Limitations of Rayleigh scattering in the prediction of millimeter wave attenuation in sand and dust storms

Vishvakarma, Babau R.; Rai, Chand

doi:10.1109/igarss.1993.322546

Cited by 16 publications

(10 citation statements)

References 2 publications

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“…The total electromagnetic field around the scattering object is split into an incident and a scattered field as shown in Fig. 1 [4]: The total amplitude of the fields at any point on the surface of the sphere can be given as [5]:…”

Section: Theory Of Single-particle Scatteringmentioning

confidence: 99%

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Prediction of Signal Attenuation Due to Duststorms Using Mie Scattering

Islam¹,

Elshaikh²,

Khalifa³

et al. 2010

IIUMEJ

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The present trend in radio design calls for the use of frequencies above 40 GHz for short links carrying wide-band digital communication signals. In order to utilize the new frequency band efficiently, signal attenuation studies due to duststorms is needed urgently for desert areas. This paper presents a mathematical model which has been developed to predict the signal attenuation due to duststorm. The proposed model enables the convenient calculation of the signal path attenuation based on Mie solution of Maxwell's equations for the scattering of electromagnetic wave by dust particles. The predicted values from the proposed mathematical model are compared with the measured values observed in Saudi Arabia and Sudan and show relatively close agreement.

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Section: Theory Of Single-particle Scatteringmentioning

confidence: 99%

“…In the Rayleigh approximation, the field inside the scattering particle is not modeled properly. For an exact solution the scattered field reflects all the properties of the object which is no longer true for an approximation solution [5].…”

Section: Rayleigh Approximationmentioning

confidence: 99%

Prediction of Signal Attenuation Due to Duststorms Using Mie Scattering

Islam¹,

Elshaikh²,

Khalifa³

et al. 2010

IIUMEJ

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“…When the dust particle sizes become comparable to the RF wavelength, scattering can also contribute significantly to transmission loss. Several studies have been conducted to measure and model the effects of dust storms at MMW frequencies [1][2][3][4]. These efforts focused on frequencies around 40 GHz for RF communication studies over long path lengths.…”

Section: Introductionmentioning

confidence: 99%

Millimeter-wave propagation through a controlled dust environment

Wikner

2007

SPIE Proceedings

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A one-week experiment was conducted to determine the millimeter-wave transmission loss due to dust. Transmission data was collected at 35, 94, and 217 GHz through a recirculating dust tunnel. Dust clouds of various densities were measured during the experiment. The millimeter-wave measurements were non-coherent, using transmitting sources on one side of the dust tunnel and antenna/detectors on the other. The hardware was designed to minimize noise and drift. Even so, it was found that the transmission loss across the 1-m dust tunnel at high dust densities was lower than could be measured accurately with the equipment. Therefore, the results given are limited to system noise and represent maximum transmission losses at the various frequencies. The results show losses less than 0.02 and 0.08 dB for 94 and 217 GHz respectively across one meter of dust with density 3000 mg/m 3 . The actual losses are lower and a long baseline interferometer will be required to determine the loss values precisely. Despite the limitations of the experiment, the data show that millimeter-wave imager performance will not be significantly impacted by even a very dense dust cloud.

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“…A number of papers have addressed the problem of prediction of the amount of attenuation and phase shift in sand storms [1][2][3][4][5][6]. Simultaneously, these literatures have showed that the size distribution, moisture content, visibility and frequency have major impact on microwave propagation in sand/dust storms.…”

Section: Introductionmentioning

confidence: 99%

Microwave propagation in charged sand particles

Dong

Jia-dong

et al. 2010

Proceedings of the 9th International Symposium on Antennas, Propagation and EM Theory

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Based on the forward scattering amplitude function for charged sand particle under the Rayleigh approximation, the calculation model of microwave attenuation due to charged sand particles is given in terms of equisized distribution and exponential distribution. The attenuation is calculated and analyzed. The results show that the attenuation with charged sand is larger than without regard to charges on the sand surface, and the more concentrative the surface charges on sand particles are, the greater are the influence on microwave attenuation. The attenuation due to the sand particles following exponential distribution is greater than that due to the sand particles for the equisized distribution.

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Limitations of Rayleigh scattering in the prediction of millimeter wave attenuation in sand and dust storms

Cited by 16 publications

References 2 publications

Prediction of Signal Attenuation Due to Duststorms Using Mie Scattering

Prediction of Signal Attenuation Due to Duststorms Using Mie Scattering

Millimeter-wave propagation through a controlled dust environment

Microwave propagation in charged sand particles

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