Fresnel zone plate and beam focusing, transparent reconfigurable intelligent surface using fresnel zone plate

A single-layer Fresnel zone plate on glass addresses the challenges of beamforming in 5G networks by selectively transmitting and blocking electromagnetic waves, enhancing transparency and simplifying processing while effectively addressing the challenges of conventional transmit array structures, enhancing the transparency and simplifying processing complexity.

WO2026134363A1PCT designated stage Publication Date: 2026-06-25LG ELECTRONICS INC
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
LG ELECTRONICS INC
Filing Date
2024-12-16
Publication Date
2026-06-25

AI Technical Summary

Technical Problem

Conventional transmit array structures for 5G networks face challenges in processing and fabrication due to multiple unit cells with different phase delays and require multiple metal pattern layers, reducing transparency and complicating the formation of beamforming technology on materials like glass.

Method used

A Fresnel zone plate with a single-layer metal pattern on glass that selectively transmits and blocks electromagnetic waves by frequency, using a pattern of concentric circles with alternating electromagnetic wave transmission and blocking regions, including meandered circular ring patterns to enhance transparency and reduce processing complexity.

Benefits of technology

The solution enables effective beam focusing and increased transparency by selectively transmitting and blocking specific frequency bands, improving signal strength and reducing processing difficulty compared to conventional methods.

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Abstract

Various embodiments of the present disclosure relate to a Fresnel zone plate having, applied on glass, a pattern for frequency-selectively transmitting or blocking electromagnetic waves, and a transparent reconfigurable intelligent surface for beam focusing using the Fresnel zone plate. The reconfigurable intelligent surface may comprise: glass; and a Fresnel zone plate formed on the glass and including a Fresnel zone plate (FZP) pattern including an innermost central circle region formed as a plurality of concentric circles on the same plane and a plurality of circular ring regions surrounding the central circle region and an inner circular ring region, wherein the central circle region and the plurality of circular ring regions are alternately set as an electromagnetic wave transmission region and an electromagnetic wave blocking region, and the electromagnetic wave blocking region includes a plurality of electromagnetic wave blocking patterns formed of metal.
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