This paper presents the design and analysis of a 5.3 GHz phased array antenna for radar geophysical imaging of snow avalanches. The antenna is designed by utilizing overlapping subarrays to operate over a ±15 • field of view while having a pattern which suppresses the grating lobes. The presented results indicate that the desired beamwidth and radiation pattern are achieved while an ample bandwidth of 390 MHz and a gain of 14.5 dBi are reached.
In this reply, we refer to comments made by a reader on our publication "Overlapped Phased Array Antenna for Avalanche Radar". Authors would like to thank the reader for reading the paper. In this paper authors provided detailed answers to the comments made by the reader.
Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Abstract-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 14.4dBi gain and -20.3dB sidelobe level. In this design Subarraying overlapping technique has been used to eliminate undesirable grating lobes by means of spatial anti-alias filtering. A phased array power divider is proposed to allow tapering of the amplitude of the elements to achieve low sidelobe level.
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