Graphene-based ultra-wideband microwave dynamic adjustable wave-absorbing structure

Abstract

The invention discloses a graphene-based ultra-wideband microwave dynamic adjustable wave-absorbing structure, relates to the field of microwave dynamic adjustable wave-absorbing structures, and provides a graphene-based broadband radar wave dynamic adjustable wave-absorbing structure. The dynamic adjustable wave-absorbing structure is composed of a bottom metal layer, a lower dielectric layer, astructured square resistance layer, an upper dielectric layer and an electric control layer from the bottom up in sequence, wherein the electric control layer is composed of a graphene layer, an insulating dielectric layer infiltrated with the ionic liquid and a high-square-resistance thin film layer; and the square resistance of the graphene layer can be controlled through external bias adjustment, so that dynamic regulation of the full-waveband reflection coefficients of X, Ku and Ka can be realized. The method has the advantages that the dynamic regulation of the full-waveband reflection coefficients of X, Ku and Ka can be achieved through additional bias, switching of different reflection states can be realized under a condition that the structure is not changed, and in a certain state, the corresponding reflection coefficients are all less than 10 dB in all wavebands of X, Ku and Ka.

Description

technical field [0001] The invention relates to the field of microwave dynamically adjustable absorbing structures, in particular to a graphene-based ultra-wideband microwave dynamically adjustable absorbing structure. Background technique [0002] With the rapid development of modern electronic countermeasures and the continuous improvement of anti-stealth technology, the research on stealth materials and stealth technology has put forward higher and higher requirements. In-depth and extensive research has been carried out on various absorbing materials and absorbing structures. As a new research direction, the dynamically adjustable absorbing structure has better environmental adaptability, stronger stealth characteristics, and greatly improves the protection ability. At present, the commonly used external conditions include: mechanical adjustment, temperature control, illumination, and external bias to control the resonance characteristics of materials so as to realize t...

AI Technical Summary

Problems solved by technology

The currently proposed dynamically tunable absorbing devices have a series of shortcomings such as polarization correlation, narrow absorption bandwidth, and small dynamic adjustable range.

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