CN110084351B - High-frequency NFC (near field communication) tag for metal-resistant medium - Google Patents
High-frequency NFC (near field communication) tag for metal-resistant medium Download PDFInfo
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- CN110084351B CN110084351B CN201910307022.5A CN201910307022A CN110084351B CN 110084351 B CN110084351 B CN 110084351B CN 201910307022 A CN201910307022 A CN 201910307022A CN 110084351 B CN110084351 B CN 110084351B
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- antenna coil
- wave
- absorbing material
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/0772—Physical layout of the record carrier
- G06K19/07722—Physical layout of the record carrier the record carrier being multilayered, e.g. laminated sheets
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07745—Mounting details of integrated circuit chips
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
- G06K19/07773—Antenna details
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Details Of Aerials (AREA)
- Burglar Alarm Systems (AREA)
Abstract
The invention relates to a high-frequency NFC (near field communication) tag for a metal-resistant medium, which comprises a tag body, a surface material and base paper, wherein the surface material and the base paper are respectively covered on the front side and the back side of the tag body; the front side and the back side of the label body are respectively provided with a front side antenna coil and a back side antenna coil, the winding direction of the front side antenna coil is opposite to that of the back side antenna coil, the line width of a back side antenna in the back side antenna coil is 1-3 times of that of the front side antenna in the front side antenna coil, and the registration accuracy of the front side antenna coil and the back side antenna coil is less than 0.15 mm; the front antenna coil and the back antenna coil are riveted and conducted, and the front antenna coil is conducted and connected with the chip on the front side of the label body; the front or the back of the label body facing the base paper is provided with a wave-absorbing material layer. According to the invention, the reverse side antenna coil is added in the label design, so that the small-size label has better performance; and the wave-absorbing material structure is added, so that the negative effect of the metal surface on reading the tag is relieved on the metal surface of the high-frequency tag.
Description
Technical Field
The invention relates to a high-frequency NFC (near field communication) tag for a metal-resistant medium, belonging to the technical field of electronic tag design.
Background
The RFID electronic tag is often used in a metal environment, when the RFID electronic tag is close to metal, the metal has strong reflectivity to electromagnetic waves, so that the card reading distance is closer along with the weakening of signals, and the phenomenon of card reading failure can occur due to serious interference; therefore, when the RFID high-frequency tag (passive tag) is attached to the surface of an object such as metal or a place near the object with a metal device, the signal strength of the signal emitted by the reader/writer is greatly reduced due to the eddy current attenuation of the metal, which results in a short reading distance or a reading failure. At present, the general solution is to stick a layer of thick foam material on the back of the electronic tag, and to increase the distance between the tag and the metal surface, thereby reducing the reflectivity of the metal to the tag. But such a design is not effective.
Disclosure of Invention
The invention aims to solve the problems and provides a high-frequency NFC tag for a metal-resistant medium.
The invention aims to realize the high-frequency NFC label for the anti-metal medium, which comprises a label body, a surface material and a piece of backing paper, wherein the surface material and the backing paper are respectively covered on the front surface and the back surface of the label body; the front side of the label body is provided with a chip; the method is characterized in that:
the front side and the back side of the label body are respectively provided with a front side antenna coil and a back side antenna coil, the winding direction of the front side antenna coil is opposite to that of the back side antenna coil, the line width of a front side antenna in the front side antenna coil is 0.2 mm-1.0 mm, the line width of a back side antenna in the back side antenna coil is 1-3 times of that of the front side antenna in the front side antenna coil, and the registration accuracy of the front side antenna coil and the back side antenna coil is less than 0.15 mm; the front antenna coil and the back antenna coil are riveted and conducted, and the front antenna coil is conducted and connected with the chip on the front side of the label body;
the label is characterized by also comprising a wave-absorbing material layer, wherein the wave-absorbing material layer is adhered to the front surface or the back surface of the label body, the thickness of the wave-absorbing material layer is 0.08-1.5 mm, and the magnetic permeability of the wave-absorbing material in the wave-absorbing material layer is 20-100; when the wave-absorbing material layer is adhered to the front side of the label body, the wave-absorbing material layer is conducted with the front side antenna coil, and when the wave-absorbing material layer is adhered to the back side of the label body, the wave-absorbing material layer is conducted with the back side antenna coil.
The reverse side antenna coil is formed by 2 circles of reverse side antennas.
The high-frequency NFC tag for the metal-resistant medium is reasonable in structure, easy to produce and manufacture and convenient to use, and the size of the tag is reduced by the design of the coil on the back side of the tag (tag body), and the frequency point is 13.56Mhz +/-0.5 Mhz; the high-frequency label is designed by realizing signal communication after a metal coil is wound, but the smaller the area of the wound wire is, the frequency point of the label can drift to a place beyond 16Mhz, and the label cannot work normally, so that the label with the size smaller than 22x22mm can work normally at the frequency point of 13.56Mhz, and the design requirement on the product winding is higher.
By the invention, the solution is as follows: the method comprises the following steps that lines (front antennas) with the line width of 0.2 mm-1.0 mm are adopted, winding is conducted in the same direction, and due to the fact that the size of a product is small, when coils on the chip surface of a label body are full, metal lines (back antennas) and the front lines (front antennas) are wound in the opposite direction on the back of the antenna, so that the accumulation of the winding coils is achieved, the area of the winding coils of the product is increased in a phase-changing mode, and the winding area of the small-size label is doubled; and finally riveting the positive and negative coils (the positive antenna coil and the negative antenna coil) to complete the communication of the positive and negative coils.
The design principle is as follows:
a) the winding directions of the front antenna coil and the back antenna coil are reverse;
b) the line width of the back antenna in the back antenna coil is multiple (1-3 times) of the line width of the front antenna in the front antenna coil, if the line width of the front antenna is 0.3mm, the line width of the back antenna is designed to be 0.6mm, and the coupling resonance effectiveness of the front antenna coil and the back antenna coil of the tag can be improved;
c) the registration accuracy of the front antenna coil and the back antenna coil is less than 0.15 mm;
e) the number of turns of the front antenna coil designed on the front side is unchanged, and the number of turns of the back antenna coil arranged on the back side is 2.
When the radio frequency tag is used, a layer of wave-absorbing material is arranged between the metal surface and the tag body, so that the influence on a magnetic field is generated, the negative effect of the metal surface on tag reading is relieved, and the sensing capability of a radio frequency signal on the tag is enhanced. During manufacturing, a wave-absorbing material layer with the thickness of 0.08-1.5 mm is arranged on the back surface of the label body facing the base paper, the magnetic permeability of the wave-absorbing material in the wave-absorbing material layer is 20-100, and the antenna coil on the back surface of the label body is communicated with the wave-absorbing material in the wave-absorbing material layer.
Selecting a material with the magnetic permeability of the wave-absorbing material being 20-100 and the thickness being 0.08-1.5 mm, so that the wave-absorbing material can be well matched with a label, and the influence of a metal surface on the label is relieved;
the design of a reverse coil of the high-frequency tag is realized, the coil on the reverse side (a reverse antenna coil) is combined with the wave-absorbing material, and the coil on the reverse side (the reverse antenna coil) is conducted with the wave-absorbing material, which is equivalent to the increase of the tag, so that the tag performance is stronger;
the communication mode of the back coil and the wave-absorbing material is that the label (label body) and the wave-absorbing material are combined by using the adhesive material, so that the resonant magnetic field of the back coil of the label is combined with the metal magnetic field in the wave-absorbing material, the efficiency of the label is improved, and the mutual inductance effect of metal to the label is resisted.
Therefore, by the invention, the reverse coil (reverse antenna coil) is added in the label design, so that the small-size label has better performance; the wave-absorbing material structure is added, so that the negative effect of the metal surface on reading the tag is relieved on the metal surface of the high-frequency tag, and the sensing capability of a radio-frequency signal on the tag is enhanced; the coil is designed on the back surface of the high-frequency tag and is combined with the wave-absorbing material, and the coil on the back surface is conducted with the wave-absorbing material, so that the tag is enlarged, and the tag performance is stronger.
Drawings
Fig. 1 is a schematic front view of a label body according to the present invention.
Fig. 2 is a schematic view of the back structure of the label body according to the present invention.
Fig. 3 is a schematic view of the overall structure of the present invention.
In the figure: 1 label body, 2 plane materiel, 3 backing papers, 4 front antenna coils, 5 back antenna coils, 6 wave-absorbing material layers.
Detailed Description
The technical solutions in the examples of the present invention will be described in detail below with reference to the accompanying drawings in the examples of the present invention.
A high-frequency NFC label for a metal-resistant medium comprises a label body 1, a surface material 2 and a backing paper 3, wherein the surface material 2 and the backing paper 3 cover the front side and the back side of the label body 1 respectively, and a chip is arranged on the front side of the label body 1; the front side and the back side of the label body 1 are respectively provided with a front side antenna coil 4 and a back side antenna coil 5, the winding direction of the front side antenna coil 4 is opposite to that of the back side antenna coil 5, the line width of a front side antenna in the front side antenna coil 4 is 0.2 mm-1.0 mm, the line width of a back side antenna in the back side antenna coil 5 is 1-3 times of that of the front side antenna in the front side antenna coil 4, and the registration accuracy of the front side antenna coil 4 and the back side antenna coil 5 is less than 0.15 mm; the front antenna coil 4 and the back antenna coil 5 are riveted to conduct communication, and the front antenna coil 4 is in conducting connection with the chip on the front side of the label body 1.
The label is characterized by further comprising a wave-absorbing material layer 6, wherein the wave-absorbing material layer 6 is adhered to the front side or the back side of the label body 1, the thickness of the wave-absorbing material layer 6 is 0.08-1.5 mm, and the magnetic permeability of a wave-absorbing material in the wave-absorbing material layer 6 is 20-100; when the wave-absorbing material layer 6 is adhered to the front side of the tag body 1, the wave-absorbing material layer 6 is conducted with the front side antenna coil 4, and when the wave-absorbing material layer 6 is adhered to the back side of the tag body 1, the wave-absorbing material layer 6 is conducted with the back side antenna coil 5. Further, the back antenna coil 5 is constituted by a 2-turn back antenna.
Claims (1)
1. A high-frequency NFC label for a metal-resistant medium comprises a label body (1), a surface material (2) and a backing paper (3), wherein the surface material (2) and the backing paper (3) are respectively covered on the front surface and the back surface of the label body (1); the front surface of the label body (1) is provided with a chip; the method is characterized in that:
the front and the back of the label body (1) are respectively provided with a front antenna coil (4) and a back antenna coil (5), the winding direction of the front antenna coil (4) is opposite to that of the back antenna coil (5), the line width of a front antenna in the front antenna coil (4) is 0.2 mm-1.0 mm, the line width of a back antenna in the back antenna coil (5) is 1-3 times of that of the front antenna in the front antenna coil (4), and the registration accuracy of the front antenna coil (4) and the back antenna coil (5) is less than 0.15 mm; the front antenna coil (4) and the back antenna coil (5) are riveted and conducted, and the front antenna coil (4) is in conductive connection with the chip on the front side of the label body (1);
the label is characterized by also comprising a wave-absorbing material layer (6), wherein the wave-absorbing material layer (6) is adhered to the front surface or the back surface of the label body (1), the thickness of the wave-absorbing material layer (6) is 0.08-1.5 mm, and the magnetic permeability of the wave-absorbing material in the wave-absorbing material layer (6) is 20-100; when the wave-absorbing material layer (6) is adhered to the front surface of the label body (1), the wave-absorbing material layer (6) is communicated with the front antenna coil (4), and when the wave-absorbing material layer (6) is adhered to the back surface of the label body (1), the wave-absorbing material layer (6) is communicated with the back antenna coil (5);
the reverse side antenna coil (5) is formed by 2 circles of reverse side antennas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910307022.5A CN110084351B (en) | 2019-04-17 | 2019-04-17 | High-frequency NFC (near field communication) tag for metal-resistant medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910307022.5A CN110084351B (en) | 2019-04-17 | 2019-04-17 | High-frequency NFC (near field communication) tag for metal-resistant medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110084351A CN110084351A (en) | 2019-08-02 |
| CN110084351B true CN110084351B (en) | 2022-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910307022.5A Active CN110084351B (en) | 2019-04-17 | 2019-04-17 | High-frequency NFC (near field communication) tag for metal-resistant medium |
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| CN (1) | CN110084351B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116937177B (en) * | 2023-07-13 | 2024-04-26 | 苏州铂韬新材料科技有限公司 | NFC antenna of mobile phone and preparation method of wave-absorbing material of NFC antenna |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4653440B2 (en) * | 2004-08-13 | 2011-03-16 | 富士通株式会社 | RFID tag and manufacturing method thereof |
| CN101799882A (en) * | 2009-02-06 | 2010-08-11 | 上海中京电子标签集成技术有限公司 | High-frequency small-size radio frequency identification and manufacturing method of etching antenna thereof |
| CN204087242U (en) * | 2014-11-03 | 2015-01-07 | 济南中正新材料有限公司 | A kind of ultrahigh frequency anti-metal electronic tag |
| CN205354088U (en) * | 2016-01-22 | 2016-06-29 | 深圳市卡的智能科技有限公司 | RFID tag antenna and RFID label |
| CN107844824A (en) * | 2017-11-15 | 2018-03-27 | 上扬无线射频科技扬州有限公司 | A kind of small-sized UHF labels of duolateral coil |
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| CN110084351A (en) | 2019-08-02 |
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Address after: 225009 No. 88 east Wu Road, Yangzhou Economic Development Zone, Jiangsu, China Applicant after: Yongdao Radio Frequency Technology Co.,Ltd. Address before: 225009 No. 88 east Wu Road, Yangzhou Economic Development Zone, Jiangsu, China Applicant before: ARIZON RFID TECHNOLOGY (YANGZHOU) Co.,Ltd. |
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