Journal
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
Volume 19, Issue 7, Pages 1197-1200Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LAWP.2020.2995079
Keywords
Antenna arrays; Radar antennas; Antenna measurements; Ice; Radar; Antenna radiation patterns; Mills cross array; ultrawideband (UWB) monopole; UHF radar
Funding
- Villum Investigator Project IceFlow [16572]
- East Greenland Ice-Core Project
- Denmark (A. P. Moller Foundation)
- Denmark (University of Copenhagen)
- USA (National Science Foundation, Office of Polar Programs)
- Germany (AlfredWegener Institute)
- Japan (National Institute of Polar Research and Artic Challenge for Sustainability)
- Norway (University of Bergen)
- Norway (Bergen Research Foundation)
- Switzerland (Swiss National Science Foundation)
- France (French Polar Institute Paul-Emile Victor)
- France (Institute for Geosciences and Environmental Research)
- China (Chinese Academy of Sciences)
- China (Beijing Normal University)
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An electrically large ultrawideband ultrahigh frequency (UHF) monopole antenna array has been designed to sound up to 3 km of ice and meet the logistical requirements of transportation to arctic regions. The monopole array is comprised of 16 planar subarray modules, which in combination form a 16 m by 17 m Mills cross array configuration to maximize sensitivity and spatial selectivity in both cross-track and along-track directions. Each planar subarray module is 1 m by 2 m in size with a 6.35 cm thick rigid insulation foam panel separating the individual monopole elements from metal foil ground plane on the top such that the maximum radiation is directed to nadir. Each subarray panel consists of 4 by 8 circular monopole antenna elements with a spacing of 0.25 m. Each monopole element is printed on a 130 mm by 80 mm 62 mil FR4 board. The total weight of each subarray panel is 9 kg, making for very lightweight and low-profile antenna construction. The antenna array together with the radar system was deployed to the East Greenland Ice-coring Project site in August 2018 for demonstrating surface-based ice sounding at the UHF band.
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