CN111898722A - Hollowed-out dipole antenna and printing RFID (radio frequency identification) label - Google Patents
Hollowed-out dipole antenna and printing RFID (radio frequency identification) label Download PDFInfo
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- CN111898722A CN111898722A CN202010685892.9A CN202010685892A CN111898722A CN 111898722 A CN111898722 A CN 111898722A CN 202010685892 A CN202010685892 A CN 202010685892A CN 111898722 A CN111898722 A CN 111898722A
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- 238000007639 printing Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 4
- 229910021389 graphene Inorganic materials 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 230000008054 signal transmission Effects 0.000 abstract description 4
- 238000013461 design Methods 0.000 description 15
- 239000000758 substrate Substances 0.000 description 5
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000007650 screen-printing Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 238000007646 gravure printing Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000007641 inkjet printing Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000002894 chemical waste Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007647 flexography Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007603 infrared drying Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/0772—Physical layout of the record carrier
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
- G06K19/07773—Antenna details
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Details Of Aerials (AREA)
Abstract
The invention discloses a hollowed-out dipole antenna and a printed RFID (radio frequency identification) tag. The total energy loss in the signal transmission process is reduced by reducing the resistance, and the feedback signal performance of the RFID label is improved while the printing area of the antenna is reduced.
Description
Technical Field
The invention relates to a hollow dipole antenna and a printing RFID label with the hollow dipole antenna, belonging to the technical field of printing RFID labels.
Background
The mainstream RFID label antenna in the market at present mainly adopts PET substrate + aluminium foil etching process, has advantages such as low cost, stable performance, but the etching production technology can produce a large amount of chemical waste liquid, and along with RFID application constantly develops simultaneously, PET substrate can't degrade also be a problem that needs to consider in the abandonment processing after the RFID label uses.
The printing RFID antenna is used as an important supplement besides a PET substrate and aluminum foil etching process, and has the advantages that the antenna production process is environment-friendly, and the substrate can be made of degradable materials such as paper. The RFID antenna is produced by adopting a printing process, and the printable conductive paste is a main raw material and is a main component of the production cost. How to reduce the cost is an important issue for solving the development of printed antennas.
The current common method for reducing the cost comprises the steps of reducing the printing area by adopting a hollow design and reducing the consumption of conductive paste; however, the ability of the antenna with the hollow design to feed back signals is reduced compared with the antenna without the hollow design.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a hollow dipole antenna and a printing RFID label, and solves the technical problem that the feedback capacity of the hollow antenna is reduced in the prior art.
In order to solve the technical problem, the invention provides a hollowed-out dipole antenna which is characterized by comprising a dipole antenna, wherein each arm of the dipole antenna forms a hollowed-out area, and cross line joint lines are added in the hollowed-out areas so that the insides of the hollowed-out areas are mutually communicated.
Furthermore, the lower limit of the width of the line at the edge of the hollow area is not less than 0.1mm, and the upper limit is not more than 3 mm.
Further, the width of the line at the edge of the hollow area is 0.2 mm.
Furthermore, the cross line node lines are in a # shape and are in a grid shape or a polygonal honeycomb shape.
Furthermore, the lower limit of the width of the node line of the cross line is not less than 0.1mm, and the upper limit is not more than 3 mm.
Further, the cross-line junction line width was 0.2 mm.
Furthermore, the lower limit of the distance between the crossed line node lines is not less than 0.5mm, and the upper limit is not more than 10 mm.
Correspondingly, the invention also provides a printing RFID label which is characterized by comprising a base material, wherein the conductive paste is printed on the base material by adopting a printing mode to form the hollow dipole antenna, and the hollow dipole antenna is connected with a chip through an inductance coil.
Further, the printing method includes various printing processes such as flexography, screen printing, gravure, inkjet and the like.
Further, the conductive paste includes, but is not limited to, printable materials prepared from conductive materials such as silver powder, copper powder or a mixture thereof, graphene, and the like.
Compared with the prior art, the invention has the following beneficial effects: according to the invention, the cross line node lines are added to the hollow parts, so that the interiors of the hollow areas are mutually communicated, the total energy loss in the signal transmission process is reduced by reducing the resistance, the antenna printing area is reduced, and meanwhile, the feedback signal performance of the RFID tag is improved.
Drawings
FIG. 1 is a schematic block diagram of a prior art RFID tag;
FIG. 2 is a schematic diagram of a hollowed-out dipole antenna;
fig. 3 is a schematic diagram of the pierced dipole antenna of the present invention.
Reference numerals: 1. a dipole antenna; 2. an inductor coil; 3. and (3) a chip.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
In the description of the present patent application, it is noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.
In the description of the present patent, it is to be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present patent and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present patent. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present patent application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present patent can be understood in a specific case by those skilled in the art.
The noun in the present invention explains:
printing type antenna: the conductive paste is uniformly coated on paper, films and other base materials by printing equipment such as a flexible plate, a screen printing plate, a gravure printing plate, an ink-jet printing plate and the like, and a conductive circuit is formed by heating, infrared drying, natural drying and the like.
Conductive slurry: the conductive material such as silver powder, copper powder or a mixture thereof, graphene and the like is added with a solvent and a dispersant to form a material which can be printed or jet-printed.
An RFID chip: demodulating the input signal, reacting appropriately, modulating the backscatter signal, modeling with resistors and capacitors.
Dipole: and the largest part of the RFID tag antenna realizes long-distance communication.
An inductance coil: resonates with the tag chip's capacitance, providing power/signals to the RFID tag chip.
A coupling part: power transfer between the dipole and the inductive loop, most dipole designs use inductive coupling similar to a transformer.
The invention conception of the invention is as follows: according to the invention, the cross line node lines are added to the hollow parts, so that the interiors of the hollow areas are mutually communicated, the total energy loss in the signal transmission process is reduced by reducing the resistance, the antenna printing area is reduced, and meanwhile, the feedback signal performance of the RFID tag is improved.
The prior art RFID tag mainly includes: the chip is made of monocrystalline silicon and is used for receiving and transmitting a signal device; the chip is embedded in an annular inductance coil, the inductance coil is embedded in the middle of the dipole antenna, the bottom of the inductance coil is connected with the dipole as a coupling part, the dipole is in a bilateral symmetry structure, and the dipole can be a straight wire or a more complex cage-shaped or bat-wing-shaped antenna and the like.
A conventional dipole antenna is shown in fig. 1, where two arms of the dipole antenna are the field areas.
Referring to fig. 2, the field area of the original dipole antenna is designed to be hollowed, and each arm of the dipole antenna forms a hollowed area, so that more printing areas can be reduced, and the consumption of conductive paste can be reduced.
The width of the lines at the edge of the hollow pattern is in direct proportion to the area of the antenna, and theoretically, the smaller the width is, the better the width is; experiments show that the lower limit of the line width is not less than 0.1mm, and the upper limit is not more than 3 mm. According to the invention, the antenna areas of the original dipole antenna and the dipole antenna after the hollow design are compared, the widths of the hollow edge lines of the hollow dipole antenna are respectively 1.0mm, 0.8mm, 0.6mm, 0.4mm and 0.2mm, and the comparison data are shown in the following table in detail.
In conclusion, the printing area can be reduced by 90% at most after the hollowed-out design compared with the original dipole design, and the consumption of the conductive paste can be correspondingly saved by 90%.
And (3) testing the performance after hollowing out:
after the hollowed dipole antenna is subjected to scanning test by professional equipment, the performance curve is compared with the original solid dipole before modification, the performance curve is basically consistent, but the energy of the feedback signal is reduced to some extent, and the dipole antenna can be applied to general application scenes with low requirements on tag reading performance.
The width design of various hollowed-out pattern edge lines in the hollowed-out dipole antenna can meet the requirement of the original design (the UHF sensitivity difference is within 3 db), but the signal feedback capacity is poor; meanwhile, scanning curves designed according to line widths of different hollow-out patterns are kept consistent (UHF sensitivity difference is within 3 db), and the line width has small influence on the antenna performance; wherein the print area of the line width of 0.2mm is the smallest and the conductive paste used is the smallest.
In order to improve the signal feedback capacity of the hollowed dipole antenna, the total energy loss resistivity in the signal transmission process can be reduced by adopting a resistance reducing mode. It is known that the resistivity R is inversely proportional to the cross-sectional area S. According to the antenna, the cross line node lines are added in the hollow areas, so that the interiors of the hollow areas are mutually communicated, the antenna printing area S is enlarged, and the R is reduced under the condition that other parameters are not changed.
For the design of the intersection line and the node line of the hollowed-out area, referring to fig. 3, various forms such as a # -shaped grid shape, a polygonal honeycomb shape and the like which can enable the interiors of the hollowed-out areas to be communicated with each other can be used; the node line width is proportional to the antenna area, and theoretically the smaller the size the better. The lower limit of the width of the node line is not lower than 0.1mm and the upper limit is not more than 3 mm; the lower limit of the distance between the node lines is not less than 0.5mm, otherwise the dosage of the conductive paste can be obviously increased, the upper limit is not more than 10mm, otherwise the improvement of the promotion performance is not facilitated. According to the method, the areas of the original dipole antenna and the antenna of the dipole antenna after the hollowed design are compared, the hollowed edge line width of the hollowed dipole antenna is the same as the cross line node line width, the hollowed edge line width is 1.0mm, 0.8mm, 0.6mm, 0.4mm and 0.2mm, and the comparison data are shown in the following table in detail.
In conclusion, the printing area of the antenna after the optimized design can be reduced by 80% at most compared with the original design, and the consumption of the conductive paste can be saved by 80% correspondingly.
And (4) testing the optimized performance: after the optimized product is subjected to scanning test by professional equipment, the performance curve is compared with the original design before modification, the product performance is kept consistent and is not changed, and the product can replace the product of the original design.
The problem of poor feedback energy of the hollow antenna signal can be effectively solved by adding the crossed line node lines in the hollow area; scanning curves designed by different cross line node widths are kept consistent (UHF sensitivity difference is within 3 db), and the influence of the cross line node line width on the antenna performance is small; wherein the printing area of the 0.2mm cross line node line width is minimum, and the used conductive paste is minimum.
Correspondingly, based on the hollowed-out dipole antenna, the printed RFID tag comprises a base material, wherein the conductive paste is printed on the base material in a printing mode to form the hollowed-out dipole antenna, and the hollowed-out dipole antenna is connected with a chip through an inductance coil.
The substrate includes paper, film and other flexible materials of various types. The printing method comprises various printing processes such as flexible printing, screen printing, gravure printing, ink jet printing and the like. The conductive paste used includes, but is not limited to, printable materials prepared from conductive materials such as silver powder, copper powder or mixtures thereof, graphene, and the like.
The printing RFID label reduces the printing area of the antenna and improves the performance of the RFID label at the same time.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The hollow dipole antenna is characterized by comprising a dipole antenna, wherein each arm of the dipole antenna forms a hollow area, and cross line joint lines are added in the hollow areas to enable the interiors of the hollow areas to be communicated with one another.
2. The hollowed dipole antenna according to claim 1, wherein the lower limit of the line width of the edge of the hollowed area is not less than 0.1mm, and the upper limit is not more than 3 mm.
3. The pierced dipole antenna as recited in claim 1, wherein the width of the line at the edge of the pierced area is 0.2 mm.
4. The fretted dipole antenna according to claim 1, wherein the cross-line nodal lines are in a # shape grid or a polygonal honeycomb shape.
5. The fretted dipole antenna according to claim 1, wherein the lower limit of the width of the cross line node line is not less than 0.1mm, and the upper limit is not more than 3 mm.
6. The fretted dipole antenna according to claim 1, wherein the cross line node line width is 0.2 mm.
7. The fretted dipole antenna according to claim 1, wherein the distance between the cross line node lines has a lower limit of not less than 0.5mm and an upper limit of not more than 10 mm.
8. A printing RFID tag is characterized by comprising a base material, wherein conductive paste is printed on the base material in a printing mode to form the hollow dipole antenna, and the hollow dipole antenna is connected with a chip through an inductance coil.
9. The printed RFID tag of claim 8, wherein the printing comprises flexographic, screen, gravure, inkjet, and other types of printing processes.
10. The printed RFID tag of claim 8, wherein the conductive paste comprises but is not limited to a printable material made of conductive materials such as silver powder, copper powder or a mixture thereof, graphene, and the like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010685892.9A CN111898722A (en) | 2020-07-16 | 2020-07-16 | Hollowed-out dipole antenna and printing RFID (radio frequency identification) label |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010685892.9A CN111898722A (en) | 2020-07-16 | 2020-07-16 | Hollowed-out dipole antenna and printing RFID (radio frequency identification) label |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111898722A true CN111898722A (en) | 2020-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010685892.9A Pending CN111898722A (en) | 2020-07-16 | 2020-07-16 | Hollowed-out dipole antenna and printing RFID (radio frequency identification) label |
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| Country | Link |
|---|---|
| CN (1) | CN111898722A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060176236A1 (en) * | 2005-01-28 | 2006-08-10 | Dieter Homolle | Film having an imprinted antenna |
| CN203982430U (en) * | 2014-08-19 | 2014-12-03 | 诺瓦特伦（杭州）电子有限公司 | A kind of dipole RF passive electronic tag |
| CN106909961A (en) * | 2015-12-23 | 2017-06-30 | 华大半导体有限公司 | A kind of anti-demolition electronic tags |
| CN108565550A (en) * | 2018-03-29 | 2018-09-21 | 东华大学 | A kind of hollow type dipole antenna and fabric base UHF RFID tags |
-
2020
- 2020-07-16 CN CN202010685892.9A patent/CN111898722A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060176236A1 (en) * | 2005-01-28 | 2006-08-10 | Dieter Homolle | Film having an imprinted antenna |
| CN203982430U (en) * | 2014-08-19 | 2014-12-03 | 诺瓦特伦（杭州）电子有限公司 | A kind of dipole RF passive electronic tag |
| CN106909961A (en) * | 2015-12-23 | 2017-06-30 | 华大半导体有限公司 | A kind of anti-demolition electronic tags |
| CN108565550A (en) * | 2018-03-29 | 2018-09-21 | 东华大学 | A kind of hollow type dipole antenna and fabric base UHF RFID tags |
Non-Patent Citations (1)
| Title |
|---|
| J. SIDEN 等: "Reduced Amount of Conductive Ink with Gridded Printed Antennas", POLYTRONIC 2005 - 5TH INTERNATIONAL CONFERENCE ON POLYMERS AND ADHESIVES IN MICROELECTRONICS AND PHOTONICS, pages 1 - 4 * |
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