volume | PIER Journals

Abstract

A dual-band omnidirectional circularly polarized (CP) patch antenna with conical radiation patterns is presented in this paper. The antenna consists of a patch with inclined slots, a ground plane with L-shaped slots and a coaxial probe. In addition, by loading shorting vias between the patch and the ground plane, the vertical polarizations of the proposed antenna at TM₀₁ and TM₀₂ modes can be obtained. Two sets of slots etched on the ground and the patch contribute to the horizontal polarizations for the two modes, respectively. Omnidirectional CP fields can be achieved at both resonant modes when the two orthogonal polarizations are equal in amplitude and different in phase by 90°. To verify the design, a prototype operating at 2.4 GHz WLAN and 3.5 GHz WiMAX bands has been fabricated and measured. The measured average axial ratios (ARs) at two resonant modes in the azimuth plane are 1.1 and 1.5 dB, respectively. Experimental results show good agreement with the simulated data.

1. Yu, Y. F., Z. X. Shen, and S. L. He, "Compact omnidirectional antenna of circular polarization," IEEE Antennas Wireless Propag. Lett., Vol. 11, 1466-1469, 2012.
doi:10.1109/LAWP.2012.2231392 Google Scholar

2. Li, B., S. W. Liao, and Q. Xue, "Omnidirectional circularly polarized antenna combining monopole and loop radiators," IEEE Antennas Wireless Propag. Lett., Vol. 12, 607-610, 2013.
doi:10.1109/LAWP.2013.2255578 Google Scholar

3. Liu, Y., J. X. Wang, L. Yang, Y. Liu, X. Li, and J. Ren, "A compact omni-directional circularly polarized antenna for WLAN applications," Microwave Opt. Technol. Lett., Vol. 58, No. 5, 1011-1016, May 2016.
doi:10.1002/mop.29731 Google Scholar

4. Shi, J., X. Wu, X. M. Qing, and Z. N. Chen, "An omnidirectional circularly polarized antenna array," IEEE Trans. Antennas Propag., Vol. 64, No. 2, 574-581, Feb. 2016.
doi:10.1109/TAP.2015.2509009 Google Scholar

5. Lau, K. L. and K. M. Luk, "A wideband circularly polarized conical-beam patch antenna," IEEE Trans. Antennas Propag., Vol. 54, No. 5, 1591-1594, May 2006.
doi:10.1109/TAP.2006.874361 Google Scholar

6. Quan, X. L., R. L. Li, and M. M. Tentzeris, "A broadband omnidirectional circularly polarized antenna," IEEE Trans. Antennas Propag., Vol. 61, No. 5, 2363-2370, May 2013.
doi:10.1109/TAP.2012.2237532 Google Scholar

7. Pan, Y. M., K.W. Leung and K. Lu, "Omnidirectional linearly and circularly polarized rectangular dielectric resonator antennas," IEEE Trans. Antennas Propag., Vol. 60, No. 2, 751-759, Feb. 2012.
doi:10.1109/TAP.2011.2173122 Google Scholar

8. Pan, Y. M. and K. W. Leung, "Wideband omnidirectional circularly polarized dielectric resonator antenna with parasitic strips," IEEE Trans. Antennas Propag., Vol. 60, No. 6, 2992-2997, Jun. 2012.
doi:10.1109/TAP.2012.2194678 Google Scholar

9. Khalily, M., M. R. Kamarudin, M. Mokayef, and M. H. Jamaluddin, "Omnidirectional circularly polarized dielectric resonator antenna for 5.2-GHz WLAN applications," IEEE Antennas Wireless Propag. Lett., Vol. 13, 443-446, 2014.
doi:10.1109/LAWP.2014.2309657 Google Scholar

10. Pan, Y. M., S. Y. Zheng, and B. J. Hu, "Wideband and low-profile omnidirectional circularly polarized patch antenna," IEEE Trans. Antennas Propag., Vol. 62, No. 8, 4347-4351, Aug. 2014.
doi:10.1109/TAP.2014.2323412 Google Scholar

11. Yu, D., S. X. Gong, Y. T. Wan, Y. L. Yao, Y. X. Xu, and F. W. Wang, "Wideband omnidirectional circularly polarized patch antenna based on vortex slots and shorting vias," IEEE Trans. Antennas Propag., Vol. 62, No. 8, 3970-3977, Aug. 2014.
doi:10.1109/TAP.2014.2325961 Google Scholar

12. Shi, Y. Z. and J. H. Liu, "Wideband and low-profile omnidirectional circularly polarized antenna with slits and shorting-vias," IEEE Antennas Wireless Propag. Lett., Vol. 15, 686-689, 2016.
doi:10.1109/LAWP.2015.2469277 Google Scholar

13. Cai, Y. M., S. Gao, Y. Z. Yin, W. T. Li, and Q. Luo, "Compact-size low-profile wideband circularly polarized omnidirectional patch antenna with reconfigurable polarizations," IEEE Trans. Antennas Propag., Vol. 64, No. 5, 2016-2021, May 2016.
doi:10.1109/TAP.2016.2535502 Google Scholar

14. Narbudowicz, A., X. L. Bao, and M. J. Ammann, "Dual-band omnidirectional circularly polarized antenna," IEEE Trans. Antennas Propag., Vol. 61, No. 1, 77-83, Jan. 2013.
doi:10.1109/TAP.2012.2214992 Google Scholar

15. Park, B. C. and J. H. Lee, "Dual-band omnidirectional circularly polarized antenna using zeroth- and first-order modes," IEEE Antennas Wireless Propag. Lett., Vol. 11, 407-410, 2012.
doi:10.1109/LAWP.2012.2193550 Google Scholar

16. Pan, Y. M., S. Y. Zheng, and W. W. Li, "Dual-band and dual-sense omnidirectional circularly polarized antenna," IEEE Antennas Wireless Propag. Lett., Vol. 13, 706-709, 2014. Google Scholar

17. Yu, D., S. X. Gong, Y. T. Wan, and W. F. Chen, "Omnidirectional dual-band dual circularly polarized microstrip antenna using TM₀₁ and TM₀₂ modes," IEEE Antennas Wireless Propag. Lett., Vol. 13, 1104-1107, 2014. Google Scholar

18. Jecko, B. and C. Decroze, "The `monopolar wire patch antenna’ concept," Proc. 2nd Eur. Conf. Antennas and Propagation (EuCAP), 2007. Google Scholar

19. Garg, R., P. Bhartia, I. Bahl, and A. Ittipiboon, Microstrip Antenna Design Handbook, Ch. 5, 320, Artech House, Norwood, MA, 2001.

Dr. Hong-Yin Zhang

Dr. Fu-Shun Zhang

Dr. Can Wang

Dr. Tian Li