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Overlapped Phased Array Antenna for Avalanche Radar

Tanha, MA; Brennan, PV; Ash, M; Kohler, A; McElwaine, J; (2017) Overlapped Phased Array Antenna for Avalanche Radar. IEEE Transactions on Antennas and Propagation , 65 (8) pp. 4017-4026. 10.1109/TAP.2017.2712183. Green open access

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Snow avalanche is a natural phenomenon, which annually causes infrastructure damage and leads to human casualties in many countries all over the world. As a result, a detailed hazard mapping is required to be able to understand the avalanche risk levels. Also, the scarcity of the areas suitable for constructing infrastructures in the mountains places a high premium on providing high precision hazard mapping. This paper presents the design and development of an advanced phased array antenna for an FMCW radar to produce a high resolution image of snow avalanche in range and cross-range. The proposed antenna is a 16-element fully populated phased array with ±14° azimuth beamwidth and ±22.5° fixed elevation angle. The designed phased array antenna has 14.4 dBi gain and -20.3 dB sidelobe level. In this design, subarraying overlapping technique has been used to eliminate undesirable grating lobes by means of spatial antialias filtering. A phased array power divider is proposed to allow tapering of the amplitude of the elements to achieve low sidelobe level.

Type: Article
Title: Overlapped Phased Array Antenna for Avalanche Radar
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/TAP.2017.2712183
Publisher version: http://doi.org/10.1109/TAP.2017.2712183
Language: English
Additional information: © 2017 IEEE. This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Science & Technology, Technology, Engineering, Electrical & Electronic, Telecommunications, Engineering, Amplitude tapering, grating lobes, overlapping subarray, phased array, power dividers, MICROSTRIP PATCH ANTENNA, GRATING LOBES, BANDWIDTH, SUBARRAYS, PROFILE, DESIGN, SLOT
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1559300
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