Scattering and attenuation of electromagnetic waves by partly charged particles

Zhou, Jùn; Dou, Xuqiang; Xie, Li

doi:10.1016/j.jqsrt.2017.11.006

Cited by 23 publications

(3 citation statements)

References 19 publications

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“…C 0 sca and C 0 ext are scattering cross section and extinction cross section for an uncharged particle, respectively. The surface charge density varies from 1 to 100 mC/m 2 , which is consistent with the general level of net charges carried by particles in a sand/dust storm (Zhou et al, 2018). We also consider the extreme case that the surface charge density equals infinity, which will cause the surface conductivity to be infinite.…”

Section: Resultssupporting

confidence: 62%

Electromagnetic Response of Clustered Charged Particles

Zhou

et al. 2021

Front. Mater.

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Electromagnetic response of clustered charged particles is the foundation of electromagnetic wave interaction with various natural phenomena, such as sandstorm, cloud, and volcano eruption. Previous studies usually employed assumption of independent charged particles, without considering the coupling between them. Here, we build up a general numerical model considering the multiple scattering effect, and test it with a charged two- and four-particle system. The numerical results show that independence assumption fails, while the number density of clustered charged particles is getting larger. This work may pave the way for deeper understanding on the electromagnetic interaction of clustered charged particles.

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Section: Resultssupporting

confidence: 62%

Electromagnetic Response of Clustered Charged Particles

Zhou

et al. 2021

Front. Mater.

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“…While for a given PSD, the impact of the net surface charges on signal attenuation in moderately moist circumstances might be low or even negligible, unless there is a significant concentration of net surface charges. In another development, the authors in [58], presented the findings of systematic numerical computations used to describe a cloud of charged particles using radar backscatter data from the ground or space. They derived a mathematical expression for the scattering phase function (SPF) of a charged spherical particle [57].…”

Section: H Influence Of Charges On Sds Attenuation Modelsmentioning

confidence: 99%

Earth and Martian Sand and Dust Storms: A Comprehensive Review of Attenuation Modelling and Measurements

Noreen,

Giannetti,

Lottici

2024

IEEE Access

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Sand and dust storms (SDS) are significant atmospheric phenomena that have a negative impact on wireless links operating at various frequencies. Specifically, sand and dust (SD) particles produce attenuation in propagating electromagnetic (EM) waves upon impact, which must be measured for the proper functioning of the fade mitigation strategy. The attenuation due to SDS can be reliably evaluated using specialized equipment. However, field experiments have been conducted in only a few locations and for a limited number of link geometries; therefore, the results are not immediately generalizable to all locations. Consequently, various attenuation models based on accessible meteorological data have been developed to provide sufficient inputs for system margin calculations under all environmental conditions. In this paper, we present a comprehensive review of an extensive set of Earth SDS attenuation models that differ based on various particle characteristics in terrestrial and space communication. Furthermore, we discuss how variables such as humidity and surface charges carried by the particles are addressed in the literature. We also provide the results of various field studies conducted in many parts of the world under diverse conditions to directly measure the influence of SDS on wireless communication systems. Dust is also a significant meteorological factor in the Martian atmosphere, where it affects the efficiency of the wireless sensor networks used by NASA's Mars Exploration Project. We explore how attenuation has been extrapolated in the Martian atmosphere. Additionally, we discuss future research challenges in SDS.INDEX TERMS Attenuation, Mie Scattering, Rayleigh Model, Sand and dust storm (SDS), Satellite communication.

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“…Contact electrification is an important phenomenon in desert duststorms and other particle clouds (Pähtz et al, 2010), since the amount of charge (negative or positive) accommodated by particles can be significantly larger than previously thought (Baytekin et al, 2011). The particle surface charges integrated into electromagnetic scattering theories can potentially remediate shortcomings of present theories in explaining anomalous absorption observed occasionally at low frequencies (see e.g., Figure 8a in Zhou et al, 2018) and higher frequencies as well (see e.g., Figure 6 in Dou & Xie, 2017; or Figure 8 in Elabdin et al, 2009). The systematic modeling we have performed has also resulted in a hypothesis about the potential use of charged-particle surface excitations in controlled MW attenuation in the atmosphere.…”

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confidence: 98%

The Nature, Amplitude and Control of Microwave Attenuation in the Atmosphere

et al. 2021

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Microwave (MW) attenuation plays a critical role in constructing communication networks. It also can be a useful tool in the meteorological and optical communities for radar and microwave imaging applications. Because most atmospheric constituents (large hydrometeors being an exception) are very small compared to MW wavelengths, data analysis is typically performed using conventional Rayleigh theory; however, some anomalous observations have proven difficult to explain. We present the results of the first systematic numerical computations over a wide range of aerosol properties. We demonstrate that it is possible to perform mass computations of aerosol loading, which is an important climate parameter. We show that discrepancies found between theoretical predictions and observations can be attributed to the effect of the expected charge acquired by the dust particles through contact electrification occurring in dust storms. While frequencies below 10 GHz normally allow for long‐distance signal transmission, the charge‐induced resonances in particles can preferentially amplify the low‐frequency MW attenuation by a factor of 10 or more, depending on their surface electric potential. In addition, we find electrically charged particles dispersed in a local atmosphere as a potential tool for the controlled manipulation of MW attenuation.

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Scattering and attenuation of electromagnetic waves by partly charged particles

Cited by 23 publications

References 19 publications

Electromagnetic Response of Clustered Charged Particles

Electromagnetic Response of Clustered Charged Particles

Earth and Martian Sand and Dust Storms: A Comprehensive Review of Attenuation Modelling and Measurements

The Nature, Amplitude and Control of Microwave Attenuation in the Atmosphere

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