CN103530680B - A kind of double-frequency radio-frequency identification tag and include the radio-frequency recognition system of this label - Google Patents
A kind of double-frequency radio-frequency identification tag and include the radio-frequency recognition system of this label Download PDFInfo
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- CN103530680B CN103530680B CN201310422644.5A CN201310422644A CN103530680B CN 103530680 B CN103530680 B CN 103530680B CN 201310422644 A CN201310422644 A CN 201310422644A CN 103530680 B CN103530680 B CN 103530680B
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Abstract
The invention discloses a kind of double-frequency radio-frequency identification tag and include the radio-frequency recognition system of this label.The present invention includes that matrix, label antenna and label chip, label antenna and label chip are arranged on matrix；Described label antenna is provided with a centrage, and includes HF coil antenna and UHF antenna, and UHF antenna is symmetrical arranged about centerline axis；Described label chip includes HF label chip and UHF label chip, and HF label chip and UHF label chip are arranged on distributing point；HF coil antenna includes that metal antenna coil, antenna are passed a bridge；UHF antenna includes main radiator, microstrip feed line；Being passed a bridge by antenna and be connected with distributing point in the inner of metal antenna coil, outer end is directly connected with distributing point；The two ends of microstrip feed line are connected with main radiator.The present invention passes through integrated UHF label antenna and HF label antenna, reduces the cost that UHF and HF label is applied simultaneously, improves application efficiency.
Description
Technical field
The invention belongs to RF identification (Radio Frequency Identification, RFID) skill
Art field, relates to a kind of double frequency (including HF and uhf band) RFID tag and includes this mark
The radio-frequency recognition system signed.
Background technology
RF identification (Radio Frequency Identification, RFID) technology is by extensively
General be widely used in every field, such as, sale of goods, transport, produce, waste management,
The fields such as postal tracking, aviation luggage management, vehicle toll management, traditional strip of paper shape code is because of it
The shortcomings such as storage capacity is little, can not rewrite, in the field of identification, it is the most slowly replaced by rfid system
Generation.
Rfid system normally includes multiple RFID label tag, at least one communicates with this RFID label tag
There is the RFID reader of antenna and for controlling the calculating device of this RFID reader.Generally
Ground, RFID label tag is made up of RFID label antenna and label chip；RFID reader includes: be used for
Energy or information are provided the transmitter of RFID label tag and be used for from RFID tag identity and
Other information；Calculate device and process the information obtained by RFID reader.Sending out of RFID reader
Device is sent to export RF(Radio Frequency, radio frequency via antenna) signal, thus produce electromagnetic field,
This electromagnetic field makes RFID label tag return the RF signal of information of carrying.
In an rfid tag, radio wave signal produced by electromagnetic field is via its RFID label tag sky
Line is sent to label chip, and, the current signal of label chip is by RFID label antenna transmission
In space.RFID label tag is mainly divided into 4 frequency bands by frequency range, its divide and performance, should
With as shown in table 1 below:
The performance of table 1 different frequency range rfid system
At present, each band RFID label overwhelming majority is one-segment application, low frequency, high frequency, super
High frequency, microwave RFID label tag each incompatible.In actual applications, a kind of one label of frequency range.HF
Label uses near field coil coupling technique due to it, it is provided that higher level of security and bigger information are deposited
Storage space；And UHF label has more preferable reading/writing distance and speed.Need same in some application scenario
Time use HF and UHF label, simultaneously use two independent HF and UHF labels, not only formality is numerous
Trivial, and cost is the highest.If able to HF and UHF is combined, it is integrated into inside a label
Go, application cost can be substantially reduced, improve efficiency.
HF label uses magnetic field coupling and rfid interrogator carries out information exchange, antenna substrate and surface
Metal is less on its impact；And UHF uses the form of electromagnetic transmission and rfid interrogator to carry out information
Exchange, antenna substrate and surface metal have a strong impact on gain and the level of impedance match of UHF antenna, enter
And affect reading/writing distance and the performance of UHF label.Therefore, if HF antenna and UHF antenna collection
Becoming on same matrix, HF antenna can produce great electromagnetic coupled to UHF antenna, and both are not easy to
Integrated.
In view of this, it is necessary to propose a kind of Novel double-frequency section (HF and UHF) RFID label tag.
Summary of the invention
Present invention aims to the deficiencies in the prior art, it is provided that a kind of double frequency (includes HF and UHF
Frequency range) RFID tag and include the radio-frequency recognition system of this label.
The present invention provides the solution technical scheme that its technical problem is used as follows:
A kind of double-frequency radio-frequency identification tag, including matrix, label antenna and label chip, label antenna
It is arranged on matrix with label chip；Described label antenna is provided with a centrage, and includes HF line
Circle antenna and UHF antenna, UHF antenna is symmetrical arranged about centerline axis；Described label chip includes
HF label chip and UHF label chip, and HF label chip and UHF label chip be arranged at feed
On point；
HF coil antenna includes that metal antenna coil, antenna are passed a bridge；UHF antenna include main radiator,
Microstrip feed line；Being passed a bridge by antenna and be connected with distributing point in the inner of metal antenna coil, outer end is direct
It is connected with distributing point；Main radiator and microstrip feed line the most into strips, the two ends of microstrip feed line and main spoke
Beam is connected；Main radiator is symmetrical about centrage with the attachment structure of microstrip feed line, and distributing point sets
Put in main radiator or microstrip feed line, and coaxial with centrage.
Described main radiator and microstrip feed line are vertical bar shape or curved crease line shape.
Described HF coil antenna and UHF antenna share same antenna matrix, and the thickness range of matrix
For 0.01mm～60mm.
The width of described HF coil antenna is 0.2mm～2.5mm, every turn coil in HF coil antenna
Between distance in the range of 0.2mm～2mm；The length of the outer coil of HF coil antenna at 30mm～
In the range of 80mm, width is in the range of 15mm～50mm.
Described UHF antenna is arranged on the outside of HF coil antenna, and the main radiator in UHF antenna is curved
Bent U-shaped, U-shaped opening is towards the metal antenna coil in HF coil antenna；Described UHF antenna
In the width of main radiator in the range of 0.2mm～15mm, length is in the range of 10mm～100mm；
Distance between main radiator and HF coil antenna is in the range of 0.5mm～20mm.
In described UHF antenna, the width of microstrip feed line is in the range of 0.2mm～13mm, and length exists
In the range of 0.5mm～15mm；Distance between microstrip feed line and distributing point is in 0.5mm～15mm scope
In；The angle of microstrip feed line bending is in the range of 0～90.
The described flexible folding of microstrip feed line 21 repeatedly, with vertical bar and U-shaped be optimal.Described master
The flexible folding of radiant body repeatedly, with U-shaped be optimal.
A kind of radio-frequency recognition system, including one or more double-frequency radio-frequency identification tags.
Beneficial effects of the present invention is as follows:
The present invention passes through integrated UHF label antenna and HF label antenna so that it is can be applicable to uhf band
With HF frequency range, reduce the cost that UHF and HF label is applied simultaneously, improve application efficiency.Should simultaneously
RFID label antenna structure is compact to design, area is little, by the agile kernel model of the shape of label antenna,
Make its scalable setting property strong, applied range.
Accompanying drawing explanation
Fig. 1 is the structural representation of the RFID label tag provided according to first embodiment of the invention.
Fig. 2 is the structural representation of the RFID label tag provided according to second embodiment of the invention.
Fig. 3 is the structural representation of the RFID label tag provided according to third embodiment of the invention.
Fig. 4 is the structural representation of the RFID label tag provided according to fourth embodiment of the invention.
In figure, label 30, matrix 20, microstrip feed line 21, main radiator 22, label chip 23,
Distributing point 24, antenna gap bridge 25, metal antenna coil 26, centrage 27.
Detailed description of the invention
Be described below is that the multiple of the present invention may some in embodiments, it is desirable to provide to the present invention's
Basic understanding, it is no intended to confirm the crucial of the present invention or conclusive key element or limit claimed model
Enclose.Easy to understand, according to technical scheme, under the connotation not changing the present invention, this
The those skilled in the art in field can propose other implementations that can mutually replace.Therefore, in detail below
Embodiment and accompanying drawing are only the exemplary illustrations to technical scheme, and are not to be construed as this
Invention whole or be considered as technical solution of the present invention is defined or limited.
Embodiment 1
The structural representation of the RFID label tag provided according to first embodiment of the invention is provided.
In this embodiment, label 30 includes matrix 20, label chip 23 and the RFID formed by metal
Label antenna (such as black part sub-pattern in figure).RFID label antenna is by method structures such as printing, etchings
Figure is formed at (shape as shown in FIG.) on matrix 20, thus forms flat plane antenna；Label chip
23 are arranged at the distributing point 24 of RFID label antenna.
RFID label antenna has centrage 28, and UHF antenna is symmetrical about centrage 28.For
Realize more clearly describing, as shown in Figure 1, the direction at centrage 28 place be defined as y direction,
The direction being perpendicular to centrage 28 is defined as x direction.
First the structure of the RFID label antenna shown in Fig. 1 is described in detail.
As it is shown in figure 1, label antenna is provided with a centrage 27, including HF coil antenna and UHF
Antenna, UHF antenna is symmetrical about centerline axis；Label chip 23 includes HF label chip and UHF
Label chip, and HF label chip and UHF label chip be arranged on distributing point 24.HF coil
Antenna includes metal antenna coil 26, antenna gap bridge 25；UHF antenna includes main radiator 22, micro-strip
Feeder line 21.The inner of metal antenna coil 26 is connected with distributing point 24, outward by antenna gap bridge 25
End is directly connected with distributing point 24.The two ends of microstrip feed line 21 are connected with main radiator 22；Main
Radiant body 22 is symmetrical about centrage 27 with the attachment structure of microstrip feed line 21, and distributing point 24 is arranged
On microstrip feed line 21 and coaxial with centrage 27.Main radiator 22 all becomes with microstrip feed line 21
Strip, can with folded bent, but its concrete shape is not limited by the embodiment of the present invention.
Main radiator 22 is linked with label chip by microstrip feed line 21, the width of strip main radiator 22
Degree is arranged in the range of 0.2mm to 15mm.
Between main radiator 22 and label chip 23, it is provided with microstrip feed line 21, microstrip feed line 21
Symmetrical about centrage 28, the width of microstrip feed line is arranged in the range of 0.2mm to 13mm, to adjust
The impedance of whole UHF antenna, it is achieved with UHF label chip conjugate impedance match.
In example 2 (as shown in Figure 2), microstrip feed line 21 is bent into U-shaped rear and main spoke for twice
Beam connects, and in this embodiment, main radiator 22 is near HF coil antenna, and microstrip feed line 21
Away from HF coil antenna.
In embodiment 3 (as shown in Figure 3), microstrip feed line 21 is vertical bar shape, direct and primary radiation
Body connects.
Continuing as it is shown in figure 1, HF coil antenna is positioned at the inner side that UHF surrounds, this HF coil antenna leads to
Cross antenna gap bridge 25 to be connected with the label chip at distributing point 24.
In HF coil antenna, the width of metal antenna coil 26 can set in the range of 0.2mm to 2.5mm
Putting, the number of turns can be arranged between 4～15, and convenient and HF label chip realizes resonance.
As it is shown in figure 1, UHF antenna is arranged on the side of HF coil antenna shorter edge, and form encirclement
Shape, and HF label chip and UHF label chip are placed at same distributing point 24.
In embodiment 4 (as shown in Figure 4), UHF antenna is arranged on the side of HF coil antenna longer sides,
And form encirclement shape, and HF label chip and UHF label chip are placed at same distributing point 24.
In actual applications, label chip 23 includes HF label chip and UHF label chip.UHF
The impedance of label chip can be expressed as (A '+B ' j) ohm, wherein, " A ' " represent impedance
Real part, " B ' " represents the imaginary part of impedance；The label antenna impedance of RFID label tag can be expressed as (A+Bj)
Ohm, wherein, " A " represents the real part of impedance, and " B " represents the imaginary part of impedance.
Transmit with UHF label chip ceiling capacity for realizing UHF label antenna, it is necessary to realize two as far as possible
The conjugate impedance match of person's impedance, namely (A '+B ' j)=(A+Bj).Therefore, it is necessary to make to realize this RFID
Between label antenna with this label chip, capacitive is mated, namely the real part of both impedances is of substantially equal
(A '=A)；It is necessary that realize this RFID label antenna and this chip 11 UHF label chip it
Between perception coupling, namely the imaginary part of both impedances substantially opposite (B '=-B)；At A '=A, B '=-B
Time, i.e. achieve impedance matching.
The capacitance of the loading of HF label chip is expressed as C farad；The inductance value of HF coil antenna represents
Prosperous for L.For realizing HF labeling task in F=13.56MHz, it is necessary to make below equation set up: Wherein, π is pi.
In the present invention, the impedance magnitude of UHF antenna by regulation arrange main radiator 22 length and/
Or width and/or shape, microstrip feed line 22 length and/or width, main radiator 22 and HF coil sky
The distance area of line and/or shape regulate.
In the present invention, HF coil antenna and the resonant frequency of HF label chip are by adjusting coil 26
Width and length, every turn coil between distance complete.
In this embodiment, the length of main radiator 22 is set by regulation and realizes RFID UHF days
Impedance between line with UHF label chip is mated substantially, such as, adjusts in the range of 10mm to 100mm
Joint arranges main radiator 22 and realizes, also further for example, regulate in the range of 0.2mm to 15mm and arrange
The width of main radiator 22 realizes basic capacitive coupling；By regulating the shape facility chi of feeder line 21
Basic perception between the very little RFID of realization UHF label antenna and this UHF label chip mate (namely
B ' is substantially equal to-B), such as, feeder line 21 is set by regulation in the range of 0.2mm to 13mm
Length (is such as set to 10mm), thus arranges the spacing between main radiator 22 and distributing point, or
Person arranges the distance of main radiator 22 and HF aerial coil by regulation in the range of 0.5mm to 20mm
(being such as set to 6mm or 8mm), also or by the combination in any of above several ways comes the most in fact
Existing basic perception between label antenna with this label chip 30 is mated.
In this embodiment, by the length of regulation aerial coil or/and width realizes HF coil sky
Line and HF label chip resonance at 13.56MHz, such as, set in the range of 0.2mm to 2.5mm
The width putting described HF aerial coil 26 realizes；Also further for example, arrange in the range of 0.2mm to 2mm
Distance between often enclosing in described HF aerial coil 26 realizes；By regulating the circle of HF aerial coil
Number realizes HF antenna with HF label chip resonance at 13.56MHz, such as, encloses (example 4 to 15
As being set to 10 circles) realize.
It should be noted that when regulation arranges the length of main radiator 22 and microstrip feed line 21, main
The number of times of radiant body 22 and microstrip feed line 21 bending can be arranged respectively between 0 to 5；Micro-strip is presented
The angle of line bending can be 0 (such as shown in Fig. 3) to 90 (such as shown in Fig. 1, Fig. 2).
Further, in the case of strong by the tag antenna design motility of the present invention, RFID label tag
Two-band characteristic be not rely on matrix 20, such as, matrix 20 is no longer necessary to select RF4 material material
Material, the thickness of matrix 20 is also without being set to 0.25 λ0, therefore, the cost of RFID label tag 10 can
To be substantially reduced, thickness can also reduce.In this embodiment, matrix 20 can be relative with alternative costs
The FR4(epoxy glass fabric that high but radioprotective characteristic is good), polyethylene (polyethene) or polyester
(polyester) material such as, it is also possible to the materials such as the foam that alternative costs are low.RFID label antenna
In the range of integral thickness can also be arranged on 0.01mm to 60mm (such as 0.8mm).
By the shape of the label antenna in embodiment illustrated in fig. 1 being changed setting, can obtain
The RFID label tag of following example.
Embodiment 2
Fig. 2 show the structural representation of the RFID label tag provided according to second embodiment of the invention.As
Shown in Fig. 2, RFID label tag 30 similarly includes matrix 20, label chip 23 and is formed by metal
RFID label antenna (such as black part sub-pattern in figure).Label antenna is provided with a centrage 27, bag
Including HF coil antenna and UHF antenna, UHF antenna is symmetrical about centerline axis；Label chip 23 includes
HF label chip and UHF label chip, and HF label chip and UHF label chip be arranged at feed
On point 24.HF coil antenna includes metal antenna coil 26, antenna gap bridge 25；UHF antenna includes
Main radiator 22, microstrip feed line 21.The inner of metal antenna coil 26 is by antenna gap bridge 25 and feedback
Electricity point 24 is connected, and outer end is directly connected with distributing point 24.The two ends of microstrip feed line 21 and main spoke
Beam 22 is connected；Main radiator 22 and the attachment structure of microstrip feed line 21 are right about centrage 27
Claiming, distributing point 24 is arranged in main radiator 22, and coaxial with centrage 27.Microstrip feed line 21
Away from HF coil antenna, and main radiator 22 is near HF coil antenna, and forms semi-surrounding structure.
Compared to the label antenna of embodiment illustrated in fig. 11, its difference essentially consists in the difference of microstrip feed line,
Main radiator is overall near HF coil antenna.
Embodiment 3
Fig. 3 show the structural representation of the RFID label tag provided according to third embodiment of the invention.As
Shown in Fig. 3, RFID label tag 30 similarly includes matrix 20, label chip 23 and is formed by metal
RFID label antenna (such as black part sub-pattern in figure).Label antenna is provided with a centrage 27, bag
Including HF coil antenna and UHF antenna, UHF antenna is symmetrical about centerline axis；Label chip 23 includes
HF label chip and UHF label chip, and HF label chip and UHF label chip be arranged at feed
On point 24.HF coil antenna includes metal antenna coil 26, antenna gap bridge 25；UHF antenna includes
Main radiator 22, microstrip feed line 21.The inner of metal antenna coil 26 is by antenna gap bridge 25 and feedback
Electricity point 24 is connected, and outer end is directly connected with distributing point 24.The two ends of microstrip feed line 21 and main spoke
Beam 22 is connected；Main radiator 22 and the attachment structure of microstrip feed line 21 are right about centrage 27
Claiming, distributing point 24 is arranged on microstrip feed line 21, and coaxial with centrage 27.Microstrip feed line 21
Near HF coil antenna, and main radiator 22 is away from HF coil antenna, and forms semi-surrounding structure.
Compared to the label antenna of embodiment illustrated in fig. 1, its difference mainly includes the shape of microstrip feed line 21
Shape difference, microstrip feed line 21 is vertical bar shape and is directly connected with main radiator.
Embodiment 4
Fig. 4 show the structural representation of the RFID label tag provided according to fourth embodiment of the invention.As
Shown in Fig. 4, RFID label tag 30 similarly includes matrix 20, label chip 23 and is formed by metal
RFID label antenna (such as black part sub-pattern in figure).Label antenna is provided with a centrage 27, bag
Including HF coil antenna and UHF antenna, UHF antenna is symmetrical about centerline axis；Label chip 23 includes
HF label chip and UHF label chip, and HF label chip and UHF label chip be arranged at feed
On point 24.HF coil antenna includes metal antenna coil 26, antenna gap bridge 25；UHF antenna includes
Main radiator 22, microstrip feed line 21.The inner of metal antenna coil 26 is by antenna gap bridge 25 and feedback
Electricity point 24 is connected, and outer end is directly connected with distributing point 24.The two ends of microstrip feed line 21 and main spoke
Beam 22 is connected；Main radiator 22 and the attachment structure of microstrip feed line 21 are right about centrage 27
Claiming, distributing point 24 is arranged on microstrip feed line 21, and coaxial with centrage 27.Microstrip feed line 21
Near HF coil antenna, and main radiator 22 is away from HF coil antenna, and forms semi-surrounding structure.
Compared to the label antenna of embodiment illustrated in fig. 11, its difference essentially consists in UHF antenna and is positioned at HF line
The longer side of circle antenna.
Figure 2 above is to RFID with embodiment illustrated in fig. 1 in the RFID label tag of embodiment illustrated in fig. 4
Setting and the operation principle of the same section of label describe the most one by one, and similarly, Fig. 2 to Fig. 4 is real
The RFID label tag executing example can be applied to uhf band and HF frequency range.
Present invention simultaneously provides rfid system, it includes the RFID described in multiple above example
Label (30), this rfid system also includes the RFID reader with antenna and for controlling this
The calculating device of RFID reader.RFID reader and calculating device are that those skilled in the art are entirely capable of
Enough parts realized, describe the most one by one at this.
Example above primarily illustrates RFID label tag and the rfid system thereof of the present invention.Although only to it
In some embodiments of the present invention be described, but those of ordinary skill in the art it is to be appreciated that
The present invention can be implementing with other forms many with in scope without departing from its spirit.Therefore, institute's exhibition
The example shown and embodiment are considered illustrative and not restrictive, without departing from the most appended each power
In the case of profit requires defined spirit and scope of the present invention, the present invention may contain various amendments
With replacement.
Claims (2)
1. a double-frequency radio-frequency identification tag, including matrix, label antenna and label chip, label sky
Line and label chip are arranged on matrix；It is characterized in that: described label antenna is provided with a center
Line, and include HF coil antenna and UHF antenna, UHF antenna is symmetrical arranged about centerline axis；Institute
The label chip stated includes HF label chip and UHF label chip, and HF label chip and UHF mark
Sign chip to be arranged on distributing point；
HF coil antenna includes that metal antenna coil, antenna are passed a bridge；UHF antenna include main radiator,
Microstrip feed line；Being passed a bridge by antenna and be connected with distributing point in the inner of metal antenna coil, outer end is direct
It is connected with distributing point；Main radiator and microstrip feed line the most into strips, the two ends of microstrip feed line and main spoke
Beam is connected；Main radiator is symmetrical about centrage with the attachment structure of microstrip feed line, and distributing point sets
Put in main radiator or microstrip feed line, and coaxial with centrage；Described main radiator and micro-strip feedback
Line is vertical bar shape or curved crease line shape；Described HF coil antenna and UHF antenna share same antenna base
Body, and the thickness range of matrix is 0.01mm～60mm；The width of described HF coil antenna is
In 0.2mm～2.5mm, HF coil antenna, the distance between every turn coil is in the range of 0.2mm～2mm；
The length of the outer coil of HF coil antenna is in the range of 30mm～80mm, and width is at 15mm～50mm
In the range of；Described UHF antenna is arranged on the outside of HF coil antenna, the primary radiation in UHF antenna
Body bending is U-shaped, and U-shaped opening is towards the metal antenna coil in HF coil antenna；Described UHF
The width of the main radiator in antenna is in the range of 0.2mm～15mm, and length is at 10mm～100mm model
In enclosing；Distance between main radiator and HF coil antenna is in the range of 0.5mm～20mm；Described
In UHF antenna, the width of microstrip feed line is in the range of 0.2mm～13mm, and length is at 0.5mm～15mm
In the range of；Distance between microstrip feed line and distributing point is in the range of 0.5mm～15mm；Microstrip feed line
The angle of bending is in the range of 0～90.
The radio-frequency recognition system that a kind of double-frequency radio-frequency identification tag the most according to claim 1 is constituted,
It is characterized in that including one or more double-frequency radio-frequency identification tag as claimed in claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310422644.5A CN103530680B (en) | 2013-09-16 | 2013-09-16 | A kind of double-frequency radio-frequency identification tag and include the radio-frequency recognition system of this label |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310422644.5A CN103530680B (en) | 2013-09-16 | 2013-09-16 | A kind of double-frequency radio-frequency identification tag and include the radio-frequency recognition system of this label |
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| Publication Number | Publication Date |
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| CN103530680A CN103530680A (en) | 2014-01-22 |
| CN103530680B true CN103530680B (en) | 2016-08-17 |
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| CN201310422644.5A Expired - Fee Related CN103530680B (en) | 2013-09-16 | 2013-09-16 | A kind of double-frequency radio-frequency identification tag and include the radio-frequency recognition system of this label |
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Families Citing this family (12)
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| US9582750B2 (en) * | 2014-12-22 | 2017-02-28 | Avery Dennison Retail Information Services, Llc | RFID devices with multi-frequency antennae |
| CN104834956B (en) * | 2015-04-30 | 2017-12-08 | 东莞电子科技大学电子信息工程研究院 | A kind of hyperfrequency and high-frequency radio frequency identification label and its method for transmitting signals |
| EP3338220B1 (en) * | 2015-08-17 | 2021-01-06 | SMARTRAC TECHNOLOGY GmbH | Transponder apparatus |
| CN105373826B (en) * | 2015-11-19 | 2019-02-19 | 上海仪电智能电子有限公司 | A kind of double frequency intelligent label |
| CN105470627A (en) * | 2015-11-19 | 2016-04-06 | 上海仪电智能电子有限公司 | Double-frequency intelligent label antenna |
| CN105512718B (en) * | 2016-01-08 | 2018-09-07 | 上海海鼎无线射频***有限公司 | A kind of double frequency RFID tag |
| JP6987867B2 (en) * | 2016-12-29 | 2022-01-05 | エイヴェリー デニソン リテール インフォメーション サービシズ リミテッド ライアビリティ カンパニー | Dual function strap for resonant elements and ultra high frequency antennas |
| CN107679612A (en) * | 2017-10-18 | 2018-02-09 | 江苏联恒物宇科技有限公司 | A kind of tamper double frequency RFID label tag and preparation method thereof |
| CN107819207B (en) * | 2017-12-04 | 2024-05-28 | 成都思悟革科技有限公司 | Short-distance radiator |
| CN108448227A (en) * | 2018-03-28 | 2018-08-24 | 武汉纺织大学 | A kind of reader antenna suitable for intensive counter |
| CN111860738A (en) * | 2020-07-17 | 2020-10-30 | 昆山华冠商标印刷有限公司 | Wireless radio frequency identification device |
| CN112909538A (en) * | 2021-01-13 | 2021-06-04 | 宁波大学 | High-frequency RFID reader-writer antenna |
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| CN101789543A (en) * | 2010-03-19 | 2010-07-28 | 上海集成电路研发中心有限公司 | Multi-system and multi-band frequency RFID (Radio Frequency Identification) antenna |
| CN102254213A (en) * | 2011-07-14 | 2011-11-23 | 上海复旦天臣新技术有限公司 | Double-frequency radio-frequency identification tag |
| CN203465749U (en) * | 2013-09-16 | 2014-03-05 | 杭州电子科技大学 | Dual-frequency radio frequency identification tag and radio frequency identification system comprising the same |
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| Publication number | Publication date |
|---|---|
| CN103530680A (en) | 2014-01-22 |
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