Metasurface-based convex conformal cassegrain vortex field antenna

A metasurface and vortex field technology, applied in antennas, electrical components, waveguide horns, etc., can solve the problems of complex configuration, large phase error, loading, etc., and achieve the effects of high-efficiency excitation, low cost, and precise phase compensation
CN108808248AActive Publication Date: 2018-11-13XIDIAN UNIV
3 Cites 6 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XIDIAN UNIV
Publication Date
2018-11-13

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a metasurface-based convex conformal cassegrain vortex field antenna, and mainly aims to solve the problems that the existing antenna is high in phase error, low in radiation gain, and hard to realize convex vortex field antenna beam calibration. The metasurface-based convex conformal cassegrain vortex field antenna comprises a carrier (1), a main reflecting mirror (2), anauxiliary reflecting mirror (3), a feed source (4) and a supporting structure (5); the carrier adopts a convex structure; the main reflecting mirror is conformal with the carrier; each of the main reflecting mirror and the auxiliary reflecting mirror adopts a phase change metasurface structure; the main reflecting mirror is of a convex structure, wherein the main reflecting mirror comprises a maindielectric layer, a main reflecting layer and a plurality of main phase regulating and controlling layers, wherein the multiple main phase regulating and controlling layers are uniformly arranged, and are composed of main metal ring microstructures which are integrally distributed in a spiral shape and are used for generating vortex electromagnetic waves; and the supporting structure is connectedwith the main reflecting mirror and the auxiliary reflecting mirror. By virtue of the metasurface-based convex conformal cassegrain vortex field antenna, wave beam calibration of the convex cassegrain vortex field antenna can be realized, and vortex electromagnetic waves can be efficiently excited; and meanwhile, the antenna phase compensation error is lowered, the structure is simple, and the antenna can be used for communication and radar.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of antennas, in particular to a Cassegrain vortex field antenna which can be used for communication and imaging. technical background

[0002] In recent years, the demand for communication capacity has increased sharply, and vortex electromagnetic wave communication has become the focus of people's research because of its good orthogonality in different modes, which can form a large number of same-frequency multiplexing channels, and greatly improve spectrum utilization and communication capacity. . On the other hand, in the field of SAR imaging, in order to obtain 3D imaging with higher resolution and better signal-to-noise ratio, multiple emission sources are required to detect the same target from different angles, which significantly increases the cost and complexity of the system. The vortex electromagnetic wave itself carries continuously changing angle information, that is, a vortex field antenna can...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More