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Radio frequency identification tag with capacitive load

A radio frequency identification tag, capacitive load technology, applied in the field of radio frequency identification tags, can solve the problems of difficulty and large size, and achieve the effect of reducing operating frequency, light weight and reducing size

Active Publication Date: 2015-03-25
CHINA STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the known one-by-one product-oriented RFID tag design, it is mainly to provide the required inductive reactance, and the inductive design depends entirely on the length of the current loop path, so it is limited by physical characteristics , to design a tag antenna with high inductance, its size will be relatively large, so it is not easy to achieve the requirement of further miniaturization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] figure 1 (a)-1(c) and 1(a')-1(c') respectively show two schematic diagrams of the first embodiment of the radio frequency identification (RFID) tag with capacitive load of the present invention. in, figure 1 (a) and 1(a') ​​are top views; figure 1 (b) and 1(b') are front views; figure 1 (c) and 1(c') are right side views. In each of the following figures, (a) and (a') also indicate top views, (b) and (b') indicate front views, and (c) and (c') indicate right side views.

[0014] refer to figure 1 (a)-1(c), in this embodiment, the radio frequency identification tag 1 with a capacitive load includes: an antenna unit 11 , a capacitive load 12 and a radio frequency identification device 13 . The antenna unit 11 includes two metal sheets 111 and a conductive substrate 112 , the two metal sheets 111 are located above the conductive substrate 112 and are electrically connected to the conductive substrate 112 .

[0015] In this embodiment, the antenna unit 11 further incl...

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PUM

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Abstract

The invention relates to a radio frequency identification tag with a capacitive load. The radio frequency identification tag comprises an antenna unit, the capacitive load and a radio frequency identification device. The antenna unit comprises two metal sheets and a conducting substrate, wherein the metal sheets are located the opposite position above the conducting substrate and are in electric connection with the conducting substrate. The capacitive load is in electric connection with the metal sheets. The radio frequency identification device carries out feed-in to the antenna unit by being in electric connection with the metal sheets or in a coupled mode. Accordingly, the operation frequency can be greatly lowered, high impedance of an imaginary part is obtained under the same size of the antenna unit so as to reduce the size of the radio frequency identification tag, and the radio frequency identification tag has the advantages that the radio frequency identification tag is light in weight and easy to manufacture, and adjusting elasticity of a follow-up structure is large.

Description

technical field [0001] The invention relates to a radio frequency identification (RFID) tag, in particular to a radio frequency identification tag with a capacitive load. Background technique [0002] The radio frequency identification tag is directly attached to the product, so it will encounter many problems in use. In the known technology, the system cannot read the identification data in the RFID tag, such as: commodities packaged with metal materials, commodities whose contents are liquid, etc.; especially the application on metal objects, because metal can be regarded as a good conductor, It is a perfect reflective surface for electromagnetic waves, so when attaching RFID tags to metal objects, it often causes signal interference, making the antenna close to the metal objects unable to effectively receive and emit electromagnetic waves, resulting in the effective reading distance of the system being several meters. Reduced to within 1-2 cm, or even completely ineffect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K19/077
Inventor 陈松琳吴翊安
Owner CHINA STEEL