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Small-size fractal-fork anti-metallic tag antenna loaded with split-ring resonators

An anti-metal tag, split resonant ring technology, applied in the field of Internet of Things, can solve the problems of increasing the size of the antenna, inconvenient to popularize and apply the antenna, etc., and achieve the effect of reducing the size, increasing the bandwidth, and widening the bandwidth.

Inactive Publication Date: 2014-04-02
HANGZHOU RFID RES CENT CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the ways to realize the anti-metal of the tag antenna mainly include the use of artificial magnetic surface (AMC) and electronic band gap (EBG) structure, or adjusting the distance between the tag and the metal plate and modifying the traditional antenna, etc., but this will increase the The size of the antenna is not convenient for the promotion and application of the antenna

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  • Small-size fractal-fork anti-metallic tag antenna loaded with split-ring resonators
  • Small-size fractal-fork anti-metallic tag antenna loaded with split-ring resonators
  • Small-size fractal-fork anti-metallic tag antenna loaded with split-ring resonators

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0022] like Figure 1-2 As shown, the small-sized anti-metal fractal tree branch tag antenna of the present invention includes from top to bottom: a pair of feed sources loaded on a parallel resonant ring inside a typical T-shaped matching, a deformed fractal tree branch dipole 101, and a dielectric plate 201 , The lower metal reflectors 301 and 00 are the positions for placing chips, and the whole structure has no through holes.

[0023] Wherein the top layer is the feed source and the deformed fractal tree branch dipole 101 of the parallel resonant ring loaded inside the typical T-shaped matching and is located on the dielectric plate 102, wherein the width of the bending line before the tree branch is 0.6mm, and the branch of the tree branch Th...

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Abstract

The invention relates to a small-size fractal-fork anti-metallic tag antenna loaded with split-ring resonators. The antenna sequentially comprises a top layer, a medium plate and a metal reflecting plate from top to bottom, wherein the top layer is provided with a forked branch knot and has a matched structure. The invention provides the small-size anti-metallic fractal-fork tag antenna with the bandwidth covering the whole global ultrahigh-frequency band, and a feeding structure is a T-shaped matched structure loaded with a pair of parallel split-ring resonators; thus, the bandwidth of the antenna can be increased; the reflecting plate is added to the back of the medium plate to mainly achieve an anti-metallic purpose; a deformed fractal-fork dipole radiator is adopted to increase the bandwidth of the antenna while decreasing the size.

Description

technical field [0001] The invention relates to the field of the Internet of Things, in particular to a branch fractal anti-metal tag antenna in radio frequency identification technology. Background technique [0002] As a non-contact automatic identification technology, Radio Frequency Identification (RFID) technology uses radio frequency signals to achieve non-contact information transmission through spatial coupling (alternating magnetic field or electromagnetic field) and achieve the purpose of identification through the transmitted information. Compared with other identification technologies, radio frequency identification technology has many advantages, especially with the rapid development of electronic technology and the continuous improvement of manufacturing technology, the development of radio frequency identification technology realized by the principle of wireless radar is very rapid. , manufacturing, anti-theft technology, identification technology and medical ...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q19/10H01Q1/52H01Q1/50
Inventor 贺连星赵学田汪明健商巍
Owner HANGZHOU RFID RES CENT CHINESE ACAD OF SCI