CN202276343U - Near field communication module - Google Patents
Near field communication module Download PDFInfo
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- CN202276343U CN202276343U CN2011204190632U CN201120419063U CN202276343U CN 202276343 U CN202276343 U CN 202276343U CN 2011204190632 U CN2011204190632 U CN 2011204190632U CN 201120419063 U CN201120419063 U CN 201120419063U CN 202276343 U CN202276343 U CN 202276343U
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- 238000004891 communication Methods 0.000 title claims abstract description 33
- 238000012545 processing Methods 0.000 claims abstract description 14
- 239000013078 crystal Substances 0.000 claims abstract description 10
- 230000033228 biological regulation Effects 0.000 claims description 14
- 230000002093 peripheral effect Effects 0.000 abstract description 6
- 239000003990 capacitor Substances 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract 2
- 230000005540 biological transmission Effects 0.000 description 7
- 238000013461 design Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
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- 229910000859 α-Fe Inorganic materials 0.000 description 1
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Abstract
The utility model discloses a near field communication module, which comprises a radio frequency unit, a control unit, a baseband processing unit and a regulated power supply unit, wherein the radio frequency unit comprises a radio frequency chip subunit and an RC (resistor-capacitor) resonance circuit, the control unit and the baseband processing unit are integrated in the radio frequency chip subunit, the regulated power supply unit supplies power voltage to the radio frequency chip subunit, and the RC resonance circuit is connected with the radio frequency chip subunit, and is used for providing an outward antenna interface. The near field communication module modularizes and subminiaturizes the NFC (near field communication) function, the radio frequency chip subunit which carries out the payment function of an NFC mobile phone, a peripheral circuit, a crystal oscillator unit, the RC resonance circuit and the like can be integrated in one module,a power interface, the antenna interface and a communication interface are provided in terms of outward hardware, an application programming interface (API) is provided in terms of software, and thereby the near field communication module can be transplanted into the mobile phone or other hand-held devices after corresponding software and hardware are connected.
Description
Technical field
The utility model belongs to the REID field, is specifically related to a kind of micro embedded near-field communication module.
Background technology
(Near Field Communication NFC), claims wireless near field communication again to near-field communication, is a kind of short-range high frequency wireless communication technology, allows to carry out between the electronic equipment contactless Point-to-Point Data Transmission (in ten centimetres) and exchange.(Radio Frequency Identification RFID) develops this technology, and backward compatible RFID, is promoted mainly by Philips, Nokia and Sony the earliest, is mainly used in the handheld device such as mobile phone by exempting from the contact radio frequency identification.Because near-field communication has natural fail safe, therefore, the NFC technology is considered to have great application prospect in fields such as mobile-phone payments.
This NFC module of embedded in mobile phone is formed the part of RFID module, can be used as the RFID passive label and use---be used for defrayment; Also can be used as rfid interrogator---as exchanges data and collection.The multiple application of NFC technical support, comprise mobile payment and transaction, to equality communicate by letter and move in message reference etc.Through being equipped with the mobile phone of this NFC module, people can through any equipment, hope that with them the entertainment service and the transaction that obtain link together in any place, any time, thereby accomplish payment, obtain functions such as placard information.NFC equipment can be used as read write line terminal and the equipment of contact type intelligent card, the smart card data transmission link to equipment, and its application mainly can be divided into following four fundamental types: be used for payment and booking, be used for electronic bill, be used for smart media and be used for exchange, transmission data.
According to the formal NFC technological architecture figure that externally announces NFC forum in June, 2006, specifically shown in Figure 1.Wherein, little processing is the processor part at mobile phone or other terminal, realizes the control to this NFC module through interface.But what existing NFC module adopted mostly is the twin-core sheet scheme of NFC chip PN544 and auxiliary security chip SmartMx combination thereof; And chip exterior also has a lot of chip and circuit of realizing various additional functions, so that the excessive and inconvenient use of NFC module volume.
The utility model content
The purpose of the utility model is in order to solve the problems referred to above that existing NFC module exists, to have proposed a kind of near-field communication module.
Concrete technical scheme is: a kind of near-field communication module; Comprise radio frequency unit, control unit, baseband processing unit and power supply unit of voltage regulation, wherein, said radio frequency unit comprises radio frequency chip subelement and RC resonant circuit; Said control unit and baseband processing unit are integrated in the radio frequency chip subelement; Said power supply unit of voltage regulation is that said radio frequency chip subelement provides supply voltage, and said RC resonant circuit is connected with the radio frequency chip subelement, is used to the antennal interface that provides external.
Further, said near-field communication module also comprises the crystal oscillator unit, for described radio frequency chip subelement provides external clock.
Further, described radio frequency chip subelement is specifically realized through the PN65N chip.
Further, described power supply unit of voltage regulation is specifically realized through the PAM3013DAB33 chip.
The beneficial effect of the utility model: the near-field communication module of the utility model is with NFC function modoularization, subminaturization; Can radio frequency chip subelement that realize NFC mobile-phone payment function and peripheral circuit thereof, crystal oscillator unit, RC resonant circuit etc. be integrated in the module; Externally on the hardware power interface, antennal interface and communication interface are provided; Api interface is provided on the software; Carry out to be transplanted to mobile phone or other handheld device after soft accordingly, hardware connects thereby be implemented in, thereby let equipment that this module is housed realize that payment function, snap gauge based on NFC intend function and point communications functionality.
Description of drawings
Fig. 1 is NFC technological architecture figure.
Fig. 2 is the NFC module principle sketch map of the utility model.
Fig. 3 is the NFC modular structure block diagram of the utility model.
Fig. 4 is the power supply unit of voltage regulation circuit theory sketch map of the utility model.
Fig. 5 is the radio frequency chip subelement circuit theory sketch map of the utility model.
Fig. 6 is the RC resonant circuit and the antenna circuit principle schematic of the utility model.
Fig. 7 is the basic peripheral circuit principle schematic in the crystal oscillator unit of the utility model.
Embodiment
Below in conjunction with accompanying drawing and concrete embodiment the utility model is further described.
The near-field communication module of the utility model; Comprise radio frequency unit, control unit, baseband processing unit and power supply unit of voltage regulation, wherein, radio frequency unit comprises radio frequency chip subelement and RC resonant circuit; Said control unit and baseband processing unit are integrated in the radio frequency chip subelement; Said power supply unit of voltage regulation is that said radio frequency chip subelement provides supply voltage, and said RC resonant circuit is connected with the radio frequency chip subelement, is used to the antennal interface that provides external.
Wherein, control unit and baseband processing unit are to be integrated in the radio frequency chip subelement, are not described in detail at this.Mainly introduce radio frequency unit and power supply unit of voltage regulation here.
Near-field communication module also comprises the crystal oscillator unit, for described radio frequency chip subelement provides external clock.
The radio frequency chip subelement is here specifically realized through the PN65N chip.
Fig. 3 has provided a kind of near-field communication module structured flowchart.Specifically describe below.
Power supply unit of voltage regulation: shown in Figure 4 is power supply unit of voltage regulation U2 (being PAM3013DAB33), and power supply unit of voltage regulation provides its required voltage value for each unit, and it belongs to low pressure differential (LDO) voltage stabilizing chip, and LDO voltage stabilizing chip cost is low, and noise is low, and quiescent current is little.Simultaneously its outward element of needing also seldom only needs one or two shunt capacitance usually, has so just simplified the peripheral circuit of chip greatly.Add the utility model and adopt the single supply design, the volume of whole design has just further obtained downsizing.1 pin of U2 (being PAM3013DAB33) is the chip enable end, connects 5V voltage, and C5 is a filter capacitor.R9, R10 are divider resistance, control output voltage, and C7 is a filter capacitor, and 5 pin are the chip output pin, and the operating voltage of each sub-cells in the radio frequency unit is 3.3V.
Radio frequency unit: comprise radio frequency chip subelement and RC resonant circuit and antenna, like Fig. 5, shown in Figure 6.
Shown in Figure 5 is radio frequency chip subelement in the radio frequency unit, and the radio frequency chip subelement is specifically realized through the PN65N chip here.The PN65N chip is the second generation NFC chip that NXP company goes out, it is integrated NFC chip PN544 and safety chip SmartMx, and major function is following: it is the special NFC chip to mobile phone that NXP releases, and supports the active pattern.Card reader pattern: the card of supporting to read ISO 15693, ISO14443TypeA, ISO14443TypeB, Sony Felica and Mifare Classic agreement; The virtual card pattern: be modeled to MIFARE card (integrated SmartMx), also can external UICC; NFC-IP1 pattern (promptly realizing the point-to-point communication pattern): transmission rate 106kbps, 212kbps or 424kbps.It provides 27.12Mhz crystal oscillator by the crystal oscillator in the module, by power supply unit of voltage regulation 3.3V is provided stable voltage.Externally PN65N realizes the processing of baseband signal under the control of interface, and signal is sent by antenna after the RC resonant circuit is handled.Antenna is treated as baseband signal with the signal that receives via radio frequency unit during reception, gives baseband processing unit and handles, and baseband processing unit converts baseband signal to control information that control unit can discern and gives control unit through external interface.
Radio frequency chip subelement inner integrated control unit (HT80C51MX) and baseband processing unit.Wherein VEN is the chip enable pin; VEN_MON is the voltage monitoring enable; TXD and RXD are respectively the transmission and reception pin of UART mouth; SIMVCC is to be the pin of SIM (this sentences mobile SIM is example) card power supply at chip operation chip under the Powered-by-Field pattern; SWP is the pin that chip and SIM communicate; TX1, TX2, RX, VMID be chip be used for and the RC match circuit between send out, receive radiofrequency signal and provide radio frequency to receive Voltage Reference; PF1, PF2 are that the snap gauge of chip is intended interface; IRQ is the chip interrupt request pin; RESET is a chip replacement pin.
Shown in Figure 6 is RC resonant circuit and antenna in the radio frequency unit.Wherein, pin TX1, TX2 are difference output, and RX is for receiving.Describe through radio-frequency transmissions part and radio frequency receiving unit below.
(1) radio-frequency transmissions part: TX1, TX2 differential signal are through inductance L 1, L2; The resonance of capacitor C 10, C11 is raised to the sine wave of 50V nearly to the TX square-wave signal from low-voltage; C12, C13 are capacitance; C18 and antenna are realized parallel resonance, make antenna obtain maximum electric current, offer the card energy.The intermediate point ground connection of general antenna helps improving indexs such as antistatic, spuious.
(2) radio frequency receiving unit: receive signal and enter on the RX pin through C14, R1, the bias voltage of VMID for receiving, outside C9 filtering improves stability, through R2 RX is setovered, and lets RX pin level be in the intermediate point of power supply, improves receiving sensitivity.
The communication distance of this module is less, so the coil form near field antenna that adopting process is simple, cost is low.Because the profile of mobile phone is less; The respective coil area is little also less; Aerial coil mutual induction amount M between NFC and read write line can not satisfy actual use like this. and therefore can be at the inner Ferrite Material that inserts of NFC aerial coil with high permeability u; To increase mutual induction amount, the problem that the bucking coil cross section reduces.Coil antenna can be used the circuit board material design of PCB (Printed Circuit Board) or FPC (Flexible Print Circuit).
C18 and antenna are implemented in 13.56MHz resonance, and antenna area as far as possible is big, such as 1 square decimeter; Distance is very good, and the number of turns is with regard to 1,2 circles, if area is smaller; Then the number of turns is more a little, such as 6 square centimeters, so the number of turns will 6 circle; The center of coil can ground connection, is in order to improve antistatic effect like this.
Regulate C18, make 2 peak-to-peak value maximums of C18, generally can reach more than the 30V; When noting debugging, must keep forging ahead final environmental consideration, rather than independent debugging antenna; Environment comprises card, shell, metalwork etc.; Especially card and metalwork are very big to the performance impact of antenna, are appreciated that to having reduced the inductance value of antenna.
After the resonance of having debugged antenna, the resonance that boosts of front has certain variation, debugs again, through like this, generally can both debug out satisfied effect.
It is too high to notice that voltage is not transferred, and the one, power consumption is excessive, and the 2nd, because Q value is too high, cause frequency band narrow, receive influencedly on the contrary, suitably reduce voltage this time, the 3rd, electric capacity generates heat too high, and general recommendations is with 0805 electric capacity that encapsulates.
Concrete design, debugging:
A. the design of antenna it is generally acknowledged area bigger good, reaches 10CM such as the antenna diameter of subway gate, and the number of turns of coiling is generally 2,3 circles; If antenna area is done not quite; The raising number of turns that can be suitable generally is controlled at the uH rank with inductance value, generally adopts between 1～5uH.
B. the adjusting of coupling, general L1, L2 adopt the 1uH inductance, preferably adopt wire-wound inductor.Adopt the wire-wound inductor of Japanese SAGAMI; The little performance of volume is good, and C10, C11 value are constant, the antenna resonance electric capacity of adjustment C18 or adjust the value of C12 and C13; (peak-to-peak value can reach 50V near reaching 50V to make the voltage of antenna ends; General recommendations is more than 30V), general voltage is high, and the distance of Card Reader can be distant.
C.C6, C16 have outside card reader to provide energy to be coupled to the work of chip internal confession the core of the card sheet to antenna for when chip operation during in mode card.
For the radio frequency chip subelement provides the concrete peripheral circuit in crystal oscillator unit of external clock as above shown in Figure 7, clock specifically adopts 27.12MHz.
The utility model module has volume little (10mm*11mm), characteristics low in energy consumption, and operating frequency is at 13.56Mhz.Because its volume is little; Can be directly embedded into and realize the NFC function in the mobile phone; Can provide at battery of mobile phone under the situation of this module operating voltage, module is operated under the Polling loop pattern and (circulates between various functions at PN65N chip operation state under this kind pattern), can realize mobile-phone payment; Point-to-point communication, the function that snap gauge is intended.Under the situation of mobile phone outage, this module can be operated in the Powered-by-Field pattern, by radiofrequency field the chip operation energy needed is provided, and under this kind pattern, this module can realize the function that snap gauge is intended.
To sum up can find out; The near-field communication module of the utility model is with NFC function modoularization, subminaturization; Can radio frequency chip subelement that realize NFC mobile-phone payment function and peripheral circuit thereof, crystal oscillator unit, RC resonant circuit etc. be integrated in the module; Externally on the hardware power interface, antennal interface and communication interface are provided; Api interface is provided on the software, carries out to be transplanted to mobile phone or other handheld device after soft accordingly, hardware connects, thereby let equipment that this module is housed realize that payment function, snap gauge based on NFC intend function and point communications functionality thereby be implemented in.
Those of ordinary skill in the art will appreciate that embodiment described here is in order to help the principle of reader understanding's the utility model, should to be understood that the protection range of the utility model is not limited to such special statement and embodiment.Those of ordinary skill in the art can make various other various concrete distortion and combinations that do not break away from the utility model essence according to disclosed these teachings of the utility model, and these distortion and combination are still in the protection range of the utility model.
Claims (4)
1. near-field communication module; Comprise radio frequency unit, control unit, baseband processing unit and power supply unit of voltage regulation, it is characterized in that radio frequency unit comprises radio frequency chip subelement and RC resonant circuit; Said control unit and baseband processing unit are integrated in the radio frequency chip subelement; Said power supply unit of voltage regulation is that said radio frequency chip subelement provides supply voltage, and said RC resonant circuit is connected with the radio frequency chip subelement, is used to the antennal interface that provides external.
2. near-field communication module according to claim 1 is characterized in that said near-field communication module also comprises the crystal oscillator unit, for described radio frequency chip subelement provides external clock.
3. near-field communication module according to claim 1 and 2 is characterized in that, described radio frequency chip subelement is specifically realized through the PN65N chip.
4. near-field communication module according to claim 1 and 2 is characterized in that, described power supply unit of voltage regulation is specifically realized through the PAM3013DAB33 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204190632U CN202276343U (en) | 2011-10-28 | 2011-10-28 | Near field communication module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011204190632U CN202276343U (en) | 2011-10-28 | 2011-10-28 | Near field communication module |
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| CN202276343U true CN202276343U (en) | 2012-06-13 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102930324A (en) * | 2012-11-30 | 2013-02-13 | 天津中环创新科技有限公司 | Active RFID (radio frequency identification) technical sensor tag |
| CN104662807A (en) * | 2012-07-02 | 2015-05-27 | 马维尔国际贸易有限公司 | Shaping near-field transmission signals |
| CN105406888A (en) * | 2015-12-21 | 2016-03-16 | 捷德（中国）信息科技有限公司 | Method for adjusting working frequency of mobile phone antenna and mobile phone |
| US9401737B1 (en) | 2007-09-21 | 2016-07-26 | Marvell International Ltd. | Circuits and methods for generating oscillating signals |
| CN107599758A (en) * | 2017-09-13 | 2018-01-19 | 深圳市永奥图电子有限公司 | A kind of tyre pressure sensor and tire pressure data query method |
| CN107657195A (en) * | 2017-10-19 | 2018-02-02 | 南通芯电物联网科技有限责任公司 | A kind of three-in-one control system based on NFC, RFID and bluetooth |
| CN108628416A (en) * | 2018-05-14 | 2018-10-09 | 马鞍山纽泽科技服务有限公司 | A kind of logistic information management device based on Internet of Things |
-
2011
- 2011-10-28 CN CN2011204190632U patent/CN202276343U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9401737B1 (en) | 2007-09-21 | 2016-07-26 | Marvell International Ltd. | Circuits and methods for generating oscillating signals |
| CN104662807A (en) * | 2012-07-02 | 2015-05-27 | 马维尔国际贸易有限公司 | Shaping near-field transmission signals |
| US9450649B2 (en) | 2012-07-02 | 2016-09-20 | Marvell World Trade Ltd. | Shaping near-field transmission signals |
| CN104662807B (en) * | 2012-07-02 | 2017-04-05 | 马维尔国际贸易有限公司 | Shaping is carried out to near-field emissions signal |
| CN102930324A (en) * | 2012-11-30 | 2013-02-13 | 天津中环创新科技有限公司 | Active RFID (radio frequency identification) technical sensor tag |
| CN105406888A (en) * | 2015-12-21 | 2016-03-16 | 捷德（中国）信息科技有限公司 | Method for adjusting working frequency of mobile phone antenna and mobile phone |
| CN107599758A (en) * | 2017-09-13 | 2018-01-19 | 深圳市永奥图电子有限公司 | A kind of tyre pressure sensor and tire pressure data query method |
| CN107599758B (en) * | 2017-09-13 | 2024-06-28 | 深圳市永奥图电子有限公司 | Tire pressure sensor and tire pressure data query method |
| CN107657195A (en) * | 2017-10-19 | 2018-02-02 | 南通芯电物联网科技有限责任公司 | A kind of three-in-one control system based on NFC, RFID and bluetooth |
| CN108628416A (en) * | 2018-05-14 | 2018-10-09 | 马鞍山纽泽科技服务有限公司 | A kind of logistic information management device based on Internet of Things |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120613 Termination date: 20141028 |
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