Independently Polarization Manipulable Liquid- Crystal -Based Reflective Metasurface for 5G Reflectarray and Reconfigurable Intelligent Surface

Kim, Hogyeom; Oh, Seongwoog; Bang, S.-H.; Yang, Heesu; Kim, Byeongjin; Oh, Jungsuek

doi:10.1109/tap.2023.3283136

Cited by 13 publications

(2 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Reconfigurable intelligent surfaces (RISs) promise to improve coverage for signals negatively impacted by obstructions present in the line-of-sight (LOS) path, making them an attractive technology for 5G and beyond mobile communications [1]. A typical RIS combines passive reflective elements with active devices such as varactors [2][3][4][5] or PIN diodes [6][7][8][9], while others use phase-tunable materials such as liquid crystals [10][11][12], 2D materials [13][14][15][16][17], or phase-change materials [18,19]. Creating a tunable reflection phase gradient across a surface enables the RIS to dynamically redirect an incoming signal to an anomalous direction not predicted by Snell's Law.…”

Section: Introductionmentioning

confidence: 99%

Rapid Prototyping of Anomalous Reflective Metasurfaces Using Spray-Coated Liquid Metal

Manio,

Kouchi,

Dacuycuy

et al. 2024

Materials

View full text Add to dashboard Cite

Reconfigurable intelligent surfaces (RISs) have the potential to improve wireless communication links by dynamically redirecting signals to dead spots. Although a reconfigurable surface is best suited for environments in which the reflected signal must be dynamically steered, there are cases where a static, non-reconfigurable anomalous reflective metasurface can suffice. In this work, spray-coated liquid metal is used to rapidly prototype an anomalous reflective metasurface. Using a pressurized air gun and a plastic thin-film mask, a metasurface consisting of a 6 × 4 array of Galinstan liquid–metal elements is sprayed within minutes. The metasurface produces a reflected wave at an angle of 28° from normal in response to a normal incident 3.5-GHz electromagnetic plane wave. The spray-coated liquid–metal metasurface shows comparable results to an anomalous reflective metasurface with copper elements of the same dimensions, demonstrating that this liquid–metal fabrication process is a viable solution for the rapid prototyping of anomalous reflective metasurfaces.

show abstract

Section: Introductionmentioning

confidence: 99%

Rapid Prototyping of Anomalous Reflective Metasurfaces Using Spray-Coated Liquid Metal

Manio,

Kouchi,

Dacuycuy

et al. 2024

Materials

View full text Add to dashboard Cite

show abstract

“…In [20], a cross-shaped patch unit cell allows to scan a beam for both polarizations together in a dependently manner. In [21], a complex 15-layer structure containing two independent LC cavities and polarizers independently manipulates two orthogonal polarizations. However, a simple single-layer reflectarray based on LC with an independent control of each polarization in the same unit cell, and how to efficiently model it, can not be found in literature.…”

Section: Introductionmentioning

confidence: 99%

Electronically Reconfigurable Reflectarray Antenna Based on Single-Layer Liquid Crystal with Independent Dual-Polarization Control

Guirado,

Perez-Palomino,

de la Rosa

et al. 2023

Preprint

View full text Add to dashboard Cite

<p>This paper introduces a low-cost, easy-tomanufacture, dual polarization reconfigurable reflectarray antenna based on Liquid Crystal (LC) that operates at W-band. The antenna is electrically large and is capable of independently steering the beam of two orthogonal polarizations. Two different implementations of single-layer unit cells (single resonant and multi-resonant) capable of providing suitable phase range to independently control the two RF polarizations with enough isolation have been investigated. The single resonant cell was finally used to design, manufacture and test a complete reflectarray antenna made of 55×55 elements, for which an accurate and efficient modeling of the cells was implemented. The effect of the LC bias lines is minimized by following a thorough impact study. At a cell level, the measurements validate both the modeling and the capability of the LC to be locally biased at the same cell provided that the biasing network and the resonators of each polarization are properly distributed. At an antenna level, the measurements are predicted by simulations with excellent accuracy, which validates the design and modeling process. The measured antenna shows 35º of 1D scanning range with 25dBi gain and a maximum SLL of -9dB in the entire range for both polarizations at 98 GHz</p>

show abstract

61‐2: Implementation of Phased Array Antennas Based on Liquid Crystal Technology in Simulated Satellite Communication Systems

Liu,

Wang,

Liang

et al. 2024

Symp Digest of Tech Papers

View full text Add to dashboard Cite

A simulated satellite communication system was constructed by introducing a phased array antenna based on liquid crystal (LC) technology to achieve communication with the transmitting antennas at various alignment angles. The 16 × 16 phased array antenna serves as the receiving antenna and employs tunable microwave LC material as the reconfigurable component to achieve 360° phase shift. The algorithm for controlling the wave is integrated into the FPGA to drive the antenna array and achieve the target beam deflection to maintain communication.

show abstract

Independently Polarization Manipulable Liquid- Crystal -Based Reflective Metasurface for 5G Reflectarray and Reconfigurable Intelligent Surface

Cited by 13 publications

References 27 publications

Rapid Prototyping of Anomalous Reflective Metasurfaces Using Spray-Coated Liquid Metal

Rapid Prototyping of Anomalous Reflective Metasurfaces Using Spray-Coated Liquid Metal

Electronically Reconfigurable Reflectarray Antenna Based on Single-Layer Liquid Crystal with Independent Dual-Polarization Control

61‐2: Implementation of Phased Array Antennas Based on Liquid Crystal Technology in Simulated Satellite Communication Systems

Contact Info

Product

Resources

About