A broadband dual‐polarized antenna with chamfers

Wu, Rui; Chu, Qing‐Xin

doi:10.1002/mop.30358

Cited by 18 publications

(20 citation statements)

References 9 publications

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“…Interestingly, the work in [18] that makes use of bow-tie dipoles also share such specific mode-control behaviors and mechanisms as [21]. The crossed chamfered loop-dipole antenna in [23], [29], contrastively, is able to provide a second mode that can be independently controlled to a higher frequency so as to enhance the impedance bandwidth. This is because only the length of the coupling region is shortened without influencing the driven dipole's current path when resizing the chamfer.…”

Section: B Working Principlementioning

confidence: 99%

“…It is concluded from the above analysis that for such a class of crossed dipole antennas, if an independently controllable first mode is required, the current path of the driven dipole should be altered but remaining the dimensions of the coupling region unchanged, just like the works [18], [21] do. Meanwhile, if an independently controllable second mode is needed, the coupling region dimensions should be modified while the current path of the driven dipole should be kept constant, which is similar as [23], [29].…”

Section: B Working Principlementioning

confidence: 99%

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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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Section: B Working Principlementioning

confidence: 99%

Section: B Working Principlementioning

confidence: 99%

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

2020

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“…Unfortunately, the isolation was about 25 dB. By using a loop dipole with chamfers as radiator in [19], the antenna had a wideband (1.7-2.8 GHz, 48.8%) for S 11 < −15 dB and high XPD. A multi-mode loop dipole with two resonators covered the band from 1.69 GHz to 3.6 GHz (72.2%) for VSWR < 2 was proposed in [20].…”

Section: Introductionmentioning

confidence: 99%

Broadband Dual-Polarized Loop Cross-Dipole Antenna for 5G Base Station Applications

et al. 2020

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A broadband dual-polarized base station antenna is proposed in this paper. The antenna consists of loop cross-dipoles, Y-shaped coupling feeding lines, and a metal box reflector. An equivalent circuit model including a signal flow diagram is established to analyze the mechanism of the proposed antenna in detail. Moreover, the Y-shaped coupling feeding lines are introduced to control the coupling with the antenna to achieve broadband and good impedance matching. The prototype of the antenna is fabricated and measured. The measured results show that the antenna with simple structures can operate at the band of 3.2–5.22 GHz (48%) with high port-to-port isolation (35 dB) and stable gain (9 ± 1 dBi). The measured results show good agreement with simulated results, especially in cross-polarization discrimination ratio (>27 dB) and the half power beam width (61° ± 3° at the E-plane, 68° ± 3° at the H-plane). In summary, the proposed antenna could be a good candidate for 5G sub-6 GHz base station applications.

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“…With the significant development of wireless communication systems, dual-polarized antennas are widely used in base stations to reduce the effects of multipath fading and increase signal reliability [1][2][3][4]. Dual-polarized antennas have aroused considerable attention in recent years [5][6][7][8][9][10][11]. With the rapid development of long-term evolution (LTE), the 700 MHz band has become one of the international mainstreams for LTE.…”

Section: Introductionmentioning

confidence: 99%

Broadband multimode antenna and its array for wireless communication base stations

Chu

2019

ETRI Journal

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A wideband dual‐polarized antenna coupling cross resonator is proposed for LTE700/GSM850/GSM900 base stations. An additional resonance is introduced to obtain strong coupling between the dipole and resonator. Moreover, the input impedance of the proposed antenna is steadily close to 50 Ω, which results in better impedance matching. Therefore, a wide bandwidth can be achieved with multiresonance. A prototype is fabricated to verify the proposed design. The measured results show that the antenna has a fractional bandwidth of 35.7% from 690 MHz to 990 MHz for |S11| < −15 dB. Stable radiation patterns as well as gain are also obtained over the entire operating band. Moreover, a five‐element antenna array with an electrical downtilt of 0° to 14° is developed for modern base station applications. Measurement shows that a wide impedance bandwidth of 34.7% (690 MHz to 980 MHz), stable HPBW (3‐dB beamwidth) of 65 ± 5°, and high gain of 13.8 ± 0.6 dBi are achieved with electrical downtilts of 0°, 7°, and 14°.

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A broadband dual‐polarized antenna with chamfers

Cited by 18 publications

References 9 publications

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

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

Broadband Dual-Polarized Loop Cross-Dipole Antenna for 5G Base Station Applications

Broadband multimode antenna and its array for wireless communication base stations

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