Miniaturized absorption and transmission integrated frequency selective structure

By employing a combination of lossy layers, lossless layers, and foam structures in the integrated penetration-absorbing frequency selective structure, the problem of miniaturization of the cycle was solved, achieving electromagnetic wave characteristics with high transmission and high absorption, and improving the stealth effect of the radar antenna system.

CN114094344BActive Publication Date: 2026-02-27LEIHUA ELECTRONICS TECH RES INST AVIATION IND OF CHINA
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Patent Information

Application Number
CN202111308413.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-11-05
Publication Date
2026-02-27
Estimated Expiration
2041-11-05

AI Technical Summary

Technical Problem

Existing penetrating integrated frequency selective surfaces have not been effectively miniaturized, making it difficult to etch complete metal patterns within a limited space, which affects the stability of electromagnetic waves and stealth performance.

Method used

The structure employs an integrated absorption and penetration design with N×N structural units, including both transmission and absorption bands. It utilizes a combination design of lossy layers, lossless layers, and foam structures, and achieves periodic miniaturization through double-helix metal wires and buried resistance structures to form a loop to suppress electromagnetic wave scattering.

Benefits of technology

It achieves high transmission and absorption of electromagnetic waves under miniaturized conditions, improving the stability and stealth performance of electromagnetic waves, and is suitable for the stealth design of radar antenna systems.

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Abstract

The application belongs to the field of microwave technology, and particularly relates to a miniaturized absorption and penetration integrated frequency selection structure, which comprises a loss structure, a non-loss structure and a foam structure. The loss structure comprises a square first dielectric plate, the front surface of which is provided with a double helical metal wire formed by spirally winding a metal wire, the two ends of the double helical metal wire are connected with a buried resistance structure, and the buried resistance structure is arranged on the back surface of the first dielectric plate. The non-loss structure is square and comprises a first metal layer, a second metal layer and a third metal layer, the first metal layer and the second metal layer are separated by a dielectric plate, the second metal layer and the third metal layer are separated by a dielectric plate, the first metal layer and the third metal layer each comprise metal patches which are distributed in a circumferential direction and have the same period, and the second metal layer is a rectangular metal frame. The foam structure is connected with and separates the non-loss structure and the loss structure, and the application can ensure the suppression of high-frequency Bragg lobes with extremely small unit size.
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