High gain and slant dual-polarized antenna for private 5G railway base stations
Year: 2026
Type: article
Abstract: This paper proposes a novel antenna structure that simultaneously satisfies high gain, dual-polarization, and fan-beam radiation pattern characteristics for Private 5G base stations in next-generation railway communications. In Private 5G railway communications, a balance of high gain, dual-polarization, and fan-beam is crucial. High gain and fan-beam pattern maximize coverage along the track, while dual-polarization provides link robustness for high-speed mobility. The proposed antenna element achieves a high gain of 12.8 dBi and stable radiation performance despite its relatively compact size by employing a radiation mechanism based on a higher-order mode patch antenna and a sidelobe suppression technique utilizing central and side slots. Furthermore, by rotating the antenna by 45[Formula: see text] and configuring it in a slant dual-polarization structure, it provides robustness against polarization variations that frequently occur in practical communication environments. A 6 × 1 array antenna constructed based on the proposed antenna element forms a stable fan-beam radiation pattern with suppressed grating lobes even at wide array spacing of 1.27[Formula: see text], providing a horizontal half-power beamwidth (HPBW) of 6[Formula: see text], a vertical HPBW of 38[Formula: see text], and a peak gain of 18.6 dBi. The 6-way power divider designed for dual-polarization array feeding ensures excellent uniform power distribution with an insertion loss deviation within ± 0.32 dB and an insertion phase deviation within ± 2.8[Formula: see text]. Both the proposed antenna element and the array antenna achieve sufficient bandwidth coverage for the Private 5G band, demonstrating performance suitable for application in practical base station environments. Moreover, a figure-of-merit comparison defined based on peak gain, fractional bandwidth, and antenna size confirms that the proposed antenna achieves the most balanced performance compared to previously reported high gain dual-polarized antennas. These results indicate that the proposed antenna can provide high reliability for next-generation Private 5G railway base stations and offer significant advantages in terms of coverage, interference mitigation, and link robustness in practical railway operating environments.
Source: Scientific Reports
Authors: Jae-Geun Lee, Youjin Han, Byung Kuon Ahn
Institution: Soongsil University
Language: English
Topic: Antenna Design and Analysis
Subfield: Aerospace Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,690
OpenAlex ID: W7140473377