Radio wave reflection device

The radio wave reflecting device addresses temperature sensitivity issues by employing a heat-insulating housing with a dielectric material and vacuum insulation, ensuring stable radio wave reflection directions and reducing the need for additional temperature control systems.

WO2026023255A1 Publication Date: 2026-01-29JAPAN DISPLAY INC
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Patent Information

Application Number
PCT/JP2025/020386
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-07-24
Filing Date
2025-06-05
Publication Date
2026-01-29

AI Technical Summary

Technical Problem

Radio wave reflecting devices using liquid crystal materials are sensitive to temperature fluctuations, leading to unpredictable radio wave reflection directions when the temperature exceeds a certain range, necessitating improved temperature resistance.

Method used

A radio wave reflecting device with a housing having a heat-insulating structure and a dielectric material covering the radio wave reflection surface, incorporating a heat-insulating layer and a vacuum-insulated design to maintain a stable temperature environment for the liquid crystal layer.

Benefits of technology

The device maintains the temperature within an optimal range for the liquid crystal layer, ensuring consistent and controlled radio wave reflection directions, reducing the need for additional heating or cooling systems and enhancing durability.

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Abstract

A radio wave reflection device according to the present invention has: a radio wave reflection plate that has a radio wave reflection surface at which are arranged a plurality of reflection elements that have a patch electrode and a common electrode; and a housing that houses the radio wave reflection plate. The housing has a heat insulation structure, and at least a region that covers the radio wave reflection surface of the radio wave reflection plate is formed from a dielectric material. The housing has an inner shell and an outer shell that is positioned outside the inner shell. The housing may also have a heat insulation layer that is in a vacuum state between the inner shell and the outer shell.
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