Tri-Band Dual-Polarized Shared-Aperture Antenna Arrays with Wide-Angle Scanning and Low Profile for 5G Base Stations

Ying Sun, Jin Zhang, Peng Mei, Shengyuan Luo, Wen Fu, Shuai Zhang*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

A novel tri-band shared aperture antenna (TSAA) array is proposed in this paper to meet the requirements of modern base station antennas for multi-band antenna fusion and independent control. Different antenna types are utilized for each operating band, including 3D-printed dielectric resonator antennas (DRAs) for the middle bands (MB, 3.4 to 3.6 GHz) and high bands (HB, 5.4 to 5.6 GHz), and dipole antennas for
the low band (LB, 1.85 to 2.15 GHz). The TSAA comprises a 1x4 dipole antenna array for LB, a 2x7 MB antenna array located at the edges of the aperture, and a 2x12 HB antenna array at the aperture center. The LB dipole antenna array is positioned above the MB and HB antenna arrays, providing wideband electromagnetic transparency for both MB and HB simultaneously. By exploiting the high dielectric permittivity of
the DRAs, the overall array profile is miniaturized to 0.13 𝜆0 (𝜆0 is the free-space wavelength at central frequency of LB), while the array element spacing meets scanning conditions for suppressing grating lobes and achieving wide-angle control of each frequency band. Additionally, the adoption of symmetric 𝜂-shaped stripline coupled feeding technology in the LB antenna effectively improves the problem of tilted radiation patterns of the HB antenna.
Original languageEnglish
JournalI E E E Transactions on Antennas and Propagation
ISSN0018-926X
Publication statusAccepted/In press - Jan 2024

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