CN104794521B - A kind of NFC of Non-contact radio-frequency communication band distance controlling blocks entirely - Google Patents
A kind of NFC of Non-contact radio-frequency communication band distance controlling blocks entirely Download PDFInfo
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- CN104794521B CN104794521B CN201410021585.5A CN201410021585A CN104794521B CN 104794521 B CN104794521 B CN 104794521B CN 201410021585 A CN201410021585 A CN 201410021585A CN 104794521 B CN104794521 B CN 104794521B
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Abstract
A kind of NFC of Non-contact radio-frequency communication band distance controlling blocks entirely, is related to mobile payment technical field.The present invention includes CPU smart card and NFC module.It is structurally characterized in that NFC module includes NFC radio-frequency enabled module, tunable antenna and control function module.NFC radio-frequency enabled module includes the adjustable receiving unit of sequentially connected receiving sensitivity, digital signal processing unit and the adjustable transmitting unit of transmission power.Control function module includes tuning controling unit, arithmetic element and configuration unit.Tunable antenna includes aerial coil, resonant capacitance and the turnable resonator capacitor array using parallel way connection.The present invention can effectively solve the SIM cards of mobile phones/SD card for being integrated with NFC module when using on different brands, model mobile terminal device and card reader effective communication distance changes excessive problem, application method is easy, while improving SIM card/SD card to different brands, model mobile phone/mobile device compatibility rate.
Description
Technical field
The present invention relates to mobile payment technical fields, are based particularly on SIM card/SD card Non-contact radio-frequency communication band distance
The NFC of control blocks entirely.
Background technique
As smart phone is in the promotion of mobile device occupation rate in the market, the related wireless application based on smart phone is obtained
To very big promotion and development.Business model based on wireless application also shows the fast-developing impetus, therefore, it is necessary to by bank
Card payment, a variety of conventional payment means such as all-purpose card payment are transplanted in the mobile devices such as smart phone.Based on smart phone etc.
The means of payment of mobile terminal device is known as mobile payment, is one of NFC near-field communication application.It will be provided with NFC function
Module integrate/is embedded into the mainstream development trend that current mobile payment technology is increasingly becoming on mobile terminal device.
By taking the mobile phone for having NFC function as an example, when user needs to carry out payment transaction, it is stored in mobile phone/SIM card/SD
Transaction Information in card completes authentication and process of exchange by NFC module and card reader, and payment flow is simple, exchange hour
It is short, greatly facilitate user and businessman.
Nevertheless, mobile payment currently also fails to obtain large-scale commercial applications utilization, reason is it, and there are multiple technologies
Obstacle, one of them is exactly payment safety problem.Ordinary passive non-contact IC, which is stuck in, guarantees safety when carrying out near field transaction
The means of property first is that pilot brush card distance.For the mobile payment application based on smart phone, this security means is
It is no effectively to realize that there is also technical problems.
Common its non-active operation mode of non-contact IC cacaine and application environment feature readily satisfy secure payment requirement
Communication distance.It is mostly active operation mode for the mobile phone/SIM card/SD card for having NFC function, non-is connect with passive
Touch IC card is increasingly complex compared to application environment, and circuit board of mobile phone, card slot, battery, rear cover, shell can be to NFC radio frequency mould
Block work impacts.
In the prior art, by taking SIM card as an example, the SIM card of integrated NFC module is known as NFC and blocks entirely.The full card aerial coil of NFC
Equivalent inductance and Q value by different brands, the shell of model mobile phone, circuit board, battery, the factors such as card slot are affected.Through
Experiment, different brands, model mobile phone are inserted into the same NFC for supporting mobile payment function and block entirely, on identical communication distance,
It is more than 20dB that NFC blocks received signal strength difference entirely.Be included in again NFC block entirely between radio-frequency performance difference and working environment, temperature
The variation of degree causes RF index to change.This radio-frequency performance difference causes different brands, model mobile phone to be blocked entirely and read using NFC
Effective communication distance has larger difference when card device communicates, and not only Secure Transaction distance cannot be guaranteed, and handset compatibility is also poor.
Summary of the invention
To solve above-mentioned the problems of the prior art, the object of the present invention is to provide a kind of Non-contact radio-frequency communication band distances
The NFC of control blocks entirely.It can effectively solve the SIM cards of mobile phones/SD card for being integrated with NFC module in different brands, model mobile end
Change excessive problem when using in end equipment with card reader effective communication distance, application method is easy, while improving SIM
Card/SD card is to different brands, model mobile phone/mobile device compatibility rate.
To achieve the above object of the invention, technical solution of the present invention is realized as follows:
A kind of NFC of Non-contact radio-frequency communication band distance controlling blocks entirely, it includes CPU smart card and NFC module.Its structure
Feature is that the NFC module includes NFC radio-frequency enabled module, tunable antenna and control function module.The control function mould
Block controls NFC radio-frequency enabled module and tunable antenna respectively, and NFC radio-frequency enabled module and tunable antenna are connected with each other.
NFC radio-frequency enabled module, including the adjustable receiving unit of sequentially connected receiving sensitivity, digital signal processing unit and transmitting
The transmitting unit of power adjustable；NFC radio-frequency enabled module is for emitting 13.56MHz radiofrequency signal and detecting tunable antenna two
End signal strength.
Control function module, including tuning controling unit, arithmetic element and configuration unit, tuning controling unit are separately connected
To arithmetic element and configuration unit.Tuning controling unit for executing antenna tuning process, arithmetic element for calculate with it is adjustable
The corresponding transmission power configuration data of humorous configuration data and receiving sensitivity configuration data；Configuration unit is adjustable for configuring
Humorous antenna and configuration radio-frequency enabled unit transmission power and receiving sensitivity.
Tunable antenna, including aerial coil, resonant capacitance and the turnable resonator capacitor array using parallel way connection；
For receiving extraneous radio frequency signals and by emission of radio frequency signals to free space.
The present invention makes the day that NFC blocks entirely under full card apparatus current application and required distance due to the above structure,
Line tuning configuration and transmission power configuration data mathematical model, antenna tuning configuration data and receiving sensitivity configuration data mathematics
Model.It is logical with card reader after capable of making different brands, the model mobile phone insertion present invention that the NFC of mobile payment function be supported to block entirely
Effective communication distance difference is little when letter, and Secure Transaction distance can be guaranteed.Range calibration whole process connects without external device
Enter and participated in user, application method simplifies, while improving NFC module/SIM card/SD card to different brands, model mobile phone/shifting
The compatibility rate of dynamic equipment.
Present invention will be further explained below with reference to the attached drawings and specific embodiments.
Detailed description of the invention
Fig. 1 is the structural schematic diagram in the present invention；
Fig. 2 is the antenna tuning and range calibration flow chart that NFC of the present invention blocks entirely.
Specific embodiment
Referring to Fig. 1, the NFC of Non-contact radio-frequency communication band distance controlling of the present invention blocks entirely, it includes CPU smart card 2 and NFC
Module 1.NFC module 1 includes NFC radio-frequency enabled module 4, tunable antenna 3 and control function module 5.Control function module 5 is divided
Not Kong Zhi NFC radio-frequency enabled module 4 and tunable antenna 3, NFC radio-frequency enabled module 4 and tunable antenna 3 are connected with each other.
At NFC radio-frequency enabled module 4, including the adjustable receiving unit 4.3 of sequentially connected receiving sensitivity, digital signal
Manage unit 4.2 and the adjustable transmitting unit 4.1 of transmission power；NFC radio-frequency enabled module 4 is for emitting 13.56MHz radiofrequency signal
And detect 3 liang of end signal strengths of tunable antenna；
Control function module 5, including tuning controling unit 5.2, arithmetic element 5.3 and configuration unit 5.1.Tuning control is single
Member 5.2 is connected respectively to arithmetic element 5.3 and configuration unit 5.1；Tuning controling unit 5.2 is used to execute antenna tuning process,
Arithmetic element 5.3 is matched for calculating transmission power configuration data corresponding with 3 configuration data of tunable antenna and receiving sensitivity
Set data；Configuration unit 5.1 is for configuring tunable antenna 3 and configuration 4 transmission power of radio-frequency enabled unit and receiving sensitivity.
Tunable antenna 3, including aerial coil 3.1, resonant capacitance 3.2 and the turnable resonator electricity using parallel way connection
Hold array 3.3；For receiving extraneous radio frequency signals and by emission of radio frequency signals to free space.
Before NFC of the present invention is stuck in factory entirely, chip manufacturer/card vendor need to do following work:
A, for the communication distance requirement of specific application, the full card insertion of NFC is entered into different brands, model mobile phone carries out batch survey
Examination obtains NFC blocks entirely under current application and required distance antenna tuning configuration and transmission power configuration data mathematical model, day
Line tunes configuration data and receiving sensitivity configuration data mathematical model.
B, above-mentioned mathematical model is implanted into the full card initialization process of NFC, antenna tuning and range calibration process is implanted into NFC
Full card initialization process.Implantation can both be customized with hardware and be realized, can also be real in such a way that system on chip COS is written in software
It is existing.
C, NFC configures antenna before blocking factory entirely, makes antenna resonance under free space state.
User takes the NFC through above-mentioned processing and blocks entirely, inserts cards into mobile phone card slot.NFC blocks automatic execution electrification reset entirely
Initialization and antenna tuning and range calibration process.
Referring to Fig. 2, the process of NFC full card antenna tuning and range calibration are as follows:
1. process starts；
2. taking first group of configuration data；
3. emitting radiofrequency signal, 3 liang of end signal strengths of tunable antenna are detected；
4. comparing current signal strength PnWith preceding signal intensity Pn-1If Pi<=Pi-1, current antenna configuration number is not recorded
According to；If Pi>Pi-1, record current antenna configuration data；
5. measuring one by one if not traversing all antenna configurations, antenna ends signal can be made by finding out in all antenna configurations
One group of maximum intensity；If having completed to traverse, it is believed that the antenna resonance under the configuration data recorded；
6. calculating transmission power configuration data and receiving sensitivity configuration data according to the configuration data found out；
7. configuring 4 transmission power of video function modules and receiving sensitivity index；
8. termination process.
In Fig. 2, RFM indicates that radio-frequency module, N are that tunable day 3 configures total quantity, and TS is the configuration data retained,
TSnAnd TSn-1Respectively indicate a current and upper configuration data；
PnAnd Pn-1Respectively indicate under 3 current configuration data of tunable antenna and previous configuration data under it is corresponding tunable
3 liang of end signal strengths of antenna；
TP indicates transmission power configuration data, and RS indicates receiving sensitivity configuration data；
3 configuration data of tunable antenna and transmission power configuration data mathematical model, are indicated with function TP=Fn1 (TS)；
3 configuration data of tunable antenna and receiving sensitivity configuration data mathematical model, are indicated with function RS=Fn2 (TS).
After NFC of the present invention blocks power-up initializing entirely, execution antenna tuning can be completed with range calibration process is answered specific
The range calibration work blocked entirely with lower NFC, achievees the purpose that radio frequency communication distance controls.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those skilled in the art of this technology are familiar in technical scope disclosed by the invention, it is clear that obtained transformation is replaced
It changes, all should belong to protection scope of the present invention.
Claims (1)
1. a kind of NFC of Non-contact radio-frequency communication band distance controlling blocks entirely, it includes CPU smart card (2) and NFC module (1),
It is characterized in that, the NFC module (1) includes NFC radio-frequency enabled module (4), tunable antenna (3) and control function module (5)；
The control function module (5) controls NFC radio-frequency enabled module (4) and tunable antenna (3), NFC radio-frequency enabled module respectively
(4) it is connected with each other with tunable antenna (3)；
At NFC radio-frequency enabled module (4), including the adjustable receiving unit of sequentially connected receiving sensitivity (4.3), digital signal
Manage unit (4.2) and the adjustable transmitting unit of transmission power (4.1)；NFC radio-frequency enabled module (4) is penetrated for emitting 13.56MHz
Frequency signal simultaneously detects (3) two end signal strength of tunable antenna；
Control function module (5), including tuning controling unit (5.2), arithmetic element (5.3) and configuration unit (5.1), tuning control
Unit (5.2) processed is connected respectively to arithmetic element (5.3) and configuration unit (5.1)；Tuning controling unit (5.2) is for executing day
Line tunes process, and arithmetic element (5.3) is for calculating transmission power configuration data corresponding with tunable antenna (3) configuration data
With receiving sensitivity configuration data；Configuration unit (5.1) is for configuring tunable antenna (3) and configuration radio-frequency enabled unit (4)
Transmission power and receiving sensitivity；
Tunable antenna (3), including aerial coil (3.1), resonant capacitance (3.2) and the turnable resonator using parallel way connection
Capacitor array (3.3)；For receiving 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 |
|---|---|---|---|
| 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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| Publication Number | Publication Date |
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| CN104794521A CN104794521A (en) | 2015-07-22 |
| CN104794521B true CN104794521B (en) | 2019-01-11 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105306089B (en) * | 2015-12-08 | 2019-02-12 | 上海新储集成电路有限公司 | Integrate the communication system and method for NFC and SIM |
| CN105406888B (en) * | 2015-12-21 | 2019-02-26 | 捷德（中国）信息科技有限公司 | A method of adjustment antenna for mobile phone working frequency |
| 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 |
| 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 |
Citations (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 |
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2014
- 2014-01-17 CN CN201410021585.5A patent/CN104794521B/en active Active
Patent Citations (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 |
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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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