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Differentially Fed Dual-Band Base Station Antenna with Multimode Resonance and High Selectivity for 5G Applications

Liu, Xuekang, Sanz-Izquierdo, Benito, Zhang, Haiwei, Gao, Steven, Hu, Wei, Yang, Xue-Xia, Sumantyo, Josaphat Tetuko Sri (2023) Differentially Fed Dual-Band Base Station Antenna with Multimode Resonance and High Selectivity for 5G Applications. IEEE Transactions on Antennas and Propagation, . ISSN 0018-926X. (doi:10.1109/TAP.2023.3322198) (KAR id:103317)


A dual-polarized antenna with multimode resonance and high selectivity is proposed in this paper to cover the 5G sub-6 GHz bands. The proposed antenna achieves dual wide impedance bandwidth characteristics by incorporating a dual mode coupled patch and four planar coupled strips around the driven patch. Through the four resonant modes of these structures, the antenna effectively covers the two desired frequency bands. Moreover, the electric/magnetic coupling between the driven patch, dual mode coupled patch, and planar coupled strips enables the creation of three radiation nulls that suppress unwanted radiation. To further improve the out-of-band rejection level and half power beamwidth, four shorted strips are introduced around the radiator. The introduction of these strips results in a 4th radiation null at higher out-of-band frequencies and expands the antenna's half power beamwidth from 52° to 62°. To demonstrate the feasibility of the design, both the proposed antenna and its array were manufactured and tested. Measured results show that the filtering element was able to operate within frequency bands of 3.24-3.83 GHz (16.7%) and 4.74-5.30 GHz (11.2%) with a reference of |Sdd11| < -14 dB. The input ports exhibited a high level of isolation, measuring 40 dB. Furthermore, the four radiation nulls proved effective in suppressing out-of-band radiation.

Item Type: Article
DOI/Identification number: 10.1109/TAP.2023.3322198
Additional information: For the purpose of open access, the author(s) has applied a Creative Commons Attribution (CC BY) licence to any Author Accepted Manuscript version arising.
Uncontrolled keywords: Base station array antenna, dual-band antenna, multimode resonance, high selectivity.
Subjects: T Technology
T Technology > TK Electrical engineering. Electronics. Nuclear engineering > TK5101 Telecommunications > TK5103.4 Broadband communication systems
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts
Funders: Engineering and Physical Sciences Research Council (
Huawei Technologies (United Kingdom) (
Depositing User: Benito Sanz Izquierdo
Date Deposited: 17 Oct 2023 15:51 UTC
Last Modified: 08 Feb 2024 14:53 UTC
Resource URI: (The current URI for this page, for reference purposes)

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