metasurface lens antenna
A technology of lens antenna and metasurface, applied in the direction of antenna, waveguide horn, electrical components, etc., can solve the problems of complex structure, poor standing wave ratio, large volume, etc., and achieve the effect of small volume, small standing wave ratio and high gain
Active Publication Date: 2021-08-06
AIR FORCE UNIV PLA
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Problems solved by technology
However, the metamaterial unit structure that constitutes these lenses is often a three-dimensional block structure, which still has the defects of large volume, heavy weight, complex structure, and poor standing wave ratio.
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[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0025] The metasurface lens antenna of the present invention is a novel lens antenna based on beam-focusing metasurface loading. The antenna is realized by loading an ultra-thin transmissive beam-focusing metasurface on the aperture surface of a conical horn antenna. The transmissive beam-focusing metasurface is composed of It is composed of a plurality of transmissive linear polarization conversion unit structures. figure 1 It is a structural view of a transm...
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Abstract
The invention discloses a metasurface lens antenna, which belongs to the technical field of antennas. The metasurface lens antenna consists of a conical horn antenna and a subwavelength-thick beam-focusing metasurface. The beam-focusing metasurface is composed of a transmission-type linear polarization conversion unit structure array with a parabolic cross-polarization transmission phase spatial distribution. The structure of the transmission type linear polarization conversion unit is as follows from bottom to top: metal grid, dielectric substrate, metal elliptical split resonant ring, dielectric substrate and metal grid. The structural size and period of the transmission type linear polarization conversion unit can change the working frequency band, bandwidth, focusing efficiency and other characteristics of the beam focusing metasurface. The core component beam focusing metasurface in the metasurface lens antenna of the present invention is made of printed circuit board technology, with low cost, planar structure, sub-wavelength thickness, light weight, small volume, small standing wave ratio, narrow beam, and high gain. High advantages, can be designed and realized in any frequency band.
Description
technical field [0001] The invention relates to the technical field of antennas, in particular to a lens antenna based on a metasurface plane lens. Background technique [0002] A lens antenna is an antenna that can convert a point source or line source spherical wave or cylindrical wave into a plane wave through electromagnetic waves to obtain a pencil-shaped, fan-shaped or other shaped beam. It is widely used in microwave relay communication. By rationally designing the shape of the lens surface and the refractive index n, the phase velocity of the electromagnetic wave is adjusted to obtain a plane wavefront on the radiation aperture. The lens can be made of natural medium (n>1), and can also be made of artificial medium (n>1 or n<1) composed of metal mesh or metal plate. Traditional lens antennas, such as non-metallic dielectric lens antennas, artificial dielectric lens antennas, H-plane metal plate lens antennas, E-plane metal plate lens antennas, etc., genera...
Claims
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IPC IPC(8): H01Q19/08H01Q15/02H01Q15/24H01Q13/02
CPCH01Q13/02H01Q15/02H01Q15/242H01Q19/08
Inventor 李勇峰屈绍波韩亚娟张介秋陈红雅王甲富
Owner AIR FORCE UNIV PLA