Single-feed circularly polarized RFID reader-writer antenna

A technology of circular polarization and reader-writer, which is applied in the direction of antenna, resonant antenna, electric short antenna, etc., can solve the problems of narrow circular polarization working bandwidth and limited application of single-feed circularly polarized microstrip antenna, so as to increase the effective Effects of radiation area, improved impedance matching performance, and simple structure

Active Publication Date: 2020-10-16
DALIAN MARITIME UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The single-feed circularly polarized microstrip antenna has the characteristics of simple structure, easy processing and fabrication, but the circular polarization working bandwidth of the single-feed circularly polarized microstrip antenna is narrow, which limits its application.

Method used

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  • Single-feed circularly polarized RFID reader-writer antenna
  • Single-feed circularly polarized RFID reader-writer antenna
  • Single-feed circularly polarized RFID reader-writer antenna

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Embodiment Construction

[0021] In order to make the technical solutions and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the drawings in the embodiments of the present invention:

[0022] like Figure 1 to Figure 3 A single-feed circularly polarized RFID reader antenna shown specifically includes a radiation patch 1 , a ground probe 2 , an FR4 dielectric plate 3 , a perturbation ring patch 4 , a coaxial connector 5 and a metal floor 6 .

[0023] The radiation patch 1 includes a square patch 11 and four 270-degree fan-shaped patches 12, the FR4 dielectric board 3 includes an upper dielectric board 31 and a lower dielectric board 32, and the upper dielectric board 31 and the lower dielectric board 32 There is an air gap between them, and the square patch 11 and four 270-degree fan-shaped patches 12 are located on the upper surface of the upper dielectric board 31; the fo...

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Abstract

The invention discloses a single-feed circularly polarized RFID reader-writer antenna, which comprises radiation patches, a grounding probe, an FR4 dielectric plate, a perturbation ring patch, a coaxial connector and a metal floor, the radiation patches comprise a square patch and four 270-degree fan-shaped patches, and are positioned on the upper surface of an upper dielectric plate; the four 270-degree fan-shaped patches comprise a first fan-shaped patch, a second fan-shaped patch, a third fan-shaped patch and a fourth fan-shaped patch, and the circle centers of the four fan-shaped patches coincide with the four right-angle vertexes of the square patch respectively. According to the single-feed circularly polarized RFID reader-writer antenna, by introducing the perturbation ring patch, the impedance matching performance of the antenna is improved, and the circular polarization bandwidth of the antenna is broadened; the gain of the antenna is improved by adopting the grounding probe;in addition, the antenna has the characteristics of the simple structure, low cost, the light weight and the like, and is very suitable for application of ultrahigh frequency radio frequency identification reader-writer antennas in China and multiple countries.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a single-feed circularly polarized RFID reader-writer antenna. Background technique [0002] With the development of communication technology and Internet technology, information technology is rapidly changing people's lives. The Internet of Things is the exchange and communication of information through the combination of information sensing devices such as radio frequency identification (Radio Frequency Identification, RFID), infrared sensors, wireless sensing technology, laser scanners, and global positioning systems with the Internet. As one of the key technologies of the Internet of Things, RFID is a technology that uses the transmission characteristics of wireless electromagnetic signals and the principle of spatial coupling to realize non-contact identification. RFID has the characteristics of strong anti-interference ability, long service life, large storage information...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/22H01Q1/36H01Q1/38H01Q1/48H01Q1/50H01Q9/04
CPCH01Q1/2216H01Q1/36H01Q1/38H01Q1/48H01Q1/50H01Q9/0407H01Q9/0428
Inventor 王钟葆王雅楠马军帅房少军刘宏梅傅世强
Owner DALIAN MARITIME UNIVERSITY
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