Multi-beam highly directional three-sided angle reflector antenna based on metasurface

Abstract

The invention provides a metasurface-based multi-beam high-orientation trihedral corner reflector antenna. The invention aims to realize multi-beam directional radiation and effectively weaken scattering intensity. The metasurface-based multi-beam high-orientation trihedral corner reflector antenna includes a metal bottom plate, a dielectric plate, a plurality of right-angled isolation plates anda plurality of spherical wave feed sources; the dielectric plate and the metal bottom plate form an upper-and-lower laminated structure; the right-angled isolation plate comprises a right-angled metalplate and right-angled dielectric plates attached to two side surfaces of the right-angled metal plate; symmetrical metal ring structures arranged periodically are printed on the upper surface of thebottom surface dielectric plate and the outer surfaces of the two side surface dielectric plates; the metal rings provide phase compensation for incident waves, so that the calibration of outgoing plane waves can be realized; the plurality of isolation plates and the bottom surface dielectric plate form a plurality of trihedral corner reflection surface units of the same structure; and the spherical wave feed sources are arranged beside the center positions of the aperture surfaces of the reflection surface units and are fixed by three supporting rods connected to the three vertices of the aperture surface of each reflection surface unit. With the metasurface-based multi-beam high-orientation trihedral corner reflector antenna of the invention adopted, the directional radiation of four beams, five beams and six beams can be realized.

Description

Technical field [0001] The invention belongs to the technical field of antennas, and relates to an angled reflector antenna, in particular to a metasurface-based four-beam, five-beam and six-beam high-directional three-sided angled reflector antenna, which can be used in the field of wireless communication and radar. [0002] technical background [0003] Multi-beam antenna technology can cover a wide range of transmission areas with high gains. The demand for satellite communications, radar reconnaissance, electronic countermeasures, and microwave transmission continues to expand. It has become the next-generation satellite antenna, multi-target tracking radar and global electronic countermeasure system. Important development direction. [0004] For highly directional multi-beam antennas, antenna design and beam design are not only the difficulties of its design, but also key technologies. Due to its special three-dimensional planar structure, the angled reflector has natural advan...

AI Technical Summary

Problems solved by technology

However, since there is no specific radiation focus on the angled reflector, the radiation beam emitted from the feed antenna cannot be well calibrated, and the gain improvement is extremely limited

On the other hand, the angle design of the reflective surface will also cause strong backscattering

For example, in 2013, Qu Shaobo and others published "Design of a New Dihedral Reflector Loaded with Metamaterial Absorber" in "Journal of Air Force Engineering University" (Natural Science Edition) (No. 6), and in "Electronic "Components and Materials" (No. 10) published "A New Trihedral Reflector Design Loaded with Metamaterial Absorbers", which effectively reduces the scattering characteristics of the reflective surface by using the metamaterial absorber structure, but does not consider reflection The radiation problem of the planar antenna, and the multi-beam construction is not involved

In 2015, the application publication number was CN 104682012 A, and the patent application titled "High-gain low-scattering angle reflective surface loaded with gradient corrugation" disclosed a high-gain low-scattering angle reflective surface loaded with gradient corrugation. A set of metal corrugated structures with gradual changes in height is loaded on the angled reflective panel, which simply and effectively calibrates the spherical wave of the feed source to emerge as a plane wave, thereby effectively improving the radiation gain and greatly reducing the backscattering characteristics of the antenna. However, this invention only It is effective for a single dihedral angle reflector structure, but cannot be applied to a three-dimensional angle reflector, and does not consider the performance improvement of multi-beam antennas

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