CN203759736U - Double-frequency dual-purpose long-distance metal-resistant RFID passive tag - Google Patents
Double-frequency dual-purpose long-distance metal-resistant RFID passive tag Download PDFInfo
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- CN203759736U CN203759736U CN201420114072.4U CN201420114072U CN203759736U CN 203759736 U CN203759736 U CN 203759736U CN 201420114072 U CN201420114072 U CN 201420114072U CN 203759736 U CN203759736 U CN 203759736U
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- insulation medium
- medium board
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Abstract
The utility model discloses a double-frequency dual-purpose long-distance metal-resistant RFID passive tag which comprises an insulating dielectric plate. The front side and the rear side of the insulating dielectric plate are provided with feed network pasters of different electrical lengths. The lateral side of the double-frequency dual-purpose long-distance metal-resistant tag is provided with a tag chip and a resonant capacitor, wherein the tag chip is connected with the resonant capacitor in parallel and with a feed network circuit in series. The double-frequency dual-purpose long-distance metal-resistant RFID passive tag has the advantages of long reading distance, resistance to interference of metal environment, low cost, wide application range and applicability to both American and European frequencies.
Description
Technical field
The utility model belongs to RFID applied technical field, relates to the dual-purpose remote anti-metal RFID passive label of a kind of double frequency.
Background technology
RFID(RadioFrequencyIdentification, radio-frequency (RF) identification) be a kind of contactless automatic identification technology.Rely on advantage and the huge development potentialities such as its memory capacity is large, identification target is many, noncontact is read, data can be encrypted, RFID is described as one of most important technology of 21 century, and be subject to the extensive concern of global all circles, produced far-reaching influence to human society productive life.In recent years, along with constantly improving with ripe of correlation technique, through technology hatching and cultivation for many years, RFID technology just becomes better and approaching perfection day by day, and has successfully been applied in the middle of the numerous areas such as production control, intelligent transportation, public safety, article anti-counterfeit, mobile payment and indoor positioning at present.
Rfid system is generally comprised of read write line and label, and read write line passes through the information in less radio-frequency (low frequency LF, high frequency HF, ultrahigh frequency UHF, microwave M W) reading tag, the data communication between realization and label.Low frequency and high frequency rfid system mainly utilize inductive coupling to realize recognition function, read close together, are generally no more than 1 meter; Ultrahigh frequency and microwave frequency band rfid system mainly complete identifying by Electromagnetic Wave Propagation, have the far away distance that reads, and can reach more than 10 meters.Wherein, UHFRFID, because of excellent performance, has become the main flow of current application, is mainly manifested in: (1) UHFRFID system frequency is moderate, and data read rates is fast, is applicable to far Distance RFID system and uses; (2) UHFRFID label is by wireless power, and it is passive; (3) UHFRFID label, by anti-metal designs, can work in complicated Industrial Metal environment; (4) UHFRFID standard unification, product highly versatile.In view of the huge application potential of UHFRFID system, the 18000-6C standard with EPCG2 compatibility is very praised highly by country, and has in succession issued relevant policies and the standard of UHFRFID.
The technology such as ultra-high frequency RFID technology and internet, wireless communication networks are merged mutually, and this makes logistics supply chain become current very popular application and research direction, is particularly suitable for tracking and the information sharing of article in global range.But at present, this technology mainly has the problem of three aspects:: the one, and label cost still cannot be reduced to the acceptable degree of all users, thereby cannot realize the sign of all article; The 2nd, RFID tag performance also cannot meet the industry requirement of some special dimension, the particularly identification to large-scale metal at present.The 3rd, every country on UHF frequency is used and disunity, makes designed label must coordinate with the read write line of appointment correctly reading out data, is unfavorable for the article identification under economical globalization tendency.Therefore, development adapt to various countries UHFRFID system correctly reading out data, meet the high-performance far Distance RFID anti-metal tag of various industry requirements, just seem very important and urgent.
Utility model content
The purpose of this utility model is to provide a kind of double frequency dual-purpose remote anti-metal RFID passive label, solved the problem that traditional uhf band passive label decipherment distance is disturbed by metal closely, easily, owing to being applicable to frequently beautiful and Ou Pin simultaneously, solved the compatibling problem between the different multiple read write line of label and model.
The technical scheme that the utility model adopts is to comprise insulation medium board, the pro and con of insulation medium board is provided with feeding network paste layer or microstrip antenna radiation a period of time, the dual-purpose anti-metal tag of double frequency side is also provided with label chip and tuning capacitance, label chip and tuning capacitance circuit are connected in parallel, and label chip and feeding network circuit are connected in series.
The electrical length of metal conductor layer of feeding network paste layer that feature of the present utility model is also to be positioned at insulation medium board pro and con is different, and a period of time on two sides can regard radiator, also can regard reflected bottom plate.The metal conductor layer of the feeding network paste layer on the insulation medium board of front can allow rfid interrogator read in U.S.'s frequency 902-928MHz frequency range, and the metal conductor layer of the feeding network paste layer on reverse side insulation medium board can allow rfid interrogator read in Ou Pin 860-868MHz frequency range.Feeding network mutually circuit connects to form loop antenna, also can not be in contact with one another the antenna that forms class pseudo-dipole.The chip of label can be placed on side, also can be placed on any one side in positive and negative, is embedded in tag body.Label chip side arranges tuning pad, and label chip circuit connects tuning pad.Front insulation medium board and reverse side insulation medium board are shaped as rectangle or circle.Front insulation medium board and reverse side insulation medium board material are polyfluortetraethylene plate or FR-4 insulcrete.Metal radiation a period of time of feeding network paste layer consists of copper or aluminium or silver powder.Label chip is chosen for the Monza4QT model chip of Impinj company, or other compatible chips.
The beneficial effects of the utility model are that anti-metal tag reads distance, are not subject to metal environmental interference, and cost is low, are applicable to frequently beautiful and Ou Pin, applied range simultaneously.
Accompanying drawing explanation
Fig. 1 is the Facad structure schematic diagram of the dual-purpose remote anti-metal RFID passive label of a kind of double frequency of the utility model;
Fig. 2 is the reverse side structural representation of the utility model label;
Fig. 3 is side structure schematic diagram of the present utility model;
Fig. 4 is the schematic diagram of the utility model label when being attached to metal object surface front and being read;
Fig. 5 is the schematic diagram of the utility model label when being attached to metal object surface reverse side and being read.
In figure, 1. insulation medium board, 2. the feeding network paste layer on the insulation medium board of front, 3. the feeding network paste layer on reverse side insulation medium board, 4. label chip, 5. tuning capacitance, 6. metal background object, 7. beautiful rfid interrogator, 8. Ou Pin rfid interrogator frequently.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.
As shown in Figure 1, Figure 2 and Figure 3, insulation medium board 1 has positive and negative two sides, on front insulation medium board 1, be provided with the feeding network paste layer 2 on the insulation medium board of front, on reverse side insulation medium board 1, be provided with the feeding network paste layer 3 on reverse side insulation medium board, insulation medium board 1 side is also provided with label chip 4 and tuning capacitance 5, label chip 4 is connected in parallel with tuning capacitance 5 circuit, and the feeding network paste layer 2 on label chip 4 and front insulation medium board, feeding network paste layer 3 circuit on reverse side insulation medium board are connected in series.Feeding network paste layer 2 on the insulation medium board of front, the metal conductor layer electrical length of the feeding network paste layer 3 on reverse side insulation medium board difference, the metal conductor layer of the feeding network paste layer 2 on front insulation medium board 1 can allow beautiful rfid interrogator 7 frequently read in U.S.'s frequency 902-928MHz frequency range, and the metal conductor layer of the feeding network paste layer 3 on reverse side insulation medium board 1 can allow Ou Pin rfid interrogator 8 read in Ou Pin 860-868MHz frequency range.Feeding network paste layer 2 on the insulation medium board of front, the feeding network paste layer 3 on reverse side insulation medium board mutually circuit connect to form loop antenna, also can not be in contact with one another the antenna that forms class pseudo-dipole.The chip 4 of label can be placed on side, also can be placed on any one side in positive and negative, is embedded in tag body.Label chip 4 sides also can arrange tuning pad, and tuning pad connects tuning capacitance 5, facilitates tuning use.Label chip 4 circuit connect tuning pad.Insulation medium board is shaped as rectangle or circle, and insulation medium board material is polyfluortetraethylene plate or FR-4 insulcrete.The metal radiation oscillator of feeding network paste layer 2 and feeding network paste layer 3 consists of copper or aluminium or silver powder.Label chip 4 is the Monza4QT model chip of Impinj company.
There is metal conductor layer on feeding network paste layer 2 on the insulation medium board of front and feeding network paste layer 3 surfaces on reverse side insulation medium board, they have served as radiation a period of time of microstrip antenna, as label antenna, by differentiation, to design, two sides can work in respectively U.S. frequency, Ou Pin rfid system.Label side is provided with RFID electronic label chip 4 and tuning capacitance 5, label chip 4 is connected in parallel with tuning capacitance 5 circuit, feeding network paste layer 2 on label chip 4 and front insulation medium board, feeding network paste layer 3 circuit on reverse side insulation medium board are connected in series, label chip 4 is cores of electronic tag, its major function has label information storage, label receives the processing of signal, the processing that label transmits and wireless power, label chip 4 costs account for 1/3rd left and right of whole electronic tag cost, external mainstream chip is of a great variety, integrated application price, technical parameter, the many factors such as technology maturity, the utility model chips model has been chosen possesses high-performance read-write capability, the Monza4QT of the Impinj company chip that is applicable to enterprise-level RFID application, reading reliability is high, and there are two completely independently antenna ports, can eliminate label blind spot, realized orientation insensitivity.Tuning capacitance 5 mainly completes the feeding network paste layer 2 on label chip 4 and front insulation medium board, the impedance matching effect between the feeding network paste layer 3 on reverse side insulation medium board, and the feeding network paste layer 2 on the insulation medium board of front, the metal conductor layer of the feeding network paste layer 3 on reverse side insulation medium board need tuning capacitance 5 to carry out resonance matching in the time of cannot be with label chip 4 conjugate impedance match.
The positive and negative two sides shape of insulation medium board 1 is all rectangle or other geometric configuratioies, and material selection is polyfluortetraethylene plate or FR-4 or other.Feeding network paste layer 2 on the insulation medium board of front, the metal conductor layer of the feeding network paste layer 3 on reverse side insulation medium board have different electrical length, make it to work in different resonance frequencies, by the principle of work of microstrip antenna, determined, its shape can be that any how much bending cablings that can extend electrical length are, guarantee the shape of the miniaturization of label antenna.Because the electrical length of the metal conductor layer microstrip antenna thickness by its substrate dielectric constant and material is determined, therefore when substrate dielectric constant is too low or need to adopt tuning capacitance 5 to regulate coupling when undersized.
As shown in Figure 4, the shorter one side of the dual-purpose anti-metal tag electrical length of double frequency is attached to metal background object 6 surfaces, and the longer one side of electrical length is over against U.S.'s rfid interrogator 7 frequently.Because read write line is operated in the frequently beautiful of 902-928MHz, now from the nearest label of read write line metal conductor layer positive, that electrical length is longer, play a major role, can realize the frequency of 902-928MHz and read, in U.S., frequent segment table reveals good decipherment distance.To the use model of the beautiful rfid interrogator 7 frequently of 902-928MHz without specific (special) requirements.
As shown in Figure 5, the shorter one side of the dual-purpose anti-metal tag electrical length of described double frequency is attached to metal background object 6 surfaces, and the longer one side of electrical length is over against Ou Pin rfid interrogator 8.Because read write line is operated in the Ou Pin of 860-868MHz, the shorter metal conductor layer of label reverse side, electrical length of now pressing close to metal background object 6 surfaces plays a major role, can realize the frequency of 860-868MHz and read, at Europe band table, reveal good decipherment distance.To the use model of the Ou Pin rfid interrogator 8 of 860-868MHz without specific (special) requirements.
The dual-purpose anti-metal tag of double frequency is designed to have different electrical length by the antenna element of the front feeding network paste layer 2 on insulation medium board, reverse side feeding network paste layer 3, makes its difference resonance in U.S.'s frequency, Ou Pin.With existing technology, compare, the dual-purpose anti-metal tag of a kind of double frequency that the utility model provides works in different frequency ranges by designing positive and negative two sides label antenna, have and both can support beautiful 902-928MHz frequently, also can support Ou Pin 860-868MHz, linear polarization, distance, the advantage such as stable and reliable for performance.The utility model has not only overcome label and on metal background object 6, has distinguished the shortcoming of near distance, and has realized two-frequency operation, is applicable to the application of country variant RFID industry.The high-gain of microstrip antenna can improve the radiation efficiency of label, good impedance matching can guarantee that the power 100% that label returns radiates effectively, high-gain design and tuning capacitance 5 designing impedance matching by microstrip antenna just can effectively improve tag sensitivity, therefore have decipherment distance far away, be not less than 10m, the advantage such as stable and reliable for performance.The utility model solved label to large-scale metal background object 6 as near bottleneck problems of decipherment distance such as coil of strip, steel billet, vehicles, and realized two-frequency operation, be applicable to the application of country variant RFID industry.Simple in structure being easy to of the present utility model made, and adopts existing parts manufacture to form, and cost is low, applied widely, and the large-scale promotion that is particularly suitable for the special industry fields such as iron and steel, metallurgy, automobile, logistics is used.
It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (8)
1. the dual-purpose anti-metal tag of double frequency, it is characterized in that: comprise insulation medium board (1), on the front of insulation medium board (1), be provided with the feeding network paste layer (2) on the insulation medium board of front, on the reverse side of insulation medium board (1), be provided with the feeding network paste layer (3) on reverse side insulation medium board, insulation medium board (1) side is also provided with label chip (4) and tuning capacitance (5), label chip (4) is connected by parallel circuit with tuning capacitance (5), feeding network paste layer (2) on label chip (4) and front insulation medium board, between feeding network paste layer (3) on reverse side insulation medium board, by series circuit, connect.
2. according to the dual-purpose anti-metal tag of a kind of double frequency shown in claim 1, it is characterized in that: the feeding network paste layer (2) on the insulation medium board of described front is different from the metal conductor layer electrical length of the feeding network paste layer (3) on reverse side insulation medium board, and a period of time on two sides can regard radiator, also can regard reflected bottom plate, the metal conductor layer of the feeding network paste layer (2) on the front insulation medium board on front insulation medium board (1) allows beautiful rfid interrogator (7) frequently read in U.S.'s frequency 902-928MHz frequency range, the metal conductor layer of the feeding network paste layer (3) on the reverse side insulation medium board on reverse side insulation medium board (1) reads in Ou Pin 860-868MHz frequency range by Ou Pin rfid interrogator (8).
3. according to the dual-purpose anti-metal tag of a kind of double frequency shown in claim 1, it is characterized in that: the feeding network paste layer (2) on the insulation medium board of described front connects to form loop antenna or is not in contact with one another the antenna that forms class pseudo-dipole with the mutual circuit of feeding network paste layer (3) on described reverse side insulation medium board.
4. according to the dual-purpose anti-metal tag of a kind of double frequency shown in claim 1, it is characterized in that: the chip of described label (4) is placed in any one side of insulation medium board (1) side or insulation medium board (1) pros and cons, or is embedded in tag body.
5. according to the dual-purpose anti-metal tag of a kind of double frequency shown in claim 1, it is characterized in that: described insulation medium board (1) is shaped as rectangle or circle.
6. according to the dual-purpose anti-metal tag of a kind of double frequency shown in claim 1, it is characterized in that: described insulation medium board (1) material is polyfluortetraethylene plate or FR-4 insulcrete.
7. according to the dual-purpose anti-metal tag of a kind of double frequency shown in claim 1, it is characterized in that: the feeding network paste layer (2) on the insulation medium board of described front, the metal radiation oscillator of the feeding network paste layer (3) on reverse side insulation medium board consist of copper or aluminium or silver powder.
8. according to the dual-purpose anti-metal tag of a kind of double frequency shown in claim 1, it is characterized in that: described label chip (4) model is Monza4QT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420114072.4U CN203759736U (en) | 2014-03-13 | 2014-03-13 | Double-frequency dual-purpose long-distance metal-resistant RFID passive tag |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420114072.4U CN203759736U (en) | 2014-03-13 | 2014-03-13 | Double-frequency dual-purpose long-distance metal-resistant RFID passive tag |
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| CN203759736U true CN203759736U (en) | 2014-08-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103839100A (en) * | 2014-03-13 | 2014-06-04 | 湖南理工学院 | Double-frequency dual-purpose remote metal-resistant RFID passive tag |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103839100A (en) * | 2014-03-13 | 2014-06-04 | 湖南理工学院 | Double-frequency dual-purpose remote metal-resistant RFID passive tag |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140806 Termination date: 20160313 |
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| CF01 | Termination of patent right due to non-payment of annual fee |