CN109713427A - A kind of ultrathin flexible UHF RFID anti-metal tag antenna - Google Patents
A kind of ultrathin flexible UHF RFID anti-metal tag antenna Download PDFInfo
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- CN109713427A CN109713427A CN201811449715.XA CN201811449715A CN109713427A CN 109713427 A CN109713427 A CN 109713427A CN 201811449715 A CN201811449715 A CN 201811449715A CN 109713427 A CN109713427 A CN 109713427A
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Abstract
The present invention provides a kind of ultrathin flexible UHF RFID anti-metal tag antennas, comprising: label protective layer, chip, antenna stack, the substrate layer being from top to bottom successively bonded are constituted；Antenna stack includes two funtion parts of the radiating element being sequentially etched out from left to right and metal base plate, and centre is connected with connecting line；The radiation patch is connected in conjunction with the small ring feed structure of electricity, and through asymmetrical connecting line by primary radiation piece；Bending slot has been opened up on the metal base plate.This flexibility UHF RFID anti-metal tag can efficiently adjust label antenna impedance by adjusting the locations of structures of the small ring of electricity and asymmetric connection line, to reach and the matched purpose of chip impedance.The configuration of the present invention is simple, selection are universal, low in cost, and can be applied to metal plate, a variety of curved surface component surfaces and round tube product, and do not influenced by metal material, have wider production applicability.
Description
Technical field
The present invention relates to radio frequency identification sensory field more particularly to a kind of ultrathin flexible UHF RFID anti-metal tags.
Background technique
In recent years, Radio Frequency Identification Technology (radio frequency identification, RFID) due to it is wireless,
Sourceless characteristic receives manufacturing industry, logistics, the extensive favor for supervising detection field, is had been achieved at present in production and logistics progress
In product tracking function.Wherein, the electronic tag in RFID system is mainly by antenna stack, dielectric matrix layer and protective layer structure
At.Wherein becomes increasingly complex and minimize along with the structure of object to be identified, it is more next to the label requirements being attached on product
It is bigger.Maximum problem is that antenna stack and chip component are attached to rigid Jie to the electronic tag of the prior art in use
On matter layer, label is caused not have curved function, is unable to satisfy bending and the biggish installation requirements of curvature, such as metal
The scenes such as pipe, human or animal's body, constrain the development of electronic tag.
Secondly as label is located in different materials, larger fluctuation can occur for performance.In particular for current application
Most wide metal environment, has been proposed a variety of settling modes in the recent period, such as folded dipole, absorbing material, EBG/AMC structure
Deng.The cost of the label made is improved, is unfavorable for electronics by the use of these anti-metal modes such as special material and antenna structure etc.
The volume production of label.
Finally, due to which tag performance requires that the complex impedance of antenna and chip is needed to match, cause many adjustings occurred
The antenna type of impedance, such as T-type matching, damascene structures, manifold type structure.But these types are usual in adjustment process
Along with the variation of the frequency of use of antenna, cause adjustment process more complicated cumbersome, is unfavorable for the efficient progress of Antenna Design.
The variation of part-structure can also make the overall size of label change simultaneously, be unfavorable for the miniaturization of label.
In recent years, having had already appeared the concept and achievement of some flexible anti-metal tags, such as Patent No.
201310269671.3 flexible ultrahigh-frequency anti-metal electronic tag；And the anti-gold of flexibility of Patent No. 201320329575.9
Belong to uhf band RFID label tag etc.；Although these achievements have carried out improvement to a certain extent to traditional label, there are still
The disadvantage that structure is complex, material selection is special, at high cost is unfavorable for the batch making production of anti-metal tag.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of flexibility UHF RFID anti-metal tags, which is characterized in that packet
The label protective layer being from top to bottom successively bonded, chip, antenna stack, substrate layer is included to constitute；The substrate layer includes from top to bottom
The first layer dielectric layer and second layer dielectric layer being successively bonded, first layer dielectric layer are bonded with the antenna stack, second layer medium
Layer is located at first layer dielectric layer and bends in U-shaped space.
Preferably, this flexibility UHF RFID anti-metal tag further includes protective layer, label chip described in protective layer, protective layer
Coated on antenna stack, the material of protective layer is ink.
Preferably, label chip and the antenna stack are fixed by reverse packaging process.
Preferably, antenna stack is machined on first layer dielectric layer, and antenna stack includes the radiation being sequentially etched out from left to right
Two funtion parts of unit and metal base plate, centre are connected with connecting line.
Preferably, the radiating element of antenna stack is made of primary radiation piece and electric small ring structures；Electric small ring structures are embedded into master
In radiation fin, the two is connected by non-centrosymmetrical connecting line；U-type groove is opened to increase antenna surface in primary radiation on piece simultaneously
Flow path length.
Preferably, the radiating element length of antenna stack is 56mm, width 20-21mm.
Preferably, the electric small ring structures length of antenna stack is 16-16.5mm, width 8-8.5mm.
Preferably, the asymmetric connection line between the primary radiation piece of antenna stack and electric small ring structures is located at electric small ring structures
Bottom edge and the right, line width and the small loop wire of electricity are wide consistent.
Preferably, the connecting line positioned at the right of antenna stack can be carried out left in the ratio of electric small ring structures width edge length
It moves；
Preferably, the metal base plate function part of antenna stack has separated sinuous slot, to increase label gain.
Preferably, the sinuous slot part of the metal base plate of antenna stack, width direction short side are 12-12.5mm, and long side is
15.6-16.1mm；Length direction is 11.2.75-11.5mm.
Preferably, the material of antenna stack and metal base plate layer is copper or aluminium, is compounded in the antenna using etching technics
On the first layer dielectric layer, the antenna stack with a thickness of 10-16um.
Preferably, first layer dielectric layer is thin polymer film, and the material of the thin polymer film includes polyimides or gathers
Ethylene glycol terephthalate, the second layer dielectric layer are foam medium layer, the first layer dielectric layer and the second layer
Dielectric layer is bonded using gum.
Preferably, first layer dielectric layer with a thickness of 50-125um, length is between 112.6-113.25mm, width 20-
21mm；The thickness of second layer dielectric layer is between 0.5-1mm, length 56mm, width 20-21mm.
Preferably, flexible UHF RFID anti-metal tag is Nian Jie using adhesive sticker with metal component.
On the other hand, the present invention also provides the designs and authentication of a kind of flexibility UHF RFID anti-metal electronic tag
Method, comprising:
S1, optimize the material for determining the flexibility UHF RFID anti-metal tag using electromagnetic simulation software HFSS or CST
And optimized parameter, and make the flexibility UHF RFID anti-metal tag；
S2, Tagformance reader is connect with the flexibility UHF RFID anti-metal tag and acquires the flexibility
The performance parameter of UHF RFID anti-metal tag, until the flexibility UHF RFID anti-metal tag obtains optimal reading distance simultaneously
Read information.
The present invention provides a kind of ultrathin flexible UHF RFID anti-metal tags, and flexibility UHF RFID anti-metal tag is simultaneously
It is not influenced using particular form shielding metal, but uses microstrip antenna structure, using metal component prolonging as metal base plate layer
It stretches, to eliminate interference of the metal to antenna equivalent circuit, so that the information of flexibility UHF RFID anti-metal tag can be normal
Read-write；Meanwhile it devising one kind and can effectively adjust impedance-matching coefficient in the case where antenna is almost unchanged using frequency point
Antenna structure can efficiently complete the Antenna Design work of specific frequency of use.This flexibility UHF RFID anti-metal tag
Structure is simple, selection is universal, low in cost, and can be applied to metal plate, a variety of curved surface component surfaces and round tube product,
And do not influenced by metal material, there is wider production applicability.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of ultrathin flexible UHF RFID anti-metal tag of the present invention；Wherein, 1 is chip；
2 be label protective layer；3 be antenna stack；4 be substrate layer, and 41 be first layer dielectric layer, and 42 be second layer dielectric layer；
Fig. 2 is the antenna stack specific structure of ultrathin flexible UHF RFID anti-metal tag of the invention；
Transmission system when Fig. 3 is parameter k variation in the antenna structure of ultrathin flexible UHF RFID anti-metal tag of the invention
Several variation diagrams.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
Embodiment 1
A kind of flexibility UHF RFID anti-metal tag, including label protective layer 2, the label chip being from top to bottom successively bonded
1, antenna stack 3, substrate layer 4 are constituted；The substrate layer includes first layer dielectric layer 41 and second layer dielectric layer 42, first layer medium
Layer is U-shaped structure open at one end and is bonded with the antenna stack 3 that second layer dielectric layer 42 is located at first layer dielectric layer bending U
In type space, the label chip 1 and the antenna stack 3 are fixed by reverse packaging process.
The first layer dielectric layer 41 is thin polymer film, and the material of the thin polymer film includes polyimides or poly- pair
Ethylene terephthalate, the second layer dielectric layer 42 are foam medium layer, the first layer dielectric layer 41 and described second
Layer dielectric layer 42 is bonded using gum, further includes protective layer, and the protective layer wraps up the label chip 1, and the protective layer applies
It overlays on the antenna stack 3, the material of the protective layer is ink.
The first layer dielectric layer with a thickness of 50-125um, length 112.6-113.25mm, width 20-21mm；Institute
State the thickness 0.5-1mm of second layer dielectric layer, length 56mm, width 20-21mm.
The antenna stack 3 is machined on first layer dielectric layer 41, and antenna stack 3 includes the radiation being sequentially etched out from left to right
Two funtion parts of unit and metal base plate, centre are connected with connecting line, the radiating element of the antenna stack 3 by primary radiation piece and
Electric small ring structures are constituted；Electric small ring structures are embedded into primary radiation piece, and the two is connected by non-centrosymmetrical connecting line, asymmetric
Connecting line is located at electric small ring structures bottom edge and the right, and line width and the small loop wire of electricity are wide consistent；U is opened in primary radiation on piece simultaneously
Type groove is to increase the flow path length of antenna surface.
The radiating element length of the antenna stack 3 is 56mm, width 20-21mm, the electric small ring structures of the antenna stack 3
Length is 16-16.5mm, width 8-8.5mm.
The connecting line that antenna stack 3 is located at the right can be moved to left in the ratio of electric small ring structures width edge length, it is mobile away from
It is 0-0.5 from the proportional region for accounting for width edge length.
The metal base plate function part of the antenna stack has separated sinuous slot, to increase label gain, the gold of the antenna stack
Belong to the sinuous slot part of bottom plate, width direction short side is 12-12.5mm, long side 15.6-16.1mm；Length direction is
11.275-11.5mm。
The material of the antenna stack 3 and metal base plate layer is copper or aluminium, and the antenna is compounded in institute using etching technics
State on first layer dielectric layer 41, the antenna stack with a thickness of 10-16um.
It is described it is characterized in that, flexible UHF RFID anti-metal tag and metal component are Nian Jie using adhesive sticker.
The structural schematic diagram of label of the present invention is as shown in Figure 1, its overall size is 56 × 20 × 0.6mm3。
Chip 1 uses the Monza R6 chip of Impinj company, and material used in protective layer 2 is ink, coating
On antenna stack 3, prevent antenna conductor from aoxidizing, antenna conductor used in antenna stack 3 is copper, by copper direct combination to first layer
Medium --- on Kapton, and made of etching technics, conductor thickness 15um.
The design parameter of antenna stack 3 is as shown in table 1:
1 antenna stack design parameter (mm) of table
For chip 1 in conjunction with the antenna conductor reverse packaging process of antenna stack 3, the first layer dielectric layer 41 of substrate layer is 50um's
(PI, dielectric constant 3.5, loss tangent angle are 0.08) and to be bent into the shape for having U-shaped interior cavity groove to Kapton
Shape；Meanwhile in the inner cavity design use 42 foam medium layer of second layer medium (dielectric constant 1.12, with a thickness of
0.5mm), it is bonded between two dielectric layers with gum.Its working frequency range is 860Mhz-900Mhz, in the case where working frequency is 912Mhz
It is optimal, reading distance 7.14m.
Embodiment 2
The present embodiment 2 is using the Monza R6 chip of Impinj company, and aluminium is as antenna conductor.Change antenna structure
In parameter, as shown in table 2.
2 antenna stack design parameter (mm) of table
Other steps are in the same manner as in Example 1.Obtained coating performance is close to embodiment 1.
Claims (10)
1. a kind of flexibility UHF RFID anti-metal tag, which is characterized in that including the label protective layer being from top to bottom successively bonded
(2), label chip (1), antenna stack (3), substrate layer (4) are constituted；The substrate layer includes first layer dielectric layer (41) and second
Layer dielectric layer (42), first layer dielectric layer are U-shaped structure open at one end and are bonded with the antenna stack (3), second layer medium
Layer (42) is located at first layer dielectric layer and bends in U-shaped space, and the label chip (1) and the antenna stack (3) are by falling to encapsulate
Technique is fixed.
2. a kind of flexibility UHF RFID anti-metal tag according to claim 1, which is characterized in that the first layer medium
Layer (41) is thin polymer film, and the material of the thin polymer film includes polyimides or polyethylene terephthalate, institute
Stating second layer dielectric layer (42) is foam medium layer, and the first layer dielectric layer (41) and the second layer dielectric layer (42) utilize
Gum bonding, further includes protective layer, and the protective layer wraps up the label chip (1), and the protective layer is coated in the antenna
On layer (3), the material of the protective layer is ink.
3. a kind of flexibility UHF RFID anti-metal tag according to claim 1 or 2, which is characterized in that the first layer
Dielectric layer with a thickness of 50-125um, length 112.6-113.25mm, width 20-21mm；The thickness of the second layer dielectric layer
Spend 0.5-1mm, length 56mm, width 20-21mm.
4. a kind of flexibility UHF RFID anti-metal tag according to claim 1, which is characterized in that the antenna stack (3)
It is machined on first layer dielectric layer (41), antenna stack (3) includes the radiating element and metal base plate being sequentially etched out from left to right
Two funtion parts, centre are connected with connecting line, and the radiating element of the antenna stack (3) is by primary radiation piece and electric small ring structures structure
At；Electric small ring structures are embedded into primary radiation piece, and the two is connected by non-centrosymmetrical connecting line, and asymmetric connection line distinguishes position
In electric small ring structures bottom edge and the right, line width and the small loop wire of electricity are wide consistent；U-type groove is opened to increase day in primary radiation on piece simultaneously
The flow path length on line surface.
5. a kind of flexibility UHF RFID anti-metal tag according to claim 4, which is characterized in that the antenna stack (3)
Radiating element length be 56mm, width 20-21mm, the electric small ring structures length of the antenna stack (3) is 16-16.5mm,
Width is 8-8.5mm.
6. a kind of flexibility UHF RFID anti-metal tag according to claim 5, which is characterized in that the antenna stack (3)
Connecting line positioned at the right can be moved to left in the ratio of electric small ring structures width edge length, and moving distance accounts for the ratio of width edge length
Example range is 0-0.5.
7. a kind of flexibility UHF RFID anti-metal tag according to claim 4, which is characterized in that the gold of the antenna stack
Belong to bottom plate function part and separated sinuous slot, to increase label gain, the sinuous slot part of the metal base plate of the antenna stack, width
Direction short side is 12-12.5mm, long side 15.6-16.1mm；Length direction is 11.275-11.5mm.
8. a kind of flexibility UHF REID anti-metal tag according to claim 1, which is characterized in that the antenna stack (3)
Material with metal base plate layer is copper or aluminium, and the antenna is compounded in the first layer dielectric layer (41) using etching technics
On, the antenna stack with a thickness of 10-16um.
9. a kind of flexibility UHF REID anti-metal tag according to claim 1, described it is characterized in that, flexible UHF
RFID anti-metal tag is Nian Jie using adhesive sticker with metal component.
10. a kind of design and verification method of flexibility UHF RFID anti-metal tag, comprising:
S1, optimize the material for determining the flexibility UHF RFID anti-metal tag and most using electromagnetic simulation software HFSS or CST
Excellent parameter, and make the flexibility UHF RFID anti-metal tag；
S2, Tagformance reader is connect with the flexibility UHF RFID anti-metal tag and acquires the flexibility UHF
The performance parameter of RFID anti-metal tag, until the flexibility UHF RFID anti-metal tag obtains optimal reading distance and reads
Information.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811449715.XA CN109713427B (en) | 2018-11-29 | 2018-11-29 | Ultra-thin flexible UHF RFID anti-metal label antenna |
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|---|---|---|---|
| CN201811449715.XA CN109713427B (en) | 2018-11-29 | 2018-11-29 | Ultra-thin flexible UHF RFID anti-metal label antenna |
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| CN109713427A true CN109713427A (en) | 2019-05-03 |
| CN109713427B CN109713427B (en) | 2021-01-29 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110443339A (en) * | 2019-07-11 | 2019-11-12 | 永道射频技术股份有限公司 | A kind of antifalsification label applied to bottled machine oil |
| CN111882019A (en) * | 2020-07-25 | 2020-11-03 | 北京国金源富科技有限公司 | Electronic tag suitable for inside cable |
| CN112216969A (en) * | 2020-09-22 | 2021-01-12 | 天津大学 | Compact UHF RFID folding anti-metal tag antenna |
| CN113314829A (en) * | 2021-06-18 | 2021-08-27 | 合肥工业大学 | Radio frequency identification ultrahigh frequency band tag antenna applied to metal environment |
| CN111799554B (en) * | 2020-07-08 | 2021-12-31 | 中国人民解放军陆军装甲兵学院 | Flexible anti-metal RFID (radio frequency identification) tag antenna and impedance analysis method |
| EP4254264A2 (en) | 2022-04-01 | 2023-10-04 | Feedpool Technology Co., Ltd. | Isolation film, method of manufacturing isolation film, and uhf rfid tag using isolation film |
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| CN113314829A (en) * | 2021-06-18 | 2021-08-27 | 合肥工业大学 | Radio frequency identification ultrahigh frequency band tag antenna applied to metal environment |
| EP4254264A2 (en) | 2022-04-01 | 2023-10-04 | Feedpool Technology Co., Ltd. | Isolation film, method of manufacturing isolation film, and uhf rfid tag using isolation film |
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| CN109713427B (en) | 2021-01-29 |
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