volume | PIER Journals

Abstract

A low-profile broadband omnidirectional MIMO antenna with dual-polarization is proposed for 4G LTE applications. It consists of two orthogonally polarized radiating elements with separate ports. The horizontally polarized element consists of four printed arc dipoles, a broadband balun feeding network, four arc parasitical strips and four double L-shaped parasitical strips. It exhibits a 48.9% fractional bandwidth (return loss > 10 dB) from 1.70 GHz to 2.80 GHz with a cross-sectional size less than 100×100 mm². The vertically polarized element consists of a discone, a round sleeve, and a top-loading ring shorted to the ground-plane with three equally-spaced pins. It provides a 47.3% fractional bandwidth (return loss > 10 dB) from 1.68 to 2.72 GHz with an overall volume less than 84×84×22 mm³. In addition, an isolation of 25 dB is achieved in the overlapping band of two elements and the cross-polarization levels for both radiating elements are lower than 20 dB.

1. Gao, F., W. Zhu, J. He, and X. Liu, "The dual polarized ceiling-mounted MIMO antenna analysis and its implementation," Green Communications and Networks, Vol. 113, 1087-1092, 2012.
doi:10.1007/978-94-007-2169-2_128

2. Ahn, C. H., S. W. Oh, and K. Chang, "A dual-frequency omnidirectional antenna for polarization diversity of MIMO and wireless communication applications," IEEE Antennas Wireless Propag. Lett., Vol. 8, 966-970, 2009.
doi:10.1109/LAWP.2009.2030135

3. Li, Y., Z. Zhang, J. Zheng, and Z. Feng, "Compact azimuthal omnidirectional dual-polarized antenna using highly isolated colocated slots," IEEE Transactions on Antennas Propagation, Vol. 60, No. 9, 4037-4045, Sep. 2012.
doi:10.1109/TAP.2012.2207072

4. Chen, J. Y., X. M. Zhang, X. W. Dai, C. B. Zhang, and C. Jiang, "A broadband dual-polarization ceiling-mounted antenna with a nesting structure," Proc. ISSSE, Vol. 2, 1-3, Sep. 2010.

5. Quan, X. L., R.-L. Li, J. Y. Wang, and Y. H. Cui, "Development of a broadband horizontally polarized omnidirectional planar antenna and its array for base stations," Progress In Electromagnetics Research, Vol. 128, 441-456, 2012.
doi:10.2528/PIER12042405

6. Qing, X. and Z. Chen, "Horizontally polarized omnidirectional segmented loop antenna," European Conference on Antennas and Propagation (EUCAP), 2904-2907, 2012.

7. Lin, C. C., L. C. Kuo, and H. R. Chuang, "A horizontally polarized omnidirectional printed antenna for WLAN applications," IEEE Transactions on Antennas Propagation, Vol. 54, No. 11, Part 2, 3551-3556, Nov. 2006.

8. Quan, X. L., R.-L. Li, J. Y. Wang, and Y. H. Cui, "Development of a broadband horizontally polarized omnidirectional planar antenna and its array for base stations," Progress In Electromagnetics Research, Vol. 128, 441-456, 2012.
doi:10.2528/PIER12042405

9. Wei, K., Z. Zhang, and Z. Feng, "Design of a wideband horizontally polarized omnidirectional printed loop antenna," IEEE Antennas Wireless Propag. Lett., Vol. 11, 49-52, 2012.

10. Aten, D. W. and R. L. Haut, "A wideband, low profile, shorted top hat monocone antenna," IEEE Transactions on Antennas Propagation, Vol. 60, 4485-4491, 2012.
doi:10.1109/TAP.2012.2207313

11. Jolani, F., Y. Yu, and Z. Chen, "A novel broadband omnidirectional dual polarized MIMO antenna for 4G LTE applications," IEEE International Wireless Symposium, 1-4, 2014.

12. Quan, X. and R. Li, "A broadband dual-polarized omnidirectional antenna for base stations," IEEE Transactions on Antennas and Propagation, Vol. 61, No. 2, 943-947, Feb. 2013.
doi:10.1109/TAP.2012.2223450

13. Dai, X.-W., Z.-Y. Wang, C.-H. Liang, X. Chen, and L.-T. Wang, "Multiband and dual-polarized omnidirectional antenna for 2G/3G/LTE application," IEEE Antennas and Wireless Propagation Letters, Vol. 12, 1492-1495, 2013.
doi:10.1109/LAWP.2013.2289743

Dr. Yiqiang Yu

Dr. Hongmei Zhang

Dr. Zhizhang Chen