A reconfigurable phase gradient metasurface antenna for beam steering

Yuan, Yi; Ding, Jun; Guo, Chao; Huang, Chao

doi:10.1002/mop.33676

Cited by 4 publications

(3 citation statements)

References 20 publications

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“…Figure 2 a, b show the two commonly used schematic frameworks for the conventional RISs: the stacked multilayer RIS 44 , 45 , 52 – 54 and receiver-transmitter RIS 38 – 42 . Based on the concept of frequency-selective-surface (FSS), the stacked multilayer RIS can exhibit satisfactory phase-shifting property performance, but the high profile makes it less preferred in wireless communication systems.…”

Section: Resultsmentioning

confidence: 99%

“…The ratio BW/BW3dB is used to evaluate the operating BW as a percentage of BW3dB. It can be observed that the BW/BW3dB of the stacked multilayer RIS is very small because the operating BW is much narrower than BW3dB 44 , 45 , 52 – 54 . Compared with them, the proposed RIS has a much larger BW/BW3dB value of 96%, suggesting a very narrow occupied bandwidth.…”

Section: Resultsmentioning

confidence: 99%

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A filtering reconfigurable intelligent surface for interference-free wireless communications

Liang,

Zhang,

Luo

et al. 2024

Nat Commun

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The powerful capability of reconfigurable intelligent surfaces (RISs) in tailoring electromagnetic waves and fields has put them under the spotlight in wireless communications. However, the current designs are criticized due to their poor frequency selectivity, which hinders their applications in real-world scenarios where the spectrum is becoming increasingly congested. Here we propose a filtering RIS to feature sharp frequency-selecting and 2-bit phase-shifting properties. It permits the signals in a narrow bandwidth to transmit but rejects the out-of-band ones; meanwhile, the phase of the transmitted signals can be digitally controlled, enabling flexible manipulations of signal propagations. A prototype is designed, fabricated, and measured, and its high quality factor and phase-shifting characteristics are validated by scattering parameters and beam-steering phenomena. Further, we conduct a wireless communication experiment to illustrate the intriguing functions of the RIS. The filtering behavior enables the RIS to perform wireless signal manipulations with anti-interference ability, thus showing big potential to advance the development of next-generation wireless communications.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

A filtering reconfigurable intelligent surface for interference-free wireless communications

Liang,

Zhang,

Luo

et al. 2024

Nat Commun

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show abstract

“…1 Compared to the traditional metal reflector and phased array, planar RA has the advantages of low profile, [2][3][4] high gain, [5][6][7] low cost, 8 simple deployment and mobility, and is widely used in automotive/airborne radar, 9 satellite/space communication, 10,11 low-cost beam steering 12,13 and many other fields. The majority of existing RA designs are linearly polarized (LP) [8][9][10][11][12][13] and are susceptible to electromagnetic interference and multipath effect caused by complex environment, which easily leads to polarization misalignment and power transmission loss. 14,15 This problem can be effectively prevented by circularly polarized (CP) antennas due to the robustness of circular polarizations against environmental interferences.…”

Section: Introductionmentioning

confidence: 99%

A wideband low‐profile dual‐circularly polarized reflectarray with decoupled LHCP/RHCP beams

Fan

Lin

Yang

et al. 2023

Micro & Optical Tech Letters

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This letter presents the design principle and experimental verification of a Ku‐band wideband low‐profile dual‐circularly polarized (dual‐CP) reflectarray (RA) with independent control of left‐/right‐handed circularly polarized (LHCP/RHCP) beams. Both the dynamic phase (DP) and Berry phase (BP) compensating methods are employed in the design of the unit cell, achieving independent LHCP/RHCP phase modulation based on the single‐functional‐layer concept. A single‐layer unit cell is designed, offering a ‐bit dual‐CP phase shift which facilitates the independent control of LHCP/RHCP beams. A prototype with asymmetrical dual‐CP beams is fabricated and tested. For LHCP and RHCP excitation, beam directions of () and () are realized, respectively, with sidelobe levels and cross‐polarizations both under −15 dB. The prototype exhibits a wide axial ratio (AR) bandwidth of over 36% with AR dB. The overlapped 1‐dB gain and AR dB bandwidth is 19.5% under LHCP input and 12.2% under RHCP input, with maximum aperture efficiency of 41.3% and 34.6%, respectively. The proposed dual‐CP RA exhibits broad band, pure chirality, high gain, low profile and independent polarization control, with single‐layer construction which is of low cost and easy processing.

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Gravitationally controlled passive beam steering of a printed cross dipole antenna

Borah

2024

Micro & Optical Tech Letters

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In this study, the design and characterization of a printed cross‐dipole antenna with a gravitationally controlled passive beam steering technique has been presented. The steering of the beam is achieved by using a floating reflector that remains parallel to the earth surface when the antenna along with the mounted body gets inclined while traveling through uneven roadways. Initially, the microstrip cross dipole antenna is designed and simulated along with the reflector to operate in one of the allocated 5G frequency bands of 2.6 GHz. This is followed by the fabrication of the antenna prototype along with a glass chamber where the reflector is kept floated over the fluid. Measurements are carried out and are in good comparison with that of the simulated one. This presented work can be a potential passive beam steering technique that can be used for surface‐to‐air communication systems.

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A reconfigurable phase gradient metasurface antenna for beam steering

Cited by 4 publications

References 20 publications

A filtering reconfigurable intelligent surface for interference-free wireless communications

A filtering reconfigurable intelligent surface for interference-free wireless communications

A wideband low‐profile dual‐circularly polarized reflectarray with decoupled LHCP/RHCP beams

Gravitationally controlled passive beam steering of a printed cross dipole antenna

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