CN205211921U - Near field coupling antenna structure with metal backshell - Google Patents
Near field coupling antenna structure with metal backshell Download PDFInfo
- Publication number
- CN205211921U CN205211921U CN201520805532.2U CN201520805532U CN205211921U CN 205211921 U CN205211921 U CN 205211921U CN 201520805532 U CN201520805532 U CN 201520805532U CN 205211921 U CN205211921 U CN 205211921U
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- Prior art keywords
- back cover
- metal back
- gap
- open loop
- field coupling
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- 239000002184 metal Substances 0.000 title claims abstract description 110
- 230000008878 coupling Effects 0.000 title claims abstract description 30
- 238000010168 coupling process Methods 0.000 title claims abstract description 30
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 abstract description 7
- 238000012545 processing Methods 0.000 abstract description 5
- 238000005336 cracking Methods 0.000 abstract description 3
- 238000007142 ring opening reaction Methods 0.000 abstract 4
- 102000010970 Connexin Human genes 0.000 abstract 1
- 108050001175 Connexin Proteins 0.000 abstract 1
- 210000003976 gap junction Anatomy 0.000 abstract 1
- 238000004891 communication Methods 0.000 description 10
- 238000013461 design Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 230000006578 abscission Effects 0.000 description 5
- 238000004088 simulation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000001465 metallisation Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
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- Support Of Aerials (AREA)
- Details Of Aerials (AREA)
Abstract
The utility model discloses a near field coupling antenna structure with metal backshell, including a metal backshell and a near field coupling antenna coil, the metal backshell corresponds antenna coil is provided with a trompil, the metal backshell still includes a ring -opening, the ring -opening centers on the trompil sets up, the metal backshell still includes first gap and second gap, the one end in first gap with the ring -opening links to each other, the other end toward metal backshell outside extension, the 2nd gap junction trompil and ring -opening, just second gap and first gap set up point -blank. Through the processing of cracking of some flutings to all standing metal backshell, the influence of all standing metal backshell to the near field coupled antenna has been reduced. Compare do not weaken near field coupling antenna performance with current method, partial the accounting for of metal that has enlarged simultaneously on the metal backshell is compared.
Description
Technical field
The utility model relates to the communications field, particularly relates to a kind of near-field coupling antenna structure with metal back cover.
Background technology
Increasing mobile terminal adopts the design of metallization fuselage, and metal shell area to account for complete machine ratio more and more higher.These designer trends bring challenge to the Antenna Design on mobile terminal.The antenna of current mobile terminal is mainly divided into far-field communication antenna and near-field communication aerial according to radiation theory.The former comprises GSM, and LTE, WiFi, GPS etc. are at interior antenna, and the latter comprises the antenna of near-field communication NFC (NearFieldCommunication) and wireless charging WPT (WirelessPowerTransfer).If metallized fuselage distance antenna is very near, and have partial occlusion even all standing antenna time, all can cause negative effect to above-mentioned two kinds of antenna performances.
For near-field communication aerial, the antenna size formed due to the frequency range of its work and actual operating characteristic, in mobile terminal integral layout, be generally arranged in the back cover plane that complete machine is parallel with mainboard, and the back cover of this part of complete machine is generally designed to all-metal.Be illustrated in figure 1 a kind of spiral near-field communication aerial structure, Figure 2 shows that the generalized section that helical antenna 2 is covered by metal back cover 1, because near-field communication aerial is almost covered completely by metal, to such an extent as to radiance reduces greatly.
In order to solve problems, existing certain methods is:
One is as shown in Figure 3, and certain some parts of aerial coil 1 is moved on to non-metallic regions, and the aerial coil area exposing non-metallic regions is larger, then near-field communication aerial radiance is better.But need the Outside Dimensions changing designed equipment like this, limitation is larger.
Two is as shown in Figures 4 and 5, the metal back cover 2 outside antenna is opened hole or the gap of certain area, to change the CURRENT DISTRIBUTION in metal chassis, thus reduces metal back cover to the impact of near-field communication aerial.Gap and hole are opened larger (namely metallic member is fewer), and near-field communication aerial radiance is better.On metal back cover, open as far as possible large hole shown in Fig. 4, bulk metal is not interrupted, and it needs to open larger circular hole just can reach the performance be comparatively satisfied with, and the program does not affect Whole Equipment profile, but have higher requirement to perforated area, the ratio of bulk metal is lower.It is the combination in perforate+gap on metal back cover shown in Fig. 5, be characterized in open less hole on metal back cover, at present minimum scheme is reduced to covering metal area, the program does not affect Whole Equipment profile, less hole can be opened, but the area of perforate equally can not be too small, according to example calculation, to reach and not adding the suitable performance of metal back cover, perforated area is needed to account for more than 20% of bulk metal back cover area, namely the ratio that metallizes is no more than 80%, and this still can not meet the demands under some requires higher applied environment to metallization.
Utility model content
Technical problem to be solved in the utility model is: provide a kind of high performance antenna structure that can reduce all standing metal back cover and affect near-field coupling antenna.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of near-field coupling antenna structure with metal back cover, comprise a metal back cover and a near-field coupling aerial coil, the corresponding described aerial coil center of described metal back cover is provided with a perforate, described metal back cover also comprises an open loop, described open loop is arranged around described perforate, described metal back cover also comprises the first gap and the second gap, the one end in described first gap is connected with described open loop, the other end extends outside metal back cover, described second gap connects described perforate and open loop, and described second gap and the first gap are arranged point-blank.
Further, described open loop comprises at least one brace, and described brace connects the metal back cover of open loop inner side and outer side.
Further, described perforate and described open loop are circle, rectangle or other rules or irregularly shaped.
Further, the width of open loop is more than 0.2mm.
Further, described perforate is circular, and its radius is 1mm-3mm.。
Further, described perforate is square, and its area is 3mm
2-25mm
2.
Further, described open loop is imperfect ring, and the part around perforate is arranged.
Further, the width in described first gap is 0.2mm-3mm, and the width in described second gap is 0.2mm-2mm.
Further, described open loop does not overlap with described aerial coil.
The beneficial effects of the utility model are: by some process of cracking to all standing metal back cover, reduce all standing metal back cover to the impact of near-field coupling antenna.Compare with existing method and do not weaken near-field coupling antenna performance, expand the metallic member accounting on metal back cover simultaneously, designer can be made more to use metallic area, increase the flexibility of design.
Accompanying drawing explanation
Fig. 1 is prior art aerial coil schematic diagram;
Fig. 2 is prior art metal back cover cover antenna coil generalized section;
Fig. 3 is that an aerial coil part is shifted out the schematic diagram of metal back cover by prior art;
Fig. 4 is the schematic diagram in the perforate of metal back cover in prior art;
Fig. 5 is the schematic diagram in metal back cover perforate+gap in prior art;
Fig. 6 is the antenna structure view of the utility model embodiment one;
Fig. 7 is the antenna structure view of the utility model embodiment two;
Fig. 8 is the antenna structure view of the utility model embodiment three;
Fig. 9 is the simulation result of the magnetic field intensity of the antenna structure that aerial coil is not covered by metal back cover;
Figure 10 is the simulation result of the magnetic field intensity of the antenna structure of prior art shown in Fig. 5;
Figure 11 is the simulation result of the magnetic field intensity of the antenna structure of the utility model embodiment one;
Figure 12 is the simulation result of the magnetic field intensity of the antenna structure of the utility model embodiment three.
Label declaration:
1, metal back cover; 2, aerial coil; 3, perforate; 4, open loop; 5, the first gap; 6, the second gap; 7, metal abscission ring; 8, brace.
Embodiment
By describing technology contents of the present utility model in detail, realized object and effect, accompanying drawing is coordinated to be explained below in conjunction with execution mode.
The design of the utility model most critical is: on metal back cover, a perforate+open loop is opened in the position of respective antenna coil, improves the metallic area of metal back cover while ensureing antenna radiation performance.
With reference to Fig. 6, a kind of near-field coupling antenna structure with metal back cover, comprise a metal back cover and a near-field coupling aerial coil, the corresponding described aerial coil center of described metal back cover is provided with a perforate, described metal back cover also comprises an open loop, described open loop is arranged around described perforate, described metal back cover also comprises the first gap and the second gap, the one end in described first gap is connected with described open loop, the other end extends outside metal back cover, described second gap connects described perforate and open loop, and described second gap and the first gap are arranged point-blank.
Seen from the above description, the beneficial effects of the utility model are: by process of cracking to some perforates of all standing metal back cover, reduce all standing metal back cover to the impact of near-field coupling antenna.Compare with existing method and do not weaken near-field coupling antenna performance, expand the metallic member accounting on metal back cover simultaneously, designer can be made more to use metallic area, increase the flexibility of design.
Further, described open loop comprises at least one brace, and described brace connects the metal back cover of open loop inner side and outer side.
Seen from the above description, connected the metal back cover of open loop inner side and outer side by brace, make metal back cover be one on the whole, processing technology is simpler.
Further, described perforate and described open loop are circle, rectangle or other rules or irregularly shaped.
Seen from the above description, the utility model is applicable to difform aerial coil, and can meet the different demands to outward appearance.
Further, the width of open loop is more than 0.2mm.
Further, described perforate is circular, and its radius is 1mm-3mm.。
Further, described perforate is square, and its area is 3mm
2-25mm
2.
Further, described open loop is imperfect ring, and the part around perforate is arranged.
Further, the width in described first gap is 0.2mm-3mm, and the width in described second gap is 0.2mm-2mm.
Further, described open loop does not overlap with described aerial coil.
Embodiment one
Please refer to Fig. 6, the utility model embodiment one is a kind of near-field coupling antenna structure with metal back cover, is applicable to the electronic equipment that mobile phone, palmtop PC, POS etc. have near-field coupling function.Described antenna structure comprises metal back cover 1 and a near-field coupling aerial coil 2, and described aerial coil 2 is positioned at inside metal back cover 1.Described metal back cover can be the whole back cover of electronic equipment, also can be a sheet metal of cover antenna coil 2, and described sheet metal can be circular, rectangle or other rule or irregular shape, is preferably good can cover whole aerial coil.The position at corresponding described aerial coil 2 center of described metal back cover 1 is provided with a perforate 3, described metal back cover 1 also comprises an open loop 4, described open loop 4 is arranged around described perforate 3, and described perforate and open loop all do not overlap with aerial coil, namely the region that aerial coil center does not have coil is positioned at, described metal back cover 1 also comprises the first gap 5 and the second gap 6, the one end in described first gap 5 is connected with described open loop 4, the other end extends outside metal back cover 1, whole metal back cover edge can be extended to, also edge can not be extended to, described second gap 6 connects described perforate 3 and open loop 4, and described second gap 6 and the first gap 5 extended on logical straight line.
Perforate 3 shown in Fig. 6 and open loop 4 are circle, and in fact it also can be rectangle or other rule or irregular shape, and perforate and open loop can be same shape, also can be different.The size in described perforate 3, open loop 4, first gap and the second gap can adjust according to actual conditions, and its size is larger usually, and antenna performance is better, but metallization is also lower.Preferably, when described perforate 3 is circular, its radius is 1mm-3mm, and during for rectangle, its area is greater than for 3mm
2-25mm
2; The width of described open loop is for being not less than 0.2mm; The width in described first gap is 0.2mm-3mm, and the width in described second gap is 0.2mm-2mm.。Optimum, be less than 20% of whole metal back cover for good with the gross area in perforate, open loop and gap.
Compared with prior art, the utility model introduces a little perforate in large opening, form the perforate shown in Fig. 6 and open loop structure, no matter large opening or little perforate, size is all less, aerial coil is not exposed, except the first gap place on the whole still cover by metal back cover, bulk metal area is improved.The relaying of the magnetic field produced at tapping by metal abscission ring continues to external radiation by the introducing of the metal abscission ring 7 between perforate 3 and open loop 4, first gap and the second gap extended point-blank, can enhanced rad further, therefore, compared with prior art, the antenna structure of the present embodiment does not cause attenuation, also increases the area of bulk metal simultaneously.
Embodiment two
As shown in Figure 7, embodiment two of the present utility model adds brace 8 on the basis of embodiment one.Described brace 8 is arranged on the optional position of described open loop 4, connects the metal rear shell portion of open loop 4 inner side and outer side, that is, metal abscission ring 7 is connected with the metal rear shell portion of periphery, only have a brace 8 shown in figure, but it also can arrange multiple, such as 3 or 4.The present embodiment can ensure integraty and the integrality of metal back cover, is beneficial to structure processing.
Embodiment three
As shown in Figure 8, embodiment three of the present utility model has done further improvement on the basis of embodiment one, and wherein open loop 4 is imperfect ring, and the part only around perforate 3 is arranged, such as, only arrange around the half of perforate 3, that is, open loop 4 is semi-circular shape.The present embodiment further increases the integrated degree of metal back cover, and processing technology is simpler.
Be respectively aerial coil as shown in figs9-12 not by the simulation result of the antenna structure of the prior art (situation 2) shown in metal back cover covering (situation 1), Fig. 5, the utility model embodiment one (situation 3), embodiment three (situation 4) in the magnetic field intensity at distance experiment aerial coil 5mm place, wherein aerial coil is the flat helical antenna of radius 16mm, metal back cover is the metal disk of radius 18mm, aerial coil and metal back cover gap 0.2mm.Can find out, in four kinds of situations, the peak value of magnetic field intensity is close.
As shown in table 1 is the test result of above-mentioned four kinds of situation practical applications in wireless charging antenna, application supports that the wireless charging of Qi standard is launched, receiving circuit, wireless charging efficiency respective under testing above-mentioned 4 kinds of situations, and metallic area accounting in the metal back cover of cover antenna is compared.As can be seen from the above results, the scheme (situation 2) that have employed the scheme (situation 3 and situation 4) that the utility model proposes maximum with metallic area accounting in general conventional solution is compared, charge efficiency does not obviously decline, but the metal accounting of covering metal sheet rises to more than 92% from 79%, at complete machine, metallic area is required there is obvious advantage in higher applied environment.
| State | Charge efficiency | Metallic area accounting in metal disk |
| Situation 1 | 52％ | 0％ |
| Situation 2 | 41％ | 79％ |
| Situation 3 | 40％ | 92％ |
| Situation 4 | 37％ | 95％ |
Table 1
In sum, the utility model, by arranging perforate, open loop and gap in metal back cover, triplicity, reduces all standing metal back cover to the impact of near-field coupling antenna.Compare with existing method and do not weaken near-field coupling antenna performance, expand the metallic member accounting on metal back cover simultaneously, designer can be made more to use metallic area, increase the flexibility of design.By brace, the metal abscission ring between perforate with open loop is connected with peripheral metal back cover, processing technology can be made simpler.
The foregoing is only embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every equivalents utilizing the utility model specification and accompanying drawing content to do; or be directly or indirectly used in relevant technical field, be all in like manner included in scope of patent protection of the present utility model.
Claims (9)
1. the near-field coupling antenna structure with metal back cover, comprise a metal back cover and a near-field coupling aerial coil, the corresponding described aerial coil center of described metal back cover is provided with a perforate, it is characterized in that: described metal back cover also comprises an open loop, described open loop is arranged around described perforate, described metal back cover also comprises the first gap and the second gap, the one end in described first gap is connected with described open loop, the other end extends outside metal back cover, described second gap connects described perforate and open loop, and described second gap and the first gap are arranged point-blank.
2. the near-field coupling antenna structure with metal back cover according to claim 1, is characterized in that: described open loop comprises at least one brace, and described brace connects the metal back cover of open loop inner side and outer side.
3. the near-field coupling antenna structure with metal back cover according to claim 1, is characterized in that: described perforate and open loop are rectangle or circle.
4. the near-field coupling antenna structure with metal back cover according to any one of claim 1-3, is characterized in that: the width of open loop is more than 0.2mm.
5. the near-field coupling antenna structure with metal back cover according to any one of claim 1-3, is characterized in that: described perforate is for circular, and its radius is 1mm-3mm.
6. the near-field coupling antenna structure with metal back cover according to any one of claim 1-3, is characterized in that: described perforate is square, and its area is 3mm
2-25mm
2.
7. the near-field coupling antenna structure with metal back cover according to any one of claim 1-3, is characterized in that: described open loop is imperfect ring, and the part around perforate is arranged.
8. the near-field coupling antenna structure with metal back cover according to any one of claim 1-3, is characterized in that: the width in described first gap is 0.2mm-3mm, and the width in described second gap is 0.2mm-2mm.
9. the near-field coupling antenna structure with metal back cover according to any one of claim 1-3, is characterized in that: described open loop does not overlap with described aerial coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520805532.2U CN205211921U (en) | 2015-10-15 | 2015-10-15 | Near field coupling antenna structure with metal backshell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520805532.2U CN205211921U (en) | 2015-10-15 | 2015-10-15 | Near field coupling antenna structure with metal backshell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205211921U true CN205211921U (en) | 2016-05-04 |
Family
ID=55849620
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520805532.2U Expired - Fee Related CN205211921U (en) | 2015-10-15 | 2015-10-15 | Near field coupling antenna structure with metal backshell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205211921U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107546467A (en) * | 2016-06-29 | 2018-01-05 | 禾邦电子(苏州)有限公司 | NFC antenna under complete closure metal slit environment |
| CN109037945A (en) * | 2017-06-08 | 2018-12-18 | 速码波科技股份有限公司 | Metal shell construction |
-
2015
- 2015-10-15 CN CN201520805532.2U patent/CN205211921U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107546467A (en) * | 2016-06-29 | 2018-01-05 | 禾邦电子(苏州)有限公司 | NFC antenna under complete closure metal slit environment |
| CN107546467B (en) * | 2016-06-29 | 2024-04-12 | 禾邦电子(苏州)有限公司 | NFC antenna in fully closed metal gap environment |
| CN109037945A (en) * | 2017-06-08 | 2018-12-18 | 速码波科技股份有限公司 | Metal shell construction |
| CN109037945B (en) * | 2017-06-08 | 2021-04-16 | 速码波科技股份有限公司 | Metal shell structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160504 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |