High-gain dual-frequency circularly polarized antenna based on metasurface

A circularly polarized antenna and high-gain technology, applied in the field of high-gain dual-frequency circularly polarized antennas, can solve the problems of inability to achieve beam adjustment and large antenna size

Pending Publication Date: 2019-08-20
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Lens reflector antennas are similar. Usually, feeders are used to irradiate dielectric spheres, dielectric cakes, etc. to focus the beam and achieve high-gain irradiation. However, like reflector antennas, the size of the antenna is too large to achieve beam adjustment.

Method used

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  • High-gain dual-frequency circularly polarized antenna based on metasurface
  • High-gain dual-frequency circularly polarized antenna based on metasurface
  • High-gain dual-frequency circularly polarized antenna based on metasurface

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] refer to figure 1 , the antenna described in the present invention is a single-port feed multilayer structure, and its working frequency bands are K-band and Ka-band. It includes a first dielectric substrate 1, and a stacked structure composed of a second dielectric substrate 2 and a third dielectric substrate 3 arranged from bottom to top. The metal layer of the antenna includes a microstrip loop feeder 4 and a grounding circuit with a cross slot 6. Plane 5 and metasurface 7, the lower surface of the first dielectric substrate 1 is a microstrip ring feeder 4 for feeding, the upper surface of the first dielectric substrate 1 is a T-shaped structure with a cross slot 6, the second The dielectric substrate 2 is located between the grounded metal layer and the third dielectric substrate 3, and its function is equivalent to an adhesive. The upper su...

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PUM

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Abstract

The invention discloses a high-gain dual-frequency circularly polarized antenna based on a metasurface. The working frequency bands are a K wave band and a Ka wave band. A metal layer of the antenna comprises a micro-strip ring feeder line, a grounding plane with a cross slot and a metasurface. The micro-strip ring feeder line at the lowest position is coupled with the slotted grounding plane at the middle position. The electromagnetic wave energy is coupled to the metasurface of the uppermost layer and is radiated out. The sequential rotation structure of the micro-strip ring feeder line cangenerate a phase difference of 90 degrees so as to excite circular polarization. According to the feed structure, a wide axial ratio bandwidth can be realized; the metasurface can influence the axialratio bandwidth and gain of high and low frequency bands; the gain of the antenna in two frequency bands is greater than 5dBic; and the single-port feed dual-frequency circularly polarized antenna hasgood radiation characteristics in two frequency band bands, and is compact in structure and easy to process, so that antenna has a good application prospect in a wireless communication system.

Description

technical field [0001] The invention belongs to the technical fields of optics / microwave, wireless communication and test simulation, and in particular relates to a metasurface-based high-gain dual-frequency circularly polarized antenna. Background technique [0002] With the progress of the society, the communication information service continues to develop. In order to improve the communication rate of the communication system, the current communication frequency band is increasingly developing towards the high frequency band, especially in the K and Ka bands. Working in these two frequency bands requires antennas to be small in size, Gain and other related characteristics. Due to some problems such as electromagnetic compatibility, people usually hope that an antenna can "integrate" multiple operating frequency bands, so that the same antenna can be shared in many cases. Therefore, the dual-frequency or even multi-frequency circular polarization technology of the antenna...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/36H01Q1/38H01Q1/50H01Q13/08H01Q13/10
CPCH01Q1/36H01Q1/38H01Q1/50H01Q13/08H01Q13/10
Inventor 张睿盼翟国华其他发明人请求不公开姓名
Owner EAST CHINA NORMAL UNIV
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