2000 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 Microwave Theory and Techniques
Volume 48 Number 2, February 2000

Table of Contents for this issue

Complete paper in PDF format

A Full-Wave Electromagnetic Model for the Waveguide-to-Strip-Line Coupler Using Vias for Confinement of Parallel-Plate Modes

Allan Østergaard

Page 226.

Abstract:

This paper presents a practical waveguide-to-strip-line coupler. An accurate integral-equation model satisfying all boundary conditions for the electromagnetic fields and all edge conditions for the currents are described. The integral equations are solved using the method of moments. An experimental -5-dB coupler has been built. Measured and computed scattering parameters are in excellent agreement. The waveguide-to-strip-line coupling terms agrees within 0.1 dB at the resonance frequency. The discussion and the presented data provides physical insight to the operation of the coupler itself.

References

  1. R. J. Mailloux, "Antenna array architecture", Proc. IEEE , vol. 80, pp.  163-172, Jan.  1992.
  2. H. A. Bethe, "Theory of diffraction by small holes", Phys. Rev., no. 66, pp.  163-182, 1944.
  3. H. Perini and P. Sferrazza, "Rectangular waveguide to strip transmission line directional couplers", in IRE Wescon Conv. Rec., 1957, pp.  16-21. 
  4. J. Kassner and W. Menzel, "An electromagnetically coupled package feed-through structure for multilayer carrier substrates", in 28th European Microwave Conf., vol. 2, Amsterdam, The Netherlands,Oct. 6-8 1998, pp.  428-432. 
  5. A. Østergaard, "Spectral domain integral equation model of a probe feed microstrip antenna", Ph.D. dissertation, Dept. Electromag. Syst., Tech. Univ. Denmark, Lyngby , Denmark, Dec. 1994.
  6. Y. Rahmat-Samii, "On the question of computation of the dyadic Green's function at the source region in waveguides and cavities ", IEEE Trans. Microwave Theory Tech., vol. MTT-23, pp.  762-765, Sept.  1975.
  7. P. Slättman and A. Østergaard, "A study of an electric field integral equation in the space domain for layered media", Dept. Electromag. Syst., Tech. Univ. Denmark, Lyngby, Denmark, Tech. Rep. R594, Sept. 1994.
  8. A. Østergaard, "An algorithm for numerical computation of dyadic Green's functions in multi layered media", ESA/ESTEC Electromag. Div., Noordwijk, The Netherlands , ESTEC Working Paper 1709, Feb. 1993.
  9. R. F. Harrington, Time Harmonic Electromagnetic Fields , ser. (McGraw-Hill Elec. Electron. Eng. Series). New York: McGraw-Hill , 1961.
  10. R. W. Jackson and D. M. Pozar, "Full-wave analysis of microstrip open-end and gap discontinuities", IEEE Trans. Microwave Theory Tech., vol. MTT-33 , pp.  1036-1042, Oct.  1985.
  11. T. Itoh, Ed. Numerical Techniques for Microwave and Milimeter-Wave Passive Structures, New York: Wiley, 1989, ch. 5.
  12. U. V. Gothelf and A. Østergaard, "Full wave analysis of a two slot microstrip filter using a new algorithm for computation of the spectral integrals", IEEE Trans. Microwave Theory Tech., vol. 41, pp.  101-108, Jan.  1993.
  13. C. A. Balanis, Antenna Theory-Analysis and Design, 2nd ed.   New York: Wiley , 1997.
  14. "Measuring Noninsertable Devices", Hewlett-Packard Company, Englewood, NJ, Tech. Rep. 8510-13, 1997.
  15. H. A. Wheeler, "Transmission-line properties of a strip line between parallel plates", IEEE Trans. Microwave Theory Tech., vol. MTT-26 , pp.  866-876, Nov.  1978.