CN104794521A - Non-contact radio frequency communication NFC integrated card with distance control - Google Patents
Non-contact radio frequency communication NFC integrated card with distance control Download PDFInfo
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- CN104794521A CN104794521A CN201410021585.5A CN201410021585A CN104794521A CN 104794521 A CN104794521 A CN 104794521A CN 201410021585 A CN201410021585 A CN 201410021585A CN 104794521 A CN104794521 A CN 104794521A
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Abstract
The invention discloses a non-contact radio frequency communication NFC integrated card with distance control, which relates to the technical field of mobile payment. The non-contact radio frequency communication NFC integrated card with distance control comprises a CPU smart card and an NFC module, and is characterized in that the NFC module comprises an NFC radio frequency function module, a tunable antenna and a control function module; the NFC radio frequency function module comprises a receiving unit with adjustable receiving sensitivity, a digital signal processing unit and a transmitting unit with adjustable transmitting power connected in sequence; the control function module comprises a tuning control unit, a computation unit and a configuration unit; and the tunable antenna comprises an antenna coil, a resonant capacitor and a tunable resonant capacitor array connected in a parallel mode. The problem of too much change of an effective communication distance between a mobile phone SIM card/SD card integrated with the NFC module used in mobile terminals of different brands and different types and a card reader, the use method is simple and convenient, and the compatible rate of the SIM card/SD card with mobile phones/mobile devices of different brands and types is improved.
Description
Technical field
The present invention relates to mobile payment technical field, the NFC particularly based on the Non-contact radio-frequency communication band distance controlling of SIM card/SD card blocks entirely.
Background technology
Along with the lifting of smart mobile phone occupation rate on mobile device market, the relevant wireless application based on smart mobile phone is greatly promoted and is developed.Business model based on wireless application also presents the fast-developing impetus, and therefore, be necessary bank card to pay, the multiple conventional payment means such as all-purpose card payment are transplanted on the mobile devices such as smart mobile phone.The modes of payments based on mobile terminal devices such as smart mobile phones is called mobile payment, is the one in the application of NFC near-field communication.The module integration of NFC function/be embedded into mainstream development trend mobile terminal device becoming gradually current mobile payment technology will be possessed.
To possess the mobile phone of NFC function, when user needs to carry out payment transaction, the Transaction Information be stored in mobile phone/SIM card/SD card completes authentication and process of exchange by NFC module and card reader, and payment flow is simple, exchange hour is short, is very easy to user and businessman.
However, current also the failing of mobile payment obtains large-scale commercial applications utilization, and reason is that it exists multiple technology barrier, and one of them is exactly safety of payment sex chromosome mosaicism.Ordinary passive non-contact IC is stuck in when carrying out near field transaction and ensures that one of means of security control to swipe the card distance.Apply for the mobile payment based on smart mobile phone, whether this security means effectively can realize also there is technical matters.
Its non-active operation mode of common non-contact IC cacaine and applied environment feature, easily meet the communication distance that secure payment requires.For the mobile phone/SIM card/SD card possessing NFC function, be mostly active working method, applied environment is more complicated compared with passive contact-free IC-card, circuit board of mobile phone, card slot, battery, bonnet, and shell all can impact the work of NFC radio-frequency module.
In prior art, for SIM card, the SIM card of integrated NFC module is called that NFC blocks entirely.The equivalent inductance of the full card aerial coil of NFC and Q value are subject to the shell of different brands, model mobile phone, circuit board, battery, and the factor impacts such as card slot are larger.Through experiment, the NFC that different brands, model mobile phone insert same support mobile payment function blocks entirely, and on identical communication distance, NFC blocks received signal strength difference entirely more than 20dB.Count that NFC blocks a radio-frequency performance difference and working environment entirely, the change of temperature causes RF index to change again.This radio-frequency performance difference causes different brands, model mobile phone to use NFC entirely to block effective communication distance when communicating with card reader larger difference, and not only Secure Transaction distance can not be guaranteed, and handset compatibility is also poor.
Summary of the invention
For solving above-mentioned the problems of the prior art, the NFC that the object of this invention is to provide a kind of Non-contact radio-frequency communication band distance controlling blocks entirely.It effectively can solve the SIM cards of mobile phones/SD being integrated with NFC module and be stuck in when different brands, model mobile terminal device use and card reader effective communication distance changes excessive problem, using method is easy, improves the compatible rate of SIM card/SD card to different brands, model mobile phone/mobile device simultaneously.
To achieve the above object of the invention, technical scheme of the present invention realizes as follows:
A kind of NFC of Non-contact radio-frequency communication band distance controlling blocks entirely, and it comprises CPU smart card and NFC module.Its design feature is, described NFC module comprises NFC radio-frequency enabled module, tunable antenna and controlling functions module.Described controlling functions module control NFC radio-frequency enabled module and tunable antenna respectively, NFC radio-frequency enabled module and tunable antenna are interconnected.NFC radio-frequency enabled module, comprises the transmitter unit that the receiving sensitivity that connects successively adjustable receiving element, digital signal processing unit and emissive power are adjustable; NFC radio-frequency enabled module is for launching 13.56MHz radiofrequency signal and detecting tunable antenna two end signal strength.
Controlling functions module, comprises tuning controling unit, arithmetic element and dispensing unit, and tuning controling unit is connected respectively to arithmetic element and dispensing unit.Tuning controling unit is for performing antenna tuning flow process, and arithmetic element is for calculating the emissive power configuration data corresponding with tunable antenna configuration data and receiving sensitivity configuration data; Dispensing unit is for configuring tunable antenna and configuring radio-frequency enabled unit emissive power and receiving sensitivity.
Tunable antenna, comprises the aerial coil, resonant capacitance and the turnable resonator capacitor array that adopt parallel way to connect; For receive extraneous radio frequency signals and by emission of radio frequency signals to free space.
The present invention owing to have employed said structure, antenna tuning configuration and emissive power configuration data mathematical model, antenna tuning configuration data and receiving sensitivity configuration data mathematical model that NFC under full card apparatus current application and required distance is blocked entirely.Can make different brands, model mobile phone inserts after the present invention supports that the NFC of mobile payment function blocks entirely, when communicating with card reader, effective communication distance difference is little, and Secure Transaction distance can be guaranteed.Range calibration is omnidistance to be participated in without the need to external device access and user, and using method simplifies, and improves the compatible rate of NFC module/SIM card/SD card to different brands, model mobile phone/mobile device simultaneously.
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is the structural representation in the present invention;
Fig. 2 is the antenna tuning that entirely blocks of NFC of the present invention and range calibration process flow diagram.
Embodiment
Referring to Fig. 1, the NFC of Non-contact radio-frequency communication band distance controlling of the present invention blocks entirely, and it comprises CPU smart card 2 and NFC module 1.NFC module 1 comprises NFC radio-frequency enabled module 4, tunable antenna 3 and controlling functions module 5.Controlling functions module 5 respectively control NFC radio-frequency enabled module 4 and tunable antenna 3, NFC radio-frequency enabled module 4 and tunable antenna 3 is interconnected.
NFC radio-frequency enabled module 4, comprises the transmitter unit 4.1 that the receiving sensitivity that connects successively adjustable receiving element 4.3, digital signal processing unit 4.2 and emissive power are adjustable; NFC radio-frequency enabled module 4 is for launching 13.56MHz radiofrequency signal and detecting tunable antenna 3 liang of end signal strength;
Controlling functions module 5, comprises tuning controling unit 5.2, arithmetic element 5.3 and dispensing unit 5.1.Tuning controling unit 5.2 is connected respectively to arithmetic element 5.3 and dispensing unit 5.1; Tuning controling unit 5.2 is for performing antenna tuning flow process, and arithmetic element 5.3 is for calculating the emissive power configuration data corresponding with tunable antenna 3 configuration data and receiving sensitivity configuration data; Dispensing unit 5.1 is for configuring tunable antenna 3 and configuring radio-frequency enabled unit 4 emissive power and receiving sensitivity.
Tunable antenna 3, comprises the aerial coil 3.1, resonant capacitance 3.2 and the turnable resonator capacitor array 3.3 that adopt parallel way to connect; For receive extraneous radio frequency signals and by emission of radio frequency signals to free space.
Before NFC of the present invention is entirely stuck in and dispatches from the factory, chip manufacturer/card vendor need do following work:
A, communication distance requirement for application-specific, NFC is blocked entirely and inserts different brands, model mobile phone and carry out batch testing, obtain antenna tuning configuration and emissive power configuration data mathematical model, antenna tuning configuration data and receiving sensitivity configuration data mathematical model that NFC under current application and required distance blocks entirely.
B, above-mentioned mathematical model is implanted the full card initialization flow process of NFC, antenna tuning and range calibration flow process are implanted the full card initialization flow process of NFC.Implantation both can hardware customization realize, also can software write SOC (system on a chip) COS mode realize.
C, NFC entirely block dispatch from the factory before configure antenna, make antenna resonance under free space state.
User takes and entirely blocks through the NFC of above-mentioned process, and card is inserted mobile phone draw-in groove.NFC entirely blocks and automatically performs electrification reset initialization and antenna tuning and range calibration flow process.
Flow process referring to the full card antenna tuning of Fig. 2, NFC and range calibration is:
1. flow process starts;
2. first group of configuration data is got;
3. emitting radio frequency signal, detects tunable antenna 3 liang of end signal strength;
4. current signal strength P is compared
nwith preceding signal intensity P
n-1if, P
i<=P
i-1, do not record current antenna configuration data; If P
i>P
i-1, record current antenna configuration data;
If 5. do not travel through all antenna configurations, then measure one by one, find out in all antenna configurations one group that antenna ends signal intensity can be made maximum; If complete traversal, think antenna resonance under recorded configuration data;
6. emissive power configuration data and receiving sensitivity configuration data is calculated according to the configuration data found out;
7. video function modules 4 emissive power and receiving sensitivity index is configured;
8. termination process.
In Fig. 2, RFM represents radio-frequency module, and N is that tunable sky 3 configures total quantity, and TS is the configuration data retained, TS
nand TS
n-1represent a current and upper configuration data respectively;
P
nand P
n-1represent tunable antenna 3 liang of end signal strength corresponding under tunable antenna 3 current configuration data and under last configuration data respectively;
TP represents emissive power configuration data, and RS represents receiving sensitivity configuration data;
Tunable antenna 3 configuration data and emissive power configuration data mathematical model, represent with function TP=Fn1 (TS);
Tunable antenna 3 configuration data and receiving sensitivity configuration data mathematical model, represent with function RS=Fn2 (TS).
After the full card power-up initializing of NFC of the present invention, execution antenna tuning and range calibration flow process can complete the range calibration work entirely blocked NFC under application-specific, reach the object that radio frequency communication distance controls.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any those skilled in the art being familiar with this technology are in technical scope disclosed by the invention; obviously the conversion obtained or replacement, all should belong to protection scope of the present invention.
Claims (1)
1. the NFC of a Non-contact radio-frequency communication band distance controlling blocks entirely, it comprises CPU smart card (2) and NFC module (1), it is characterized in that, described NFC module (1) comprises NFC radio-frequency enabled module (4), tunable antenna (3) and controlling functions module (5); Described controlling functions module (5) is control NFC radio-frequency enabled module (4) and tunable antenna (3) respectively, and NFC radio-frequency enabled module (4) and tunable antenna (3) are interconnected;
NFC radio-frequency enabled module (4), comprises the transmitter unit (4.1) that the receiving sensitivity that connects successively adjustable receiving element (4.3), digital signal processing unit (4.2) and emissive power are adjustable; NFC radio-frequency enabled module (4) is for launching 13.56MHz radiofrequency signal and detecting tunable antenna (3) two end signal strength;
Controlling functions module (5), comprises tuning controling unit (5.2), arithmetic element (5.3) and dispensing unit (5.1), and tuning controling unit (5.2) is connected respectively to arithmetic element (5.3) and dispensing unit (5.1); Tuning controling unit (5.2) is for performing antenna tuning flow process, and arithmetic element (5.3) is for calculating the emissive power configuration data corresponding with tunable antenna (3) configuration data and receiving sensitivity configuration data; Dispensing unit (5.1) is for configuring tunable antenna (3) and configuring radio-frequency enabled unit (4) emissive power and receiving sensitivity;
Tunable antenna (3), comprises the aerial coil (3.1), resonant capacitance (3.2) and the turnable resonator capacitor array (3.3) that adopt parallel way to connect; For receive extraneous radio frequency signals and by emission of radio frequency signals to free space.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410021585.5A CN104794521B (en) | 2014-01-17 | 2014-01-17 | A kind of NFC of Non-contact radio-frequency communication band distance controlling blocks entirely |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410021585.5A CN104794521B (en) | 2014-01-17 | 2014-01-17 | A kind of NFC of Non-contact radio-frequency communication band distance controlling blocks entirely |
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| CN104794521A true CN104794521A (en) | 2015-07-22 |
| CN104794521B CN104794521B (en) | 2019-01-11 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105306089A (en) * | 2015-12-08 | 2016-02-03 | 上海新储集成电路有限公司 | Communication system and method integrating NFC and SIM |
| 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 |
| CN105656574A (en) * | 2016-02-03 | 2016-06-08 | 上海坤锐电子科技有限公司 | Detection device for sensitivity of NFC card reader |
| CN112152675A (en) * | 2020-09-28 | 2020-12-29 | 维沃移动通信有限公司 | NFC antenna resonant frequency adjusting circuit, electronic equipment and calibration method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103020675A (en) * | 2012-11-29 | 2013-04-03 | 中国电子科技集团公司第五十二研究所 | Ultrahigh-frequency RFID (radio frequency identification device) reading and writing module based on self-adaptive tuning technology of antenna |
| CN203054898U (en) * | 2013-01-30 | 2013-07-10 | 厦门盛华电子科技有限公司 | RF-SIM card controlling distance detection by employing magnetic field |
-
2014
- 2014-01-17 CN CN201410021585.5A patent/CN104794521B/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105306089A (en) * | 2015-12-08 | 2016-02-03 | 上海新储集成电路有限公司 | Communication system and method integrating NFC and SIM |
| 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 |
| CN105656574A (en) * | 2016-02-03 | 2016-06-08 | 上海坤锐电子科技有限公司 | Detection device for sensitivity of NFC card reader |
| CN105656574B (en) * | 2016-02-03 | 2019-03-22 | 上海坤锐电子科技有限公司 | The detection device of NFC reader sensitivity |
| CN112152675A (en) * | 2020-09-28 | 2020-12-29 | 维沃移动通信有限公司 | NFC antenna resonant frequency adjusting circuit, electronic equipment and calibration method |
| CN112152675B (en) * | 2020-09-28 | 2021-10-22 | 维沃移动通信有限公司 | NFC antenna resonant frequency adjusting circuit, electronic equipment and calibration method |
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| Publication number | Publication date |
|---|---|
| CN104794521B (en) | 2019-01-11 |
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Address after: 100083 Beijing City, Haidian District Wudaokou Wangzhuang Road No. 1 Tongfang Technology Plaza D floor 18 West Applicant after: Beijing Tongfang Microelectronics Company Address before: 100083 Haidian District Tsinghua Tongfang Technology Plaza, block A, floor 29, Beijing Applicant before: Beijing Tongfang Microelectronics Company |
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Address after: 100083 18 floor, West Tower, block D, Tongfang science and Technology Plaza, 1 Wang Zhuang Road, Wudaokou, Haidian District, Beijing. Applicant after: Purple light co core Microelectronics Co., Ltd. Address before: 100083 18 floor, West Tower, block D, Tongfang science and Technology Plaza, 1 Wang Zhuang Road, Wudaokou, Haidian District, Beijing. Applicant before: Beijing Tongfang Microelectronics Company |
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