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Broadband circularly polarized slot antenna

A slot antenna and circular polarization technology, which is applied in the field of slot antenna and broadband circular polarization slot antenna, can solve the problems of poor axial ratio characteristics and narrow frequency band, and achieve a wide 3dB axial ratio relative bandwidth, low axial ratio characteristics, Effect of Wide Impedance Bandwidth

Pending Publication Date: 2018-03-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a wideband circularly polarized slot antenna, which realizes good circularly polarized characteristics, has the advantages of simple design, small size, low cost, and good characteristics, and can solve the problem of existing microstrip circular The polarized antenna has a narrow frequency band and poor axial ratio characteristics

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  • Broadband circularly polarized slot antenna
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  • Broadband circularly polarized slot antenna

Examples

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Embodiment 1

[0034] like Figure 1 ~ Figure 3 As shown, this embodiment provides a broadband circularly polarized slot antenna, which includes a coaxial line 1 , a first dielectric substrate 2 and a second dielectric substrate 3 .

[0035] Both the first dielectric substrate 2 and the second dielectric substrate 3 are PCB boards with the same shape, a dielectric constant of 4.4, and a loss angle of 0.02. The processing technology is mature, the cost is low, the yield is high, and the manufacturing process is simple. In the embodiment, the first dielectric substrate 2 is located above the second dielectric substrate 3 , and the projections of the first dielectric substrate 2 and the second dielectric substrate 3 can overlap on the horizontal plane.

[0036] like image 3 and Figure 4 As shown, the upper surface of the first dielectric substrate 2 is provided with a disc structure 4, the disc structure 4 is a circular metal patch printed on the upper surface of the first dielectric substr...

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Abstract

The invention discloses a broadband circularly polarized slot antenna comprising a coaxial line, a first dielectric substrate and a second dielectric substrate. The top surface of the first dielectricsubstrate is provided with a disk structure. The top surface of the second dielectric substrate is provided with a sequential phase shift structure. The bottom surface of the second dielectric substrate is provided with four radiation gaps fed by the sequential phase shift structure. The inner conductor of the coaxial line passes through the second dielectric substrate to be connected with the starting point of the sequential phase shift structure, and passes through the first dielectric substrate to be connected to the disk structure. The outer conductor of the coaxial line is connected to the bottom surface of the second dielectric substrate. The broadband circularly polarized slot antenna realizes good circular polarization characteristics, has the advantages of simple design, small size, low cost and good characteristics, and can solve the problem that a conventional microstrip circularly polarized antenna has a narrow frequency band and a poor axial ratio characteristic.

Description

technical field [0001] The invention relates to a slot antenna, in particular to a broadband circularly polarized slot antenna, which belongs to the technical field of wireless mobile communication. Background technique [0002] With the development of modern communication technology, pure linear polarization is difficult to meet the communication requirements. Circularly polarized antennas can receive incoming waves of any polarization, and their radiated waves can also be received by antennas of any polarization. It has the advantages of rotation orthogonality, ability to suppress cloud and rain interference, and anti-multipath reflection. Due to the superior performance of circularly polarized antennas in modern communications, more and more people pay attention to them. From the perspectives of portability, economy, RCS reduction, and EMC characteristics, it is often expected that only one antenna can be used to obtain the functions of multiple antennas, and the circula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q1/50H01Q15/24H01Q13/10
CPCH01Q1/38H01Q1/50H01Q13/10H01Q15/24
Inventor 涂治红贾凯歌陈达阳
Owner SOUTH CHINA UNIV OF TECH