This paper proposes a new design of reconfigurable three-sector dual-mode dual-polarized antenna for use primarily in mobile communication base stations. The design offers the flexibility to be used as a sectorial (directive) or omnidirectional base station antenna whenever required. The two different radiating modes (omnidirectional and sectorial) depend only on the excitation scenario. The proposed antenna has the advantages of offering broadband, stable radiation pattern and high polarization purity within the desired frequency band, and a simple feeding structure with a remarkable compact size (less than 800 cm3) and low profile. The achieved fractional bandwidth is 55.3% (1.7-3 GHz). The antenna design principle is validated by constructing and testing a prototype with the two modes of operation. An eight-element linear array is then constructed and synthesized as a reconfigurable base station. Results demonstrate how the design may be packaged in a compact size to offer excellent omnidirectional or sectorial performance which makes this new design an ideal candidate for reconfigurable dual-mode mobile base stations.
2. Mao, X. P. and J. W. Mark, "On polarization diversity in mobile communications," 2006 International Conference on Communication Technology, 1-4, Guilin, 2006.
3. Chu, Q. X., Y. Luo, and D. L. Wen, "Three principles of designing base-station antennas," International Symposium on Antennas and Propagation (ISAP), 1-3, Hobart, TAS, 2015.
4. Ding, C., H. Sun, R. W. Ziolkowski, and Y. J. Guo, "Simplified tightly-coupled cross-dipole arrangement for base station applications," IEEE Access, Vol. 5, 27491-27503, 2017.
5. He, Y., Z. Pan, X. Cheng, Y. He, J. Qiao, and M. M. Tentzeris, "A novel dual-band, dual-polarized, miniaturized, and low-profile base station antenna," IEEE Transactions on Antennas and Propagation, Vol. 63, No. 12, 5399-5408, Dec. 2015.
6. Seo, I., et al., "Design of dual polarized antenna for DCS, UMTS, WiBro base stations," IEEE International Conference on Wireless Information Technology and Systems, 1-4, HI, 2010.
7. Fhafhiem, N., P. Krachodnok, and R. Wangsan, "Design of a dual polarized resonator antenna for mobile communication system," International Journal of Electrical, Computer, Energetic and Communication Engineering, Vol. 8, No. 7, 2014.
8. Jung, Y. and S. Eom, "A compact multiband and dual-polarized mobile base-station antenna using optimal array structure," International Journal of Antenna and Propagation, Vol. 2015, 11, 2015.
9. Luo, Y., Q. X. Chu, and D. L. Wen, "A plus/minus 45 degree dual-polarized base-station antenna with enhanced cross-polarization discrimination via addition of four parasitic elements placed in a square contour," IEEE Transactions on Antennas and Propagation, Vol. 64, No. 4, 1514-1519, Apr. 2016.
10. Kaddour, A., S. Bories, A. Bellion, and C. Delaveaud, "3D printed compact dual-polarized wideband antenna," 11th European Conference on Antenna and Propagation (EUCAP), 3452-3454, 2017.
11. Cui, Y. and R. Li, "Analysis and design of a broadband dual-polarized planar antenna for 2G/3G/4G base station," 11th European Conference on Antenna and Propagation, 2152-2156, 2017.
12. Huang, D. H. and Q. X. Chu, "Broadband dual-polarized oval-shaped antenna for base-station applications," 2016 IEEE International Symposium on Antennas and Propagation (APSURSI), 1859-1860, Fajardo, 2016.
13. Gou, Y., S. Yang, J. Li, and Z. Nie, "A compact dual-polarized printed dipole antenna with high isolation for wideband base station applications," IEEE Transactions on Antennas and Propagation, Vol. 62, No. 8, 4392-4395, Aug. 2014.
14. Huang, H., Y. Liu, and S. Gong, "A broadband dual-polarized base station antenna with sturdy construction," IEEE Antennas and Wireless Propagation Letters, Vol. 16, 665-668, 2017.
15. Zheng, D. Z. and Q. X. Chu, "A multimode wideband ±45◦ dual-polarized antenna with embedded loops," IEEE Antennas and Wireless Propagation Letters, Vol. 16, 633-636, 2017.
16. Zheng, D. Z. and Q. X. Chu, "A wideband dual-polarized antenna with two independently controllable resonant modes and its array for base-station applications," IEEE Antennas and Wireless Propagation Letters, Vol. PP, No. 99, 1-1, 2017.
17. Chu, Q. X., D. L. Wen, and Y. Luo, "A broadband ±45◦ dual-polarized antenna with Y-shaped feeding lines," IEEE Transactions on Antennas and Propagation, Vol. 63, No. 2, 483-490, Feb. 2015.
18. Ando, A., A. Kondo, and S. Kubota, "A study of radio zone length of dual-polarized omnidirectional antennas mounted on rooftop for personal handy-phone system," IEEE Transactions on Vehicular Technology, Vol. 57, No. 1, 2-10, Jan. 2008.
19. Li, Y., Z. J. Zhang, J. F. Zheng, and Z. H. Zheng, "Compact azimuthal omnidirectional dual-polarized antenna using highly isolated collocated slots," IEEE Transactions on Antennas and Propagation, Vol. 60, No. 9, 4037-4045, 2012.
20. Quan, X., R. Li, Y. Fan, and D. E. Anagnostou, "Analysis and design of a 45◦ slant-polarized omnidirectional antenna," IEEE Transactions on Antennas and Propagation, Vol. 62, No. 1, 86-93, Jan. 2014.
21. 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.
22. Yu, Y., J. Xiong, and R. Wang, "A wideband omnidirectional antenna array with low gain variation," IEEE Antennas and Wireless Propagation Letters, Vol. 15, 386-389, Dec. 2016.
23. Jolani, F., Y. Yu, and Z. Chen, "A novel broadband omnidirectional dual-polarized MIMO antenna for 4G LTE applications," 2014 IEEE International Wireless Symposium, 1-4, Xi’an, 2014.
24. Wu, J., S. Yang, Y. Chen, S. Qu, and Z. Nie, "A low profile dual-polarized wideband omnidirectional antenna based on AMC reflector," IEEE Transactions on Antennas and Propagation, Vol. 65, No. 1, 368-374, Jan. 2017.
25. Alieldin, A. and Y. Huang, "Design of broadband dual-polarized oval-shaped base station antennas for mobile systems," 2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, 183-184, San Diego, CA, USA, 2017.
26. Balanis, C. A., Antenna Theory: Analysis and Design, 3rd Ed., Wiley, USA, 2005.