CN206115466U - No chip RFID label of ultra wide band pole change - Google Patents
No chip RFID label of ultra wide band pole change Download PDFInfo
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- CN206115466U CN206115466U CN201620876195.0U CN201620876195U CN206115466U CN 206115466 U CN206115466 U CN 206115466U CN 201620876195 U CN201620876195 U CN 201620876195U CN 206115466 U CN206115466 U CN 206115466U
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- metal
- metal ring
- ring
- standard
- rfid label
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Abstract
The utility model discloses a no chip RFID label of ultra wide band pole change, including label paster unit, metal ground board and medium base plate, label paster unit is located the upper surface of medium base plate, the metal ground board is located the lower surface of medium base plate, label paster unit comprises with at least one central circular metal paster at least one metal ring group, the circular metal paster in center is located the metal ring inter block, coincides with the centre of a circle of metal ring group in its centre of a circle, and metal ring group comprises a m metal ring, and a m metal ring distributes for nested, M less than or equal to 3, every metal ring realizes two brachyplast festivals of the equal loading of inner ring of a bit encoding figure place, every metal ring, the utility model has the advantages of with low costs, interference killing feature is strong, easily detect in actual environment and have great coding capacity with comparing with the kind label.
Description
Technical field
This utility model is related to chipless RFID field, and in particular to a kind of ultra broadband polarization chipless RFID label.
Background technology
RF identification (RFID) by microwave signal identification specific objective and reads and writes related data as a kind of, and need not
The wireless recognition technique of machinery or optical contact is set up between identifying system and specific objective, range of application is increasingly extensive.
General radio-frequency recognition system is made up of the part such as reader, application system and label, and wherein label plays key player：
As Internet of Things is in the extensive application of the industries such as traffic, logistics, industry and retailing, the article number for adhering to RFID tag is needed
Amount steeply rises, and one of following development trend of RFID tag is for replacing bar code, because relative to existing bar
For shape code technology, RFID tag has the advantages such as big data capacity, accessible reading and batch detection, can be better achieved
The automatization of stock is tracked.With the large-scale application of billions of RFID tags, the portion of whole RFID system
Administration's expense is by depending on the cost of RFID tag.And it is traditional have chip tag due in structure comprising integrated circuit and encoding and decoding
Chip causes manufacturing cost higher, it is impossible to meet the requirement of large-scale mass production and application.Chipless RFID label is due to system
Make low cost, be adapted to the reasons such as batch production, it has also become the current focus of research, mainly have at present midsequent, time domain coding type,
The type such as electromagnetism back scattering type and near field print wire ring type.Synthetic operation distance, data capacity, size and work frequency
The factors such as section consider, are the main Types of current application using the back scattering type chipless RFID label of Frequency Domain Coding.
Except with addition to higher code capacity, label must also possess in actual environment can be by for chipless RFID label
Read and the simple characteristic of collimation technique.At present chipless RFID system, process is surveyed in two steps in label, the first step (calibration
Detection) background environment first to existing without label carries out detection and obtains data S1, and second step is right under identical background environment
Label carries out detection and obtains data S2, and data S2-S1 that removing background environment affects are final valid data.Wherein data S1
The impact of object accompanying by label is included, if therefore adhering to material, size etc. of object and changing and need to recalibrate.And have
The label of " polarization " technology (depolarizing technique), need not include the thing accompanying by label during calibration detection
Body, obviates because the object of label attachment has the trouble that very big uncertainty brings, and so just can greatly simplify calibration
Technology.And dual-mode antenna is mutually orthogonal at reader end, the isolation of dual-mode antenna is improve.
Utility model content
In order to overcome the shortcoming of prior art presence with a kind of not enough, ultra broadband polarization chipless of this utility model offer
RFID tag.
This utility model is adopted the following technical scheme that：
A kind of ultra broadband polarization chipless RFID label, including label chip unit, metal floor and medium substrate, institute
Upper surface of the label chip unit positioned at the medium substrate is stated, the metal floor is located at the lower surface of medium substrate, described
Label chip unit is made up of at least one round metal ring group and at least one central circular metal patch, the central circular gold
Category paster is located in round metal ring group, and its center of circle overlaps with the center of circle of round metal ring group, and round metal ring group is by m metal ring structure
Into m metal ring is nested distribution, and the m is less than or equal to 3, and each metal ring realizes a coding digit, each metal
The internal ring of annulus loads two brachyplast sections；
It is referred to as standard nested groups as m=3, the round metal ring group of standard nested groups is made up of three metal rings, outermost
The metal ring of layer is standard ring, and intermetallic metal annulus and inner layer metal annulus passing ratio zoom factor reduce and obtain.
The internal diameter of the standard ring is 5.5mm, and external diameter is 6mm.
Described two brachyplast sections are mutually orthogonal, are directed to the center of circle.
The scaling coefficient is 0.78, by the ring contraction 0.78 times of generation intermetallic metal annulus of standard, by the contracting of standard ring
Little is 0.78 × 0.78 times of generation inner layer metal annulus.
The length and width of two brachyplasts section of the internal ring loading of standard ring is 0.5mm, intermetallic metal annulus and inner layer metal
Proportionally zoom factor diminution is obtained two brachyplasts section of the internal ring loading of annulus.
Standard nested groups realize coding 111, and increasing round metal ring group increases coding digit, and the round metal ring group of increase is logical
Cross proportionally zoom factor and zoom in or out standard nested groups and obtain.
The medium substrate is monolayer.
The beneficial effects of the utility model：
What this utility model provided a kind of employing polarization-agile technology works in the low cost that UWB frequency ranges can be used for commodity code
Chipless RFID label.Apart from label dead ahead, the line polarization wave of a vertical direction is launched as request signal to label,
Resonance can be produced using different size of metal ring in different Frequency points to be encoded, i.e., the resonance crest of specific frequency is compiled
Code is " 1 ", and resonance crest is encoded to " 0 " when disappearing.
By in metal ring load in brachyplast section realize polarization-agile technology, if there is the line pole of a vertical direction
Change ripple and incide the label surface, can be realized by RCS (RCS) component in detection level direction specific
Coding, can so simplify the calibration process in actually detected, and increased transmitting and reception antenna in reader one end
Isolation.
Three different size of annulus are constituted into a nested groups by being nested with technology, this mode can improve medium
The space surface utilization rate of substrate, while can also improve the code capacity density of label.
Description of the drawings
Fig. 1 is that the work system comprising a kind of ultra broadband polarization chipless RFID label is tied in this utility model embodiment
Composition；
Fig. 2 (a) is a kind of top view of ultra broadband polarization chipless RFID label of this utility model；
Fig. 2 (b) is that a kind of standard nested groups structure side of ultra broadband polarization chipless RFID label of this utility model is regarded
Figure；
Fig. 2 (c) is that a kind of ultra broadband polarization chipless RFID label of this utility model realizes that the structure that 9-bit is encoded is bowed
View；
Fig. 3 (a) is a kind of Parameter Map of the standard nested groups of ultra broadband polarization chipless RFID label of this utility model；
Fig. 3 (b) is the parameter schematic diagram of Fig. 2 (c)；
Fig. 4 (a) is that a kind of standard nested groups of ultra broadband polarization chipless RFID label of this utility model realize 3-bit
The RCS figures of coding " 111 "；
Fig. 4 (b) is that a kind of ultra broadband polarization chipless RFID label of this utility model realizes that 9-bit is encoded
The RCS figures of " 111111111 "；
Specific embodiment
With reference to embodiment and accompanying drawing, this utility model is described in further detail, but reality of the present utility model
Apply mode not limited to this.
Embodiment
As shown in figure 1, a kind of work system of ultra broadband polarization chipless RFID label, by reader, transmitting antenna
TX, reception antenna RX and label are constituted, and transmitting antenna TX launches vertically polarized wave as request signal, and this signal is through label
The horizontal component of back reflection can be obtained by reception antenna RX, some the specific frequencies of the RCS of the horizontal component for receiving in frequency domain
Obvious resonance crest is shown as, the coding of certain digit is thus capable of achieving.
As shown in Fig. 2 (a) and Fig. 2 (b), a kind of ultra broadband polarization chipless RFID label works in UWB frequency ranges, bag
Label chip unit 2, metal floor 7 and single-layer medium substrate 1 are included, the label chip unit 2 is located at the single-layer medium base
The upper surface of plate 1, the metal floor 7 is located at the lower surface of single-layer medium substrate 1.
Label chip unit is made up of at least one round metal ring group and at least one central circular metal patch, round metal
Ring group and central circular metal patch are one-to-one relationships, the center of circle and the round metal ring group of the central circular metal patch
The center of circle overlaps, and each round metal ring group is made up of m metal ring, and each metal ring realizes a coding digit, m metal
Annulus is nested distribution, and the m is less than or equal to 3, and the internal ring of each metal ring loads two brachyplast sections.
As m=3, i.e., one group by three metal rings when be referred to as standard nested groups, outermost metal ring is standard
Ring, intermetallic metal annulus and inner layer metal annulus passing ratio zoom factor are zoomed in or out and obtained, and realize coding 111.
Two brachyplasts section that intermetallic metal annulus and inner layer metal annulus are loaded is also that passing ratio zoom factor amplifies
Or the brachyplast section of diminution outermost metal annulus is obtained.
This utility model can select to increase according to actual needs by a metal ring or two metal rings or three
The round metal ring group that metal ring is constituted, every group of metal ring all corresponds central circular metal patch.
It using the resonance point position of resonance crest and the size of ring is one-to-one closing that this utility model realizes that coding is
System, i.e. the bigger resonance point in ring footpath is lower, otherwise the less resonance point in ring footpath is higher, and will encode frequency range control by control ring footpath size
System is within UWB frequency ranges (3.1-10.6GHz).The frequency for having resonance crest is encoded to " 1 ", to realize that it is right that coding " 0 " is removed
The annulus answered and other annulus keep constant.
Label chip unit described in the present embodiment 2 is pasted by three concentric metal ring 2A-2C and central circular metal
Piece 6 is constituted, and a metal ring represents a coding, three concentric metal ring nesting distributions, and outer layer metal annulus 2A is
Standard ring, be embedded in outer layer metal annulus centre and inner layer metal annulus by standard ring passing ratio zoom factor SF amplify or
Reduce and generate, in the present embodiment, outer layer metal annulus is standard ring, and scaling coefficient SF is 0.78, intermetallic metal annulus 2B
By standard it is ring contraction 0.78 times generation intermetallic metal annulus, by standard it is ring contraction be 0.78 × 0.78 times generation inner layer metal annulus
2C, the center of circle of the central circular metal patch 6 overlaps with the center of circle of three metal rings, for improving the intensity of echo-signal
And accuracy.
The internal diameter r1 of the standard ring is 5.5mm, and external diameter R1 is 6mm.
The internal ring of the three-layer metal annulus loads two brachyplast sections, and described two brachyplast sections are mutually orthogonal, point to circle
The heart, the length and width of two brachyplasts section of outer layer metal annulus are 0.5mm.The metal ring of loading brachyplast section can realize polarization
Function, i.e. vertically polarized wave are beaten on the interior metal ring to loading brachyplast section, can be examined in the horizontal component in echo
Measure specific frequency and obvious resonance crest occur.
If three above-mentioned metal rings and central circular metal patch constitute a standard nested groups, tri-bit encoding is represented
Digit, to increase coding digit, that is, increases the number of nested groups, and these nested groups can be by standard nested groups by suitable contracting
Put proportionality coefficient SF and zoom in or out generation.Label as shown in Fig. 2 (c) realizes 9-bit codings, and wherein T1 is that standard is nested
Standard nested groups T1 are implemented scale smaller or are amplified to generate two other nested groups T2 and T3 by group.
In the present embodiment, the medium substrate adopts high frequency sheet material Rogers 4003, and its relative dielectric constant is 3.55,
Electrical loss angle tangent value is 0.0027.The size of medium substrate is directly proportional with the coding digit that label is realized, thickness H is
0.8mm.As shown in Fig. 3 (a), the square medium substrate length at the standard nested groups place of 3-bit codings：L=14mm；As schemed
Shown in 3 (b), the medium substrate length of the label employing of 9-bit codings：W1=46mm, width：W2=16mm, between nested groups
Spacing distance：G=3mm.
As shown in Fig. 3 (a), the present embodiment Plays nested groups design parameter from outside to inside is as follows：
Outermost metal annulus is the outer radius of standard ring：R1=6mm, inside radius：R1=5.5mm, loads brachyplast section
Length：D1=0.5mm, the loading brachyplast of outer layer metal annulus saves the width of 3V, 3H：D1=0.5mm；
Metallic intermediate layer annulus：Outer radius：R2=0.78 × R1mm, inside radius：R2=0.78 × r1mm, loads brachyplast
Length d2=0.78 of section × d1mm, the loading brachyplast of intermetallic metal annulus saves the width of 4V, 4H：D2=0.78 × d1mm；
Inner layer metal annulus：Outer radius：R3=0.78 × 0.78 × R1mm, inside radius：R3=0.78 × 0.78 × r1mm,
Length d3=0.78 × 0.78 × the d1mm of loaded brachyplast section, the loading brachyplast of inner layer metal annulus saves the width of 5V, 5H：d3
=0.78 × 0.78 × d1mm.
Positioned at the radius of central circular metal patch：R=2mm.
Standard nested groups shown in Fig. 2 (a) are capable of achieving 3-bit codings, its RCS analogous diagram according to common Frequency Domain Coding
As shown in Fig. 4 (a), solid line is cross polarization part, and dotted line is coplanar polarized portions, and the RCS spectrograms of cross polarization can be real
Polarization chipless RFID system shown in existing Fig. 1, i.e. bold portion can be used to carry out Frequency Domain Coding；Wherein three resonance waves
Metal ring in peak and Fig. 2 (a) is corresponded, and the coding of " 0 " can be realized by removing a certain annulus.And the frequency that works
Section is UWB frequency ranges (3.1GHz-10.6GHz).
As shown in Fig. 2 (c), can be by carrying out continuation to standard nested groups T1 to increase code capacity：Standard is nested
Group T1 reduces certain proportion and forms nested groups T2, standard nested groups T1 is amplified into certain proportion and forms nested groups T3.So formed
Label according to common Frequency Domain Coding be capable of achieving 9-bit coding, its such as Fig. 4 (b) institute of RCS analogous diagrams in UWB frequency ranges
Show, the annulus one-to-one corresponding of all resonance peaks mark and in Fig. 2 (c), again may be by removing a certain annulus and realize one
The coding of " 0 ".
The label has low cost, strong antijamming capability, be easy in actual environment detection and with same kind label
Comparing has the advantages that larger code capacity.
Above-described embodiment is this utility model preferably embodiment, but embodiment of the present utility model is not by described
The restriction of embodiment, it is other it is any without departing from the change made under spirit of the present utility model and principle, modify, replace
Generation, combination, simplification, should be equivalent substitute mode, be included within protection domain of the present utility model.
Claims (7)
1. a kind of ultra broadband polarization chipless RFID label, it is characterised in that including label chip unit, metal floor and Jie
Matter substrate, the label chip unit is located at the upper surface of the medium substrate, and the metal floor is located under medium substrate
Surface, the label chip unit is made up of at least one round metal ring group and at least one central circular metal patch, described
Central circular metal patch is located in round metal ring group, and its center of circle overlaps with the center of circle of round metal ring group, and round metal ring group is by m
Metal ring is constituted, and m metal ring is nested distribution, and the m is less than or equal to 3, and each metal ring realizes a bits of coded
Number, the internal ring of each metal ring loads two brachyplast sections；
It is referred to as standard nested groups as m=3, the round metal ring group of standard nested groups is made up of three metal rings, outermost
Metal ring is standard ring, and intermetallic metal annulus and inner layer metal annulus passing ratio zoom factor reduce and obtain.
2. a kind of ultra broadband polarization chipless RFID label according to claim 1, it is characterised in that the standard ring
Internal diameter be 5.5mm, external diameter is 6mm.
3. a kind of ultra broadband polarization chipless RFID label according to claim 1, it is characterised in that described two short
Minor matters are mutually orthogonal, are directed to the center of circle.
4. a kind of ultra broadband polarization chipless RFID label according to claim 1, it is characterised in that the ratio contracting
Coefficient is put for 0.78, by the ring contraction 0.78 times of generation intermetallic metal annulus of standard, by standard it is ring contraction be 0.78 × 0.78 times of life
Into inner layer metal annulus.
5. a kind of ultra broadband polarization chipless RFID label according to claim 2, it is characterised in that standard ring it is interior
The length and width of two brachyplasts section of ring loading are the two of the internal ring loading of 0.5mm, intermetallic metal annulus and inner layer metal annulus
Proportionally zoom factor diminution is obtained individual brachyplast section.
6. a kind of ultra broadband polarization chipless RFID label according to claim 1, it is characterised in that standard nested groups
Coding 111 is realized, increasing round metal ring group increases coding digit, and the round metal ring group of increase is that proportionally zoom factor amplifies
Or diminution standard nested groups are obtained.
7. a kind of ultra broadband polarization chipless RFID label according to claim 1, it is characterised in that the medium base
Plate is monolayer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620876195.0U CN206115466U (en) | 2016-08-12 | 2016-08-12 | No chip RFID label of ultra wide band pole change |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620876195.0U CN206115466U (en) | 2016-08-12 | 2016-08-12 | No chip RFID label of ultra wide band pole change |
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| Publication Number | Publication Date |
|---|---|
| CN206115466U true CN206115466U (en) | 2017-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620876195.0U Expired - Fee Related CN206115466U (en) | 2016-08-12 | 2016-08-12 | No chip RFID label of ultra wide band pole change |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106295765A (en) * | 2016-08-12 | 2017-01-04 | 华南理工大学 | A kind of ultra broadband polarization chipless RFID label |
| CN112186333A (en) * | 2020-09-29 | 2021-01-05 | 华南理工大学 | Base station antenna, radiation unit and radiation arm |
| JP2023507670A (en) * | 2020-09-04 | 2023-02-24 | 浙江大学 | Concave groove type ultra-wide band depolarization chipless RFID tag |
-
2016
- 2016-08-12 CN CN201620876195.0U patent/CN206115466U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106295765A (en) * | 2016-08-12 | 2017-01-04 | 华南理工大学 | A kind of ultra broadband polarization chipless RFID label |
| CN106295765B (en) * | 2016-08-12 | 2023-08-22 | 华南理工大学 | Ultra-wideband polarization-variable chipless RFID tag |
| JP2023507670A (en) * | 2020-09-04 | 2023-02-24 | 浙江大学 | Concave groove type ultra-wide band depolarization chipless RFID tag |
| JP7253297B2 (en) | 2020-09-04 | 2023-04-06 | 浙江大学 | Concave groove type ultra-wide band depolarization chipless RFID tag |
| US11822993B2 (en) | 2020-09-04 | 2023-11-21 | Zhejiang University | Slot-type ultra-wideband depolarized chipless RFID tag |
| CN112186333A (en) * | 2020-09-29 | 2021-01-05 | 华南理工大学 | Base station antenna, radiation unit and radiation arm |
| CN112186333B (en) * | 2020-09-29 | 2021-06-25 | 华南理工大学 | Base station antenna, radiation unit and radiation arm |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |