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A low profile dual-band dual-polarized filtering antenna with no extra circuit

Liu, Xuekang, Sanz-Izquierdo, Benito, Gao, Steven (2024) A low profile dual-band dual-polarized filtering antenna with no extra circuit. In: 2024 18th European Conference on Antennas and Propagation (EuCAP). 2024 18th European Conference on Antennas and Propagation. . IEEE ISBN 979-8-3503-9443-6. E-ISBN 978-88-31299-09-1. (doi:10.23919/eucap60739.2024.10501607) (KAR id:105857)

Abstract

This research introduces an innovative, compact dual-band dual-polarized antenna equipped with filtering capabilities for 5G sub-6GHz base stations. Using the concept of multipath coupling, two controllable radiation nulls are achieved independently. The antenna's impedance bandwidth is widened by skillfully exciting the anti-phase TM22 mode and shifting it to a lower frequency band while preserving other resonant modes. Additionally, incorporating four shorted strips around the radiator effectively increases the average half power beamwidth in the higher frequency band from 51∘ to 61∘ . Finally, the integration of two wide-band planar baluns, linked to the input terminals of the differentially fed antenna, results in the creation of this dual-polarized filtering antenna with dual operating frequency bands. Experimental prototypes of the antenna element and 1 × 4 array were fabricated and tested. The reflection coefficients demonstrate the antenna's functionality across the 3.24-3.90 GHz (18.5 % ) and 4.74-5.06 GHz (6.5 % ) frequency bands, maintaining |S11|<−14 dB . Additionally, a high isolation level of 31 dB was measured from the input ports.

Item Type: Conference or workshop item (Paper)
DOI/Identification number: 10.23919/eucap60739.2024.10501607
Additional information: For the purpose of open access, the author(s) has applied a Creative Commons Attribution (CC BY) licence (where permitted by UKRI, ‘Open Government Licence’ or ‘Creative Commons Attribution No-derivatives (CC BY-ND) licence’ may be stated instead) to any Author Accepted Manuscript version arising.
Uncontrolled keywords: base station array; dual-polarization; filtering antenna; dual-band array
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts
Funders: Huawei Technologies (United Kingdom) (https://ror.org/056gzgs71)
Engineering and Physical Sciences Research Council (https://ror.org/0439y7842)
SWORD Depositor: JISC Publications Router
Depositing User: JISC Publications Router
Date Deposited: 23 May 2024 08:46 UTC
Last Modified: 28 May 2024 13:23 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/105857 (The current URI for this page, for reference purposes)

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