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首页> 外文期刊>Antennas and Propagation, IEEE Transactions on >Analysis and Design Optimization of Robust Aperiodic Micro-UAV Swarm-Based Antenna Arrays
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Analysis and Design Optimization of Robust Aperiodic Micro-UAV Swarm-Based Antenna Arrays

机译：鲁棒非UAV Swarm天线阵列的分析和设计优化

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摘要

Micro-UAV swarm-based antenna arrays provide a novel solution for high-risk radar imaging applications. These apertures lack a single point of failure by distributing their resources and sensors across multiple platforms. However, turbulence and positional errors provide a challenging operational environment when it comes to the implementation of these systems. Turbulence can limit the aperture's ability to coherently resolve a target and cause aircrafts to collide in midair if the formation is too tightly packed with closely spaced elements. This paper introduces several techniques that can reduce the effects of turbulence on the system. First, a phase compensation algorithm is presented that can eliminate the effects of turbulence on the main beam of the array. In addition, sparse antenna apertures can be used to create flight formations that reduce the probability of midair collisions. Traditional periodic apertures are insufficient because these arrays display grating lobes at wide interelement spacings. Therefore, two aperiodic array optimization methodologies are discussed that produce sparse array configurations suitable for micro-UAV formations. These sparse arrays exhibit low peak side-lobe levels without the presence of grating lobes over wide interelement spacings. By combining phase compensation with optimized sparse aircraft formations, one can achieve high radiation pattern resolution in a micro-UAV based radar imaging application.
机译：基于微型无人机的群体天线阵列为高风险雷达成像应用提供了一种新颖的解决方案。这些光圈通过在多个平台上分布其资源和传感器而没有单点故障。但是，在实施这些系统时，湍流和位置误差提供了具有挑战性的操作环境。如果地层太紧密地挤满了间隔很近的元素，湍流会限制光圈连贯地分辨目标的能力，并使飞机在空中相撞。本文介绍了几种可以减少湍流对系统影响的技术。首先，提出了一种相位补偿算法，该算法可以消除湍流对阵列主光束的影响。另外，稀疏的天线孔径可用于产生减少空中碰撞可能性的飞行形态。传统的周期性孔径不足，因为这些阵列在宽的元素间距处显示光栅波瓣。因此，讨论了两种非周期性阵列优化方法，这些方法可产生适用于微型无人机的稀疏阵列结构。这些稀疏阵列显示出较低的峰值旁瓣电平，而在宽的元素间距上不存在光栅瓣。通过将相位补偿与优化的稀疏飞机编队相结合，可以在基于微型无人机的雷达成像应用中实现高辐射方向图分辨率。

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