Dual-band System composed by a Photonics-based Radar and a Focal-Point/Cassegrain Parabolic Antenna

T. H. Brandão, H. R. D. Filgueiras, A. A. C. Alves, F. Scotti, S. Melo, A. Bogoni, A. C. Sodré Jr.

Abstract


This work reports a dual-band radar system composed of aphotonics-based transceiver and a unique dual-band antenna. The proposed antenna consists of an integration of conventional focal-point and Cassegrain parabolic antennas in the same structure, ensured by using a subreflector based on a frequency selective surface. Numerical and experimental results in terms of the antenna reflection coefficient, radiation pattern and gain are reported with excellent agreement over both frequency ranges. The innovative dual-band photonics-based radar transceiver operates simultaneously in the S- and X-bands. The radar system has been properlyvalidated by multiple detections of helicopters and airplanes in real conditions.


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DOI: http://dx.doi.org/10.1590/2179-10742018v17i41545

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