Advertisement

Broadband Self-Complementary Antenna Arrays

  • Mats Gustafsson

In this paper, it is shown that stacking of dielectric slabs above planar self complementary antenna elements can reduce the degrading effect of the ground plane and hence be used to design broadband antenna arrays. The dielectric slabs act as filters and transform the impedance of the antenna elements. The slabs are chosen to be of equal optical thickness, and, hence, resembling the use of quarter-wavelength transformers in broadband matching resembling the use of quarter. The Bode-Fano theory is used to derive limitations on the bandwidth as a function of the Q-factor. Although the limitations are based on an approximate circuit model the results are useful and enhance our understanding of the planar array. Moreover it is shown that the self complementary patch array o®ers the possibility to design an in principle grating lobe free broadband array. Of course, this requires a very short inter element spacing and hence a very complex feeding network. Numerical results are presented for the in finte antenna array with broadside bandwidths of 4.7:1 at -13dB and of 5.5:1 at -17dB for the cases of two and three dielectric slabs, respectively.

Keywords

Antenna Array Input Impedance Ground Plane Antenna Element Perfectly Electric Conductor 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    J. D. Kraus and R. J. Marhefka, Antennas, 3rd ed. New York: McGraw-Hill, 2002.Google Scholar
  2. 2.
    Y. Mushiake, “Self-complementary antennas,” IEEE Antennas and Propagation Magazine, vol. 34, no. 6, pp. 23-29, 1992.CrossRefADSGoogle Scholar
  3. 3.
    X. Dardenne and C. Craeye, “Simulation of the effects of a ground plane on the radiation characteristics of self-complementary arrays,” IEEE Antennas and Propagation Society Inter-national Symposium, vol. 1, pp. 383-386, 2003.Google Scholar
  4. 4.
    B. Munk, Finite Antenna Arrays and FSS. New York: John Wiley & Sons, 2003.CrossRefGoogle Scholar
  5. 5.
    S. J. Orfanidis, “Electromagnetic waves and antennas,” 2002, www.ece.rutgers.edu/orfanidi/ewa, revision date June 21, 2004.
  6. 6.
    D. M. Pozar, Microwave Engineering. New York: John Wiley & Sons, 1998.Google Scholar
  7. 7.
    E. G. Magill and H. A. Wheeler, “Wide-angle impedance matching of a planar array antenna by a dielectric sheet,” IEEE Trans. Antennas Propagat., vol. 14, no. 1, pp. 49-53, 1966.CrossRefADSGoogle Scholar
  8. 8.
    D. McGrath and C. Baum, “Scanning and impedance properties of TEM horn arrays for transient radiation,” IEEE Trans. Antennas Propagat., vol. 47, no. 3, pp. 469-473, 1999.CrossRefADSGoogle Scholar
  9. 9.
    A. F. Peterson, S. L. Ray, and R. Mittra, Computational Methods for Electromagnetics. New York: IEEE Press, 1998.Google Scholar
  10. 10.
    H. Holter and H. Steyskal, “Infinite phased-array analysis using FDTD periodic boundary conditions—pulse scanning in oblique directions,” IEEE Trans. Antennas Propagat., vol. 47, no. 10, pp. 1508-1514, 1999.MATHCrossRefMathSciNetADSGoogle Scholar
  11. 11.
    M. Gustafsson, “RCS reduction of integrated antenna arrays with resistive sheets,” J. Electro. Waves Applic., vol. 20, no. 1, pp. 27-40, 2006.CrossRefGoogle Scholar
  12. 12.
    J. Johnson and Y. Rahmat-Samii, “Genetic algorithms in engineering electromagnetics,” IEEE Antennas and Propagation Magazine, vol. 39, no. 4, pp. 7-21, 1997.CrossRefADSGoogle Scholar
  13. 13.
    M. Gustafsson, “Broadband array antennas using a self-complementary antenna array and dielectric slabs,” Lund Institute of Technology, Department of Electroscience, P.O. Box 118, S-221 00 Lund, Sweden, Tech. Rep. LUTEDX/(TEAT-7129)/1-8/(2004), 2004, http://www.es.lth.se.
  14. 14.
    ——, “Broadband array antennas using a self-complementary antenna array and dielectric slabs,” in Antennas and Propagation Society International Symposium. IEEE., 2006.Google Scholar
  15. 15.
    R. M. Fano, “Theoretical limitations on the broadband matching of arbitrary impedances,” Journal of the Franklin Institute, vol. 249, no. 1,2, pp. 57-83 and 139-154, 1950.CrossRefMathSciNetGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Mats Gustafsson
    • 1
  1. 1.Department of ElectroscienceLund UniversitySweden

Personalised recommendations