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The design and implementation of a continuously steerable antenna array for Synthetic Aperture Radar applications in the S-band is presented. The system consists of a 4-element Vivaldi antenna array, a 4×4 Butler matrix and four varactor-based phase shifters to achieve continuous beam steering. The stacked antipodal Vivaldi antenna array showed 11dB gain with 30° beamwidth within 2ߝ4GHz. The combination...
Since the development of gliders, scientists have used them to collect high resolution data sets over long periods of time, weeks to months. For the majority of the time a glider is flown, scientists equip the glider with only the sensors needed to collect a limited data set specific to the scientist's research objective. Scientists can overload the glider with sensors, causing a shortening of the...
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