Experimental study on low-THz automotive radar signal attenuation during snowfall
Experimental study on low-THz automotive radar signal attenuation during snowfall
复制标题
降雪过程中低太赫兹汽车雷达信号衰减实验研究
DOI：
10.1049/iet-rsn.2018.5644
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
Norouzian F
中科院分区：
文献类型：
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作者：
Norouzian F
给出了当前汽车雷达频率(77 GHz)和低太赫兹(100-300 GHz)频率下不同降雪强度下汽车雷达信号衰减的实验测量结果，并进行了比较。衰减的特点是通过测量不同强度的雪降水和没有降水的相同路径从参考目标接收的功率的比率。给出了衰减的统计分析。更高的衰减是在更高的频率上测量的，随着降雪率和雪花中液态水含量的增加，衰减也会增加。这项研究对于研究恶劣天气条件对低太赫兹雷达性能的影响，与目前工作在传统毫米波波段的汽车雷达相比，具有重要的意义。此外，还介绍了汽车雷达天线罩上形成的典型污染物以及道路上常见目标的反射对低太赫兹波的衰减和散射的影响。
Experimental measurement results of automotive radar signal attenuation during various intensities of snowfall at the current automotive radar frequency (77 GHz) and low‐terahertz (THz) (100–300 GHz) frequencies are presented and compared in this study. The attenuation is characterised by measuring the ratio of the received power from a reference target through snow precipitation of various intensities and through the same path with no precipitation. Statistical analysis of the attenuation is presented. Higher attenuation is measured at a higher frequency, and also attenuation increases as snowfall rate and liquid water content in snowflakes increases. This study is fundamentally important to investigate the effect of adverse weather conditions on low‐THz radar performance in comparison with the current automotive radars operating in the traditional mm‐wave band. In addition, the effects of low‐THz wave attenuation and scattering due to typical contaminants formed on the radome of automotive radars and reflection from common objects on the road are presented.