CN103219579B - Novel near field communication (NFC) antenna structure - Google Patents
Novel near field communication (NFC) antenna structure Download PDFInfo
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- CN103219579B CN103219579B CN201310124692.6A CN201310124692A CN103219579B CN 103219579 B CN103219579 B CN 103219579B CN 201310124692 A CN201310124692 A CN 201310124692A CN 103219579 B CN103219579 B CN 103219579B
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Abstract
A novel near field communication (NFC) antenna structure is applied to a terminal. The novel NFC antenna structure comprises an antenna module, a metal conductor module and a metal shell of the terminal, wherein the antenna module comprises an antenna coil, one side of the metal conductor module is tightly attached to the antenna coil, a first hole is formed in the metal conductor module, a first groove is formed from the center of the first hole to one side of the metal conductor module, the metal conductor module is enabled to be of a letter C-type opening, the metal shell is arranged on the other side of the metal conductor module, a second hole is formed in the metal shell, a second groove is formed from the center of the second hole to one side of the metal shell to enable the metal shell to be of a letter C-type opening, an insulating layer is arranged between the metal conductor module and the antenna module, and an insulating layer is arranged between the metal conductor module and the metal shell.
Description
Technical field
The present invention relates to communication technical field, particularly the novel NFC antenna structure of one.
Background technology
Antenna is a kind of device utilizing frequency characteristic to receive and transmit.In recent years, along with the development of wireless terminal and mechanics of communication, wireless near field communication (Near Field Communication, NFC) obtains increasing investigation and application.NFC technique starts from RFID tag (Radio Frequency Identify Detection) technology, and namely combining induction card reader and induction type card on one chip, realize point-to-point data exchanging function.NFC chip is contained on the mobile terminals such as mobile phone, can realize the function of doit electronic payment and Intelligent Recognition and transfer of data.By NFC function, mobile phone, PDA, realizes wireless connections and data sharing between many equipment such as computer easily.
Along with the designer trends that the mobile terminals such as mobile phone are light, thin, the miniaturization of NFC more and more comes into one's own.Designer has to realize in more and more less space the read-write capability of NFC.Simultaneously due to the outward appearance of wireless terminal, such as mobile phone, metal-back (as metal battery back of the body lid) becomes a kind of designer trends.But metal-back can electromagnetic radiation shielding, cause the coil of NFC cannot with metal-back beyond space carry out communication.
Certain company of Japan proposes a solution in this regard, and its scheme as shown in Figure 1, metal-back 100 is opened a hole 101, and from then on a groove 102 is opened at the center in hole 101, and this groove 102 reaches the edge of certain of shell 100 always.In the below of this metal aperture, place traditional aerial coil 202, i.e. the antenna of coil form.This antenna can do very little.The principle of this structure is, traditional NFC antenna becomes a driving source, and it adds on the metal-back of groove in perforate and induces wider electric current, and the radiation field that this electric current produces is as the means of near-field communication.Seeing of image, the metal-back that perforate adds groove act as the effect of an amplifier, only passive amplifier, it is the electric current in undersized NFC antenna, by the mode (passive mode) of induction, be coupled on larger sized metal-back, thus enhance the distance of communication.
The present invention is intended to propose the modified node method based on said structure, improves the distance of NFC communication further.
Summary of the invention
The present invention is directed to prior art above shortcomings, a kind of novel NFC antenna structure is provided, effectively increases the communication distance of NFC antenna.
The present invention is achieved through the following technical solutions:
A kind of novel NFC antenna structure, be applied to and comprise in the terminal of metal-back, novel NFC antenna structure comprises:
Anneta module, comprises aerial coil;
Metallic conductor module, aerial coil is close in side, metallic conductor module has one first hole, and the center of the first hole has one first groove to metallic conductor module, makes metallic conductor module in letter " C " type opening;
The metal-back of terminal, is arranged on the opposite side of metallic conductor module, metal-back has one second hole, and the center of the second hole has one second groove to metal-back, makes metal-back be letter " C " type opening;
Wherein, metallic conductor module and Anneta module, and comprise an insulating barrier respectively between metallic conductor module and metal-back.
Preferably, the position of the first hole corresponds to the position of the second hole.
Preferably, the first groove is different from the aperture position of the second groove.
Preferably, the first groove is contrary with the aperture position of the second groove.
Preferably, Anneta module also comprises Magnetic Substrate, and aerial coil is arranged on Magnetic Substrate side, in order to the metal material of the terminal of shielding magnetic substrate opposite side.
Preferably, Magnetic Substrate comprises the ferrite of hard magnetic or the flexible material containing magnetic.
Preferably, the area of metallic conductor module is greater than the area of aerial coil.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of existing antenna structure;
Fig. 2 is the structural representation of inventive antenna;
Fig. 3 is the structural representation of inventive antenna module;
Fig. 4 is the structural representation of metallic conductor module of the present invention;
Fig. 5 is another structural representation of metallic conductor module of the present invention;
Fig. 6 is the map of current of inventive antenna module;
Fig. 7 is the induced electricity flow graph of existing antenna;
Fig. 8 is induced electricity flow graph of the present invention;
Fig. 9 is the Distribution of Magnetic Field figure of existing antenna;
Figure 10 is Distribution of Magnetic Field figure of the present invention.
Embodiment
Elaborate to the present invention below in conjunction with embodiment, the present embodiment is implemented under premised on technical solution of the present invention, gives detailed execution mode, but protection scope of the present invention is not limited to following embodiment.
Please refer to accompanying drawing 2, a kind of novel NFC antenna structure, comprising: Anneta module 200, metallic conductor module 300, the metal-back 100 of terminal.
Referring to accompanying drawing 3-5, a kind of Anneta module 200, comprises aerial coil 202(near field communication antenna NFC coil) and contact point 203 and Magnetic Substrate 201.
Above this NFC coil, be have one piece of hole 301, and on certain, have the metallic conductor module 300 of fluting 302.This groove 302 reaches one side of metallic conductor from the center of hole 301 always.Form the hatch frame that is similar to " C " type.The metallic conductor module 300 of this " C " type and the laminating of NFC coil, and with very thin insulator separation (in order to isolate induced current between the two, induced current can be mentioned in subsequent content).
The effective area of the area ratio Anneta module 200 of metallic conductor module 300 is large, namely can the near field of abundant coupled antenna module 200 generation.
Further above this metallic conductor module 300, it is metal-back 100.This metal-back 100 can be the shell of mobile terminal.Above the hole 301 of metallic conductor module 300, also there is a hole 101 position corresponding to metal-back 100, and a groove 102 connects this perforate, extends to metal-back 100 certain.Metallic conductor module 300 and metal-back 100 fit tightly, and with very thin insulator separation (in order to isolate induced current between the two, induced current can be mentioned in subsequent content).The groove 302 of metallic conductor module 300 and the fluting of metal-back are in 180 degree of arrangements in the other direction, and namely 102 and 302 two grooves draw a straight line, but opening is in different directions.
Magnetic Substrate 201 is positioned at immediately below aerial coil 202, other metal below shielded coil, as battery, and circuit module etc.Magnetic Substrate 201 can be the ferrite of hard magnetic or the flexible material containing magnetic.
Detailed operation principle is as follows.Fig. 6 is the map of current of inventive antenna, returns another of contact point 203 from contact point 203 through aerial coil 202, forms closed circle.
Owing to being alternating current C1 in aerial coil 202, according to electromagnetic principle, this electric current produces the magnetic field of alternation as Fig. 7, for prior art, due to the existence of the metal-back 100 of aerial coil 202 superjacent air space, and the hole 101 above metal-back, the existence of groove 102, the magnetic field that aerial coil 202 produces is through hole 101, and groove 102, is radiated to the space of metal-back more than 100.The space of metal-back more than 100 is effective reading distance.
Please refer to Fig. 9, metal-back 100 produces induced current C2 towards the side of aerial coil 202, and round dot representative is outside perpendicular to plane, and fork representative is inside perpendicular to plane.This faradic flow direction is contrary with the streamline of coil current C1, hinders the further reinforcement in magnetic field.But the side that metal-back 100 deviates from aerial coil 202 creates and coil current induced current C2 ' in the same way, and this induced current will produce magnetic field M2 equally, and the M1 produced with coil current C1 superposes simultaneously, increase the reading distance of Anneta module.
For improving the reading distance of Anneta module further, in the present invention, metallic conductor module 300 plays a crucial role.As shown in figs, due to the introducing of metallic conductor module 300, and metallic conductor module 300 is nearer apart from Anneta module 200 than metal-back 100, so, in metallic conductor module 300 coupling produce with coil current C1 in the same way induced current C4 greatly increase, right reciprocal induced current C4 also increases to some extent simultaneously.Because metallic conductor module 300 area is greater than the effective area of Anneta module 200, make metallic conductor module 300 can the magnetic field of coupled antenna coil 202 as much as possible, and as much as possible be coupled by metal-back 100.
Simultaneously because metallic conductor module 300 is between metal-back 100 and Anneta module 200, even if metallic conductor module 300 and metal-back 100 have groove and the hole of same homalographic, the magnetic field of equal size will through more.So due to three aspect factor, the increase of coupling area, the increase in induced current and magnetic field, the reduction of distance of reaction, after magnetic field superposition, the radiation in metal-back more than 100 space also enhances.In Figure 10, the magnetic field M1 that Anneta module produces, metallic conductor module 300 responds to the magnetic field M3 produced, and metal-back 100 responds to the magnetic field M2 produced.Experiment shows, due to the existence of metallic conductor module 300, effective communication distance adds 15%.
The shape of the hole 301 of metallic conductor module 300 might not be circular, and also can be shape as shown in Figure 5, technical staff can be designed to arbitrary shape according to actual conditions.Hole 301 also can be designed to identical with the size of hole 101 according to the actual requirements, or different (in general, different situations is mainly designed to slightly different).Certainly, groove 302 and groove 102 might not be straight line, also can be curves.The present invention does not limit these contents above-mentioned, and technical staff can make arbitrary change according to thought of the present invention.
Be only a specific embodiment of the application above, but the application is not limited thereto, the changes that any person skilled in the art can think of, all should drops in the protection range of the application.
Claims (3)
1. a novel NFC antenna structure, is applied to and comprises in the terminal of metal-back, it is characterized in that, described novel NFC antenna structure comprises:
Anneta module, comprises aerial coil;
Metallic conductor module, described aerial coil is close in side, described metallic conductor module has one first hole, and the center of described first hole has one first groove to described metallic conductor module, makes described metallic conductor module in letter " C " type opening;
The metal-back of described terminal, is arranged on the opposite side of described metallic conductor module, described metal-back has one second hole, and the center of described second hole has one second groove to described metal-back, makes described metal-back in letter " C " type opening;
Wherein, described metallic conductor module and described Anneta module, and comprise an insulating barrier respectively between described metallic conductor module and described metal-back; The area of described metallic conductor module is greater than the area of described aerial coil; Described first groove is contrary with the aperture position of described second groove;
The position of described first hole corresponds to the position of described second hole.
2. a kind of novel NFC antenna structure as claimed in claim 1, it is characterized in that, described Anneta module also comprises Magnetic Substrate, and described aerial coil is arranged on described Magnetic Substrate side, in order to shield the metal material of the described terminal of described Magnetic Substrate opposite side.
3. a kind of novel NFC antenna structure as claimed in claim 2, is characterized in that, described Magnetic Substrate comprises the ferrite of hard magnetic or the flexible material containing magnetic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310124692.6A CN103219579B (en) | 2013-04-11 | 2013-04-11 | Novel near field communication (NFC) antenna structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310124692.6A CN103219579B (en) | 2013-04-11 | 2013-04-11 | Novel near field communication (NFC) antenna structure |
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| Publication Number | Publication Date |
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| CN103219579A CN103219579A (en) | 2013-07-24 |
| CN103219579B true CN103219579B (en) | 2015-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310124692.6A Expired - Fee Related CN103219579B (en) | 2013-04-11 | 2013-04-11 | Novel near field communication (NFC) antenna structure |
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Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11354558B2 (en) | 2013-01-18 | 2022-06-07 | Amatech Group Limited | Contactless smartcards with coupling frames |
| CN104681990A (en) * | 2013-11-29 | 2015-06-03 | 惠州比亚迪实业有限公司 | NFC (near field communication) antenna and mobile terminal |
| CN104682005A (en) * | 2013-11-29 | 2015-06-03 | 佳邦科技股份有限公司 | Antenna structure |
| EP3090469B1 (en) | 2013-12-31 | 2019-06-26 | BYD Company Limited | Nfc antenna assembly |
| CN104752808B (en) * | 2013-12-31 | 2017-12-08 | 惠州比亚迪实业有限公司 | Nfc antenna component |
| US10186753B2 (en) * | 2014-01-31 | 2019-01-22 | Tdk Corporation | Antenna device and portable electronic device using the same |
| KR101556666B1 (en) * | 2014-03-12 | 2015-10-01 | (주)파트론 | portable terminal, case of portable terminal for NFC antenna |
| FR3030908B1 (en) | 2014-12-18 | 2016-12-09 | Stmicroelectronics Rousset | ANTENNA FOR ELECTRONIC DEVICE |
| JP2016140026A (en) * | 2015-01-29 | 2016-08-04 | Tdk株式会社 | Antenna device |
| CN105006654A (en) * | 2015-07-08 | 2015-10-28 | 深圳市信维通信股份有限公司 | Figure-eight-shaped NFC antenna with metal rear housing |
| CN105024169B (en) * | 2015-07-15 | 2019-08-27 | 深圳市信维通信股份有限公司 | A kind of high performance NFC antenna structure of small size |
| CN105048097B (en) * | 2015-09-01 | 2017-05-24 | 上海安费诺永亿通讯电子有限公司 | Three-dimensional near-field antenna structure |
| CN106099327B (en) * | 2016-06-28 | 2019-07-30 | 惠州硕贝德无线科技股份有限公司 | Near field antenna device and its equipment |
| CN107196060B (en) * | 2017-05-04 | 2023-07-25 | 上海德门电子科技有限公司 | NFC structure without antenna based on metal backshell |
| CN110168807B (en) * | 2017-08-08 | 2020-11-06 | 华为技术有限公司 | Antenna assembly and terminal |
| CN114389032A (en) * | 2020-10-19 | 2022-04-22 | Oppo广东移动通信有限公司 | Antenna device and electronic apparatus |
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| EP2372840A2 (en) * | 2010-03-17 | 2011-10-05 | Panasonic Corporation | Antenna portable terminal using the same |
| KR20120103300A (en) * | 2011-03-10 | 2012-09-19 | 주식회사 아모텍 | A nfc antenna module |
| EP2568534A2 (en) * | 2009-04-21 | 2013-03-13 | Murata Manufacturing Co., Ltd. | Antenna devie and method of setting resonant frequency of antenna device |
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2013
- 2013-04-11 CN CN201310124692.6A patent/CN103219579B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2568534A2 (en) * | 2009-04-21 | 2013-03-13 | Murata Manufacturing Co., Ltd. | Antenna devie and method of setting resonant frequency of antenna device |
| EP2372840A2 (en) * | 2010-03-17 | 2011-10-05 | Panasonic Corporation | Antenna portable terminal using the same |
| KR20120103300A (en) * | 2011-03-10 | 2012-09-19 | 주식회사 아모텍 | A nfc antenna module |
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| CN103219579A (en) | 2013-07-24 |
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Granted publication date: 20150506 Termination date: 20210411 |