A dual-band reconfigurable intelligent metasurface with beam steering

Lin, Hai; Yu, Wen Ming; Tang, Rongxin; Jin, Jing; Wang, Yumei; Xiong, Jie; Wu, Yanjie; Zhao, Junming

doi:10.1088/1361-6463/ac5663

Cited by 22 publications

(8 citation statements)

References 31 publications

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“…Metasurface are well-known for their manipulation of EM waves. Beam focusing and deflecting are one of the basic applications of the metasurface [ 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 ]. In the microwave band, there have been mature approaches using the phased arrays technique.…”

Section: Novel Applications Of Metasurfacesmentioning

confidence: 99%

Recent Advances in Reconfigurable Metasurfaces: Principle and Applications

et al. 2023

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Metasurfaces have shown their great capability to manipulate electromagnetic waves. As a new concept, reconfigurable metasurfaces attract researchers’ attention. There are many kinds of reconfigurable components, devices and materials that can be loaded on metasurfaces. When cooperating with reconfigurable structures, dynamic control of the responses of metasurfaces are realized under external excitations, offering new opportunities to manipulate electromagnetic waves dynamically. This review introduces some common methods to design reconfigurable metasurfaces classified by the techniques they use, such as special materials, semiconductor components and mechanical devices. Specifically, this review provides a comparison among all the methods mentioned and discusses their pros and cons. Finally, based on the unsolved problems in the designs and applications, the challenges and possible developments in the future are discussed.

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Section: Novel Applications Of Metasurfacesmentioning

confidence: 99%

Recent Advances in Reconfigurable Metasurfaces: Principle and Applications

et al. 2023

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“…Examples of typical reconfigurable antenna array systems are phased arrays, transmitarrays/reflectarrays, metasurfaces, and frequency selective surfaces (FSS). In recent years, reconfigurable intelligent surfaces (RIS) have garnered more interest and offer reconfigurable properties similar to those in the other aforementioned systems as well as this work [ 6 , 7 , 8 ]. RIS can be considered as a reflectarray and metasurface hybrid [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

A 4 × 4 Active Antenna Array with Adjustable Beam Steering

Verho

Nguyễn

Chung

2023

Sensors

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An adjustable 4×4 antenna array with electrical beam steering and polarization control is presented. Here, adjustability means the ability to correct the beam steering angle post-calibration. The objective is to improve the steering accuracy which is critical in point-to-point communication as inaccuracy will cause transmission failure due to a missed target. The accuracy is enhanced by adjusting the beam steering angle in beamforming calculations. To execute this, the system is calibrated by measuring several unit cells of a partial 4×4 array structure at different voltage bias points and calculating an average model of the phase shift profile. This reduces the phase error from variations between components and robust beam steering is achieved. This technique is utilized in far-field measurements, and fairly accurate initial beam steering angles are achieved at 3 GHz. The accuracy is further improved by over or under steering the desired angle in the beamforming calculations to finally achieve the steering angle of interest with an accuracy of 2∘. Overall, the main beam is incrementally steered from 0∘ to 45∘ with the gain ranging from 4.7 dB to 2.8 dB. The polarization control is also demonstrated in horizontal and vertical directions for a linearly polarized wave.

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“…Multichannel signals are transmitted independently and simultaneously in the same wireless environment by manipulating the EM waves independently on two or more frequency bands, thus increasing the communication capacity without enlarging the RIS aperture size [17,18]. Some approaches on dual-band RISs [17,19,20,21] have been proposed, but their reflection phases cannot be independently modulated on both bands.…”

Section: Introductionmentioning

confidence: 99%

A dual-band 3-bit reconfigurable intelligent surface with independent control of phases

Liang¹,

Gao²,

Dai³

et al. 2023

ITU J-FET

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Reconfigurable Intelligent Surfaces (RISs) have received a great deal of attention from the wireless communication community due to their powerful ability to improve the wireless communication environment. Dual-band RIS enables aperture to share two bands, improving spectrum utilization in wireless communications and thus expanding communication capacity. However, most of the reported dual-band RISs cannot achieve independent controls of the dual-band phases, which greatly limits their practical application in wireless communications. In this paper, we propose a dual-band 3-bit RIS to achieve independent controls of the reflection phases in two frequency bands by designing two tunable structures without raising the profile. It also exhibits low sensitivity to incident angles between 0° and 50°. Thereafter, the beam steering ability of the proposed RIS is further investigated with experiments under normal and oblique incidences at two frequencies, which demonstrates the powerful potential of RISs to manipulate the electromagnetic wave propagation environment.

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A dual-band reconfigurable intelligent metasurface with beam steering

Cited by 22 publications

References 31 publications

Recent Advances in Reconfigurable Metasurfaces: Principle and Applications

Recent Advances in Reconfigurable Metasurfaces: Principle and Applications

A 4 × 4 Active Antenna Array with Adjustable Beam Steering

A dual-band 3-bit reconfigurable intelligent surface with independent control of phases

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