CN202929657U - Near field communication label antenna - Google Patents
Near field communication label antenna Download PDFInfo
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- CN202929657U CN202929657U CN 201220600127 CN201220600127U CN202929657U CN 202929657 U CN202929657 U CN 202929657U CN 201220600127 CN201220600127 CN 201220600127 CN 201220600127 U CN201220600127 U CN 201220600127U CN 202929657 U CN202929657 U CN 202929657U
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Abstract
Provided is a near field communication (NFC) label antenna, belonging to the electronic technical field. The NFC label antenna comprises a rectangular ferrite bearing substrate, a rectangular coil circuit and an NFC chip. The rectangular coil circuit and the NFC chip are located on a surface of the rectangular ferrite bearing substrate. A permeability real part of the rectangular ferrite bearing substrate is between 40 to 90 and a permeability imaginary part is between 0.5 to 7. A distance W1 between the outer edge of the rectangular coil circuit and the outer edge of the rectangular ferrite bearing substrate is between 4 millimetres to 8 millimetres. The intermediate part of the rectangular ferrite bearing substrate 1 is provided with a rectangular window; a distance W2 between the side edge of the rectangular window and the inner side edge of the rectangular coil circuit 2 should be 45% greater than a distance W3 between two inner side long edges of the rectangular coil circuit 2. The NFC label antenna employs a ferrite material which has relative low permeability and costs as an antenna bearing substrate, and thereby can work on a metal surface and reduce manufacture costs of an NFC label antenna.
Description
Technical field
The utility model belongs to electronic technology field, relate to the short distance wireless communication technology (Near Field Communication,
Be 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, accessed content and service.
NFC has the characteristics of two-way connection and identification, works in the 13.56MHz frequency range, operating distance 10 centimetres of left and right.The NFC technology promotes standardization under ISO18092, ECMA340 and ETSI TS102190 framework, simultaneously the also compliant applications architecture of ISO14443Type-A, B and Felica standard contact type intelligent card widely.
NFC information is to transmit 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, have the characteristics such as near distance, energy consumption are low.NFC and existing contactless smart card technical compatibility have become the official standard that more and more leading firms support at present.
The NFC label antenna is take the RFID REID as the 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 NFC antenna generally is comprised of the circuit coil of coiling/printing/etch process making and the Ferrite Material of antijamming capability.
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 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, the NFC system can't be integrated in personal hand-held equipment easily.
Occurred on market now working NFC label antenna with the metal surface, the most of Ferrite Material that uses of this class antenna be as the bearing substrate of NFC aerial coil circuit, and NFC aerial coil circuit and NFC chip are fixed in ferrite bearing substrate surface.When the NFC system uses, 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 the metal surface to the space magnetic field destruction, thereby make the NFC label antenna can work and the metal surface.
Yet in existing NFC system research and development handbook and similar antenna patent, be all loosely to mention adding magnetic material to suppress metal watch second to the destruction of space magnetic field between the circuit coil of NFC label antenna and metal level, but the magnetic characteristic of magnetic material, thickness, geometry etc. are not all had corresponding explanation, actual production is not had directive function.
Summary of the invention
The utility model provides a kind of wireless near field communication label antenna (NFC antenna), and this NFC label antenna adopts that magnetic permeability is relatively low, lower-cost Ferrite Material is as the antenna bearing substrate, can work and the metal surface.
Technical solutions of the utility model are as follows:
The 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; Have rectangular window in the middle of described rectangular iron oxysome bearing substrate 1, and the distance W 2 between the inside edge of rectangular window side and square coil circuit 2 should be greater than 45% of the distance W 3 between two inboard long limits of square coil circuit 2.
Need to prove, the wireless near field communication label antenna that the utility model provides, 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 needs 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, can introduce larger antenna resistance but the magnetic permeability imaginary part is higher.
The wireless near field communication label antenna that the utility model provides, wherein square coil circuit 2 can adopt the mode of silver slurry printing and 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.
The wireless near field communication label antenna that the utility model provides 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.
Need to prove, NFC label antenna need of work guarantees that enough longitudinal flux flux just can produce enough induced electromotive forces.Traditional way is with the magnetic material cover antenna, if guarantee enough longitudinal flux flux, must significantly improve the permeability real part, significantly promotes and the effect of excessive lifting magnetic permeability real part can be also the antenna own loss.In fact the edge effect of magnetic material, magnetic flux there is larger infringement, if increasing Edge Distance, can be good address this problem, but excessive back gauge also can make the material excess waste, because it is not obvious that magnetic flux promotes effect, the back gauge size is more satisfactory scope at 4mm to 8mm.And by increasing the method for certain edges thereof distance, can make in the situation that the permeability real part does not need too large (60 to 90,13.56MHz place) to reach required magnetic flux size.In addition, at area place, NTC label antenna place, zones of different is different to the contribution amount of magnetic flux, larger magnetic flux contribution is in the edge of aerial coil circuit, contribution only accounts for 10% left and right of total magnetic flux near aerial coil circuit geometric center magnetic flux to the total amount of magnetic flux, but area occupied 25% left and right, so remove this part area, integral body to signal receives the decline effect that has, but impact is less.If this part area is removed, can save ferrite magnetic material, reduce production costs.
When wireless near field communication label antenna that the utility model provides is used, 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, the wireless near field communication label antenna that the utility model provides, 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 it is larger less than 4mm, space magnetic field to be changed, and is unfavorable for NFC label antenna reading out data.
It will be appreciated by those skilled in the art that, the wireless near field communication label antenna that the utility model provides, wherein square coil circuit 2 and NFC chip 3 should be able to satisfy ISO18092 and ISO14443Type-A, B and Felica standard contact type intelligent card standard.
Technique effect of the present utility model is:
The utility model is under the prerequisite that satisfies the NFC communicating requirement, the employing magnetic permeability is relatively low, manufacture craft and cost greatly the magnetic material that reduces of degree as the antenna bearing substrate, can work and the metal surface, thereby reduced the cost of manufacture of NFC label antenna, made that it is in enormous quantities, standardized production becomes possibility.
Description of drawings
The wireless near field communication tag antenna structure schematic diagram that Fig. 1 provides for the utility model.
Embodiment
Embodiment one
The wireless near field communication label antenna, comprise that back side overlay film, thickness are rectangular iron oxysome bearing substrate 1, square coil circuit 2 and the NFC chip 3 of 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; Have rectangular window in the middle of described rectangular iron oxysome bearing substrate 1, and the distance W 2 between the inside edge of rectangular window side and square coil circuit 2 should be greater than 45% of the distance W 3 between two inboard long limits of square coil circuit 2.
Wherein square coil circuit 2 and NFC chip 3 satisfy ISO18092 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% ~ 83% of original reading/writing distance.
Embodiment two
A kind of wireless near field communication label antenna, comprise that back side overlay film, thickness are rectangular iron oxysome bearing substrate 1, square coil circuit 2 and the NFC chip 3 of 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; Have rectangular window in the middle of described rectangular iron oxysome bearing substrate 1, and the distance W 2 between the inside edge of rectangular window side and square coil circuit 2 should be greater than 45% of the distance W 3 between two inboard long limits of square coil circuit 2.
Wherein square coil circuit 2 and NFC chip 3 satisfy ISO18092 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% ~ 75% of original reading/writing distance.
Embodiment three
A kind of wireless near field communication label antenna, comprise that back side overlay film, thickness are rectangular iron oxysome bearing substrate 1, square coil circuit 2 and the NFC chip 3 of 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; Have rectangular window in the middle of described rectangular iron oxysome bearing substrate 1, and the distance W 2 between the inside edge of rectangular window side and square coil circuit 2 should be greater than 45% of the distance W 3 between two inboard long limits of square coil circuit 2.
Wherein square coil circuit 2 and NFC chip 3 satisfy ISO18092 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% ~ 82% of original reading/writing distance.
Embodiment four
A kind of wireless near field communication label antenna, comprise that back side overlay film, thickness are rectangular iron oxysome bearing substrate 1, square coil circuit 2 and the NFC chip 3 of 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; Have rectangular window in the middle of described rectangular iron oxysome bearing substrate 1, and the distance W 2 between the inside edge of rectangular window side and square coil circuit 2 should be greater than 45% of the distance W 3 between two inboard long limits of square coil circuit 2.
Wherein square coil circuit 2 and NFC chip 3 satisfy ISO18092 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% ~ 75% of original reading/writing distance.
Above-mentioned four embodiments are not to be to further restriction of the present utility model, and those skilled in the art can be combined into other different embodiment according to the content that technical solutions of the utility model are described fully.
Claims (4)
1. 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; Have rectangular window in the middle of described rectangular iron oxysome bearing substrate (1), and the distance W 2 between the inside edge of rectangular window side and square coil circuit (2) should be greater than 45% of the distance W 3 between two inboard long limits of square coil circuit (2).
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 and 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 adopts 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).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220600127 CN202929657U (en) | 2012-11-14 | 2012-11-14 | Near field communication label antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220600127 CN202929657U (en) | 2012-11-14 | 2012-11-14 | Near field communication label antenna |
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| Publication Number | Publication Date |
|---|---|
| CN202929657U true CN202929657U (en) | 2013-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220600127 Expired - Fee Related CN202929657U (en) | 2012-11-14 | 2012-11-14 | Near field communication label antenna |
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| Country | Link |
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| CN (1) | CN202929657U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102930330A (en) * | 2012-11-14 | 2013-02-13 | 电子科技大学 | Near field communication (NFC) tag antenna |
-
2012
- 2012-11-14 CN CN 201220600127 patent/CN202929657U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102930330A (en) * | 2012-11-14 | 2013-02-13 | 电子科技大学 | Near field communication (NFC) tag antenna |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130508 Termination date: 20141114 |
|
| EXPY | Termination of patent right or utility model |