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There is clear evidence that, above or within a region where wind farms are present, the normal functioning of Air Traffic Control (ATC) radars might be significantly impacted. In order to prevent these cases of impact, it is important to be able to identify the potential degradation of the service before it occurs. One of the most difficult tasks to achieve that goal is effectively characterizing...
A comprehensive characterization of the radar cross section (RCS) patterns of wind turbines is conducted, by applying Physical Optics approximation and considering specific conditions applicable to the potential impact on weather radars. Results show that monostatic RCS patterns of wind turbines present a significant main lobe generated by the mast of the turbine, perpendicular to the mast surface,...
Some important issues in the design and implementation a distributed phased array that employs wireless beamforming were presented. A two element demonstration array was built and tested to validate critical concepts, and to develop array signal processing and controller software. The critical concepts include wireless phase synchronization using a remote local oscillator (LO) beacon, and wireless...
The design, development, and testing of a digital tracking array is described. The array operates at 2.4 GHz for tracking video and data from UAVs and other mobile transmitters. A monopulse tracking technique is used to keep the beam scanned to the direction of the incoming signal. The array is built entirely of commercial off-the-shelf (COTS) components. Calibration, measurement of patterns, and...
This paper examines various aspects of distributed phased arrays that incorporate wireless beamforming. Each array element is comprised of a self-contained transmit receive module and local controller. There are no hardwired connections between the modules and the central processor. Timing and synchronization are performed wirelessly in real time, and baseband received signal data is also transferred...
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