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Calibration of antenna arrays for aeronautical vehicles on ground

机译:地面航空飞行器天线阵列的校准

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摘要

Antenna pattern and characteristics change significantly when antenna arrays are placed on platforms like aeronautical vehicles. Calibration of antenna arrays is an important and costly process for such cases. In this paper, a method is proposed for the offline calibration of a direction finding antenna array mounted on a UH-60 helicopter. The calibration is done on an open-field test area with a flat ground plane. Ground reflections are the main sources of error corrupting the calibration data. The proposed method eliminates the ground reflections by employing a time-gating technique. Calibration data is generated by considering the platform effects. Complete calibration scenario is simulated by using numerical electromagnetic simulation tools. It is shown that the proposed approach is very effective and can be used to calibrate direction finding algorithms like the MUSIC algorithm.
机译:当天线阵列放置在航空飞行器等平台上时,天线方向图和特性会发生显着变化。对于这种情况,天线阵列的校准是重要且昂贵的过程。本文提出了一种离线校准安装在UH-60直升机上的测向天线阵列的方法。校准是在具有平坦接地平面的开阔测试区域进行的。地面反射是破坏校准数据的主要误差源。所提出的方法通过采用时间门控技术消除了地面反射。通过考虑平台效应来生成校准数据。使用数字电磁仿真工具可以仿真完整的校准方案。结果表明,所提出的方法非常有效,可用于校准测向算法,例如MUSIC算法。

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