Electromagnetic wave attenuation film

The double-sided patch type electromagnetic wave attenuation film with polygonal conductive elements addresses the issue of varying polarization angles, ensuring consistent absorption across different angles, thereby improving performance in multipath communication environments.

JP2025097558APending Publication Date: 2025-07-01TOPPAN HOLDINGS INC
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Patent Information

Application Number
JP2023213798
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2023-12-19
Publication Date
2025-07-01

AI Technical Summary

Technical Problem

Conventional electromagnetic wave absorbers fail to account for differences in absorption characteristics due to varying polarization angles of incident electromagnetic waves, leading to inconsistent performance in multipath communication environments.

Method used

A double-sided patch type electromagnetic wave attenuation film with conductive elements shaped as polygons with five or more sides, including a dielectric substrate, thin film conductive layers on both surfaces, a support layer, and a planar inductor, designed to enhance absorption across multiple polarization angles.

Benefits of technology

The film provides consistent and effective absorption of electromagnetic waves with varying polarization angles, reducing variations in absorption characteristics and enhancing performance in multipath communication environments.

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Abstract

To provide a double-sided patch-type electromagnetic wave attenuation film having a conductive element that is shaped to exhibit good absorption characteristics when electromagnetic waves having a plurality of polarization angles are incident.SOLUTION: An electromagnetic wave attenuation film includes an electromagnetic wave attenuation base having a dielectric substrate having a front surface and a back surface and a thin-film conductive layer disposed on both the front surface and the back surface of the dielectric substrate, a support layer disposed on the back surface of the electromagnetic wave attenuation base, and a flat plate type inductor disposed on the back surface of the support layer. The thin-film conductive layer includes a plurality of conductive elements, and the shapes of the conductive elements are polygons having pentagons or more. The conductive elements may be shaped as a hexagon or more, or may be hexagonal. Electromagnetic waves having a plurality of polarization angles may be incident onto the electromagnetic wave attenuation film.SELECTED DRAWING: Figure 1
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Citation Information

Patent Citations

  • Electromagnetic wave absorption sheet

    JP2022080991A