volume | PIER Journals

Abstract

ƒA novel compact circularly polarized microstrip antenna (CPMA) with bandwidth enhancement is proposed and studied. By employing capacitive loading and inductive loading, the size miniaturization is achieved. The cross-shaped aperture in the ground plane is able to excite two orthogonal modes. The near-equal amplitudes and 90° phase difference between these two modes are realized by properly designing the feed network, i.e., a 0°-90° hybrid comprising a 3-dB Wilkinson power divider cascaded with a 90° phase shifter. The proposed antenna exhibits a global bandwidth of 11.5% ranging from 1.88 GHz to 2.11 GHz with an overall size 50 mm × 50 mm × 6.8 mm (0.33λ₀ × 0.33λ₀ × 0.045λ₀). The global bandwidth is defined where return loss is larger than 10 dB, broadside axial ratio (AR) smaller than 3 dB, and gain above 0 dBic.

1. Bahl, I. J. and P. Bhartia, Microstrip Antennas, Artech House, Dedham, MA, 1980.

2. James, J. R., P. S. Hall, and C. Wood, Microstrip Antenna Theory and Design, Peter Peregrinus, London, U.K., 1981.
doi:10.1049/PBEW012E

3. Carver, K. R. and J. W. Mink, "Microstrip antenna technology," IEEE Trans. Antennas Propag., Vol. 29, No. 1, 2-24, 1981.
doi:10.1109/TAP.1981.1142523

4. Pozar, D. M., "Microstrip antennas," Proceedings of the IEEE, Vol. 80, No. 1, 79-91, 1992.
doi:10.1109/5.119568

5. Targonski, S. D. and D. M. Pozar, "Design of wide-band circularly polarized aperture coupled microstrip antenna," IEEE Trans. Antennas Propag., Vol. 41, No. 2, 214-220, 1993.
doi:10.1109/8.214613

6. Gardiol, F. E. and J. F. Zuercher, "Broad-band patch antennas — A SSFIP update," IEEE AP-S Int. Symp. Dig., 2-5, 1996.

7. Aksun, M. I., S. L. Chuang, and Y. T. Lo, "On slot-coupled microstrip antennas and their applications to CP operation — Theory and experiment," IEEE Trans. Antennas Propag., Vol. 38, No. 8, 1224-1230, 1990.
doi:10.1109/8.56958

8. Oliver, M. B., Y. M. M. Antar, R. K. Mongia, and A. Ittipiboon, "Circularly polarized rectangular dielectric resonator antenna," Electron. Lett., Vol. 31, No. 6, 418-419, 1995.
doi:10.1049/el:19950304

9. Esselle, K. P., "Circularly polarized higher-order rectangular dielectric resonator antenna," Electron. Lett., Vol. 32, No. 3, 150-151, 1996.
doi:10.1049/el:19960171

10. Li, J. X., J. Y. Guo, A. X. Zhang, W. T. Joines, and Q. H. Liu, "Miniaturized single-feed cross-aperture coupled circularly polarized microstrip patch antenna," Progress In Electromagnetics Research C, Vol. 63, 183-191, 2016.
doi:10.2528/PIERC16031301

11. Vlasits, T., E. Korolkiewicz, A. Sambell, and B. Robinson, "Performance of a cross-aperture coupled single feed circularly polarized patch antenna," Electron. Lett., Vol. 32, No. 7, 612-613, 1996.
doi:10.1049/el:19960459

12. Huang, C. Y., J. Y. Wu, and K. L. Wong, "Cross-slot-coupled microstrip antenna and dielectric resonator antenna for circular polarization," IEEE Trans. Antennas Propag., Vol. 47, No. 4, 605-609, 1999.
doi:10.1109/8.768798

13. Wong, K. L. and T. W. Chiou, "Broad-band single-patch circularly polarized microstrip antenna with dual capacitively coupled feeds," IEEE Trans. Antennas Propag., Vol. 49, No. 1, 41-44, 2001.
doi:10.1109/8.910527

14. James, J. R. and P. S. Hall, Handbook of Microstrip Antennas, Peter Peregrinus, London, U.K., 1989.

15. Lu, J. H. and C. L. Tang, "Circular polarization design of a single-feed equilateral-triangular microstrip antenna," Electron. Lett., Vol. 34, No. 4, 319-321, 1998.
doi:10.1049/el:19980232

16. Wong, K. L. and J. Y. Wu, "Single-feed small circularly polarized square microstrip antenna," Electron. Lett., Vol. 33, 1833-1834, 1997.
doi:10.1049/el:19971299

17. Yang, M., Z. N. Chen, P. Y. Lau, X. Qing, and X. Yin, "Miniaturized patch antenna with grounded strips," IEEE Trans. Antennas Propag., Vol. 63, No. 2, 843-848, 2015.
doi:10.1109/TAP.2014.2382668

Dr. Lumei Li

Professor Jianxing Li

Dr. Bin He

Dr. Songlin Zhang

Dr. Anxue Zhang