Comparison of the influence of Martian and Earth's atmospheric environments on terahertz band electromagnetic waves,International Journal of Communication Systems

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Comparison of the influence of Martian and Earth's atmospheric environments on terahertz band electromagnetic waves
International Journal of Communication Systems ( IF 1.7 ) Pub Date : 2021-06-14 , DOI: 10.1002/dac.4894
Zhuo Diao ₁ , Qingfeng Jing ₁ , Weizhi Zhong ₁

Affiliation

Terahertz waves have wide application prospects in space communication because of their strong penetration ability, wide band, and strong directional antenna. Therefore, it is necessary to study the propagation characteristics of terahertz waves in space, such as in the environment on Mars. In space near Mars, the terahertz link is mainly affected by the absorption attenuation of its atmosphere and the scatter attenuation of heavy dust storms. In this paper, the absorption of 0.1–1 THz waves in the Martian atmosphere is analyzed. The absorption coefficient is calculated based on the theory of atmospheric radiative transfer and the HITRAN database. The influence of temperature, pressure, and altitude on the absorption coefficient is analyzed, and the calculation results are compared with those of Earth's atmosphere. The size distribution of Martian dust particles is then fitted by lognormal distribution, and the transmission characteristics of terahertz waves with different wavelengths are studied based on Mie theory. The research results show the transparent window positions of the attenuation peaks of water vapor and oxygen, which are the main factors of atmospheric transmission attenuation in the 0.1–1 THz band. The attenuation of Martian dust is affected by the size parameter, and it decreases with the visibility of the dust storm. The results provide a reference for terahertz communications in a Martian atmospheric environment and clarify the range of Martian atmospheric fading and dust fading.

中文翻译：

火星与地球大气环境对太赫兹波段电磁波影响的比较

太赫兹波具有穿透能力强、频带宽、天线定向性强等特点，在空间通信中具有广阔的应用前景。因此，有必要研究太赫兹波在太空中的传播特性，例如在火星环境中。在火星附近空间，太赫兹链路主要受其大气吸收衰减和强沙尘暴散射衰减的影响。在本文中，分析了火星大气中 0.1-1 THz 波的吸收。吸收系数是根据大气辐射传输理论和HITRAN数据库计算得出的。分析了温度、压力和高度对吸收系数的影响，并将计算结果与地球大气的计算结果进行了比较。然后通过对数正态分布拟合火星尘埃粒子的粒径分布，并基于米氏理论研究了不同波长太赫兹波的传输特性。研究结果表明，水汽和氧气衰减峰的透明窗口位置是0.1-1 THz频段大气传输衰减的主要因素。火星沙尘的衰减受大小参数的影响，随着沙尘暴能见度的增加而减小。研究结果为火星大气环境中的太赫兹通信提供了参考，明确了火星大气衰落和尘埃衰落的范围。并基于米氏理论研究了不同波长的太赫兹波的传输特性。研究结果表明，水汽和氧气衰减峰的透明窗口位置是0.1-1 THz频段大气传输衰减的主要因素。火星沙尘的衰减受大小参数的影响，随着沙尘暴能见度的增加而减小。研究结果为火星大气环境中的太赫兹通信提供了参考，明确了火星大气衰落和尘埃衰落的范围。并基于米氏理论研究了不同波长的太赫兹波的传输特性。研究结果表明，水汽和氧气衰减峰的透明窗口位置是0.1-1 THz频段大气传输衰减的主要因素。火星沙尘的衰减受大小参数的影响，随着沙尘暴能见度的增加而减小。研究结果为火星大气环境中的太赫兹通信提供了参考，明确了火星大气衰落和尘埃衰落的范围。火星沙尘的衰减受大小参数的影响，随着沙尘暴能见度的增加而减小。研究结果为火星大气环境中的太赫兹通信提供了参考，明确了火星大气衰落和尘埃衰落的范围。火星沙尘的衰减受大小参数的影响，随着沙尘暴能见度的增加而减小。研究结果为火星大气环境中的太赫兹通信提供了参考，明确了火星大气衰落和尘埃衰落的范围。

更新日期：2021-07-06

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