volume | PIER Journals

Abstract

A novel circularly polarised (CP), single-fed widebeam microstrip antenna is presented. The antenna consists of a corner-truncated square patch and a three dimensional circular ground structure. Simulated and measured results show that, owing to the ground structure, the 3 dB beamwidth of the CP radiation can reach more than 165^o, which is about 85^o, greater than that of a corresponding regular microstrip antenna. It is also shown that experimental results were in good agreement with the simulated performance. Details of the proposed 3-D circular ground structure are described, and the effects of various dimensions of the proposed ground structure on the beamwidth enhancement of CP radiation are studied.

1. Huang, J., "The finite ground plane effect on the microstrip antenna radiation patterns," IEEE Trans. Antennas Propagat., Vol. 31, 649-653, 1983.
doi:10.1109/TAP.1983.1143108 Google Scholar

2. Liu, W. C. and P. C. Kao, "Design of a probe-fed H-shaped microstrip antenna for circular polarization," Journal of Electromagnetic Waves and Applications, Vol. 21, No. 7, 857-864, 2007.
doi:10.1163/156939307780748986 Google Scholar

3. Kishk, A. A., L. Shafai, and , "The effect of various parameters of circular microstrip antennas on their radiation efficiency and the mode excitation," IEEE Trans. Antennas Propagat., Vol. 34, 969-976, 1986.
doi:10.1109/TAP.1986.1143939 Google Scholar

4. Bhattacharyya, A. K., "Effects of finite ground plane on the radiation characteristics of a circular patch antenna," IEEE Trans. Antennas Propagat., Vol. 38, 152-159, 1990.
doi:10.1109/8.45116 Google Scholar

5. Han, T. Y. and C. Y. D. Sim, "Probe-feed circularly polarized square-ring microstrip antennas with thick substrate," Journal of Electromagnetic Waves and Applications, Vol. 21, No. 1, 71-80, 2007.
doi:10.1163/156939307779391803 Google Scholar

6. Bhattacharyya, A. K., "Effects of ground plane and dielectric truncations on the efficiency of a printed structure," IEEE Trans. Antennas Propagat., Vol. 39, 303-308, 1991.
doi:10.1109/8.76326 Google Scholar

7. Yang, S. S., K.-F. Leee, A. A. Kishk, and K.-M. Luk, "Design and study of wideband single feed circularly polarized microstrip antennas," Progress In Electromagnetics Research, Vol. 80, 45-61, 2008.
doi:10.2528/PIER07110604 Google Scholar

8. Bokhari, S. A., J. R. Mosig, and F. E. Gardiol, "Radiation pattern computation of microstrip antennas on finite size ground plane," Proc. Inst. Elect. Eng., Vol. 139, 278-286, 1992. Google Scholar

9. Sanad, M., "Microstrip antennas on very small ground planes for portable communication systems," IEEE Antennas Propagat. Soc. Int. Symp. Dig., 810-813, 1994. Google Scholar

10. Bauer, R., E. Levine, H. Matzner, and S. Strikman, "Analysis of a microstrip disk antenna with a finite ground plane," Electromag., Vol. 15, 485-497, 1995.
doi:10.1080/02726349508908437 Google Scholar

11. Noghanian, S. and L. Shafai, "Control of microstrip antenna radiation characteristics by ground plane size and shape," Proc. Inst. Elect. Eng., Vol. 145, 207-212, 1998. Google Scholar

12. Tang, C.-L., J.-Y. Chiou, and K.-L. Wong, "Beamwidth enhance ment of a circularly polarized antenna on a three-dimensional ground structrue," Microwave and Optical Technolagy Letters, Vol. 32, No. 2, 149-153, 2002.
doi:10.1002/mop.10116 Google Scholar

Dr. You-Huo Huang

Dr. Shi-Gang Zhou

Dr. Jie Ma

Professor Qi-Zhong Liu