CN102930326B - Anti-metal RFID tag and the radio-frequency recognition system including the label - Google Patents
Anti-metal RFID tag and the radio-frequency recognition system including the label Download PDFInfo
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- CN102930326B CN102930326B CN201110230841.8A CN201110230841A CN102930326B CN 102930326 B CN102930326 B CN 102930326B CN 201110230841 A CN201110230841 A CN 201110230841A CN 102930326 B CN102930326 B CN 102930326B
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Abstract
The present invention provides a kind of anti-metal radio frequency identification (RFID) label and the radio-frequency recognition system including the label, belongs to technical field of RFID.The label antenna of the RFID tag include two on block main radiator substantially symmetrical about its central axis, the first feeder line between described two main radiators its be plugged in inductance bar on first feeder line, the paster of ground connection, the second feeder line for connecting each main radiator and the paster；Wherein, first feeding line portion with each main radiator slot-coupled, the main radiator is used to realize that the label antenna is matched with the label chip capacitive, and first feeder line and inductance bar are provided commonly for realizing that the label antenna is matched with label chip perception.The RIFD labels have that anti-metal characteristic is good, cost is low, and thickness is small and the characteristics of small volume.
Description
Technical field
The invention belongs to radio frequency identification (Radio Frequency Identification, RFID) technical field, it is related to
A kind of anti-metal RFID tag and the RFID system including the RFID tag.
Background technology
RFID technique has been widely used in every field extensively, for example, sale of goods, transport, production, useless
The fields such as property management reason, postal tracking, aviation luggage management, vehicle toll management, traditional paper tape bar code is because of its storage capacity
It is small, the shortcomings of can not rewrite, in identification field, it is slowly substituted by RFID system.
RFID system normally include multiple RFID tags, at least one communicate with the RFID tag with antenna
RFID reader and the computing device for controlling the RFID reader.Normally, RFID tag by RFID label antenna and
Label chip is constituted；RFID reader includes：For by energy or information provide to RFID tag transmitter and for from
RFID tag identity and other information；The information that computing device processing is obtained by RFID reader.RFID reader
Transmitter via antenna export RF (Radio Frequency, radio frequency) signal, so as to produce electromagnetic field, the electromagnetic field causes
Label returns to the RF signals for carrying information.
In an rfid tag, the radio wave signal produced by electromagnetic field is to be sent to label via its RFID label antenna
Chip, also, the current signal of label chip is to be sent to by RFID label antenna in space.But, ordinary RFID tag
When attaching on the product applied to metal surface (such as car plate), due to reflex of the metal surface to incident electromagnetic wave,
Stronger opposite direction electromagnetic wave will be had thus produced also through electronic tag, between metal and RFID tag and closely couple effect
Should so that the parameter such as input impedance, directional diagram, gain, bandwidth of RFID antenna all changes, and then have a strong impact on RFID readings
Device is taken to the reading distance of RFID tag, or even can not read and cause antenna failure.
Therefore, to avoid application of the above phenomenon limit RFI D labels under metal environment, mainly pass through in the prior art
Following several ways improve reading situation of the RFID tag under metal environment.
The first is, by adjusting distance between the antenna in RFID tag and metal surface.When antenna and metal surface
The distance between be adjusted to 0.25 λ0When (operation wavelength in vacuum), back wave and work electromagnetism that metal surface is caused
Ripple is by in-phase stacking, and the performance of antenna will be maintained or even improve.But this method inevitably makes the thickness of RFID tag
Degree and volume are greatly increased.
Second is that high-k material is filled between metal surface and the antenna of RFID tag.The high dielectric is normal
Number material may be used as the substrate or matrix of RFID tag, so as to shorten the electromagnetic wave ripple between metal surface and antenna
It is long, and make back wave become to contribute to the electromagnetic wave of antenna normal work.For example, Application No. PCT/JP2007/001287
The RFID tag of EGB (Electromagnetic Band-Gap, electro-magnetic bandgap) structure, this EGB structures are proposed in the world
It is relative complex in structure, it is difficult to fabricate.And this mode depends on high-k material, inevitably brings
The problem of high cost.
Absorbing material is set in an rfid tag to absorb the settling mode of back wave in addition, also also having, for example, IFA
(Inverted F Antenna, reverse F antennas).But, absorbing material absorbs the part electricity for also absorbing RFID reader transmitting
Magnetic wave, causes energy to be easily dissipated in absorbing material, not by RFID tag (particularly passive tag types) well
Utilize.Also, the problem of setting of absorbing material also inevitably brings high cost.
In view of this, it is necessary to propose a kind of new anti-metal RFID tag.
The content of the invention
An object of the present invention is, realizes the anti-metal characteristic of RFID tag.
A further object of the present invention is, reduces the cost of anti-metal RFID tag.
To realize object above or other purposes, the present invention provides following technical scheme.
It is an aspect of this invention to provide that provide a kind of RFID tag, including matrix and it is arranged on described matrix
Label antenna and label chip, the label antenna include：
Two block main radiators, it is on substantially symmetrical about its central axis；
The first feeder line between described two main radiators, first feeding line portion with each main radiator gap
Coupling；
Inductance bar, it is plugged on first feeder line；
Paster, it is used to be grounded；
Second feeder line, it is used to connect each main radiator and the paster；
Wherein, the main radiator is used to realize that the label antenna is matched with the label chip capacitive；Described first
Feeder line and inductance bar are provided commonly for realizing that the label antenna is matched with label chip perception.
One embodiment of the RFID tag provided according to the present invention, wherein, the distributing point of the label antenna is located at first
Interface between feeder line and paster, the label chip is placed in the distributing point.
The another embodiment of the RFID tag provided according to the present invention, wherein, in the range of 0.2mm to 13mm operationally
Gap spacing between first feeder line and the radiant body is set, to realize label antenna and label chip perception
Match somebody with somebody.And/or the width of first feeder line is operationally set in the range of 0.2mm to 13mm, to realize label antenna
Matched with label chip perception.And/or operationally set and stitched with each main radiator in the range of 5mm to 60mm
The length range of first feeder line of the part of gap coupling, to realize that label antenna is matched with label chip perception.
In the RFID tag embodiment of the foregoing description, it is preferable that the U-shaped that first feeder line is made up of three sections of feeder lines
Operationally set in the range of feeder line, each comfortable 0.2mm to 13mm of width of every section of feeder line.
In the RFID tag embodiment of the foregoing description, alternatively, the main radiator can be rectangular block shape, trapezoidal
Square block or square dice shape.
The another embodiment of the RFID tag provided according to the present invention, wherein, at 50 square millimeters to 1200 square millimeters
In the range of the area of each main radiator is operationally set, to realize that this realizes that the label antenna holds with the label chip
Property matching.
In the RFID tag embodiment of the foregoing description, alternatively, described and each main radiator slot-coupled part
First feeder line abreast sets relative to the main radiator or obliquely set.
In the RFID tag embodiment of the foregoing description, it is preferable that first feeder line is U-shaped feeder line, the U-shaped feeder line
Opening is towards the paster, and inductance bar is plugged on first feeder line so that the inductance bar is partly by first feeder line
Surround.
The a further embodiment of the RFID tag provided according to the present invention, wherein, in the range of 3mm to 100mm operationally
The length of the inductance bar of the part surrounded by first feeder line is set, to realize label antenna and label chip perception
Match somebody with somebody.
In the RFID tag embodiment of the foregoing description, it is preferable that the inductance bar is basic relative to the main radiator
It is arranged in parallel.
In the RFID tag embodiment of the foregoing description, it is preferable that the inductance bar is located on the central shaft.
In the RFID tag embodiment of the foregoing description, it is preferable that second feeder line is straight feeder line.
In the RFID tag embodiment of the foregoing description, it is preferable that the arrangement paster, the second feeder line and main radiator with
Form the planar tags antenna for being essentially "convex" shaped.
In the RFID tag embodiment of the foregoing description, it is preferable that the thickness range of described matrix is 1mm to 60mm.
In the RFID tag embodiment of the foregoing description, it is preferable that described matrix is made up of foamed material.
According to another aspect of the present invention there is provided a kind of radio-frequency recognition system, it include it is multiple as described above and it is any
A kind of RFID tag.
The solution have the advantages that, the agile kernel model for the shape that the RFID tag passes through label antenna, so that its
Adjustable setting property is strong, it is easy to the impedance matching between label antenna and label chip is realized under metal environment, therefore, anti-gold
Belong to characteristic good.Also, independent of the thickness and/or material of the matrix of RFID tag, cost is low, thickness is small and small volume.
Brief description of the drawings
From described further below with reference to accompanying drawing, it will make above and other objects of the present invention and advantage more complete
It is clear, wherein, same or analogous key element, which is adopted, to be indicated by the same numeral.
Fig. 1 is the structural representation of the RFID tag provided according to first embodiment of the invention.
Fig. 2 is the structural representation of the RFID tag provided according to second embodiment of the invention.
Fig. 3 is the structural representation of the RFID tag provided according to third embodiment of the invention.
Fig. 4 is the structural representation of the RFID tag provided according to fourth embodiment of the invention.
Fig. 5 is the structural representation of the RFID tag provided according to fifth embodiment of the invention.
Embodiment
What is be described below is some in multiple possible embodiments of the invention, it is desirable to provide to the basic of the present invention
Solution, it is no intended to confirm the crucial or conclusive key element of the present invention or limit scope of the claimed.It is readily appreciated that, according to this
The technical scheme of invention, in the case where not changing the connotation of the present invention, those of ordinary skill in the art can be proposed can be mutual
The other implementations replaced.Therefore, detailed description below and accompanying drawing are only the examples to technical scheme
Property explanation, and the whole or be considered as being not to be construed as the present invention is defined or limited to technical solution of the present invention.
Fig. 1 show the structural representation of the RFID tag provided according to first embodiment of the invention.In this embodiment,
Label 10 includes matrix 1000, label chip 900 and the RFID label antenna formed by metal.RFID label antenna can lead to
Cross the method composition such as printing, etching and be formed on matrix 1000 (shape as shown in FIG.), so as to form flat plane antenna；Label
Chip 900 is placed at the distributing point 160 of RFID label antenna.
Structure first to the planar tags antenna of RFID tag shown in Fig. 1 is described in detail.
As shown in figure 1, label antenna includes two block main radiators 110, two main radiators 110 are on wherein one
Bar central shaft 190 is symmetrical.The shape of main radiator 110 can be rectangle, trapezoidal or square etc., but its concrete shape is not
Limited by the embodiment of the present invention.By the way that main radiator is set into bulk, its effective radiating area is larger, can effectively improve mark
Sign the entire gain and RCS (Radar Cross-Section, RCS) value of antenna.
Spacing range between two main radiators 110 can be 5mm to 100mm, in it of two main radiators 110
Between, U-shaped feeder line 120 and long and narrow inductance bar 130 can be set.Two sections of horizontal component feeder lines of U-shaped feeder line 120 respectively with each master
Gap is formed between radiant body, so that its horizontal component operationally realizes slot-coupled with main radiator, that is, primary radiation
Body 110 can realize aperture-coupled by the horizontal segment part of U-shaped feeder line.Distributing point 160 is arranged on U-shaped feeder line 120
One end and paster 140 between interface, in another embodiment, distributing point 160 can also be arranged on U-shaped feeder line 120
Interface between one end of upper level-end part and paster 140.Long and narrow inductance bar 130 is vertically plugged in U-shaped feeder line 120
Vertical section part, when long and narrow inductance bar 130 is plugged in U-shaped feeder line 120, can make the institute of part insertion U-shaped feeder line 120 therein
In the region of encirclement, part (the L portions in such as figure that the insertion portion namely U-shaped feeder line 120 of long and narrow inductance bar 130 is surrounded
Shown in point).
Preferably, set in an essentially parallel manner between the horizontal segment part of U-shaped feeder line and each main radiator 110；Certainly, exist
In other embodiments, can also obliquely it be set with smaller angle between the horizontal segment part of U-shaped feeder line and each main radiator 110
Put.Long and narrow inductance bar 130 is preferably disposed on central shaft 190.
It should be noted that above-mentioned " horizontal component " and " vertical component " are the RFID relative to the embodiment illustrated in fig. 1
The placement orientation of label is come what is defined, and they are relative concept.When being changed in the placement orientation of RFID tag, its
Relative change therewith.
Continue as shown in figure 1, label antenna also includes paster 140 and connection paster 140 and the straight feeder line of main radiator
150.In this embodiment, the region between two main radiators 110 of alignment substantially of paster 140 is set, two straight 150 points of feeder lines
The upper edge and lower edge of paster 140 are not arranged at.Therefore, paster 140, two straight feeder lines 150 and two bases of main radiator 110
One "convex" shaped shape of local arrangement form；Paster 140 is referred to as " convex paster " (its relative to two main spokes herein
Beam evagination is set).So, be conducive to saving the area of label antenna.
In actual applications, the impedance of label chip 900 can be expressed as (A '+B ' j) ohm, wherein, " A ' " represents resistance
Anti- real part, " B ' " represents the imaginary part of impedance；The label antenna impedance of RFID tag can be expressed as (A+Bj) ohm, wherein,
" A " represents the real part of impedance, and " B " represents the imaginary part of impedance.In the present invention, the real part size of the impedance of label antenna can lead to
Overregulate and set the area of main radiator 110 to adjust, the imaginary part size of the impedance of label antenna can set mark by adjusting
Sign the U-shaped feeder line 120 of antenna, the feature size of long and narrow inductance bar 130 to adjust, for example, the water of regulation U-shaped feeder line 120
Gap spacing between flat section part and main radiator 110, and/or the horizontal segment part of regulation U-shaped feeder line 120 length, and/
Or the size of insertion portion (namely L) of the long and narrow inductance bar 130 of regulation etc..
To realize that RFID label antenna is transmitted with label chip ceiling capacity, it is necessary to realize the conjugation of the two impedance as far as possible
Match somebody with somebody, namely (A '+B ' j)=(A+Bj).Therefore, it is necessary to make to realize capacitive between the RFID label antenna and the label chip 900
Matching, namely the real part of both impedances are of substantially equal (A '=A)；It is necessary that realizing the RFID label antenna and the label core
Perception matching between piece 900, namely the real part of both impedances are of substantially equal (B '=B).In the invention, set by adjusting
The area of main radiator 110 realizes that the basic capacitive between RFID label antenna and the label chip 900 matches (namely A ' bases
This is equal to A), for example, in 50mm2To 1200mm2In the range of regulation set main radiator 110 area (be such as set to
600mm2) realize；By adjusting U-shaped feeder line 120, the shape facility size of long and narrow inductance bar 130 realize RFID tag day
Basic perception between line and the label chip 900 matches (namely B ' is substantially equal to B), for example, by 0.2mm to 13mm models
The gap spacing (being such as set to 10mm) between interior regulation setting U-shaped feeder line 120 and each radiant body 110 is enclosed, or is passed through
Regulation sets the width (being such as set to 6mm or 8mm) of U-shaped feeder line 120 in the range of 0.2mm to 13mm, or by 5mm
Regulation sets the length range (being such as set to 20mm or 40mm) of the horizontal segment part of U-shaped feeder line in the range of to 60mm, or
Pass through the length in the long and narrow inductance bar (i.e. L portion) for the part that regulation setting is surrounded by U-shaped feeder line in the range of 3mm to 100mm
Spend (being such as set to 50mm or 80mm), also or by more than four kinds of modes any combination come realize jointly label antenna with
Basic perception matching between the label chip 900.Therefore, when the RFID tag is applied to metal environment, RFID tag day
The design flexibility of line is greatly increased, as environmental change can be with adjusted design RFID label antenna, it is easy to make label antenna with
Environmental change and realize impedance matching, eliminate influence of the metallic reflection to RFID tag.
It should be noted that when regulation sets the width of U-shaped feeder line 120 in the range of 0.2mm to 13mm, constituting U-shaped
Width between 3 end feeder lines of feeder line can be with unequal, i.e. 3 end feeder lines can distinguish each its width of self-regulation, so that favorably
In the logical resistance degree of adjustment electric current, realize trickle impedance regulation.
Further, in the case of strong by the tag antenna design flexibility of the present invention, the anti-metal of RFID tag 10
Characteristic is not rely on matrix 1000, for example, matrix 1000 no longer needs to select high-k material, matrix 1000
Thickness is also without being set to 0.25 λ0, therefore, the cost of RFID tag 10 can be substantially reduced, and thickness can also be reduced.
In the embodiment, matrix 1000 can be with alternative costs are relatively high but radioresistance characteristic is good FR4 (epoxy glass fabric), polyethylene
(polyethene) or the material such as polyester (polyester), can also alternative costs the material such as foam.RFID label antenna 10
Integral thickness can also be arranged in the range of 1mm to 60mm (such as 5mm), therefore, while anti-metal, thickness is relatively
It is small.
Setting is changed by the shape to the label antenna in embodiment illustrated in fig. 1, following examples can be obtained
RFID tag.
Fig. 2 show the structural representation of the RFID tag provided according to second embodiment of the invention.As shown in Fig. 2
RFID tag 20 similarly includes matrix 1000, label chip 900 and the label antenna being placed on the matrix, label chip
900 are placed at the distributing point 260 of label antenna.Label antenna includes two on the symmetrically arranged main radiator of central shaft 290
210th, the feeder line 220 and long and narrow inductance bar 230 in region, the paster 240 of ground connection are placed between two main radiators 210 and is used for
Connect paster 240 and the straight feeder line 250 of main radiator 210.Compared to the label antenna of embodiment illustrated in fig. 1, its difference includes U
Shape difference, the shape difference of paster 140 and 240 between type feeder line 120 and feeder line 220.Main radiator 210 similarly with feedback
Realize slot-coupled in the horizontal segment part of line 220.
Fig. 3 show the structural representation of the RFID tag provided according to third embodiment of the invention.As shown in figure 3,
RFID tag 30 similarly includes matrix 1000, label chip 900 and the label antenna being placed on the matrix, label chip
900 are placed at the distributing point 360 of label antenna.Label antenna includes two on the symmetrically arranged main radiator of central shaft 390
310th, the U-shaped feeder line 320 and inductance bar 330 in region, the paster 340 of ground connection are placed between two main radiators 310 and is used for
Connect paster 340 and the straight feeder line 350 of main radiator 310.Compared to the label antenna of embodiment illustrated in fig. 1, its difference includes U
Shape difference, the shape difference of paster 140 and 340 between type feeder line 120 and U-shaped feeder line 320, and inductance bar 330 is in U-shaped
Vertical section part is provided with the region that feeder line 320 is surrounded, so as to further increase the regulation of the imaginary impedance of label antenna
Flexibility ratio.Main radiator 310 similarly realizes slot-coupled with the horizontal segment part of U-shaped feeder line 320.
Fig. 4 show the structural representation of the RFID tag provided according to fourth embodiment of the invention.As shown in figure 4,
RFID tag 40 similarly includes matrix 1000, label chip 900 and the label antenna being placed on the matrix, label chip
900 are placed at the distributing point 460 of label antenna.Label antenna includes two on the symmetrically arranged main radiator of central shaft 490
410th, the feeder line 420 and long and narrow inductance bar 430 in region, the paster 440 of ground connection are placed between two main radiators 410 and is used for
Connect paster 440 and the straight feeder line 450 of main radiator 410.Compared to the label antenna of embodiment illustrated in fig. 1, its difference includes U
Shape difference, the shape difference of paster 140 and 440 between type feeder line 120 and feeder line 420, wherein feeder line 420 can bend folding
Set to adjust the length of feeder line 420 and main radiator slot-coupled part foldedly.
Fig. 5 show the structural representation of the RFID tag provided according to fifth embodiment of the invention.As shown in figure 5,
RFID tag 50 similarly includes matrix 1000, label chip 900 and the label antenna being placed on the matrix, label chip
900 are placed at the distributing point 560 of label antenna.Label antenna includes two on the symmetrically arranged main radiator of central shaft 590
510th, the feeder line 520 and long and narrow inductance bar 530 in region, the paster 540 of ground connection are placed between two main radiators 510 and is used for
Connect paster 540 and the straight feeder line 550 of main radiator 510.Compared to the label antenna of embodiment illustrated in fig. 1, its difference includes U
Shape difference, the shape difference of paster 140 and 540 between type feeder line 120 and feeder line 520, with primary radiation wherein in feeder line 52
Boxed area is set in the line segment of the slot-coupled part of body 510, the boxed area can for local directed complete set electric current logical resistance, adjust
Feeder line and main radiator slot-coupled degree are saved, the fine adjustments of impedance are realized.
Same section of the figure 2 above into the RFID tag of embodiment illustrated in fig. 5 with the RFID tag of embodiment illustrated in fig. 1
Setting and operation principle no longer describe one by one, similarly, Fig. 2 to the RFID tag of Fig. 5 embodiments can apply to becket
In, anti-metal characteristic is good.
Present invention simultaneously provides RFID system, it include described in multiple above example RFID tag (10,20,
30th, 40 or 50), the RFID system also includes RFID reader with antenna and based on controlling the RFID reader
Calculate device.RFID reader and computing device are the part that those skilled in the art are fully able to realize, are no longer retouched one by one herein
State.
Example above primarily illustrates the RFID tag and its RFID system of the present invention.Although only to some of present invention
Embodiment be described, but those of ordinary skill in the art are it is to be appreciated that the present invention can be without departing from its spirit
With implementing in scope in many other forms.Therefore, the example shown is considered as schematical rather than limit with embodiment
Property processed, in the case where not departing from the spirit and scope of the present invention as defined in appended claims, the present invention may be contained
Lid various modification and replacement.
Claims (14)
1. a kind of RFID tag, including matrix and the label antenna and label chip that are arranged on described matrix,
Characterized in that, the label antenna includes：
Two block main radiators, it is on substantially symmetrical about its central axis；
The first feeder line between described two main radiators, first feeding line portion with each main radiator gap coupling
Close；
Inductance bar, it is plugged on first feeder line；
Paster, it is used to be grounded；
Second feeder line, it is used to connect each main radiator and the paster；
Wherein, the main radiator is used to realize that the label antenna is matched with the label chip capacitive；First feeder line
It is provided commonly for realizing that the label antenna is matched with label chip perception with inductance bar；
Wherein, first feeder line is U-shaped feeder line, and the opening of the U-shaped feeder line is towards the paster, and inductance article is plugged in described the
So that the inductance bar is partly surrounded by first feeder line on one feeder line；Arrange the paster, the second feeder line and primary radiation
Body is to be formed as the planar tags antenna of "convex" shaped.
2. RFID tag as claimed in claim 1, it is characterised in that the distributing point of the label antenna is located at the first feedback
Interface between line and paster, the label chip is placed in the distributing point.
3. RFID tag as claimed in claim 1, it is characterised in that operationally set in the range of 0.2mm to 13mm
The gap spacing between first feeder line and the radiant body is put, to realize label antenna and label chip perception
Match somebody with somebody.
4. the RFID tag as described in claim 1 or 3, it is characterised in that in the range of 0.2mm to 13mm operationally
The width of first feeder line is set, to realize that label antenna is matched with label chip perception.
5. RFID tag as claimed in claim 4, it is characterised in that the U-shaped feeder line is three sections of feeder line compositions, every section
Operationally set in the range of each comfortable 0.2mm to 13mm of width of feeder line.
6. the RFID tag as described in claim 1 or 3, it is characterised in that operationally set in the range of 5mm to 60mm
The length range with the first feeder line of the part of each main radiator slot-coupled is put, to realize label antenna and the label core
Piece perception matching.
7. RFID tag as claimed in claim 1, it is characterised in that the main radiator is rectangular block shape, trapezoidal
Square block or square dice shape.
8. the RFID tag as described in claim 1 or 7, it is characterised in that at 50 square millimeters to 1200 square millimeters
In the range of the area of each main radiator is operationally set, to realize that this realizes that the label antenna holds with the label chip
Property matching.
9. RFID tag as claimed in claim 1, it is characterised in that described and each main radiator slot-coupled part
The first feeder line abreast set or obliquely set relative to the main radiator.
10. RFID tag as claimed in claim 1, it is characterised in that operationally set in the range of 3mm to 100mm
The length of the inductance bar of the part surrounded by first feeder line is put, to realize label antenna and label chip perception
Match somebody with somebody.
11. RFID tag as claimed in claim 1, it is characterised in that the inductance bar is relative to the main radiator
It is arranged in parallel.
12. the RFID tag as described in claim 1 or 11, it is characterised in that the inductance bar is located at the central shaft
On.
13. RFID tag as claimed in claim 1, it is characterised in that the thickness range of described matrix be 1mm extremely
60mm。
14. a kind of radio-frequency recognition system, it is characterised in that know including multiple radio frequencies as any one of claim 1-13
Distinguishing label.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110230841.8A CN102930326B (en) | 2011-08-12 | 2011-08-12 | Anti-metal RFID tag and the radio-frequency recognition system including the label |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110230841.8A CN102930326B (en) | 2011-08-12 | 2011-08-12 | Anti-metal RFID tag and the radio-frequency recognition system including the label |
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| Publication Number | Publication Date |
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| CN102930326A CN102930326A (en) | 2013-02-13 |
| CN102930326B true CN102930326B (en) | 2017-10-10 |
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| CN110866581A (en) * | 2018-08-28 | 2020-03-06 | 江苏省质量和标准化研究院 | Anti-metal antenna radio frequency identification tag and radio frequency identification system comprising same |
| CN112216969B (en) * | 2020-09-22 | 2021-12-03 | 天津大学 | Compact UHF RFID folding anti-metal tag antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101308951A (en) * | 2008-07-01 | 2008-11-19 | 华南理工大学 | Wide-band electronic label antenna under multi-application environment |
| CN101667678A (en) * | 2009-10-12 | 2010-03-10 | 嘉兴佳利电子有限公司 | Radio frequency identification antenna |
| CN202257645U (en) * | 2011-08-12 | 2012-05-30 | 扬州稻源微电子有限公司 | Metal-resistant RFID (radio frequency identification) tag and RFID system comprising tag |
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2011
- 2011-08-12 CN CN201110230841.8A patent/CN102930326B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101308951A (en) * | 2008-07-01 | 2008-11-19 | 华南理工大学 | Wide-band electronic label antenna under multi-application environment |
| CN101667678A (en) * | 2009-10-12 | 2010-03-10 | 嘉兴佳利电子有限公司 | Radio frequency identification antenna |
| CN202257645U (en) * | 2011-08-12 | 2012-05-30 | 扬州稻源微电子有限公司 | Metal-resistant RFID (radio frequency identification) tag and RFID system comprising tag |
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| CN102930326A (en) | 2013-02-13 |
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