Ultra-Wideband Patch Antenna Array With an Inclined Proximity Coupled Feed for Small Unmanned Aircraft RADAR Applications

This paper the design of a lightweight and compact patch antenna array with an inclined proximity coupled feed. The antenna array is designed for operation on a small unmanned aircraft system (sUAS) with an ultra-wideband (UWB) radar for remote sensing of soil moisture and snow. To achieve UWB imped...

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Bibliographic Details
Published in:IEEE Open Journal of Antennas and Propagation 2021, Vol.2, p.1079-1086
Main Authors: Awasthi, Abhishek K., Simpson, Christopher D., Kolpuke, Shriniwas, Luong, Tuan D., Yan, Jie-Bang, Taylor, Drew, Gogineni, S. Prasad
Format: Article
Language:English
Subjects:
Antenna arrays
Couplings
Feeds
Finite element analysis
inter-element coupling
L-probe feed
Patch antenna array
Patch antennas
radar
Radar antennas
Reflection coefficient
wideband
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Summary:This paper the design of a lightweight and compact patch antenna array with an inclined proximity coupled feed. The antenna array is designed for operation on a small unmanned aircraft system (sUAS) with an ultra-wideband (UWB) radar for remote sensing of soil moisture and snow. To achieve UWB impedance matching, the design utilizes an inclined wide feed and inter-element coupling. A 3-D printed base (polylactic acid) is used to support the feed structure. The antenna array operates over a 2.5 GHz - 4.5 GHz frequency (57.2% bandwidth) range, and its weight is 112 grams. A prototype 2\times4 element array is fabricated and tested. The antenna array has an 88.2% average radiation efficiency and a 13.2 dBi average realized gain over the desired frequency band with broadside and stable radiation pattern.
ISSN:2637-6431
2637-6431
DOI:10.1109/OJAP.2021.3128015