Agile Beamwidth Control and Directivity Enhancement for Aperture Radiation With Low-Profile Metasurfaces

Xiong, Jiang; Hu, Yifeng; Mao, Shuman; Zhang, Weiquan; Xiao, Shaoqiu; Wang, Bing‐Zhong

doi:10.1109/tap.2017.2784455

Cited by 7 publications

(5 citation statements)

References 20 publications

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“…An antenna employed uniaxial anisotropic near-zero metamaterial is presented to enhance the antenna beam. 12 The realized gain of the final antenna is 12.03 dBi that is 4.32 dB larger than the original one. The antenna has a 10% relative bandwidth of S 11 j j below À20 dB.…”

Section: Introductionmentioning

confidence: 89%

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Compact low‐profile wideband open‐ended rectangular waveguide antenna with corrected radiation patterns

Sun

Dou

2022

Int J RF Mic Comp-Aid Eng

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A compact low-profile wideband open-ended rectangular waveguide (RWG) antenna is proposed in the Ka-band with corrected radiation patterns. The antenna is developed on a piece of metal with the same size as the standard flange of WR-28 waveguide to facilitate the integration. To improve the impedance matching, waveguide steps are introduced at the open end of RWG. Three grooves are then presented on the top of antenna to suppress the surface waves. Finally, the grooves are modified at the corner to reduce the difference of radiation patterns in the E-plane and H-plane. To verify the proposed antenna, a prototype is fabricated and measured. The impedance bandwidth of 27.3-35.6 GHz (in a fraction of 26.3%) with S 11 j j< À 20 dB is realized. The corresponding gain over the operating band ranges from 9.1 to 10.2 dBi. Similar radiation patterns are measured in the E-plane and H-plane. This antenna is quite promising as a feeding source for the applications of reflectarray, reflector, transmitarray, and lens.

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Section: Introductionmentioning

confidence: 89%

“…This antenna has a square aperture of 1.85 λ 0 × 1.85 λ 0 and the height of the FP cavity is around λ 0 . An antenna employed uniaxial anisotropic near‐zero metamaterial is presented to enhance the antenna beam 12 . The realized gain of the final antenna is 12.03 dBi that is 4.32 dB larger than the original one.…”

Section: Introductionmentioning

confidence: 99%

Compact low‐profile wideband open‐ended rectangular waveguide antenna with corrected radiation patterns

Sun

Dou

2022

Int J RF Mic Comp-Aid Eng

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“…In circularly polarised high gain antenna for gain enhancement PRS structure has been used [13]. In [14], the directivity has been enhanced, and beamwidth is controlled by using a low-profile metasurface. In high gain antenna systems for biomedical applications, the metamaterial and superstate with high permittivity have been used for gain enhancement [15].…”

Section: Introductionmentioning

confidence: 99%

A High-Gain Dual-Band Superstates Enabled Antenna for 5G-mm Wave Applications

Khan¹,

Ahmad²,

Alam³

2022

PIER C

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In this article, the antenna is designed by using different shapes of patch structures on 8.468 × 9.741 mm 2 ground plane. Different shapes like A, H, F, T, and U are simulated by using HFSS Software. For gain enhancement, various techniques on the different shape patches have been applied. The maximum gain achieved in the case of A shape patch with MTM structure and circular reflector with superstates is 14.2 dBi, and the band covered is GHz. Other shapes like H, F, T, and U are designed by modification in A shape patch, and by applying various techniques like MTM and reflector surface with superstates interesting results have been achieved. The designed antenna is an mm-wave antenna and a novel structure for 5G communications.

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“…were also shown to have enhanced gain. Apart from such bulk-metamaterial-based gain enhancement, several works have studied gain enhancement using metasurfaces [6]- [12]. But all these works focus on gain enhancement of radiating structures using near-zero physical properties rather than enhancement of total radiated power.…”

Section: Introductionmentioning

confidence: 99%

Analytical and Numerical Investigation of Radiation Enhancement by Anisotropic Metamaterial Shells

Kumar

Pollock²,

Saha

et al. 2020

IEEE Access

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This paper presents analytical and numerical investigations of a 3D cylindrical metamaterial shell possessing a cylindrically anisotropic permeability that is excited by a finite-sized electric line source. A comprehensive field analysis of the system reveals that the compact metamaterial shell exhibits resonances akin to those observed in isotropic 2D cylindrical metamaterial structures, which may be used to enhance the radiated power of a nearby antenna. An analytical resonance condition that relates the dimensions of the cylindrical shell to its anisotropic effective-medium parameters is shown to be accurate in predicting the resonances of 2D and 3D metamaterial shells obtained using full-wave simulations. The effects of anisotropy and finite shell/antenna height on the system's near-fields, radiation patterns, and power-ratio enhancements are explored. It is shown through both theory and simulations that the condition for resonance is largely independent of shell/antenna height but that the quality factor reduces dramatically as these heights approach electrically small values. Also, a dispersion and loss analysis assuming Lorentz model is carried out, which indicates that practical metamaterial losses do not significantly degrade the power enhancement.

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Agile Beamwidth Control and Directivity Enhancement for Aperture Radiation With Low-Profile Metasurfaces

Cited by 7 publications

References 20 publications

Compact low‐profile wideband open‐ended rectangular waveguide antenna with corrected radiation patterns

Compact low‐profile wideband open‐ended rectangular waveguide antenna with corrected radiation patterns

A High-Gain Dual-Band Superstates Enabled Antenna for 5G-mm Wave Applications

Analytical and Numerical Investigation of Radiation Enhancement by Anisotropic Metamaterial Shells

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