A Low Profile Broadband Dual-Polarized Base Station Antenna Using Folded Dipole Radiation Element

Chen, Wei; Lin, Hai; Ding, Hui; Liu, Yang; Chisala, Michael; Shen, Zhaoyang; He, Zhibin; Liao, Baihui; Wang, Rui

doi:10.1109/access.2019.2918303

Cited by 15 publications

(6 citation statements)

References 18 publications

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“…A number of broadband dual-polarized dipole antennas have been developed for 2G/3G/4G systems operating in the band 1.71 -2.69 GHz [4]- [10]. The broadband performance can be achieved by many methods, such as making slots on the radiating patch [4], [5], adding parasitic elements [5], [6], using shared-dipole structure [7], [8], or applying better feeding methods [9], [10]. In fact, multiband antennas could perform better than wideband antennas due to in-band interference for such applications.…”

Section: Introductionmentioning

confidence: 99%

A Novel Compact Quadruple-Band Indoor Base Station Antenna for 2G/3G/4G/5G Systems

et al. 2019

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This paper presents a quadruple-band indoor base station antenna for 2G/3G/4G/5G mobile communications, which covers multiple frequency bands of 0.8-0.96 GHz, 1.7-2.7 GHz, 3.3-3.8 GHz and 4.8-5.8 GHz and has a compact size with its overall dimensions of 204 × 175 × 39 mm 3. The lower frequency bands over 0.8-0.96 GHz and 1.7-2.7 GHz are achieved through the combination of an asymmetrical dipole antenna and parasitic patches. A stepped-impedance feeding structure is used to improve the impedance matching of the dipole antenna over these two frequency bands. Meanwhile, the feeding structure also introduces an extra resonant frequency band of 3.3-3.8 GHz. By adding an additional small T-shaped patch, the higher resonant frequency band at 5 GHz is obtained. The parallel surrogate model-assisted hybrid differential evolution for antenna optimization (PSADEA) is employed to optimize the overall quadruple-band performance. We have fabricated and tested the final optimized antenna whose average gain is about 5.4 dBi at 0.8-0.96 GHz, 8.1 dBi at 1.7-2.7 GHz, 8.5 dBi at 3.3-3.8 GHz and 8.1 dBi at 4.8-5.0 GHz respectively. The proposed antenna has high efficiency and is of low cost and low profile, which makes it an excellent candidate for 2G/3G/4G/5G base station antenna systems. INDEX TERMS 2G/3G/4G/5G, base station antenna, compact antennas, optimization method, quadrupleband antennas.

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Section: Introductionmentioning

confidence: 99%

A Novel Compact Quadruple-Band Indoor Base Station Antenna for 2G/3G/4G/5G Systems

et al. 2019

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“…For application, a compact high-gain base station array is fabricated, which composes of the proposed antennas and HB elements whose radiation performance are similar to the HB elements reported in [23], detail of the array is shown in gain of 18±1 dBi. Therefore, a compact high-gain base station array with good performance is fabricated and measured.…”

Section: Resultsmentioning

confidence: 83%

A Compact Wideband Dual-Polarized Base Station Antenna Using Asymmetric Dipole

Lin

Fangshun³

et al. 2022

IEEE Open J. Antennas Propag.

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A compact wideband dual-polarized antenna for base station application is proposed. The antenna element consists of a main radiator, two baluns, and a reflector. Two methods are used to enhance bandwidth and improve the port-to-port isolation. Firstly, by integrating the parasitic elements to traditional dipoles, new resonant modes are introduced to realize broadband, which can be controlled flexibly. Subsequently, part of the parasitic elements is removed to form asymmetric dipoles. Due to the asymmetry construction of the design, the polarization isolation of the antenna achieves more than 30 dB in the whole working band with stable radiation patterns. In addition, the specially designed parasitic elements achieve enhanced bandwidth without increasing the size of the radiator. The Simulation and measurement results show that the antenna has an impedance bandwidth of 32.7% (690-960 MHz). Moreover, a stable half-power beamwidth (HPBW) of 68°±5°and a high gain of 8.5±0.3 dBi is achieved. To verify the performance of the antenna, a compact high-gain base station array was designed and manufactured. The good performance of the proposed antenna makes it a promising candidate for 4G/5G base station application.

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“…Besides these feeding ports, twenty two-way power dividers and four five-way phase shifters are employed together as feeding networks in the array to feed those antenna elements and realize an electrical down-tilt of the radiation beam. For one polarization of each subarray, as shown in Figure 12(b), one five-way phase shifter is used with its five outputs connected to five two-way power dividers; each power divider is connected to two adjacent antenna elements sharing the same polarization direction [12], [15]. The spacing between two adjacent antenna elements in a subarray is 130 mm (approximately 0.95 λ at 2.2 GHz), which is selected deliberatively to obtain a high gain with the use of a limited quantity of antenna elements but free from significant appearance of grating lobes.…”

Section: A Geometry Of Antenna Arraymentioning

confidence: 99%

A Miniaturized Wideband Dual-Polarized Antenna Based on Mode-Control Principle for Base-Station Applications

2020

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In this paper, a miniaturized wideband dual-polarized antenna and its array are proposed and demonstrated for practical base-station applications. ''Mode-control'' principle is employed to facilitate both miniaturization and bandwidth-enhancement of the proposed antenna element. To be more specific, by inserting meander lines into a traditional crossed loop-dipole antenna, its first resonant mode can be shifted to a lower frequency without increasing the aperture size, implying that a total size reduction can be achieved. Meanwhile, by embedding a pair of crossed straight strips into the coupling region of the crossed loop-dipole antenna, its second resonant mode can be moved to a higher frequency with a good impedance matching, thereby improving the impedance bandwidth significantly. A prototype of the proposed antenna with a small radiator size of only 0.33λ × 0.33λ (λ is the wavelength at the center frequency of 2.2 GHz) is designed, fabricated and measured. Measurements show that in the target frequency band from 1.71 GHz to 2.69 GHz, i.e., 2G/3G/4G bands, a relatively good impedance matching with the VSWR of less than 1.65 and a high isolation of greater than 28 dB are obtained by the proposed antenna element. Also, a stable gain of 8.7±0.5 dBi and a stable 3-dB beamwidth of 64.8±2.7 • at the H-plane are respectively achieved. A multipleinput-multiple-output (MIMO) antenna array consisting of two subarrays with electrical down-tilt is further developed for practical base-station applications. Each subarray is composed of ten antenna elements. The overall width of the array is only 260 mm, which is much narrower than that of typical industrial products (∼305 mm). Measured results show that the antenna array has also achieved good performances such as wide impedance bandwidth, high isolations among different ports, and stable radiations over the 2G/3G/4G bands.

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A Low Profile Broadband Dual-Polarized Base Station Antenna Using Folded Dipole Radiation Element

Cited by 15 publications

References 18 publications

A Novel Compact Quadruple-Band Indoor Base Station Antenna for 2G/3G/4G/5G Systems

A Novel Compact Quadruple-Band Indoor Base Station Antenna for 2G/3G/4G/5G Systems

A Compact Wideband Dual-Polarized Base Station Antenna Using Asymmetric Dipole

A Miniaturized Wideband Dual-Polarized Antenna Based on Mode-Control Principle for Base-Station Applications

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