Low profile low RCS ultra wide band wide-angle scanning strong mutual coupling phased array antenna based on polarization conversion metamaterial

Abstract

The invention discloses a low profile low RCS ultra wide band wide-angle scanning strong mutual coupling phased array antenna based on a polarization conversion metamaterial. The antenna can achieve two-dimensional wide-angle scanning in four octaves with a profile height of only 0.267 times of the high-frequency wavelength, the low profile requirement of the antenna is met, and meanwhile the RCS of the antenna is effectively reduced under the premise that the new polarization conversion material loaded does not affect the radiation performance of the antenna. The whole antenna structure mainly comprises a dielectric substrate (1), an interdigital dipole unit (2) printed on the dielectric substrate; rectangular patches (3) on both sides of the dipole; a strip line Balun (4) under the dielectric substrate of the antenna for connecting an antenna and a floor; a dielectric layer (6) below of the balun and having a metal floor layer (5) on the upper surface; a polarization conversion metamaterial (7) which is loaded on the metal floor; (8) a centimeter network on the lower surface of the dielectric layer; and a microwave coaxial cable (9) fed to the centimeter network.

Description

technical field [0001] The invention belongs to the technical field of antenna engineering, and in particular relates to an ultra-wideband-dimensional scanning phased antenna array system, specifically a system based on a strong mutual coupling effect and loaded with a new type of polarization conversion metamaterial (PCM). At the same time, it has the characteristics of low profile and low RCS, and can realize the phased antenna array of ultra-wide bandwidth angular scanning. It is suitable for the platform that requires good antenna stealth performance and low profile characteristics, and can realize ultra-wide bandwidth angular scanning. Background technique [0002] As an important part of the modern military field, stealth technology is also an important research direction in the current field of antenna technology. Radar Cross Section (Radar Cross Section), referred to as RCS, is a measure of the return scattering power of a target in a given direction under the illumi...

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Problems solved by technology

On the one hand, in order to achieve ultra-wide bandwidth angular scanning, the height of the antenna profile of the strong mutual coupling antenna is strictly restricted, and realizing the low profile of the antenna is one of the difficulties of this type of array antenna; The research on the scattering characteristics of this new type of broadband phased array antenna with strong mutual coupling effect is still very little, and it is basically in its infancy, and the low RCS design for this type of array antenna is still in the blank stage

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