Full-Wave Electromagnetic Optimisation of Corrugated Metallic Reectors Using a Multigrid Approach

Download

index.pdf

Date

2018-01-19

Author

KARAOVA, Gokhan
ALTINOKLU, Askin
Ergül, Özgür Salih

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

210
views

96
downloads

A multigrid optimisation strategy is introduced to design passive metallic reflectors with corrugated shapes. The strategy is based on using genetic algorithms at multiple grids and shaping the metal sheets, starting from coarse details to fine tunings. This corresponds to a systematic expansion of the related optimisation space, which is explored more efficiently in comparison to a brute-force optimisation without using grid. By employing the multilevel fast multipole algorithm to analyse the electromagnetic problems corresponding to optimisation trials, we obtain accurately designed reflectors that provide focussing abilities with very high performances at single and multiple locations. The designed reflectors are also resistant to fabrication errors with less complex corrugations and simplified reflection mechanisms compared to those found by no-grid optimisation trials.

Subject Keywords

TOPOLOGY OPTIMIZATION, GENETIC OPTIMIZATION, SCATTERING, FREQUENCY, DESIGN, ALGORITHM, EFFICIENT, SURFACES

URI

https://hdl.handle.net/11511/41359

Journal

SCIENTIFIC REPORTS

DOI

https://doi.org/10.1038/s41598-017-18174-4

Collections

Department of Electrical and Electronics Engineering, Article

Suggestions

OpenMETU
Core

Design and Simulation of Passive Reflecting Surfaces for 5G Applications Karaova, Gokhan; Ergül, Özgür Salih (2021-01-01) Design and simulation of passive reflectors to be used in 5G applications are presented. An optimization environment is constructed based on genetic algorithms (GAs) and a full-wave solver to obtain compact reflectors that possess various reflection characteristics in accordance with given design specifications. In addition to their triangulated models for simulations, reflectors are represented by Bezier surfaces on the optimization side to reach smooth designs that are suitable for fabrication. A multigri...
A parallel aerostructural shape optimization platform for airplane wings Oktay, Erdal; Arpacı, Anıl; Şehitoğlu, Onur Tolga; Akay, Hasan Umur (null; 2019-05-17) A parallel design platform is developed for aerostructural shape optimization of airplane wings. The developed tools consist of a panel method-based aerodynamic solver, a finite element-based structural solver, geometry and mesh generation modules and a parallel genetic algorithm optimizer, with emphasis given to automation and fast solutions
Multistage launch vehicle design with thrust profile and trajectory optimization / Civek Coşkun, Ezgi; Özgören, Mustafa Kemal; Department of Mechanical Engineering (2014) In the frame of this thesis, a Matlab® based design tool utilizing a general purpose optimal control solver GPOPS-II® was developed for the optimization of ascent trajectories of multistage launch vehicles. This tool can be utilized both for preliminary mission design of an existing launch vehicle and conceptual design of a new launch vehicle. In the preliminary mission design of an existing launch vehicle, maximizing payload mass is a very common performance measure. Therefore, a trajectory optimization co...
Design, fabrication, and measurement of efficient beam-shaping reflectors for 5G mm-wave applications Karaova, Gökhan Çağlayan; Ergül, Özgür Salih; Department of Electrical and Electronics Engineering (2021-5) In this study, an optimization procedure to design corrugated passive metallic reflectors for the fifth-generation millimeter wave (5G mm-wave) applications, as well as the fabrication and measurement of the designed reflectors, are presented. Such reflecting surfaces can be used as passive repeaters in both indoor and outdoor applications to change the field coverage by redirecting incident beams into desired directions with controllable power distributions. The design procedure includes a heuristic optimi...
A hybrid trailing edge control surface concept Arslan, Pınar; Uğur, Kalkan; Harun, Tıraş; İlhan Ozan, Tunçöz; Yosheph, Yang; Gürses, Ercan; Şahin, Melin; Özgen, Serkan; Yaman, Yavuz (null; 2014-05-25) This study presents the design and analysis of a novel hybrid trailing edge control surface that is capable to perform both camber and decamber morphing. The design was conducted with CATIA V5-6R2012 package program. Structural analyses were performed with Finite Element Method by using ANSYS® Workbench™ v14.0 package program both in in-vacuo condition and under aerodynamic loading. The aerodynamic loads were calculated by Computational Fluid Dynamics analyses. The required aerodynamic mesh was generated by...

Citation Formats

G. KARAOVA, A. ALTINOKLU, and Ö. S. Ergül, “Full-Wave Electromagnetic Optimisation of Corrugated Metallic Reectors Using a Multigrid Approach,” SCIENTIFIC REPORTS, pp. 0–0, 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/41359.