CN104659473A - Three-dimensional NFC (Near Field Communication) antenna - Google Patents
Three-dimensional NFC (Near Field Communication) antenna Download PDFInfo
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- CN104659473A CN104659473A CN201310608735.8A CN201310608735A CN104659473A CN 104659473 A CN104659473 A CN 104659473A CN 201310608735 A CN201310608735 A CN 201310608735A CN 104659473 A CN104659473 A CN 104659473A
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Abstract
The invention relates to a three-dimensional NFC (Near Field Communication) antenna which is internally built in terminal equipment, wherein the NFC antenna comprises a magnetic permeable material plate and a copper conducting wire, the copper conducting wire is wound on the magnetic permeable material plate, so as to form an LC oscillation circuit, the two ends of the copper conducting wire are taken as contact points to be connected to the interior of the terminal equipment, electrical inductance is formed in the wiring length of the copper conducting wire, a coil clearance formed by winding of the copper conducting wire forms capacitance, and by adjusting the wiring length of the copper conducting wire and the coil clearance of the copper conducting wire and controlling the resonance of the LC oscillation circuit, electrical signals are converted into electromagnetic waves to be transmitted, namely, a magnetic coupling communication way is used. Compared with the prior art, the three-dimensional NFC antenna provided by the invention is simple to manufacture, can work independently, is independent of other environmental factor resonance, occupies a small space due to the design, is easy to mount, has a strong metal interference-resisting capability, and can meet using requirements of NFC and RFID.
Description
Technical field
The present invention relates to a kind of NFC antenna, especially relate to a kind of three-dimensional NFC antenna.
Background technology
Now, a large amount of electronic products has the function of wireless transmission, and in wireless transmitting system, antenna is used to the critical elements launching and receive electromagnetic wave energy, and along with the development of antenna, NFC antenna obtains to be applied more and more widely.
Near-field communication (Near Field Communication, NFC), also known as wireless near field communication, be a kind of short-range high frequency wireless communication technology, allow to carry out contactless Point-to-Point Data Transmission (in ten centimetres) swap data between electronic equipment.This technology is developed by contact-free formula radio-frequency (RF) identification (RFID), and backward compatible RFID, succeeded in developing separately by Sony and Philips the earliest, be mainly used in the handheld devices such as mobile phone, providing the M2M communication of (Machine to Machine).Because near-field communication has natural fail safe, therefore, NFC technique is considered to have great application prospect in fields such as mobile-phone payments.Meanwhile, NFC is also because it is compared to " security dialogues " between machine compared to the good fail safe of other wireless communication techniques by alliance of Chinese Internet of Things school-run enterprise.
NFC chip has mutual communication function, and have computing capability, and also containing encryption logic circuit in Felica standard, the later stage standard of MIFARE has also added encrypting-decrypting module (SAM).
The NFC operating such FeliCaTM standard of Sony, and ISO14443A, B, namely use the MIFARE standard of Philip.In the industry cycle referred to as TypeA, TypeB and TypeF, wherein A, B are Mifare standard, and F is Felica standard.
In order to promote the development of NFC and popularize, industry creates a non-profit-making normal structure-NFCForum, promotes enforcement and the standardization of NFC technique, guarantees cooperative cooperating between equipment and service.NFCForum has hundreds of members in the whole world, comprising: SONY, Philips, LG, Motorola, NXP, NEC, Samsung, atoam, Intel, wherein Chinese member have Meizu, Bubukao vivo, OPPO, millet, China Mobile, Huawei, in emerging, Shanghai with credit and Taiwan Zheng Longdeng company.
NFC antenna, be a kind of near-field coupling antenna, because 13.56Mhz wavelength is very long, and reading/writing distance is very short, and suitable coupled modes are magnetic Field Couplings, and coil is suitable coupled modes.Consumer product due to mobile phone and so on has very high appearance requirement, and therefore antenna generally needs built-in.But after built-in antenna, antenna just must press close to mainboard or battery (all containing metallic conductor composition).The consequence of such design is, antenna can produce eddy current to weaken the magnetic field of antenna at conductive surface.Therefore, industry usually adopts magnetic thin film laminating FPC mode to make antenna in mobile phone.A kind of new technology is that magnetic thin film and FPC unify, and is also magnetic FPC.
Chinese patent CN103247853A discloses the manufacture method of a kind of NFC antenna, mobile terminal and antenna; the screen for screened shielded antanna that described NFC antenna mainly comprises line layer, is arranged at the insulating barrier for the protection of line layer on line layer and is arranged on insulating barrier; also comprise for connecting electroplate lead wire with the plating extension of electroplating line layer, described plating extension is positioned at the edge of described line layer and is connected with line layer.The line layer of the NFC antenna that this invention provides is well complete, and it has more reliable electrical property and higher yields, but this antenna has complex structure, manufactures the shortcomings such as difficulty.
Chinese patent CN103050779A discloses a kind of NFC antenna and manufacture method thereof and a kind of NFC communication equipment, four layers of cabling printed by FPC circuit board, can when track lengths be identical, greatly reduce the sheet frame size of NFC antenna, utilize the radiation of NFC antenna to realize the effect of NFC with receiving, be beneficial to the manufacture of NFC communication equipment realizing lightweight, miniaturization, slimming.
Chinese patent CN203134979U discloses a kind of NFC combined antenna for mobile phone mobile payment, relate to the antenna of mobile communication equipment, this NFC combined antenna comprises PCB coil, skeleton, around the coiled wire-wound coil on skeleton, two coils connect pad and two antenna ports, described skeleton is provided with two coils and connects pad, the two ends that the two ends of PCB coil respectively connect pad and coiled wire-wound coil by a coil are connected in parallel, the magnetic line of force direction of coiled wire-wound coil is vertical with the magnetic line of force direction of PCB coil, two coils connect pad and respectively extend an antenna port.This utility model can break away from the shielding of barrier metallization, ensures the transmission of NFC signal, enhances the handset compatibility of antenna, without the need to by other auxiliary antenna product, can production cost be reduced, improve the convenience that consumer uses full card, promote the experience of swiping the card of consumer.
Summary of the invention
Object of the present invention be exactly provide to overcome defect that above-mentioned prior art exists a kind of structure simple, be easy to the three-dimensional NFC antenna of installing, anti-metal interference performance is strong.
Object of the present invention can be achieved through the following technical solutions:
A kind of three-dimensional NFC antenna, be built in terminal equipment inside, described NFC antenna comprises magnetic-permeable material plate and copper wires, described copper wires is wrapped on magnetic-permeable material plate, form LC oscillation circuit, the two ends of described copper wires are connected with terminal equipment inside as contact point, the track lengths of described copper wires forms inductance, the winding space that copper wires is wound around forms electric capacity, the winding space that the track lengths of adjustment copper wires and copper wires are wound around, the resonance of control LC oscillation circuit, thus convert the electrical signal to electromagnetic form Signal transmissions is gone out, namely make use of magnetic-coupled mode to communicate.
Described magnetic-permeable material plate and copper wires are packaged as a whole by encapsulation base material.
Described copper wires carries out cabling around magnetic-permeable material plate upper and lower surface.
The direction of the magnetic line of force is controlled by the direction of routing changing copper wires.
By changing the inductance value of the number of turn adjustment LC oscillation circuit that copper wires is wound around.
The coil thickness that described copper wires is wrapped on magnetic-permeable material plate is greater than 0.035mm.
The material of described magnetic-permeable material plate, shape, size, thickness all can adjust according to the profile of terminal equipment.
Copper wires is wrapped in magnetic-permeable material plate surface, the overwhelming majority of the magnetic line of force can be transmitted by magnetic-permeable material plate, magnetic-permeable material plate also can improve the Q value of antenna, magnetic-permeable material plate also can be processed by abnormity, by processing the shape of rear magnetic-permeable material plate, thus control the direction and intensity of the magnetic line of force.
Changed the inductance value of LC oscillation circuit by the track lengths (being also just equivalent to coil turn) adjusting copper wires, changed the capacitance of LC oscillation circuit by the gap of adjustment copper wires winding around, thus control the effect of resonance.
When using antenna of the present invention, make full use of equipment metal shell shape, change the strongest direction of the magnetic line of force, lower the coupling of NFC antenna with metal.
Compared with prior art, NFC antenna manufacture method of the present invention is simple, and can work independently (not relying on other environmental factor resonance), and design takes up room little, and be easy to install, anti-metal interference performance is strong, can meet the user demand of NFC and RFID.
Accompanying drawing explanation
Fig. 1 is the structural representation of three-dimensional NFC antenna of the present invention.
In figure, 1 is magnetic-permeable material plate, and 2 is copper wires, and 3 is contact point.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
A kind of three-dimensional NFC antenna, be built in terminal equipment inside, structure as shown in Figure 1, NFC antenna comprises magnetic-permeable material plate 1 and copper wires 2, copper wires 2 is wrapped on magnetic-permeable material plate 1, form LC oscillation circuit, the two ends of copper wires 2 are connected with terminal equipment inside as contact point 3, the track lengths of copper wires 2 forms inductance, the winding space that copper wires 2 is wound around forms electric capacity, the winding space that the track lengths of adjustment copper wires 2 and copper wires 2 are wound around, the resonance of control LC oscillation circuit, thus convert the electrical signal to electromagnetic form Signal transmissions is gone out, namely make use of magnetic-coupled mode to communicate.Wherein, magnetic-permeable material plate 1 and copper wires 2 are packaged as a whole by encapsulation base material.Copper wires 2 carries out cabling around magnetic-permeable material plate 1 upper and lower surface.
The direction of the magnetic line of force is controlled by the direction of routing changing copper wires 2.The inductance value of LC oscillation circuit is changed by the track lengths (being also just equivalent to coil turn) adjusting copper wires 2, the capacitance of LC oscillation circuit is changed by the gap of adjustment copper wires 2 winding around, to reach high inductance, the effect of low resistance, thus the effect controlling resonance.
The coil thickness that copper wires 2 is wrapped on magnetic-permeable material plate 1 is greater than 0.035mm.The material of magnetic-permeable material plate 1, shape, size, thickness all can adjust according to the profile of terminal equipment.Copper wires 2 is wrapped in magnetic-permeable material plate 1 surface, the overwhelming majority of the magnetic line of force can be transmitted by magnetic-permeable material plate 1, magnetic-permeable material plate 1 also can improve the Q value of antenna, magnetic-permeable material plate 1 also can be processed by abnormity, by processing the shape of rear magnetic-permeable material plate 1, thus control the direction and intensity of the magnetic line of force.
When using antenna of the present invention, make full use of equipment metal shell shape, change the strongest direction of the magnetic line of force, lower the coupling of NFC antenna with metal.
Adopt the NFC antenna of the present embodiment, under metal environment and nonmetal environment, the communication distance that 13.56MHz is far away can realize good communication effect.
Claims (6)
1. a three-dimensional NFC antenna, be built in terminal equipment inside, it is characterized in that, described NFC antenna comprises magnetic-permeable material plate and copper wires, described copper wires is wrapped on magnetic-permeable material plate, form LC oscillation circuit, the two ends of described copper wires are connected with terminal equipment inside as contact point, the track lengths of described copper wires forms inductance, the winding space that copper wires is wound around forms electric capacity, the winding space that the track lengths of adjustment copper wires and copper wires are wound around, the resonance of control LC oscillation circuit, thus convert the electrical signal to electromagnetic form Signal transmissions is gone out.
2. the three-dimensional NFC antenna of one according to claim 1, is characterized in that, described magnetic-permeable material plate and copper wires are packaged as a whole by encapsulation base material.
3. the three-dimensional NFC antenna of one according to claim 1, is characterized in that, described copper wires carries out cabling around magnetic-permeable material plate upper and lower surface.
4. the three-dimensional NFC antenna of one according to claim 1, is characterized in that, is controlled the direction of the magnetic line of force by the direction of routing changing copper wires.
5. the three-dimensional NFC antenna of one according to claim 1, is characterized in that, by changing the inductance value of the number of turn adjustment LC oscillation circuit that copper wires is wound around.
6. the three-dimensional NFC antenna of one according to claim 1, is characterized in that, the coil thickness that described copper wires is wrapped on magnetic-permeable material plate is greater than 0.035mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310608735.8A CN104659473A (en) | 2013-11-25 | 2013-11-25 | Three-dimensional NFC (Near Field Communication) antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310608735.8A CN104659473A (en) | 2013-11-25 | 2013-11-25 | Three-dimensional NFC (Near Field Communication) antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104659473A true CN104659473A (en) | 2015-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310608735.8A Pending CN104659473A (en) | 2013-11-25 | 2013-11-25 | Three-dimensional NFC (Near Field Communication) antenna |
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| CN (1) | CN104659473A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106450675A (en) * | 2016-08-24 | 2017-02-22 | 上海德门电子科技有限公司 | NFC (Near Field Communication) antenna with dual-ring structure and mobile phone employing antenna |
| CN109994824A (en) * | 2017-12-29 | 2019-07-09 | 深圳市海德门电子有限公司 | A kind of copper sheet extends out type around wire antenna and its application |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106450675A (en) * | 2016-08-24 | 2017-02-22 | 上海德门电子科技有限公司 | NFC (Near Field Communication) antenna with dual-ring structure and mobile phone employing antenna |
| CN106450675B (en) * | 2016-08-24 | 2023-09-29 | 上海德门电子科技有限公司 | NFC antenna with double-coil structure and mobile phone using same |
| CN109994824A (en) * | 2017-12-29 | 2019-07-09 | 深圳市海德门电子有限公司 | A kind of copper sheet extends out type around wire antenna and its application |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150527 |
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| RJ01 | Rejection of invention patent application after publication |