A 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 electromagnetic metamaterial loading, which realizes ±60° scanning of E plane and ±45° scanning of H plane in a wide frequency band of 0.5-2GHz. Its profile height is only 1 / 13 of the low-frequency wavelength, and the new resistive electromagnetic metamaterial loaded at the same time significantly reduces the out-of-band RCS of the antenna itself in the ultra-wide frequency range outside the operating frequency band without affecting the radiation performance of the antenna itself. . The entire antenna structure mainly includes: the coaxial feeding structure of the antenna; two grounded metal columns for suppressing common mode resonance; an aluminum material floor with a certain thickness; Printed connected long-slot antenna elements with strong coupling effect; dielectric substrates for supporting the entire phased array antenna system structure; foam layers for supporting dielectric substrates loaded with resistive electromagnetic metamaterials; circles with ultra-broadband wave absorption Form resistive material.

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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