volume | PIER Journals

Abstract

In this paper, one 3×3 and one 5×5 antenna arrays are studied. In each array, one probe-fed circularly polarized (CP) microstrip patch antenna is placed at the center as the driven antenna and is gapped coupled to the remaining elements. It is investigated that CP performance of the patch can be proved by properly arranging these parasitic elements. The driven patch is a perturbed square one with two diagonal corners truncated. The remaining elements are square patches slightly smaller than the driven patch. The proposed antennas have been constructed and measured. The 3×3 array has a measured gain of 7.7 dBic with a 3 dB axial ratio bandwidth of 3.3%. The 5×5 array has a measured gain of 9.3 dBic with a 3dB axial ratio bandwidth of 8.1%.

1. Manteghi, M., "Wideband microstrip patch antenna on a thick substrate," Antennas and Propagation Society International Symposim, Vol. 2008, 1-4, Jul. 2008.

2. Yang, R., Y. Xie, D. Li, J. Zhang, and J. Jiang, "Bandwidth enhancement of microstrip antennas with metamaterial bilayered substrates," Journal of Electromagnetic Waves and Applications, Vol. 21, No. 15, 2321-2330, 2007.
doi:10.1163/156939307783134425

3. Chang, F.-S., K.-L. Wong, and T.-W. Chiou, "Low-cost broadband circularly polarized patch antenna," IEEE Trans. Antennas and Propagation, Vol. 51, No. 10, 3006-3009, Oct. 2003.
doi:10.1109/TAP.2003.818010

4. Cui, B., J. Zhang, and X. W. Sun, "Single layer microstrip antenna arrays applied in millimeter-wave radar front-end," Journal of Electromagnetic Waves and Applications, Vol. 22, No. 1, 3-15, 2008.
doi:10.1163/156939308783122797

5. Aanandan, C. K., P. Mohanan, and K. G. Nair, "Broad-band gap coupled microstrip antenna," IEEE Trans. Antennas and Propagation, Vol. 38, No. 10, 1581-1586, 1990.
doi:10.1109/8.59771

6. Lee, R. Q., K. F. Lee, and J. Bobinchak, "Characteristics of a two-layer electromagnetically coupled rectangular patch antenna," Electronics Letters, Vol. 23, No. 20, 1301-1302, 1987.
doi:10.1049/el:19870748

7. Nishiyama, E., M. Aikawa, and S. Egashira, "Stacked microstrip antenna for high-gain and wideband," IEE Proc.-Microw. Antennas Propag., Vol. 151, No. 2, 143-148, Apr. 2004.
doi:10.1049/ip-map:20040171

8. Chang, T. N. and H. R. Sue, "Microstrip reflectarray with QUAD-EMC element," IEEE Trans. Antenna and Propagation, Vol. 53, No. 6, 1993-1997, Jun. 2005.
doi:10.1109/TAP.2005.848476

9. Wood, C., "Improved bandwidth of microstrip antennas using parasitic elements," IEE Proc. --- Microw. Antennas Propag., Vol. 127, No. 4, 231-234, Aug. 1980.

10. Chang, T. N., "Methods to excite circularly polarized waves for a quad-unit," Microwave and Optical Letter, Vol. 49, No. 10, 2372-2375, 2007.
doi:10.1002/mop.22749

11. Teshirogi, T., M. Tanaka, and W. Chujo, "Wideband circularly polarized array antenna with sequential rotations and phase shifts of elements," Antennas and Propagation Society International Symposim, 117-120, Tokyo, Japan, 1985.

12. Lu, K. H. and T. N. Chang, "Circularly polarized array antenna," IEEE Trans. Antenna and Propagation, Vol. 53, No. 10, 3288-3292, Oct. 2005.

13. Entschladen, H. and U. Nagel, "Microstrip patch array antenna," Electronics Letters, Vol. 20, No. 22, 931-933, 1984.
doi:10.1049/el:19840633

Professor The-Nan Chang

Dr. Jing-Hae Jiang