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Wideband Dual-Polarized Antenna with High Selectivity for 5G Sub-6GHz Base Station Applications

Liu, Xuekang, Sanz-Izquierdo, Benito, Gao, Steven, Zhang, Haiwei, Hu, Wei, Yang, Xue-Xia (2023) Wideband Dual-Polarized Antenna with High Selectivity for 5G Sub-6GHz Base Station Applications. IEEE Transactions on Antennas and Propagation, 72 (1). pp. 962-967. ISSN 0018-926X. (doi:10.1109/TAP.2023.3329700) (KAR id:105016)


A dual-polarized antenna with wide impedance bandwidth and high selectivity is presented for the use of 5G sub-6GHz base stations. By strategically introducing a novel coupled dual-mode grid structure, two additional resonant modes (One is in-band, another one is out-of-band) as well as two radiation nulls can be obtained to enhance the impedance bandwidth and out-of-band rejection level of the widely used tightly coupled cross-dipole antenna. The two radiation nulls introduced by the grid structure are located at the two edges of the desired frequency band. To further improve the gain suppression level in higher out-of-band, a new radiation null is obtained by symmetrically introducing four T-shaped strips. Apart from these additional radiation nulls, this antenna also exhibits two inherent radiation nulls originating from its feed structure and reflector. The measured results demonstrate that the proposed antenna exhibits a wide impedance bandwidth of 39.5% (ranging from 3.07 GHz to 4.58 GHz), excellent isolation of over 31 dB, and a notable out-of-band rejection level exceeding 17.6 dB and 19.2 dB in the frequency bands of 1.7 GHz-2.7 GHz and 4.8 GHz- 5.0 GHz.

Item Type: Article
DOI/Identification number: 10.1109/TAP.2023.3329700
Additional information: For the purpose of open access, the author has applied a CC BY public copyright licence to any Author Accepted Manuscript version arising from this submission.
Subjects: T Technology > TK Electrical engineering. Electronics. Nuclear engineering > TK5101 Telecommunications
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts
Funders: Engineering and Physical Sciences Research Council (
Depositing User: Xuekang Liu
Date Deposited: 16 Feb 2024 15:13 UTC
Last Modified: 19 Feb 2024 11:53 UTC
Resource URI: (The current URI for this page, for reference purposes)

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