Low RCS ultra-wideband connected long slot antenna array based on resistive metamaterial loading

Abstract

The invention discloses a low RCS ultra-wideband connected-long-slot antenna array based on resistive metamaterial loading. The low RCS ultra-wideband connected-long-slot antenna array realizes E-plane + / -60-degree scanning and H-plane + / -45-degree scanning within a wide frequency band of 0.5-2 GHz, its profile height is only 1 / 13 of that of a low-frequency wavelength, and the loaded novel resistive electromagnetic metamaterial significantly reduces the out-of-band RCS of the antenna in an ultra-wide frequency range outside an operating band without affecting the radiation performance of the antenna. The whole antenna structure mainly comprises a coaxial feeding structure of the antenna, two grounding metal columns for suppressing common mode resonance, an aluminum material floor having acertain thickness, a gradual line Balun arranged under a dielectric substrate of the antenna and connecting the antenna and the floor, a printed connected-long-slot antenna unit with high coupling effect, the dielectric substrate for supporting the entire phased-array antenna system structure, a foam layer for supporting the dielectric substrate loaded with the resistive electromagnetic metamaterial, and a circular resistive material having an ultra-wideband absorbing function.

Description

technical field [0001] The invention belongs to the technical field of antenna engineering, and in particular relates to an ultra-wide bandwidth angle-scanning phased antenna array system. Specifically, it is based on a strong mutual coupling effect and loaded with a new wave-absorbing metamaterial (Metamaterial Absorber, MMA). Low RCS characteristics, phased antenna array that can realize ultra-wide bandwidth angular scanning. It is suitable for platforms that require antennas with good stealth performance and low profile characteristics, and can achieve ultra-wide bandwidth angular scanning. Background technique [0002] With the development of information warfare, especially the rapid progress of radar detection technology, stealth technology occupies an increasingly important position in modern electronic warfare. Radar Cross Section (Radar Cross Section), referred to as RCS, is an important indicator to measure the stealth performance of the detected target. The size ...

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Problems solved by technology

However, limited by the polarization method of the antenna itself and the working principle of the metamaterial polarized rotating surface, it acts on electromagnetic waves incident with a specific polarization, so the RCS reduction of this method is only when a single polarized electromagnetic wave is incident Has an obvious effect, but has no effect on incident electromagnetic waves of another polarization

[0008] In addition, in the Chinese patent "Improved low-profile low-scattering strong-coupling ultra-broadband phased array" with application number 201810200308.9, a design idea for the balance of radiation and scattering in the design of phased array antennas is proposed, but when evaluating its scattering In terms of characteristics, only the single station RCS when the co-polarized wave is incident vertically is considered, and the RCS reduction when the cross-polarized wave is incident is not considered, and the RCS reduction effect when the electromagnetic wave is obliquely incident at a large angle is not given.

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