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Wideband Dual-Polarized Filtering Antenna for Base Station Applications

Liu, Xuekang, Sanz-Izquierdo, Benito, Gao, Steven, Wen, Lehu, Yang, Xue-Xia (2024) Wideband Dual-Polarized Filtering Antenna for Base Station Applications. IEEE Antennas and Wireless Propagation Letters, . ISSN 1536-1225. (doi:10.1109/LAWP.2024.3364401) (KAR id:105017)


A compact wideband dual-polarized filtering antenna based on tightly coupled cross dipoles is presented in this letter. The enhancement of impedance bandwidth is realized by introducing four impedance equalizers to equalize the input resistances of the two inherent resonant modes of tightly coupled cross dipole antenna. The enhancement of the selectivity is realized by introducing two radiation nulls in 5G sub-6 GHz n77 and n79 bands. The radiation null in n77 band is obtained by introducing the cross strips in the center of the antenna. The radiation null in the n79 band is achieved by the introduction of open-end branches. The manipulation of their key parameters allows for independent control over both radiation nulls. The validity of the antenna's design principle was confirmed by carrying out fabrication and measurements. The results obtained showcase the antenna's broad fractional bandwidth of 63.4% and exceptional port isolation of 31 dB. High out-of-band rejection levels in n77 and n79 bands are also obtained. In addition, since the whole radiator of the presented antenna is coplanar, it offers the advantage of a simple structure and convenient manufacturing, making it highly suitable for the use in base stations operating across multiple bands.

Item Type: Article
DOI/Identification number: 10.1109/LAWP.2024.3364401
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 15:18 UTC
Last Modified: 19 Feb 2024 11:58 UTC
Resource URI: (The current URI for this page, for reference purposes)

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