scholarly journals A Novel Miniaturized Dual Slant-Polarized UWB Antenna Array with Excellent Pattern Symmetry Property for MIMO Applications

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Zhi Zeng ◽  
Jianjun Huang ◽  
Zhaohui Song ◽  
Qinyu Zhang
Keyword(s):  
Antenna Array ◽  
Symmetry Property ◽  
Base Station ◽  
Antenna Element ◽  
Strip Line ◽  
Uwb Antenna ◽  
Power Splitter ◽  
Single Antenna ◽  
Two Parameters ◽  
Bow Tie

A novel miniaturized 1 × 10 uniform linear dual slant-polarized UWB antenna array for MIMO base station is presented. The antenna array operates in the frequency band from 1710 to 2690 MHz with a 17.3–18.7 dBi gain in a size of 105 × 1100 × 37 mm. The array element is composed of two single-polarized dipoles evolved from bow-tie antenna with slots on them, which miniaturize the size of the antenna. The 10 array elements are fed through an air dielectric strip-line power splitter. Two parameters, the beam tracking and the beam squint, are presented to quantitatively describe the pattern symmetry property of the antenna. The simulated and measured radiation performances are studied and compared. The results show that the pattern symmetry property of the single antenna element has been improved about 24% compared with the former study, and the antenna array also provides excellent pattern symmetry property.

scholarly journals Triangular Slot-Loaded Wideband Planar Rectangular Antenna Array for Millimeter-Wave 5G Applications

Electronics ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 778
Author(s):  
Iftikhar Ahmad ◽  
Houjun Sun ◽  
Umair Rafique ◽  
Zhang Yi
Keyword(s):  
Antenna Array ◽  
Millimeter Wave ◽  
Communication Systems ◽  
Ground Plane ◽  
Simulated Data ◽  
Impedance Bandwidth ◽  
Antenna Element ◽  
Single Antenna ◽  
Rectangular Patch ◽  
Half Power

This paper presents a design of a triangular slot-loaded planar rectangular antenna array for wideband millimeter-wave (mm-wave) 5G communication systems. The proposed array realizes an overall size of 35.5 × 14.85 mm2. To excite the array elements, a four-way broadband corporate feeding network was designed and analyzed. The proposed array offered a measured impedance bandwidth in two different frequency ranges, i.e., from 23 to 24.6 GHz and from 26 to 45 GHz. The single-antenna element of the array consists of a rectangular patch radiator with a triangular slot. The partial ground plane was used at the bottom side of the substrate to obtain a wide impedance bandwidth. The peak gain in the proposed array is ≈12 dBi with a radiation efficiency of >90%. Furthermore, the array gives a half-power beamwidth (HPBW) of as low as 12.5°. The proposed array has been fabricated and measured, and it has been observed that the measured results are in agreement with the simulated data.

scholarly journals A Wideband End-Fire Conformal Vivaldi Antenna Array Mounted on a Dielectric Cone

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Zengrui Li ◽  
Xiaole Kang ◽  
Jianxun Su ◽  
Qingxin Guo ◽  
Yaoqing (Lamar) Yang ◽  
...  
Keyword(s):  
Antenna Array ◽  
Antenna Element ◽  
Radiation Characteristics ◽  
Antenna Measurement ◽  
Radiation Beam ◽  
Conformal Antenna ◽  
Single Antenna ◽  
Measurement Results ◽  
Vivaldi Antenna ◽  
Good Agreement

The characteristics of a novel antipodal Vivaldi antenna array mounted on a dielectric cone are presented. By employing antipodal Vivaldi antenna element, the antenna array shows ultrawide bandwidth and end-fire radiation characteristics. Our simulations show that the cone curvature has an obvious influence on the performance of the conformal antenna, in terms of both the bandwidth and the radiation patterns. The thickness and permittivity of the dielectric cone have an effect on the bandwidth of the conformal antenna. Measurement results of both single antenna and conformal antenna array show a good agreement with the simulated results. The measured conformal antenna can achieve a −10 dBS11with bandwidth of 2.2–12 GHz and demonstrate a typical end-fire radiation beam. These findings provide useful guidelines and insights for the design of wideband end-fire antennas mounted on a dielectric cone.

SERIES FEED FAN-BEAM ANTENNA ARRAY WITH A LOW SIDELOBE LEVEL FOR POSITIONING SYSTEM

2020 ◽  
pp. 55-65
Author(s):  
Le Minh Thuy
Keyword(s):  
Antenna Array ◽  
Radiation Pattern ◽  
Amplitude Distribution ◽  
High Gain ◽  
Impedance Bandwidth ◽  
Antenna Element ◽  
Positioning System ◽  
Sidelobe Level ◽  
Single Antenna ◽  
Low Sidelobe

In this paper, a novel antenna array at 5GHz is presented with a low sidelobe level and wide impedance bandwidth for indoor positioning applications . The antenna array has the size of 450 ×57×0.8 mm3 with the high gain of 14.5dBi and the low SLL of -18 dB at 5GHz. The series feed using Unequal Split T-Junction is proposed with the Chebyshev-amplitude distribution to improve SLL. Besides the 1800 phase and amplitude distribution, by deploying driven elements above each single antenna element, the radiation pattern and the gain of the antenna aray are significantly improved.

scholarly journals A Quad-Port Dual-Band MIMO Antenna Array for 5G Smartphone Applications

Electronics ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 542 ◽  
Author(s):  
Jianlin Huang ◽  
Guiting Dong ◽  
Jing Cai ◽  
Han Li ◽  
Gui Liu
Keyword(s):  
Antenna Array ◽  
Dual Band ◽  
Antenna Element ◽  
Total Efficiency ◽  
Smartphone Applications ◽  
Mimo Antenna ◽  
Single Antenna ◽  
Fifth Generation ◽  
5 Ghz ◽  
Better Than

A quad-port antenna array operating in 3.5 GHz band (3.4–3.6 GHz) and 5 GHz band (4.8–5 GHz) for fifth-generation (5G) smartphone applications is presented in this paper. The single antenna element consists of an L-shaped strip, a parasitic rectangle strip, and a modified Z-shaped strip. To reserve space for 2G/3G/4G antennas, the quad-port antenna array is printed along the two long frames of the smartphone. The evolution design and the analysis of the optimal parameters of a single antenna element are derived to investigate the principle of the antenna. The prototype of the presented antenna is tested and the measured results agree well with the simulation. The measured total efficiency is better than 70% and the isolation is larger than 16.5 dB.

scholarly journals A Low-Profile and High-isolated MIMO Antenna for 5G Mobile Terminal

Micromachines ◽  
2020 ◽  
Vol 11 (4) ◽  
pp. 360 ◽  
Author(s):  
Rongqiang Li ◽  
Zixu Mo ◽  
Haoran Sun ◽  
Xiaofeng Sun ◽  
Guohong Du
Keyword(s):  
Antenna Array ◽  
Electromagnetic Coupling ◽  
Mobile Terminal ◽  
Loop Antenna ◽  
Impedance Bandwidth ◽  
Antenna Element ◽  
Strip Line ◽  
Total Size ◽  
Mimo Antenna ◽  
Low Profile

An eight-element multiple-input multiple-output (MIMO) frame antenna array in the 3.5 GHz band (3400–3600 MHz) for 5G mobile terminal systems was presented. By using the adjacent grounding and electromagnetic coupling feeding technology, the loop antenna element could generate two resonant frequencies, thus effectively expanding its bandwidth. By adopting double-sided parallel strip line (DSPSL) technology, the electromagnetic coupling inside the loop antenna could be adjusted, and the size of the loop antenna could be effectively reduced so that the MIMO antenna array could obtain a low-profile structure. The total size of the MIMO array was 150 mm × 75 mm × 5.3 mm. Without additional isolation measures, the measured −6 dB impedance bandwidth (BW) was 3400–3660 MHz, and the minimum isolation between antenna elements was better than −20 dB. The proposed antenna was expected to be applied to 5G mobile terminals based on its low-profile, high-isolated characteristics, and good MIMO performance.

scholarly journals Minimized Triple-Band Eight-Element Antenna Array for 5G Metal-frame Smartphone Applications

Micromachines ◽  
2022 ◽  
Vol 13 (1) ◽  
pp. 136
Author(s):  
Jianlin Huang ◽  
Zhuoni Chen ◽  
Qibo Cai ◽  
Tian Hong Loh ◽  
Gui Liu
Keyword(s):  
Antenna Array ◽  
Multiple Input Multiple Output ◽  
Impedance Bandwidth ◽  
Antenna Element ◽  
Total Efficiency ◽  
Smartphone Applications ◽  
Single Antenna ◽  
Metal Frame ◽  
5 Ghz ◽  
Triple Band

A multiple-input-multiple-output (MIMO) antenna array for triple-band 5G metal-frame smartphone applications is proposed in this paper. Each single antenna element consists of an S-shaped feeding strip and an L-shaped radiation strip on the metal frame. The dimension of the antenna element is only 6.5 mm × 7 mm (0.076 λ0 × 0.082 λ0, λ0 is the free-space wavelength at the frequency of 3.5 GHz). The −6 dB impedance bandwidth of the proposed eight-antenna array can cover 3.3–3.8 GHz, 4.8–5 GHz, and 5.15–5.925 GHz. The evolution design and the analysis of the optimal parameters for a single antenna element are derived to investigate the principle of the antenna. The measured total efficiency is larger than 70%. The measured isolation is better than 13 dB. The measurements of the prototype agree well with the simulation results.

scholarly journals Decoupled and Descattered Monopole MIMO Antenna Array with Orthogonal Radiation Patterns

2020 ◽  
Author(s):  
Hussain Al-Rizzo ◽  
Ayman A. Isaac ◽  
Sulaiman Z. Tariq ◽  
Samer Yahya
Keyword(s):  
Antenna Array ◽  
Mutual Coupling ◽  
Ground Plane ◽  
Design Concept ◽  
Impedance Bandwidth ◽  
Antenna Element ◽  
Radiation Patterns ◽  
Mimo Antenna ◽  
Single Antenna ◽  
Novel Design

This chapter introduces a novel design concept to reduce mutual coupling among closely-spaced antenna elements of a MIMO array. This design concept significantly reduces the complexity of traditional/existing design approaches such as metamaterials, defected ground plane structures, soft electromagnetic surfaces, parasitic elements, matching and decoupling networks using a simple, yet a novel design alternative. The approach is based on a planar single decoupling element, consisting of a rectangular metallic ring resonator printed on one face of an ungrounded substrate. The decoupling structure surrounds a two-element vertical monopole antenna array fed by a coplanar waveguide structure. The design is shown both by simulations and measurements to reduce the mutual coupling by at least 20 dB, maintain the impedance bandwidth over which S11, is less than −10 dB, and reduce the envelope correlation coefficient to below 0.001. The boresight of the far-field radiation patterns of the two vertical monopole wire antennas operating at 2.4 GHz and separated by 8 mm (λo/16), where λo is the free-space wavelength at 2.45 GHz, is shown to be orthogonal and inclined by 45° with respect to the horizontal (azimuthal) plane while maintaining the shape of the isolated single antenna element.

scholarly journals A DR Loaded Substrate Integrated Waveguide Antenna for 60 GHz High Speed Wireless Communication Systems

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Nadeem Ashraf ◽  
Hamsakutty Vettikalladi ◽  
Majeed A. S. Alkanhal
Keyword(s):  
Antenna Array ◽  
Communication Systems ◽  
High Speed ◽  
Metal Layer ◽  
Simulation Software ◽  
Impedance Bandwidth ◽  
Antenna Element ◽  
Substrate Integrated Waveguide ◽  
60 Ghz ◽  
Single Antenna

The concept of substrate integrated waveguide (SIW) technology along with dielectric resonators (DR) is used to design antenna/array for 60 GHz communication systems. SIW is created in the substrate of RT/duroid 5880 having relative permittivityεr=2.23and loss tangenttan⁡δ=0.003. H-shaped longitudinal slot is engraved at the top metal layer of the substrate. Two pieces of the DR are placed on the slot without any air gap. The antenna structures are modeled using CST Microwave Studio and then the results are verified using another simulation software HFSS. Simulation results of the two designs are presented; first a single antenna element and then to enhance the gain of the system a broadside array of1×4is presented in the second design. For the single antenna element, the impedance bandwidth is 10.33% having a gain up to 5.5 dBi. Whereas in an array of1×4elements, the impedance bandwidth is found to be 10.70% with a gain up to 11.20 dBi. For the single antenna element and1×4antenna array, the simulated radiation efficiency is found to be 81% and 78%, respectively.

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