CN106981722A - A kind of flexible anti-metal RFID label antenna - Google Patents
A kind of flexible anti-metal RFID label antenna Download PDFInfo
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- CN106981722A CN106981722A CN201710323853.2A CN201710323853A CN106981722A CN 106981722 A CN106981722 A CN 106981722A CN 201710323853 A CN201710323853 A CN 201710323853A CN 106981722 A CN106981722 A CN 106981722A
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- 239000002184 metal Substances 0.000 title claims abstract description 57
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 57
- 239000000758 substrate Substances 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 26
- 230000005855 radiation Effects 0.000 claims abstract description 24
- 229920002521 macromolecule Polymers 0.000 claims abstract description 7
- 238000010276 construction Methods 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 238000005452 bending Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 238000013461 design Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000002372 labelling Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000010415 tropism Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
- H01Q1/2225—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
Landscapes
- Details Of Aerials (AREA)
Abstract
The invention discloses a kind of flexible anti-metal RFID label antenna.It includes the medium substrate being made up of pcb board material, synthetic paper material or macromolecule polymeric material, the radiation patch for being arranged on the preceding surface of medium substrate and the metal floor for being arranged on surface after medium substrate, the area of radiation patch is less than the area of medium substrate, the area of metal floor is suitable with the area of medium substrate, rectangular channel and the U-type groove positioned at rectangular channel periphery are offered in radiation patch, the rectangular groove of radiation patch is connected with label chip.It the advantage is that：Simple in construction, processing assembling is easy, with thickness of thin, flexible conformal, anti-metal, reading apart from it is remote the features such as, flexible anti-metal performance is very good, and medium board selection macromolecule polymeric material, label cost is low；The structure makes the lobe width of label antenna wider, and the read range of label antenna is larger, is easy to the reading and identification of label, can be widely used in every field, can be with the application of further genralrlization RFID label antenna.
Description
Technical field
The present invention relates to a kind of label antenna, specifically a kind of flexible anti-metal RFID label antenna belongs to electronics
Wireless communication technology field.
Background technology
REID RFID is a kind of automatic identification technology, and it carries out data by using radiofrequency signal and energy is passed
It is defeated, so as to complete contactless automatic identification；RFID system generally comprises label and read write line, and some is identified by label
Object, read write line reads the identification of the information and then completion that are stored on label to article by radiofrequency signal.It is relative with it is current
Wide variety of planar bar code technology, RFID has that reading rate is fast, read that distance is remote, information capacity is big, security performance is high, support
Fast reading and writing, without human visual with without it is artificial on duty the advantages of.The forms such as the information sharing by internet, RFID can
To realize the shared and tracking of Item Information in global range, therefore, it can be stated that RFID is the foundation stone of Internet of Things.
RFID technique has widely in various fields such as production and transport, merchandise controls in various aspects such as industry, business
Using with huge development prospect.Current, the topmost applications of RFID specifically include access control, tracking of products, stream tube
In terms of reason, intelligent commodity shelf, anti-tamper security, medical instrument management.Although at present RFID calculate quickly grow, not enough into
It is ripe.Mainly also there are problems that following two aspect at present：One is label Cost Problems, although common label cost than relatively low,
But for special applications, the label on metal and particular form article is such as applied, its cost is higher, it is impossible to realize all
The singular id of article；On the other hand it is that in RFID applications, tag performance is not met by a lot in specific dimensions, specific shape
Application demand under formula, this also counteracts that RFID popularization and application.
In numerous RFID application, the label used in metal or the preferable material of electric conductivity or body surface has
Very big demand.Influence due to metal to label antenna, when common label is placed on metal surface, the reading distance meeting of label
Greatly reduce or even can not be read, there is more research and design to anti-metal tag antenna at present, but mostly all volume it is big,
Cost is high, and is usually to be made of the thicker hard material of thickness, but in actual applications, many times needs to mark
Label are pasted onto curved object surface, but flexible label is non-anti-metal tag mostly at present, and these labels but cannot be used in
The surfaces such as bending metals object such as steel cylinder.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of small volume, cost is low and reads and the high flexibility of accuracy of identification
Anti-metal RFID label antenna.
In order to solve the above-mentioned technical problem, flexible anti-metal RFID label antenna of the invention, including by pcb board material, conjunction
The medium substrate that web-forming material or macromolecule polymeric material are made, is arranged on radiation patch and the setting on the preceding surface of medium substrate
The metal floor on surface after medium substrate, the area of radiation patch is less than the area of medium substrate, the area of metal floor with
The area of medium substrate quite, offers rectangular channel and the U-type groove positioned at rectangular channel periphery in radiation patch, radiation patch
Rectangular groove is connected with label chip.
The dielectric constant of the medium substrate is 2.2, loss tangent 0.001, and the size of the medium substrate is 98*28*
0.5mm3。
The size of the radiation patch is 93*23mm2。
The advantage of the invention is that：The flexible anti-metal RFID label antenna is by medium substrate, radiation patch and metal
Floor three-decker is constituted, and the upper rectangular channel set and U-type groove, can effectively reduce the chi of label antenna in radiation patch
Very little, radiation patch size is more slightly smaller than label sizes；The metal floor at its back side, both can effectively reduce metal use environment label
The influence of antenna performance can improve the gain of label antenna again, so as to increase the reading distance of label antenna, label antenna exists
Metal object surface performance is better than nonmetallic surface；Its is simple in construction, and processing assembling is easy, with thickness of thin, it is flexible it is conformal,
Anti-metal, read apart from it is remote the features such as, flexible anti-metal performance is very good, and medium sheet material can select macromolecule polymeric material, mark
Sign cost low；The other structure design make it that the lobe width of label antenna is wider, and the read range of label antenna is larger, is easy to
The reading and identification of label, can be widely used in every field, can be with the application of further genralrlization RFID label antenna.
Brief description of the drawings
Fig. 1 is the main structure diagram of the flexible anti-metal RFID label antenna of the present invention；
Fig. 2 is the overlooking the structure diagram of the flexible anti-metal RFID label antenna of the present invention；
Fig. 3 is the warp architecture view of the flexible anti-metal RFID label antenna of the present invention；
S11 is lost for the reflection coefficient of port of the flexible anti-metal RFID label antenna of the present invention in Fig. 4
Fig. 5 is 920MHz label antenna directional diagrams in the present invention
Fig. 6 is 920MHz label antennas in the present invention in metal surface directional diagram
Fig. 7 arrives metal surface directional diagram for 920MHz label antennas in the present invention are conformal
Fig. 8 is tag read distance in the flexible anti-metal RFID label antenna of the present invention with frequency variation diagram.
Embodiment
The embodiment and advantage of the present invention is described in detail by accompanying drawing and example.It should be understood that of the invention
Various change can be carried out according to the example, its change is neither departed from the scope of the present invention.Further, the present embodiment explanation
And brief description of the drawings is introduces explanation embodiment of the present invention, rather than the limitation present invention, below in conjunction with the accompanying drawings, to the present invention's
Tag antenna structure and result are described in detail.
The flexible anti-metal RFID label antenna of the present invention, including by pcb board material, synthetic paper material or high molecular polymerization material
Expect the medium substrate 1 being made, be arranged on the radiation patch 2 on the preceding surface of medium substrate 1 and be arranged on surface after medium substrate
Metal floor 3, the area of radiation patch 2 is less than the area of medium substrate, the area of metal floor 3 and the area phase of medium substrate
When offering rectangular channel 4 and the U-type groove 5 positioned at the periphery of rectangular channel 4 in radiation patch 1, the rectangular channel and U-type groove structure are set
Meter can make the surface current formation meander structure of antenna, so as to reduce the size of label antenna, meanwhile, U-type groove gap
So that paster produces coupled structure, larger inductance value is formed, to complete the impedance matching of label antenna；The rectangle of radiation patch
Label chip 6 is connected with groove 4, label chip is welded at square type and groove radiation patch rim openings so that label chip two
Pin formation difference current, meets its job requirement.
In addition, label antenna overall dimensions are mainly related to dielectric material dielectric constant, in this example, from medium material
Expect for F4B sheet materials, the dielectric constant of medium substrate 1 is 2.2, loss tangent 0.001, the size of medium substrate 1 is 98*28*
0.5mm3, the sheet material can carry out certain bending in 0.5mm thickness, and the size of radiation patch 2 is 93*23mm2。
Wherein, as Figure 1-Figure 2, it is necessary to flexible sheet be selected, such as ultra-thin pcb board material, synthesis in specific design
The macromolecule polymeric material such as paper material or PET, PVC can as label antenna medium substrate, flexible sheet or ultra-thin PCB
Sheet material so that label antenna can be bent and conformal to body surface, from above-mentioned medium sheet material or macromolecule polymeric material, be damaged
The small, price of consumption is relatively inexpensive and can arrive metal object surface with conformal, realizes flexible anti-metal performance.
Structural representation when Fig. 3 is label antenna bending of the present invention or is conformal, by humorous when label antenna of the invention is bent
The long side of vibration frequency carries out circular arc bending, and change does not influence the broadside of label by bending, and the length L of circular arc is the length of label antenna
Degree, angle, θ is the angle of equivalent circle centre position label bow, therefore has 0 °≤θ≤360 °, and 0 ° is equivalent redius R ∝ ∞, can be
Row bending, 360 ° are that label antenna is just bent to a circle.In general, label antenna performance can be by during label bow
To certain influence, the label antenna of the invention performance change at angle of bend θ≤100 ° is smaller, and label is impacted smaller,
Label remains to normal work.
Fig. 4 is the return loss S11 of this example antenna port results, it can be seen that label antenna is in metal and nonmetallic
Antenna return loss is substantially unaffected during surface, and label antenna has preferable anti-metal performance.In the figure, label antenna
Bending and conformal object are the metal and nonmetallic cylinder that bending radius is 100mm, 60 ° of angle of bend θ ≈, it can be seen that
Bend the impedance matching to label antenna to have a certain impact, it is contemplated that the frequency hopping operation principle of label antenna, the frequency deviation
Reading on label influences very little.
Fig. 5-Fig. 7 is directional diagram of this example label antenna in 920MHz.Fig. 5 is that label antenna is located at nonmetallic surface
Directional diagram, Fig. 6 is directional diagram when label antenna is located at metal surface, and Fig. 7 is that the conformal radius that arrives of label antenna is 100mm metals
Directional diagram during periphery.When label antenna is located at nonmetallic surface, antenna positive and negative has larger radiation, works as mark
When signing antenna positioned at metal surface, label antenna is mainly radiated to poincare half plane.On the whole, label antenna has preferable side
Tropism, because label antenna lobe width is wider, label has larger read range.
The gain of label antenna of the present invention and the loss of medium substrate are closely related.Because label chip is the big electricity of small resistor
The reason for appearance, theoretical according to conjugate impedance match, label antenna impedance needs to be designed to the big inductance of small resistor.Due to label antenna resistance
Very little, dielectric loss influences very big to antenna efficiency, therefore the gain effects to label antenna are also very big.For specific design, examine
On the premise of considering application demand and cost requirement, it is designed from suitable medium substrate.In this example, label antenna exists
The gain of nonmetallic label is -3.6dBi, and the gain in metal surface reaches 1.8dBi, and label antenna has higher gain.
For label antenna, its maximum read distance can be calculated with formula (1).
Wherein, PtFor reading and writing device antenna transmission power；
GtFor read write line transmitter antenna gain (dBi)；
GrFor label receiving antenna gain；
PrFor the receiving power (minimum unlatching power) of label；
Pth=Pr* τ is the reading sensitivity of label chip, and τ is power transmission factor.
P is polarization match factor, index label antenna polarization and reading and writing device antenna polarization matching state；
EIRP=PtGt, EIRP (Effective Isotropic Radiated Power) is EIRP,
If Chinese Industrial Standards (CIS) regulation EIRP is 33dBm (2W).
As can be seen that the gain of the level of impedance match of label antenna and label chip, label antenna, labeling task wavelength
And label chip sensitivity can influence label antenna to read distance.Chip sensitivity is signed not by the shadow of tag antenna design
Ring, the change of labeling task frequency is smaller, influence of the operation wavelength change to tag read distance can be ignored substantially, therefore label day
Line and the influence that label chip level of impedance match, label antenna gain signature read distance are larger.
The label antenna maximum read distance of table 1 is measured
Table 1 is maximum read distance test of the present example label antenna in the range of different operating situation different frequency
Results, it can be seen that label antenna metal surface maximum read distance more than 3m, far above the reading in nonmetallic surface
Distance, the anti-metal of label antenna is functional.When label antenna bending or it is conformal arrive metal object surface when, its maximum read
Distance and during for bending change it is little, label antenna has preferably bending and conformal performance.
Fig. 8 is that the maximum read distance of present example label antenna changes with frequency, it can be seen that label antenna is theoretical
Relatively it is coincide with actual maximum read distance, label antenna reads distant.
Based on the present invention, the examples such as the ultrathin flexible anti-metal tag antenna that thickness is 0.25mm are also designed, it still has
Have preferable performance, by actual test, metal surface maximum read distance more than 2m, meet it is most it is actual should
With.Label antenna designed by the present invention has the low feature of thickness of thin, cost, and with reading distance farther out and preferably
Anti-metal performance, label antenna bend it is conformal after also have preferable performance.
By it was verified that the flexible anti-metal RFID label antenna of the present invention can be operated in Chinese UHF RFID work
Frequency range 920MHz-925MHz and North America UHF RFID working frequency range 902MHz-928MHz.
In summary, the only explanation and result of example of the present invention, should be the invention is characterized in that based on should
The invention of label antenna type, it is any to be changed and adjust in the right and instance basis of application claims scope
The label antenna designed is in scope of the presently claimed invention.
Claims (3)
1. a kind of flexible anti-metal RFID label antenna, it is characterised in that：Including by pcb board material, synthetic paper material or macromolecule
The medium substrate that polymeric material is made（1）, it is arranged on medium substrate（1）The radiation patch on preceding surface（2）And it is arranged on medium
The metal floor of substrate rear surface（3）, the radiation patch（2）Area be less than medium substrate area, the metal floor
（3）Area it is suitable with the area of medium substrate, the radiation patch（1）On offer rectangular channel（4）And positioned at rectangular channel
（4）The U-type groove of periphery（5）, the rectangular channel of the radiation patch（4）Place is connected with label chip（6）.
2. according to the flexible anti-metal RFID label antenna described in claim 1, it is characterised in that：The medium substrate（1）'s
Dielectric constant is 2.2, loss tangent 0.001, the medium substrate（1）Size be 98*28*0.5mm3。
3. according to the flexible anti-metal RFID label antenna described in claim 1, it is characterised in that：The radiation patch（2）'s
Size is 93*23mm2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710323853.2A CN106981722A (en) | 2017-05-10 | 2017-05-10 | A kind of flexible anti-metal RFID label antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710323853.2A CN106981722A (en) | 2017-05-10 | 2017-05-10 | A kind of flexible anti-metal RFID label antenna |
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| Publication Number | Publication Date |
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| CN106981722A true CN106981722A (en) | 2017-07-25 |
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| CN201710323853.2A Pending CN106981722A (en) | 2017-05-10 | 2017-05-10 | A kind of flexible anti-metal RFID label antenna |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107480756A (en) * | 2017-08-11 | 2017-12-15 | 成都德杉科技有限公司 | A kind of antenna design method of flexible anti-metal tag |
| CN107545298A (en) * | 2017-08-11 | 2018-01-05 | 电子科技大学 | A kind of flexible anti-metal tag |
| CN107706534A (en) * | 2017-11-16 | 2018-02-16 | 上海龙华汽车配件有限公司 | A kind of Conformal Microstrip Antennas |
| CN110365370A (en) * | 2018-03-26 | 2019-10-22 | 恩智浦有限公司 | Near field communication means |
| CN110768002A (en) * | 2019-10-15 | 2020-02-07 | 广东思谷智能技术有限公司 | Anti-metal radio frequency identification tag antenna |
| CN110909850A (en) * | 2019-12-04 | 2020-03-24 | 江苏硕贝德通讯科技有限公司 | Low-profile RFID temperature measurement label |
| CN111079886A (en) * | 2019-12-04 | 2020-04-28 | 江苏嘉华通讯科技有限公司 | RFID anti-metal temperature measurement label |
| CN111079885A (en) * | 2019-12-04 | 2020-04-28 | 江苏嘉华通讯科技有限公司 | RFID profiling anti-metal temperature measurement label |
| CN112164861A (en) * | 2020-08-24 | 2021-01-01 | 南京航空航天大学 | Miniaturized foldable ultrahigh-frequency anti-metal anti-liquid tag antenna |
| CN112313669A (en) * | 2018-05-03 | 2021-02-02 | 斯马特拉克投资有限公司 | Flexibly-mountable L-shaped RFID tag antenna |
| CN112397874A (en) * | 2020-10-30 | 2021-02-23 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Radio frequency identification RFID anti-metal microstrip tag antenna |
| WO2023000509A1 (en) * | 2021-07-19 | 2023-01-26 | 福州大学 | Double-sided anti-metal miniaturized rfid tag antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107545298A (en) * | 2017-08-11 | 2018-01-05 | 电子科技大学 | A kind of flexible anti-metal tag |
| CN107545298B (en) * | 2017-08-11 | 2019-11-26 | 电子科技大学 | A kind of flexibility anti-metal tag |
| CN107480756A (en) * | 2017-08-11 | 2017-12-15 | 成都德杉科技有限公司 | A kind of antenna design method of flexible anti-metal tag |
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| CN107706534A (en) * | 2017-11-16 | 2018-02-16 | 上海龙华汽车配件有限公司 | A kind of Conformal Microstrip Antennas |
| CN110365370A (en) * | 2018-03-26 | 2019-10-22 | 恩智浦有限公司 | Near field communication means |
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| CN112313669A (en) * | 2018-05-03 | 2021-02-02 | 斯马特拉克投资有限公司 | Flexibly-mountable L-shaped RFID tag antenna |
| US11625568B2 (en) | 2018-05-03 | 2023-04-11 | Avery Dennison Retail Information Services Llc | Flexible mountable L-shaped RFID tag antenna |
| CN112313669B (en) * | 2018-05-03 | 2023-01-31 | 斯马特拉克投资有限公司 | Flexibly-mountable L-shaped RFID tag antenna |
| CN110768002B (en) * | 2019-10-15 | 2022-04-29 | 广东思谷智能技术有限公司 | Anti-metal radio frequency identification tag antenna |
| CN110768002A (en) * | 2019-10-15 | 2020-02-07 | 广东思谷智能技术有限公司 | Anti-metal radio frequency identification tag antenna |
| CN111079885A (en) * | 2019-12-04 | 2020-04-28 | 江苏嘉华通讯科技有限公司 | RFID profiling anti-metal temperature measurement label |
| CN111079886A (en) * | 2019-12-04 | 2020-04-28 | 江苏嘉华通讯科技有限公司 | RFID anti-metal temperature measurement label |
| CN110909850A (en) * | 2019-12-04 | 2020-03-24 | 江苏硕贝德通讯科技有限公司 | Low-profile RFID temperature measurement label |
| CN112164861B (en) * | 2020-08-24 | 2021-09-17 | 南京航空航天大学 | Miniaturized foldable ultrahigh-frequency anti-metal anti-liquid tag antenna |
| CN112164861A (en) * | 2020-08-24 | 2021-01-01 | 南京航空航天大学 | Miniaturized foldable ultrahigh-frequency anti-metal anti-liquid tag antenna |
| CN112397874A (en) * | 2020-10-30 | 2021-02-23 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Radio frequency identification RFID anti-metal microstrip tag antenna |
| WO2023000509A1 (en) * | 2021-07-19 | 2023-01-26 | 福州大学 | Double-sided anti-metal miniaturized rfid tag antenna |
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Application publication date: 20170725 |