CN106356613A - Tag antenna and production method thereof - Google Patents
Tag antenna and production method thereof Download PDFInfo
- Publication number
- CN106356613A CN106356613A CN201510423453.XA CN201510423453A CN106356613A CN 106356613 A CN106356613 A CN 106356613A CN 201510423453 A CN201510423453 A CN 201510423453A CN 106356613 A CN106356613 A CN 106356613A
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- China
- Prior art keywords
- type groove
- label antenna
- aerial radiation
- radiation plate
- antenna
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- 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
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- Waveguide Aerials (AREA)
Abstract
An embodiment of the invention provides a tag antenna based on radio frequency identification technology and a production method thereof; the tag antenna comprises: an antenna radiation plate, a dielectric substrate and a dielectric bottom plate; the antenna radiation plate is positioned above the dielectric substrate, and the dielectric bottom plate is positioned below the dielectric substrate, wherein the center of the antenna radiation plate is provided with a feed point and the antenna radiation plate is provided with a double-T slot.
Description
Technical field
The present invention relates to RF identification (radio frequency identification, rfid) technology, especially
It is related to a kind of label antenna based on REID and preparation method thereof.
Background technology
At present, REID is to carry out noncontact bidirectional data communication by wireless radio frequency mode, to mesh
Mark is identified and is obtained a kind of technology of related data.REID is not required to want manual intervention, is not required to
Want directly contact, do not need optical visible can complete information input and process, be operable with various severe rings
Border, recognizable high-speed moving object, and multiple objects can be identified simultaneously.Since entering 21 century, radio frequency
Technology of identification is more widely applied, and product category is also abundanter, such as active electronic label, passive electronic mark
Label and semi-passive electronic tag etc..For example, German bmw company be ensure automobile streamline each
Position can be accurately finished fittage, and radio-frequency recognition system is applied on automobile assembly line；motorola
Company adopts the automatic identification operation control system of REID, is satisfied semiconductor production for ring
The particular/special requirement in border, improve production efficiency simultaneously.
The quality of the label antenna performance design based on REID will directly determine whole RF identification system
The quality of system performance, including the reading distance of system, cost etc..Radio frequency in low frequency and high band is known at present
Other antenna technology is more ripe, and research at this stage is concentrated mainly on penetrating of hyper band and microwave frequency band
Frequency identification tag antenna technology.
In actual applications, the impedance matching between label antenna and label chip is one of key issue, good
Good impedance matching can achieve longer reading distance.From being manufactured into originally, ensureing that antenna performance is constant
In the case of it is desirable to the size of label antenna and reading and writing device antenna is little as far as possible.It is known that radio frequency is known
The manufacture of other product has to comply with the standard that user the country one belongs to and regional standard mechanism formulate, therefore standard
Diversity makes the design of product and produces more complicated and expensive.For example in Europe, REID institute
Determine hyper band (ultra-high frequency, uhf) be 866-869mhz, Japan and some
Asian countries is 952-955mhz, is 902-928mhz in South and North America, and the Ministry of Information Industry of China announces
800/900mhz frequency range REID application regulation (trying) then 800/900mhz frequency range is drawn
It is divided into two frequency ranges 840-845mhz and 920-925mhz in order to applying in radio frequency identification.Therefore, how to set
The miniaturization label antenna that meter has broadband character is a skill to be applied to the standard of country variant and area
Art is challenged.Further, since uhf band antenna is subject to environment (as metal, liquid) impact substantially, and work as
When read write line pressed close to by label, the impedance of label antenna also can produce change due to echo.Therefore, how to set
Meter label antenna has bigger bandwidth to prevent the skew of resonant frequency to be also a technical barrier.
Content of the invention
In view of this, the embodiment of the present invention provides a kind of label antenna based on REID and its preparation
Method, ensure that described label antenna has while broadband character it is adaptable to country variant and area
Rfid standard, thus reach save produce and human cost purpose.
For reaching above-mentioned purpose, the technical scheme of the embodiment of the present invention is achieved in that
The embodiment of the present invention provides a kind of label antenna, and described label antenna includes: aerial radiation plate, medium
Substrate and medium base plate；Described aerial radiation plate is located at the top of medium substrate, and described medium base plate is located at and is situated between
The lower section of matter substrate；
The center of described aerial radiation plate is provided with feed point, and has double t type grooves on described aerial radiation plate.
In such scheme, described aerial radiation plate has double t type grooves, comprising:
Have a t type groove in the lower half of aerial radiation plate, a described t type groove is cut into aerial radiation
More than the long side of plate lower half；
Have the 2nd t type groove in the first half of aerial radiation plate, described 2nd t type groove is cut into aerial radiation
The long side of the plate first half.
In such scheme, the equal length of a described t type groove and described 2nd t type groove.
In such scheme, described label antenna is changed by the length and width adjusting a described t type groove
Input impedance.
In such scheme, in whole hyper band, the return loss of described label antenna is respectively less than -10db.
In such scheme, in whole hyper band, the reading distance up to 7.58m of described label antenna.
The embodiment of the present invention also provides a kind of preparation method of label antenna, and described label antenna includes antenna spoke
Penetrate plate, medium substrate and medium base plate, described aerial radiation plate is located at the top of medium substrate, described medium
Base plate is located at the lower section of medium substrate；Methods described includes:
In aerial radiation plate center, feed point is set；
According to preset rules, double t type grooves are opened on aerial radiation plate.
In such scheme, described double t type grooves are opened according to preset rules on aerial radiation plate, comprising:
Open a t type groove in the lower half of aerial radiation plate, a described t type groove is switched to aerial radiation plate
More than the long side of lower half；
Open the 2nd t type groove in the first half of aerial radiation plate, described 2nd t type groove is directly switched to antenna spoke
Penetrate the long side of the plate first half.
In such scheme, the equal length of a described t type groove and described 2nd t type groove.
In such scheme, methods described also includes:
Adjust the length and width of a described t type groove, to change the input impedance of described label antenna.
Label antenna based on REID that the embodiment of the present invention is provided and preparation method thereof, in sky
Beta radiation plate center arranges feed point；Further, according to preset rules, double t types are opened on aerial radiation plate
Groove.So, by double t type grooves are opened on aerial radiation plate, and fed in aerial radiation plate center
Mode, ensure that designed label antenna have while broadband character it is adaptable to country variant and
The rfid standard in area, thus reach save the purpose producing with human cost.
Brief description
Fig. 1 is the composition structural representation of embodiment of the present invention label antenna；
Fig. 2 is the composition structural representation of aerial radiation plate in embodiment of the present invention label antenna as shown in Figure 1
Figure；
Fig. 3 is the simulation architecture schematic diagram of embodiment of the present invention label antenna；
Fig. 4 is the input impedance real part r of embodiment of the present invention label antennaaWith the change of t type groove length l1
Simulation curve figure；
Fig. 5 is input impedance imaginary part x of embodiment of the present invention label antennaaWith the change of t type groove length l1
Simulation curve figure；
Fig. 6 is the width w1 with a t type groove for the input impedance real part ra of embodiment of the present invention label antenna
The simulation curve figure of change；
Fig. 7 is the width w1 with a t type groove for input impedance imaginary part xa of embodiment of the present invention label antenna
The simulation curve figure of change；
Fig. 8 is directed to the input of the label antenna designed by philips test label chip for the embodiment of the present invention
Impedance plot；
Fig. 9 is the return loss plot figure for the label antenna designed by philips test label chip；
Figure 10 is the antenna pattern for the label antenna designed by philips test label chip；
Figure 11 realizes schematic flow sheet one for the preparation method of embodiment of the present invention label antenna；
Figure 12 is the reality opening double t type grooves described in the embodiment of the present invention according to preset rules on aerial radiation plate
Existing schematic flow sheet；
Figure 13 realizes schematic flow sheet two for the preparation method of embodiment of the present invention label antenna.
Specific embodiment
In embodiments of the present invention, in aerial radiation plate center, feed point is set so that passing through in aerial radiation
The mode that plate center is fed ensures the omni-directional of label antenna antenna pattern；Further, according to
Preset rules open double t type grooves on aerial radiation plate, have cut off the surface current path on original radiant panel,
Make that electric current flows through around trough rim complications and path is elongated；So, be equivalent to introducing in label antenna equivalent circuit
Cascade inductance so that the input impedance of label antenna assumes larger inductive reactance, can be presented relatively with impedance
The label chip of big condensance reaches good coupling.
Below in conjunction with the accompanying drawings and specific embodiment the present invention is further described in more detail.
Fig. 1 is the composition structural representation of embodiment of the present invention label antenna, as shown in figure 1, described label
Antenna includes aerial radiation plate 11, medium substrate 12 and medium base plate 13；Described aerial radiation plate 11 is located at
The top of medium substrate 12, described medium base plate 13 is located at the lower section of medium substrate 12.
On the basis of label antenna shown in Fig. 1, Fig. 2 is antenna spoke in embodiment of the present invention label antenna
Penetrate the composition structural representation of plate 11, as shown in Fig. 2 aerial radiation plate 11 described in the embodiment of the present invention
Center is provided with feed point 111, and has double t type grooves, described pair of t type groove bag on described aerial radiation plate
Include a t type groove 112 and the 2nd t type groove 113.
Here, described aerial radiation plate has double t type grooves, comprising: open in the lower half of aerial radiation plate
There is a t type groove 112, a described t type groove 112 is cut into more than the long side of aerial radiation plate lower half；
Have the 2nd t type groove 113 in the first half of aerial radiation plate, described 2nd t type groove 113 is cut into antenna
The long side of the radiant panel first half.
Wherein, the equal length of a described t type groove 112 and described 2nd t type groove 113.
Fig. 3 is the simulation architecture schematic diagram of embodiment of the present invention label antenna.As shown in figure 3, described label
The overall size of antenna is l × w=33mm × 25mm, in medium substrate material selection tag antenna design
Conventional fr-4 material, substrate thickness is 1.6mm, and its relative dielectric constant is εr=4.4, loss angle is just
It is cut to tan δ=0.02 it is ensured that the miniaturization of antenna and low cost.What in Fig. 3, l1 represented is out first
T type groove and the length of the 2nd t type groove, the width being out a t type groove that w1 represents, the 2nd t type
The long side of the direct cut aerial radiation plate first half of groove, therefore the width of the 2nd t type groove is fixed as 12.25mm.
The input resistance of this label antenna by changing the length and width of a described t type groove, can be conveniently adjusted
Anti- za, thus be conducive to this label antenna to carry out good coupling with the different label chip of impedance.Here,
It should be noted that due to the equal length of a described t type groove and the 2nd t type groove, so changing the
While the length of one t type groove, also can accordingly change the length of the 2nd t type groove.
Intuitively to express the length by changing a described t type groove below by way of specific simulation curve figure
To change the effect of the input impedance za of label antenna with width.
Fig. 4 is the input impedance real part r of embodiment of the present invention label antennaaWith the change of t type groove length l1
Simulation curve figure；Fig. 5 is input impedance imaginary part x of embodiment of the present invention label antennaaWith t type groove length
The simulation curve figure of l1 change.As shown in Figure 4 and Figure 5, when l1 respectively value be 21mm, 21.5mm,
22mm, between whole uhf frequency range 840～960mhz, the real part of label antenna input impedance and imaginary part
All change, with the increase of length l1 of t type groove, the real part of label antenna input impedance is equal with imaginary part
Increase.In whole uhf frequency range 840～960mhz, the real part change of the input impedance of this label antenna
About between 4.0～23.5 ohm, the imaginary part excursion of antenna feed impedance about exists scope
Between 236.3～536.9 ohm.As can be seen here, length l1 by changing t type groove can be to label antenna
Input impedance be adjusted, so that it can obtain good conjugation between the label chip of different impedances
Matching status.
Fig. 6 is the width w1 with a t type groove for the input impedance real part ra of embodiment of the present invention label antenna
The simulation curve figure of change；Fig. 7 is input impedance imaginary part xa of embodiment of the present invention label antenna with first
The simulation curve figure of the width w1 change of t type groove.As shown in Figure 6 and Figure 7, as w1, value is respectively
10mm, 11mm, 12mm, between whole uhf frequency range 840～960mhz, label antenna input resistance
Anti- real part and imaginary part all change, and with the increase of a t type groove width w1, label antenna inputs
The real part of impedance and imaginary part all increase.In whole uhf frequency range 840～960mhz, this label antenna is defeated
The real part excursion entering impedance about between 1.74～23.49 ohm, the imaginary part of label antenna input impedance
Excursion is about between 178.91～536.93 ohm.As can be seen here, by changing a t type groove
Width w1 can also be adjusted to the input impedance of label antenna, so that it can be from the mark of different impedances
Sign and obtain good conjugate impedance match state between chip.
Because the input impedance of uhf frequency range label antenna is subject to environment (metal, liquid) impact substantially, and
When read write line pressed close to by label, the impedance of label antenna also can produce change due to echo.From Fig. 4～Fig. 7
Can draw, by adjusting length l1 of t type groove and the width w1 of a t type groove, can be in very big model
Enclose the input impedance of label antenna described in the interior adjustment embodiment of the present invention.Therefore, mark described in the embodiment of the present invention
Sign antenna and there is bigger bandwidth to prevent the skew of resonant frequency, go for above scene.
For the test label chip of philips company, described label chip is in the performance impedance of 915mhz
For 11-j422 ohm, can be obtained by simulation software optimization design, work as l1=22mm, during w1=12.25mm,
Good matching status can be reached between label antenna and label chip, it is linear described in the embodiment of the present invention
Can be optimal.
Fig. 8 is directed to the input of the label antenna designed by philips test label chip for the embodiment of the present invention
Impedance plot.At 915mhz, input impedance za=12.39+j417.94 ohm of label antenna, connect
The test label chip of nearly philips company 915mhz performance impedance be 11-j422 ohm conjugation
Impedance, therefore label antenna can realize good conjugate impedance match with this label chip.And also may be used from Fig. 8
Go out, in the whole uhf frequency range 840～960mhz in the whole world, the real part excursion of antenna feed impedance is about
Between 5.17～23.45 ohm, imaginary part excursion, about between 300.63～536.93 ohm, can meet
The coupling of most uhf frequency range label chips requires.
Fig. 9 is the return loss plot figure for the label antenna designed by philips test label chip.
Thus figure is as can be seen that in the whole uhf frequency range 840～960mhz in the whole world, return loss s11 is all little
In -10db, and the corresponding s11 of minimum point 916mhz is -51.57db it is seen that label antenna and philips
The test label chip of company has reached good conjugate impedance match state.If it is different to choose some other impedance
Label chip mated with this broadband label antenna, also can obtain good matching status in this frequency range.
Figure 10 is the antenna pattern for the label antenna designed by philips test label chip.Logical
In the case of often, for making label have good readability, reduce the dependence to special placement direction, typically
Require that the antenna pattern of label antenna has good omni-directional.Thus figure can be seen that
On phi=90deg direction, this label antenna has good omni-directional, meets the application requirement of label antenna.
Using rfid label antenna apart from computing formula can calculate this label antenna theoretical maximum read distance:
Wherein λ is free space wavelength, ptFor read write line transmission power, gtFor the gain of reading and writing device antenna,
grFor the gain of label antenna, pthActivate power for label chip thresholding, χ is reading and writing device antenna and label sky
Polarization match factor between line, τ is power transmission factor.It is also seen that this label antenna from Figure 10
Greatest irradiation gain grIt is about -0.76dbi, the maximum of this label antenna can be calculated according to above formula
The theoretical distance that reads is up to 7.58m.
The new uhf frequency range rfid label antenna that can be seen that designed by the present invention from Fig. 8～Figure 10 exists
In the whole uhf frequency range 840～960mhz in the whole world, s11 is respectively less than -10db, and antenna pattern has well
Omni-directional, theoretical maximum reads distance and is 7.58m, and by adjust t type groove length l1 and
Width w1, can adjust the input impedance of this label antenna in very large range.Therefore embodiment of the present invention institute
State the diversity demand that label antenna can meet the rfid uhf frequency range in country variant and area.
Label antenna shown in corresponding Fig. 1 and Fig. 2, the embodiment of the present invention additionally provides described label antenna
Preparation method, as shown in figure 11, the preparation method of embodiment of the present invention label antenna includes:
Step s1101: feed point is set in aerial radiation plate center；
Step s1102: double t type grooves are opened on aerial radiation plate according to preset rules.
Here, it should be noted that embodiment of the present invention step s1101 and s1102's executes when not being subject to
Between sequencing restriction.
Specifically, as shown in figure 12, the embodiment of the present invention is during execution step s1102, described presses
According to preset rules, double t type grooves are opened on aerial radiation plate, comprising:
Step s1102a: open a t type groove in the lower half of aerial radiation plate, a described t type groove is cut
To more than the long side of aerial radiation plate lower half；
Step s1102b: open the 2nd t type groove in the first half of aerial radiation plate, will be straight for described 2nd t type groove
Connect the long side being switched to the aerial radiation plate first half.
Wherein, the equal length of a described t type groove and described 2nd t type groove.
As shown in figure 13 in one embodiment, the preparation method of embodiment of the present invention label antenna can also be wrapped
Include:
Step s1103: adjust the length and width of a described t type groove, to change described label antenna
Input impedance.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited to
This, any those familiar with the art the invention discloses technical scope in, can readily occur in
Change or replacement, all should be included within the scope of the present invention.
Claims (10)
1. a kind of label antenna, described label antenna includes: aerial radiation plate, medium substrate and medium base plate；
Described aerial radiation plate is located at the top of medium substrate, and described medium base plate is located at the lower section of medium substrate；Its
It is characterised by,
The center of described aerial radiation plate is provided with feed point, and has double t type grooves on described aerial radiation plate.
2. label antenna according to claim 1 is it is characterised in that have on described aerial radiation plate
Double t type grooves, comprising:
Have a t type groove in the lower half of aerial radiation plate, a described t type groove is cut into aerial radiation
More than the long side of plate lower half；
Have the 2nd t type groove in the first half of aerial radiation plate, described 2nd t type groove is cut into aerial radiation
The long side of the plate first half.
3. label antenna according to claim 2 is it is characterised in that a described t type groove and institute
State the equal length of the 2nd t type groove.
4. label antenna according to claim 3 is it is characterised in that pass through to adjust a described t
The length and width of type groove is changing the input impedance of described label antenna.
5. the label antenna according to any one of Claims 1-4 is it is characterised in that in whole superelevation
In frequency range, the return loss of described label antenna is respectively less than -10db.
6. the label antenna according to any one of Claims 1-4 is it is characterised in that in whole superelevation
In frequency range, the reading distance up to 7.58m of described label antenna.
7. a kind of preparation method of label antenna, described label antenna include aerial radiation plate, medium substrate and
Medium base plate, described aerial radiation plate is located at the top of medium substrate, and described medium base plate is located at medium substrate
Lower section；It is characterized in that, methods described includes:
In aerial radiation plate center, feed point is set；
According to preset rules, double t type grooves are opened on aerial radiation plate.
8. method according to claim 7 it is characterised in that described according to preset rules in antenna spoke
Penetrate and double t type grooves opened on plate, comprising:
Open a t type groove in the lower half of aerial radiation plate, a described t type groove is switched to aerial radiation plate
More than the long side of lower half；
Open the 2nd t type groove in the first half of aerial radiation plate, described 2nd t type groove is directly switched to antenna spoke
Penetrate the long side of the plate first half.
9. method according to claim 8 is it is characterised in that a described t type groove and described
The equal length of two t type grooves.
10. method according to claim 9 is it is characterised in that methods described also includes:
Adjust the length and width of a described t type groove, to change the input impedance of described label antenna.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510423453.XA CN106356613A (en) | 2015-07-17 | 2015-07-17 | Tag antenna and production method thereof |
| PCT/CN2016/076810 WO2016177150A1 (en) | 2015-07-17 | 2016-03-18 | Tag antenna and manufacturing method thereof, computer storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510423453.XA CN106356613A (en) | 2015-07-17 | 2015-07-17 | Tag antenna and production method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106356613A true CN106356613A (en) | 2017-01-25 |
Family
ID=57217389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510423453.XA Withdrawn CN106356613A (en) | 2015-07-17 | 2015-07-17 | Tag antenna and production method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106356613A (en) |
| WO (1) | WO2016177150A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018149247A1 (en) * | 2017-02-14 | 2018-08-23 | 中兴通讯股份有限公司 | Radio frequency identification (rfid) tag antenna and implementation method therefor |
| 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 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106654524A (en) * | 2016-12-29 | 2017-05-10 | 华侨大学 | Double-layer structured broadband UHF RFID anti-metal tag antenna |
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| CN202042595U (en) * | 2011-04-20 | 2011-11-16 | 付宇卓 | Ultrahigh-frequency radio frequency identification electronic tag antenna capable of working on metal surface |
| CN104408510A (en) * | 2014-08-27 | 2015-03-11 | 北京中电华大电子设计有限责任公司 | A plane gap label |
| CN104463309A (en) * | 2013-09-25 | 2015-03-25 | 江苏本能科技有限公司 | Ultrahigh frequency passive radio frequency identification tag used for automobile windshield |
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| US6317084B1 (en) * | 2000-06-30 | 2001-11-13 | The National University Of Singapore | Broadband plate antenna |
| CN201117799Y (en) * | 2007-11-30 | 2008-09-17 | 华南理工大学 | UHF RFID electronic label antenna possessing broad band characteristic |
| CN101783435A (en) * | 2010-04-23 | 2010-07-21 | 上海大学 | Novel three-frequency plane inverted F-shaped antenna |
| CN204375935U (en) * | 2014-12-18 | 2015-06-03 | 哈尔滨飞羽科技有限公司 | A kind of ultra-wideband antenna based on double-T shaped groove |
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2015
- 2015-07-17 CN CN201510423453.XA patent/CN106356613A/en not_active Withdrawn
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| CN202042595U (en) * | 2011-04-20 | 2011-11-16 | 付宇卓 | Ultrahigh-frequency radio frequency identification electronic tag antenna capable of working on metal surface |
| CN104463309A (en) * | 2013-09-25 | 2015-03-25 | 江苏本能科技有限公司 | Ultrahigh frequency passive radio frequency identification tag used for automobile windshield |
| CN104408510A (en) * | 2014-08-27 | 2015-03-11 | 北京中电华大电子设计有限责任公司 | A plane gap label |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018149247A1 (en) * | 2017-02-14 | 2018-08-23 | 中兴通讯股份有限公司 | Radio frequency identification (rfid) tag antenna and implementation method therefor |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016177150A1 (en) | 2016-11-10 |
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