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X-band high-gain broadband lens antenna based on phase gradient multilayer super-surface structure

A technology of lens antenna and phase gradient, which is applied in the direction of antenna, antenna coupling, antenna grounding device, etc., can solve the problems of narrow antenna bandwidth and reduced antenna gain, and achieve the effects of low production cost, reduced size, and high antenna gain

Inactive Publication Date: 2019-02-26
CHINA UNIV OF MINING & TECH
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Problems solved by technology

However, the antenna bandwidth of these structures is narrow, and the realization of low profile is at the expense of the reduction of antenna gain.

Method used

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  • X-band high-gain broadband lens antenna based on phase gradient multilayer super-surface structure
  • X-band high-gain broadband lens antenna based on phase gradient multilayer super-surface structure
  • X-band high-gain broadband lens antenna based on phase gradient multilayer super-surface structure

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Embodiment Construction

[0025] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0026] An X-band transparent high-gain broadband lens antenna based on a phase gradient multilayer metasurface structure, including a feed antenna and a lens.

[0027] The feed antenna is composed of an upper and lower two-layer structure, the upper layer is composed of a rectangular radiation patch and a dielectric layer, the bottom part is composed of an H-shaped slot, a microstrip line and a dielectric layer, and a certain height is between the upper and lower parts. An air gap, the feed antenna feeds in a coupling manner through an H-shaped slot using a microstrip line.

[0028] figure 1 A schematic diagram of the structure of the microstrip antenna based on the H-shaped slot coupling as the feed is given. A rectangular patch antenna with a microstrip line coupled and fed through an H-shaped slot is used as the feed antenna of ...

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Abstract

The invention discloses an X-band high-gain broadband lens antenna based on a phase gradient multilayer super-surface structure. The antenna exhibits a broadband characteristic by using a microstrip antenna based on H-type slot coupling as a feed source. Furthermore, a super-surface structural unit having a phase gradient variation feature is designed and arranged in accordance with a parabolic focusing equation. Therefore, good low profile characteristics are obtained. A combined super-surface transmission array can convert a normally incident quasi-spherical wave into a plane wave, thereby obtaining a high-gain antenna. The lens antenna operates in the X-band with a center frequency of 10 GHz and the relative bandwidth reaches 20.6%. The antenna gain can be increased from 8.25 dB to 18.98 dB, and the side-lobe level of the super-surface focusing is less than -14.3dB. The simple three-dimensional structure and compact size provide a new method for implementing high-gain antennas, andthe antenna is good in application prospect in field of long-distance wireless communication.

Description

technical field [0001] The invention relates to the technical field of microwave antennas, in particular to an X-band high-gain broadband lens antenna based on a phase gradient multilayer metasurface structure. Background technique [0002] X-band high-gain broadband lens antenna plays an important role in the field of wireless communication systems, especially in the field of satellite communication. Various design methods of this antenna have been extensively studied by predecessors. For example, a circularly polarized high-gain antenna based on a metasurface reflector has been developed, which obtains a gradient phase change by controlling the rotation angle of the metasurface element; a monolithic antenna with eight discrete phase states has also been developed. layer metasurface structure antenna, this method is easy to design and implement, but sacrifices a certain radiation efficiency; in addition, a transmissive metasurface based on a rectangular metal double ring h...

Claims

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Application Information

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IPC IPC(8): H01Q19/06H01Q1/52H01Q1/50H01Q1/48H01Q1/38H01Q15/02
CPCH01Q1/38H01Q1/48H01Q1/50H01Q1/52H01Q15/02H01Q19/062
Inventor 张祥军张浩陈一鸣严嘉
Owner CHINA UNIV OF MINING & TECH
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