CN101232124A - Method for making near-field communication aerial - Google Patents
Method for making near-field communication aerial Download PDFInfo
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- CN101232124A CN101232124A CNA2008100651774A CN200810065177A CN101232124A CN 101232124 A CN101232124 A CN 101232124A CN A2008100651774 A CNA2008100651774 A CN A2008100651774A CN 200810065177 A CN200810065177 A CN 200810065177A CN 101232124 A CN101232124 A CN 101232124A
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- voice coil
- field communication
- output circuit
- power amplifier
- loud speaker
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Abstract
The invention provides a method for fabricating near-field communication antenna, which adopts a speaker voice coil applied in mobile communication equipment as the antenna for near-field communication. Compared with special coil in prior art, the antenna fabricated by the invention has larger antenna, thus increasing the radiation efficiency of electromagnetic wave signal and the communication distance between equipments. Meanwhile, the mobile communication equipment obviates the need of additional special coil, thus solving the space difficulty and reducing the cost of the mobile communication equipment.
Description
Technical field
The present invention relates to near-field communication technology (Near Field Communication), especially the near field communication technology is embedded in the mobile communication equipment.
Background technology
Near-field communication Near Field Communication (being called for short NFC) is a kind of short-distance wireless interconnection technique, can make between the electronic equipment and to realize radio interconnectedly, its principle is to carry out short-range information exchange by exchange electromagnetic wave signal between the electronic equipment.
Near-field communication (NFC) technology is communicated by letter with untouchable because of its security feature, more and more is subjected to people's attention in recent years.As, existing mobile communication equipment manufacturer successively is embedded in the near-field communication technology at mobile communication product, promptly adds a NFC radio-frequency (RF) power amplification output circuit on the pcb board of mobile communication product.Have one need are treated the rf power amplifier and the electric capacity that is connected with amplifirer that the electricity signal amplifies in this NFC radio-frequency (RF) power amplification output circuit, output at this NFC radio-frequency (RF) power amplification output circuit also need connect an antenna, electric capacity in this antenna and the NFC radio-frequency (RF) power amplification output circuit constitutes resonant circuit, and launch the electromagnetic wave signal that this resonant circuit produces, thereby carry out short-range information exchange by the exchange electromagnetic wave between the realization equipment by this antenna.Generally, required antenna is to add a special-purpose coil in mobile communication equipment, but along with mobile communication equipment is more and more microminiaturized, its volume inside is then more and more limited, thereby cause being difficult to find suitable space to be used to settle special-purpose coil, and the extra special-purpose coil that adds has increased the cost of mobile communication product.
Thereby, the near-field communication technology is embedded in the mobile communication equipment, can solve the predicament of its inner space, can cost-effective problem values get people's research again.
Summary of the invention
The technical problem that the present invention need solve is to overcome above-mentioned the deficiencies in the prior art, and a kind of method of making near-field communication aerial is provided, and the antenna that gets by this method making can obtain bigger communication distance and radiation efficiency.
According to the above-mentioned technical problem that needs solution, designed a kind of method of making near-field communication aerial, the step of this method comprises:
1), the mobile communication equipment that provides an inside to embed near field communication radio frequency power amplifier output circuit in advance, include electric capacity in this near field communication radio frequency power amplifier output circuit;
(2), a loud speaker that is applied in the described mobile communication equipment is provided, include voice coil loudspeaker voice coil in this loud speaker;
(3), draw two terminals from the voice coil loudspeaker voice coil of loud speaker, and make these two terminals insert described near field communication radio frequency power amplifier output circuit, electric capacity in the voice coil loudspeaker voice coil of loud speaker and this near field communication radio frequency power amplifier output circuit constitutes resonant circuit, thereby realizes by the voice coil loudspeaker voice coil of loud speaker is launched electromagnetic wave signal as the antenna of near-field communication.
Improve as optimization of the present invention, the electric capacity in the described near field communication radio frequency power amplifier output circuit is arranged on the basin frame of loud speaker internal fixation voice coil loudspeaker voice coil.
The present invention compared with prior art has the following advantages:
To be applied to loudspeaker voice coil in the mobile communication equipment as the antenna of near-field communication, the special-purpose coil of Cai Yonging compared to existing technology, the antenna area of gained of the present invention is bigger, thereby has increased the radiation efficiency of electromagnetic wave signal and the communication distance between equipment and the equipment; Simultaneously, do not need the extra special-purpose coil that increases in mobile communication equipment, the space predicament that had both solved mobile communication equipment has reduced cost again.
Description of drawings
Fig. 1 is embodiment of the present invention mobile phone and the internal structure schematic diagram that is applied to loud speaker in the mobile phone;
Fig. 2 is the circuit diagram of embodiment of the present invention;
Equivalent circuit diagram when Fig. 3 is NFC radio-frequency (RF) power amplification output circuit of the present invention work.
Embodiment
The invention will be further described below in conjunction with drawings and embodiments.
As shown in Figure 1, the present invention need provide a cell phone (not shown) and a loud speaker 10.Embed the radio-frequency (RF) power amplification output circuit of near-field communication (NFC) on the pcb board 3 in this cell phone in advance, capacitor C 1 and C2 that this NFC radio-frequency (RF) power amplification output circuit includes rf power amplifier and connects with the rf power amplifier two ends respectively, rf power amplifier are used for cell phone need be waited that the signal of sending out or exchanging amplifies.This loud speaker 10 is arranged at the purpose that has reached pronunciation in the cell phone, its inside includes voice coil loudspeaker voice coil 11, the fixing basin frame 12 of voice coil loudspeaker voice coil, the terminals B1 and the B2 that draw from voice coil loudspeaker voice coil 11 are the audio electrical signal input, this audio electrical signal input accessing to audio power amplifier output circuit.On the pcb board 3 that the capacitor C 1 of embodiment of the present invention and C2 can be placed in cell phone, also can be placed in (not shown) on the basin frame 12, be placed in the space that to save on the basin frame 2 on the pcb board 3.
An important step of the present invention is to draw terminals A1 and A2 from the voice coil loudspeaker voice coil 11 of loud speaker 10, and makes this wiring section A1 and A2 insert the output of NFC radio-frequency (RF) power amplification output circuit.
Finish above-mentioned step, the circuit connecting relation of above-mentioned each element as shown in Figure 2, it comprises the NFC radio-frequency (RF) power amplification output circuit that embeds in advance in the audio frequency power amplifier output circuit of loud speaker 10 and the cell phone.The output of audio frequency power amplifier output circuit and NFC radio-frequency (RF) power amplification output circuit all links to each other with the voice coil loudspeaker voice coil 11 of loud speaker 10.Inductance L 1 and L2 that the audio frequency power amplifier output circuit includes audio power amplifier and connects with the audio power amplifier two ends respectively.Capacitor C 1 and C2 that NFC radio-frequency (RF) power amplification output circuit includes rf power amplifier and connects with the rf power amplifier two ends respectively.
When the audio frequency power amplifier output circuit is worked, its operating frequency section is 0～22KHZ, and capacitor C 1 and C2 in the NFC radio-frequency (RF) power amplification output circuit present high impedance or resistance at this frequency band, so that can be considered disconnection, when being the work of audio frequency power amplifier output circuit, NFC radio-frequency (RF) power amplification output circuit is not worked.
Equally, when NFC radio-frequency (RF) power amplification output circuit is worked, its operating frequency is 13.56MHz, inductance L 1 and L2 in the audio frequency power amplifier output circuit present high impedance or resistance in this frequency, so that can be considered disconnection, when being the work of NFC radio-frequency (RF) power amplification output circuit, the audio frequency power amplifier output circuit is not worked.
The present invention can separate audio frequency output and NFC output.Thereby, when the cellphone subscriber need use the near-field communication technology to carry out short haul connection, the work of NFC radio-frequency (RF) power amplification output circuit, the audio frequency power amplifier output circuit is not worked, and circuit equivalent shown in Figure 2 is a circuit shown in Figure 3.The voice coil loudspeaker voice coil 11 of the loud speaker 10 of this moment is equal to an inductance L, and capacitor C 1 in this circuit and capacitor C 2 and inductance L constitute a resonant circuit, launches the electromagnetic wave signal that this resonant circuit produces as the loudspeaker voice coil of inductance L simultaneously.
The present invention utilizes the antenna of the voice coil loudspeaker voice coil of loud speaker as NFC, and the antenna area of gained is big, thereby has increased the radiation efficiency of electromagnetic signal and the communication distance between equipment and the equipment; Also solve the space predicament of cell phone simultaneously and reduced the cost of product.
Above-described only is preferred implementation of the present invention, should be pointed out that for the person of ordinary skill of the art at this, under the prerequisite that does not break away from the invention design, can also make improvement, but these all belongs to protection scope of the present invention.
Claims (2)
1. method of making near-field communication aerial, it is characterized in that: the step of this method comprises:
(1), the mobile communication equipment that provides an inside to embed near field communication radio frequency power amplifier output circuit in advance, include electric capacity in this near field communication radio frequency power amplifier output circuit;
(2), a loud speaker that is applied in the described mobile communication equipment is provided, include voice coil loudspeaker voice coil in this loud speaker;
(3), draw two terminals from the voice coil loudspeaker voice coil of loud speaker, and make these two terminals insert described near field communication radio frequency power amplifier output circuit, electric capacity in the voice coil loudspeaker voice coil of loud speaker and this near field communication radio frequency power amplifier output circuit constitutes resonant circuit, thereby realizes by the voice coil loudspeaker voice coil of loud speaker is launched electromagnetic wave signal as the antenna of near-field communication.
2. the method for making near-field communication aerial according to claim 1 is characterized in that: the electric capacity in the described near field communication radio frequency power amplifier output circuit is arranged on the basin frame of loud speaker internal fixation voice coil loudspeaker voice coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100651774A CN101232124A (en) | 2008-01-11 | 2008-01-11 | Method for making near-field communication aerial |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100651774A CN101232124A (en) | 2008-01-11 | 2008-01-11 | Method for making near-field communication aerial |
Publications (1)
| Publication Number | Publication Date |
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| CN101232124A true CN101232124A (en) | 2008-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008100651774A Pending CN101232124A (en) | 2008-01-11 | 2008-01-11 | Method for making near-field communication aerial |
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| CN (1) | CN101232124A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102082838A (en) * | 2011-01-24 | 2011-06-01 | 中兴通讯股份有限公司 | Wireless communication device |
| CN101719586B (en) * | 2009-12-29 | 2012-12-12 | 深圳市信维通信股份有限公司 | Communication device, horn and antenna assembly thereof |
| WO2013159429A1 (en) * | 2012-04-27 | 2013-10-31 | 中兴通讯股份有限公司 | Nfc communication module |
| CN103515698A (en) * | 2012-06-28 | 2014-01-15 | 比亚迪股份有限公司 | NFC (Near Field Communication) antenna and electronic equipment |
| CN104009295A (en) * | 2013-02-26 | 2014-08-27 | 深圳富泰宏精密工业有限公司 | Near-field communication antenna and portable electronic device with antenna |
| US8909162B2 (en) | 2012-09-07 | 2014-12-09 | Infineon Technologies Ag | System and method for transmitting a radio frequency signal through a speaker coil |
| US9024576B2 (en) | 2011-11-17 | 2015-05-05 | Nokia Technologies Oy | Inductive charging of a rechargeable battery |
| WO2015172483A1 (en) * | 2014-05-15 | 2015-11-19 | 中兴通讯股份有限公司 | Near field communication device and working method, mobile terminal thereof |
| US9379777B2 (en) | 2012-05-07 | 2016-06-28 | Nokia Technologies Oy | Near field communication circuitry used for hearing aid compatibility |
| US9401768B2 (en) | 2011-09-16 | 2016-07-26 | Nokia Technologies Oy | Near field communication apparatus |
| CN106252836A (en) * | 2016-09-22 | 2016-12-21 | 青岛海信移动通信技术股份有限公司 | Terminal and the implementation method of NFC antenna thereof |
| CN107112635A (en) * | 2014-11-13 | 2017-08-29 | 株式会社Hctm | Mobile device coil form loop aerial |
| CN112404907A (en) * | 2019-11-18 | 2021-02-26 | 国网江苏省电力有限公司南通供电分公司 | Preparation method of loop antenna |
| CN113840214A (en) * | 2021-09-28 | 2021-12-24 | 维沃移动通信有限公司 | Loudspeaker module, loudspeaker, signal processing system and mobile terminal |
-
2008
- 2008-01-11 CN CNA2008100651774A patent/CN101232124A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101719586B (en) * | 2009-12-29 | 2012-12-12 | 深圳市信维通信股份有限公司 | Communication device, horn and antenna assembly thereof |
| WO2012100486A1 (en) * | 2011-01-24 | 2012-08-02 | 中兴通讯股份有限公司 | Wireless communication equipment |
| CN102082838A (en) * | 2011-01-24 | 2011-06-01 | 中兴通讯股份有限公司 | Wireless communication device |
| US9401768B2 (en) | 2011-09-16 | 2016-07-26 | Nokia Technologies Oy | Near field communication apparatus |
| US9024576B2 (en) | 2011-11-17 | 2015-05-05 | Nokia Technologies Oy | Inductive charging of a rechargeable battery |
| WO2013159429A1 (en) * | 2012-04-27 | 2013-10-31 | 中兴通讯股份有限公司 | Nfc communication module |
| US9379777B2 (en) | 2012-05-07 | 2016-06-28 | Nokia Technologies Oy | Near field communication circuitry used for hearing aid compatibility |
| CN103515698A (en) * | 2012-06-28 | 2014-01-15 | 比亚迪股份有限公司 | NFC (Near Field Communication) antenna and electronic equipment |
| US8909162B2 (en) | 2012-09-07 | 2014-12-09 | Infineon Technologies Ag | System and method for transmitting a radio frequency signal through a speaker coil |
| CN104009295A (en) * | 2013-02-26 | 2014-08-27 | 深圳富泰宏精密工业有限公司 | Near-field communication antenna and portable electronic device with antenna |
| CN104009295B (en) * | 2013-02-26 | 2018-04-24 | 深圳富泰宏精密工业有限公司 | Near-field communication aerial and the portable electron device with the antenna |
| WO2015172483A1 (en) * | 2014-05-15 | 2015-11-19 | 中兴通讯股份有限公司 | Near field communication device and working method, mobile terminal thereof |
| CN105099523A (en) * | 2014-05-15 | 2015-11-25 | 中兴通讯股份有限公司 | Near filed communication apparatus and work method thereof, and mobile terminal |
| CN107112635A (en) * | 2014-11-13 | 2017-08-29 | 株式会社Hctm | Mobile device coil form loop aerial |
| CN106252836A (en) * | 2016-09-22 | 2016-12-21 | 青岛海信移动通信技术股份有限公司 | Terminal and the implementation method of NFC antenna thereof |
| CN112404907A (en) * | 2019-11-18 | 2021-02-26 | 国网江苏省电力有限公司南通供电分公司 | Preparation method of loop antenna |
| CN112404907B (en) * | 2019-11-18 | 2021-09-10 | 国网江苏省电力有限公司南通供电分公司 | Preparation method of loop antenna |
| CN113840214A (en) * | 2021-09-28 | 2021-12-24 | 维沃移动通信有限公司 | Loudspeaker module, loudspeaker, signal processing system and mobile terminal |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20080730 |