An ultra-thin double-sided wave-absorbing frequency-selective metamaterial and its radome and antenna system

Abstract

The invention belongs to the technical field of a material and an antenna cover, in particular relates to an ultrathin frequency-selective metamaterial capable of wave absorption from two sides, an antenna cover and an antenna system. The ultrathin frequency-selective metamaterial capable of wave absorption from the two sides is virtually divided into a plurality of square unit structures arranged periodically, wherein each square unit structure comprises a dielectric substrate, a square annular resistance thin film and a comb-shaped frequency selective surface periodic structure, the square annular resistance thin film is attached onto the upper surface of the dielectric substrate, and the comb-shaped frequency selective surface periodic structure is attached onto the lower surface of the dielectric substrate. The antenna cover disclosed by the invention is used for covering the antenna system and comprises the above ultrathin frequency-selective metamaterial capable of wave absorption from the two sides. The antenna system comprises an antenna and the above antenna cover. With the metamaterial disclosed by the invention, favorable radiation characteristic of the antenna in a Ku wave band can be maintained, and the antenna can freely transmit and receive communication; and meanwhile, in an X wave band and a K wave band on the two sides of the Ku wave band, the metamaterial disclosed by the invention is provided with the resistance thin film with wave absorption characteristic taking a square metal patch layer as a grounding surface, and the wave incident to the antenna cover is absorbed.

Description

technical field [0001] The invention belongs to the technical field of materials and radome, and in particular relates to an ultra-thin double-sided wave-absorbing frequency-selective metamaterial, a radome, and an antenna system. Background technique [0002] Metamaterial is a kind of artificial periodic composite material, with the dielectric substrate as the substrate, and the metamaterial structural unit composed of metal foil, lumped resistor capacitor or resistor capacitor thin film and magnetic material is arranged on the dielectric substrate. When electromagnetic waves irradiate this special metamaterial, its electromagnetic properties change. Through the design of the unit structure, electromagnetic wave manipulation is realized to achieve the purpose of frequency selection, so that the metamaterial can realize different functions in specific frequency bands. [0003] The research on metamaterials with frequency selection function has been relatively in-depth, and h...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the defect that the existing composite metamaterial radome has a narrow wave-transmitting band and only forms absorbing characteristics on one side outside the wave-transmitting band, the design is complex and dense, and a Ku-band wave-transmitting, X-band and K-band absorbing composite metamaterials

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