CN105224980A - The passive UHF RFID label tag of double antenna - Google Patents
The passive UHF RFID label tag of double antenna Download PDFInfo
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- CN105224980A CN105224980A CN201510581357.8A CN201510581357A CN105224980A CN 105224980 A CN105224980 A CN 105224980A CN 201510581357 A CN201510581357 A CN 201510581357A CN 105224980 A CN105224980 A CN 105224980A
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- antenna
- label
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- dipole antenna
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Abstract
Do you the present invention relates to the passive UHF of a kind of double antenna? RFID label tag, belongs to field of radio frequency identification.Described label comprises double antenna, rectification circuit, amplifying circuit, IDS-SL900A chip; Double-antenna module comprises folded dipole antenna and bending dipole antenna, and bending dipole antenna receives RF energy and powers to label chip, and folded dipole antenna is coupled into Serial Communication by backscattering; Rectification and amplification circuit module provide burning voltage to chip, make it normally work; Described double antenna orthogonal polarization, miniaturization is to meet the requirement of label volume.The present invention comparatively passive label decipherment distance is far away, is comparatively the active label life-span long, without the need to separately adding power supply, at UHF? have a extensive future in rfid system.
Description
Technical field
The invention belongs to REID and antenna technical field, relate to the double antenna technology being suitable for passive UHFRFID label.
Background technology
RFID (radio-frequency (RF) identification) technology utilizes radiofrequency signal to carry out contactless two-way communication, automatically identifies destination object and obtain relevant information data to be successfully applied to the every field such as the manufacturing, logistic storage, communications and transportation, health care, public safety.It utilizes the Space Coupling of radiofrequency signal to realize the transmission of non-contact type data, and is reached the object identifying object by the mutual transmission of information.
In recent years, the development of RFID technique makes electronic tag demand increasing, studies more and more deep, can be divided into active label, semi-active label, passive label according to the difference of electronic label with power system.Active label and semi-active label have external battery, and the work being label chip by external battery provides energy, and its advantage has communication distance far away, can increase more circuit and function is strong; Shortcoming is that price is high, and volume is large, and the serviceable life of label is restricted, and along with the consumption of battery electric power in label, the distance of data transmission can be more and more less, the normal work of influential system.Passive label relies on the radiofrequency signal of reader to provide energy to make its work, and having the advantages such as volume is little, cost is low, the life-span is long, non-maintaining, easy to use, is the main product of RFID label tag.But the decipherment distance of passive label is but restricted, therefore, passive label is still needed to improve, to be applicable to remote identification.
For passive label, antenna, on the one hand for the work of chip provides energy, is coupled into Serial Communication by backscattering on the other hand, and remote lower chip can not be activated, and shortens decipherment distance.
The invention provides a kind of novel UHFRFID passive label, this label has double-antenna structure, Fig. 1 is antenna assumption diagram, the special received energy of antenna 1 is in order to the work of label chip, antenna 2 carries out backscattering coupled communication, this label can make up the shortcoming of passive single antenna label, fills up technological gap.
Summary of the invention
In order to realize the telecommunication of passive UHFRFID label, the invention provides a kind of double antenna passive RFID tags, described technical scheme is as follows:
The passive UHFRFID label of double antenna, comprising: double antenna (folded dipole antenna, bending dipole antenna); Rectification circuit; Amplifying circuit; Label chip IDS-SL900A.
The design of label is the combination of double antenna and label chip, and bending dipole antenna provides energy for chip, and folded dipole antenna communicates, and rectification circuit transfers alternating current to direct current, and amplifying circuit provides the voltage of steady demand for chip operation.Folded dipole antenna and bending dipole antenna orthogonal polarization, reduce the degree of coupling.Rectification, amplifying circuit adopt the combination of electric capacity and schottky diode, make alternating current become direct current and are amplified to chip required voltage.IDS-SL900A chip is UHF half passive RFID tag chip, frequency of operation 860MHz ~ 960MHz, and external power supply and antenna just can normally work, and the present invention is using bending dipole antenna and rectification amplifying circuit as the power supply of label chip.
Described double antenna adopts folded dipole antenna and bending dipole antenna two class, it is characterized in that reducing antenna size under the prerequisite ensureing normal work, meets label Miniaturization Design object.
Described rectification, amplifying circuit adopt the paster type encapsulation of schottky diode and electric capacity, inductance, not integrated, to carry out later stage measurement.
Accompanying drawing illustrates:
In order to clearer explanation inventive embodiments or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, accompanying drawing in the following describes is only one embodiment of the present of invention, for those of ordinary skill in the art, not paying under the laborious prerequisite of creation, other accompanying drawing can also be obtained with reference to the accompanying drawings.
Fig. 1 is double-antenna structure schematic diagram of the present invention;
Fig. 2 is UHFRFID Example label structures figure of the present invention.
Embodiment:
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Purport of the present invention proposes a kind of double antenna that uses to realize the communication of passive label, active label by external battery for label chip work provides energy, thus a lot of restriction is subject to, energy is obtained with separate antenna, convert RF signal to energy required for label chip, to meet the normal work of label chip.Institute's extracting method is for passive label apart from short, and the shortcomings such as the active label life-span is short, price is high have important directive significance.
Below in conjunction with accompanying drawing 1, embodiment of the present invention is described further in detail for accompanying drawing 2.
Fig. 1 is double-antenna structure schematic diagram of the present invention, and antenna 1 is bending dipole antenna, and special received energy is in order to the work of label chip, and antenna 2 is folded dipole antenna, carries out backscattering coupled communication.With reference to Fig. 1, two antennas orthogonal are placed, and make its orthogonal polarization, reduce to intercouple, work in same frequency range, do not interfere with each other.Bending dipole antenna bends continuously, and electric current has opposite phase, provides the reactance of capacitive and perception simultaneously, cancels out each other, cause the reduction of resonance frequency, thus reduces the size of antenna.The adjustment that folded dipole antenna two ends fold for impedance has very large space, and antenna 1 and antenna 2 adopt miniaturization technology, and reduce antenna size, the miniaturization for label design has a very big significance.
Fig. 2 is UHFRFID Example label structures figure of the present invention, the RF signal received is changed into energy required for label chip by rectification circuit and amplifying circuit by bending dipole antenna, folded dipole antenna is responsible for communication specially, and the two orthogonal polarization, does not interfere with each other.With reference to Fig. 2, AC conversion is become direct current with amplifying circuit by rectification circuit, and label chip carries out the aftertreatment of signal, to realize the proper communication with reader.Double antenna UHFRFID passive label comparatively passive label decipherment distance is far away, and comparatively the active label life-span is long, without the need to separately adding power supply, has a extensive future.
Further, in order to adapt to engineering design requirements, double antenna can be other types antenna, and as microstrip antenna, PIFA (planar inverted-F antenna) and other dipole antennas etc., during specific implementation, example of the present invention does not limit this.
Further, in order to make label antenna and the better impedance matching of chip, make label chip receive more energy, rectification circuit and amplifying circuit can adopt other forms, integrated or be placed in chip, and during specific implementation, example of the present invention is not restricted this.
In sum, the present invention relates to the passive UHFRFID label of a kind of double antenna, this invention will have important application in field of radio frequency identification.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of an embodiment, the invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
The foregoing is only preferred embodiment of the present invention, do not limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. the passive UHFRFID label of double antenna, comprising: double antenna (folded dipole antenna, bending dipole antenna), rectification circuit, amplifying circuit, label chip IDS-SL900A, is characterized in that:
Described label is the combination of double antenna and label chip, and antenna provides stable energy for label chip, and another antenna communicates, and the two is independent of each other.
2. according to right 1 requirement, described double antenna is bending dipole antenna and folded dipole antenna, it is characterized in that the two orthogonal polarization, be independent of each other, two antennas also can be microstrip antenna, PIFA (planar inverted-F antenna) and other dipole antennas etc.
3. according to right 1 requirement, described rectification circuit and amplifying circuit are chip exterior circuit, it is characterized in that building of electric capacity and schottky diode, and other electron devices also can be used integrated or be placed in chip.
4. according to right 1 requirement, described UHF half passive RFID tag chip is IDS-SL900A chip, it is characterized in that only needing external power supply and antenna just can normally work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510581357.8A CN105224980A (en) | 2015-09-10 | 2015-09-10 | The passive UHF RFID label tag of double antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510581357.8A CN105224980A (en) | 2015-09-10 | 2015-09-10 | The passive UHF RFID label tag of double antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105224980A true CN105224980A (en) | 2016-01-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510581357.8A Pending CN105224980A (en) | 2015-09-10 | 2015-09-10 | The passive UHF RFID label tag of double antenna |
Country Status (1)
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| CN (1) | CN105224980A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108596322A (en) * | 2018-06-11 | 2018-09-28 | 上海双十信息科技有限公司 | A kind of ultrahigh frequency RFID device and method of label independence energy supply |
| CN112382852A (en) * | 2020-11-20 | 2021-02-19 | 深圳市德兴达科技有限公司 | Electronic equipment and double-antenna energy acquisition device |
-
2015
- 2015-09-10 CN CN201510581357.8A patent/CN105224980A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108596322A (en) * | 2018-06-11 | 2018-09-28 | 上海双十信息科技有限公司 | A kind of ultrahigh frequency RFID device and method of label independence energy supply |
| CN108596322B (en) * | 2018-06-11 | 2023-12-15 | 上海双十信息科技有限公司 | Ultrahigh frequency RFID device and method with independent energy supply of labels |
| CN112382852A (en) * | 2020-11-20 | 2021-02-19 | 深圳市德兴达科技有限公司 | Electronic equipment and double-antenna energy acquisition device |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160106 |