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http://dx.doi.org/10.5515/KJKIEES.2014.25.11.1183

Accuracy Examination in the RCS Computation of a Leaf Using the Resistive Sheet Technique with Various Thicknesses and Moisture Contents  

Park, Minseo (Department of Electronic Information and Communication Engineering, Hongik University)
Kim, Han-Joong (Department of Electronic Information and Communication Engineering, Hongik University)
Um, Kwiseob (Department of Electronic Information and Communication Engineering, Hongik University)
Park, Sin-Myong (Department of Electronic Information and Communication Engineering, Hongik University)
Kweon, Soon-Koo (LIG Nex1)
Oh, Yisok (Department of Electronic Information and Communication Engineering, Hongik University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.25, no.11, 2014 , pp. 1183-1189 More about this Journal
Abstract
The accuracy of the resistive-sheet technique in calculating the RCS(Radar Cross Section) of a deciduous leaf is examined in this paper for various thicknesses and dielectric constants, and a range of thicknesses for the resistive sheet technique is proposed. At first, a leaf was assumed to be a lossy dielectric disk, and the dielectric disk was again assumed to be a resistive sheet with an appropriate resistivity for a given thickness, a dielectric constant, and a frequency. Then, the RCS of the leaf was computed using the physical optics(PO) method, and was compared with the calculation results of a numerical analysis: i.e., a commercial tool based on the FEM (Finite Element Method) technique. It was shown that the error increases as the thickness increases. The error was 0.1 dB, for example, when the thickness is 1.2 mm and 3.7 dB when the thickness is 3 mm with a dielectric constant of(21.4, 9.7) at 9.6 GHz. It was also found that the error decreases as the dielectric constant increases. This study will be very useful for calculating the scattering characteristics of numerous leaves in a vegetation canopy for estimating its radar backscatter using scattering model.
Keywords
RCS; Resistive Sheet; Physical Optics; Leaf Thickness; Moisture Content;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 곽영길, "위성 영상 레이다(SAR) 기술 동향", 한국전자파학회 전자파기술지, 22(6), pp. 4-16, 2011년 11월.   과학기술학회마을
2 K. Sarabandi, T. B. Senior, and F. T. Ulaby, "Effect of curvature on the backscattering from a leaf", J. Electromagn. Waves Applicat., vol. 2, no. 7, pp. 653-670, 1988.
3 M. A. Karam, A. K. Fung, and Y. M. M. Antar, "Electromagnetic wave scattering from some vegetation samples", IEEE Trans. Geosci. Remote Sensing, vol. 26, no. 6, pp. 799-808. Nov. 1988.   DOI   ScienceOn
4 M. A. Karam, A. K. Fung, "Leaf-shape effects in electromagnetic wave scattering from vegetation", IEEE Trans. Geosci. Rem. Sens., vol. 27, no. 6, pp. 687-697, Nov. 1989.   DOI   ScienceOn
5 M. Kurum, R. H. Lang, P. E. O' Neill, A. T. Joseph, T. J. Jackson, and M. H. Cosh, "A first-order radiative transfer model for microwave radiometry of forest canopies at L-band", IEEE Trans. Geosci. Remote Sens., vol. 49, no. 9, pp. 3167-3179, Sep. 2011.   DOI   ScienceOn
6 T. B. A. Senior, K. M. Sarabandi, and F. T. Ulaby, "Measuring and modelling the backscattering cross section of a leaf", Radio Sci., vol. 22, no. 6, pp. 1109-1116, Nov. 1987.   DOI   ScienceOn
7 M. A. El-Rayes, F. T. Ulaby, "Microwave dielectric spectrum of vegetation-Part I : Experimental observations", IEEE Trans. Geosci. Remote Sensing, vol. 25, no. 5, pp. 541-549, Sep. 1987.
8 F. T. Ulaby, M. A. El-Rayes, "Microwave dielectric spectrum of vegetation-part II : Dual dispersion model", IEEE Trans. Geosci. Remote Sensing, vol. 25, no. 5, pp. 550-557, Sep. 1987.
9 Y. Oh, J. Y. Hong, "Re-examination of analytical models for microwave scattering from deciduous leaves", IET Microw. Antennas Propag., vol. 1, no. 3, pp. 617-623, Jun. 2007.   DOI   ScienceOn
10 C. A. Balanis, Advanced Engineering Electromagnetics, John Wiley & Sons, pp. 311-345, 2011.
11 R. F. Harrington, J. R. Mautz, "An impedance sheet approximation for thin dielectric shells", IEEE Trans. Antennas Propag., vol. 23, no. 4, pp. 531-534, Jul. 1975.   DOI
12 T. B. A. Senior, "Combined resistive and conductive sheets", IEEE Trans. Antennas Propag., vol. 33, no. 5, pp. 577-579, May 1985.   DOI
13 A. Reigber, R. Scheiber, M. Jager, P. Prats, I. Hajnsek, T. Jagdhuber, K. Papathanassiou, M. Nannini, E. Aguilera, S. Baumgartner, R. Horn, A. Nottensteiner, and A. Moreira, "Very high-resolution airborne synthetic aperture radar imaging: Signal processing and application", Proc. IEEE, vol. 101, no. 3, pp. 759-783, Mar. 2013.   DOI   ScienceOn