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IEEE Transactions on Antennas and Propagation
Volume 47 Number 2, February 1999

Table of Contents for this issue

Complete paper in PDF format

Switched Parasitic Elements for Antenna Diversity

Rodney Vaughan, Senior Member, IEEE

Page 399.

Abstract:

Switched parasitic elements provide a useful implementation of antenna pattern diversity. The basic principle is presented with some examples of wire antennas computed using the method of moments. The modeled diversity gain available from selection combining of uncorrelated signals is used to quantify the expected improvement relative to nondiversity antennas. The advantage of the switched parasitic concept is that it is a relatively simple system, which can give the adaptive antenna performance of many branch selection or switched diversity.

References

  1. R. H. Clarke, "A statistical theory of mobile radio reception," Bell Syst. Tech. J., vol. 47, pp. 957-1000, 1969.
  2. J. N. Pierce and S. Stein, "Multiple diversity with nonindependent fading," Proc. IRE, vol. 48, pp. 89-104, Jan. 1960.
  3. W. C. Jakes, Ed., Microwave Mobile Communications.New York: Wiley, 1974 (reprint New York: IEEE Press, 1993).
  4. R. G. Vaughan and J. Bach Andersen, "Antenna diversity in mobile communications," IEEE Trans. Veh. Technol., vol. VT-36, pp. 149-172, Nov. 1987.
  5. Y. Ebine and Y. Yamada, "Vehicle-mounted diversity antennas for land mobile radios," in Proc. IEEE Conf. Veh. Technol., Philadelphia, PA, June 1988, pp. 326-333.
  6. A. T. Adams, "Dipole plus parasitic element," IEEE Trans. Antennas Propagat., vol. AP-19, pp. 536-537, July 1971.
  7. Y. Zhang, K. Hirasawa, and K. Fujimoto, "Opened parasitic elements nearby a driven dipole," IEEE Trans. Antennas Propagat. vol. AP-34, pp. 711-713, May 1986.
  8. M. Gueguen, "Electronically step-by-step rotated directive radiation beam antenna," U.S. Patent 3846799, filed Aug. 1973, issued Nov. 1974.
  9. R. M. T. Milne, "A small adaptive array antenna for mobile communications," in IEEE Antennas Propagat. Symp. Dig., Blacksburg, VA, June 1985, pp. 797-800.
  10. M. Hamer and M. Butcher, "Experimental vehicular angle-diversity antenna using mutual coupling," in Proc. Antennas Propagat. Soc. Int. Symp., Chicago, IL, July 1992, vol. 2, pp. 1089-1091.
  11. R. G. Vaughan and N. L. Scott, "Antennas for FPLMTS," in Proc. 4th Int. Symp. Personal, Indoor, Mobile Radio Commun., Yokohama, Sept. 1993, pp. 562-566.
  12. --, "Evaluation of antenna configurations for reduced power absorption in the head," IEEE Trans. Veh. Technol., to be published.
  13. G. F. Pedersen and J. Bach Andersen, "Integrated antennas for handheld terminals with low absorption," in Proc. 44th IEEE Veh. Technol. Soc. Conf., Stockholm, Sweden, June 1994, pp. 1537-1541.
  14. R. G. Vaughan, "Two port higher mode circular microstrip antennas," IEEE Trans. Antennas Propagat., vol. 36, pp. 1365-1374, Oct. 1988.
  15. O. Nørklit, P. C. F. Eggers, and J. Bach Andersen, "Jitter diversity in multipath environments," in Proc. IEEE Veh. Technol. Soc. Conf., Chicago, IL, 1995, vol. 2, pp. 853-857.