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Lens antenna

A technology of lens antenna and axis, applied in the direction of antenna, electrical components, etc., can solve the problem of weak directivity of lens antenna

Active Publication Date: 2019-04-05
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the defect of weak directivity of traditional lens antennas, researchers have proposed a lens antenna based on metamaterials. For example, Aghanejad I et al. published an article entitled "A high-gain Lens antenna based on transformation optics” paper discloses a high-gain lens antenna based on transformation optics, including a feed source and a hemispherical structure. The feed source is located at the spherical apex of the hemispherical structure. Plane waves are used to enhance the directivity of the lens antenna. This structure can only achieve directivity enhancement and does not have the illusion effect of optical devices.

Method used

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Experimental program
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Effect test

Embodiment 1

[0020] Embodiment 1, the distance from the imaginary vertex A of the hemispherical structure 3 to the intersection point B of the curved surface of the concave structure and the axis X in this embodiment is d=0.5r.

[0021] refer to figure 1 , a lens antenna, comprising a point light source 1, a spherical structure 2 with a radius of r and a hemispherical structure 3 with a radius of R, where r1 Along the direction from the spherical surface of the hemispherical structure 3 and the concave structure to the virtual sphere center O, the distance from the virtual vertex A of the hemispherical structure 3 to the intersection point B of the curved surface of the concave structure and the axis x is d, d=0.4 r~0.6r; the point light source 1 is set inside the spherical structure 2, and the central axis of the spherical wave emitted by the point light source 1 coincides with the axis X, and the luminous point of the point light source 1 is located at the virtual vertex A of the hemisphe...

Embodiment 2

[0040] Embodiment 2, the structure of this embodiment is the same as that of Embodiment 1, only the distance from the imaginary vertex A of the hemispherical structure 3 to the intersection point B of the curved surface of the concave structure and the axis X is adjusted: d=0.4r.

Embodiment 3

[0041] Embodiment 3, the structure of this embodiment is the same as that of Embodiment 1, only the distance from the imaginary vertex A of the hemispherical structure 3 to the intersection point B of the curved surface of the concave structure and the axis X is adjusted: d=0.6r.

[0042] The technical effects of the present invention will be described in detail below in combination with simulation experiments.

[0043] 1. Simulation conditions and content:

[0044] The following simulation experiments are carried out based on the three embodiments of the present invention, all using COMSOL Multiphysics 5.2 multi-physics simulation software to complete.

[0045] Simulation 1, the electric field of three embodiments has been simulated, and the results are as follows image 3 shown.

[0046] Simulation 2, simulated the direction diagrams of the three embodiments, the results are as follows Figure 4 shown.

[0047] 2. Simulation result analysis:

[0048] refer to image 3 ...

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Abstract

The invention provides a lens antenna and aims to ensure the directional effect of the lens antenna and realize the illusion effect of an optical device. The lens antenna includes a point light source, a spherical structure with a radius r and a hemispherical structure with a radius R. Both the spherical structure and the hemispherical structure adopts left-handed materials, the spherical surfaceof the hemispherical structure is provided with a concave structure, the curved surface of the concave structure and the spherical surface of the spherical structure have the same radius of curvature,the spherical structure is nested in the concave structure of the hemispherical structure and is closely attached to the curved surface of the concave structure, the refractive index of the sphericalstructure gradually increases with the same spherical form as the spherical bending direction of the hemispherical structure along the positive direction of an axis X passing a center O' of the spherical structure and a virtual center O of the hemispherical structure, the refractive index of the hemispherical structure gradually increases in a direction from the spherical surface and concave structure surface of the hemispherical structure to the virtual center O, the point light source is in the spherical structure, and a luminous point is located at a virtual vertex A of the hemispherical structure.

Description

technical field [0001] The invention belongs to the field of wireless communication, in particular to a lens antenna. Background technique [0002] A lens antenna is an antenna that can pass through electromagnetic waves and convert spherical waves from point sources or cylindrical waves from line sources into plane waves to obtain pencil-shaped, fan-shaped or other shaped beams. In a microwave communication system, the index that characterizes the lens antenna mainly has directionality. In order to improve the defect of weak directivity of traditional lens antennas, researchers have proposed a lens antenna based on metamaterials. For example, Aghanejad I et al. published an article entitled "A high-gain Lens antenna based on transformation optics” paper discloses a high-gain lens antenna based on transformation optics, including a feed source and a hemispherical structure. The feed source is located at the spherical apex of the hemispherical structure. Plane waves are use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/00H01Q19/06
CPCH01Q15/0086H01Q19/06
Inventor 安翔吕志清王军军王英飞单孝通
Owner XIDIAN UNIV