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A Digitally Beam-Steerable Antenna Array System for Positioning-Based Tracking Applications
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DOI：10.1109/MAP.2013.6781704.png)
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In line-of-sight airborne applications, deployment of a steerable antenna array with higher directivity and gain makes sense for reducing ground-station complexity and cost, while still maintaining a reasonable link budget. This paper reports on the design, development, and successful testing of a digitally beam-steerable phased-array antenna integrated as a complete system, comprising the antenna, hosting platform, ground station, and aircraft-based emulator to facilitate convenient aircraft-based testing of the antenna array and ground-air space communication link. Based on the measurements, the 4 x 4 element prototype tested reduced the error rate by a factor of seven in comparison with a 4 x 4 array without steering. For the same link quality, the power required was 12 dB lower than in the case of a single-element antenna. With only minor modifications, the concept can even be used in a Low Earth Orbit (LEO) satellite environment.
Keyword:
Phased array
beam steering
field programmable gate arrays
digital signal processing
channel coding
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