-102505 (URN)978-91-7601-255-0 (ISBN)
Public defence
2015-05-26, Naturvetarhuset, N450, Umeå universitet, Umeå, 10:15 (English)
Opponent
Supervisors
Available from: 2015-05-05 Created: 2015-04-27 Last updated: 2017-04-11Bibliographically approved

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fulltext(1671 kB)145 downloads
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http://www.eucap2013.org/

Authority records BETA

Hassan, EmadeldeenWadbro, EddieBerggren, Martin

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Citation style
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