Visible-infrared transparent broadband microwave absorption light window based on multi-resonance

The visible-infrared transparent broadband microwave absorption window uses a metal microstructure resonance layer and Fabry-Perot cavity resonance to achieve wide-band optical transparency and broadband microwave absorption, overcoming previous technologies' limitations in bandwidth and transparency.

CN119155977APending Publication Date: 2024-12-17HARBIN INST OF TECH
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Patent Information

Application Number
CN202411290280.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-09-14
Publication Date
2024-12-17

AI Technical Summary

Technical Problem

Existing microwave absorption technologies struggle to achieve simultaneous high transparency in the visible-infrared band and broadband absorption, particularly in aerospace applications, due to limitations in bandwidth expansion and material transparency across both visible and infrared ranges.

Method used

A visible-infrared transparent broadband microwave absorption window utilizing a metal microstructure resonance layer with dual resonance frequencies, combined with a Fabry-Perot cavity resonance, achieved through a metal microstructure resonance layer, transparent medium layer, and metal grid layer, ensuring low duty cycles and wide-band optical transparency.

Benefits of technology

The solution enables high transparency in the visible-infrared range while achieving broadband microwave absorption, addressing the limitations of previous technologies by enhancing bandwidth and transparency across both bands.

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Abstract

The invention discloses a visible-infrared transparent broadband microwave absorption light window based on multi-resonance, and belongs to the field of optical transparent electromagnetic shielding and microwave absorption. The light window is composed of a metal microstructure resonance layer, a transparent dielectric layer and a metal mesh layer which are sequentially stacked from top to bottom. The metal microstructure resonance layer can generate electric resonance with double resonant frequencies due to the existence of pores and patches, and the metal microstructure resonance layer, the transparent dielectric layer and the metal mesh layer are utilized to form a Fabry-Perot cavity to generate Fabry-Perot cavity resonance. Broadband microwave absorption is formed under the combined action of electric resonance with double resonant frequencies and Fabry-Perot cavity resonance. In addition, the metal microstructure resonance layer and the metal mesh layer have extremely low metal duty ratios, and visible-infrared broadband high light transmission can be achieved. The application range of the optical transparent broadband microwave absorption technology is expanded, and the optical transparent broadband microwave absorption device has the advantages of corrosion resistance, wide absorption bandwidth, visible-infrared broadband light transmission and the like.
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Citation Information

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