K. V. Kobrin¹, Zimeng Li², V. A. Sledkov³, M. B. Manuilov4

1, 4 Southern Federal University (Rostov-on-Don, Russia)

2, 3 Guangzhou Compass Technology Co., Ltd. (China)

A novel design of dual-polarized planar crossed dipoles antennas for base stations of 5G mobile communication systems operating within frequency band 3,3–5,9 GHz has been proposed. Each of crossed dipoles is excited with the microstrip line which is fed with the standard 50-Ohm coaxial line. Key feature of suggested solution consists in the synthesis of the dipole profile on the base of Bezier curves of the third order. The use of Bezier curves provides the increased number of degrees of freedom during the optimization of the dipole profile and ensures the fine tuning of the mutual coupling between the crossed dipoles. This approach to the synthesis of dipole profiles let us extend the operational frequency band of antenna in comparison of the known prototypes.

A novel crossed dipole antenna for operational band 3,3–5,9 GHz has been synthesized on the base of this approach which includes single layer printed board excited with the coaxial lines and reflector. The characteristics of novel modification of a single planar dipole antenna as well as a 8-element antenna array have been studied in detail. Over operational band 3,3–5,9 GHz (57%) the reflection coefficient for ports of antenna array is equal to –15 dB, isolation of ports is about –28…–30 dB, the beam width for the level –10 dB is equal to 120°–4°/+10°. The cross polarization component is less than –19 dB. The operational frequency band might be extended by means of further optimization of the dipole profile. The obtained characteristics of antenna including bandwidth might be improved by introducing the additional passive elements into the antenna design.

Kobrin K.V., Zimeng Li, Sledkov V.A., Manuilov M.B. Dual polarized antenna array of planar dipoles for mobile communication base stations of 3,3–5,9 GHz band. Antennas. 2021. № 3. P. 50–58. DOI: https://doi.org/10.18127/j03209601-202103-07 (in Russian) 

1. Westberg E., Staudinger J., Annes J., Shilimkar V. 5G infrastructure RF solutions. IEEE Microwave Magazine. 2019. V. 20. P. 51–58.
2. Cui Y.H., Li R.L., Fu H.Z. A broadband dual-polarized planar antenna for 2G/3G/LTE base stations. IEEE Transactions on Antennas and Propagation. 2014. V. 62. № 9. P. 4836–4840.
3. Liu Y., Yi H., Wang F.W., Gong S.X. A novel miniaturized broadband dual-polarized dipole antenna for base station. IEEE Antennas and Wireless Propagation Letters. 2013. V. 12. P. 1335–1338.
4. Luo Y., Chu Q.X. Oriental crown-shaped differentially fed dual polarized multi-dipole antenna. IEEE Transactions on Antennas and Propagation. 2015. V. 63. № 11. P. 4678–4685.
5. Li Y., Liang X., Bai X., Liu L., Geng J., Jin R. An ultra-wideband cross-dipole antenna with wide beam for dual-polarization applications. IEEE International Symposium on Antennas and Propagation. 2015. P. 2027–2028.
6. Perruisseau-Carrier J., Hee T.W., Hall P.S. Dual-polarized broadband dipole. IEEE Antennas and Wireless Propagation Letters. 2003. V. 2. № 1. P. 310–312.
7. Computer aided geometric design. Ed. by R.E. Barnhill and R.F. Riesenfeld. Academic Press. 1974.
8. Bartels R.H., Beatty J.C., Barsky B.A. An introduction to splines for use in computer graphics and geometric modelling. San Francisco: Morgan Kaufmann. 1998.
9. Rodzhers D., Adams Dzh. Matematicheskie osnovy mashinnoj grafiki. M.: Mir. 2001. (in Russian)
10. Ansys HFSS [Elektronnyj resurs]. URL: https://www.ansys.com.