CN203630804U - UHF-RFID tag based on photovoltaic technology - Google Patents
UHF-RFID tag based on photovoltaic technology Download PDFInfo
- Publication number
- CN203630804U CN203630804U CN201320677721.7U CN201320677721U CN203630804U CN 203630804 U CN203630804 U CN 203630804U CN 201320677721 U CN201320677721 U CN 201320677721U CN 203630804 U CN203630804 U CN 203630804U
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- China
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- label
- uhf
- antenna
- photovoltaic
- photovoltaic technology
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Abstract
The utility model relates to a UHF-RFID tag based on a photovoltaic technology. The UHF-RFID tag is characterized in that: an antenna of the tag is made of photovoltaic material. Under floodlight condition irradiation, the antenna can provide auxiliary electric energy to a chip of the tag. The UHF-RFID tag based on the photovoltaic technology is characterized in that: the photovoltaic material tag antenna meets the gain index requirement of a wireless electric signal required by the tag chip, and AC impedance is matched. According to the UHF-RFID tag based on the photovoltaic technology, the UHF-RFID tag relatively possesses characteristics of an active tag under the floodlight illumination condition so that more active effect can be exerted in applications of an internet of things by the UHF-RFID tag.
Description
Technical field
The utility model relates to a kind of UHF-RFID label, relate in particular to a kind of based on photovoltaic technology, there is the UHF-RFID label of active label characteristic.
Background technology
UHF-RFID label antenna plays a key role in label and read write line data communication process.On the one hand, the chip enable circuit of label is started working, and the elect magnetic field that needs antenna to produce at read write line obtains enough energy; On the other hand, antenna has determined communication channel and the communication mode between label and read write line; The shape and size of antenna have determined that it can catch the ability of radio signal.
The designing requirement of UHF-RFID label antenna mainly comprises: the physical size of antenna is enough little, can meet the demand of label miniaturization; There is the directivity that omnidirectional or hemisphere cover; There is high-gain, the maximum signal chip to label can be provided; Impedance matching, no matter label is in what direction, and the polarization of label antenna can match with the signal of read write line.Therefore, in the time of designing antenna, major consideration has the type of antenna and the impedance of antenna.
Photovoltaic cell is the device that directly light energy conversion is become to electric energy by photoelectric effect or Photochemical effects, when light impinges upon on semiconductor p-n junction, forms new hole--electron pair.Under the effect of p-n junction electric field, hole flows to p district by n district, and electronics flows to n district by p district, after connection circuit, just forms electric current.
In fact, photovoltaic cell voltage and internal resistance, be the result of many p-n junction connection in series-parallel combinations, in the time that this battery is connected label chip, forms galvanic circle, can provide electric energy for this label chip.The photovoltaic cell that described many p-n junction connection in series-parallel are combined into, as semiconductor material, in the time that its shape and size meet the requirements, can become the antenna of UHF-RFID label equally.No matter the most important thing is whether output power of photovoltaic cell, its matched impedance is constant.
Summary of the invention
The utility model completes in view of above-mentioned technical background, and its object is to provide a kind of UHF-RFID label based on photovoltaic technology can be under floodlighting condition, relatively has the feature of active label, makes its more positive effect of performance in Internet of Things application.
The utility model provides a kind of UHF-RFID label based on photovoltaic technology, and described label comprises label chip and for receiving/launch the label antenna of wireless wave, and described label is characterised in that, described label antenna is made up of photovoltaic material.
According to an aspect of the present utility model, the described label antenna of being made up of photovoltaic material meets the gain index request of the required radio signal of label chip, and AC impedance matches.
According to another aspect of the present utility model, described photovoltaic material label antenna can be for label chip provides auxiliary electric energy under floodlighting condition.
A kind of UHF-RFID label based on photovoltaic technology described in the utility model, under floodlighting condition, label antenna can provide auxiliary electric energy for label chip, make this label in actual applications, there is better effect, for example: under floodlighting condition, the read write line operation effective range of label increases, application, the higher antijamming capability etc. of the read-write of low-power label.
Accompanying drawing explanation
Fig. 1 shows according to the structural representation of the UHF-RFID label based on photovoltaic technology of the present utility model.
Description of reference numerals:
1 ... label chip
2 ... photovoltaic material label antenna.
Embodiment
Below, with reference to accompanying drawing, the UHF-RFID label based on photovoltaic technology of the present utility model is elaborated.
Fig. 1 is the schematic diagram of a kind of UHF-RFID label based on photovoltaic technology of embodiment of the present utility model.As shown in Figure 1, photovoltaic material label antenna 2 forms the shape of closed loop, and is connected with label chip 1 conduction.
According to the general flow of designing antenna, what first should design is the shape of antenna, make the equivalent effective length of shape of antenna equal institute's radiation and acceptance electromagnetic wavelength 1/4, the same day, nemaline effective length equaled 1/4 o'clock of electromagnetic wavelength, the transmitting of antenna and to accept conversion efficiency the highest.Therefore, the length of antenna will be that wavelength decides according to the frequency of transmitted and received signal.As long as know that the centre frequency that correspondence transmits and receives just can calculate with formula below the wavelength of corresponding radio signal, then be exactly corresponding optimal antenna length by the wavelength calculating divided by 4.
Shown in Fig. 1 is the RFID label antenna working under uhf band, and this label antenna is the shape of closed loop, and its equivalent effective length is 1/4 of frequency of operation institute corresponding wavelength.Under enlightenment of the present utility model, those skilled in the art can carry out various modifications to the shape of the photovoltaic material label antenna 2 shown in the utility model according to actual conditions, to adapt to the shape of label antenna and the requirement of gain.Accompanying drawing shows a kind of embodiment of the present utility model, is not to restriction of the present utility model.
After confirming the physical form of antenna and the coupling of size conforms radio signal and gain, in the physical form and range of size of described antenna, the combination of p-n junction is arranged in design.The in the situation that of p-n junction conducting, p-n junction can be regarded as to the copper cash with definite shape and size.In the time of impedance matching, we can be considered as the combination of p-n junction the combination of the copper cash with definite shape and size.In Fig. 1, label antenna is illustrated as latticed, and each grid can represent a p-n junction, and each p-n junction is in parallel with adjacent p-n junction or connect.Each p-n junction has certain internal resistance, the series connection by p-n junction and/or be connected in parallel, and the label antenna that these p-n junctions are formed has the resistance of 50 Ω, realizes the impedance matching of label antenna and label chip.In this case, label antenna is in fact a photoelectric cell, and it can export suitable DC voltage under illumination condition, for example the DC voltage of 1 volt.
Various frameworks and conventional tags the indifference of the UHF-RFID label of being made by photovoltaic material provided by the utility model in the time of practical application, just in the situation that having light, label antenna can provide auxiliary electric energy for label chip, make this label in actual applications, have better effect, discrimination is higher.Particularly under lowered in field environment and metal background condition, make label there is better result of use.For example: under floodlighting condition, the read write line operation effective range of label increases, application, the higher antijamming capability etc. of the read-write of low-power label.
Claims (1)
1. the UHF-RFID label based on photovoltaic technology, described label forms by label chip with for the label antenna that receives/launch radiowave, and described label is characterised in that:
Described label antenna is made up of photovoltaic material.
2. the UHF-RFID label based on photovoltaic technology as claimed in claim 1, is characterized in that:
The p-n junction that described label antenna is made up of photovoltaic material forms, and the equivalent effective length of described label antenna equals 1/4 of wavelength corresponding to institute's frequency of operation.
3. the UHF-RFID label based on photovoltaic technology as claimed in claim 2, is characterized in that:
Described p-n junction parallel connection and/or series connection, form the impedance of 50 Ω, realizes the impedance matching with label chip.
4. the UHF-RFID label based on photovoltaic technology according to claim 1 and 2, is characterized in that:
Described label antenna can be at output dc voltage under illumination condition.
5. the UHF-RFID label based on photovoltaic technology according to claim 1 and 2, is characterized in that:
Described label antenna plays photronic effect under illumination condition, can provide auxiliary electric energy for label chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320677721.7U CN203630804U (en) | 2013-10-31 | 2013-10-31 | UHF-RFID tag based on photovoltaic technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320677721.7U CN203630804U (en) | 2013-10-31 | 2013-10-31 | UHF-RFID tag based on photovoltaic technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203630804U true CN203630804U (en) | 2014-06-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320677721.7U Expired - Fee Related CN203630804U (en) | 2013-10-31 | 2013-10-31 | UHF-RFID tag based on photovoltaic technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203630804U (en) |
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2013
- 2013-10-31 CN CN201320677721.7U patent/CN203630804U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIJING YULIAN XINCHENG TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: LI QIANG Effective date: 20150209 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100027 CHAOYANG, BEIJING TO: 100048 HAIDIAN, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20150209 Address after: 100048 Beijing City, Haidian District Road No. 1 Zizhuyuan Dhi Villa B block 1406 Patentee after: Beijing Yulian Xincheng Science & Technology Co., Ltd. Address before: 100027 Beijing City, Chaoyang District Xinyuan Ricci 2 Building 4 unit 51 Patentee before: Li Qiang |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140604 Termination date: 20181031 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |