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Analysis of a folded reflect-array antenna using particle swarm optimization

Published online by Cambridge University Press:  19 April 2011

Sabine Dieter ,
Christoph Fischer  and
Wolfgang Menzel
Sabine Dieter*
Affiliation:
University of Ulm, Institute of Microwave Techniques, 89069 Ulm, Germany. Phone: +49 731 5026377.
Christoph Fischer
Affiliation:
University of Ulm, Institute of Microwave Techniques, 89069 Ulm, Germany. Phone: +49 731 5026377.
Wolfgang Menzel
Affiliation:
University of Ulm, Institute of Microwave Techniques, 89069 Ulm, Germany. Phone: +49 731 5026377.
*
Corresponding author: S. Dieter Email: sabine.dieter@uni-ulm.de
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Abstract

In this paper, a method for design and optimization of folded reflect-array antennas is proposed based on particleswarm optimization (PSO). In addition to such a powerful optimization algorithm, two further requirements have to be fulfilled. The first one is a good and fast algorithm for the exact prognosis of the far-field radiation diagram, resulting from a specific element configuration on the reflector. Additionally, a good choice of the fitness function for the evaluation of the resulting radiation diagrams is necessary. In both, reflect-array-related aspects such as phase truncation, reflection losses, and cell discontinuities have to be considered. Antenna optimization based on this technique is presented in this paper at the example of two 77 GHz folded reflect-array antennas. The efficiency of this approach is demonstrated with these examples, and the results are verified by measurement, showing an excellent agreement with the specifications of the diagram masks. The implemented tool, including a realistic antenna diagram preview, allows the investigation of the design parameters’ influence on the antenna performance, such as illumination amplitude, high substrate losses, and phase truncation.

Keywords

Folded reflect-array antennaPrinted reflect-arrayAntenna optimizationParticle swarm optimization (PSO)
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 3 , Special Issue 3: Special Issue on European Microwave Week 2010 , June 2011 , pp. 267 - 272
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2011

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References

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