Frequency selective surface electromagnetic wave transmission amplitude modulator on basis of graphene

Abstract

The invention discloses a frequency selective surface electromagnetic wave transmission amplitude modulator on the basis of graphene. The frequency selective surface electromagnetic wave transmissionamplitude modulator comprises a frequency selective surface, a dielectric layer and a graphene sandwich layer. The frequency selective surface, the dielectric layer and the graphene sandwich layer aresequentially arranged in a stacked manner, the graphene sandwich layer comprises an upper graphene thin film layer, a lower graphene thin film layer and an ionic liquid layer, the ionic liquid layeris arranged between the upper graphene thin film layer and the lower graphene thin film layer, and contact electrodes are arranged on the upper graphene thin film layer and the lower graphene thin film layer and are connected with a positive electrode and a negative electrode of a power source. The frequency selective surface electromagnetic wave transmission amplitude modulator has the advantagesthat the frequency selective surface and graphene sandwich structures are combined with one another, accordingly, the electromagnetic properties of the frequency selective surface can be dynamicallyregulated and controlled, and voltages required during regulation and control can be lowered.

Description

technical field [0001] The invention relates to the technical field of target microwave electromagnetic feature regulation and radar stealth, mainly relates to electromagnetic wave space filtering and regulation of transmission amplitude, in particular to a frequency selective surface electromagnetic wave transmission amplitude modulator based on graphene. Background technique [0002] The frequency selective surface is composed of a series of metal structural units arranged periodically, and its shape is various, which can be roughly divided into central connection type, ring type, solid type and composite unit structure. When the frequency of the incident electromagnetic wave is the resonant frequency of the frequency selective surface, it will show a transmission characteristic of total reflection or total transmission, which allows the frequency selective surface to act as a spatial filter to modulate the incident electromagnetic wave. [0003] At present, in order to ac...

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Problems solved by technology

[0006] It can be seen from the above that the existing graphene-based electromagnetic wave amplitude modulation devices are all reflection control, and require electromagnetic coupling between the metal base plate and the frequency selective surface to achieve frequency selection, and its control effect and practicability are greatly affected.

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