A Low-Profile, Risley-Prism-Based, Beam-Steerable Antenna Employing a Single Flat Prism

Zhang, Zongtang; Zhong, Yi; Luyen, Hung; Booske, John H.; Behdad, Nader

doi:10.1109/tap.2022.3161562

Cited by 23 publications

(5 citation statements)

References 30 publications

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“…Firstly, thanks to the directional-fed topology, it achieves a 3 dB gain bandwidth of 16%, which is almost double of the bandwidth using conventional Yagi-Uda antenna [43]. Secondly, although high aperture efficiency is achieved in [38], its bandwidth is sacrificed due to the destructive effect of 'rabbit ear'. In the proposed work, by using variable modulation index and double-layer parabolic reflector, the aperture efficiency is significantly improved compared to other designs [18,40] while maintaining the bandwidth.…”

Section: Simulation and Experiments Verificationmentioning

confidence: 99%

“…A scalar holographic metasurface achieves a maximum aperture efficiency of 18.8%, but narrow bandwidth of 10% [30]. To simultaneously manipulate the amplitude, phase and polarization of electromagnetic waves, tensor holographic metasurface is proposed [34][35][36][37][38]. The aperture efficiency is significantly improved to 34.5%, but the bandwidth is reduced to 7% [38].…”

Section: Introductionmentioning

confidence: 99%

“…To simultaneously manipulate the amplitude, phase and polarization of electromagnetic waves, tensor holographic metasurface is proposed [34][35][36][37][38]. The aperture efficiency is significantly improved to 34.5%, but the bandwidth is reduced to 7% [38]. To alleviate this issue, a novel frequency-dependent non-uniform modulation method is proposed, and a wide bandwidth of 21% is achieved [39].…”

Section: Introductionmentioning

confidence: 99%

“…Secondly, the above works use monopole feed at the center of holographic metasurface [30][31][32][33][34][35][36][37][38][39], which may cause an undesirable phenomenon of 'rabbit ear' [40]. The radiation corresponding to the backward mode plays a constructive role only at designed frequency, therefore, the destructive effect on other frequencies results in narrow bandwidth [41].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Wideband directional-fed holographic metasurface with integrated monopole and parabolic reflector for far-/near-field beams manipulations

Xue,

Shen,

et al. 2024

J. Phys. D: Appl. Phys.

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Holographic metasurface has been widely investigated, but suffers from the trade-off between bandwidth, gain, and integration. In this article, a wideband high-gain holographic metasurface with integrated monopole is proposed. It employs the geometrical characteristics of parabolic reflector to realize directional-fed metasurface, and the footprint is reduced to only one-third of the conventional center-fed designs. By varying modulation index and paraboloid height, the bandwidth and gain are improved simultaneously. To validate the proposed idea, two prototypes are analyzed and fabricated to demonstrate flexible beam manipulation in respective far-field radiation and near-field propagation. In both cases, the measured results are well-matched with the simulation. The proposed holographic metasurface for far-field appliactions features wide bandwidth, high gain, and planar integration simultaneously. Moreover, to the best of the authors’ knowledge, this is the first Bessel beam generator using directional-fed holographic metasurface with parabolic reflector.

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Section: Simulation and Experiments Verificationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Wideband directional-fed holographic metasurface with integrated monopole and parabolic reflector for far-/near-field beams manipulations

Xue,

Shen,

et al. 2024

J. Phys. D: Appl. Phys.

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“…The concept of a reconfigurable antenna was first proposed by Schaubert et al in 1983 [4]. The radiation pattern reconfigurable antenna has been extensively studied due to its potential to enhance the quality and security of wireless communication systems while mitigating noisy environments [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Mechanical azimuthal beam‐steering Fabry–Perot resonator antenna with large deflection angle

Liu,

Zhu,

Zhang

et al. 2024

IET Microwaves Antenna & Prop

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Continuous beam steering approach with minimal power consumption is highly desirable in modern antenna designs. A simple mechanical method for achieving beam steering in the Fabry–Perot resonator antenna (FPRA) is presented. It involves rotating the upper phase gradient metasurface (PGM) mechanically to change the aperture phase distribution, so the beam is continuously steered in the azimuthal plane while maintaining a large elevation angle. The proposed PGM unit cell comprises a hexagonal ring and patch printed on both sides of the substrate, along with a honeycomb lattice. A prototype antenna operating at 5.65 GHz is fabricated and measured to validate the feasibility. Measurement results show that the FPRA achieves a gain of 14.9 dBi, and can continuously steer its beam in the azimuthal plane with an elevation angle of around θ = 50°. Measured radiation patterns in eight azimuthal directions (φ = 0°, 45°, 90°, 135°, 180°, 225°, 270°, and 315°) are consistent with the simulated results. Compared with other electrical tuning methods, our design has a compact size and requires lower power for the PGM rotation.

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Other Beam-Scanning Techniques

Koul,

Swapna,

Karthikeya

2024

Antenna Systems for Modern Wireless Devices

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A Low-Profile, Risley-Prism-Based, Beam-Steerable Antenna Employing a Single Flat Prism

Cited by 23 publications

References 30 publications

Wideband directional-fed holographic metasurface with integrated monopole and parabolic reflector for far-/near-field beams manipulations

Wideband directional-fed holographic metasurface with integrated monopole and parabolic reflector for far-/near-field beams manipulations

Mechanical azimuthal beam‐steering Fabry–Perot resonator antenna with large deflection angle

Other Beam-Scanning Techniques

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