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Novel size reducible ultrahigh frequency_radio frequency identification (UHF_RFID) anti-metal tag and antenna

An anti-metal tag and size-resistant technology, applied in the field of RFID (Radio Frequency Identification) tags, can solve the problems of not being able to reduce the size of the antenna and affect the size of the tag, and achieve the effects of size reduction, good electrical performance, and reasonable layout

Active Publication Date: 2012-07-04
XERAFY (NANTONG) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a new type of UHF_RFID anti-metal tag that can reduce the size to solve the technical problem that the size of the antenna in the tag in the prior art is related to the wavelength of the waveguide, and the size of the antenna cannot be reduced, thereby affecting the reduction of the size of the tag.
[0006] Another object of the present invention is to provide an antenna to solve the technical problem that the size of the antenna in the tag in the prior art is related to the wavelength of the waveguide, and the size of the antenna cannot be reduced, thereby affecting the reduction of the size of the tag

Method used

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  • Novel size reducible ultrahigh frequency_radio frequency identification (UHF_RFID) anti-metal tag and antenna
  • Novel size reducible ultrahigh frequency_radio frequency identification (UHF_RFID) anti-metal tag and antenna
  • Novel size reducible ultrahigh frequency_radio frequency identification (UHF_RFID) anti-metal tag and antenna

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Embodiment 1

[0018] See figure 1 , Which is a side view of a new UHF_RFID anti-metal tag that can be reduced in size, including an antenna and an IC chip 14. The antenna further includes a dielectric substrate 11, and one side of the dielectric substrate 11 is provided with a ground layer 13, which corresponds to A radiation electrode layer 12 is provided on the surface. The radiation electrode layer 12 is connected to the RF port of the IC chip 14 through a first feeder line, and the ground layer 13 is connected to the GND port of the IC chip 14 directly or through a second feeder line. At least one conductive metal strip 15 is arranged between the electrode layer 12 and the ground layer 13, and the radiation electrode layer 12 is connected to the ground layer 13 through the metal strip 15.

[0019] The conductive metal strip 15 can be made of metal material, which can achieve the effect of connecting the radiation electrode layer 12 and the ground layer 13. The conductive metal strip 15 is m...

Embodiment 2

[0029] Conductive metal strips are replaced by inductors. In fact, the Q value of the inductor is relatively low, and its loss value is greater than that of the conductive metal strip. Although the realization effect of the conductive metal strip is better than that of the inductor, the inductor can also be realized.

[0030] A new type of UHF_RFID anti-metal tag that can reduce the size, including an antenna and an IC chip, the antenna further includes a dielectric substrate, one side of the dielectric substrate is provided with a ground layer, and the corresponding surface is provided with a radiation electrode layer, the radiation electrode layer The first feeder is connected to the RF port of the IC chip, the ground layer is connected to the GND port of the IC chip through a section of metal layer or directly through the second feeder, at least one inductor is set between the radiation electrode layer and the ground layer, The inductance connects the radiating electrode layer...

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Abstract

The invention discloses a novel size reducible ultrahigh frequency_radio frequency identification (UHF_RFID) anti-metal tag, which comprises an antenna and an integrated chip (IC), wherein the antenna further comprises a medium substrate; one surface of the medium substrate is provided with a grounding layer, and the other surface of the medium substrate is provided with a radiation electrode layer; the radiation electrode layer is connected with a radio frequency (RF) port of the IC through a first feedback line; the grounding layer is directly connected with a grounding (GND) port of the IC or connected with the GND port of the IC through a second feedback line; at least one conductive metal bar is arranged between the radiation electrode layer and the grounding layer; the radiation electrode layer is connected with the grounding layer through the conductive metal bar; the width of the conductive metal bar is less than 1 centimeter; and the first feedback line, the second feedback line and the conductive metal bar are arranged on the same side. The sizes of the antenna and the tag can be reduced.

Description

Technical field [0001] The present invention relates to an RFID (Radio Frequency Identification) tag, in particular to a UHF (UHF-Ultra High Frequency) RFID tag. Background technique [0002] The RFID system usually consists of three parts: a reader, an RFID tag, and an operating system. The radio frequency tag attached to the object to be identified contains electronic data in an agreed format as the identifying information of the object to be identified. The reader can read the electronic data stored in the tag or write the information into the tag without contact, so as to realize the automatic identification and management of various objects. The reader and the radio frequency tag communicate with each other in accordance with the agreed communication protocol using advanced radio frequency technology. The basic communication process is as follows: (1) The tag within the range of the reader receives the carrier energy sent by the reader, and powers on to reset; (2) ) The ta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K19/077H01Q1/22H01Q1/48
Inventor 刘智佳
Owner XERAFY (NANTONG) CO LTD