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Radiation Characteristics of an Axially Asymmetrical Slot Antenna on a Perfectly-Conducting Prolate Spheroid Coated with Homogeneous Materials

By Ming Zhang and Abdel Sebak
Progress In Electromagnetics Research, Vol. 44, 309-333, 2004
doi:10.2528/PIER03073001

Abstract

The boundary value solution of electromagnetic radiation from an axis-asymmetric slot antenna on a perfectly conducting prolate spheroid coated with a confocal sheath is presented. The electromagnetic fields are expanded in terms of prolate spheroidal vector wave functions. The unknown expansion coefficients are determined from a set of linear equations derived from the application of boundary conditions on the tangential fields' components. Numerical results for radiation patterns and power are presented. It is found that the thickness of the sheath has a significant effect on the radiated fields, and the radiated power is greatly enhanced for certain values of the sheath thickness.

Citation


Ming Zhang and Abdel Sebak, "Radiation Characteristics of an Axially Asymmetrical Slot Antenna on a Perfectly-Conducting Prolate Spheroid Coated with Homogeneous Materials," Progress In Electromagnetics Research, Vol. 44, 309-333, 2004.
doi:10.2528/PIER03073001
http://jpier.org/PIER/pier.php?paper=0307301

References


    1. Wait, J. R., "Electromagnetic radiation from spheroidal structures," Advanced Antenna Theory, 523-559, 1969.

    2. Schelkunoff, S. A., Advanced Antenna Theory, John Wiley & Sons, Inc., New York, 1962.

    3. Weeks, W. L., Electromagnetic Theory for Engineering Applications, John Wiley & Sons, Inc., New York, 1964.

    4. Wait, J. R., "Theories of prolate spheroidal antenna," Radio Sci., Vol. 1. No. 4, No. Vol. 1. 4, 1966.

    5. Do-Nhat, T. and R. H. MacPhie, "The input admittance of the thin prolate spheroidal dipole antenna with finite gap width," IEEE Trans. Antennas Propagation, No. 11, 1243-1252, 1995.

    6. Li, L. W., M. S. Lenong, T. S. Yeo, and Y. B. Gan, "Electromagnetic radiation from a prolate spheroidal antenna enclosed in a confocal spheroidal radome," IEEE Trans. Antennas Propagation, Vol. 50, No. 11, 1525-1533, 2002.
    doi:10.1109/TAP.2002.803950

    7. Zhang, M. and A. A. Sebak, "Radiation characteristics of a slot antenna on a conducting prolate spheroid," Canadian J. Phys., Vol. 73, 376-385, 1995.

    8. Flammer, C., Spheroidal Wave Functions, Stanford University Press, Stanford, California, 1957.

    9. Zhang, M., "Radiation characteristics of asymmetrically slotted spheroidal antennas," Master Thesis, No. 1, 1995.

    10. Sinha, B. P. and R. H. MacPhie, "Electromagnetic scattering by prolate spheroids for plane waves with arbitrary polarization and angle of incidence," Radio Sci., Vol. 12. No. 2, No. Vol. 12. 2, 171-184, 1997.

    11. Sebak, A. A. and B. P. Sinha, "Scattering by a conducting spheroidal object with dielectric coating at axial incidence," IEEE Trans. Antennas Propagation, Vol. 40, No. 3, 268-274, 1992.
    doi:10.1109/8.135468

    12. Mushiake, Y. and R. E. Webster, "Radiation characteristics with power gain for slot on a sphere," IRE Trans. Antennas Propagation, Vol. 5, No. 1, 47-55, 1957.
    doi:10.1109/TAP.1957.1144465

    13. Shafai, L. and R. H. Chugh, "Resonance effects in slotted spherical antenna coated with homogeneous materials," Canadian J. Phys., Vol. 51, 2341-2346, 1973.

    14. Lin, C. C. and R. E. Mu, "Improved radiation from a spherical antenna by overdense plasma coating," IEEE Trans. Antennas Propagation, Vol. 17, No. 9, 675-678, 1969.
    doi:10.1109/TAP.1969.1139506

    15. Richmond, J. H., "Axial slot antenna on dielectric-coated elliptic cylinder," IEEE Trans. Antennas Propagation, Vol. 37, No. 10, 1235-1241, 1989.
    doi:10.1109/8.43531