Journal of the European Optical Society - Rapid publications, Vol 10 (2015)

Electromagnetic field intensity distribution along focal region of a metallic circular reflector covered with a plasma layer

A. Ghaffar, M. A. S. Alkanhal

Abstract


Theoretical analyses has been carried out to study the deviation of the electromagnetic field intensity distribution in the focal region of a long metallic circular reflector that contains a uniform cold collisional plasma layer on its surface. The electromagnetic field intensity expressions along the focal region have been obtained using Maslov’s method. Maslov’s method is systematic procedure, which combines the simplicity of ray optics and the generality of transform methods. The derived analytical field expressions in the focal region have been solved numerically. The reflected and transmitted field intensity distributions from the plasma layer along the focal point were examined. The effects of some physical parameters such as the plasma frequency, the thickness of plasma layer and the effective collision frequency on the transmitted field intensity distribution along the focal region are studied. The results are found to be in a good agreement with results obtained using Kirchhoff’s approximation.

© The Authors. All rights reserved. [DOI: 10.2971/jeos.2015.15014]

Full Text: PDF

Citation Details


Cite this article

References


D. R. Nicholson and D. R. Nicholson, Introduction to plasma theory (Cambridge University Press, Cambridge, 1983).

V. Smilyanskii, ”Propagation of an electromagnetic wave across a magnetic field in a parabolic plasma layer,” J. Appl. Mech. Tech. Phy. 12, 366–371 (1971).

A. Niknam, M. Khajehmirzaei, B. Davoudi-Rahaghi, Z. Rahmani, B. Jazi, and A. Abdoli-Arani, ”Electromagnetic modeling of the energy distribution of a metallic cylindrical parabolic reflector covered with a magnetized plasma layer,” Phys. Plasmas 21, 073107 (2014).

B. Jazi, B. Davoudi-Rahaghi, M. R. Khajehmirzaei, and A. R. Niknam, ”Energy Distribution Along the Focal Axis of a Metallic Cylindrical Parabolic Reflector Covered With a Plasma Layer,” IEEE T. Plasma Sci. 42, 286–292 (2014).

M. Laroussi, and J. Reece Roth, ”Numerical calculation of the reflection, absorption, and transmission of microwaves by a nonuniform plasma slab,” IEEE T. Plasma Sci. 21, 366–372 (1993).

W. M. Manheimer, ”Plasma reflectors for electronic beam steering in radar systems,” IEEE T. Plasma Sci. 19, 1228–1234 (1991).

C. Thomson, and C. Chapman, ”An introduction to Maslov’s asymptotic method,” Geophys. J. Int. 83, 143–168 (1985).

R. W. Ziolkowski, and G. A. Deschamps, ”Asymptotic evaluation of high-frequency fields near a caustic: An introduction to Maslov’s method,” Radio Sci. 19, 1001–1025 (1984).

K. Hongo, and Y. Ji, ”High-frequency expression for the field in the caustic region of a cylindrical reflector using Maslov’s method,” Radio Sci. 22, 357–366 (1987).

K. Hongo, Y. Ji, and E. Nakajima, ”High-frequency expression for the field in the caustic region of a reflector using Maslov’s method,” Radio Sci. 21, 911–919 (1986).

K. Hongo, and H. Kobayashi, ”Radiation characteristics of a planoconvex lens antenna,” Radio Sci. 31, 1025–1035 (1996).

A. Ghaffar, M. Shoaib, N. Mehmood, M. Naz, M. Azam, and Q. Naqvi, ”Electromagnetic field diffraction of a paraboloidal mirror under oblique incidence,” Int. J. Appl. Electrom. 41, 479–494 (2013).

A. Ghaffar, M. Sharif, Q. Naqvi, M. Alkanhal, F. Khalid, and S. Shukurullah, ”Focusing of Electromagnetic Wave from Quartic Inhomogeneous Chiro-Slab,” Appl. Comput. Electrom. 29, 478–485 (2014).

A. Ghaffar, M. Arif, Q. A. Naqvi, and M. A. Alkanhal, ”Radiation properties of a uniaxial chiral quadratic inhomogeneous slab under oblique incidence,” Optik-International Journal for Light and Electron Optics 125, 1589–1597 (2014).

A. Ghaffar, M. H. Shahzad, M. Y. Naz, S. Ahmed, M. Sharif, Q. A. Naqvi, and A. A. Syed, ”Analysis of electromagnetic field transmitted by a uniaxial chiral lens,” J. Electromagnetic Wave. 26, 1007–1017 (2012).

W. Ali, F. Ahmad, A. A. Syed and Q. A. Naqvi, ”Effects of negative permittivity and/or Permeability on reflection and transmission from planar, circular cylindrical, and fractal chiral-chiral interfaces,” J. Electromagnetic Wave. 29, 1006375 (2015).


Journal of the European Optical Society:Rapid publications - ISSN 1990-2573. JEOS:RP is subject to the EOS General Terms and Conditions.