Application of the Shifted Frequency Internal Equivalence to Two Dimensional Lossy Objects
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Abstract
Performance of a new method, Shifted Frequency Internal Equivalence (SFIE) is studied in the analysis of scattering from two dimensional lossy objects. This method finds the solution of a wideband scattering problem faster than classical approaches.
By introducing conductivity, loss shows itself as imaginary electrical permittivity. Changing conductivity also changes the distribution of electromagnetic waves and modifies RCS plots. In this study homogeneous and inhomogeneous conductive media are investigated to widen the usage of SFIE method. By increasing conductivity skin effect phenomenon is observed, electrical dimensions are decreased and RCS plots are flattened as expected.
Numerical results obtained by SFIE are compared to the ones obtained by Method of Moments and the differences are shown.
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References
R. F. Harrington, Field Computation by Moment Methods, Macmillan, New York, US, 1968.
J. Jin, The Finite Element Method in Electromagnetics, John Wiley & Sons, New York, US, 2014.
L. Zheng-liang, G.Shu-xi, M. Ji and W.Xing, "Impedance matrix interpolation based on method of moments for solving radiation problem over a frequency band", Int. Con. On Micr. And Millimeter Wave Tech., 3, 1, 1-3, 2012.
V. V. S. Prakash and R. Mittra, "Characteristic basis function method: A new technique for efficient solution of method of moments matrix equations", Microw. And Opt. Tech., 36,2,95-100,2003.
P. Bradley, C. Brennan and M. Condon, "Efficient Wideband Electromagnetic Scattering Computation for Frequency Dependent Lossy Dielectrics Using WCAWE", IEEE Tran. on Ant. and Prop, 57, 10, 2009.
A. Ünal, S. Özdemir, A. Köksal, "A Direct Proof of SFIE", IEEE Trans. on Antennas and Propagation, Vol. 66, No. 4, pp. 2141-2142, Apr. 2018.
A. Köksal, "Shifted-Frequency Internal Equivalence", IEEE Trans. Microw. Theory Tech., Vol. 46, No. 1, pp. 76-81, Jan. 1988.
A. Köksal, "Multifrequency Formulation for Electro-magnetic Scattering Using Shifted-Frequency Internal Equivalence", IEEE Trans. Microw. Theory Tech., Vol. 47, No. 2, pp. 150-155, Feb. 1999.
S. Özdemir, A. Ünal, A. Köksal, "Application of Shifted Frequency Internal Equivalence to Multi-frequency Scattering Problems" , IEEE Trans. on Antennas and Propagation, Vol. 65, 9, Sept. 2017.
A. Ünal, A. Köksal, Kaydırılmış Frekansta İç Eş-değerlik Algoritmasının İki Boyutlu Elektromanyetik Saçılma Problemlerinde Başarımının İncelenmesi, Hacettepe University, Electrical and Electronics Engineering, MSc. Thesis, 2016.
D.K. Cheng, Fundamentals of Engineering Electro-magnetics, Pearson, 1992.
A. Ishimaru, Electromagnetic Wave Propagation, Radiation, and Scattering, Prentice Hall, 1991.
R., Curiac, I.R., Ciric, "Analysis of Wave Scattering by a Lossy Dielectric Using Single Source Surface Integral Equations", IEEE CCECE. Canadian Conference on Electrical and Computer Engineering. Conference Proceedings, 2002.