AI 中文总结
该研究针对低太赫兹信道开展受控雾测量，得出与液态水含量相关的雾衰减及频率缩放规律，为低太赫兹雾链路预算提供参考数据与缩放定律。
AI 中文摘要
雾会降低太赫兹（THz）无线系统的链路余量，早期信道测量主要依赖能见度，几乎没有报告过与液态水含量（LWC）相关的衰减系数。本论文在低太赫兹频率（120、140和160 GHz）下，于22米信道上开展受控雾测量，从时间对齐的水滴尺寸分布（DSD）中提取LWC，并将其与雾诱发衰减配对，得到各频率下衰减与LWC的关系。将结果与ITU-R P.840的对比作为变量误差问题处理，分离出绝对系数及其频率依赖性（系数随频率的增长方式），以频率的幂律表示，实测指数为1.347，与20℃下ITU-R P.840隐含的1.343值匹配。研究结果为低太赫兹频率下的雾链路预算提供了参考数据和简洁的缩放规律。
英文摘要
Fog can reduce the link margin of terahertz (THz) wireless systems. Earlier channel measurements mainly relied on visibility, and almost no liquid water content (LWC) referenced attenuation coefficients have been reported. This letter reports controlled fog measurements at low-THz frequencies (120, 140, and 160 GHz) over a 22 m channel. LWC is retrieved from a time-aligned droplet size distribution (DSD) and paired with the fog-induced attenuation to obtain the relationship between attenuation and LWC at each frequency. The comparison with ITU-R P.840 is posed as an errors-in-variables problem. This separates the absolute coefficient from its frequency dependence - how the coefficient grows with frequency. Expressed as a power law of frequency, the measured exponent is 1.347, matching the value of 1.343 implied by P.840 at 20 oC. The results provide reference data and a compact scaling law for fog link budgeting at low-THz frequencies.
CommentsSubmitted to IEEE Antennas and Wireless Propagation Letters
