Low-Profile Multibeam Antenna Based on Modulated Metasurface

Wen, Yubo; Qin, Pei-Yuan; Maci, S.; Guo, Y. Jay

doi:10.1109/tap.2023.3281677

Cited by 12 publications

(8 citation statements)

References 38 publications

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“…It can be observed that the proposed antenna has the lowest profile (0.034

{\lambda }_{0}

) and maximum pitch angle (

6{6}^{\circ }

). The higher gains in Gonzlez‐Ovejero and colleagues 23–25 come with larger aperture sizes by using multi feeds. Also, the proposed antenna is low cost compared with using massive varactors.…”

Section: Simulation and Measurement Resultsmentioning

confidence: 99%

“…But those antennas have a relatively narrow impedance bandwidth. Also, for the antennas based on modulated metasurface, independent beams can be obtained, including loading varactors 21,22 and using multi feeds 23–25 . Compared with placing varactors and adding dc bias, it is much easier and lower cost by loading multi feeds in practice.…”

Section: Introductionmentioning

confidence: 99%

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A low‐profile and broadband multibeam antenna based on modulated impedance metasurface

Zhang,

Peng

2023

Micro & Optical Tech Letters

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A low‐profile and broadband antenna based on modulated metasurface is proposed to obtain beam switching in the azimuth plane. The antenna is composed of four ports and a metasurface. A T‐slot is etched in the squared metal patch and is designed to increase the impedance modulation range and form the metasurface. Finally, the antenna generates a linearly polarized tilted beam within a wide band in the elevation plane. And the maximum tilt angle reaches . At the azimuth plane, the beam switching is realized by feeding different ports. The experimental results show that the −10 dB relative bandwidth is 25.4% (4.47–5.74 GHz). At azimuth angles of , and , four independent beams are formed in the operating frequency band with a maximum gain of 9.43 dBi. In addition, the proposed antenna possesses the advantages of low profile () and good isolation (10 dB) between ports.

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“…It can be observed that the proposed antenna has the lowest profile (0.034

{\lambda }_{0}

) and maximum pitch angle (

6{6}^{\circ }

Section: Simulation and Measurement Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A low‐profile and broadband multibeam antenna based on modulated impedance metasurface

Zhang,

Peng

2023

Micro & Optical Tech Letters

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“…Moreover, only seven works have reported amplitude control of the radiated beam. Only [ 16 , 19 , 20 , 21 , 27 , 32 ] possess capabilities in beam multiplicity and azimuthal variability. Among these, only [ 16 , 21 , 27 ] are unable to provide any forms of beam control, with the rest ([ 19 , 20 , 32 ]) all afford gain, polarization, and phase controls.…”

Section: Comparisons With Existing Literaturementioning

confidence: 99%

“…Only [ 16 , 19 , 20 , 21 , 27 , 32 ] possess capabilities in beam multiplicity and azimuthal variability. Among these, only [ 16 , 21 , 27 ] are unable to provide any forms of beam control, with the rest ([ 19 , 20 , 32 ]) all afford gain, polarization, and phase controls. Among all 18 contenders, only seven of the 18 claimed the capability of beam polarization control, most of them having used the method of tensor impedance to synthesize holograms that achieve the desired effects, and all of them offered phase control as well.…”

Section: Comparisons With Existing Literaturementioning

confidence: 99%

“…Prior studies have reported the use of tensor surface impedance elements for achieving control of polarization and phase of the radiation, e.g., [ 17 , 18 , 19 , 20 ]. Moreover, most reported modulated metasurfaces only produced a limited number of beams, although a study of five beams emitted by a superposed holographic pattern was conducted in [ 21 ]. Despite the study in [ 22 ] of multiple beams achievable by a superposed holographic pattern, it was however only for radiation of a single linear polarization within a single vertical (azimuth) plane by a linear array.…”

Section: Introductionmentioning

confidence: 99%

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Tensor-Free Holographic Metasurface Leaky-Wave Multi-Beam Antennas with Tailorable Gain and Polarization

Weng,

Tsai,

Vilenskiy

et al. 2024

Sensors

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Recently, the community has seen a rise in interest and development regarding holographic antennas. The planar hologram is made of subwavelength metal patches printed on a grounded dielectric board, constituting flat metasurfaces. When a known reference wave is launched, the hologram produces a pencil beam towards a prescribed direction. Most earlier works on such antennas have considered only a single beam. For the few later ones that studied multiple beams, they were achieved either by having each beam taken care of by a distinct frequency or by partitioning the hologram, thereby depriving each beam of the directivity it could have had it not shared the holographic aperture with other beams. There have been recent studies related to the use of tensor surface impedance concepts for the synthesis of holograms which have attained control over the polarizations and intensities of the beams. However, this approach is complicated, tedious, and time-consuming. In this paper, we present a method for designing a planar holographic leaky-wave multi-beam metasurface antenna, of which each simultaneous beam radiating at the same frequency towards any designated direction has a tailorable amplitude, phase, and polarization, all without hologram partitioning. Most importantly, this antenna is exempted from the need for the cumbersome technique of tensor impedance. Such features of beam configurability are useful in selective multiple-target applications that require differential gain and polarization control among the various beams. Only a single source is needed, which is another benefit. In addition, effective methods to mitigate sidelobes are also proposed here. Designs by simulations according to the method are herein validated with measurements performed on fabricated prototypes.

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Complex‐Amplitude Programmable Versatile Metasurface Platform Driven by Guided Wave

Han,

Meng,

Guan

et al. 2024

Advanced Science

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Metasurfaces have shown unparalleled controllability of electromagnetic (EM) waves. However, most of the metasurfaces need external spatial feeding sources, which renders practical implementation quite challenging. Here, a low‐profile programmable metasurface with 0.05λ0 thickness driven by guided waves is proposed to achieve dynamic control of both amplitude and phase simultaneously. The metasurface is fed by a guided wave traveling in a substrate‐integrated waveguide, avoiding external spatial sources and complex power divider networks. By manipulating the state of the p‐i‐n diodes embedded in each meta‐atom, the proposed metasurface enables 1‐bit amplitude switching between radiating and nonradiating states, as well as a 1‐bit phase switching between 0° and 180°. As a proof of concept, two advanced functionalities, namely, low sidelobe‐level beam scanning and Airy beam generation, are experimentally demonstrated with a single platform operating in the far‐ and near‐field respectively. Such complex‐amplitude, programmable, and low‐profile metasurfaces can overcome integration limitations of traditional metasurfaces, and open up new avenues for more accurate and advanced EM wave control within an unprecedented degree of freedom.

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Low-Profile Multibeam Antenna Based on Modulated Metasurface

Cited by 12 publications

References 38 publications

A low‐profile and broadband multibeam antenna based on modulated impedance metasurface

A low‐profile and broadband multibeam antenna based on modulated impedance metasurface

Tensor-Free Holographic Metasurface Leaky-Wave Multi-Beam Antennas with Tailorable Gain and Polarization

Complex‐Amplitude Programmable Versatile Metasurface Platform Driven by Guided Wave

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