Scattering from arbitrarily oriented dielectric disks in the physical optics regime

Levine, David M.; Meneghini, R.; Lang, Roger H.; Şeker, Ş.S.

doi:10.1364/josa.73.001255

Cited by 84 publications

(37 citation statements)

References 6 publications

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“…These equations are difficult to be solved even under ideal conditions, thus simplified assumptions have to be introduced in order to achieve tractable forms. Discrete scattering models, for describing the response of a layer containing a random collection of discrete scatters (e.g., dielectric cylinders or disks), have also been developed (see, e.g., [52][53][54][55][56]). In particular, the scattering coefficients of the layer can be computed using a distorted Born approximation, with the mean wave evaluated according to the Foldy-Lax approximation [1].…”

Section: Other Analytical Approachesmentioning

confidence: 99%

Modelling Scattering of Electromagnetic Waves in Layered Media: An Up-to-Date Perspective

Imperatore

Iodice

Pastorino

et al. 2017

International Journal of Antennas and Propagation

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This paper addresses the subject of electromagnetic wave scattering in layered media, thus covering the recent progress achieved with different approaches. Existing theories and models are analyzed, classified, and summarized on the basis of their characteristics. Emphasis is placed on both theoretical and practical application. Finally, patterns and trends in the current literature are identified and critically discussed.

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Section: Other Analytical Approachesmentioning

confidence: 99%

Modelling Scattering of Electromagnetic Waves in Layered Media: An Up-to-Date Perspective

Imperatore

Iodice

Pastorino

et al. 2017

International Journal of Antennas and Propagation

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“…The corn leaves were approximated to dielectric circular disks by ensuring the surface areas of corn leaves were equal to the total area of the corresponding circular disks [23,24]. In other words, the long and curving shape of corn leaves can be considered as several disks with randomly distributed orientations with the identical area.…”

Section: A Quantitative Relationship Between the Corn Gvwc The Corn mentioning

confidence: 99%

Gravimetric Vegetation Water Content Estimation for Corn Using L-Band Bi-Angular, Dual-Polarized Brightness Temperatures and Leaf Area Index

et al. 2015

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Abstract:In this study, an algorithm to retrieve the gravimetric vegetation water content (GVWC, %) of corn was developed. First, the method for obtaining the optical depth from L-band (1.4 GHz) bi-angular, dual-polarized brightness temperatures (TB) for short vegetation was investigated. Then, the quantitative relationship between the corn optical depth, corn GVWC and corn leaf area index (LAI) was constructed. Finally, using the Polarimetric L-band

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“…The incident wave (1) induces an internal field E q int inside the cylinder. The scattering amplitude for the cylinder is related to the internal field by (see [10,21] for details):…”

Section: Finite Constant-radius Cylinder Approximationmentioning

confidence: 99%

Microwave Scattering Models for Cylindrical Vegetation Components

Matthaeis¹,

Lang²

2005

PIER

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Abstract-This work is intended to investigate the accuracy of modelling simple cylindrical vegetation structures for microwave remote sensing applications. Plane wave scattering by dielectric cylinders of finite length and circular cross section is examined. Cylinders with a radius that varies linearly along the cylinder length -hereafter referred to as tapered cylinders -are also considered. Exact expressions for the scattering cross section do not exist for those objects. Numerical methods can provide accurate results, but they are computationally intensive and therefore less suitable when calculations on a large number of scatterers of different sizes and orientations are necessary. In this paper the scattering cross section of finite cylinders is computed by physical optics methods, which are faster and often employed in microwave vegetation models. Tapered cylinders are modelled by a number of coaxial finite cylinders stacked on top of each other. To check the validity of the results, the problems are also solved numerically by the moment method. For cases often encountered in vegetation studies, the results of the application of the approximate analytical methods are then compared with the corresponding numerical solution. For both constantradius and tapered cylindrical structures, a good agreement with the numerical solution is found in the region of the main scattering lobe, which is the one of interest when considering complex media such as vegetation canopies. However, the accuracy of the approximate solutions decreases as the angle of the incident wave approaches the end-on angle.

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Scattering from arbitrarily oriented dielectric disks in the physical optics regime

Cited by 84 publications

References 6 publications

Modelling Scattering of Electromagnetic Waves in Layered Media: An Up-to-Date Perspective

Modelling Scattering of Electromagnetic Waves in Layered Media: An Up-to-Date Perspective

Gravimetric Vegetation Water Content Estimation for Corn Using L-Band Bi-Angular, Dual-Polarized Brightness Temperatures and Leaf Area Index

Microwave Scattering Models for Cylindrical Vegetation Components

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