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Fractal antenna arrays for MIMO radar applications

Published online by Cambridge University Press:  26 October 2017

Christoph Dahl Open the ORCID record for Christoph Dahl [Opens in a new window] ,
Michael Vogt  and
Ilona Rolfes
Christoph Dahl*
Affiliation:
Institute of Microwave Systems, Ruhr-University Bochum, Universitaetsstr. 150, 44801 Bochum, Germany
Michael Vogt
Affiliation:
Institute of Electronic Circuits, Ruhr-University Bochum, Universitaetsstr. 150, 44801 Bochum, Germany
Ilona Rolfes
Affiliation:
Institute of Microwave Systems, Ruhr-University Bochum, Universitaetsstr. 150, 44801 Bochum, Germany
*
Corresponding author: C. Dahl Email: christoph.dahl@rub.de
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Abstract

In this contribution, fractal antenna arrays are analyzed for their applicability in multiple-input multiple-output (MIMO) radars. Array geometries based on the Fudgeflake fractal and the Gosper island fractal are investigated. In addition, a concept for the combination of both fractals is shown in order to increase the flexibility concerning the number of transmitting and receiving antennas. The presented fractal MIMO concepts can be utilized in order to improve the angular resolution and to reduce the sidelobe level for a given number of transmitting and receiving antennas. It is shown that a fractal MIMO concept with 21 transmitting antennas and 21 receiving antennas improves the angular resolution to 4.6 degrees and reduces side lobe level by 3.1 dB compared to a MIMO configuration based on two linear arrays with the same number of antenna elements. In addition, the results are experimentally validated by broadband radar measurements.

Keywords

Radar applicationsRadar architecture and aystems
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 9 , Issue 10 , December 2017 , pp. 2019 - 2028
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2017 

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References

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