CN107546463B - NFC antenna in semi-closed metal gap environment - Google Patents
NFC antenna in semi-closed metal gap environment Download PDFInfo
- Publication number
- CN107546463B CN107546463B CN201610494748.0A CN201610494748A CN107546463B CN 107546463 B CN107546463 B CN 107546463B CN 201610494748 A CN201610494748 A CN 201610494748A CN 107546463 B CN107546463 B CN 107546463B
- Authority
- CN
- China
- Prior art keywords
- gap
- nfc antenna
- back cover
- metal back
- metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000002184 metal Substances 0.000 title claims abstract description 93
- 230000005672 electromagnetic field Effects 0.000 claims abstract description 5
- 230000003313 weakening effect Effects 0.000 claims abstract description 5
- 239000000758 substrate Substances 0.000 claims description 7
- 230000001788 irregular Effects 0.000 claims description 6
- 229910052755 nonmetal Inorganic materials 0.000 claims description 4
- 230000006698 induction Effects 0.000 claims description 2
- 238000004891 communication Methods 0.000 abstract description 5
- 230000005855 radiation Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
The invention discloses an NFC antenna in a semi-closed metal slot environment, and belongs to the technical field of wireless communication. The NFC antenna comprises a metal back cover, an NFC antenna and a through hole arranged on the metal back cover; the metal back cover is provided with a first gap and a second gap, the through hole is positioned at the lower side of the first gap, the second gap is vertically and penetratingly connected with the first gap and the through hole, and the first gap and the second gap form a T-shaped gap; the NFC antenna is arranged on the inner side wall of the metal back cover and surrounds the through hole; one side of the first gap is provided with a section of closing section which is communicated with the metal back cover. Through first gap and the second gap of seting up on the metal back of body lid for NFC antenna's electromagnetic field passes through the gap radiation and goes out, and the one end closed segment that sets up through one side of first gap simultaneously can avoid the gap to produce reverse induced current, has avoided the metal back of body lid to the weakening of NFC antenna performance, thereby has further improved NFC antenna's performance in the metal environment.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to an NFC antenna in a semi-closed metal slot environment.
Background
NFC (Near Field Communication ) is a short-distance wireless communication technology, traditional NFC antenna mainly covers behind the electronic product, but along with the popularity of consumer electronic products such as cell-phones, notebooks, tablet computers of all-metal fuselage, when NFC antenna covers behind the metal material, the electromagnetic field that the antenna produced can be partly blocked behind the metal, has weakened NFC's performance greatly, user experience is not good, so need provide the antenna structure of an adaptation in order to reduce the influence of metal body to NFC antenna, make NFC antenna's performance better.
Disclosure of Invention
In order to reduce the influence of a metal body on an NFC antenna, improve the performance of the NFC antenna in a metal environment and improve the user experience effect, the embodiment of the invention provides the NFC antenna in a semi-closed metal gap environment. The technical scheme of the invention is as follows:
in a first aspect, an NFC antenna in a semi-closed metal slot environment is provided, comprising:
the NFC antenna comprises a metal back cover, an NFC antenna and a through hole arranged on the metal back cover;
the metal back cover is provided with a first gap and a second gap, the through hole is positioned at the lower side of the first gap, the second gap is vertically and penetratingly connected with the first gap and the through hole, and the first gap and the second gap form a T-shaped gap;
the NFC antenna is arranged on the inner side wall of the metal back cover and surrounds the through hole;
one side of the first gap is provided with at least one section of closed section, and the closed section is communicated with the metal back cover.
Further, the NFC antenna in the semi-closed metal slot environment further includes:
and the nonmetal substrate is attached between the antenna and the metal back cover.
Further, the through hole is shared with a camera hole, a flash lamp hole or a touch recognition sensor hole arranged on the metal back cover.
Further, the width of the second gap is 1.0-2.0mm, and the length is 3.0-7.0mm.
Further, the first gap spans the left side and the right side of the metal back cover, and the distance between the closing section and the edge of the metal back cover at the near side is 0-5.0mm.
Further, the NFC antenna comprises an antenna coil with a preset shape and two feed points, and the NFC antenna is connected with the chip through the feed points.
Further, the shape of the antenna coil includes rectangular, circular, triangular, and irregular.
Further, the shape of the through hole includes rectangular, circular, triangular and irregular shapes.
The embodiment of the invention provides an NFC antenna in a semi-closed metal gap environment, which comprises a metal back cover, an NFC antenna and a through hole arranged on the metal back cover; the metal back cover is provided with a first gap and a second gap, the through hole is positioned at the lower side of the first gap, the second gap is vertically and penetratingly connected with the first gap and the through hole, and the first gap and the second gap form a T-shaped gap; the NFC antenna is arranged on the inner side wall of the metal back cover and surrounds the through hole; one side of the first gap is provided with a section of closing section which is communicated with the metal back cover. Through first gap and the second gap of seting up on the metal back of body lid for the electromagnetic field of antenna passes through the gap radiation and goes out, the one end closed section that sets up through one side of first gap simultaneously can avoid the gap to produce reverse induced current, has avoided the metal back of body lid to the weakening of NFC antenna performance, thereby has further improved the performance of NFC in the metal environment.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an NFC antenna in a semi-closed metal slot environment according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a metal back cover structure along a left-right direction according to an embodiment of the present invention;
FIG. 3-1 is a schematic illustration of the dimensions of a first slot and a second slot provided by an embodiment of the present invention;
fig. 3-2 is a schematic diagram of an NFC antenna in a semi-closed metal slot environment with a closed segment on the left side of a first slot provided by an embodiment of the present invention;
FIGS. 3-3 are schematic illustrations of two closed segments on a first slit provided in accordance with embodiments of the present invention;
fig. 4 is a schematic diagram of current trend of an NFC antenna and a metal back cover according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an NFC antenna according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The present invention provides an NFC antenna in a semi-closed metal slot environment, and referring to fig. 1, the NFC antenna in the semi-closed metal slot environment includes:
the NFC antenna comprises a metal back cover 1, an NFC antenna 2 and a through hole 3 arranged on the metal back cover;
the metal back cover is provided with a first gap 11 and a second gap 12, the through hole 3 is positioned at the lower side of the first gap 11, the second gap 12 is vertically and penetratingly connected with the first gap 11 and the through hole 3, and the first gap 11 and the second gap 12 form a T-shaped gap;
the NFC antenna 2 is arranged on the inner side wall of the metal back cover and surrounds the through hole 3;
at least one closing section 111 is arranged on one side of the first slit 11, which closing section communicates with the metal back cover.
The metal back cover may be a back cover of an electronic device, including but not limited to a smart phone, a tablet computer, an electronic reader, a music player, and the like.
In addition, referring to fig. 2, the NFC antenna in the semi-closed metal slot environment further includes:
and a non-metal substrate 4, wherein the non-metal substrate 4 is attached between the antenna 2 and the metal back cover.
In practical use, the thickness of the nonmetallic substrate is less than 0.1mm, and fig. 2 is a cross-sectional view of the metallic back cover structure shown in fig. 1 along the left-right direction;
the nonmetallic substrate can be foam, plastic parts or the like.
By arranging the nonmetallic substrate between the NFC antenna and the metal back cover, the electrical parameters of the NFC antenna are better, and the performance of the antenna is further improved.
In the present invention, the through hole 3 is shared with a camera hole, a flash hole or a touch recognition sensor hole provided on the metal back cover; in addition, the through holes can be used for arranging logo patterns consistent with the shapes of the through holes, and the embodiment of the invention does not limit specific components arranged at the through holes.
The shape of the through hole includes rectangle, circle, triangle and irregular shape, and the embodiment of the invention does not limit the specific shape of the through hole.
In the present invention, referring to fig. 3-1, the width of the second slit 12 may be 1.0-2.0mm and the length may be 3.0-7.0mm in practical application; the first gap 11 spans the left side and the right side of the metal back cover 1, the distance between the closing section 111 and the edge of the metal back cover 1 at the near side can be 0-5.0mm, and the length of the closing section is set according to practical application; the distance between the upper edge of the first slit and the upper edge of the metal back cover can be about 7.0mm.
The width of the first gap is 1.5mm at minimum, and the metal back cover is divided into an upper half part and a lower half part through the first gap.
The above-mentioned size range is a preferred range in practical use, and the size range may be specifically set according to the size of the metal rear cover, and the present invention is not limited to the specific size range.
Wherein, one side of the first slot 11 is provided with a closed section 111, which includes a closed section on the left side or the right side of the first slot 11, fig. 1 shows that the closed section 111 is on the right side of the first slot 11, and referring to fig. 3-2, a schematic diagram of an NFC antenna in the semi-closed metal slot environment when the closed section is on the left side of the first slot 11 is shown.
Alternatively, the number of closure segments may be plural, as shown in fig. 3-3, with two closure segments to the right of the first gap.
For example, referring to fig. 4 a, when the closed section is disposed on the right side of the first slot, if the current direction in the antenna is counterclockwise, the current in the metal back cover may refer to the drawing if the current flows through the closed section to fill the upper half and the lower half of the metal back cover; referring to fig. 4 b, when the closed section is disposed at the left side of the first slot in the drawing, if the current direction in the antenna is clockwise, the current flows through the closed section to fill the upper and lower halves of the metal back cover, and the current in the metal back cover can be referred to as shown in the drawing.
By arranging at least one section of closed section on one side of the first gap, reverse induced current generated by the gap can be avoided, so that the metal back cover is prevented from weakening the performance of the NFC antenna, the performance of the NFC antenna in a metal environment is further improved, and user experience is improved; in addition, through setting up at least one section closed section in one side of first gap, can make the electric current pass through in the upper half and the lower half of metal back lid to further strengthen the performance of NFC antenna.
In the embodiment of the invention, the antenna 2 comprises an antenna coil of a predetermined shape and two feed points, through which the NFC antenna is connected to the chip.
The antenna coil has a rectangular, circular, triangular or irregular shape.
The NFC antenna 2 may also be other near field communication, such as RFID (Radio Frequency Identification ) technology.
Referring to fig. 5, the NFC antenna includes an antenna coil 31 and two feed points 32, where the antenna coil 31 may be wound layer by layer from outside to inside to form a planar coil, and the antenna coil includes at least one turn of coil; the NFC antenna is connected to the NFC chip through the feed point 32.
Illustratively, as shown in fig. 5, the outer coil of the NFC may be greater than 35mm long and greater than 25mm wide.
In operation, current is input to the NFC antenna coil 31 from one feed point and loop current is formed in the antenna from the coil to the other feed point of the antenna coil.
It should be noted that the NFC antenna shown in fig. 5 is only exemplary, and the NFC antenna may be other shapes and may also be other winding manners, and the present invention is not limited to a specific NFC antenna.
According to the NFC antenna in the semi-closed metal slot environment, the electromagnetic field of the antenna is radiated out through the slots through the first slots and the second slots formed in the metal back cover, and meanwhile, reverse induction current generated by the slots can be avoided through the closed section at one side of the first slots, so that the metal back cover is prevented from weakening the performance of the NFC antenna, and the performance of NFC in the metal environment is further improved.
Example two
The invention also provides electronic equipment, which comprises the NFC antenna in the semi-closed metal slot environment, wherein the antenna in the NFC antenna in the semi-closed metal slot environment is communicated with a matching circuit.
The electronic device includes, but is not limited to, a smart phone, a tablet computer, an electronic reader, a music player, etc., and the metal back cover may be a back cover of the electronic device.
The NFC antenna comprises an NFC antenna coil and two feed points, the NFC antenna is connected with the NFC chip through the feed points, and the NFC antenna can be communicated with the circuit board.
Any combination of the above optional solutions may be adopted to form an optional embodiment of the present invention, which is not described herein.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (8)
1. NFC antenna under semi-closed metal gap environment, its characterized in that includes:
the NFC antenna comprises a metal back cover, an NFC antenna and a through hole arranged on the metal back cover;
the metal back cover is provided with a first gap and a second gap, the through hole is positioned at the lower side of the first gap, the second gap is vertically and penetratingly connected with the first gap and the through hole, and the first gap and the second gap form a T-shaped gap;
the NFC antenna is arranged on the inner side wall of the metal back cover and surrounds the through hole, the first gap is provided with at least one section of closed section, the closed section is communicated with the metal back cover, the NFC antenna does not pass through the first gap, the electromagnetic field of the NFC antenna passes through the first gap and the second gap, and meanwhile, reverse induction current generated by the first gap and weakening of the NFC antenna performance by the metal back cover are avoided through the closed section;
the metal back cover includes a back cover of the electronic device.
2. The NFC antenna in a semi-closed metal slot environment according to claim 1, wherein the NFC antenna in a semi-closed metal slot environment further comprises:
and the nonmetal substrate is attached between the antenna and the metal back cover.
3. The NFC antenna in a semi-closed metal slot environment according to claim 2 wherein the through hole is common with a camera hole, a flash hole or a touch recognition sensor hole provided on the metal back cover.
4. An NFC antenna according to claim 1 wherein the second slot has a width of 1.0-2.0mm and a length of 3.0-7.0mm.
5. The NFC antenna in a semi-closed metal slot environment according to claim 4 wherein the first slot spans the left and right sides of the metal back cover and the distance between the closed section and the proximal metal back cover rim is 0-5.0mm.
6. The NFC antenna in a semi-closed metal gap environment according to claim 5 wherein the NFC antenna comprises an antenna coil of a predetermined shape and two feed points through which the NFC antenna is connected to a chip.
7. The NFC antenna in a semi-closed metal slot environment according to claim 6 wherein the shape of the antenna coil includes rectangular, circular, triangular and irregular.
8. NFC antenna in a semi-closed metal slot environment according to any of claims 1-7 wherein the shape of the through hole comprises rectangular, circular, triangular and irregular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610494748.0A CN107546463B (en) | 2016-06-29 | 2016-06-29 | NFC antenna in semi-closed metal gap environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610494748.0A CN107546463B (en) | 2016-06-29 | 2016-06-29 | NFC antenna in semi-closed metal gap environment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107546463A CN107546463A (en) | 2018-01-05 |
| CN107546463B true CN107546463B (en) | 2024-04-02 |
Family
ID=60962781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610494748.0A Active CN107546463B (en) | 2016-06-29 | 2016-06-29 | NFC antenna in semi-closed metal gap environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107546463B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108769298B (en) * | 2018-03-28 | 2021-03-23 | Oppo广东移动通信有限公司 | Electronic device |
| CN113708054B (en) * | 2020-05-20 | 2023-04-04 | 华为技术有限公司 | Electronic device |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008131115A (en) * | 2006-11-17 | 2008-06-05 | Tamura Seisakusho Co Ltd | Antenna coil and communication apparatus |
| JP2013168894A (en) * | 2012-02-17 | 2013-08-29 | Murata Mfg Co Ltd | Antenna device and communication terminal having the same |
| WO2014167812A1 (en) * | 2013-04-12 | 2014-10-16 | パナソニック株式会社 | Antenna, antenna device and communication device |
| CN204271251U (en) * | 2014-11-17 | 2015-04-15 | 惠州硕贝德无线科技股份有限公司 | A kind of NFC antenna of all-metal back of the body lid |
| WO2015101213A1 (en) * | 2013-12-31 | 2015-07-09 | Byd Company Limited | Nfc antenna assembly |
| 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 |
| CN105024169A (en) * | 2015-07-15 | 2015-11-04 | 深圳市信维通信股份有限公司 | Small-size high-performance NFC antenna structure |
| 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 |
| 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 |
| CN204947083U (en) * | 2015-07-10 | 2016-01-06 | 惠州硕贝德无线科技股份有限公司 | A kind of NFC antenna structure of metal back cover |
| WO2016056736A1 (en) * | 2014-10-10 | 2016-04-14 | 에이큐 주식회사 | Near field communication antenna and smart phone having antenna |
| CN105680157A (en) * | 2014-12-04 | 2016-06-15 | Tdk株式会社 | Antenna device and portable electronic device using the same |
| CN205846205U (en) * | 2016-06-29 | 2016-12-28 | 禾邦电子(苏州)有限公司 | NFC antenna under semi-closed metal slit environment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130126622A1 (en) * | 2011-08-08 | 2013-05-23 | David Finn | Offsetting shielding and enhancing coupling in metallized smart cards |
-
2016
- 2016-06-29 CN CN201610494748.0A patent/CN107546463B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008131115A (en) * | 2006-11-17 | 2008-06-05 | Tamura Seisakusho Co Ltd | Antenna coil and communication apparatus |
| JP2013168894A (en) * | 2012-02-17 | 2013-08-29 | Murata Mfg Co Ltd | Antenna device and communication terminal having the same |
| WO2014167812A1 (en) * | 2013-04-12 | 2014-10-16 | パナソニック株式会社 | Antenna, antenna device and communication device |
| WO2015101213A1 (en) * | 2013-12-31 | 2015-07-09 | Byd Company Limited | Nfc antenna assembly |
| WO2016056736A1 (en) * | 2014-10-10 | 2016-04-14 | 에이큐 주식회사 | Near field communication antenna and smart phone having antenna |
| CN204271251U (en) * | 2014-11-17 | 2015-04-15 | 惠州硕贝德无线科技股份有限公司 | A kind of NFC antenna of all-metal back of the body lid |
| CN105680157A (en) * | 2014-12-04 | 2016-06-15 | Tdk株式会社 | Antenna device and portable electronic device using the same |
| 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 |
| CN204947083U (en) * | 2015-07-10 | 2016-01-06 | 惠州硕贝德无线科技股份有限公司 | A kind of NFC antenna structure of metal back cover |
| CN105024169A (en) * | 2015-07-15 | 2015-11-04 | 深圳市信维通信股份有限公司 | Small-size high-performance NFC antenna structure |
| 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 |
| 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 |
| CN205846205U (en) * | 2016-06-29 | 2016-12-28 | 禾邦电子(苏州)有限公司 | NFC antenna under semi-closed metal slit environment |
Non-Patent Citations (3)
| Title |
|---|
| Application and development of RFID technique;Liu Chunli et al.;《2012 2nd International Conference on Consumer Electronics, Communications and Networks (CECNet)》;20120517;全文 * |
| NFC手机天线设计方法;刘晖等;《信息技术与标准化》;20141118(第9期);全文 * |
| 特高频NFC天线的研究与设计;王俊;《中国硕士学位论文全文数据库》;20131215;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107546463A (en) | 2018-01-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9455498B2 (en) | Antenna device and electronic device | |
| US9294871B2 (en) | Electronic mobile device | |
| US9083073B2 (en) | Thin chassis near field communication (NFC) antenna integration | |
| US20160380332A1 (en) | RFID Antenna Structure | |
| US9537523B2 (en) | Cover of a handheld electronic device | |
| TWI521784B (en) | Antenna structure and mobile device | |
| CN107546463B (en) | NFC antenna in semi-closed metal gap environment | |
| CN106410400B (en) | Communication equipment with metal shell and NFC structure thereof | |
| JP5598641B1 (en) | Information terminal equipment | |
| WO2017000768A1 (en) | Nfc antenna and mobile terminal having same | |
| CN205846205U (en) | NFC antenna under semi-closed metal slit environment | |
| KR102119533B1 (en) | Rear cover and portable device having the antenna | |
| JP6347607B2 (en) | Electronics | |
| WO2020034657A1 (en) | Wireless communication antenna structure for both heat dissipation and radiation | |
| KR20150105513A (en) | Metal card with antenna | |
| JP6374515B2 (en) | Near-field coil and method | |
| CN206040939U (en) | Wireless communication device | |
| CN107293849B (en) | NFC antenna structure and mobile terminal | |
| CN205355239U (en) | Three -dimensional NFC antenna under fluting metallic structure environment | |
| CN107871928A (en) | A kind of NFC communication antennas and NFC communication apparatus | |
| CN204045713U (en) | A kind of mobile terminal | |
| CN106571522A (en) | Antenna for mobile phones with metal back shell and mobile phone using same | |
| CN107293856B (en) | NFC antenna structure and mobile terminal | |
| CN206098696U (en) | NFC communications array and NFC communications facilities | |
| KR102348362B1 (en) | Coil module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |