CN101561891A - Dual-interface SIM card and radio frequency identification system thereof - Google Patents
Dual-interface SIM card and radio frequency identification system thereof Download PDFInfo
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- CN101561891A CN101561891A CNA2009101353141A CN200910135314A CN101561891A CN 101561891 A CN101561891 A CN 101561891A CN A2009101353141 A CNA2009101353141 A CN A2009101353141A CN 200910135314 A CN200910135314 A CN 200910135314A CN 101561891 A CN101561891 A CN 101561891A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/0723—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10158—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves methods and means used by the interrogation device for reliably powering the wireless record carriers using an electromagnetic interrogation field
- G06K7/10178—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves methods and means used by the interrogation device for reliably powering the wireless record carriers using an electromagnetic interrogation field including auxiliary means for focusing, repeating or boosting the electromagnetic interrogation field
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Abstract
The invention discloses a dual-interface SIM card and a radio frequency identification system applying the same, wherein the radio frequency identification system at least comprises a reader and a signal enhancer. The signal enhancer is used for relaying and strengthening signals between the dual-interface SIM card and the reader, and the reader is used for sending command signals to the dual-interface SIM card and receiving response from the dual-interface SIM card by the signal enhancer. The dual-interface SIM card and the radio frequency identification system successfully apply mobile communication equipment to an RFID system, thereby realizing non-contact short-distance radio frequency identification with low cost.
Description
Technical field
The radio-frequency recognition system that the present invention relates to client identification module (Subscriber Identity Model is hereinafter to be referred as SIM) card, particularly double-interface SIM card and comprise this double-interface SIM card.
Background technology
Comprise contactless integrated-circuit card (Integrated Circuit Card, be called for short IC-card) at interior REID (Radio Frequency Identification, hereinafter to be referred as RFID) technology is through the development of more than ten years, go deep into each corner of the modern life, be widely used in fields such as public transport, gate inhibition, doit electronic payment.
REID is a kind of of automatic identification technology, and the composition of radio-frequency recognition system generally comprises two parts at least: electronic tag (Tag) and reader (Reader).Electronic tag is used to preserve the electronic data of agreement form, in actual applications, and can be with electronic tag attached to object surfaces to be identified; Reader is as readout device, the electronic data that can contactlessly read and discern in the electronic tag to be preserved, thus reach the purpose of automatic recognition object.Further, also can transmit the electronic data that is read and handle, to realize functions such as collection, teletransmission and management object identification information by computing machine and computer network.For most of rfid systems, can adopt a fixing frequency, and have a cover standard agreement to match with it.
In recent years, under demands such as track traffic, logistics management, article anti-counterfeit, identification promoted, the RFID continuous advancement in technology was used more and more universally, and market presses for all kinds of RFID electronic tags and identification equipment.And meanwhile, mobile communication terminal experiences more than 20 year developing rapidly, has almost become the portable device of consumer's staff indispensability, and popularity rate is very high, and integrated multi-purpose trend on portable terminal is arranged.Utilizing the mobile communications network of mobile phone itself such as GSM, CDMA etc. to pay is existing mature technology, but mobile phone and electronic tag are effectively combined, allowing mobile phone make things convenient for as mass transit card and using is the developing direction of present radio-frequency (RF) identification, also is the market that equipment supplier and mobile operator open up at present energetically.
Industry mainly contains the solution of two covers based on non-contact technology at present: Combi SIM card scheme and near-field communication (NFC) scheme.
The NFC scheme is a kind of new scheme that is proposed relevant radio-frequency (RF) identification in recent years by companies such as Nokia, Philips, basic way is to add the RFID module that is used to pay in newly-designed mobile phone, intercoms mutually with special communication protocol between RFID module and the mobile phone.This method can solve better utilizes mobile phone to carry out the problem of radio-frequency (RF) identification, but shortcoming is the user must remove to transform existing mobile phone, even buy a brand-new mobile phone, this can both receiving method not all user of present stage, and also is the very big wasting of resources for entire society.
Combi SIM card scheme claims the double-interface SIM card scheme again, refers to replace the inner SIM card of mobile phone with the Combi SIM card, increases the contactless IC card application interface on the SIM card function basis that keeps former contact interface.More typical way has two kinds: one, the noncontact antenna of contactless IC card is printed on the plastic sheeting, is labelled to the SIM card surface again; Two, the noncontact antenna of contactless IC card as one independently parts be attached in the mobile phone, antenna is guided to the front or the reverse side of mobile phone, antenna is connected on the still untapped interface of SIM card.But the shortcoming of these two kinds of schemes is: antenna is attached to the SIM card surface or is drawn out to mobile phone front or reverse side, is easy to cause a day thread breakage, damage in installation process, and causes the user to use inconvenience; Simultaneously, because the shielding action of battery of mobile phone and circuit board, double-interface SIM card can be received the signal of reader and reflect and give the signal of reader all very faint, if the signal that double-interface SIM card returns do not carry out power amplification and with reader that this double-interface SIM card matches on do not have Signal Booster, the quality of communicating by letter between double-interface SIM card and the reader can non-constant, and reader almost can not receive replying that double-interface SIM card returns.
With reference to figure 1, be illustrated as the typical double-interface IC card chip structural drawing of releasing by Gemplus company, contact part communication standard meets the ISO/IEC7816 standard, and contactless part communication standard meets ISO/IEC 14443 TYPEA/TYPEB standards.This typical double-interface IC card chip is mainly by radio frequency (RF, Radio Frequency) interface 100, central processing unit 101 (CPU, Central ProcessingUnit), interrupt handler 102, randomizer 103, ROM (read-only memory) 104 (ROM), EEPROM (programmable electric erasable read only storer) 105, external RAM (random access memory) 106, Cyclic Redundancy Check module 107, clock module 108, ISO/IEC7816 module 109 are formed.This double-interface IC card chip can communicate with the 13.56MHz reader.Wherein, RF interface 100 is communication interfaces of double-interface IC card chip and reader; CPU101 is the central processing unit of double-interface IC card, is used to handle communicating by letter and transaction of mobile phone and reader; Interrupt handler 102 is mainly used in the interruption of handling various peripheral hardwares; ROM104 is used to store inner firmware program; EEPROM105 and external RAM 106 are used to store the data of double-interface IC card and intermediate variable etc.; CRC module 107 is used to produce cyclic redundancy check (CRC) code, guarantees the integrality of data in the communication process; Clock module 108 is used for clock internal to be handled; ISO/IEC7816 module 109 is communication interfaces of mobile phone and double-interface IC card chip, and the passage of power supply is provided to IC-card as mobile phone.
With reference to figure 2, RF interface 100 mainly is made up of contactless antenna 201, demodulator circuit 202, digital quantization circuit 203 and modulation circuit 204.
When the double-interface IC card received signal, the command signal that is sent to double-interface IC card by the 13.56MHz reader at first receives by the contactless antenna 201 of 13.56MHz; Because it is the modulation signal of 100%ASK that reader is dealt into the signal of double-interface IC card, next, double-interface IC card adopts the mode of diode peak envelop detection that this modulation signal is carried out demodulation by demodulator circuit 202; Then, the signal with detection output carries out quantification treatment through digital quantization circuit 203, the required baseband signal of acquisition logical circuit; Afterwards, the CPU in this baseband signal input double-interface IC card is handled.
When double-interface IC card when reader sends answer signal, at first finish coding by CPU, then deliver to modulation circuit 204 and modulate, finish the reflection of replying of signal by changing pull-up resistor in the modulation circuit 204.
Because the shielding action of battery of mobile phone and circuit board, if directly replacing existing common SIM card with existing double-interface IC card is applied in the mobile phone environment, this double-interface IC card can't be received the command signal that reader sends reliably, the answer signal that the while double-interface IC card sends will significantly be decayed behind the mobile phone environment, and so little answer signal can't be received and distinguish by reader.In light of this situation, existing double-interface IC card is directly put into mobile phone inside,, can't realize the requirement of needed radio-frequency recognition system to replace existing common SIM card.
In addition, be subjected to the Japan and the influence of Korea S's mobile-phone payment, small amount payment is that the field that enters is expected always by operator.Since can be extraordinary for payment and on-site payment in real time provide solution, contactless close distance radio frequency identification has very wide application prospect, and will bring unprecedented opportunities for the mobile payment industry of present slower development.And will be the new developing direction in following 10 years in conjunction with a tractor serves several purposes of portable terminal and RFID technology or one card for multiple uses.Particularly in the 3G epoch, the ubiquitous rfid interrogator with wireless connections function and the RFID of contactless application will be the most important things of development.
At present mainly comprise such process by the applied E-Payment of the RFID of contactless application: generally there is a stored value card electronic tag inside, the holder deposits certain amount of money in advance in electronic tag, directly deduct dealing money during transaction from account of stored value.But at present, the electronic tag of simple function exists some shortcomings, such as: for electronic tag is supplemented with money, must be to special voucher center; Relatively the transaction of wholesale has no idea to be provided with password; And RFID payment and mobile payment can't be combined etc.
Digital modulation technique is extensively adopted in the RFID field, as ASK, FSK and PSK modulation.The amplitude of amplitude keying (Amplitude Shift Keying is called for short ASK) i.e. by carrier wave is subjected to the modulation of numerical data and gets different values, for example corresponding Binary Zero, and carrier amplitude is 0; Corresponding binary one, carrier amplitude is 1.The amplitude modulation technology implements simply, but is subjected to the influence of change in gain easily.The frequency that frequency shift keying (Frequency Shift Keying is called for short FSK) is promptly pressed value (as the 0 or 1) modulated carrier of numerical data.For example the carrier frequency of corresponding Binary Zero is F1, and the carrier frequency of corresponding binary one is F2.This technology good in anti-interference performance, but occupied bandwidth is bigger.Phase-shift keying (PSK) (Phase ShiftKeying is called for short PSK) is promptly pressed the value modulated carrier phase place of numerical data.For example represent 1, represent 0 with 0 phase shift with 180 phase shifts.This modulation technique interference free performance is best, and the variation of phase place also can be used as the clock that timing information comes control synchro and receiver, and transfer rate is played the effect that doubles.These several modulation systems all are existing ripe modulation techniques, are widely used in each communication system.
Summary of the invention
Technical matters to be solved by this invention provides a kind of double-interface SIM card and radio-frequency recognition system thereof, under the situation of not transforming existing RFID reader and mobile phone, has realized the contactless close distance radio frequency identification of mobile phone.
For solving the problems of the technologies described above, the invention provides a kind of double-interface SIM card, comprise: card base, contactless antenna and chip, wherein, described chip and described contactless antenna are embedded in described Ka Jinei, and described chip is connected with described contactless antenna by the contact card hard contact; Described contactless antenna is used to receive the signal that comes from the outside and transfers to described chip, and sends the signal from described chip; Described chip is used for carrying out demodulation process again after the signal that described contactless antenna received amplifies, and is sent to described contactless antenna after modulation signal amplified.
Optionally, described chip comprises the RF interface unit at least, and described RF interface unit comprises reception amplifying unit, demodulating unit, modulating unit and transmitted power amplifying unit at least, wherein, described reception amplifying unit is used for and will amplifies from signal that described contactless antenna obtained and transfer to described demodulating unit; Described demodulating unit is used for the signal after amplifying through described reception amplifying circuit is carried out demodulation; Described modulating unit is used for modulating to sent signal; Described transmitting power amplifying circuit is used for being sent to described contactless antenna after amplifying through the signal after the described modulating unit modulation.
Optionally, described reception amplifying unit comprises at least: controllable gain amplifier is used for determining corresponding gain according to control signal, and with this gain the ac input signal that is received is amplified; Level detection unit is used for the alternation output signal of described controllable gain amplifier output is transformed to direct current signal; Comparer, the direct current signal and the reference signal that are used for being obtained compare, and obtain comparative result; Control signal generating unit is used for according to described comparative result, produces the control signal of the described controllable gain amplifier of control.
Optionally, described reception amplifying unit also comprises low-pass filter, be used for being filtered by the direct current signal that described level detection unit obtained, and the direct current signal after will filtering exports described comparer to.
Optionally, described transmitted power amplifying unit comprises C class or D class power amplifier.
Optionally, the plane at described contactless antenna place is parallel in twos with the plane of described chip and described card base respectively.
A kind of radio-frequency recognition system of using above-mentioned double-interface SIM card at least also comprises: reader and Signal Booster, and wherein, described Signal Booster is used for doing the relaying and the enhancing of signal between described double-interface SIM card and described reader; Described reader is used for to described double-interface SIM card transmission command signal and by the response of described Signal Booster reception from described double-interface SIM card.
Optionally, described Signal Booster is made signal between described double-interface SIM card and described reader relaying and enhancing are meant, described Signal Booster receives the answer signal that described double-interface SIM card returns described reader, after it is strengthened the answer signal that strengthens is back to described reader.
Optionally, described Signal Booster returns the answer signal that strengthens to described reader with the frequency agreement consistent with described reader.
Optionally, described frequency agreement is ISO/IEC 14443 communication standards or ISO/IEC 15693 communication standards or ISO11784/ISO11785 communication standard.
Optionally, described Signal Booster is attached on the load bearing equipment of described reader or described double-interface SIM card.
Optionally, described Signal Booster is attached on the load bearing equipment of described reader or described double-interface SIM card and is meant that described Signal Booster sticks on described reader or the described load bearing equipment.
Optionally, the load bearing equipment of described double-interface SIM card is a mobile communication equipment, and described mobile communication equipment provides reset signal and clock signal to described double-interface SIM card, and carries out data communication with described double-interface SIM card.
Optionally, described mobile communication equipment comprises the mobile phone that adopts GSM or CDMA or 3G or 4G communication network.
Optionally, described Signal Booster comprises: receiving antenna is used to receive the answer signal that is sent by described double-interface SIM card; The Signal Booster chip is used to strengthen the answer signal that is received; Transmitting antenna is used for sending the answer signal that strengthens and obtaining the carrier energy that described reader sends to described reader.
Optionally, described Signal Booster chip comprises: receiving element, transmitting element and power supply unit; Wherein, described receiving element is used to receive the answer signal that described double-interface SIM card sends to described reader, and it is carried out demodulation and amplification; Described transmitting element is used for the answer signal after the described amplification is modulated and sent; Described power supply unit is used to provide the working power of described Signal Booster chip.
Optionally, the signal that described double-interface SIM card is replied to described reader is sent to described Signal Booster with ASK or FSK or PSK modulation system, and corresponding carrier frequency is respectively 6.78MHz or 13.56MHz or 27.12MHz.
Optionally, described mobile communication equipment provides reset signal and clock signal to described double-interface SIM card, and carries out data communication with described double-interface SIM card.
Optionally, described radio-frequency recognition system also comprises: the back-office support that provides RFID exchange to need is provided background processing system; And communication interface, be used to realize communicating to connect of background processing system and reader.
Optionally, described communication interface comprises the communication interface that adopts RS232 or Ethernet.
Compared with prior art, above-mentioned double-interface SIM card has the following advantages: the reception amplifying unit by chip is amplified the command signal that is obtained, and has reduced the decay that the command signal that received causes owing to the shielding of battery of mobile phone and circuit board effectively; And sent again after modulation signal amplifies by the transmitted power amplifying unit of chip, improved the problem that signal to be sent is decayed owing to the shielding of battery of mobile phone and circuit board.
In addition, above-mentioned radio-frequency recognition system is by the Signal Booster chip, the answer signal that double-interface SIM card sent is inputed to described reader after amplifying again, realized the enhancing of signal, solved effectively since the transmission signal of double-interface SIM card affected by environment after significantly decay, thereby the problem that can't communicate with reader; And, above-mentioned radio-frequency recognition system is by sticking on Signal Booster on reader or the mobile communication equipment, need not the mobile communication equipment of reader and outfit double-interface SIM card is carried out the transformation of self structure, expanded the range of application of system, the fund that reduces system research and development and time effectively and dropped into.
Description of drawings
Fig. 1 is the structural representation of typical double-interface IC card chip in the prior art;
Fig. 2 is the structural representation of the RF interface unit of typical double-interface IC card chip in the prior art;
Fig. 3 is the structural representation of double-interface SIM card embodiment of the present invention;
Fig. 4 is the structural representation of RF interface unit in the double-interface SIM card embodiment of the present invention;
Fig. 5 is the structural representation that receives the amplifying unit embodiment among Fig. 4;
Fig. 6 is the circuit diagram that sends the amplifying unit embodiment among Fig. 4;
Fig. 7 is the structural representation that the present invention uses the radio-frequency recognition system embodiment of described double-interface SIM card;
Fig. 8 is in the radio-frequency recognition system specific embodiment of the present invention, the schematic flow sheet of this radio-frequency recognition system work;
Fig. 9 is the structural representation of Signal Booster embodiment among Fig. 7;
Figure 10 is the structural representation of Signal Booster chip embodiment among Fig. 9;
Figure 11 is along the diagrammatic cross-section of A-A1 direction among Fig. 3.
Embodiment
With reference to figure 3, embodiment of the present invention provides a kind of double-interface SIM card, comprising: SIM card base 310, contactless antenna 320 and chip 330; Wherein, described chip 330 and described contactless antenna 320 are embedded in the described card base 310, and described chip 330 is connected with described contactless antenna 330 by the contact card hard contact.
Specifically, described chip 330 can comprise RF interface unit, central processing unit, interrupt handler, randomizer, ROM (read-only memory), EEPROM, external RAM, cyclic redundancy check (CRC) module, clock unit and ISO/IEC7816 unit.
Specifically, with reference to figure 4, the RF interface unit of described chip 330 can comprise: receive amplifying unit 401, be used for and will amplify from the signal that described contactless antenna obtained and transfer to described demodulating unit; Demodulating unit 402 is used for the signal after amplifying through described reception amplifying circuit is carried out demodulation; Digital quantization unit 403, being used for the conversion of signals after demodulating unit 402 demodulation is digital signal; Modulating unit 404 is used for modulating to sent signal; And transmitted power amplifying unit 405, be used for after amplifying, being sent to described contactless antenna through the signal after described modulating unit 404 modulation.。In addition, described RF interface unit also can comprise: receive digital circuit interface 406, be used for the digital signal of digital quantization unit 403 outputs is decoded according to the employing agreement, and be sent to the central processing unit of described chip 330; Send digital circuit interface 407, be used to receive the digital signal that the central processing unit by described chip 330 sends, and this digital signal is carried out numerical coding, and the signal of will encoding is afterwards delivered to modulating unit 404 according to the employing agreement.
Wherein, when double-interface SIM card by described contactless antenna during from extraneous received signal, after outer signals transfers to the RF interface unit of described chip by described contactless antenna, at first by receiving amplifying unit 401 and amplifying, amplify the result by 402 pairs of demodulating units then and carry out demodulation, after demodulation result carried out quantification treatment through digital quantization unit 403, export central processing unit to it is handled by receiving digital circuit interface 406; When double-interface SIM card passes through described contactless antenna when the external world sends signal, signal to be sent at first transfers to modulating unit 404 by transmission digital circuit interface 407 and modulates, and then by transmitted power amplifying unit 405 modulation result is amplified the back and sends.
Wherein, described demodulating unit 402 can adopt but be not limited to the existing demodulator circuit of realizing coherent demodulation method or irrelevant demodulation method.For example, for non-coherent demodulation method, can adopt non-coherent demodulation methods such as the demodulation of diode peak envelope, average envelope demodulation.Prior art can realize that the related circuit of relevant or irrelevant demodulation method all can be used as demodulating unit 402 herein.
Described modulating unit 404 can adopt but be not limited to have now the modulation circuit of realizing ASK or FSK or PSK.And because modulating unit 404 adopts digital modulation techniques, for example ASK or PSK or FSK are so modulating unit 404 can directly receive and send digital signal that digital circuit interface 24 sends and it is modulated.
When described double-interface SIM card was positioned in the mobile phone, the selection that receives amplifying unit 401 was subjected to the influence of mobile phone environment and demodulating unit 402.On the one hand, because the double-interface SIM that comprises described chip 330 is stuck in the difference of installation site, mounting means and mechanical metal environment etc. in the various mobile phones on every side, the extraneous attenuation degree difference that passes to the signal of this double-interface SIM card by battery of mobile phone, circuit board etc.; On the other hand, receive amplifying signal that amplifying unit 401 exported and need be output to demodulating unit 402 and carry out demodulation,, receive amplifying unit 401 stable as far as possible amplifying signal need be provided therefore for different mobile phone environments.
Based on above-mentioned consideration, described reception amplifying unit 401 can adopt automatic gain control circuit (AGC).In a kind of specific embodiment, with reference to figure 5, described reception amplifying unit 401 comprises controllable gain amplifier 501, is used for determining corresponding gain according to the control signal that control signal generating unit 505 produces, and with this gain the ac input signal that is received is amplified; Level detection unit 502 is used for the AC signal of described controllable gain amplifier 201 outputs is converted to direct current signal; Comparer 504, the direct current signal and the reference signal that are used for being obtained compare, and obtain comparative result; Control signal generating unit 505 is used for according to described comparative result, produces the control signal of control controllable gain amplifier 501.In addition, described reception amplifying unit 401 also can comprise: low-pass filter 503 be used for the direct current signal that level detection unit 502 is obtained is filtered, and the direct current signal after will filtering transfers to comparer 504.
Specifically, when input signal Vi increases, and amplified signal Vo produces control signal Vc when increasing, and the gain of described controllable gain amplifier 501 is reduced; When the Vi minimizing reduces Vo, produce control signal Vc, the gain of described controllable gain amplifier 501 is increased.Promptly by above-mentioned control action, no matter Vi increases or reduces, output signal Vo can realize the value that keeps almost constant, or only in more among a small circle, change, even thereby realize that the input end of demodulating unit 402 can obtain constant amplitude or have the stable signal of less variation range under the situation that the input signal amplitude that SIM card obtained alters a great deal.
Wherein, described direct current signal and reference signal can be DC voltage.Described control signal can be control voltage.Described controllable gain amplifier 501 can adopt differential amplifier gain controller circuit or voltage-controlled attenuator gain control circuit.
Described transmitted power amplifying unit 405 can adopt but be not limited to and realize with C class or D class power amplifier.
With reference to figure 6, in a kind of specific embodiment, described transmitted power amplifying unit 405 can be a kind of high efficiency resonance power amplifier circuit, comprise: first to fourth phase inverter 601～604, the one PNP pipe Q3, the 2nd PNP manage Q5, and a NPN pipe Q4, the 2nd NPN manage Q6, first to the 3rd capacitor C 3～C5, first resistance R 11, second resistance R, 12, the first antenna load end ANT1, the second antenna load end ANT2.
Wherein, the input end of first phase inverter 601 receives the first modulated control signal RFTXD1, and output terminal links to each other with the base stage of the 2nd NPN pipe Q6; The input end of second phase inverter 602 receives the second modulated control signal RFTXD2, and output terminal links to each other with the base stage of the 2nd PNP pipe Q5; The input end of the 3rd phase inverter 603 receives the 3rd modulated control signal RFTXD3, and output terminal links to each other with the base stage of PNP pipe Q3; The input end of the 4th phase inverter 604 receives the 4th modulated control signal RFTXD4, and output terminal links to each other with the base stage of NPN pipe Q4.
The grounded collector of the 2nd PNP pipe Q5, emitter-base bandgap grading links to each other with the emitter-base bandgap grading of the 2nd NPN pipe Q6; The collector of the 2nd NPN pipe Q6 links to each other with VCC via first resistance R 11; The grounded collector of the one PNP pipe Q3, emitter-base bandgap grading links to each other with the emitter-base bandgap grading of NPN pipe Q4; The collector of the one NPN pipe Q4 links to each other with VCC via second resistance R 12.
First end of first capacitor C 3 links to each other with the emitter-base bandgap grading of the 2nd PNP pipe Q5 and the emitter-base bandgap grading of the 2nd NPN pipe Q6; First end of second capacitor C 4 links to each other with the emitter-base bandgap grading of PNP pipe Q3 and the emitter-base bandgap grading of NPN pipe Q4; The two ends of the 3rd capacitor C 5 link to each other with second end of first capacitor C 3 and second capacitor C 4 respectively; The two ends of the 3rd capacitor C 5 link to each other with the first antenna load end ANT1, the second antenna load end ANT2 respectively.
In practical work process, switch control by RFTXD1, RFTXD2, RFTXD3, RFTXD4 modulated control signal, make NPN manage Q5, Q6, and PNP pipe Q3, Q4 replace opening/closing, thereby when amplifying, make the antenna load end send the radiofrequency signal that meets frequency requirement for modulation signal; And RFTXD1, RFTXD2, RFTXD3, RFTXD4 modulated control signal can be produced by modulating unit 404, wherein, RFTXD1/RFTXD2 is that the just in time opposite signal of phase place is right with RFTXD3/RFTXD4, phase place basically identical between RFTXD1 and the RFTXD2, phase place basically identical between RFTXD3 and the RFTXD4.
Figure 11 is the tangent plane synoptic diagram of this double-interface SIM card, and wherein, the plane at described contactless antenna 320 places can be parallel in twos with the plane of described chip 330 and described card base 310 respectively.In other embodiment, the plane at contactless antenna 320 places can be not yet with the plane parallel of described chip 330 or not with the plane parallel of described card base 310.
Above-mentioned double-interface SIM card can be positioned in the mobile communication equipment, and contact card hard contact and described mobile communication equipment (for example mobile phone etc.) by chip communicate.
With reference to figure 3, the contact card hard contact of the embedded chip 330 of double-interface SIM card can comprise specifically: first day wire pin 341 and second day wire pin 342 are used for being connected with described contactless antenna 330; Power pins 343 and grounding pin 344 are respectively applied for power supply, ground wire and are connected, and the supply voltage value and the ground voltage value of described double-interface SIM card operate as normal is provided; Reset pin 345 is used to receive the signal that described double-interface SIM card is resetted; Clock pin 346 is used for the receive clock signal; Input and output pin 347 is used for transmission of data signals.The contact card hard contact of the embedded chip 330 of double-interface SIM card also can comprise standby pin, does not generally use when operate as normal.In addition, the embedded chip 330 of double-interface SIM card also can comprise and is used for linkage unit that above-mentioned each pin is connected with the corresponding units of described chip 330; Specifically, with reference to Figure 11, this linkage unit can be some gold threads 351.
In a kind of specific embodiment, when double-interface SIM card is positioned in the mobile communication equipment, can obtain the power supply of described double-interface SIM card from described mobile communication equipment by the gold thread of power pins 343 and grounding pin 344 and correspondence; Described mobile communication equipment provides reset signal for described double-interface SIM card by reset pin 345, and the work clock of described double-interface SIM card is provided by clock pin 346; Transmit the data of serial communications between described double-interface SIM card and the described mobile communication equipment by input and output pin 347; By described reset pin 345, clock pin 346 and communicating by letter that input and output pin 347 is realized, can follow communication protocol ISO/IEC7816 standard between described double-interface SIM card and the described mobile communication equipment.
In communication process, the agreement of communication meets the ISO/IEC7816 standard between the mobile communication equipment 9 at this double-interface SIM card 10 and its place; When described double-interface SIM card was used for the RFID field, contactless part communication met ISO/IEC 14443 standards, ISO/IEC 15693 standards or ISO11784/ISO11785 standard.
Embodiment of the present invention also provides a kind of radio-frequency recognition system of using above-mentioned double-interface SIM card, with reference to figure 7, comprising: the mobile communication equipment 9, reader 1, background processing system 3 and the communication interface 4 that are equipped with above-mentioned double-interface SIM card 10; Wherein, reader 1 or mobile communication equipment 9 also can comprise Signal Booster 2.
Double-interface SIM card 10 is installed on the described mobile communication equipment 9, is used to receive command signal and is responded; Signal Booster 2 sticks on the reader 1 or on the mobile communication equipment 9, is used for doing the relaying and the enhancing of signal between double-interface SIM card 10 and reader 1, strengthens the answer signal that double-interface SIM card 10 returns reader 1; Reader 1 is used to send command signal and receives response from double-interface SIM card; Communication interface 4 is used to realize communicating to connect of background processing system 3 and reader 1, and background processing system 3 is used to provide the back-office support of RFID exchange need.
The signal that reader 1 sends is directly received by the double-interface SIM card in the mobile communication equipment 9 10, and the signal that double-interface SIM card 10 is replied to reader 1, earlier be dealt into Signal Booster 2 with ASK or FSK or PSK modulation system, after Signal Booster 2 is finished the signal enhancing, again to return to described reader 1 with reader 1 corresponding to frequency agreement.
Mobile communication equipment 9 can adopt the mobile phone of GSM or CDMA or 3G or 4G communication network; Communication interface 4 can adopt communication interfaces such as RS232 or Ethernet.
The signal that reader 1 is dealt into double-interface SIM card 10 meets ISO/IEC 14443 standards or ISO/IEC 15693 standards or ISO11784/ISO11785 standard; Between Signal Booster 2 and the reader 1 and the communication standard between reader 1 and the double-interface SIM card 10 consistent, can adopt but be not limited to ISO/IEC 14443 standards or ISO/IEC 15693 standards or ISO11784/ISO11785 standard.
The signal modulation system that double-interface SIM card 10 is dealt into Signal Booster 2 is ASK or FSK or PSK modulation system, and carrier frequency can be 6.78MHz or 13.56MHz or 27.12MHz etc. accordingly.When adopting ASK or FSK or PSK modulation system, can adopt ASK, FSK or the PSK modulation-demodulation circuit of existing widespread use.
In a kind of specific embodiment of radio-frequency recognition system of the present invention, with reference to figure 8, the workflow of radio-frequency recognition system of the present invention can comprise: step S101 sticks on Signal Booster 2 on mobile communication equipment 9 or the reader 1; Step S102 is positioned over mobile communication equipment 9 in the communication range of reader 1, the double-interface SIM card 10 of reader 1 in mobile communication equipment 9 information of giving an order; Step S103, double-interface SIM card 10 directly receive this command information, and via Signal Booster 2, echo reply information is finished the communication interaction with reader 1; Step S104, behind mutual the end, reader 1 provides sound and light signal in order to the prompting user; Step S105, user shift out the mobile communication equipment 9 that has disposed double-interface SIM card 10 communication range of reader 1 after the prompting that is finished alternately; Step S106, double-interface SIM card 10 resets.
Wherein, mobile communication equipment 9 specifically can be mobile phone, for example, the mobile phone of GSM or CDMA or 3G or 4G communication network, double-interface SIM card is powered by battery of mobile phone.
When this double-interface SIM card 10 being put into mobile communication equipment 9 and when described double-interface SIM card 10 during to reader 1 answer signal, this answer signal is in double-interface SIM card 10, encode through sending the digital circuit interface earlier, modulate through modulating unit again, and by after the transmitted power amplifying unit carries out power amplification, be sent to Signal Booster 2 via contactless antenna with ASK or FSK or PSK modulation system, after signal strengthens again to return to reader 1 with reader 1 corresponding to frequency agreement.
In the another kind of embodiment of radio-frequency recognition system of the present invention, the described double-interface SIM card that is provided to described mobile communication equipment can have the stored value card structure; The concrete form of this stored value card can be determined in when distribution by card sending mechanism, is complementary with the radio-frequency recognition system of described card sending mechanism, and this stored value card structure can adopt prior art, does not add at this and gives unnecessary details.For the purpose of safety, in the foundation of stored value card, the process of supplementing with money, consuming, can adopt double-interface SIM card and card sender or double-interface SIM card and reader, authenticate mutually, to finish transaction.
The process of setting up with stored value card is an example, and double-interface SIM card and card sender constitute a cover radio-frequency recognition system; Wherein, the double-interface SIM card of card sender in the mobile communication equipment information of giving an order, this double-interface SIM card is replied after receiving this command information, and response message is back to card sender via the Signal Booster on the card sender; Behind mutual the end, remove the mobile communication equipment that is equipped with double-interface SIM card, interrupt itself and the communicating by letter of card sender; Card sender processing such as stores to the information that double-interface SIM card returned, and waits for the beginning of communication next time.
And in the process of consumption of stored value card, double-interface SIM card and reader constitute another cover radio-frequency recognition system; Wherein, the double-interface SIM card of reader in the mobile communication equipment information of giving an order, this double-interface SIM card is replied after receiving this command information, and response message is back to reader via the Signal Booster on the reader; Behind mutual the end, remove the mobile communication equipment that is equipped with double-interface SIM card, interrupt itself and the communicating by letter of reader; Double-interface SIM card 10 is finished laggard horizontal reset work in transaction.In other implementation, the consumption of stored value card also can be divided into dual mode by setting the restriction of consumption number: the one, and can require user oneself to confirm or special account authenticates than the consumption of wholesale, the 2nd, the consumption of small amount can be finished automatically by double-interface SIM card and reader.
Supplementing with money in the process of stored value card, supplementing with money of stored value card can have dual mode: the one, oneself directly change over to from the mobile communication equipment account by the user, and the 2nd, supplement with money by special voucher center.Supplement with money in the mode at second kind, double-interface SIM card and supplement reader with money and authenticate mutually is to finish the automatic value-charging function.
In the above-described embodiments, can realize real-time monitoring by the mobile communications networks such as GSM/CDMA/3G/4G at mobile communication equipment place, thereby mobile communications network and RFID payment network are combined effectively process of exchange.
With reference to figure 9, above-mentioned Signal Booster Pasting is used to strengthen the answer signal that described double-interface SIM card returns described reader, specifically on reader or mobile communication equipment, can comprise: receiving antenna 802 is used to receive the signal that is sent by double-interface SIM card; Signal Booster chip 803 is used to strengthen the answer signal that is received; Transmitting antenna 801 is used for sending the answer signal that strengthens and obtaining the carrier energy that reader sends to reader.
The signal that reader sends is directly received by the double-interface SIM card in the mobile communication equipment, and the signal that double-interface SIM card is replied to described reader receives by the receiving antenna 802 of described Signal Booster earlier, after described Signal Booster chip 803 is finished the signal enhancing, again to return to this reader by transmitting antenna 801 with the corresponding to frequency agreement of described reader.
Signal Booster also can comprise: first day wire pin 804, second day wire pin 805, third antenna pin 806 and the 4th day wire pin 807.Wherein, described transmitting antenna 801 is wired on the first day wire pin 804 and second day wire pin 805 of described Signal Booster chip 803; Described receiving antenna 802 is wired on the third antenna pin 806 and the 4th day wire pin 807 of described Signal Booster chip 803.
With reference to Figure 10, described Signal Booster chip 803 can comprise: receiving element 910, transmitting element 920 and power supply unit 930.
Wherein, receiving element 910 can comprise: wave filter 911, demodulation amplification module 912, digital quantization module 913; Described receiving antenna 802 receives the signal that described double-interface SIM card sends to described Signal Booster, and be sent to the input end of described wave filter 911, after wave filter 911 filtering, obtain modulation signal to be demodulated, then, carry out demodulation and amplification by 912 pairs of these modulation signals of demodulation amplification module, and export digital quantization module 913 to, carry out quantification treatment.
The signal of communication that demodulation amplification module 912 is used to amplify and demodulator filter 911 is exported specifically can comprise amplifying circuit and demodulating unit.Demodulation amplification module 912 can adopt but be not limited to the existing demodulating unit of realizing coherent demodulation method or non-coherent demodulation method.For example, for non-coherent demodulation method, can adopt the demodulation of diode peak envelope, average envelope demodulation etc.Prior art can realize that the related circuit of relevant or non-coherent demodulation method all can be used as demodulation amplification module 912 herein.
Transmitting element 920 can comprise: Logic control module 921 and modulation module 922.
Described Logic control module 921 is used to handle the digital signal of digital quantization module 913 inputs, produce corresponding steering logic according to the communication standard that is adopted, and the answer signal that produces described enhancing is back to the required subcarrier signal of reader, exports the input end of described modulation module 922 to.
Specifically, the subcarrier signal that produced of described Logic control module 921 can be decided according to ISO/IEC 14443 standards, ISO/IEC 15693 or ISO11784/ISO11785 standard that this Signal Booster chip is adopted.For example, when adopting ISO/IEC 14443 standards, the subcarrier signal frequency is 847kHz; When adopting ISO/IEC 15693 standards, the subcarrier signal frequency is 423.75kHz or 484.28kHz.
Described modulation module 922 is used for signal of communication to be sent is modulated.The modulator approach of described modulation module can adopt but be not limited to the existing modulation circuit of realizing reflection modulation or load-modulate.Can adopt following method when for example, the signal of communication after the demodulation adopts load-modulate: use a subcarrier or a plurality of sub-carrier modulation on carrier frequency, to form modulated signal; Wherein, the frequency of subcarrier and quantity are by the agreement decision of being adopted.
In a kind of specific embodiment, described modulation module 922 can send high level or low level according to modulated signal, isolated gate FET (metal-oxide-semiconductor) switch 1001 with control linkage transmitting antenna 801 two ends, thereby change the load current that is added to described transmitting antenna 801, turn back to described reader to produce subcarrier reflection modulation signal.For example, when modulation module 922 sends high level, 1001 conductings of metal-oxide-semiconductor switch, described transmitting antenna 801 constitutes a loop, has load current to flow through, and therefore produces the subcarrier reflection modulation signal that returns described reader; When modulation module 922 sent low level, metal-oxide-semiconductor switch 1001 ended, and described transmitting antenna 801 does not constitute a loop, does not have load current to flow through, and therefore also just can't produce the subcarrier reflection modulation signal that turns back to described reader.
When described Signal Booster chip 803 is worked, the carrier energy that can directly take reader and sent by described transmitting antenna 801, and by the required working power of described Signal Booster chip 803 work of described power supply unit 930 generations, thereby make this Signal Booster break away from the power supply of external direct current or interchange, realize passive work.Specifically, described power supply unit 930 can adopt bridge rectifier circuit.
In the embodiment of above-mentioned radio-frequency recognition system, SIM card is loaded on the mobile communication equipment, and still, SIM card is not limited to and must carries out work matchingly with mobile communication equipment.For example, described mobile communication equipment can provide the power supply of SIM card work, and in other embodiment, SIM card can be obtained enough energy from reader by the contactless antenna that is embedded in the card base, to keep normal operating conditions, obtaining energy by antenna is conventional scheme to those skilled in the art, does not repeat them here.
In the prior art, because the shielding action of battery of mobile phone and circuit board, the signal that double-interface SIM card sent will significantly be decayed behind the mobile phone environment, make reader often can't receive the answer signal that double-interface SIM card returns, thereby also just can't realize the proper communication of double-interface SIM card and reader.
And double-interface SIM card the respective embodiments described above of the present invention by to the received signal or signal to be sent receive respectively or send after amplifying, compensated the power attenuation of the shielding of battery of mobile phone and circuit board, improved the influence of fading of described shielding answer signal to answer signal.
In addition, radio-frequency recognition system the respective embodiments described above of the present invention also by each module of Signal Booster chip internal, have solved the problem of above-mentioned signal attenuation effectively, have realized the enhancing of signal; And, radio-frequency recognition system the respective embodiments described above of the present invention are by sticking on Signal Booster on reader or the mobile communication equipment, need not the mobile communication equipment of reader and outfit double-interface SIM card is carried out the transformation of self structure, expanded the range of application of system, the fund that reduces system research and development and time effectively and dropped into.
Though the present invention by the preferred embodiment explanation as above, these preferred embodiments are not in order to limit the present invention.Those skilled in the art without departing from the spirit and scope of the present invention, should have the ability various corrections and additional are made in this preferred embodiment, and therefore, protection scope of the present invention is as the criterion with the scope of claims.
Claims (19)
1. a double-interface SIM card is characterized in that, comprising: card base, contactless antenna and chip, wherein,
Described chip and described contactless antenna are embedded in described Ka Jinei, and described chip is connected with described contactless antenna by the contact card hard contact;
Described contactless antenna is used to receive the signal that comes from the outside and transfers to described chip, and sends the signal from described chip;
Described chip is used for carrying out demodulation process again after the signal that described contactless antenna received amplifies, and is sent to described contactless antenna after modulation signal amplified.
2. double-interface SIM card as claimed in claim 1 is characterized in that described chip comprises the RF interface unit at least, and described RF interface unit comprises at least and receive amplifying unit, demodulating unit, modulating unit and transmitting power amplifying circuit, wherein,
Described reception amplifying unit is used for and will amplifies from signal that described contactless antenna obtained and transfer to described demodulating unit;
Described demodulating unit is used for the signal after amplifying through described reception amplifying circuit is carried out demodulation;
Described modulating unit is used for modulating to sent signal;
Described transmitted power amplifying unit is used for being sent to described contactless antenna after amplifying through the signal after the described modulating unit modulation.
3. double-interface SIM card as claimed in claim 2 is characterized in that, described reception amplifying unit comprises at least:
Controllable gain amplifier is used for determining corresponding gain according to control signal, and with this gain the ac input signal that is received is amplified;
Level detection unit is used for the alternation output signal of described controllable gain amplifier output is transformed to direct current signal;
Comparer, the direct current signal and the reference signal that are used for being obtained compare, and obtain comparative result;
Control signal generating unit is used for according to described comparative result, produces the control signal of the described controllable gain amplifier of control.
4. double-interface SIM card as claimed in claim 3, it is characterized in that, described reception amplifying unit also comprises low-pass filter, be used for being filtered by the direct current signal that described level detection unit obtained, and the direct current signal after will filtering exports described comparer to.
5. double-interface SIM card as claimed in claim 2 is characterized in that, described transmitted power amplifying unit comprises C class or D class power amplifier.
6. double-interface SIM card as claimed in claim 1 is characterized in that, the plane at described contactless antenna place is parallel in twos with the plane of described chip and described card base respectively.
7. a radio-frequency recognition system of using the described double-interface SIM card of each claim among the aforesaid right requirement 1-6 is characterized in that, at least also comprises: reader and Signal Booster, wherein,
Described Signal Booster is used for doing the relaying and the enhancing of signal between described double-interface SIM card and described reader;
Described reader is used for to described double-interface SIM card transmission command signal and by the response of described Signal Booster reception from described double-interface SIM card.
8. radio-frequency recognition system as claimed in claim 7, it is characterized in that, described Signal Booster is made signal between described double-interface SIM card and described reader relaying and enhancing are meant, described Signal Booster receives the answer signal that described double-interface SIM card returns described reader, after it is strengthened the answer signal that strengthens is back to described reader.
9. radio-frequency recognition system as claimed in claim 8 is characterized in that, described Signal Booster returns the answer signal that strengthens to described reader with the frequency agreement consistent with described reader.
10. radio-frequency recognition system as claimed in claim 9 is characterized in that, described frequency agreement is ISO/IEC14443 communication standard or ISO/IEC 15693 communication standards or ISO11784/ISO11785 communication standard.
11. radio-frequency recognition system as claimed in claim 7 is characterized in that, described Signal Booster is attached on the load bearing equipment of described reader or described double-interface SIM card.
12. radio-frequency recognition system as claimed in claim 11 is characterized in that, described Signal Booster is attached on the load bearing equipment of described reader or described double-interface SIM card and is meant that described Signal Booster sticks on described reader or the described load bearing equipment.
13. radio-frequency recognition system as claimed in claim 11, it is characterized in that, the load bearing equipment of described double-interface SIM card is a mobile communication equipment, and described mobile communication equipment provides reset signal and clock signal to described double-interface SIM card, and carries out data communication with described double-interface SIM card.
14. radio-frequency recognition system as claimed in claim 13 is characterized in that, described mobile communication equipment comprises the mobile phone that adopts GSM or CDMA or 3G or 4G communication network.
15. radio-frequency recognition system as claimed in claim 7 is characterized in that, described Signal Booster comprises:
Receiving antenna is used to receive the answer signal that is sent by described double-interface SIM card;
The Signal Booster chip is used to strengthen the answer signal that is received;
Transmitting antenna is used for sending the answer signal that strengthens and obtaining the carrier energy that described reader sends to described reader.
16. radio-frequency recognition system as claimed in claim 15 is characterized in that, described Signal Booster chip comprises: receiving element, transmitting element and power supply unit; Wherein,
Described receiving element is used to receive the answer signal that described double-interface SIM card sends to described reader, and it is carried out demodulation and amplification;
Described transmitting element is used for the answer signal after the described amplification is modulated and sent;
Described power supply unit is used to provide the working power of described Signal Booster chip.
17. radio-frequency recognition system as claimed in claim 7, it is characterized in that, the signal that described double-interface SIM card is replied to described reader, be sent to described Signal Booster with ASK or FSK or PSK modulation system, corresponding carrier frequency is respectively 6.78MHz or 13.56MHz or 27.12MHz.
18. radio-frequency recognition system as claimed in claim 7 is characterized in that, described radio-frequency recognition system also comprises: the back-office support that provides RFID exchange to need is provided background processing system; And communication interface, be used to realize communicating to connect of background processing system and reader.
19. radio-frequency recognition system as claimed in claim 18 is characterized in that, described communication interface comprises the communication interface that adopts RS232 or Ethernet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101353141A CN101561891B (en) | 2008-04-18 | 2009-04-17 | Dual-interface SIM card and radio frequency identification system thereof |
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| CN200810036255.8 | 2008-04-18 | ||
| CNA2008100362558A CN101303745A (en) | 2008-04-18 | 2008-04-18 | Double-interface SIM card and radio frequency recognition system thereof |
| CN2009101353141A CN101561891B (en) | 2008-04-18 | 2009-04-17 | Dual-interface SIM card and radio frequency identification system thereof |
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| Publication Number | Publication Date |
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| CN101561891A true CN101561891A (en) | 2009-10-21 |
| CN101561891B CN101561891B (en) | 2011-04-27 |
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| CNA2008100362558A Pending CN101303745A (en) | 2008-04-18 | 2008-04-18 | Double-interface SIM card and radio frequency recognition system thereof |
| CN2009101353141A Expired - Fee Related CN101561891B (en) | 2008-04-18 | 2009-04-17 | Dual-interface SIM card and radio frequency identification system thereof |
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| CNA2008100362558A Pending CN101303745A (en) | 2008-04-18 | 2008-04-18 | Double-interface SIM card and radio frequency recognition system thereof |
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| WO (1) | WO2009127159A1 (en) |
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| CN102752008A (en) * | 2012-06-05 | 2012-10-24 | 上海坤锐电子科技有限公司 | Active signal enhancer and radio frequency identification system thereof |
| CN104504354A (en) * | 2014-12-04 | 2015-04-08 | 广州中大微电子有限公司 | High-performance anti-noise comparer suitable for RFID (Radio Frequency Identification Devices) and RFID chip |
| CN107733457A (en) * | 2017-11-14 | 2018-02-23 | 上海坤锐电子科技有限公司 | A kind of processing method of radio frequency front end chip and radiofrequency signal |
| CN110490015A (en) * | 2019-06-28 | 2019-11-22 | 北京中电华大电子设计有限责任公司 | A kind of method of elevating ultrahigh baud rate (VHBR) communication compatibility |
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| CN101303745A (en) * | 2008-04-18 | 2008-11-12 | 上海坤锐电子科技有限公司 | Double-interface SIM card and radio frequency recognition system thereof |
| CN101751719B (en) * | 2008-12-03 | 2011-12-28 | 国民技术股份有限公司 | Method and device for improving accuracy of trading system communication distance with temperature compensation |
| FR2947364A1 (en) * | 2009-06-25 | 2010-12-31 | St Microelectronics Sas | AUTHENTICATION OF A TERMINAL-ELECTROMAGNETIC TRANSPONDER COUPLE BY THE TERMINAL |
| CN101587557B (en) * | 2009-06-29 | 2015-12-09 | 北京握奇数据系统有限公司 | A kind of Subscriber Identity Module and manufacture method thereof and system |
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| CN101894291A (en) * | 2010-07-28 | 2010-11-24 | 北京华大智宝电子系统有限公司 | Dual-interface SIM card |
| US8532619B2 (en) | 2010-12-30 | 2013-09-10 | Samsung Electronics Co., Ltd. | System for authorizing the use of communication devices by proximity |
| CN106025489B (en) * | 2016-05-31 | 2019-01-08 | 江苏赛博宇华科技有限公司 | A kind of Signal Booster |
| CN107181737B (en) * | 2017-04-24 | 2019-10-08 | 深圳市中远达智能科技有限公司 | A kind of data processing method, reader and server |
| CN110796228A (en) * | 2019-11-27 | 2020-02-14 | 宜宾靖丰电子科技有限公司 | Single-bus double-interface multifunctional radio frequency card electronic tag chip and electronic tag |
| CN113902078B (en) * | 2021-11-04 | 2024-03-22 | 厦门忻德物联网科技有限公司 | Remote ID identity recognition method and system suitable for being within 1500 meters |
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| CN101150604A (en) * | 2006-09-21 | 2008-03-26 | 北京中电华大电子设计有限责任公司 | Dual interface SIM card and its application scheme |
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- 2008-04-18 CN CNA2008100362558A patent/CN101303745A/en active Pending
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- 2009-04-17 CN CN2009101353141A patent/CN101561891B/en not_active Expired - Fee Related
- 2009-04-17 WO PCT/CN2009/071328 patent/WO2009127159A1/en active Application Filing
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102752008A (en) * | 2012-06-05 | 2012-10-24 | 上海坤锐电子科技有限公司 | Active signal enhancer and radio frequency identification system thereof |
| CN104504354A (en) * | 2014-12-04 | 2015-04-08 | 广州中大微电子有限公司 | High-performance anti-noise comparer suitable for RFID (Radio Frequency Identification Devices) and RFID chip |
| CN107733457A (en) * | 2017-11-14 | 2018-02-23 | 上海坤锐电子科技有限公司 | A kind of processing method of radio frequency front end chip and radiofrequency signal |
| CN110490015A (en) * | 2019-06-28 | 2019-11-22 | 北京中电华大电子设计有限责任公司 | A kind of method of elevating ultrahigh baud rate (VHBR) communication compatibility |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009127159A1 (en) | 2009-10-22 |
| CN101561891B (en) | 2011-04-27 |
| CN101303745A (en) | 2008-11-12 |
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