CN108539375A - A kind of fabric base super high frequency radio frequency identification antenna and manufacturing method - Google Patents
A kind of fabric base super high frequency radio frequency identification antenna and manufacturing method Download PDFInfo
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- CN108539375A CN108539375A CN201810292441.1A CN201810292441A CN108539375A CN 108539375 A CN108539375 A CN 108539375A CN 201810292441 A CN201810292441 A CN 201810292441A CN 108539375 A CN108539375 A CN 108539375A
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- China
- Prior art keywords
- antenna
- dipole antenna
- step structure
- super high
- high frequency
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
- H01Q1/2225—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
- H01Q9/20—Two collinear substantially straight active elements; Substantially straight single active elements
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- Details Of Aerials (AREA)
Abstract
The present invention relates to a kind of fabric base super high frequency radio frequencies to identify antenna, enhance region including inductive coupling, first dipole antenna and the second dipole antenna, the left side that first dipole antenna enhances region with inductive coupling is connected, the right side that second dipole antenna enhances region with inductive coupling is connected, inductive coupling enhancing region includes the first coupling part and the second coupling part, one end of first coupling part is connected with the first dipole antenna, the other end is in the first step structure, one end of second coupling part is connected with the second dipole antenna, the other end is in the second step structure；There are gaps between first step structure and the second step structure, and the protrusion of the first step structure and recess and the recess and protrusion of the second step structure are mutually matched.The invention further relates to the manufacturing methods of above-mentioned antenna.The present invention, which can optimize, to be subtracted ink, reduces label sizes and keep the reading distance farther out of label.
Description
Technical field
The present invention relates to flexible textile electronic technology fields, and antenna is identified more particularly to a kind of fabric base super high frequency radio frequency
And manufacturing method.
Background technology
With the continuous development of science and technology, when the traditional labour-intensive textile industry in China also steps into informationization
Generation, to being carried as the Internet of Things intelligent management of representative using RFID (Radio Frequency Identification) label technique
New challenge is gone out.RFID tag compared to the bar code of textile industry recent application, Quick Response Code for, especially hyperfrequency
(UHF, Ultra High Frequency) RFID tag, has that reading speed is fast, can store that data are big, read range is big, real
The advantages of showing multiple while reading and can wirelessly updating the data at any time.Although RFID after repeatedly technically with it is theoretic
Innovation, has evolved into the informationization technology of today's society the supreme arrogance of a person with great power, but there are still very when facing concrete application target environment
More technology restrictions.In textile garment field, RFID tag for clothes automated production and warehousing management, channel management,
Single quality control reason and Brand management etc., it is desirable that label production cost is low, backing material is preferably textile fiber material.
One basic RFID tag is made of the antenna and backing material of chip and coupling.In general, chip
Printed label prime cost is determined with electrically conductive ink.It is almost no longer reduced in chip cost and electrically conductive ink holds at high price
In the case of, it is unique selection to reduce electrically conductive ink dosage.The existing UHF RFID tags for textile garment field exist
It is various limitation or label relative cost is higher or snugness of fit is inadequate or antenna structure is complicated, ink consumption amount
It is too big, and reading distance is smaller, these problems will hinder UHF RFID further applying in textile garment field.
When UHF RFID tags be applied to textile and garment enterprise when, it is desirable that label have structural compactness, snugness of fit,
Durability, aesthetics and low cost are unsatisfactory for these requirements currently used for the antenna structure on clothes, some relevant technologies
Solution has been suggested.Chinese patent (patent publication No.：CN106650896A)《A kind of electronic tag for clothing and its making side
Method》In by making label antenna using the method for hot pressing on woven label, four layers are compounded to form electronic tag, although this side
Label made of method meets textile substrate and ruggedized characteristic, but complex manufacturing technology, and flexibility is poor, and using bending
Type dipole, ink consumption amount are larger.Chinese patent (patent publication No.：CN102667824A)《For the consumer goods it is whole with
Track label》A kind of bending dipole label antenna is proposed, using fabric stick-on label inlay.Although bending dipole compares straight line
The length of dipole antenna shortens, but antenna prepares consumed conductive material and do not reduce.Chinese patent (patent publication No.:
CN105260765A)《The RFID tag of washing mark uhf band based on silk screen printing》, substrate of the mark as antenna is washed with water,
Electrically conductive ink is printed on washing mark by way of silk-screen printing, chip is combined with substrate then, is finally encapsulated
Come, although solving label antenna applies the comfort on clothes, and there are certain read functions, it is
T matches dipole antenna configuration, and the size of label antenna is larger, and printing ink consumption is larger.Therefore, problem of the prior art
Be electrically conductive ink consumption it is larger, tag antenna dimension is either wide or long, occupies larger space in, aesthetics and
Concealment is poor.
Invention content
Technical problem to be solved by the invention is to provide a kind of fabric base super high frequency radio frequencies to identify antenna and manufacturing method,
Optimization subtracts ink, reduces label sizes and keep the reading distance farther out of label.
The technical solution adopted by the present invention to solve the technical problems is：A kind of fabric base super high frequency radio frequency identification day is provided
Line, including inductive coupling enhancing region, the first dipole antenna and the second dipole antenna, first dipole antenna and electricity
The left side in sense coupling enhancing region is connected, and the right side that second dipole antenna enhances region with inductive coupling is connected, the electricity
Sense coupling enhancing region includes the first coupling part and the second coupling part, one end and the first dipole antenna of first coupling part
It is connected, the other end is in the first step structure, and one end of second coupling part is connected with the second dipole antenna, and the other end is in the
Two step structures；There are gap between first step structure and the second step structure, and the first step structure
Protrusion and be recessed and the recess and protrusion of the second step structure is mutually matched.
The width of first coupling part is twice of the first dipole antenna.
The width of second coupling part is twice of the second dipole antenna.
The technical solution adopted by the present invention to solve the technical problems is：A kind of fabric base super high frequency radio frequency identification day is provided
The manufacturing method of line, includes the following steps：It is the substrate of printed antenna to select fabric, using linear type dipole antenna configuration,
Then electrically conductive ink is printed in substrate by the way of silk-screen printing, above-mentioned fabrics base hyperfrequency is formed after drying solidification
RFID antenna.
The fabric is high density fabric.
The electrically conductive ink uses conductive silver ink.
Advantageous effect
Due to the adoption of the above technical solution, compared with prior art, the present invention having the following advantages that and actively imitating
Fruit：The present invention reduces antenna length by increasing inductive coupling and enhancing region, greatly reduces electrically conductive ink consumption, protects simultaneously
Hold the reading distance farther out of respective labels；It is real in the small size and low cost for keeping label using common fabric as printed substrate
The flexibility, durability and aesthetics of label are showed.
Description of the drawings
Fig. 1 is dipole antenna configuration schematic diagram in the prior art；
Fig. 2 is the structural schematic diagram of the present invention；
Fig. 3 is the reading of several fabric base dipole antenna labels apart from schematic diagram.
Specific implementation mode
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, people in the art
Member can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Range.
Embodiments of the present invention are related to a kind of fabric base super high frequency radio frequency identification antenna, as shown in Fig. 2, including inductance coupling
Enhancing region, the first dipole antenna 1 and the second dipole antenna 2 are closed, first dipole antenna 1 enhances with inductive coupling
The left side in region is connected, and the right side that second dipole antenna 2 enhances region with inductive coupling is connected, the inductive coupling enhancing
Region includes the first coupling part 3 and the second coupling part 4, and one end of first coupling part 3 is connected with the first dipole antenna 1,
The other end is in the first step structure, and one end of second coupling part 4 is connected with the second dipole antenna 2, and the other end is in second
Step structure；There are gap 5 between first step structure and the second step structure, and the first step structure
Protrusion and recess and the recess and protrusion of the second step structure are mutually matched.The antenna structure is by increasing inductive coupling enhancing
Region and reduce antenna length, greatly reduce electrically conductive ink consumption, while keeping the reading distance farther out of respective labels；With general
Logical fabric is printed substrate, in the small size and low cost for keeping label, realizes the flexibility, durability and beauty of label
Property.
The linear type dipole antenna is the key that the present invention.Linear type and the design of meander configuration dipole antenna are wide
General use, typical structure are as shown in Figure 1.Obviously, the not long straight arm of the arm of meander configuration dipole antenna, carrys out back bending
It is bent so that the length of RFID tag shortens.Moreover, bent antenna arm path can be with long enough, to generate and linear type dipole antenna
The similar antenna gain of line.For RFID tag dipole antenna configuration shown in Fig. 1, compare with different sizes and tortuous knot
The simple dipole antenna of structure designs.
Theoretically, the performance of RFID tag is usually indicated by reading distance (r), can be come using the transmission formula of Frii
It calculates：
Wherein λ is wavelength, PtIt is the power transmitted by RFID reader, gtIndicate the gain of transmitting antenna, grIt indicates to receive
The gain of label antenna, PthIndicate that the threshold power of RFID chip work, p indicate the polarization loss factor, | s11|2Corresponding to black river
(Kurokawa) reflection coefficient of power.In China, RFID tag must in the 920-925MHz frequency ranges of hyper band work
Make.In addition, gtAnd PtMaximum level must not exceed 4.0 watts.Here, reflectance factor (s11) indicates given tag antenna structure
With the matched degree of RFID chip of attachment.Reflectance factor (s11) can be obtained by following formula
Wherein, ZaIndicate antenna impedance, ZcIndicate chip impedance.If antenna impedance ZaEqual to chip impedance ZcConjugation
Value, then antenna and RFID chip matching are good.Good design needs perfect conjugate impedance match condition.
Linear dipole sub-antenna is the citation form of dipole antenna design, as shown in Fig. 1 (b) due to simple in structure.Make
With linear dipole antennas for being that its length is long the shortcomings that printing UHF RFID tags.One standard straight-line dipole antenna is necessary
Long enough (0.5 λ of ≈), to reach the about 2.15dB antenna gains of half wavelength dipole theoretical calculation.Otherwise, arm it is shorter (<<
0.5 λ) the antenna gain of straight dipole sub-antenna can reduce.Due to usually requiring small ruler in the application environment of textile and garment enterprise
Very little UHF RFID tags, so growing straight dipole antenna and being unsatisfactory for application-specific demand.
In order to make long standard straight-line dipole antenna minimize, and the performance of small size antenna (electrical length) is close to ideal
Half-wave antenna, often use folding line, be exactly in the case that antenna performance loss acceptable realize antenna miniaturization.
The arm of tortuous dipole antenna is not long straight arm but is bent back and forth so that the length of RFID tag shortens.Bending is even
The electric current extremely continuously bent in son has opposite phase, can provide the reactance of capacitive and perception simultaneously, they cancel out each other, and draw
Resonant frequency is played to reduce.The antenna arm of bending can equally long enough, to generate day similar with standard straight-line dipole antenna
Line gain.But the bending dipole structure of equal length and linear dipole minor structure, the antenna of bent dipole minor structure need
The electrically conductive ink of consumption is more, and cost increases, and printing technology required precision is high, and reads distance relative to short dipole antenna
It is not much different.
Therefore, the present invention selects shorter linear type dipole antenna in antenna performance loss acceptable.
According to theoretical calculation, enhance region since induced current is mainly distributed on inductive coupling, the present invention is by changing inductive coupling ring
Realize small-sized antenna structure design.According to China's UHF ranges and aforementioned theory, keep almost suitable port Impedance matching and
Under gain condition, 0.25 shorter λ linear type dipole antennas are designed, and with the linear type dipole antenna of long 0.36 λ and
Compare between the tortuous dipole antenna of 0.25 λ.Label antenna proposed by the present invention has shorter and relatively narrow on the whole
Structure, printing needs less conductive ink, and practical reading performance hardly reduces.In addition, linear type antenna structure holds
Highly dense Woven Polyester Fabrics surface is easily imprinted on by silk-screen printing, printing effect is preferable, the case where printing out-of-flatness seldom occurs, from
And the conductive effect of label antenna is preferable, and then it is preferable to read effect.But fabric surface is difficult to full print folded dipole day
The narrow lines of line, especially under mechanical force, lines are susceptible to crack, lose the performance of antenna significantly.Finally, compared with
0.25 short λ linear type antenna structures reduce the size of label so that the label antenna is upper more convenient in application.
As depicted in figs. 1 and 2, wherein Fig. 1 (a) is standard straight-line dipole antenna, and size is 164mm × 2mm, and Fig. 2
For a kind of short straight line type dipole antenna configuration proposed by the present invention, length 82mm, width 7mm.It obviously can be seen that, at it
In the case of his parameter is identical, the quantity of ink that second of antenna structure is smaller, used is less, because to apply on clothes
Face, based on from the aspect of snugness of fit and cost, it is clear that second antenna structure it is more applicable.
The present invention another specific implementation mode be：By the antenna structure in Fig. 2, Printing screen is made, centainly to match
The electrically conductive ink of ratio controls antenna electric impedance operator；The fabric being ready for is completed on the bearing ink pad below halftone, then in net
A certain amount of electrically conductive ink is gone up in version, then applying certain pressure to scraper plate is printed on ink in printing base fabric, completes day
The printing of line；Then, the antenna produced is put into drying box, carries out heat and dries sintering curing；Finally, by the conduction on chip
Position and two contact point concrete mutuallies on label antenna, form UHF RFID tags.Furthermore it is possible in label antenna and chip
Surface applies layer protective layer, increases tagged durability, that is, completes the making of label.
Fig. 3 is the block diagram of several tag read distances, and as seen from the figure, the reading of this label antenna is reached apart from distant
To more than ten meters of reading distance, compared with tortuous dipole antenna, when using down cloth substrate, read apart from bigger, still
Used electrically conductive ink has lacked very much；Compared with 0.36 λ linear type dipole subtabs, the size of label antenna is reduced, but
It is to read range difference away from very little, this technical advantage and feasibility for further illustrating the present invention, because of one tag performance of evaluation
One of important technological parameters be exactly its reading distance.
It is not difficult to find that the novel UHF RFID tags small sized antenna of linear type plane dipole of the present invention, meets
In common fabric substrate prepared by silk-screen printing, have the characteristics that ink consumption amount is low, reading is apart from remote, while keeping fabric itself
Flexible, wearable property.
Claims (6)
1. a kind of fabric base super high frequency radio frequency identifies antenna, including inductive coupling enhancing region, the first dipole antenna and second
Dipole antenna, the left side that first dipole antenna and inductive coupling enhance region are connected, second dipole antenna and
The right side that inductive coupling enhances region is connected, which is characterized in that inductive coupling enhancing region includes the first coupling part and the
One end of two coupling parts, first coupling part is connected with the first dipole antenna, and the other end is in the first step structure, described
One end of second coupling part is connected with the second dipole antenna, and the other end is in the second step structure；First step structure
And second between step structure there are gap, and the protrusion of the first step structure and be recessed recessed with the second step structure
It falls into and protrusion is mutually matched.
2. fabric base super high frequency radio frequency according to claim 1 identifies antenna, which is characterized in that first coupling part
Width is twice of the first dipole antenna.
3. fabric base super high frequency radio frequency according to claim 1 identifies antenna, which is characterized in that second coupling part
Width is twice of the second dipole antenna.
4. a kind of manufacturing method of fabric base super high frequency radio frequency identification antenna, which is characterized in that include the following steps：Select fabric
Then conductive oil is inked by the way of silk-screen printing using linear type dipole antenna configuration for the substrate of printed antenna
System forms fabric base super high frequency radio frequency identification antenna as described in claim 1 in substrate after drying solidification.
5. the manufacturing method of fabric base super high frequency radio frequency identification antenna according to claim 4, which is characterized in that described to knit
Object is high density fabric.
6. the manufacturing method of fabric base super high frequency radio frequency identification antenna according to claim 4, which is characterized in that described to lead
Electric ink uses conductive silver ink.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810292441.1A CN108539375A (en) | 2018-03-30 | 2018-03-30 | A kind of fabric base super high frequency radio frequency identification antenna and manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810292441.1A CN108539375A (en) | 2018-03-30 | 2018-03-30 | A kind of fabric base super high frequency radio frequency identification antenna and manufacturing method |
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| Publication Number | Publication Date |
|---|---|
| CN108539375A true CN108539375A (en) | 2018-09-14 |
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| CN201810292441.1A Pending CN108539375A (en) | 2018-03-30 | 2018-03-30 | A kind of fabric base super high frequency radio frequency identification antenna and manufacturing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1459138A (en) * | 2001-03-15 | 2003-11-26 | 松下电器产业株式会社 | Antenna apparatus |
| CN1781115A (en) * | 2003-04-25 | 2006-05-31 | 艾利丹尼森公司 | Extended range RFID system |
| CN1835283A (en) * | 2005-03-17 | 2006-09-20 | 富士通株式会社 | Tag antenna |
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| US20080143620A1 (en) * | 2006-12-13 | 2008-06-19 | Ncr Corporation | Increasing the bandwidth of a RFID dipole tag |
| CN101855781A (en) * | 2007-10-11 | 2010-10-06 | 3M创新有限公司 | RFID label with modified model dipole antenna |
| CN102074785A (en) * | 2009-11-19 | 2011-05-25 | 艾迪讯科技股份有限公司 | RF (Radio-Frequency) identification tag antenna with double-ended open-coupling structure and design method thereof |
| CN201927700U (en) * | 2010-12-01 | 2011-08-10 | 华中科技大学 | Dipole antenna and RFID tag using same |
| US20120241521A1 (en) * | 2011-03-24 | 2012-09-27 | Samsung Techwin Co., Ltd. | Rfid tag antenna |
| CN203553335U (en) * | 2013-09-27 | 2014-04-16 | 南京铭旷电子科技有限公司 | Passive UHF omnidirectional compensation-type radio frequency identification antenna |
| CN103915682A (en) * | 2013-01-06 | 2014-07-09 | 华为技术有限公司 | Printed circuit board antenna and printed circuit board |
| CN104412450A (en) * | 2014-04-28 | 2015-03-11 | 华为终端有限公司 | Antenna and mobile terminal |
| CN104471790A (en) * | 2014-04-24 | 2015-03-25 | 华为终端有限公司 | Antenna, antenna system and communication device |
| CN105260765A (en) * | 2015-10-29 | 2016-01-20 | 东华大学 | Care label-based UHF RFID tag based on screen printing |
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2018
- 2018-03-30 CN CN201810292441.1A patent/CN108539375A/en active Pending
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|---|---|---|---|---|
| CN1459138A (en) * | 2001-03-15 | 2003-11-26 | 松下电器产业株式会社 | Antenna apparatus |
| CN1781115A (en) * | 2003-04-25 | 2006-05-31 | 艾利丹尼森公司 | Extended range RFID system |
| CN1835283A (en) * | 2005-03-17 | 2006-09-20 | 富士通株式会社 | Tag antenna |
| JP2008107947A (en) * | 2006-10-24 | 2008-05-08 | Toppan Printing Co Ltd | Rfid tag |
| US20080143620A1 (en) * | 2006-12-13 | 2008-06-19 | Ncr Corporation | Increasing the bandwidth of a RFID dipole tag |
| CN101855781A (en) * | 2007-10-11 | 2010-10-06 | 3M创新有限公司 | RFID label with modified model dipole antenna |
| CN102074785A (en) * | 2009-11-19 | 2011-05-25 | 艾迪讯科技股份有限公司 | RF (Radio-Frequency) identification tag antenna with double-ended open-coupling structure and design method thereof |
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| CN103915682A (en) * | 2013-01-06 | 2014-07-09 | 华为技术有限公司 | Printed circuit board antenna and printed circuit board |
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Application publication date: 20180914 |