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IEEE Transactions on Antennas and Propagation
Volume 48 Number 6, June 2000

Table of Contents for this issue

Complete paper in PDF format

Conformal Strip Excitation of Dielectric Resonator Antenna

Kwok Wa Leung Member, IEEE

Page 961.

Abstract:

In this paper, a new excitation scheme that employs a conducting conformal strip is proposed for dielectric resonator antenna (DRA) excitation. The new excitation scheme is successfully demonstrated by using a hemispherical DRA whose exact Green function is found using the mode-matching method. The moment method is used to solve the unknown strip current from which the input impedance is obtained. Novel recurrence formulas were obtained so that the impedance integrals are evaluated analytically. This solves the singularity problem of the Green function and substantially reduces the computation time. An experiment was carried out to verify the theory. The co-and cross-polarized field patterns are also shown in this paper. In addition, an experimental technique which deals with the problem of an air gap between the DRA and the ground plane is presented.

References

  1. S. A. Long, M. W. McAllister and L. C. Shen, "The resonant cylindrical dielectric cavity antenna", IEEE Trans. Antennas Propagat., vol. AP-31, pp.  406-412,  May  1983.
  2. M. W. McAllister, S. A. Long and G. L. Conway, "Rectangular dielectric resonator antenna", Electron. Lett., vol. 19, pp.  218-219, Mar.  1983 .
  3. M. W. McAllister and S. A. Long, "Resonant hemispherical dielectric antenna", Electron. Lett., vol. 20, pp.  657-659, Aug.  1984 .
  4. K. W. Leung, K. M. Luk, K. Y. A. Lai and D. Lin, "Theory and experiment of a coaxial probe fed dielectric resonator antenna", IEEE Trans. Antennas Propagat., vol. 41, pp.  1390-1398, Oct.  1993.
  5. G. P. Junker, A. A. Kishk and A. W. Glisson, "Input impedance of dielectric resonator antennas excited by a coaxial probe", IEEE Trans. Antennas Propagat., vol. 42, pp.  960-966,  July  1994.
  6. K. L. Wong, N. C. Chen and H. T. Chen, "Analysis of a hemisphere dielectric resonator antenna with an airgap", IEEE Microwave Guided Wave Lett., vol. 3, pp.  355-357,  Oct.  1993.
  7. S. M. Shum and K. M. Luk, "FDTD analysis of probe-fed cylindrical dielectric resonator antenna", IEEE Trans. Antennas Propagat., vol. 46, pp.  325-333,  Mar.  1998.
  8. J. T. H. St. Martin, Y. M. M. Antar, A. A. Kishk and A. Ittipiboon, "Dielectric resonator antenna using aperture coupling", Electron. Lett., vol. 26, pp.  2015-2016, Nov.  1990.
  9. K. W. Leung, K. M. Luk, K. Y. A. Lai and D. Lin, "Theory and experiment of an aperture-coupled hemispherical dielectric resonator antenna", IEEE Trans. Antennas Propagat., vol. 43, pp.  1192-1198, Nov.  1995.
  10. G. P. Junker, A. A. Kishk and A. W. Glisson, "Input impedance of aperture-coupled dielectric resonator antennas", IEEE Trans. Antennas Propagat., vol. 44, pp.  600-607,  May  1996.
  11. Y. M. M. Antar and Z. Fan, "Theoretical investigation of aperture-coupled rectangular dielectric resonator", Inst. Elect. Eng. Proc. Microwave Antennas Propagat., vol. 143, pp.  113-118, Apr.  1996.
  12. R. K. Mongia, A. Ittipiboon, Y. M. M. Antar, P. Bhartia and M. Cuhaci, "A half-split cylindrical dielectric resonator antenna using slot-coupling", IEEE Microwave Guided Wave Lett., vol. 3, pp.  38-339, Feb.  1993.
  13. N. C. Chen, K. L. Wong and K. W. Leung, "Input impedance of inclined printed slot antennas and inclined-slot-coupled dielectric resonator antennas", Microwave Opt. Technol. Lett., vol. 12, pp.  47-50, May  1996.
  14. R. A. Kranenburg and S. A. Long, "Microstrip transmission line excitation of dielectric resonator antennas", Electron. Lett., vol. 24, pp.  1156-1157,  Sept.  1988.
  15. K. W. Leung, K. Y. Chow, K. M. Luk and E. K. N. Yung, "Low-profile circular disk DR antenna of very high permittivity excited by a microstripline", Electron. Lett., vol. 33, pp.  1004-1005,  June  1997.
  16. R. A. Kranenburg, S. A. Long and J. T. Williams, "Coplanar waveguide excitation of dielectric resonator antennas", IEEE Trans. Antennas Propagat., vol. 39, pp.  119-122, Jan.  1991.
  17. K. W. Leung, K. Y. Chow, K. M. Luk and E. K. N. Yung, "Excitation of dielectric resonator antenna using a soldered-through probe", Electron. Lett., vol. 33, pp.  349-350, Feb.  1997.
  18. K. W. Leung and M. W. To, "Aperture-coupled dielectric resonator antenna with a perpendicular feed", Electron. Lett., vol. 33, no. 12, pp.  1000-1001, June  1997.
  19. K. W. Leung, "Analysis of aperture-coupled hemispherical dielectric resonator antenna with a perpendicular feed", IEEE Trans. Antennas Propagat., pp.  XXX-XXX, June  2000.
  20. G. P. Junker, A. A. Kishk, A. W. Glisson and D. Kajfez, "Effect of fabrication imperfections for ground-plane-backed dielectric resonator antennas", IEEE Antennas Propagat. Mag., vol.  37, no. 1, pp.  40-46, 1995.
  21. R. K. Mongia, A. Ittipiboon, M. Cuhaci and D. Roscoe, "Circularly polarized dielectric resonator antenna", Electron. Lett., vol. 30, pp.  1361-1362, Aug.  1994 .
  22. G. Drossos, Z. Wu and L. E. Davis, "Circular polarized cylindrical dielectric resonator antenna", Electron. Lett., vol. 32, pp.  281-283, Feb.  1996 .
  23. K. W. Leung, K. K. Tse, K. M. Luk and E. K. N. Yung, "Cross-polarization characteristics of a probe-fed hemispherical dielectric resonator antenna", IEEE Trans. Antennas Propagat., vol. 47, pp.  1228-1230, July  1999.
  24. A. A. Kishk, G. Zhou and A. W. Glisson, "Analysis of dielectric-resonator antennas with emphasis on hemispherical structures", IEEE Antennas Propagat. Mag., vol.  36, pp.  20-31, Apr.  1994.
  25. R. F. Harrington, Time-Harmonic Electromagnetic Fields., New York: McGraw-Hill, 1961.
  26. K. W. Leung, "Theory and experiment of a rectangular slot on a sphere", IEEE Trans. Microwave Theory Tech., vol. 46, pp.  2117-2123, Dec.  1998.