A Wideband Tri-Band Shared-Aperture Antenna Array for 5G and 6G Applications
Shang-Yi Sun, Can Ding, Hai-Han Sun, Alessio Monti, Y. Jay Guo

TL;DR
This paper introduces a wideband tri-band shared-aperture antenna array designed for 5G and 6G applications, addressing scattering and coupling issues with innovative segmented spiral radiators and magnetoelectric dipole structures.
Contribution
It presents a novel segmented spiral radiator and a planar ME dipole design that collectively enable wideband tri-band operation with low coupling and scattering for advanced wireless systems.
Findings
Achieves over 128% RCS reduction from 4.7-21.5 GHz
Maintains better than 20 dB port isolation across all bands
Successfully covers 5G and 6G frequency ranges with stable radiation patterns
Abstract
This work presents a wideband tri-band shared-aperture antenna array covering the 5G mid-band and 6G centimetric band. The challenge of scattering and coupling suppression is holistically addressed across the wide bands. Guided by characteristic mode analysis (CMA), a segmented spiral radiator is developed to mitigate high-frequency scattering and coupling while maintaining low-frequency radiation performance. Compared with a conventional tube radiator, the proposed spiral achieves a reduced radar cross-section (RCS) over 4.7-21.5 GHz (128.2%). With the aid of serial resonators, the segmented-spiral dipole achieves impedance matching in the low band (LB, 3.05-4.68 GHz, 42.2%), covering the 5G band (3.3-4.2 GHz), while additional suppressors further reduce cross-band coupling. The middle band (MB) and high band (HB) antennas operate at 6.2-10.0 GHz (46.9%) and 10.0-15.6 GHz (43.8%),…
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Taxonomy
TopicsAntenna Design and Analysis · Advanced Antenna and Metasurface Technologies · Full-Duplex Wireless Communications
