1999 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

IEEE Transactions on Antennas and Propagation
Volume 47 Number 6, June 1999

Table of Contents for this issue

Complete paper in PDF format

Coupling Between Transmission Line Antennas: Analytic Solution, FDTD, and Measurements

Stavros V. Georgakopoulos, Student Member, IEEE, Constantine A. Balanis, Fellow, IEEE, and Craig R. Birtcher

Page 978.

Abstract:

Transmission line antennas are widely used elements. Analytical formulations for the coupling between transmission line antennas, e.g., loops and inverted-L's, are developed. Furthermore, corrected current distributions that exhibit nonzero input current at the antiresonances of such elements are derived. The analytical results are compared with finite-difference time-domain (FDTD) calculations and measurements. Also, the physics of coupling is discussed. Finally, an FDTD technique that efficiently computes the two-port network parameters of a system of two antennas is developed based on a source with an internal resistance.

References

  1. R. W. King and C. W. Harrison, Antennas and Waves.Cambridge, MA: MIT Press, 1969.
  2. A. D. Wunsch and S.-P. Hu, "A closed-form expression for the driving-point impedance of the small inverted L antenna," IEEE Trans. Antennas Propagat., vol. 44, pp. 236-242, Feb. 1996.
  3. K. S. Yee, "Numerical solution of initial boundary value problems involving Maxwell's equations in isotropic media," IEEE Trans. Antennas Propagat., vol. AP-14, pp. 302-307, May 1966.
  4. A. Taflove, Computational Electrodynamics: The Finite-Difference Time-Domain Method.Boston, MA: Artech House, 1995.
  5. K. S. Kunz and R. J. Luebbers, The Finite Difference Time Domain Method for Electromagnetics.Boca Raton, FL: CRC, 1993.
  6. P. S. Carter, "Circuit relations in radiating systems and application to antenna problems," Proc. IRE, vol. 25, pp. 1004-1041, June 1932.
  7. S. A. Schelkunoff and H. T. Friis, Antennas-Theory and Practice.New York: Wiley, 1952.
  8. C. A. Balanis, Antenna Theory: Analysis and Design.New York: Wiley, 1997.
  9. S. V. Georgakopoulos, "Coupling between multiple wire antennas on complex structures," M.S. thesis, Arizona State University, Tempe, 1998.
  10. D. M. Pozar, Microwave Engineering.Reading, MA: Addison-Wesley, 1990.
  11. A. Reineix and B. Jecko, "Analysis of microstrip patch antennas using finite difference time domain method," IEEE Trans. Antennas Propagat., vol. 37, pp. 1361-1369, Nov. 1989.
  12. M. Piket-May, A. Taflove, and J. Baron, "FD-TD modeling of digital signal propagation in 3-D circuits with passive and active loads," IEEE Trans. Microwave Theory Tech., vol. 42, pp. 1514-1523, Aug. 1994.
  13. R. J. Luebbers and H. S. Langdon, "A simple feed model that reduces time steps needed for FDTD antenna and microstrip calculations," IEEE Trans. Antennas Propagat., vol. 44, pp. 1000-1005, July 1996.