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

An anti-metal tag and antenna technology, applied in the field of RFID (Radio Frequency Identification) tags, can solve the problems of inability to reduce the size of the antenna, affecting the size of the tag, and achieve the effect of reducing size, good electrical performance, and convenient installation.

Active Publication Date: 2015-03-25
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

Examples

Experimental program
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Embodiment 1

[0018] see figure 1 , which is a schematic side view of a new type of UHF_RFID anti-metal tag with reduced size, including an antenna and an IC chip 14, the antenna further includes a dielectric substrate 11, and a ground layer 13 is provided on one side of the dielectric substrate 11, which corresponds to The radiation electrode layer 12 is arranged on the surface, and the radiation electrode layer 12 is connected to the RF port of the IC chip 14 through the first feeder, and the ground layer 13 is connected to the GND port of the IC chip 14 directly or through the second feeder. 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, which can achieve the effect of connecting the radiation electrode layer 12 and the ground layer 13 . The conductive metal strip 15 ...

Embodiment 2

[0029]Conductive metal strips are replaced with inductors. In fact, the Q value of the inductor is relatively low, and its loss value is larger 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 novel size-reduced UHF_RFID anti-metal tag includes an antenna and an IC chip. The antenna further includes a dielectric substrate. A ground layer is provided on one side of the dielectric substrate, and a radiation electrode layer is provided on the corresponding surface. 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 arranged between the radiation electrode layer and the ground layer, through The inductor connects the radiation electrode layer to the gr...

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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 (Ultra High Frequency, UHF-Ultra High Frequency) RFID tag. Background technique [0002] A radio frequency identification system usually consists of three parts: a reader, a radio frequency tag (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 identification information of the item to be identified. The reader can read the electronic data stored in the tag or write information into the tag without contact, so as to realize the automatic identification and management of various objects. The reader and the RF tag communicate with each other using advanced radio frequency technology according to the agreed communication protocol. The basic communication process is as follows: (1) The tag within the range of the reader receives the carrier energy sent by ...

Claims

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Application Information

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