Publication detailsArdeshir Tanha, Mandana, Brennan, Paul V., Ash, Matthew, Kohler, Anselm & McElwaine, Jim (2017). Overlapped Phased Array Antenna for Avalanche Radar. IEEE Transactions on Antennas and Propagation 65(8): 4017-4026.
- Publication type: Journal Article
- ISSN/ISBN: 0018-926X (print), 1558-2221 (electronic)
- DOI: 10.1109/TAP.2017.2712183
- Further publication details on publisher web site
- Durham Research Online (DRO) - may include full text
Author(s) from Durham
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.