CN107546467A - NFC antenna under complete closure metal slit environment - Google Patents
NFC antenna under complete closure metal slit environment Download PDFInfo
- Publication number
- CN107546467A CN107546467A CN201610497148.XA CN201610497148A CN107546467A CN 107546467 A CN107546467 A CN 107546467A CN 201610497148 A CN201610497148 A CN 201610497148A CN 107546467 A CN107546467 A CN 107546467A
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- China
- Prior art keywords
- back cover
- nfc antenna
- metal back
- gap
- complete closure
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- 239000002184 metal Substances 0.000 title claims abstract description 96
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 96
- 239000000463 material Substances 0.000 claims description 7
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 230000005672 electromagnetic field Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000004907 flux Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000003042 antagnostic effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000002984 plastic foam Substances 0.000 description 1
Abstract
The present invention relates to the NFC antenna under antenna technical field, in particular to complete closure metal slit environment, including metal back cover, NFC antenna coil, it is characterised in that through hole and T-shaped gap are provided with described metal back cover；The horizontal gap in the T-shaped gap in described metal back cover includes two termination horizontal gaps and a by-level gap, NFC antenna coil, which is coiled in, to be connected with the vertical clearance gap in the T-shaped gap in metal back cover on the outside of through hole, eliminate shielding of the metal back cover to NFC antenna, meanwhile improve antenna performance.
Description
Technical field
The present invention relates to antenna technical field, more particularly, to NFC antenna design in metal back cover.
Background technology
NFC (Near Field Communication) is a kind of short-distance wireless communication technology, by non-contact
Formula radio frequency identification (RFID) and the Technology Integration that interconnects develop.NFC antenna traditional at present is main
Covered after being covered in electronic product, but mobile phone, notebook, tablet personal computer with all-metal fuselage etc. disappears
Take electronic product prevalence, NFC antenna covers after being attached to metal material, does not have apertured feelings in through hole
Under condition, electromagnetic field caused by NFC antenna has greatly to be blocked by metal back cover, and NFC function is compared to non-
Metal can be far short of what is expected.So just need to reduce influence of the metal to NFC antenna in such a case so that
The performance of NFC antenna maximizes, and this is our focus on research direction from now on.
But after some appropriate processing have been carried out to metal back cover, a seam is such as opened in metal back cover
Gap, the electromagnetic field being completely reversed caused by virgin metal bonnet has been cut off at gap, while enhance aerial coil
Electromagnetic field, and then eliminate shielding action of the metal back cover to antenna, but gap of cracking is from metallic plate
Right side is reached in left side, namely metallic plate divide into two parts up and down, largely destroys metallic plate
Integrality, this destruction to metal back cover integrality undoubtedly have impact on the aesthetic feeling of metal fuselage equipment and strong
Degree.
The content of the invention
For above-mentioned technical problem, after proposing a kind of superior performance, metal can be kept
Lid integrality and the simple NFC antenna design of processing technology, realize that NFC signals are normal under metal environment
Transmission.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：
NFC antenna under complete closure metal slit environment, is arranged in mobile device, described mobile device
Including at least metal back cover, NFC antenna coil.Through hole is provided with described metal back cover, meanwhile,
A T-shaped gap is also opened up in metal back cover, metal back cover is divided into two parts, upper area and lower section
Region；Wherein, the horizontal gap in the T-shaped gap in described metal back cover includes two termination horizontal gaps
It is metal back cover upper area between termination horizontal gap and by-level gap with a by-level gap
With the connecting portion of lower zone；The vertical clearance gap in the T-shaped gap in described metal back cover and described gold
The through hole connection covered after category；Described NFC antenna coil is coiled in described metal back cover and institute
The outside of the through hole of the vertical clearance gap connection in the T-shaped gap stated.
Further, also set up between described NFC antenna coil and described metal back cover one layer it is nonmetallic
Material, the thickness of described nonmetallic materials are not less than 0.1mm.Generally, the thickness of nonmetallic materials is got over
Greatly, confrontation of the faradic magnetic flux of metal back cover on the electromagnetic field of NFC antenna coil influences more
It is small.
Further, described NFC antenna coil is the planar line that clockwise direction coiling from inside to outside forms
Circle.
Further, the width of the horizontal gap in the T-shaped gap in described metal back cover is 1-2mm.
Further, the length of the vertical clearance gap in the T-shaped gap in described metal back cover is 3-7mm.
Further, the width of the vertical clearance gap in the T-shaped gap in described metal back cover is not less than
1.0mm, the size in described T-shaped gap directly affects the magnetic field signal radiation of NFC antenna coil, special
It is not the vertical clearance gap in T-shaped gap, the width of vertical clearance gap is bigger, the magnetic field signal spoke of NFC antenna coil
Penetrate space just to increase, magnetic field signal radiation intensity is higher.
Further preferably, the length of the termination horizontal gap of the horizontal gap in described T-shaped gap is less than
5mm, the horizontal gap in the T-shaped gap is longer, metal back cover to the electromagnetic field antagonistic effect of NFC antenna just
It is smaller.
Further, described NFC antenna coil is shaped as rectangle either circle or other are any more
Side shape.
Further, the through hole set in described metal back cover is shaped as circular or other arbitrary shapes
Shape, the shape of the through hole set in described metal back cover is unrelated with the shape of described NFC antenna coil,
The through hole set in described metal back cover is mainly used in installing camera, flash lamp or other modules.
Further, the size of the upper area in described T-shaped gap is 7 ± 0.5mm.
Further, described nonmetallic materials are plastics.
It has the advantages that compared with prior art：
The present invention provides the NFC antenna under complete closure metal slit environment, is innovatively covered after applied metal
Through hole, through hole is connected using T-shaped gap, reach the effect for changing vortex flow direction distribution, and after applied metal
Cover that vortex in the same direction strengthens antenna performance in itself with NFC antenna, eliminate metal back cover to NFC antenna
Shielding action, realize NFC antenna function, and function admirable；Meanwhile the T-shaped gap of both ends closure, protect
The integrality of metal back cover has been demonstrate,proved, there is the features such as structure is attractive in appearance, and manufacture craft is simple.
Brief description of the drawings
Fig. 1 is the Eddy Distribution figure in the CURRENT DISTRIBUTION and metal rear shell of antenna when not cracking gap；
The electric current and Eddy Distribution schematic diagram of antenna when Fig. 2 is the NFC antenna work of the embodiment of the present invention；
Fig. 3 is NFC antenna structural representation of the embodiment based on metal back cover.
Wherein, the numbering of each part in the accompanying drawings is as follows：
1 is metal back cover, and 2 be NFC antenna coil, and 3 be T-shaped gap, and 4 be through hole, and 5 be plastic blister
Foam, 6 be termination horizontal gap, and 7 be by-level gap.
Embodiment
For the ease of it will be appreciated by those skilled in the art that making the present invention into one below in conjunction with drawings and Examples
Step describes in detail.It should be appreciated that specific embodiment described herein is used only for explaining the present invention, not
For limiting the present invention.
Described NFC antenna coil 2 is coiled in the outside of the through hole 4 in metal back cover 1, suitable from inside to outside
Hour hands coiling forms.
Refering to Fig. 3, the NFC antenna under complete closure metal slit environment, moved suitable for mobile phone, tablet personal computer etc.
In dynamic equipment, the mobile device comprises at least metal back cover 1, NFC antenna coil 2, described metal back cover
The through hole 4 of upper setting, and T-shaped gap 3, wherein, described through hole 4 can be used for installing camera, dodge
Metal back cover 1 is divided into two parts, the He of upper area 11 by light lamp or other modules, T-shaped gap 3
Lower zone 12, the wherein width of upper area 11 are 7mm.The horizontal gap bag in described T-shaped gap 3
Containing two termination horizontal gaps 31 and a by-level gap 32, termination horizontal gap 31 and by-level
It is the connecting portion of metal back cover upper area and lower zone between gap 32；In described metal back cover
The vertical clearance gap in T-shaped gap connects with the through hole 4.Described NFC antenna coil 2 is coiled in described
The outside of through hole 4 in metal back cover.
In addition, also set up one layer of 0.1mm between described NFC antenna coil 2 and described metal back cover 1
The plastic foam 5 of thickness, for reducing magnetic field caused by metal back cover to magnetic field caused by NFC antenna coil
Confrontation influence.
As shown in figure 1, under conditions of the gap that metal back cover is not opened, caused vortex in metal back cover
All with NFC antenna coil the sense of current in itself on the contrary, thus, metal back cover is to NFC antenna coil
Shielding action is produced, the signal of NFC antenna coil can not be delivered to the outside of metal back cover, it is,
In this case antenna can not normal work.
The present invention has innovatively opened up a T-shaped gap 3 penetrated with camera 4 in metal back cover 1, changes
Become the direction of vortex, eliminate shielding action of the metal back cover 1 to NFC antenna coil 2.Such as Fig. 2 institutes
Show, two vortex closed-loop paths are formed when NFC antenna coil 2 works, in metal back cover 1, are respectively gold
Belong to bonnet upper area vortex closed-loop path, metal back cover lower zone vortex closed-loop path.Wherein, it is described
Metal back cover upper area eddy current direction and described metal back cover decentralization region eddy current side
To opposite；Described metal back cover lower zone forms vortex closure with upper area by two connecting portions
Loop, offseted with the eddy current of described metal back cover upper area；Described metal back cover lower zone
The electric current in the direction of the vortex in domain and NFC antenna coil 2 itself is in the same direction, and T-shaped gap 3 blocks or cut off
The metal back cover upper area opposite with the sense of current of NFC antenna coil 2 is vortexed the influence to antenna.With
The vortex of NFC antenna coil 2 current direction identical metal back cover lower zone itself is served to antenna
The increased effect of magnetic flux, and then strengthen the performance of NFC antenna coil, in this case, metal back cover
1 serves the effect to the performance enhancement of NFC antenna coil 2 or amplification.
In addition, the performance of NFC antenna coil is also relevant with the size in gap, gap is bigger, NFC antenna coil
The increase of radiation magnetic flux, in the present embodiment, the horizontal joint in the T-shaped gap 3 in described metal back cover 1
The width of gap is 1.5mm；The width of the vertical clearance gap in described T-shaped gap is 1.0mm, width 5mm.
In the present embodiment, the through hole 4 in described metal back cover 1 is circular, the NFC being attached to outside it
Aerial coil 2 is rectangular planar structure.In addition, the shape of NFC antenna coil 2 with its in metal back cover 1
The shape of through hole 4 is unrelated corresponding to upper, and both shapes can be with identical, can also be different.
The beneficial effects of the present invention are：The through hole cleverly covered after applied metal, connected using gap logical
Hole reaches the effect for changing vortex flow direction distribution, and covers that vortex in the same direction increases in itself with antenna after applied metal
Strong antenna performance, shielding action of the metal back cover to NFC antenna is eliminated, have structure attractive in appearance, make work
Skill is simple, the features such as superior performance.
Claims (7)
1. the NFC antenna under complete closure metal slit environment, is arranged in mobile device, the mobile device is extremely
Include metal back cover, NFC antenna coil less, it is characterised in that：
Through hole is provided with described metal back cover, a T-shaped gap is also set up in the metal back cover；Wherein,
The horizontal gap in the T-shaped gap in described metal back cover is included in two termination horizontal gaps and one
Between horizontal gap；In the vertical clearance gap and the metal back cover in the T-shaped gap in described metal back cover
Through hole connection；
Described NFC antenna coil is coiled in the vertical lap seam with described T-shaped gap in described metal back cover
The outside of the through hole of gap connection.
2. the NFC antenna under complete closure metal slit environment as claimed in claim 1, it is characterised in that：Institute
One layer of nonmetallic materials are additionally provided between the NFC antenna coil stated and described metal back cover, it is described
The thickness of nonmetallic materials be not less than 0.1mm.
3. the NFC antenna under complete closure metal slit environment as described in claim 1-2 any one, it is special
Sign is：The coiling direction of described NFC antenna coil is coiling clockwise from inside to outside.
4. the NFC antenna under complete closure metal slit environment as described in claim 1-2 any one, it is special
Sign is：The width of the horizontal gap in the T-shaped gap in described metal back cover is 1-2mm.
5. the NFC antenna under complete closure metal slit environment as described in claim 1-2 any one, it is special
Sign is：The length of the vertical clearance gap in the T-shaped gap in described metal back cover is 3-7mm.
6. the NFC antenna under complete closure metal slit environment as described in claim 1-2 any one, it is special
Sign is：The width of the vertical clearance gap in the T-shaped gap in described metal back cover is not less than 1.0mm.
7. the NFC antenna under complete closure metal slit environment as described in claim 1-2 any one, it is special
Sign is：Described nonmetallic materials are plastics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610497148.XA CN107546467B (en) | 2016-06-29 | 2016-06-29 | NFC antenna in fully closed metal gap environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610497148.XA CN107546467B (en) | 2016-06-29 | 2016-06-29 | NFC antenna in fully closed metal gap environment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107546467A true CN107546467A (en) | 2018-01-05 |
| CN107546467B CN107546467B (en) | 2024-04-12 |
Family
ID=60966346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610497148.XA Active CN107546467B (en) | 2016-06-29 | 2016-06-29 | NFC antenna in fully closed metal gap environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107546467B (en) |
Citations (9)
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|---|---|---|---|---|
| CN203967240U (en) * | 2013-12-31 | 2014-11-26 | 惠州比亚迪实业有限公司 | A kind of mobile terminal |
| CN104993215A (en) * | 2015-06-01 | 2015-10-21 | 瑞声精密制造科技(常州)有限公司 | Nfc antenna structure |
| CN105024162A (en) * | 2015-07-08 | 2015-11-04 | 深圳市信维通信股份有限公司 | NFC antenna with metal rear shell |
| CN204905438U (en) * | 2015-09-21 | 2015-12-23 | 惠州硕贝德无线科技股份有限公司 | Metal backing lid antenna structure |
| DE102015115099A1 (en) * | 2014-10-20 | 2016-04-21 | Samsung Electronics Co., Ltd. | Antenna structures and electronic devices having the same |
| CN205211921U (en) * | 2015-10-15 | 2016-05-04 | 深圳市信维通信股份有限公司 | Near field coupling antenna structure with metal backshell |
| US20160134730A1 (en) * | 2014-11-12 | 2016-05-12 | Young-ki Lee | Housing of a mobile device, near field communication transceiver and mobile device |
| CN105680157A (en) * | 2014-12-04 | 2016-06-15 | Tdk株式会社 | Antenna device and portable electronic device using the same |
| CN206116604U (en) * | 2016-06-29 | 2017-04-19 | 禾邦电子(苏州)有限公司 | NFC antenna under environment of complete closure metal gap |
-
2016
- 2016-06-29 CN CN201610497148.XA patent/CN107546467B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203967240U (en) * | 2013-12-31 | 2014-11-26 | 惠州比亚迪实业有限公司 | A kind of mobile terminal |
| DE102015115099A1 (en) * | 2014-10-20 | 2016-04-21 | Samsung Electronics Co., Ltd. | Antenna structures and electronic devices having the same |
| US20160134730A1 (en) * | 2014-11-12 | 2016-05-12 | Young-ki Lee | Housing of a mobile device, near field communication transceiver and mobile device |
| CN105680157A (en) * | 2014-12-04 | 2016-06-15 | Tdk株式会社 | Antenna device and portable electronic device using the same |
| CN104993215A (en) * | 2015-06-01 | 2015-10-21 | 瑞声精密制造科技(常州)有限公司 | Nfc antenna structure |
| CN105024162A (en) * | 2015-07-08 | 2015-11-04 | 深圳市信维通信股份有限公司 | NFC antenna with metal rear shell |
| CN204905438U (en) * | 2015-09-21 | 2015-12-23 | 惠州硕贝德无线科技股份有限公司 | Metal backing lid antenna structure |
| CN205211921U (en) * | 2015-10-15 | 2016-05-04 | 深圳市信维通信股份有限公司 | Near field coupling antenna structure with metal backshell |
| CN206116604U (en) * | 2016-06-29 | 2017-04-19 | 禾邦电子(苏州)有限公司 | NFC antenna under environment of complete closure metal gap |
Non-Patent Citations (3)
| Title |
|---|
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|---|---|
| CN107546467B (en) | 2024-04-12 |
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