CN102938089A - Near field communication (NFC) tag antenna - Google Patents

Near field communication (NFC) tag antenna Download PDF

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Publication number
CN102938089A
CN102938089A CN2012104568490A CN201210456849A CN102938089A CN 102938089 A CN102938089 A CN 102938089A CN 2012104568490 A CN2012104568490 A CN 2012104568490A CN 201210456849 A CN201210456849 A CN 201210456849A CN 102938089 A CN102938089 A CN 102938089A
Authority
CN
China
Prior art keywords
bearing substrate
rectangular iron
nfc
iron oxysome
coil circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2012104568490A
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Chinese (zh)
Inventor
梁迪飞
李维佳
谢建良
邓龙江
陈良
阙智勇
何琪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chengdu Jiachi Electronic Technology Co ltd
University of Electronic Science and Technology of China
Original Assignee
Chengdu Jiachi Electronic Technology Co ltd
University of Electronic Science and Technology of China
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chengdu Jiachi Electronic Technology Co ltd, University of Electronic Science and Technology of China filed Critical Chengdu Jiachi Electronic Technology Co ltd
Priority to CN2012104568490A priority Critical patent/CN102938089A/en
Publication of CN102938089A publication Critical patent/CN102938089A/en
Pending legal-status Critical Current

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Abstract

The invention relates to an NFC tag antenna and belongs to the technical field of electronics. The antenna comprises a rectangular ferrite bearing substrate, a rectangular coil circuit and an NFC chip, wherein the rectangular coil circuit and the NFC chip are arranged on the surface of the rectangular ferrite bearing substrate, and two ends of the rectangular coil circuit are connected with an antenna port of the NFC chip; the rectangular ferrite bearing substrate is made of a ferrite material with a permeability real part between 40 and 90 and a permeability imaginary part between 0.5 and 7; and the distance W1 between the outer edge of the rectangular coil circuit and the outer edge of the rectangular ferrite bearing substrate is 4-8mm. According to the antenna, the antenna bearing substrate is made of the ferrite material with relative low permeability and cost, so that the bearing substrate can operate on metal surfaces, the production cost of the NFC tag antenna is reduced, and mass and standardized production of tag antennas is possible.

Description

A kind of wireless near field communication label antenna
Technical field
The invention belongs to electronic technology field, relate to the short distance wireless communication technology (Near Field Communication is called for short NFC), be specifically related to the NFC label antenna.
Background technology
NFC is Near Field Communication abbreviation, i.e. near field communication (NFC).It is a kind of contactless identification and interconnection technique, can carry out wireless near field communication at mobile device, consumer electronics product, PC and smart control Tool Room.NFC provides a kind of solution of simple, touch, can allow consumer's simple, intuitive ground exchange message, access content and serve.
NFC has the characteristics of two-way connection and identification, works in the 13.56MHz frequency range, 10 centimetres of left and right of operating distance.The NFC technology promotes standardization under ISO 18092, ECMA340 and ETSI TS 102190 frameworks, simultaneously the also compliant applications architecture of ISO14443Type-A, B and Felica standard contact type intelligent card widely.
NFC information is transmitted by the electromagnetic induction coupling scheme of wireless frequency part in frequency spectrum.NFC be a kind ofly provide easily, safety, the wireless connect technology of communication rapidly, there are the characteristics such as near distance, energy consumption are low.NFC and existing contactless smart card technical compatibility, become the official standard that more and more leading firms support at present.
The NFC label antenna is to take the RFID REID as basis, adopt transformer to be total to the hardware handles scheme that the coupling coupling is done communication, and complete the verification of data transfer procedure by the communication instruction of processor, hardware environment passes through the RFID modulation treatment, and designs and produces successful by the match circuit adjustment.The circuit coil that the NFC antenna is generally made by coiling/printing/etch process and the Ferrite Material of antijamming capability form.
Along with popularizing of personal hand-held electronic equipment, NFC more and more has feasibility as individual mobile device for paying scheme, but because being based on the electromagnetic induction coupling scheme, the NFC technology carries out the information transmission, and the metal environment of complexity in individual mobile device, tend to make electromagnetic signal seriously to decay, thereby cause the NFC antenna can't read signal, finally make the NFC system be integrated in personal hand-held equipment easily.
The NFC label antenna that has occurred on market now working with metal surface, the most of bearing substrate of Ferrite Material as NFC aerial coil circuit that use of this class antenna, be fixed in ferrite bearing substrate surface by NFC aerial coil circuit and NFC chip.When the NFC system is used, between the circuit coil of NFC emitting antenna and NFC receiving antenna across receive-transmit system metal level separately and ferrite bearing substrate separately.Because the ferrite covered substrate has good anti-electromagnetic interference capability, play and suppress metal surface to the space magnetic field destruction, thereby make the NFC label antenna can work and metal surface.
Yet in existing NFC system research and development handbook and similar antenna patent, be all loosely to mention between the circuit coil of NFC label antenna and metal level, adding magnetic material to suppress the metal watch second of the destruction to space magnetic field, but the magnetic characteristic of magnetic material, thickness, geometry etc. are not all had to corresponding explanation, actual production is not had to directive function.
Summary of the invention
The invention provides a kind of wireless near field communication label antenna (NFC antenna), this NFC label antenna adopts relatively low, the lower-cost Ferrite Material of magnetic permeability as the antenna bearing substrate, can work and metal surface.
Technical solution of the present invention is as follows:
A kind of wireless near field communication label antenna, as shown in Figure 1, comprise rectangular iron oxysome bearing substrate 1, square coil circuit 2 and NFC chip 3, described square coil circuit 2 is connected with the antenna port of NFC chip 3 with the two ends that NFC chip 3 is positioned at rectangular iron oxysome bearing substrate 1 surface and square coil circuit 2.Described rectangular iron oxysome bearing substrate 1 adopt the magnetic permeability real part between 40 to 90, the Ferrite Material of magnetic permeability imaginary part between 0.5 to 7 make; Distance W 1 between the outer ledge of described square coil circuit 2 and rectangular iron oxysome bearing substrate 1 outer ledge is between 4 millimeters to 8 millimeters.
It should be noted that, wireless near field communication label antenna provided by the invention, wherein the thickness of rectangular iron oxysome bearing substrate 1 can be selected between 0.1mm ~ 0.25mm, the thinner magnetic material volume that takes up space is approximately little, but magnetic material is thinner more weak to the space magnetic field reducing power, just need to increase the real part of magnetic permeability; The magnetic permeability real part of rectangular iron oxysome bearing substrate 1 can be chosen between 40 ~ 90, and magnetic permeability is higher better to the space magnetic field reducing power, but the Q value that affects antenna that also can be too much; The magnetic permeability imaginary part of rectangular iron oxysome bearing substrate 1 can be chosen between 0.5 ~ 7, but the magnetic permeability imaginary part is higher, can introduce larger antenna resistance.
Wireless near field communication label antenna provided by the invention, wherein square coil circuit 2 can adopt the mode of the printing of silver slurry sintering to be made in rectangular iron oxysome bearing substrate 1 surface, the mode that also can adopt printed circuit to be adhered to rectangular iron oxysome bearing substrate 1 surface is made, and even can adopt printed circuit addition preparation technology to be made in rectangular iron oxysome bearing substrate 1 surface.
Wireless near field communication label antenna provided by the invention, in order to increase the mechanical property of rectangular iron oxysome bearing substrate 1, can increase one deck organic film at the back side of rectangular iron oxysome bearing substrate 1, to prevent the embrittlement of rectangular iron oxysome bearing substrate 1.
During wireless near field communication label antenna application provided by the invention, the back side of rectangular iron oxysome bearing substrate 1 is close to layer on surface of metal, rectangular iron oxysome bearing substrate 1 is sandwiched between the square coil circuit 2 and metal level of NFC antenna.
Should illustrate, wireless near field communication label antenna provided by the invention, wherein the distance between the outer ledge of square coil circuit 2 and rectangular iron oxysome bearing substrate 1 outer ledge is between 4 millimeters to 8 millimeters, the distance that surpasses 8mm there is no need, change on space magnetic field does not have larger impact with warp, but be less than 4mm, can make the space magnetic field change larger, be unfavorable for NFC label antenna reading out data.
It will be appreciated by those skilled in the art that, wireless near field communication label antenna provided by the invention, wherein square coil circuit 2 and NFC chip 3 should be able to meet ISO 18092 and ISO 14443Type-A, B and Felica standard contact type intelligent card standard.
Technique effect of the present invention is:
The present invention is under the prerequisite that meets the NFC communicating requirement, the employing magnetic permeability is relatively low, manufacture craft and the cost magnetic material that degree reduces greatly is as the antenna bearing substrate, can work and metal surface, thereby reduced the cost of manufacture of NFC label antenna, made that it is in enormous quantities, standardized production becomes possibility.
The accompanying drawing explanation
Fig. 1 is wireless near field communication tag antenna structure schematic diagram provided by the invention.
Embodiment
Embodiment one
A kind of wireless near field communication label antenna, comprise rectangular iron oxysome bearing substrate 1, square coil circuit 2 and NFC chip 3 that back side overlay film, thickness are 0.12mm ~ 0.2mm, described square coil circuit 2 is connected with the antenna port of NFC chip 3 with the two ends that NFC chip 3 is positioned at rectangular iron oxysome bearing substrate 1 surface and square coil circuit 2.Described rectangular iron oxysome bearing substrate 1 adopt the magnetic permeability real part between 40 to 65, the Ferrite Material of magnetic permeability imaginary part between 0.5 to 7 make; Distance W 1 between the outer ledge of described square coil circuit 2 and rectangular iron oxysome bearing substrate 1 outer ledge is between 7 millimeters to 8 millimeters.
Wherein square coil circuit 2 and NFC chip 3 meet ISO 18092 and ISO14443Type-A, B and Felica standard contact type intelligent card designing technique standard, and the applying frequency scope is 13MHz~14MHz.
Corresponding NFC read-write equipment on application market, and add the metal environment, above-mentioned wireless near field communication label antenna reading/writing distance can reach 70% ~ 86% of original reading/writing distance.
Embodiment two
A kind of wireless near field communication label antenna, comprise rectangular iron oxysome bearing substrate 1, square coil circuit 2 and NFC chip 3 that back side overlay film, thickness are 0.12mm ~ 0.2mm, described square coil circuit 2 is connected with the antenna port of NFC chip 3 with the two ends that NFC chip 3 is positioned at rectangular iron oxysome bearing substrate 1 surface and square coil circuit 2.Described rectangular iron oxysome bearing substrate 1 adopt the magnetic permeability real part between 65 to 90, the Ferrite Material of magnetic permeability imaginary part between 0.5 to 7 make; Distance W 1 between the outer ledge of described square coil circuit 2 and rectangular iron oxysome bearing substrate 1 outer ledge is between 7 millimeters to 8 millimeters.
Wherein square coil circuit 2 and NFC chip 3 meet ISO 18092 and ISO14443Type-A, B and Felica standard contact type intelligent card designing technique standard, and the applying frequency scope is 13MHz ~ 14MHz.
Corresponding NFC read-write equipment on application market, and add the metal environment, above-mentioned wireless near field communication label antenna reading/writing distance can reach 70% ~ 80% of original reading/writing distance.
Embodiment three
A kind of wireless near field communication label antenna, comprise rectangular iron oxysome bearing substrate 1, square coil circuit 2 and NFC chip 3 that back side overlay film, thickness are 0.12mm ~ 0.2mm, described square coil circuit 2 is connected with the antenna port of NFC chip 3 with the two ends that NFC chip 3 is positioned at rectangular iron oxysome bearing substrate 1 surface and square coil circuit 2.Described rectangular iron oxysome bearing substrate 1 adopt the magnetic permeability real part between 40 to 65, the Ferrite Material of magnetic permeability imaginary part between 0.5 to 7 make; Distance W 1 between the outer ledge of described square coil circuit 2 and rectangular iron oxysome bearing substrate 1 outer ledge is between 6 millimeters to 7 millimeters.
Wherein square coil circuit 2 and NFC chip 3 meet ISO 18092 and ISO14443Type-A, B and Felica standard contact type intelligent card designing technique standard, and the applying frequency scope is 13MHz ~ 14MHz.
Corresponding NFC read-write equipment on application market, and add the metal environment, above-mentioned wireless near field communication label antenna reading/writing distance can reach 70% ~ 86% of original reading/writing distance.
Embodiment four
A kind of wireless near field communication label antenna, comprise rectangular iron oxysome bearing substrate 1, square coil circuit 2 and NFC chip 3 that back side overlay film, thickness are 0.12mm ~ 0.2mm, described square coil circuit 2 is connected with the antenna port of NFC chip 3 with the two ends that NFC chip 3 is positioned at rectangular iron oxysome bearing substrate 1 surface and square coil circuit 2.Described rectangular iron oxysome bearing substrate 1 adopt the magnetic permeability real part between 65 to 90, the Ferrite Material of magnetic permeability imaginary part between 0.5 to 7 make; Distance W 1 between the outer ledge of described square coil circuit 2 and rectangular iron oxysome bearing substrate 1 outer ledge is between 6 millimeters to 7 millimeters.
Wherein square coil circuit 2 and NFC chip 3 meet ISO 18092 and ISO14443Type-A, B and Felica standard contact type intelligent card designing technique standard, and the applying frequency scope is 13MHz ~ 14MHz.
Corresponding NFC read-write equipment on application market, and add the metal environment, above-mentioned wireless near field communication label antenna reading/writing distance can reach 70% ~ 80% of original reading/writing distance.
Above-mentioned four embodiments are not limitation of the invention further, and the content that those skilled in the art can describe according to technical solution of the present invention fully is combined into other different embodiment.

Claims (4)

1. a wireless near field communication label antenna, comprise rectangular iron oxysome bearing substrate (1), square coil circuit (2) and NFC chip (3), described square coil circuit (2) is connected with the antenna port of NFC chip (3) with the two ends that NFC chip (3) is positioned at rectangular iron oxysome bearing substrate (1) surface and square coil circuit (2); It is characterized in that, described rectangular iron oxysome bearing substrate (1) adopt the magnetic permeability real part between 40 to 90, the Ferrite Material of magnetic permeability imaginary part between 0.5 to 7 make; Distance W 1 between the outer ledge of described square coil circuit (2) and rectangular iron oxysome bearing substrate (1) outer ledge is between 4 millimeters to 8 millimeters.
2. wireless near field communication label antenna according to claim 1, is characterized in that, the thickness of described rectangular iron oxysome bearing substrate (1) can be selected between 0.1mm ~ 0.25mm.
3. wireless near field communication label antenna according to claim 1 and 2, it is characterized in that, described square coil circuit (2) adopts the mode of the printing of silver slurry sintering to be made in rectangular iron oxysome bearing substrate (1) surface, or the mode that adopts printed circuit to be adhered to rectangular iron oxysome bearing substrate (1) surface makes, or adopt printed circuit addition preparation technology to be made in rectangular iron oxysome bearing substrate (1) surface.
4. wireless near field communication label antenna according to claim 1 and 2, is characterized in that, the back side of described rectangular iron oxysome bearing substrate (1) increases one deck organic film, to prevent the embrittlement of rectangular iron oxysome bearing substrate (1).
CN2012104568490A 2012-11-14 2012-11-14 Near field communication (NFC) tag antenna Pending CN102938089A (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
CN2012104568490A CN102938089A (en) 2012-11-14 2012-11-14 Near field communication (NFC) tag antenna

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103825099A (en) * 2014-02-28 2014-05-28 电子科技大学 Short distance wireless communication tag antenna
CN106650889A (en) * 2016-11-22 2017-05-10 武汉大学 Near field communication label integrated with magnetic composite membrane, and preparation method thereof
CN106872528A (en) * 2017-01-22 2017-06-20 南京大学 Passive and wireless gas sensor based on NFC label and preparation method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1489806A (en) * 2000-12-18 2004-04-14 三菱麻铁里亚尔株式会社 Antenna for RFID
CN1965444A (en) * 2004-04-27 2007-05-16 索尼株式会社 Antenna module-use magnetic core member, antenna module and portable information terminal provided with it
CN101055781A (en) * 2006-03-14 2007-10-17 Nec东金株式会社 Ferrite material, ferrite film formed thereof, and radio frequency identification tag with ferrite film

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1489806A (en) * 2000-12-18 2004-04-14 三菱麻铁里亚尔株式会社 Antenna for RFID
CN1965444A (en) * 2004-04-27 2007-05-16 索尼株式会社 Antenna module-use magnetic core member, antenna module and portable information terminal provided with it
CN101055781A (en) * 2006-03-14 2007-10-17 Nec东金株式会社 Ferrite material, ferrite film formed thereof, and radio frequency identification tag with ferrite film

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103825099A (en) * 2014-02-28 2014-05-28 电子科技大学 Short distance wireless communication tag antenna
CN106650889A (en) * 2016-11-22 2017-05-10 武汉大学 Near field communication label integrated with magnetic composite membrane, and preparation method thereof
CN106872528A (en) * 2017-01-22 2017-06-20 南京大学 Passive and wireless gas sensor based on NFC label and preparation method thereof

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Application publication date: 20130220