CN103762424A - Nfc antenna - Google Patents
Nfc antenna Download PDFInfo
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- CN103762424A CN103762424A CN201410007643.9A CN201410007643A CN103762424A CN 103762424 A CN103762424 A CN 103762424A CN 201410007643 A CN201410007643 A CN 201410007643A CN 103762424 A CN103762424 A CN 103762424A
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- nfc antenna
- electric conduction
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- conduction routing
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Abstract
The invention discloses an NFC antenna which is low in cost, small in occupied space and capable of generating magnetic lines parallel to the face of a PCB. An antenna coil is formed by conductive lines, conductive connecting lines and magnetic cores, wherein the conductive lines are evenly arranged on the surface of the PCB in a tight attaching mode at intervals, the conductive connecting lines are connected between the heads and the tails of the adjacent conductive lines in an overlapped mode, stretch outside the surface of the PCB and are in an arc shape, and the magnetic cores are arranged between the conductive connecting lines and the conductive lines in a penetrating mode. The NFC antenna is small in size and few in consumable item, the magnetic lines generated by the NFC antenna are parallel to the face of the PCB, and the transmission and receiving of signals of the NFC antenna are facilitated. The NFC antenna is simple in manufacturing technique, the conductive lines and the conductive connecting lines are connected by adopting a bonding technique, operation is simple and convenient, connection is firm and not prone to separating, and high-precision wire wrapping needed in wire wrapping and metalizing processing procedures carried out on the leading-out end of the coil in the prior art are omitted. The magnetic cores of the NFC antenna can be made to be quite fine and cannot be broken. The NFC antenna has the advantages of being high in quality and qualified rate, low in cost and the like.
Description
Technical field
The present invention relates to electronic devices and components, particularly a kind of close range wireless communication antenna (claiming again NFC antenna).
Background technology
NFC aerial coil of the prior art, be on pcb board or FPC plate (flexible PCB plate) surface, make flat shape pattern coil 5(as shown in Figure 1), then on another surface label, play the magnetic material of shielding action.This type of antenna not only consumptive material is many, cost is high, the plane space that takies is large to cannot miniaturization, and the most important point is, the magnetic line of force 6 that it produces is all perpendicular to coil place plane, cannot produce the magnetic line of force 6 with coil plane parallel of living in, due to the Metals in Environments distribution of material complexity at card series products, the parts such as such as buckle are all that metal is made, can produce serious decay to the magnetic line of force 6 perpendicular to pcb board face, the magnetic line of force 6 that is only parallel to metal interface can pass through, therefore, it is not suitable for card electronic product, the magnetic line of force 6 of such NFC aerial coil distributes as shown in Figure 2.
Another kind is traditional winding-type NFC aerial coil, it is that coil is made in coiling on magnetic core, conventionally use high-precision coil winding machine and superfine enamelled wire coiling on magnetic core, the deficiency of its existence is: when magnetic core is very thin, easily fracture, equally, cannot be applicable to the electronic product of miniaturization, but also will carry out metallic electrode processing to the magnetic core at coil exit place, (for example in SMD patch products, all want manufacturing terminal electrode, could be affixed on pcb board and weld by tin cream), cause whole complex manufacturing, yield poorly, cost is high.
Summary of the invention
The technical problem to be solved in the present invention be to provide a kind of cost low, take up room little and can produce the NFC antenna that is parallel to the pcb board face magnetic line of force.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is:
NFC antenna of the present invention, comprise pcb board and be arranged on the coil on this pcb board, described coil by being close at least three electric conduction routing that pcb board surface and interval evenly arrange, be overlapped between adjacent described electric conduction routing head and the tail and stretch out and outside described pcb board surface, be the conductive connecting line of arcuation and be placed through between described conductive connecting line and electric conduction routing and the magnetic core being fixed on pcb board forms, described conductive connecting line is electrically connected with described electric conduction routing joint.
Described conductive connecting line is made by gold thread, silver-colored line or alloy wire.
Described electric conduction routing is made by conductive thread or conductive film.
Described electric conduction routing is made by goldleaf, Copper Foil, aluminium foil.
Described magnetic core is that Ni-Zn soft magnetic ferrite is made.
Described magnetic core is near magnetic material 13.56Mhz centre frequency with good high frequency performance, and the representative value of its magnetic permeability real part u ' is greater than 120, magnetic permeability imaginary part u " representative value is less than 5.
The shape of described magnetic core can be cuboid or cylinder or polygon cylinder.
Between described conductive connecting line and electric conduction routing, electrically connect as gold wire bonding structure, aluminium wire bonding structure or B alloy wire bonding structure.
Compared with prior art, the present invention adopts the electric conduction routing evenly arranging by being close to pcb board interval, arc portion be suspended in the outer and conductive connecting line that is connected with electric conduction routing of pcb board face and be placed through electric conduction routing and conductive connecting line between the coil that forms of magnetic core in the space that forms, not only make this aerial coil volume little, consumptive material is few, and the magnetic line of force of its generation is parallel with pcb board face, the parallel flux lines producing easily appears from block the narrow and small gap of series products, reduce the decay of metal parts to the magnetic line of force such as buckle in card series products, this will be conducive to transmission and the reception of NFC aerial signal.It is particularly useful in the NFC application of the very narrow electronic products in space such as SD card, SIM card applicable in the little electronic product of volume.Manufacturing process of the present invention is simple, adopt bonding techniques that electric conduction routing is connected and is connected with conduction, not only easy and simple to handle, and connect firm difficult disengaging, also save required high accuracy coiling and the enterprising row metal handling procedure of the magnetic core at coil exit place of winding around in prior art.In addition, magnetic core is placed in the space being formed by electric conduction routing and conductive connecting line and by viscose glue and is fixed on pcb board, and not as being wound around by wire in prior art, therefore tiny magnetic core also there will not be the phenomenon being fractureed again.The present invention has the significant advantages such as output is high, qualification rate is high, cost is low.
Accompanying drawing explanation
Fig. 1 is plane FPC coil schematic diagram of the prior art.
Fig. 2 is the magnetic line of force distribution map of the FPC coil in Fig. 1.
Fig. 3 is the schematic diagram of NFC antenna of the present invention.
Fig. 4 is the magnetic line of force distribution map of NFC antenna of the present invention.
Fig. 5 is the typical magnetic permeability spectrogram of core material of the present invention.
Reference numeral:
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As shown in Fig. 3,4,5, NFC antenna of the present invention (claiming again NFC antenna), preferably made by goldleaf, Copper Foil, aluminium foil by electric conduction routing 2 described in pcb board 1 or the made electric conduction routing 2(of FPC plate (flexible PCB plate 1), conductive thread or conductive film), gold thread, silver-colored line or made conductive connecting line 3 and the made magnetic core 4 of Ni-Zn soft magnetic ferrite of alloy wire form, electric conduction routing 2, conductive connecting line 3 and magnetic core 4 form aerial coil.
Described electric conduction routing 2 is close to pcb board 1 spaced surface evenly and is fixed on pcb board 1, its fixed form can adopt gluing or some glue, electric conduction routing 2 is many (being greater than three), preferred angled is set up in parallel, 2 points of head ends of every electric conduction routing and tail end, the head end of Article 1 and the tail end of the last item are electrically connected with pcb board 1.
Described conductive connecting line 3 is shaped as arc shape, its quantity is identical with described electric conduction routing 2, 3 points of head ends of every conductive connecting line, arc portion and tail end, the mode of stretching out described pcb board 1 surface with its arc portion is connected across between adjacent two electric conduction routing 2, preferably arc portion is perpendicular to described pcb board 1 surface, concrete connected mode is: the tail end of the Article 1 electric conduction routing 2 on 1 of the head end of Article 1 conductive connecting line 3 and pcb board joins, the head end of the Article 2 electric conduction routing 2 on 1 of the tail end of this conductive connecting line 3 and pcb board joins, the rest may be inferred, through bonding techniques, the phase contact of electric conduction routing 2 and conductive connecting line 3 is coupled together again, form the helical coil of a complete electrical connection.
According to hand thumb rule, the magnetic line of force 6 major parts that this helical coil produces and described pcb board 1 surface parallel (as shown in Figure 4).
Described bonding techniques refers at conductive connecting line 3 and forms with electric conduction routing 2 places of electrical connection the bonding structure consisting of spun gold, aluminium wire or B alloy wire.
Described magnetic core 4 is under near 13.56Mhz centre frequency, has the magnetic material of good high frequency performance, and the representative value of its magnetic permeability real part u ' is greater than 120, magnetic permeability imaginary part u " representative value is less than 5, typical magnetic permeability spectrogram (as shown in Figure 5).Its concrete shape is that cross section is rectangle, circle, ellipse, pentagon or hexagonal strip magnetic material, can be also necessarily required other special shape that has being proposed by client.It is very thin that magnetic core 4 can do, and places it in the space that the coil that consists of electric conduction routing 2 and conductive connecting line 3 encloses and be fixed on 1 of described pcb board with viscose glue.
It is long that described magnetic core 4 can be made into 10mm() × 0.7mm(is wide) × 0.7mm(is thick) cuboid magnetic stripe (or for this reason the cylindricality magnetic stripe of order of magnitude size).It,, as the subminaturization NFC antenna that can be integrated in mobile phone SD RAM (random access memory) card, not only have the advantages such as Q value is high, signal is strong, and it is less to have size, the advantage that cost is lower.
NFC antenna readwrite performance excellence of the present invention, can be by the mobile phone NFC functional test of various different models.
Claims (8)
1. a NFC antenna, comprise pcb board (1) and be arranged on the coil on this pcb board (1), it is characterized in that: described coil is by being close to evenly at least three electric conduction routing (2) of setting of pcb board (1) surface and interval, be overlapped between adjacent described electric conduction routing (2) head and the tail and stretch out outside described pcb board (1) surface, be the conductive connecting line (3) of arcuation and be placed through described conductive connecting line (3) and electric conduction routing (2) between and be fixed on magnetic core (4) formation on pcb board (1), described conductive connecting line (3) is electrically connected with described electric conduction routing (2) joint.
2. NFC antenna according to claim 1, is characterized in that: described conductive connecting line (3) is made by gold thread, silver-colored line or alloy wire.
3. NFC antenna according to claim 1, is characterized in that: described electric conduction routing (2) is made by conductive thread or conductive film.
4. NFC antenna according to claim 3, is characterized in that: described electric conduction routing (2) is made by goldleaf, Copper Foil, aluminium foil.
5. NFC antenna according to claim 1, is characterized in that: described magnetic core (4) is that Ni-Zn soft magnetic ferrite is made.
6. NFC antenna according to claim 5, it is characterized in that: described magnetic core (4) for having the magnetic material of good high frequency performance near 13.56Mhz centre frequency, the representative value of its magnetic permeability real part u ' is greater than 120, magnetic permeability imaginary part u " representative value is less than 5.
7. NFC antenna according to claim 5, is characterized in that: the shape of described magnetic core (4) can be cuboid or cylinder or polygon cylinder.
8. the NFC antenna as described in any one in claim 1-7, is characterized in that: between described conductive connecting line (3) and electric conduction routing (2), electrically connect as gold wire bonding structure, aluminium wire bonding structure or B alloy wire bonding structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410007643.9A CN103762424A (en) | 2014-01-08 | 2014-01-08 | Nfc antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410007643.9A CN103762424A (en) | 2014-01-08 | 2014-01-08 | Nfc antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103762424A true CN103762424A (en) | 2014-04-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410007643.9A Pending CN103762424A (en) | 2014-01-08 | 2014-01-08 | Nfc antenna |
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| Country | Link |
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| CN (1) | CN103762424A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105609947A (en) * | 2016-03-17 | 2016-05-25 | 青岛中科移动物联科技有限公司 | Miniature 433-MHz Archimedes planar single spiral antenna |
| CN106329109A (en) * | 2016-10-13 | 2017-01-11 | 北京握奇智能科技有限公司 | NFC antenna of card type Key |
| CN107293859A (en) * | 2016-04-13 | 2017-10-24 | 胜美达集团株式会社 | A kind of manufacture method of antenna assembly and the antenna assembly |
| CN109952579A (en) * | 2016-09-19 | 2019-06-28 | 洛格摩提公司 | RFID antenna and its production method |
| US11586261B2 (en) * | 2021-07-12 | 2023-02-21 | Dell Products L.P. | Information handling system thermal management integrated with glass material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201303054Y (en) * | 2008-08-27 | 2009-09-02 | 中兴通讯股份有限公司 | Electronic terminal device and near-field communication antenna thereof |
| CN102412872A (en) * | 2010-09-21 | 2012-04-11 | 英赛瑟库尔公司 | Nfc card for handheld device |
| CN203205542U (en) * | 2013-04-07 | 2013-09-18 | 武汉天喻信息产业股份有限公司 | Small embedded ferrite core NFC antenna |
| CN203277640U (en) * | 2012-08-09 | 2013-11-06 | 松下电器产业株式会社 | Antenna, antenna device and communication device |
-
2014
- 2014-01-08 CN CN201410007643.9A patent/CN103762424A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201303054Y (en) * | 2008-08-27 | 2009-09-02 | 中兴通讯股份有限公司 | Electronic terminal device and near-field communication antenna thereof |
| CN102412872A (en) * | 2010-09-21 | 2012-04-11 | 英赛瑟库尔公司 | Nfc card for handheld device |
| CN203277640U (en) * | 2012-08-09 | 2013-11-06 | 松下电器产业株式会社 | Antenna, antenna device and communication device |
| CN203205542U (en) * | 2013-04-07 | 2013-09-18 | 武汉天喻信息产业股份有限公司 | Small embedded ferrite core NFC antenna |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105609947A (en) * | 2016-03-17 | 2016-05-25 | 青岛中科移动物联科技有限公司 | Miniature 433-MHz Archimedes planar single spiral antenna |
| CN107293859A (en) * | 2016-04-13 | 2017-10-24 | 胜美达集团株式会社 | A kind of manufacture method of antenna assembly and the antenna assembly |
| CN109952579A (en) * | 2016-09-19 | 2019-06-28 | 洛格摩提公司 | RFID antenna and its production method |
| CN106329109A (en) * | 2016-10-13 | 2017-01-11 | 北京握奇智能科技有限公司 | NFC antenna of card type Key |
| US11586261B2 (en) * | 2021-07-12 | 2023-02-21 | Dell Products L.P. | Information handling system thermal management integrated with glass material |
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Application publication date: 20140430 |