CN103515704A - Near field communication antenna and electronic equipment - Google Patents
Near field communication antenna and electronic equipment Download PDFInfo
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- CN103515704A CN103515704A CN201210216270.7A CN201210216270A CN103515704A CN 103515704 A CN103515704 A CN 103515704A CN 201210216270 A CN201210216270 A CN 201210216270A CN 103515704 A CN103515704 A CN 103515704A
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Abstract
The invention belongs to the antenna field and discloses a near field communication antenna. The near field communication antenna comprises an insulating substrate with a bearing surface, and a coil arranged on the bearing surface, wherein both ends of the coil form two feeding points; and the coil is partially provided with at least one magnetic piece. As the realization effects of the magnetic piece partially arranged on the coil are the same as that of a whole piece of magnetic piece, space can be effectively reduced and production cost is saved. The invention further discloses electronic equipment applying the near field communication antenna. Under the condition that the near field communication antenna can save space, there is enough space for accommodating other components, or the volume of the electronic equipment is reduced, and the production cost is saved.
Description
Technical field
The invention belongs to field of antenna, be specifically related to a kind of near-field communication aerial and apply its electronic equipment.
Background technology
Near-field communication (NFC, Near Field Communication), is that a kind of electromagnetic induction transmitting-receiving electromagnetic wave that utilizes is realized the technology of close range wireless communication between electronic equipment, and has expedited the emergence of thus the electronic equipments such as mobile phone of near field payment function.It has changed the mode that people use some daily life equipment to a great extent, particularly uses the mode of credit card, key and cash.
In the NFC of electronic equipment antenna product, especially in mobile phone NFC antenna, metal device and external magnetic field are larger on the impact of NFC antenna, conventionally need to increase at the back side of antenna that signal that full wafer magnetic sheet (ferrite, inhale ripple material) strengthens antenna receives and shielded metal device affects antenna, because the area of NFC antenna is conventionally larger, the cost of magnetic sheet can be in any more, causes the cost of whole antenna very high.Because magnetic sheet has certain thickness, taken more limited space simultaneously.How solving the deficiency of above-mentioned technology, is that current NFC field of antenna is expected the problem solving.
Summary of the invention
Technical problem to be solved by this invention is to overcome the deficiencies in the prior art, thereby provides a kind of low cost, the little near-field communication aerial that takes up room, and the electronic equipment of applying this antenna.
For solving the problems of the technologies described above, the invention provides following technical scheme:
, comprising: have loading end insulated substrate, be arranged on the coil on loading end, two of described coil ends form two distributing points, are partly provided with at least a slice magnetic conduction sheet on described coil.
The invention also discloses a kind of electronic equipment, comprise above-mentioned near-field communication aerial.
Compared with prior art, the present invention has following beneficial effect: the near field communication antenna that the embodiment of the present invention provides, on coil, be partly provided with at least a slice magnetic conduction sheet, in experimental verification on coil, be partly provided with magnetic conduction sheet and full wafer magnetic conduction sheet and realizing effect identical in the situation that, can effectively reduce antenna takes up room, on coil top, divide magnetic conduction sheet is set compares with full wafer magnetic sheet, also more cost-saving.Apply the electronic equipment of this near-field communication aerial, at near-field communication aerial, take up room reduce in the situation that, can have enough spaces to hold other components and parts, or reduce the volume of electronic equipment, also saved cost simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation that the present invention first implements near-field communication aerial.
Fig. 2 is the structural representation that the present invention second implements near-field communication aerial.
Fig. 3 is the structural representation that the present invention the 3rd implements near-field communication aerial.
Fig. 4 is the structural representation that the present invention the 4th implements near-field communication aerial.
Fig. 5 is the structural representation that the present invention the 5th implements near-field communication aerial.
Fig. 6 is the structural representation that the present invention the 6th implements near-field communication aerial.
Fig. 7 is each layer of structural representation of embodiment of the present invention near-field communication aerial.
Embodiment
In order to make technical problem solved by the invention, technical scheme and beneficial effect clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The invention discloses a kind of near-field communication aerial, Fig. 1 to Fig. 6 is the structural representation of six embodiment near-field communication aerials of the present invention, this near-field communication aerial comprises: have loading end insulated substrate 10, be arranged on the coil 20 on loading end, two ends of described coil form two distributing points 21, and on described coil 20, are partly provided with at least a slice magnetic conduction sheet 50.
Through a large amount of experimental verification, on coil, be partly provided with magnetic conduction sheet and full wafer magnetic conduction sheet realizing effect identical in the situation that, can effectively reduce antenna and take up room, on coil top, divide magnetic conduction sheet is set compares with full wafer magnetic sheet, also more cost-saving.
The antenna size 30mm*40mm of take carries out experimental test as example, wherein whole cover antenna regions magnetic conduction sheet area used is 1200 square millimeters, it is example that local cover antenna region magnetic conduction sheet be take 2 magnetic conduction sheets, the length of every magnetic conduction sheet is 40mm, wide is 8mm, the area of required like this magnetic conduction sheet is 40*8*2=640 square millimeter, accounts for 50% left and right of whole antenna area.The NFC antenna of needs test is placed in to EMV near field magnetic circle measurement system together with mobile phone model machine, will the mobile phone centering coordinate (0,0,0) of NFC antenna be housed, then modulating equipment is tested, and test result is as follows:
Above data show, are not that the magnetic conduction sheet that people think is all the time larger, and cover antenna region is more, and test result is better.On coil, be partly provided with magnetic conduction sheet identical with the effect that the test of full wafer magnetic conduction sheet obtains, all can be by test.And, on coil, be partly provided with magnetic conduction sheet and can effectively reduce antenna and take up room, and cost-saving.
Usually, during the work of NFC antenna, because the metal device in device therefor is in NFC alternating magnetic field, metal device will produce eddy current, these eddy current meeting consumed energies, thus cause NFC antenna off resonance (detuning), reduced the quality factor of antenna.At this time, we just need to increase magnetic conduction sheet and reduce the impact of metal device on NFC antenna, and magnetic conduction sheet can disturb, absorb the magnetic flux of unwanted frequency range and increase coil by shielded electronic equipment (for example mobile phone) interior metal device to NFC antenna performance.Because the metal device present position in the electronic equipment of each NFC antenna used is different, at diverse location, stick magnetic conduction sheet targetedly and will play good effect.Therefore on the other hand, also can there is magnetic loss in magnetic conduction sheet itself, and when covering whole antenna area with large area magnetic conduction sheet, its magnetic loss is also larger, is not that with magnetic conduction sheet, to cover the effect of whole antenna area best, but need to sticks in part suitable magnetic conduction sheet.
In the present embodiment, the coil 20 of take surrounds rectangle and describes as example on described loading end:
Magnetic conduction sheet described in Fig. 2 50 is L-type, and described magnetic conduction sheet is a slice, and described magnetic conduction sheet 50 is arranged on described rectangle away from described distributing point 21Yi Ge angle.In a further embodiment, described distributing point 21 is arranged on the place at the Yi Ge angle of coil 20 rectangle that forms; This L-type magnetic conduction sheet has improved the utilance of magnetic conduction sheet to a great extent, and meanwhile, this L-type magnetic conduction sheet has been brought into play the splendid performance of antenna.
The magnetic conduction sheet 50 of L-type also can be relatively large, enough covers the San Ge angle of the rectangle except the angle at distributing point 21 places, as shown in Figure 3.The magnetic conductance that the magnetic loss of bringing for balance magnetic conduction sheet and magnetic conduction sheet strengthen to coil antenna, experimental test proves that the effect that this magnetic conduction sheet covers is best.
In other embodiments, the magnetic conduction sheet of L-type also can be two, and described magnetic conduction sheet is arranged on the Liang Ge angle of described rectangle away from described distributing point, as shown in Figure 4 and Figure 5.L-type magnetic conduction sheet in Fig. 4 is larger, and magnetic conduction sheet has covered other San Ge limits except distributing point 21 limits, place.When antenna coverage areas is larger, in order effectively to utilize magnetic conduction sheet, can be divided into two L-type magnetic conduction sheets, rationally utilize the clear area of L-type magnetic conduction sheet.As less in the L-type magnetic conduction sheet in Fig. 5, this magnetic conduction sheet 50 has only covered two relative angles of rectangle.Due to the impact of structure, antenna may cover a Ge compare great region, is meeting under the prerequisite of antenna function, by diagonal angle, designs the cost that pair of L type magnetic conduction sheet reduces magnetic conduction sheet.
In other embodiments, described magnetic conduction sheet 50 is U-shaped, and described magnetic conduction sheet is arranged on the San Tiao limit of rectangle away from described distributing point, as shown in Figure 6.U-shaped is the distortion of two L-type magnetic conduction sheets, when being necessary when adjacent Liang Ge angle packs magnetic conduction sheet into, for brief introduction assembly technology, can replace two L-type magnetic conduction sheets with a U-shaped magnetic conduction sheet.
Below with a Mini NFC antenna, to mount difform magnetic sheet in a mobile phone environment, to test the data that obtain:
Because the various embodiments described above of the present invention are that part mounts, on coil top, divide and be provided with magnetic conduction sheet, avoided unnecessary wasted real estate magnetic sheet, largely improved stock utilization, under the suitable prerequisite of performance, magnetic sheet memorandum cost is more than 30%.When making the magnetic conduction sheet of difformity size, can design according to practical situations the size and dimension of magnetic conduction sheet, in diverse location part, stick targetedly the magnetic conduction sheet of required shape, thereby reach reduction magnetic loss, magnetic loss is minimized and maximizing efficiency.In concrete enforcement, the modes such as available cross cutting, punching press cut into needed shape, and described magnetic sheet can use the methods such as slug type, curtain coating to make.Above-described embodiment can make the NFC antenna overall losses in alternating magnetic field reduce, thereby improves the communication function (raising communication distance) of NFC antenna.
Fig. 7 is each layer of structural representation of embodiment of the present invention near-field communication aerial.In the present embodiment, coil 20 can adopt a kind of of copper, aluminium, silver slurry or above-mentioned alloy, and by techniques such as etching, printing, plating, chemical depositions, make, and add coating on its surface, as megohmite insulants such as ink, wear prevention or short circuit.Insulated substrate 10 adopts PI(polyimides, polymide), PET(PETG, polyethylene terephthalate), a kind of in FR4.FR-4 is a kind of code name of flame resistant material grade, the meaning of representative is resin material must can be from a kind of material specification of horizontal blanking through fired state, it is not a kind of title material, but a kind of material rate, therefore at present general circuit plate FR-4 grade material used just has very many kinds, but majority is all epoxy resin with so-called four functions, adds the composite material that filler (Filler) and glass fibre are made.
On coil 20 place layers, be also provided with solder mask 30, the circuit of solder mask 30 in can protection circuit layer is not oxidized, partial short-circuit, prevent from polluting etc.On solder mask 30, be provided with magnetic conduction sheet 50.Magnetic conduction sheet 50 is fixed on solder mask 30 by the first adhered layer 40.The first adhered layer 40 wherein can be the stickums such as glue or double faced adhesive tape.Magnetic conduction sheet 50 can be ferrite, and by magnetic, by mode moulding such as the tape casting or sintering, its effect is to strengthen magnetic flux on the one hand, improves the Q value of antenna, has strengthened antenna reception performance, on the other hand can the impact of shielded metal material on antenna.The one side relative with insulated substrate 10 loading ends can also be provided with the second adhered layer 60, can paste on required equipment by convenient antenna.
Because the ferrite of magnetic conduction sheet by easy magnetic conduction forms; because magnetic sheet is frangible; area is larger; yield is lower; embodiments of the invention, owing to being the local magnetic sheet that uses, can cover layer protecting film on magnetic conduction sheet surface, and wherein diaphragm is by PI (Polyimide; polyimides), PET(Polyethylene terephthalate, poly terephthalic acid class plastics) etc. material form.Can protect magnetic conduction sheet not damaged.
The present invention also provides a kind of electronic equipment, comprises above-mentioned near-field communication aerial.Apply the electronic equipment of this near-field communication aerial, in the situation that near-field communication aerial reduces to take up room, can have enough spaces to hold other components and parts, or reduce the volume of electronic equipment, and cost-saving.Described electronic equipment is preferably mobile phone.Certainly, can be also other electronic equipments of application near-field communication aerial.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a near-field communication aerial, comprising: have loading end insulated substrate, be arranged on the coil on loading end, two ends of described coil form two distributing points, it is characterized in that, are partly provided with at least a slice magnetic conduction sheet on described coil.
2. near-field communication aerial according to claim 1, is characterized in that, described coil surrounds rectangle on described loading end.
3. near-field communication aerial according to claim 2, is characterized in that, described magnetic conduction sheet is two, and described magnetic conduction sheet is bar shaped, and described two bar shaped magnetic conduction sheets are separately positioned on the relative Liang Tiao limit of rectangle away from distributing point.
4. near-field communication aerial according to claim 2, is characterized in that, described magnetic conduction sheet is L-type.
5. near-field communication aerial according to claim 4, is characterized in that, described magnetic conduction sheet is a slice, and described magnetic conduction sheet is arranged on the Yi Ge angle of described rectangle away from described distributing point.
6. near-field communication aerial according to claim 4, is characterized in that, described magnetic conduction sheet is two, and described magnetic conduction sheet is arranged on the Liang Ge angle of described rectangle away from described distributing point.
7. near-field communication aerial according to claim 2, is characterized in that, described magnetic conduction sheet is U-shaped, and described magnetic conduction sheet is arranged on the San Tiao limit of rectangle away from described distributing point.
8. according to the near-field communication aerial described in claim 1-7 any one, it is characterized in that, on the layer of coil place, be also provided with solder mask, described magnetic conduction sheet is arranged on described solder mask.
9. an electronic equipment, is characterized in that, comprises the near-field communication aerial described in claim 1-8 any one.
10. near-field communication aerial according to claim 9, is characterized in that, described electronic equipment is mobile phone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210216270.7A CN103515704A (en) | 2012-06-27 | 2012-06-27 | Near field communication antenna and electronic equipment |
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| CN201210216270.7A CN103515704A (en) | 2012-06-27 | 2012-06-27 | Near field communication antenna and electronic equipment |
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| CN103515704A true CN103515704A (en) | 2014-01-15 |
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| CN201210216270.7A Pending CN103515704A (en) | 2012-06-27 | 2012-06-27 | Near field communication antenna and electronic equipment |
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Cited By (8)
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| CN104953240A (en) * | 2014-03-28 | 2015-09-30 | 比亚迪股份有限公司 | Mobile terminal and NFC antenna |
| CN105119036A (en) * | 2015-09-18 | 2015-12-02 | 深圳市信维通信股份有限公司 | Near-field communication and wireless charging integrated antenna based on metallic housing |
| CN105703804A (en) * | 2014-12-16 | 2016-06-22 | 英特尔公司 | Enhancing data rate or range of near field communication using differential coil topology |
| 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 |
| CN106663524A (en) * | 2014-05-30 | 2017-05-10 | 康宁股份有限公司 | Wireless charging device for an electronic device |
| CN110247166A (en) * | 2019-05-24 | 2019-09-17 | 禾邦电子(苏州)有限公司 | A kind of NFC antenna and mobile terminal |
| CN111211407A (en) * | 2018-11-21 | 2020-05-29 | 法雷奥舒适驾驶助手公司 | Antenna assembly and wireless charging device including the same |
| CN115102581A (en) * | 2022-06-21 | 2022-09-23 | 维沃移动通信有限公司 | Electronic device |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104953240B (en) * | 2014-03-28 | 2019-04-19 | 比亚迪股份有限公司 | Mobile terminal and NFC antenna |
| WO2015143884A1 (en) * | 2014-03-28 | 2015-10-01 | 比亚迪股份有限公司 | Mobile terminal and nfc antenna |
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| CN106663524B (en) * | 2014-05-30 | 2020-09-08 | 康宁股份有限公司 | Wireless charging device for electronic device |
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| CN106663524A (en) * | 2014-05-30 | 2017-05-10 | 康宁股份有限公司 | Wireless charging device for an electronic device |
| US10002709B2 (en) | 2014-05-30 | 2018-06-19 | Corning Incorporated | Wireless charging device for an electronic device |
| CN105703804A (en) * | 2014-12-16 | 2016-06-22 | 英特尔公司 | Enhancing data rate or range of near field communication using differential coil topology |
| CN105703804B (en) * | 2014-12-16 | 2018-08-28 | 英特尔公司 | The data rate or range of near-field communication are improved using difference coil topology |
| CN105119036B (en) * | 2015-09-18 | 2019-03-15 | 深圳市信维通信股份有限公司 | A kind of near-field communication and wireless charging integral antenna based on metal rear shell |
| CN105119036A (en) * | 2015-09-18 | 2015-12-02 | 深圳市信维通信股份有限公司 | Near-field communication and wireless charging integrated antenna based on metallic housing |
| 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 |
| CN111211407A (en) * | 2018-11-21 | 2020-05-29 | 法雷奥舒适驾驶助手公司 | Antenna assembly and wireless charging device including the same |
| CN111211407B (en) * | 2018-11-21 | 2024-05-28 | 法雷奥舒适驾驶助手公司 | Antenna assembly and wireless charging device comprising such an antenna assembly |
| CN110247166A (en) * | 2019-05-24 | 2019-09-17 | 禾邦电子(苏州)有限公司 | A kind of NFC antenna and mobile terminal |
| CN115102581A (en) * | 2022-06-21 | 2022-09-23 | 维沃移动通信有限公司 | Electronic device |
| CN115102581B (en) * | 2022-06-21 | 2024-05-14 | 维沃移动通信有限公司 | Electronic equipment |
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