CN1226984A - High-frequency identification means with passive electronic data storage medium - Google Patents
High-frequency identification means with passive electronic data storage medium Download PDFInfo
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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
- G06K19/0726—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 the arrangement including a circuit for tuning the resonance frequency of an antenna on the record carrier
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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
-
- 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
-
- 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
- G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
-
- 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
- G06K7/08—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes
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Abstract
The invention relates to a high-frequency identification means (IM) with a passive electronic data storage medium, comprising a processor, an electronic control unit and a memory, as well as a receiving aerial (15) for receiving operating energy and for the non-contact transmission of HF signals (20) to an assigned write/read station (WR) having a transmission aerial (24). The carrier frequency (fr) designated by the transmission aerial is above 1 MHz so as to allow for high communication output. An external capacitor (Ce) is connected in parallel to the receiving aerial (15), whereby the capacity of the external capacitor (Ce) is greater, preferably several times greater, than the capacity of the internal capacitor (Ci) of the data support medium (MI). This allows for significantly improved communication output, especially with small identification means.
Description
The present invention relates to the high frequency identification medium according to claim 1 preamble with passive electronic data carrier, these high frequency identification medium have a receiving antenna, it is used for receiving the operation energy, and be used for one distributed have emitting antenna write with sensing station on the contactless transmission of high-frequency signal, this emitting antenna has a carrier frequency fr greater than 1MHz.In order to realize high communication efficiency and transfer efficiency, it is necessary having the above system's pulse of 1MHz or the high frequency of carrier frequency.To this, the Legic system of Kaba Ag is an example.
Different fully with the high frequency wireless transmission of in remote zone, making every effort to high efficient, in these identification medium only on two directions in the near field high efficient be necessary, yet maintained very little in remote regional internal efficiency with relevant loss to this.This require two big as far as possible antennas, write with sensing station, identification coupling medium and the antenna special shape.
In order to realize a perfect power transfer by receiving antenna by enough these passive identification medium, and in order in coupling regime, to realize big as far as possible reach, used to have higher inductance, that is to say receiving antenna, and only the natural capacity of data carrier MI is correspondingly used as the additional capacitor of oscillatory circuit with a plurality of coils.Different significant limitations and problem also often appear in these known identification medium:
-may only limit identification medium tuning of carrier frequency.
The instability of-receive frequency.
The powerful influence of-receive frequency.This causes having reduced reach and communication efficiency.
Task of the present invention is to set up identification medium, and it can make these problems obtain basic improvement.Solve this task by identification medium, realized better transport property by these identification medium according to claim 1.
In addition, opposite with whole development trends, discerning on the medium or on data carrier, do not producing a high as far as possible input voltage by antenna with higher inductance, but opposite fully input voltage and the inductance of reducing, that is to say the coil turn of antenna, and by inserting an additional external capacitive Ce, correspondingly improved total capacitance greatly, it is greater than the internal capacitance Ci of data carrier MI.
Therefore, realized a plurality of independent advantages, its combination draws good transport property:
The receive frequency of-identification medium can be better and is aligned to carrier frequency more accurately.
-receive frequency almost is constant, and seldom depends on external action.
-therefore realized a higher and constant reach of communication, and realized all better antenna efficiency.
Dependent claims relates to useful improvement of the present invention, and it has caused the other improvement of transport property, and makes the generally use of these identification medium become possibility.Further specify the present invention by means of embodiment and accompanying drawing below.Diagram
Fig. 1. have external capacitive according to identification media IM of the present invention,
Fig. 2. writing and sensing station WR of being distributed,
Fig. 3. have the additional examples of the identification medium of code communication,
Fig. 4. have the example of double antenna and the external capacitive of being distributed,
Fig. 5. the communication characteristic under the effect of the receive frequency that relates to carrier frequency,
Fig. 6. the dependence of receive frequency to being coupled,
Fig. 7. the influence of the relative orientation of the reach R of communication and solid angle W and antenna,
Fig. 8. current use line as in the ISO card body size of antenna identification medium an example,
Fig. 9. have the little identification medium of the magnetic antenna of a wrist-watch form,
Figure 10. as a small-sized key chain of identification medium.
Fig. 1 and 3 shows the example that is fit to identification media IM of the present invention, and Fig. 2 shows writing and sensing station WR of being distributed.The general description of Fig. 1 shows an identification media IM with passive electronic data carrier MI, and this data carrier comprises a processor 11, a control electronic installation 13 and a storer 12.Receiving antenna 15 with inductance L is used for receiving operation energy 20a, and be used for one distributed read or write with sensing station WR on the contactless transmission of high-frequency signal (20).An external capacitive Ce is with receiving antenna 15 parallel connections, and wherein capacitor C e is greater than the internal capacitance Ci of data carrier MI.The inductance L of this outside antenna and external capacitive Ce are so tuning, promptly realize the natural frequency f of identification medium, and it conforms to carrier frequency fr.Determine carrier frequency fr by writing with sensing station WR and its emitting antenna 24.
According to the sensing station that is distributed of Fig. 2 or write with sensing station WR and produce system's pulse, carrier frequency fr, it is transferred to the identification media IM by emitting antenna 24.In addition, energy 20a not only, its operation for the identification media IM is essential, and the data 20b that writes with sensing station WR is transferred on the identification media IM.In order to realize high communication efficiency, carrier frequency must be in the scope greater than 1MHz, mainly 5 and 20MHz between, and be no more than 30MHz.This is related to as far as possible perfectly transmission and other or the like, that is to say in the near field and must realize a strong coupling, yet should reflect alap power in remote areas.Therefore according to the high-frequency range that has illustrated, this near field range is in 1 and 100 meter the order of magnitude, and to be in one be in the important scope for the identification medium.A useful carrier frequency for example is in the ISM frequency band of 13.56MHz, by this frequency, can realize best transport property for the transmission range in several meters.
Opposite with general developing direction, have a mind to reduce the inductance L of receiving antenna 15, and cause the important improvement of communication efficiency KL by the principle suitable of the present invention that a bigger external capacitive Ce improves the predetermined capacitor C i of identification medium.According to the inductance L that on receiving antenna 15, reduces, although this has reduced input voltage.
This will be described in Figure in Fig. 5 to 7.Fig. 5 has illustrated that communication efficiency is to writing with the carrier frequency fr of sensing station and having the consistent dependence of emitting antenna 24 and receiving antenna 15 of the natural frequency f of identification medium.Communication efficiency (perhaps communication capacity or communication characteristic) is reach R and the solid angle W that for example communicates by letter, and from receiving antenna 15 to antenna the angular region W2 of relative position of 24 field, communication is possible in this antenna field.
As can be seen from Figure 5, communication efficiency depends on the consistent of carrier frequency fr and receive frequency f very much, that is to say to realize optimum coupling when two natural frequency: f=fr are consistent.Along with the increase communication efficiency of f-fr difference reduces very terriblely, so that under the deviation situation of a few percent, produced not enough communication efficiency KL.
Two antenna frequencies f and fr's is consistent, that is to say a natural frequency f who realizes the identification medium, and it conforms to writing with the transmission frequency fr who provides of sensing station WR, so far owing to different reasons is almost impossible.
Fig. 6 shows natural frequency f to antenna coupling AK or two antenna spacing dependences.In addition, along with the increase of coupling AK, for example the natural frequency f1 of 10%, one identification medium in the past descends very terriblely.Relative therewith, the frequency characteristic f2 that is fit to new antenna of the present invention shows very little decline, and for example only 1 to 3%.That is to say by according to the stable new antenna ratio of curve f2 by can for example realizing better according to the antenna before curve f1 unstable ± 2% Measurement Allowance.Therefore, by this new antenna realized very high antenna efficiency (R, W, W2).
In communication, write with the field line H of the antenna 24 of sensing station WR and have among Fig. 7 of a reach R that can obtain and a possible solid angle W explanation this is possible having with identification media IM.Additionally this also depends on the relative position of the receiving antenna 15 among the H: along with the increase of the angle W2 between H at antenna normal and field, communication efficiency weakens.Realize higher R, W, the value of W2 according to this new receiving antenna suitable of the present invention 15.
Carrier frequency comparative example that is used for 13.56MHz below and the comparative example that is used for the identification medium of before and ISO forms (referring to Fig. 8) new identification medium illustrate this. therefore, realize natural frequency f=fr in couple state, the natural frequency of identification medium is adjusted to face amount down in idling:
Antenna f1=16.5 ± 1.5MHz in the past
New antenna f2=13.6 ± 0.3MHz
For the identification medium natural frequency f be fit to this relation (2 π f)
2LC=1.
Identification medium C=Ci=16pF in the past
L=6μH
Number of turns N=5 to 6
New identification medium C=Ci+Ce=16pF+100 to 300pF
L=1.2 to 0.5 μ H
Number of turns N=2 to 3
Result from the powerful dependence of the internal capacitance Ci of the data carrier MI in the coupling according to the powerful dependence of the coupling AK of the antenna before the curve f1 among Fig. 6.
This dependence is along with relatively large external capacitive Ce reduces very terriblely, and wherein this electric capacity does not rely on according to the coupling AK in the new antenna of the curve f2 of Fig. 6.
Therefore, the stable external capacitor C e that at first has higher capacity is than big several times of internal capacitance Ci, and is for example big 5 to 10 times.
Therefore, realized the very high quality factor q=fr/B (oscillation frequency/bandwidth) of the oscillatory circuit of identification medium.At first these quality factor are at least 50.
In the former identification medium, cause instability or the change of antenna frequencies f by different influences: the change of the internal capacitance Ci by data carrier, it is except the dependence of having estimated of stiffness of coupling, also by the conductor in environmental impact, impressed field, the field, stray capacitance and aging action influence.The big relatively production diffusion of the high proportion of goods damageds (poor quality) and the Ci value of internal capacitance Ci also appears in addition.Show that natural frequency changes accordingly in the former identification medium of all these influences and the change of Ci value.
In according to antenna of the present invention, these influences have been eliminated by having higher capacity, stability and having most of accurately external capacitive Ce with selectable capacitance of definition, and therefore realized corresponding stable, defined and selectable frequency f, just as has been stated, this has caused high communication efficiency KL.
According to according to the solution of the present invention, also realized about the design of identification medium and the significant advantage of production.Because, natural frequency f be can very accurately define and also can measure, correspondingly can tuning very exactly natural frequency to carrier frequency fr.The adjustment of the desired ratings of natural frequency f is very accurate and simple possible, because additional external capacitive Ce has accurately definition and a stable value, this value is to select arbitrarily.Therefore, also offset the relatively large diffusion of Ci value in the production of integrated circuit in simple mode.In addition for example for the antenna model (about the size and the quantity of sky ring coil) only by the corresponding different natural frequency f that require of identification basis that selected different external capacitive value simple realization.
Because the number of aerial coil N must be an integer, and provides the internal capacitance Ci of data carrier MI, to this, the realization of the desired ratings of natural frequency f is very difficult aborning and is possible inaccurate in the former identification medium.
Fig. 3 has illustrated an example of the identification medium that are used for code communication.Data carrier MI at first forms asic chip 16, here comprise a through condenser 17 that is used to store received energy and is used to eliminate transmission of interrupted, voltage regulator 3, a pulse processor 4, receiving demodulation device 5, emission detuner 6 and coding and communication logic 7 and an eeprom memory that has illustrated 12, this storer has 256 bytes at first at least.By from writing and sensing station WR can be implemented in to the pulsed modulation (Puls-Pausenmodulation) of identification media IM and by the load-modulate the opposite direction from IM to WR and writes and sensing station WR and favourable energy and the data transmission discerned the media IM.
The medium of so discerning with visit and authorization function are known for different equipment with use or for different applications, the for example measure of managing as definite scope and time of a company (electronic key) that enters, as the instrument access medium of data equipment for example, perhaps also as the effective measures system that is used to obtain power.What therefore, have very high transfer efficiency and a transmittability is particularly suitable for application about functional reliability and data security, the property monitored, the high request that prevents to abuse or the like according to identification medium of the present invention.To this, the identification media IM with write and sensing station WR between use the communicating by letter an of coding, for example, in each identifying, produce a new recognition data when writing with sensing station, and it is transmitted into identification during media IM, and which these data is connected with the code of having enciphered 32 (in Fig. 3) logic of a fixing storage at, and sends back to the form of encoding and to write and sensing station, where translate and check this information, then between WR and IM, carry out a synchronous communication.
In addition, in order to satisfy high safety requirements synchronously, these identification medium can also make up with the encoding function of an identity.For this reason, can use for example PIN code or bionical digital coding.For example determine the bionical data of status, and compare with the code of in data carrier MI, storing accordingly 33 (Fig. 3) for purpose this bionical data of a customer identification and an authorization carrier of proof from the geometry of fingerprint or finger, hand and head.
Only make the identification medium have higher communication capacity to become possible other very important application and be that the data structure of the storer 12 of data carrier MI to this, can be used a plurality of mutual ind applications in the ADF of the request for data field of a sectional.Therefore, owing to higher communication efficiency, realized the function of its manyfold to a certain extent according to identification medium of the present invention.
Fig. 4 shows the another one example of the identification medium with receiving antenna, and this dwi hastasana becomes the double antenna with two ring coils 15.1 and 15.2.Here, first antenna loop coil 15.1 is used to receive the energy of electromagnetic field 20a that supplies with data carrier, and is used to receive the data 20b that writes with sensing station WR.Second antenna loop coil 15.2 is used to launch data 20b to writing and sensing station WR.Antenna part 15.1 and 15.2 is adapted to internal capacitance Ci1 and the Ci2 of data carrier MI.So determine to be connected to the external capacitive Ce1 and the Ce2 of each antenna part 15.1 and 15.2, promptly the antenna frequencies of two antenna loop coils is identical, and this means under the situation of two identical branch inductance: Ce1+Ci1=Ce2+Ci2.
Fig. 8 a and b show that (85 * 54mm) identification medium, this lead is as antenna 15 as the ISO card physique formula 28 with printed circuit board (PCB) upper conductor 26 of special Commonly Used Size.To this, the antenna loop coil can become one with external capacitive Ce and with data carrier MI on the carrier 29 (insert), and therefore forms a unit of reasonable production especially.For example a ceramic capacitor can be used as external capacitive Ce, and this ceramic capacitor has very simply such as 0.3 to 0.5mm thick manufacture method only and has better quality in the MHz frequency range.
Fig. 9 and 10 show small-sized (30) identification medium example, wherein, the diameter DA of receiving antenna 15 should utilize operational at any time position as much as possible fully, thus the area FA of antenna almost with identification medium entire area consistent.Former have a 30mm and still less, for example only in the small-sized identification medium of the antenna diameter of 10mm, realize that perfect communication performance and high reach are difficulties especially.Since additional external capacitive Ce and the corresponding inductance L that reduces of antenna 15 according to combination of the present invention, needed corresponding circlet wire circle with comparing in the past, can be possible with less antenna area work perhaps with former comparing for a short time.Therefore, relatively large ISO pattern card body before using can be realized approximately identical communication role scope with the little identification medium that resemble key, key chain, souvenir or the like.Therefore can open up brand-new application.
Fig. 9 shows example, and receiving antenna forms the ferrite with a clavate and the magnetic antenna 19 of an electronic coil in this example.In this example, identification medium are arranged on watchband 36.
For small-sized identification medium, when the number of turns of antenna loop coil for example correspondingly is reduced to fewer than half, under the carrier frequency fr of 13.56MHz situation, for example use the external capacitive of 50-150pF according to Fig. 9 and 10.
A useful especially improvement of the present invention is, also stablizes carrier frequency fr in a similar manner in emission side, that is to say to make to write the influence that does not rely on extraneous electric capacity with the emitting antenna 24 of sensing station WR.Though the carrier frequency fr natural frequency f than the identification medium itself is more stable,, can significantly improves communication performance KL once more with identical meaning as discerning in the medium by the further stable of carrier frequency fr, and improve reach especially.
Carrier frequency fr is resembled the identical influence that has illustrated in principle: by the change of electric capacity in the environment, for example by human body near and hardware approaching, aging or the like by production tolerance and electric capacity.The accurate adjustment of the desirable ratings of carrier frequency fr requires the tuning of a complexity so far.
By on emitting antenna 24, also using the same principle in the receiving antenna 15 that coexists, realized this stable and improvement.As in Fig. 2 as variable declaration, additional capacitor Cz is connected to emitting antenna, and the inductance of this antenna correspondingly diminishes, so the long-pending LC of emitting antenna 24 remains unchanged.At first additional capacitor Cz selects bigger than writing with the already present equivalent capacity (that is to say and do not have additional capacitor) of sensing station WR of the basic point that relates to emitting antenna better.2 to 5 times of the equivalent capacity that additional capacitor can advantageously exist.
This additional capacitor Cz comprises a standard component with C value selectable accurate definition and stable.Therefore, except the single tuning of complexity, can produce the desirable ratings of carrier frequency fr continuously in simple mode.
A useful especially and general spendable emitting antenna 24 can form chip aerial, for example as the antenna loop coil of the form of a wide circuit on plastic stent (being similar to the very little antenna 15 in the example of Fig. 8).
As an example: the circuit ring coil with only diameter with 60cm and 25mm face width (with the form that is fit to: the garden, oval, rectangle or the like) can be realized up to 1m and more reach R.Make up to 1m and more reach and become possibility.
Each desirable carrier frequency fr can be directly adjusted in simple selection by Cz value (as the series connection component), except the experimental work and the tuning work of necessary so far complexity.
Mark below in the present patent application scope, having used: the receiving antenna 15.1 of 3 voltage regulator 4 pulse processors, 5 receiving demodulation device 6 emission detuners, 7 codings and communication logic 11 processors 12 storeies 13 control electronic installations 15 IM, 15.2 circuit 28 ISO card bodies 29 supports on the double antenna 16 asic chips 17 through condensers 19 magnetic antennas 20 high-frequency communication 20a power transfer 20b data transmission 24 emitting antenna WR26 wiring boards, the bionical encoding function of insert 30 small-sized 32 coding 33 status, 36 watchbands, 37 pendicle product IM discern medium MI electric data carrier WR sensing stations or write the carrier frequency with sensing station fr, the quality factor H field wire direction KL communication efficiency of the frequency Q=fr/B IM of the pulse f IM of system of WR, communication capacity, the additional capacitor ADF request for data field of diameter FA antenna 15 area A K antennas coupling (at interval) Df margin tolerance f-frN wire circle L inductance Ce external capacitive Ci internal capacitance Cz 24 of the angle DA emitting antenna 15 of solid angle W2 field between H and antenna normal that communication characteristic R communication role scope W is used to communicate by letter
Claims (24)
1. the high frequency identification media IM that has passive electric data carrier MI, wherein this data carrier comprises processor (11), control electronic installation (13) and storer (12), and these high frequency identification medium have receiving antenna (15), its be used for receiving operation energy (20a) and be used for one distributed write with sensing station WR on the contactless transmission of high-frequency signal (20), wherein this writes with sensing station and has emitting antenna (24), these high frequency identification medium have the carrier frequency fr of 1MHz at least, determine this carrier frequency by emitting antenna, it is characterized in that, an external capacitive Ce and a receiving antenna (15) also connect, and wherein capacitor C e is greater than the internal capacitance Ci of data carrier MI.
2. according to the identification medium of claim 1, it is characterized in that, determine carrier frequency fr by writing, determine the external capacitive Ce and the inductance L of the receiving antenna (15) of frequency f and identification media IM by following relational expression: (2 π f) with the emitting antenna (24) of sensing station WR
2L (Ci+Ce)=1, wherein fr=f ± 3%.
3. according to the identification medium of claim 1, it is characterized in that data carrier MI has a through condenser (17) that is used to store received energy, a voltage regulator (3), a pulse processor (4), a receiving demodulation device (5), an emission detuner (6), coding and a communication logic (7) and an eeprom memory (12).
4. according to the identification medium of claim 1, it is characterized in that data carrier forms the asic chip (16) of the eeprom memory (12) with one at least 256 byte.
5. according to the identification medium of claim 1, it is characterized in that, carrier frequency fr 1 and 30MHz between, mainly 5 and 20MHz between.
6. according to the identification medium of claim 1, it is characterized in that carrier frequency fr is corresponding to the ISM frequency band of 13.56MHz.
7. according to the identification medium of claim 1, it is characterized in that at least 5 times of external capacitive Ce are to data carrier MI internal capacitance Ci.
8. according to the identification medium of claim 1, it is characterized in that external capacitive Ce is between 100pF and 300pF.
9. according to the identification medium of claim 1, it is characterized in that the quality factor q=fr/B of IM resonant circuit (resonance frequency/bandwidth) is at least 50.
10. according to the identification medium of claim 1, it is characterized in that external capacitive Ce comprises that has the thick ceramic capacitor of the highest 0.5mm.
11. the identification medium according to claim 1 is characterized in that, receiving antenna (15) forms the circuit (26) on the wiring board.
12. the identification medium according to claim 1 is characterized in that, antenna loop coil (15) is corresponding to ISO card physique formula (28).
13. the identification medium according to claim 1 is characterized in that, antenna loop coil (15) and external capacitive Ce and become one with data carrier MI on the support (29) (insert).
14. the identification medium according to claim 1 is characterized in that, the diameter of receiving antenna (15) is the highest 3cm in small-sized identification medium (30).
15. identification medium according to claim 1, it is characterized in that, receiving antenna forms by a centre tap has each external capacitive (Ce1, Ce2) double antenna (15.1,15.2), wherein use the antenna loop coil that is suitable for received energy (20a) and data and be used to launch the other antenna loop coil of data.
16. the identification medium according to claim 1 is characterized in that, receiving antenna forms the ferrite with a clavate and the magnetic antenna (19) of an electronic coil.
17. the identification medium according to claim 1 is characterized in that, are undertaken from writing the data transmission to the identification media IM with sensing station WR by pulsed modulation, and carry out reciprocal data transmission by load-modulate.
18. the identification medium according to claim 1 is characterized in that, to writing and sensing station WR and communicate by letter (20) of identification between the media IM encode (32).
19. the identification medium according to claim 18 is characterized in that, storer (12) has a request for data field ADF who is used for the sectional of a plurality of mutual ind applications.
20. the identification medium according to claim 18 is characterized in that, data carrier MI comprises an additional identities encoding function (33) that resembles PIN code or bionical data code.
21. the identification medium according to writing of being distributed of having of claim 1 and sensing station is characterized in that, write with sensing station WR to have an emitting antenna (24) its additional capacitor Cz in parallel.
22. the identification medium according to claim 21 is characterized in that, additional capacitor Cz is the same big with the equivalent capacity of sensing station WR with writing of the basic point that relates to the emitting antenna (24) that does not have additional capacitor Cz at least.
23. the identification medium according to claim 21 is characterized in that, additional capacitor Cz two is to the equivalent capacity with sensing station WR of writing that is five times in the basic point that relates to the emitting antenna (24) that does not have additional capacitor Cz
24. the identification medium according to claim 21 is characterized in that, emitting antenna (24) forms chip aerial, and mainly has only antenna loop coil.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH553/97 | 1997-03-07 | ||
| CH55397 | 1997-03-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1226984A true CN1226984A (en) | 1999-08-25 |
Family
ID=4189665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98800608A Pending CN1226984A (en) | 1997-03-07 | 1998-02-20 | High-frequency identification means with passive electronic data storage medium |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP0898763A1 (en) |
| JP (1) | JP2000509869A (en) |
| KR (1) | KR20000010848A (en) |
| CN (1) | CN1226984A (en) |
| AR (1) | AR011183A1 (en) |
| AU (1) | AU741616B2 (en) |
| BR (1) | BR9805934A (en) |
| CA (1) | CA2252411A1 (en) |
| WO (1) | WO1998040846A1 (en) |
| ZA (1) | ZA981382B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100397416C (en) * | 2002-05-27 | 2008-06-25 | Nxp股份有限公司 | Passive data carrier with signal evaluation means for evaluating information of a self-locking signal |
| CN105914478A (en) * | 2015-01-27 | 2016-08-31 | 星晶公司 | Microelectronic Chip With Multiple Pads |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6522308B1 (en) * | 2000-01-03 | 2003-02-18 | Ask S.A. | Variable capacitance coupling antenna |
| JP4145664B2 (en) | 2001-04-26 | 2008-09-03 | エヌエックスピー ビー ヴィ | Data carrier having integrated circuit with integrated main capacitor and integrated additional capacitor |
| DE10124222A1 (en) | 2001-05-18 | 2002-11-21 | Atmel Germany Gmbh | Method for matching an antenna resonant circuit of a passive transponder |
| JP2005165703A (en) * | 2003-12-03 | 2005-06-23 | Hitachi Ltd | Non-contact identification medium |
| DE10356676B4 (en) * | 2003-12-04 | 2012-07-19 | Giesecke & Devrient Gmbh | Electronic device with a security module |
| JP2007214754A (en) * | 2006-02-08 | 2007-08-23 | Matsushita Electric Ind Co Ltd | Antenna device |
| EP1814191A3 (en) * | 2006-01-30 | 2007-08-29 | Matsushita Electric Industrial Co., Ltd. | Antenna apparatus |
| EP2717196B1 (en) * | 2007-12-26 | 2020-05-13 | Murata Manufacturing Co., Ltd. | Antenna device and wireless IC device |
| JP5741083B2 (en) * | 2011-03-10 | 2015-07-01 | 株式会社村田製作所 | RFID reader / writer |
| US11809926B2 (en) | 2020-02-04 | 2023-11-07 | Fujifilm Corporation | Noncontact communication medium, magnetic tape cartridge, and manufacturing method of noncontact communication medium |
| JP7376463B2 (en) * | 2020-02-04 | 2023-11-08 | 富士フイルム株式会社 | Non-contact communication medium, magnetic tape cartridge, and method for manufacturing non-contact communication medium |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4802080A (en) * | 1988-03-18 | 1989-01-31 | American Telephone And Telegraph Company, At&T Information Systems | Power transfer circuit including a sympathetic resonator |
| AT401127B (en) * | 1994-02-23 | 1996-06-25 | Mikron Ges Fuer Integrierte Mi | CONTACTLESS DATA TRANSFER SYSTEM |
| DE4438287C1 (en) * | 1994-10-26 | 1996-05-09 | Siemens Ag | System for contactless energy and data transmission |
| US5953642A (en) * | 1994-10-26 | 1999-09-14 | Siemens Aktiengesellschaft | System for contactless power and data transmission |
-
1998
- 1998-02-19 ZA ZA981382A patent/ZA981382B/en unknown
- 1998-02-20 KR KR1019980708991A patent/KR20000010848A/en not_active Application Discontinuation
- 1998-02-20 WO PCT/CH1998/000068 patent/WO1998040846A1/en not_active Application Discontinuation
- 1998-02-20 CA CA002252411A patent/CA2252411A1/en not_active Abandoned
- 1998-02-20 EP EP98902919A patent/EP0898763A1/en not_active Withdrawn
- 1998-02-20 BR BR9805934-3A patent/BR9805934A/en not_active Application Discontinuation
- 1998-02-20 AU AU59794/98A patent/AU741616B2/en not_active Ceased
- 1998-02-20 CN CN98800608A patent/CN1226984A/en active Pending
- 1998-02-20 JP JP10539016A patent/JP2000509869A/en active Pending
- 1998-03-06 AR ARP980101005A patent/AR011183A1/en unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100397416C (en) * | 2002-05-27 | 2008-06-25 | Nxp股份有限公司 | Passive data carrier with signal evaluation means for evaluating information of a self-locking signal |
| CN105914478A (en) * | 2015-01-27 | 2016-08-31 | 星晶公司 | Microelectronic Chip With Multiple Pads |
| CN105914478B (en) * | 2015-01-27 | 2017-12-22 | 星晶公司 | Microelectronic chip with multiple contacts |
Also Published As
| Publication number | Publication date |
|---|---|
| AR011183A1 (en) | 2000-08-02 |
| KR20000010848A (en) | 2000-02-25 |
| AU741616B2 (en) | 2001-12-06 |
| ZA981382B (en) | 1998-08-24 |
| JP2000509869A (en) | 2000-08-02 |
| CA2252411A1 (en) | 1998-09-17 |
| AU5979498A (en) | 1998-09-29 |
| EP0898763A1 (en) | 1999-03-03 |
| WO1998040846A1 (en) | 1998-09-17 |
| BR9805934A (en) | 1999-08-31 |
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