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Abstract
This paper proposes a new design of a triple-band dual-polarized indoor base station antenna for mobile communication systems serving the 2G, 3G, 4G, and the new sub-6 GHz 5G applications. The design consists of two orthogonal dipole antennas to provide dual polarization. Each dipole consists of three different radiator types—elliptical dipole, bowtie dipole, and cat-ear shaped arms for different bands. The proposed antenna offers three broad bands with the fractional bandwidths of 31.3% (0.7–0.96 GHz), 55.3% (1.7–3 GHz), and 14% (3.3–3.8 GHz) which can be controlled independently. The design also offers stable radiation patterns within the desired frequency bands, high polarization purity and, a simple feeding structure with a compact size and low profile which make this new design an ideal candidate for indoor mobile base stations serving the 2G, 3G, 4G, and the new sub-6GHz 5G applications.
Highlights
As telecommunication vendors look to introduce 5G mobile communication systems from 2019, base station and mobile antennas need to evolve to fulfil the new sub-6 GHz 5G frequency bands in addition to the existing 2G, 3G and 4G bands (0.7-0.96 GHz and 1.7-2.7 GHz)
In 2017, the Chinese Ministry of Industry and Information Technology (MIIT) officially declared that 3.3-3.4, 3.4 -3.6 and 4.8-5 GHz bands are allocated for 5G services [1]
Base station antennas should maintain good impedance matching within the entire frequency bands of interest, a stable radiation pattern and a high polarization purity (PP) simultaneously [3]
Summary
As telecommunication vendors look to introduce 5G mobile communication systems from 2019, base station and mobile antennas need to evolve to fulfil the new sub-6 GHz 5G frequency bands in addition to the existing 2G, 3G and 4G bands (0.7-0.96 GHz and 1.7-2.7 GHz). Due to the introduction of 5G, single-polarized dual-band indoor base station antennas were reported to cover B2 and the new sub-6 GHz 5G frequency band from 3.3 to 3.8 GHz (B3). In [10], a single-polarized dual-band folded dipole antenna was designed to operate across 2.3-2.5 GHz and 3.1-4.2 GHz. In [11] and [12], single antennas were produced to cover most of the frequencies in B2 and B3 simultaneously, from 1.8 to 3.77 GHz in [11] and from 2.4 to 3.6 GHz in [12]. A. Alieldin et al.: Triple-Band Dual-Polarized Indoor Base Station Antenna for 2G, 3G, 4G, and Sub-6-GHz 5G Applications to cover B1, B2 and B3 simultaneously. This paper proposes a novel design of a dual-polarized triple-band antenna for 2G, 3G, 4G and, sub-6 GHz 5G indoor base stations covering the frequency bands from 0.7-0.96 GHz, 1.7-2.7 GHz and, 3.3-3.8 GHz simultaneously.
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