Measurement of complex dielectric constant of sand and dust particles as a function of moisture content

Vishvakarma, Babau R.; Rai, C. S.

doi:10.1109/euma.1993.336630

Cited by 3 publications

(5 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Section: Experiments Results and Discussioncontrasting

confidence: 64%

“…This result challenges the point from [7] and [8], which stated that finer particles provide higher attenuation. The difference between research in this paper and in [7] and [8] is Target Bottom of Sample the test frequency. All the results and conclusion from [7] and [8] were conducted at X-bands or lower (0.5-12.6 GHz) and the corresponding wavelength is much larger than the sample particles.…”

Section: Experiments Results and Discussioncontrasting

confidence: 64%

“…The difference between research in this paper and in [7] and [8] is Target Bottom of Sample the test frequency. All the results and conclusion from [7] and [8] were conducted at X-bands or lower (0.5-12.6 GHz) and the corresponding wavelength is much larger than the sample particles. However, in the experiments in this paper, the wavelength is 2 mm at 150 GHz which is equivalent to the size of some large granule size samples, like fraction A, B, C and some of natural sand.…”

Section: Experiments Results and Discussionmentioning

confidence: 79%

“…Many Research [7]- [9] has been conducted to investigate the attenuation of Electro-Magnetic (EM) waves in sand. In [7] and [8] a dielectric constant of sand with different particle sizes and different moisture levels was measured at 10.45 GHz and 11 GHz, respectively. The results of these works indicate that finer particles will lead to higher attenuation for both dry and moist conditions.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Characterisation of attenuation by sand in low-THz band

Norouzian

Marchetti

et al. 2017

2017 IEEE Radar Conference (RadarConf)

View full text Add to dashboard Cite

Research to quantify the attenuation of 150 GHz and 300 GHz EM waves in sand has been conducted and the results are presented in this paper to investigate the performance of low-THz sensing for outdoor applications when a antenna radome might be contaminated by sand, which is one of the most common types of contaminant in outdoor environments. The signal power deviation has been studied as a function of sand thickness and granule size. Five kinds of granule-size-calibrated silica sands and natural sand were used in the experiment. While the results confirms expected greater attenuation at 300 GHz than that at 150 GHz, it has also been shown that sand composed of coarser particles provide greater attenuation than that of finer particles, which challenges some previously reported results.

show abstract

Section: Experiments Results and Discussioncontrasting

confidence: 64%

Section: Experiments Results and Discussioncontrasting

confidence: 64%

Section: Experiments Results and Discussionmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Characterisation of attenuation by sand in low-THz band

Norouzian

Marchetti

et al. 2017

2017 IEEE Radar Conference (RadarConf)

View full text Add to dashboard Cite

show abstract

“…In order to simulate water content measurement, we must know the dielectric constant of material which fills the sensor layer. For this reason, we used percentage water content and complex relative permittivity data taken from [30], and dielectric constant of sensor layer is defined as ε i = ε r −jε r . The numerical data are seen in the inset of Fig.…”

Section: Srds Based Moisture Sensormentioning

confidence: 99%

Chiral Metamaterial Based Multifunctional Sensor Applications

Karaaslan¹,

Bakır²

2014

PIER

View full text Add to dashboard Cite

Abstract-In this work, sensor abilities of a chiral metamaterial based on split ring resonators with double splits (SRDS) are demonstrated both theoretically and experimentally in X band range. This study is based on transmission measurements and simulations monitoring the resonance frequency changes with respect to the thickness of the sensing layer and permittivity values. Experimental and simulated results show that the resonance frequency of the chiral metamaterial based SRDS sensor is linearly related to the permittivity and the thickness of the sensor layer which creates a suitable approach for sensing environment and organic parameters. When the sensor layer filled with the related material, changes in the tissue temperature, sand humidity and calcium chloride density lead to resonance frequency changes. The physical mechanisms are explained by using both equivalent circuit model and the fundamental sensitivity theorem of chiral sensors. This is the first study investigating a sensing mechanism based on the chiral metamaterials in X band range.

show abstract