volume | PIER Journals

Abstract

In this paper, a new coplanar waveguide (CPW) feed structure is proposed to improve impedance matching of low-permittivity dielectric resonator antennas (LPDRAs). The structure is studied experimentally for a two element-rectangular LPDRA array. In the proposed structure, a horizontal strip is centrally connected at the center strip of the CPW and symmetrically added to a coplanar rectangular coupled slot. The dielectric radiators are fed by the CPW through the slot. Based on the above design concept, several antenna prototypes have been successfully designed, fabricated and tested. The measured results show that the proposed antenna exhibits unique and attractive features in terms of impedance matching, gain and the realization of an array.

1. Long, S. A., M. W. McAllister, and L. C. Shen, "The resonant cylindrical dielectric cavity antenna," IEEE Trans. Antennas Propagat., Vol. AP-31, No. 5, 406-412, 1983.
doi:10.1109/TAP.1983.1143080 Google Scholar

2. Junker, G. P., A. A. Kishk, and andA. W. Glisson, "Input impedance of dielectric resonator antennas excited by a coaxial probe," IEEE Trans. Antennas Propagat., Vol. 42, No. 7, 960-966, 1994.
doi:10.1109/8.299598 Google Scholar

3. Kranenbrug, R. A. and S. A. Long, "Microstrip transmission line excitation of dielectric resonator antennas," Electron. Lett., Vol. 24, No. 9, 1156-1157, 1988. Google Scholar

4. St. Martin, J. T. H., Y. M. M. Antar, A. A. Kishk, A. Ittipiboon, and M. Cuhaci, "Dielectric resonator antenna using aperture coupling," Electron. Lett., Vol. 26, No. 12, 2015-2016, 1990. Google Scholar

5. Kranenbrug, R. A., S. A. Long, and J. T. Williams, "Coplanar waveguide excitation of dielectric resonator antennas," IEEE Trans. Antennas Propagat., Vol. 39, No. 1, 119-122, 1991.
doi:10.1109/8.64448 Google Scholar

6. Simons, R. N. and R. Q. Lee, "Effect of parasitic dielectric resonators on CPW/aperture-coupled dielectric resonator antennas," Proc. Inst. Elect. Eng. Microwave Antennas and Propagation, Vol. 140, No. 10, 336-338, 1993. Google Scholar

7. Wu, J. Y., C. Y. Huang, and K. L. Wong, "Low-profile, very-high permittivity dielectric resonator antenna excited by a coplanar waveguide," Microw. Opt. Technol. Lett., Vol. 22, No. 1, 96-97, 1999.
doi:10.1002/(SICI)1098-2760(19990720)22:2<96::AID-MOP5>3.0.CO;2-0 Google Scholar

8. Jang, Y. W., "Broadband T-shaped microstrip-fed U-slot coupled patch antenna," Electron. Lett., Vol. 38, No. 5, 495-496, 2002.
doi:10.1049/el:20020364 Google Scholar

9. Myung, K. K., K. Kim, Y. H. Suh, and I. Park, "A T-shaped microstrip-line-fed wide slot antenna," Antennas and Propagation Society International Symposium, Vol. 3, No. 7, 1500-1503, 2000. Google Scholar

10. Kishk, A. A. and A. W. Glisson, "Bandwidth enhancement for split cylindrical dielectric resonator antennas," Progress in Electromagnetics Research, Vol. 33, 97-118, 2001. Google Scholar

Dr. Qinjiang Rao

Professor Tayeb Denidni

Dr. Abdel Sebak

Dr. Ronald Johnston