Investigation of Radar Cross Section and Electromagnetic Fields Around an Elliptical Antenna Including Magnetized Plasma Cover

Document Type : Original Article

Authors

1 Department of Laser and Photonics, Faculty of Physics,University of Kashan, Kashan, I.R. of Iran

2 Department of Laser and Photonics, Faculty of Physics, University of Kashan, Kashan, I.R. of Iran

Abstract

In the present work the scattering of EHF radio waves from a plasma elliptical hybrid antenna is investigated by the Finite Element-Boundary Integral (FE-BI) method. This antenna is made of a dielectric elliptical column covered by a plasma layer as a dispersive medium. The plasma cover has elliptical cross section and has been magnetized by an external constant magnetic field along axis of the antenna. Different geometric configurations of the antenna are examined by changing the position of the dielectric column relative to the plasma layer, so that their large diameters vary from 0 to 90 degrees relative to each other. As will be seen, due to anisotropy of geometric configuration and permittivity tensor of the plasma layer, the angle of incidence and geometrical parameters are very effective on the antenna response. Finally, numerical analysis shows how one can control profiles of the electromagnetic fields and scattering cross section of the antenna by varying the external magnetic field intensity and polarization of the incident wave. The presence of various variables in this antenna makes it significantly flexible and tunable, that is especially important in the cloaking processes.

Keywords

References

R. Eaves, “Electromagnetic scattering from a conducting circular cylinder covered with a circumferentially magnetized ferrite,” IEEE Trans. Antennas Propag, vol.24 pp. 190-197, 1976.##
 [2]   P. Darvish, B. Zakeri, A. Gorji, “Design and Implementation of a VHF Plasma Antenna,” Journal of Radar Vol. 2, No. 4, pp. 31-38, 2015. (In Persian)##
[3] G. P. Zouros, G. C. Kokkorakis, “Electromagnetic scattering by an inhomogeneous gyroelectric sphere using volume integral equation and orthogonal Dini-type basis functions,” IEEE Trans. Antennas Propagat, vol. 63 pp. 2665-2676, 2015.‏##
[4]    G. P. Zouros, “Oblique electromagnetic scattering from lossless or lossy composite elliptical dielectric cylinders,” JOSA A, vol. 30, pp. 196-205, 2013.##
[5]   M. Ostovan, S. Samadi, M. S. Helfroush, “Ground Moving Target Indicator Based on Generalized Likelihood Ratio Test (GLRT) in Single Channel SAR using Signal Space Mapping Method,” Journal of Radar, vol.7 pp. 79-91, 2019. (In Persian)##
[6]    A. Monti, J. Sonic, A. Alu, A. Toscano, F. Bilotti, “Design of cloaked Yagi-Uda antennas,” EPJ Appl. Metamat, vol. 3 pp. 1-7, 2016.##
 [7]   A. Monti, J. Soric, M. Barbuto, D. Ramaccia, S. Vellucci, F. Trotta, A. Alu, A. Toscano, F. Bilotti, “Mantle cloaking for co-site radio-frequency antennas,” Appl. Phys. Lett, vol.108 pp. 113502, 2016.##
[8]    A. Alù, N. Engheta, “Cloaking a sensor,” Phys. Rev. Lett, vol. 102 pp. 233901, 2009.##
[9]  B. Edwards, A. Alù, M.G. Silveirinha, N. Engheta, “Experimental verification of plasmonic cloaking at microwave frequencies with metamaterials,” Phys. Rev. Lett, vol. 103 pp. 153901, 2009.##
[10]  T. Naito, T. Tanaka, Y. Fukuma, O. Sakai, “Electromagnetic wave cloaking and scattering around an antiresonance-resonance symmetrical pair in the frequency domain,” Phys. Rev. E. vol. 99 pp. 013204, 2019.##
 [11] T. Naito, O. Sakai, “Analytical formulation for radiation characteristics of a surface wave sustained plasma antenna,” Phys. Plasmas, vol. 26 pp. 073506, 2019.##
[12]  M. Dehghan, R. Razavi, M. Ramezani, “Radar Cross Section Reduction of a Flat Square Plate Using Plasma Coating Caused By Alpha Particles,” Advanced Defence Sci.& Technol, vol. 03 pp. 123-129, 2019. (In Persian)##
[13]  C. L. Dolph, H. Weil, “On the change in radar cross-section of a spherical satellite caused by a plasma sheath,” Planet. Space Sci, vol. 6 pp. 123-132, 1961.‏##
[14]   R. Dutta, R. Biswas, N. Roy, “Reduction of attenuation of EM wave inside plasma formed during supersonic or hypersonic re-entry of missile like flight vehicles by the application of DC magnetic field—a technique for mitigation of RF Blackout,” In Proc. of the IEEE Applied Electromagnetics Conf., India, December 2011.##
 [15] A. F. Aleksandrov, L. S. Bogdankevich, A. A. Rukhadze, “Principles of plasma electrodynamics”; Springer, Heidelberg, 1984.##
[16]   J. Jin, “The Finite Element Method in Electromagnetics,” John Willey & Sons.  Inc. New York, 2002.‏##
 [17] S. Golharani, Z. Rahmani, B. Jazi, “The Dependence of Resonance Frequency to Landing Angle in Reciprocal Scattering Phenomena of the Waves From an Elliptical Plasma Dielectric Antenna,” IEEE Trans. Plasma Sci, vol. 47 pp. 233-242, 2018.##
[18] J. R. Wait, “Some Boundary Value Problems Involving Plasma Media”JOURNAL OF RESEARCH of the National Bureau of Standards-B. Mathematics and Mathematical Physics, vol. 65B,   No. 2, 1961.##
[19] J. Reece Roth, “ Industrial Plasma Engineering,” Institute of Physics Publishing Bristol and Philadelphia, 1995.##
Radar
Volume 8, Issue 1 - Serial Number 23
September 2020
Pages 87-95

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History

  • Receive Date: 19 July 2020
  • Revise Date: 24 October 2020
  • Accept Date: 15 November 2020
  • Publish Date: 22 August 2020

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