Highly Directional Umbrella Convex Convex Reflector Antenna Based on Metasurface

Abstract

The invention provides a high directivity umbrella convex conformal reflector antenna based on a super surface and mainly solves a problem that a convex mirror conformal to an umbrella convex carriercan not realize wave beam calibration. The antenna comprises the umbrella convex carrier, the umbrella convex mirror, a feed source, a coaxial conversion connector and a supporting structure, whereinthe umbrella convex mirror comprises an even-number-regular-n-edge planar polygon discrete super surface and m*n planar isosceles trapezoid discrete super surfaces which are spliced, the umbrella convex mirror is embedded on a convex surface of the umbrella convex carrier, the planar polygon discrete super surface and the planar isosceles trapezoid discrete super surfaces respectively comprise a medium substrate, a radiation floor and a resonance ring super surface, the resonance ring super surface is composed of resonance rings which are in different specifications and are arranged in a periodic two-dimensional linear mode, each resonance ring provides phase compensation for incident waves, wave beam calibration and pen-shaped wave beam synthesis of electromagnetic waves are realized through an any-curvature umbrella convex mirror, the feed source is fixed at the focus position of the umbrella convex mirror through the supporting structure, and feed is carried out through the coaxialconversion connector.

Description

technical field [0001] The invention belongs to the technical field of antennas, and relates to a reflector antenna, in particular to a highly directional umbrella-shaped convex conformal reflector antenna based on a metasurface, which realizes pencil-shaped beams and can be applied to fields such as wireless communication and target detection. [0002] technical background [0003] The high directivity of the reflector antenna makes it widely used in communication, radar and other aspects. However, the traditional reflector is generally designed as a concave paraboloid, which is difficult to conformally load on the convex surface of the spacecraft. For the traditional parabolic reflector, since the parabola has the property that the distance from any point on the parabola to the fixed focus is exactly equal to the perpendicular distance from the point to the fixed directrix, all waves emitted from the isotropic feed at the focus pass through After parabolic reflection, the ...

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Problems solved by technology

[0006] The above methods can effectively conformally design the concave mirror of the traditional reflector antenna into a flat mirror and calibrate the beam, but cannot solve the beam calibration problem of the convex mirror conformal to the umbrella-shaped convex carrier

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