Experimental comparison of terahertz and infrared data signal attenuation in dust clouds.
Experimental comparison of terahertz and infrared data signal attenuation in dust clouds.
复制标题
尘云中太赫兹和红外数据信号衰减的实验比较。
DOI：
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发表时间：
2012
影响因子：
1.9
通讯作者：
J. Federici
中科院分区：
文献类型：
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作者：
Ke Su;L. Moeller;R. Barat;J. Federici
为了研究和比较太赫兹（THz）链路与红外（IR）链路在湍流、雾和尘埃颗粒等不同天气条件下的传播特性，研制了载波频率为625 GHz、波长为1.5 μm、最大数据速率为2.5 Gb/s的太赫兹（THz）和红外（IR）自由空间通信链路。在传播通过相同的信道扰动所造成的灰尘，衰减的载波频率的灰尘以及闪烁效应对两个通道进行了分析，通过测量的功率衰减和误码率。由于灰尘的存在而引起的衰减使IR通道劣化，但对THz信号几乎没有可测量的影响。数值模拟了太赫兹波在不同粉尘浓度下的衰减情况，并与实测结果进行了比较。
In order to study and compare propagation features of terahertz (THz) links with infrared (IR) links under different weather conditions such as turbulence, fog, and dust particles, THz and IR free space communication links at 625 GHz carrier frequency and 1.5 μm wavelength, respectively, with a maximum data rate of 2.5 Gb/s have been developed. After propagating through the same channel perturbation caused by dust, attenuation of the carrier frequencies by dust as well as scintillation effects on both channels are analyzed by measuring the power attenuation and bit error rates. Attenuation by the presence of dust degrades the IR channel but exhibits almost no measurable impact on the THz signal. Numerical simulations of THz attenuation with different dust concentrations are presented and agree with the measured results.