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 Antennas and Propagation
Volume 48 Number 2, February 2000

Table of Contents for this issue

Complete paper in PDF format

Coplanar Waveguide-Fed Circularly Polarized M icrostrip Antenna

Chih-Yu Huang and Kin-Lu Wong

Page 328.

Abstract:

Design of a square microstrip antenna for obtaining circular polarization (CP) radiation using a coplanar waveguide (CPW) feed is presented. This CP design is achieved by insetting a slit to the boundary of the square microstrip patch, which makes possible the splitting of the dominant resonant mode into two near-degenerate orthogonal modes for CP radiation and introducing an inclined slot in the CPW feed line for coupling the electromagnetic (EM) energy of the CPW to the square patch. Good impedance matching for CP operation can be obtained by adjusting the inclined slot length and the tuning-stub length of the CPW feed line. Typical experimental results are presented and discussed.

References

  1. W. Menzel and W. Grabherr, "A microstrip patch antenna with coplanar feed line", IEEE Microwave Guided Wave Lett., vol. 1, pp.  340-342, Nov.  1991.
  2. S. M. Deng, M. D. Wu and P. Hsu, "Impedance characteristics of microstrip antennas excited by coplanar waveguides with inductive or capacitive coupling slot", IEEE Microwave Guided Wave Lett., vol. 5, pp.  391-393, Nov.  1995.
  3. S. M. Deng, M. D. Wu and P. Hsu, "Analysis of coplanar waveguide-fed microstrip antennas", IEEE Trans. Antennas Propagat., vol. 43, pp.  734-737, July  1995.
  4. G. Forma and J. M. Laheurte, "CPW-fed oscillating microstrip antennas", Electron. Lett., vol. 32, pp.  85-86, Jan.  1996.
  5. K. L. Wong, W. H. Hsu and C. K. Wu, "Single-feed circularly polarized microstrip antenna with a slit", Microwave Opt. Technol. Lett., vol. 18, pp.  306-308, July  1998.
  6. P. C. Sharma and K. C. Gupta, "Analysis and optimized design of single feed circularly polarized microstrip antennas", IEEE Trans. Antennas Propagat., vol. 31, pp.  949-955, June  1983.