A Tri-Band Shared-Aperture Base Station Antenna Array Covering 5G Mid-Band and 6G Centimetric Wave Band
Shang-Yi Sun, Hai-Han Sun, Can Ding, Y. Jay Guo

TL;DR
This paper introduces a tri-band shared-aperture antenna array designed for 5G and 6G bands, addressing interference suppression and maintaining high performance across wide frequency ranges for future base station applications.
Contribution
It presents a novel segmented spiral radiator with reduced RCS and a planar ME dipole structure for multi-band operation, improving interference mitigation and radiation consistency.
Findings
Achieved ultra-wide RCS reduction of 128.2% over 4.7-21.5 GHz.
Successfully covered 5G mid-band and 6G centimetric band with high isolation.
Maintained undistorted radiation patterns across all three bands.
Abstract
This work proposes a tri-band shared-aperture antenna array with three wide bands, covering the 5G mid-band and the 6G centimetric band, which is a promising candidate for future 6G base station antennas. The challenge of suppressing interferences, including scattering and coupling, in the tri-band array is holistically addressed across wide bands. Guided by characteristic mode analysis (CMA), a segmented spiral radiator is efficiently developed to mitigate scattering and coupling at high frequencies while preserving radiation performance at low frequencies. Compared to a conventional tube radiator, the proposed spiral exhibits a reduced radar cross-section (RCS) over an ultra-wide range of 4.7-21.5 GHz (128.2%). With the aid of serial resonators, impedance matching of the segmented-spiral-based dipole antenna is achieved across the low band (LB) of 3.05-4.68 GHz (42.2%), spanning the…
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Taxonomy
TopicsAntenna Design and Analysis · Advanced Antenna and Metasurface Technologies · Full-Duplex Wireless Communications
