CN105119035B - Antenna structure with metal rear shell - Google Patents
Antenna structure with metal rear shell Download PDFInfo
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- CN105119035B CN105119035B CN201510551662.2A CN201510551662A CN105119035B CN 105119035 B CN105119035 B CN 105119035B CN 201510551662 A CN201510551662 A CN 201510551662A CN 105119035 B CN105119035 B CN 105119035B
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- 239000002184 metal Substances 0.000 title claims abstract description 136
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 136
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 4
- 239000010931 gold Substances 0.000 claims description 4
- 229910052737 gold Inorganic materials 0.000 claims description 4
- 238000002955 isolation Methods 0.000 claims 2
- 238000009826 distribution Methods 0.000 abstract description 23
- 230000002708 enhancing effect Effects 0.000 abstract description 5
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- 238000013461 design Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 230000003796 beauty Effects 0.000 description 1
- 239000002178 crystalline material Substances 0.000 description 1
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Abstract
The invention discloses a kind of antenna structures with metal rear shell, including a metal rear shell, a NFC antenna coil and a WPC aerial coil, the metal rear shell includes first through hole and the second through-hole, the NFC antenna coil and WPC aerial coil are located on the inside of metal rear shell, and the NFC antenna coil is arranged around the first through hole, the WPC aerial coil is arranged around second through-hole, and metal rear shell is additionally provided with the first gap, and first gap connects the first through hole and the second through-hole.By the gap between the through-hole and through-hole in applied metal rear shell, the Eddy Distribution in metal rear shell is changed, so that also enhancing the performance of antenna while eliminating metal rear shell and acting on radome.
Description
Technical field
The present invention relates to antenna technical fields, more particularly to the antenna structure with metal rear shell.
Background technique
With the development of mobile device near field communication (NFC) function at this stage, near-field communication (NFC, Near Field
Communication, working frequency 13.56MHz) with wireless charging (for example, wireless charging alliance (WPC, Wireless
Power Consortium) Qi standard, working frequency 100-200KHz) to be increasingly becoming customers institute green for the application of function
The object looked at.In order to realize the above functions, antenna is essential, therefore grinding for NFC antenna and WPC Antenna Design
Study carefully and is increasingly paid attention to.The design scheme of both existing antennas is: NFC antenna being coiled into concentric circles with WPC antenna and is put
On battery or metal plate, in addition the available preferable antenna performance of ferrite.And in the recent period with the favor of consumer, band
There is the mobile device of metal rear shell to come into vogue.This brings biggish difficulty to NFC antenna and WPC Antenna Design.Such as Fig. 1 institute
Show, in the case where between through-hole without gap, when NFC antenna (or the WPC antenna) work being placed on two through-holes, antenna
Electric current and metal on Eddy Distribution figure, the vortex for generating in metal rear shell and being completely reversed with antenna current is shown in figure
I.If not only being generated because NFC antenna and WPC antenna are placed directly on the inside of metal shell, in metal rear shell complete with antenna current
Be all-trans to vortex I, and metal rear shell completely shields antenna, due to this vortex being completely reversed and metal rear shell
Shield effectiveness it is therefore provided that aerial signal can not be detected on the outside of metal rear shell.
But after carrying out some processing appropriate to metal rear shell, a gap is such as opened on the edge of metal rear shell,
In the original vortex being completely reversed generated in metal rear shell in the edge " cutting " of metal rear shell, while producing and day
Line current vortex in the same direction, and then eliminate shielding action of the metal rear shell to antenna.It at present should in this way separately
Have devised NFC antenna (CN 102405556B) and WPC antenna (CN 104659927A).Especially, it is set in above-mentioned WPC antenna
In meter, cracked gap is right side to be reached on the left of metal plate, namely metal plate is divided into two parts up and down, so larger
Destroy to degree the integrality of metal plate.In addition, (although NFC and WPC coil is same to the integrated antenna system of NFC and WPC
The heart, be placed on the top of battery and coil is isolated with battery by ferrite and non-crystalline material) by widely
Such as Nokia 920 and Samsung S6 are applied in no metal rear shell handheld device, but there are no can prop up simultaneously so far
NFC antenna and WPC antenna integrated design based on metal rear shell are held, therefore, in order to cater to the demand of the majority of consumers, entirely
Metal rear shell NFC antenna and the antenna integrated researching and designing of WPC are at necessity.
Summary of the invention
The technical problem to be solved by the present invention is to overcome after existing NFC and WPC integral antenna is placed on metal
When on the inside of shell, it cannot propose a kind of superior performance the problem of metal rear shell received outside is to aerial signal, be able to maintain metal
The integral antenna structure of rear shell integrality and the simple near-field communication of processing technology and wireless charging.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention are as follows:
Antenna structure with metal rear shell, including a metal rear shell, a NFC antenna coil and a WPC aerial coil, it is described
Metal rear shell includes first through hole and the second through-hole, and the NFC antenna coil and WPC aerial coil are located on the inside of metal rear shell,
And the NFC antenna coil is arranged around the first through hole, the WPC aerial coil is arranged around second through-hole, gold
Belong to rear shell and be additionally provided with the first gap, first gap connects the first through hole and the second through-hole.
The beneficial effect of above scheme is: by the gap between the through-hole and through-hole in applied metal rear shell, changing
Eddy Distribution in metal rear shell, so that the vortex direction in metal rear shell is identical as aerial coil current direction, and then makes
It obtains and also enhances the performance of antenna while eliminating metal rear shell and acting on radome.Compared with traditional WPC antenna,
The design method also solves heat dissipation problem during WPC Antenna Operation to a certain extent, this invention ensures that metal rear shell
Integrality, metal rear shell is integrally formed, and processing technology is simple.
Antenna structure with metal rear shell, including a metal rear shell, a NFC antenna coil and a WPC aerial coil, it is described
Metal rear shell includes first through hole and the second through-hole, and the NFC antenna coil and WPC aerial coil are located on the inside of metal rear shell,
And the NFC antenna coil and WPC aerial coil surround the setting of one of the first through hole and the second through-hole, metal rear shell simultaneously
It is additionally provided with the first gap, first gap connects the first through hole and the second through-hole.
The beneficial effect of above scheme is: by the gap between the through-hole and through-hole in applied metal rear shell, changing
Eddy Distribution in metal rear shell, so that the vortex direction in metal rear shell is identical as aerial coil current direction, and then makes
It obtains and also enhances the performance of antenna while eliminating metal rear shell and acting on radome.In addition, by by two groups of coils
It is arranged simultaneously around the same through-hole, nests together two groups of antennas, to reduces the shared in a device of two groups of antennas
Position improves the space utilization rate of equipment.
Detailed description of the invention
Fig. 1 in the prior art without cracked gap when antenna current distribution and metal rear shell on Eddy Distribution figure；
Fig. 2 is antenna assumption diagram of the embodiment of the present invention one with metal rear shell；
The electric current and Eddy Distribution of antenna when Fig. 3 is WPC antenna (around the lower section through-hole) work of the embodiment of the present invention one
Schematic diagram；
Fig. 4 is Distribution of Magnetic Field figure of the WPC antenna on the outside of the metal rear shell at 5mm in antenna structure in Fig. 3；
The electric current and Eddy Distribution of antenna when Fig. 5 is NFC antenna (around the top through-hole) work of the embodiment of the present invention one
Schematic diagram；
Fig. 6 is Distribution of Magnetic Field figure of the NFC antenna on the outside of the metal rear shell at 25mm in antenna structure in Fig. 5；
Fig. 7 is antenna assumption diagram of the embodiment of the present invention two with metal rear shell；
Fig. 8 is antenna assumption diagram of the embodiment of the present invention three with metal rear shell.
Label declaration:
I/I1/I2/I3/I4, vortex；1, metal rear shell；2, first through hole；3, the second through-hole；4, NFC antenna coil；5,
WPC aerial coil；6, the first gap；7, third through-hole；8, the second gap.
Specific embodiment
To explain the technical content, the achieved purpose and the effect of the present invention in detail, below in conjunction with embodiment and cooperate attached
Figure is explained in detail.
The most critical design of the present invention is: using the metal rear shell of through-hole is had on mobile terminal, and these are led to
Hole is connected to by gap, and NFC antenna and WPC antenna are placed on the inside of metal rear shell and are set to outside through-hole and is placed.
Not only make the direction in the vortex circuit in metal rear shell identical as the direction of antenna current, also eliminating metal rear shell
The performance of antenna is also enhanced while to radome effect.
Referring to Fig. 2, a kind of antenna structure with metal rear shell, including a metal rear shell, a NFC antenna coil and one
WPC aerial coil, the metal rear shell include first through hole and the second through-hole, the NFC antenna coil and WPC aerial coil position
On the inside of metal rear shell, and the NFC antenna coil is arranged around the first through hole, and the WPC aerial coil is around described
The setting of second through-hole, metal rear shell are additionally provided with the first gap, and first gap connects the first through hole and the second through-hole.
As can be seen from the above description, the beneficial effects of the present invention are: the dexterously through-hole on applied metal shell utilizes seam
Gap connection through-hole achievees the effect that change vortex flow direction distribution, and vortex in the same direction with antenna itself on applied metal shell is to increase
Strong antenna performance eliminates shielding action of the metal rear shell to NFC antenna and WPC antenna, has structure beautiful, manufacture craft is simple
The features such as list, superior performance.
Further, the metal rear shell further includes third through-hole.
Further, the metal rear shell further includes the second gap, and second gap connects second through-hole and the
Three through-holes.
Further, the metal rear shell further comprises multiple through-holes, multiple through-holes and first through hole, the second through-hole it
Between connected by multiple gaps.
Seen from the above description, the present invention is applicable to the situation of multiple through-holes, can further be increased by multiple gaps
Strong antenna performance.
Further, fingerprint identification module, camera module, flash modules are installed in the first through hole.
Further, the first through hole is rectangle, round or ellipse, and the NFC antenna coil and WPC antenna line
It encloses corresponding identical as the shape of through-hole.
Embodiment one
Referring to figure 2., the embodiment of the present invention one are as follows:
A kind of antenna structure with metal rear shell, including metal rear shell 1, NFC antenna coil 4 and WPC aerial coil 5, institute
Stating metal rear shell 1 is all-metal rear shell, and the metal rear shell includes first through hole 2 and the second through-hole 3, first through hole as shown in the figure
2 are located at 3 lower section of the second through-hole, and actually the two can also exchange position or even the two is also possible to the positional relationship of left and right；Institute
State first through hole 2 and the second through-hole 3 can be respectively intended to installation fingerprint identification module, camera module, flash modules or its
His sensor module；The NFC antenna coil 4 and WPC aerial coil 5 are located at 1 inside of metal rear shell, i.e. installation battery, mobile phone
The sides such as chip, and the NFC antenna coil 4 is arranged around the first through hole 2, the WPC aerial coil 5 is around described the
The setting of two through-holes 3, metal rear shell 1 are additionally provided with the first gap 6, and first gap 6 connects the first through hole 2 and the second through-hole
3, first gap 6 respectively with NFC antenna coil 4 wherein on one side and WPC aerial coil 5 wherein while and intersect.
The performance of NFC antenna and the size of through-hole are related, and the performance of the bigger NFC antenna of through-hole is better, but through-hole is excessive
It will affect the beauty of metal rear shell, thereby increases and it is possible to impact to the layout of other component on the inside of metal rear shell, therefore in the present invention
The width in the first gap is selected as 0.5-1.5mm, preferably 1mm, and first through hole is sized to 5mmx5mm-20mmx20mm,
It is preferred that 10mmx10mm.Similarly, the setting of WPC antenna and the second clear size of opening size is referring to NFC antenna and first through hole
Setting.
The present invention is dexterously attached through-holes several in all-metal rear shell by gap, without in metal rear shell
Under conditions of gap of cracking on edge, it can also achieve the purpose that change vortex direction and eliminate metal rear shell to radome.Fig. 1
The Eddy Distribution schematic diagram showing in the antenna current without cracked gap in the prior art and metal rear shell, can from the figure
To find out, when any connection gap is not added between through-hole, the vortex I generated in metal rear shell all with antenna electric current itself
It is contrary.Since without the gap opened, so while shielding action of the metal rear shell to antenna, antenna is believed on a metal plate
It number can not be detected in the outside of metal rear shell.It is, antenna will be unable to work normally in this case.
Fig. 3 is after having added connection gap when the WPC antenna (detour lower section through-hole) of the present embodiment one works between through-hole
WPC antenna current, which is distributed in (clockwise direction) and metal rear shell, is vortexed loop distribution figure, wherein vortex be divided into two I1 with
I2, and it is vortexed the direction of I2 and the electric current of antenna itself is in the same direction；Further more, the gap opened also eliminates metal rear shell to WPC
The shielding action of antenna；That is the effect in the gap be when not cracking gap by preventing or being breaking at aerial coil current direction
The circulating direction of opposite vortex, so change vortex direction make the vortex become there is positive effect to have aerial coil
Effect vortex.Vortex I2 identical with antenna current direction itself plays the role of the magnetic flux enhancing to antenna, and then enhances
The performance of antenna, metal rear shell plays the role of enhancing antenna performance or amplifying in the case, so can also be gold
Belong to the amplifier that rear shell is considered as antenna.The present embodiment is mainly characterized by changing in metal rear shell by connecting through-hole with gap
The direction of major part vortex and the shielding action for eliminating metal rear shell simultaneously, this change are vortexed direction and eliminate metal rear shell
The mode of shielding action be equivalent to by way of cut-offfing seam on the edge of metal rear shell.
In addition, from figure 3, it can be seen that the Eddy Distribution in metal rear shell to be divided into vortex direction different (i.e. suitable
Hour hands are counterclockwise) two parts up and down, the WPC antenna current direction phase in the vortex direction I2 and work of part under metal rear shell
Together；So metal rear shell plays the role of enhancing WPC antenna performance for WPC antenna.In addition, metal rear shell top
Although the direction of vortex I1 divided is with the current direction of WPC antenna on the contrary, still there is no to WPC antenna performance for this partial vortices
Itself generates negative impact, because the mode that the mode that the reversed vortex generates is generated with WPC antenna itself spatially has
A certain distance, i.e. distance between two through-holes, and this distance are enough to eliminate above-mentioned two two for runing counter to vortex and generating
Interfering with each other between mode.
As shown in figure 3, in the present embodiment, the NFC antenna coil and WPC aerial coil are rectangular coil shape, and logical
The shape in hole correspond to it is identical, in addition, NFC antenna coil and WPC aerial coil are set when the shape of through-hole is round or oval
It is set to identical shape corresponding with through-hole.
Fig. 4 is shown to be obtained magnetic field in the WPC antenna on the outside of metal rear shell at Z=5mm and is in frequency by simulation
The Distribution of Magnetic Field figure of 150KHz.There are two peak namely two above-mentioned moulds for the Distribution of Magnetic Field of WPC antenna as can be seen from the figure
Formula.Wherein a peak right above antenna (namely that peak with negative value) be by antenna current and metal rear shell with day
Line current vortex collective effect in the same direction generates, and another peak (namely that peak with positive value) is then by reversed with antenna
Vortex generate.Due to the two peaks or mode spatially be separated into just the not interfereing with each other property at two peaks or mode,
It is therefore provided that two different locations (namely position of two through-hole) of the WPC antenna on the outside of metal rear shell can be detected
It arrives.This also enhances the flexibility of WPC antenna when in use, namely different from common WPC antenna, of the invention WPC days
Line can charge to the equipment with WPC antenna on two different positions.
Referring to figure 5., Fig. 5 is the vortex schematic diagram of the NFC antenna generation of the present embodiment one, has added connection gap between through-hole
Cabling distribution map is vortexed in NFC antenna current distribution (clockwise direction) and metal rear shell later.With above-mentioned WPC antenna
The case where it is similar, from figure 5 it can be seen that be also divided into vortex direction different (i.e. suitable for the Eddy Distribution in metal rear shell
Hour hands are counterclockwise) two parts up and down, the NFC antenna current direction phase in the vortex direction I3 and work of part in metal rear shell
Together；So metal rear shell plays the role of enhancing NFC antenna performance for NFC antenna.In addition, metal rear shell lower part
Although the direction of vortex I4 divided is with the current direction of NFC antenna on the contrary, still there is no to NFC antenna performance for this partial vortices
Itself generates negative impact, because the mode that the mode of the reversed vortex production is produced with NFC antenna itself spatially has
A certain distance, i.e. distance between two through-holes, and this distance be enough to eliminate it is above-mentioned two run counter to vortex generation mode it
Between interfere with each other.
It is illustrated in figure 6 and magnetic field is obtained in the NFC antenna on the outside of metal rear shell at Z=25mm in frequency by simulation
For the Distribution of Magnetic Field figure of 13.56MHz.Also there are two peak namely two moulds for the Distribution of Magnetic Field of NFC antenna as can be seen from the figure
Formula.Wherein a peak right above antenna (namely that peak with negative value) be by antenna current and metal rear shell with day
Line current vortex collective effect in the same direction generates, and another peak (namely that peak with positive value) is then by reversed with antenna
Vortex generate.Due to the two peaks or mode spatially be separated into just the not interfereing with each other property at two peaks or mode,
It is therefore provided that two different locations of the NFC antenna on the outside of metal rear shell can be detected.This also enhances this NFC days
The flexibility of line when in use, namely it is different from common NFC antenna, NFC antenna of the invention can be two different sides
Information exchange is carried out with extraneous NFC device upwards.
Embodiment two
Please refer to Fig. 7, the embodiment of the present invention second is that further increase through-hole on the basis of example 1, such as 3,
4,5 through-holes can be connected between multiple through-holes by multiple gaps；NFC antenna coil and WPC aerial coil can be set in
Around any two through-hole, but biggish through-hole is generally selected, available more preferably performance.Fig. 7 show three and leads to
The case where hole, three through-holes can be the combination of fingerprint recognition through-hole, camera through-hole and flash lamp through-hole, 2 He of first through hole
The second gap 8 can be opened up between third through-hole 7.It could be pointed out here that the first gap 6 of up and down direction must open, it is left
Second gap 8 of right direction can not then open.But compared with there is no the case where the second gap 8, NFC days when having the second gap 8
The performance of line and WPC antenna will be enhanced.
Embodiment three
Fig. 8 is please referred to, the difference of the embodiment of the present invention three and embodiment one is by the coil of NFC antenna and WPC antenna
It is centered around on the same through-hole, two coils is shown in Fig. 8 and are centered around on the second through-hole, wherein inner ring is placed NFC days
WPC aerial coil is placed in line coil, outer ring；WPC aerial coil can be placed with inner ring, NFC antenna coil is placed in outer ring.At this
In the case of, and the difference in embodiment one, other than NFC antenna coil and WPC aerial coil are arranged on the same through-hole,
It is other identical as embodiment, it can equally reach the Eddy Distribution for changing and generating in metal rear shell, enhance the work of antenna performance
With it is therefore provided that in the case, the signal of antenna can be also detected in the outside of metal rear shell.
In conclusion the antenna structure provided by the invention with the metal rear shell dexterously through-hole on applied metal shell,
To be attached between through-hole with gap achieve the effect that change vortex flow direction distribution, and apply on metal shell with antenna sheet
Body vortex in the same direction eliminates shielding action of the metal rear shell to NFC antenna and WPC antenna to enhance antenna performance；The present invention
It is simple with structure, the features such as good appearance, superior performance；Compared with traditional WPC antenna, the design method is to a certain degree
On also solve heat dissipation problem during WPC Antenna Operation, this invention ensures that the integrality of metal rear shell, metal rear shell one
Molding, processing technology are simple.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalents made by bright specification and accompanying drawing content are applied directly or indirectly in relevant technical field, similarly include
In scope of patent protection of the invention.
Claims (4)
1. the antenna structure with metal rear shell, including a metal rear shell, a NFC antenna coil and a WPC aerial coil, the gold
Belonging to rear shell includes first through hole and the second through-hole, and the NFC antenna coil and WPC aerial coil are located on the inside of metal rear shell, and
The NFC antenna coil is arranged around the first through hole, and the WPC aerial coil is arranged around second through-hole, special
Sign is: metal rear shell is additionally provided with the first gap, and first gap connects the first through hole and the second through-hole, and described first
The edge isolation of through-hole and the second through-hole with the metal shell；
The metal rear shell further comprises multiple through-holes, passes through multiple seams between multiple through-holes and first through hole, the second through-hole
Gap series connection.
2. the antenna structure with metal rear shell, including a metal rear shell, a NFC antenna coil and a WPC aerial coil, the gold
Belonging to rear shell includes first through hole and the second through-hole, and the NFC antenna coil and WPC aerial coil are located on the inside of metal rear shell, and
The NFC antenna coil and WPC aerial coil surround the setting of one of the first through hole and the second through-hole simultaneously, and feature exists
In: metal rear shell is additionally provided with the first gap, and first gap connects the first through hole and the second through-hole, the first through hole
Edge isolation with the second through-hole with the metal shell；
The metal rear shell further comprises multiple through-holes, passes through multiple seams between multiple through-holes and first through hole, the second through-hole
Gap series connection.
3. the antenna structure according to claim 1 or 2 with metal rear shell, which is characterized in that pacify in the first through hole
Equipped with fingerprint identification module, camera module, flash modules.
4. the antenna structure according to claim 1 with metal rear shell, which is characterized in that the first through hole be rectangle,
Round or ellipse, and the NFC antenna coil and WPC aerial coil are corresponding identical as the shape of through-hole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510551662.2A CN105119035B (en) | 2015-09-01 | 2015-09-01 | Antenna structure with metal rear shell |
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| CN201510551662.2A CN105119035B (en) | 2015-09-01 | 2015-09-01 | Antenna structure with metal rear shell |
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| CN105119035A CN105119035A (en) | 2015-12-02 |
| CN105119035B true CN105119035B (en) | 2019-03-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20170170689A1 (en) * | 2015-12-14 | 2017-06-15 | Qualcomm Incorporated | Wireless charging of metal framed electronic devices |
| CN107370243B (en) * | 2017-06-20 | 2019-06-07 | 华为技术有限公司 | A kind of terminal wireless charging receiver, emitter and wireless charging system |
| CN110667033B (en) * | 2019-09-19 | 2021-07-27 | 广东长盈精密技术有限公司 | Fingerprint hole processing method |
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| KR101874641B1 (en) * | 2011-08-08 | 2018-07-05 | 삼성전자주식회사 | Portable terminal with wireless charging coil and antenna element in same plane |
| JP5924006B2 (en) * | 2012-02-02 | 2016-05-25 | 株式会社村田製作所 | Antenna device |
| CN204857966U (en) * | 2013-02-13 | 2015-12-09 | 株式会社村田制作所 | Antenna device and electronic equipment |
| CN206564323U (en) * | 2013-04-08 | 2017-10-17 | 株式会社村田制作所 | Communication terminal |
| CN204966671U (en) * | 2015-09-01 | 2016-01-13 | 深圳市信维通信股份有限公司 | Take antenna structure of metal backshell |
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