Circularly polarized antenna array with sequentially rotated feed network

A circularly polarized antenna and feeding network technology, applied in antenna arrays, specific array feeding systems, independent antenna unit combinations, etc., can solve the problems of narrow impedance bandwidth and axial ratio bandwidth, and achieve wide axial ratio bandwidth , the effect of wide impedance bandwidth

Inactive Publication Date: 2020-02-14
NANJING UNIV OF INFORMATION SCI & TECH
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing circularly polarized microstrip antennas often have narrow impedance bandwidth and axial ratio bandwidth, and there is still room for improvement

Method used

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  • Circularly polarized antenna array with sequentially rotated feed network
  • Circularly polarized antenna array with sequentially rotated feed network
  • Circularly polarized antenna array with sequentially rotated feed network

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Embodiment Construction

[0026] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings, and this embodiment does not constitute a limitation to the present invention.

[0027] A circularly polarized antenna array with a sequential rotating feed network, such as figure 1 and figure 2 As shown, including the dielectric substrate, the substrate is an FR4 substrate (thickness 1.6mm) with a relative permittivity of 4.4 and a loss tangent of 0.02. The overall size of the antenna array is .

[0028] like figure 2 As shown, four antenna units are printed on the four corners of the front of the dielectric substrate; the antenna units include square patches, and each antenna unit patch is printed on On the FR4 dielectric substrate, there is an elliptical groove on the patch. By changing the size of the unit patch, the size of the major axis and the minor axis of the elliptical groove, and the angle between the major axis ...

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Abstract

The invention discloses a circularly polarized antenna array with a sequentially rotated feed network, belonging to the technical field of antennas. The circularly polarized antenna array comprises adielectric substrate, wherein the front surface of the dielectric substrate is provided with four antenna units; each antenna unit comprises a patch; an elliptical groove is formed in each patch; eachantenna unit is allowed to cover frequency band ranges of different impedance bandwidths and axial ratio bandwidths by changing the size of the patch of the unit, the sizes of a long axis and a shortaxis of the elliptical groove and an included angle between the long axis of the elliptical groove and one side edge of the patch; the antenna units are connected to the sequentially rotated feed network; the sequentially rotated feed network is connected to a ground plane; and the ground plane is located on the back surface of the dielectric substrate. Since the antenna units working in different frequency bands are connected with the sequentially rotated feed network to form an antenna array, so a circularly polarized array antenna with a small size, low profile, and wide impedance bandwidth and axial ratio bandwidth is obtained.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a circularly polarized antenna array with a sequential rotating feed network. Background technique [0002] In recent years, circularly polarized microstrip antennas have become very attractive in many applications such as radar, navigation, mobile satellite, and wireless communications because of their well-known advantages, such as small form factor, light weight, and easy compatibility with integrated circuits , greater flexibility in the orientation angle between the transmitter and receiver compared to linearly polarized antennas, etc. With the development of modern technology and microstrip antenna technology, the performance requirements of circularly polarized antennas in modern wireless communications are getting higher and higher. Due to the advantages of compact structure, light weight, and high gain, circularly polarized microstrip antenna arrays, It has important a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q1/48H01Q1/50H01Q21/00H01Q21/30
CPCH01Q1/38H01Q1/48H01Q1/50H01Q21/0006H01Q21/30
Inventor 杨凌升徐诗豪杨乐
Owner NANJING UNIV OF INFORMATION SCI & TECH
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