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Dual-polarization broadband multifunctional active wave-absorbing/reflecting device

A multi-functional, dual-polarization technology, applied in the field of electromagnetic metamaterials, can solve the problems of narrow switchable bandwidth, sensitive polarization characteristics, single electromagnetic function of active absorbing/reflector, etc., to achieve stable dual-polarization characteristics, The effect of enriching polarization information

Active Publication Date: 2021-08-06
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a dual-polarization broadband multifunctional active absorber / reflector, which can effectively solve the problems of existing active absorber / reflectors with single electromagnetic function, narrow switchable bandwidth and sensitive polarization characteristics

Method used

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  • Dual-polarization broadband multifunctional active wave-absorbing/reflecting device

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Embodiment

[0031] A dual-polarized broadband multifunctional active absorber / reflector, including a plurality of periodically arranged superunits 1, each superunit includes four basic units 2, and the four basic units 2 are arranged in a 2×2 matrix The two adjacent basic units are arranged in a 90° rotation relationship, and the two adjacent basic units 2 are connected by patch inductance. The basic unit 2 includes a top active frequency selection surface 3 and a bottom metal ground 4. The top layer An air matching layer 5 is provided between the active frequency selective surface 3 and the underlying metal ground 4 . The top active frequency selective surface 3 includes a dielectric substrate 3-4, a metal structure 3-1, and the metal structure 3-1 includes a quasi-cross-shaped metal structure A and four centrally symmetrical rectangular metal structures B1, B2, B3 , B4, the quasi-cross-shaped metal structure A includes a horizontal metal strip structure A1 and a vertical metal strip str...

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Abstract

The invention discloses a dual-polarization broadband multifunctional active wave-absorbing / reflecting device, which comprises a plurality of super-units which are periodically arranged, wherein each super-unit comprises four basic units which are arranged in a 2*2 matrix form, two basic units in the same horizontal direction are in a 90-degree rotation relation, two basic units in central symmetry are identical, every two adjacent basic units are connected through a chip inductor, each basic unit comprises a top-layer active frequency selection surface and a bottom-layer metal ground, and an air matching layer is arranged between each top-layer active frequency selection surface and the corresponding bottom-layer metal ground. The dual-polarization broadband multifunctional active wave-absorbing / reflecting device has the advantages of multiple functions, dual polarization, wide frequency band and the like, and has a wide application prospect in important fields such as intelligent stealth systems and the like.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic metamaterials, in particular to a dual-polarization broadband multifunctional active wave absorber / reflector. Background technique [0002] Microwave absorbers have been studied quite extensively because of their important role in anti-radar camouflage applications. The traditional Salisbury screen can absorb electromagnetic waves in a narrow frequency band by placing a resistive surface at a quarter wavelength above the metal ground. The Jaumann wave absorber can increase the absorption bandwidth by cascading multiple layers of resistive surfaces. , but the section thickness of the structure will increase accordingly. [0003] Designing the absorber based on the Frequency Selective Surface (FSS) can not only effectively reduce the section thickness, but also effectively improve the absorbing performance. Furthermore, designing the absorber based on the active frequency selective surface...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/00H01Q17/00
CPCH01Q15/0086H01Q15/0026H01Q15/002H01Q17/007
Inventor 李黄炎吴文
Owner NANJING UNIV OF SCI & TECH
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