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Circularly polarized RFID (Radio Frequency Identification Device) tag antenna

A technology of RFID tags and tag antennas, applied in the field of RFID, can solve problems such as receiving power loss, achieve large frequency bandwidth, reduce antenna size, and increase the effect of reading distance

Active Publication Date: 2013-03-06
SHENZHEN UNIV
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Problems solved by technology

[0015] In view of the shortcomings of the above-mentioned prior art, the present invention proposes a circularly polarized RFID tag antenna to solve the defects and deficiencies of the prior art, which can well solve the problem that the existing tag antenna and the reader antenna have different polarization modes. The problem of the loss of received power

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  • Circularly polarized RFID (Radio Frequency Identification Device) tag antenna
  • Circularly polarized RFID (Radio Frequency Identification Device) tag antenna
  • Circularly polarized RFID (Radio Frequency Identification Device) tag antenna

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Embodiment Construction

[0029] In order to make the purpose, technical solutions and advantages of the invention more clear and clear, the following reference to the attachment and implementation examples further explained the present invention in detail.It should be understood that the specific embodiments described here are only used to explain the invention and do not limit the present invention.

[0030] The present invention provides a round RFID label antenna.The RFID reader antenna is rounded, and the existing label antennas are extremely lineized. Although the rounded antenna can communicate with the lineization antenna in any direction, due to the difference in polarization methods, it is different.The power receiving loss is very large, so that when the transmitting power is certain, it greatly reduces the reading distance, and to obtain a large reading distance, it is necessary to increase the transmitting power, but for the passive RFID technology,It's almost impossible.The label antenna in t...

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Abstract

The invention discloses a circularly polarized RFID (Radio Frequency Identification Device) tag antenna which comprises a medium substrate, a radiation paster and a matching structure, wherein the radiation paster and the matching structure are arranged on the medium substrate and are connected with each other, and the radiation paster further comprises four sequentially arranged dipole arms which are all connected to the matching structure. The circularly polarized RFID tag antenna is the same as an RFID reader antenna in the polarization mode, so that receiving loss of power can be reduced and reading distance is increased. Meanwhile, antenna size can be reduced, and larger frequency band width is brought. In addition, the circularly polarized RFID tag antenna has the advantages of simple model, easiness in industrial production and the like, and has better market popularization prospect.

Description

Technical field [0001] The invention involves the field of RFID technology and especially involves a round -polarized RFID label antenna. Background technique [0002] RFID (Radio Frequency Identification) is a non -contact automatic recognition technology. It automatically recognizes the target object through RF signal and obtains relevant data. The identification work does not require manual intervention and can work in various harsh environments.RFID can identify high -speed sports objects and can recognize multiple electronic tags at the same time, which is fast and convenient to operate.The RFID system is a simple wireless system, with only two basic devices, which is used to control, detect and track objects.The RFID system consists of an inquiry (or a reader) and a lot of answers (or electronic tags). [0003] RFID is divided into low -frequency (LF), high -frequency (HF), ultra -high frequency (UHF), and microwave (MW) according to different application frequency. The cor...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q21/24
Inventor 何业军贺卫
Owner SHENZHEN UNIV
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