ZA200601242B - Tag for radio frequency identification system - Google Patents
Tag for radio frequency identification system Download PDFInfo
- Publication number
- ZA200601242B ZA200601242B ZA200601242A ZA200601242A ZA200601242B ZA 200601242 B ZA200601242 B ZA 200601242B ZA 200601242 A ZA200601242 A ZA 200601242A ZA 200601242 A ZA200601242 A ZA 200601242A ZA 200601242 B ZA200601242 B ZA 200601242B
- Authority
- ZA
- South Africa
- Prior art keywords
- tag
- transponder
- carrier
- antenna arrangement
- electronic circuitry
- Prior art date
Links
- 238000000034 method Methods 0.000 claims description 8
- 125000006850 spacer group Chemical group 0.000 claims description 7
- 239000003989 dielectric material Substances 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 206010070670 Limb asymmetry Diseases 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 235000013405 beer Nutrition 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000012260 resinous material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000009517 secondary packaging Methods 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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
- G06K19/07758—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 arrangements for adhering the record carrier to further objects or living beings, functioning as an identification tag
-
- 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
-
- 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
- G06K19/07771—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 the record carrier comprising means for minimising adverse effects on the data communication capability of the record carrier, e.g. minimising Eddy currents induced in a proximate metal or otherwise electromagnetically interfering object
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Electromagnetism (AREA)
- Radar Systems Or Details Thereof (AREA)
Description
TAG FOR RADIO FREQUENCY IDENTIFICATION SYSTEM
This invention relates to radio frequency identification systems (RFID) and more particularly to a tag comprising a transponder for use in such a system, a system comprising tags and a method of producing tags.
RFID systems are well known in the art. However, the reading range of the known systems between a reader of the system and a transponder of the system is severely impaired by certain host articles for the transponders such as metal host articles or host containers containing a liquid. : OBJECT OF THE INVENTION
Accordingly, it is an object of the present invention to provide an alternative tag comprising a transponder, a carrier for the transponder, an
RFID system and a method of producing the tag with which the applicant believes the aforementioned disadvantages may at least be alleviated.
According to the invention there is provided a tag for use in a radio frequency identification (RFID) system; the. tag comprising a transponder comprising electronic circuitry connected to an antenna arrangement, the transponder being carried by a carrier comprising a body, the body being configured to encapsulate at least part of the electronic circuitry and to provide a dielectric spacer between the antenna arrangement and a host article.
The electronic circuitry by be provided on a chip and the chip may be encapsulated by the body. In a preferred embodiment the chip and antenna arrangement are encapsulated or embedded in the body.
The transponder may be any one or more of the following: a read only transponder, a read/write transponder, programmable transponder, passive transponder, active transponder, semi active transponder, operating at about 13.5MHz, operating at about 400MHz, operating in the 800MHz to 1100MHz band and even at about 2.45GHz. In a preferred embodiment, the transponder is a passive transponder which in use derives power from an energizing signal transmitted by a reader or interrogator of the RFID system.
The carrier body may comprise attachment means for attaching the carrier to the host article. The carrier may be of unitary construction. The carrier may be cast or moulded integrally from a suitable dielectric material such as a resinous material, epoxy, plastics material, cement, concrete wood, glass, paper, wax, cloth straw, rubber etc. In one presently preferred embodiment, the material is a high impact resistant material such as high density polyethylene. The aforementioned spacer may in some embodiments comprise an air gap.
The invention further includes within its scope a carrier for a transponder as herein defined and/or described.
The invention also extends to a radio frequency identification system comprising at least one reader and a plurality of tags as herein defined and/or described. still further included in the scope of the invention is a method of producing a radio frequency (RF) tag, the method comprising the steps of: - providing an RF transponder comprising electronic circuitry and an antenna arrangement; - encapsulating at least part of the circuitry in a dielectric body of a carrier for the transponder; and - configuring the body to provide a dielectric spacer between the antenna arrangement and a host article on which the tag is carried in use.
The method may further comprise the step of configuring the carrier body to provide integral means for attaching the carrier to the host article.
The invention will now further be described, by way of example only, with reference to the accompanying diagrams, wherein figure 1 is a block diagram of a radio frequency identification system comprising tags according to the invention; figure 2 is an exploded view of a gas bottle and tag according to the invention; figure 3 is a perspective view of the tag mounted on the gas bottle; figure 4 is a section on line IV in figure 2; figure 5 is a section on line V in figure 2; figure 6 is a diagrammatic perspective view of a second embodiment of the tag according to the invention; and figure 7 is a section on line Vil in figure 6.
A radio frequency identification (RFID) system is generally designated by the reference numeral 10 in figure 1.
The system 10 comprises at least one reader or interrogator 12 and a plurality of tags 14.1 to 14.n of a tag population 14. In use, the tags are attached to or otherwise associated with respective host articles 16.1 to -46.n. - During - operation, the reader broadcasts an energizing or interrogation signal 18 towards the tag population 14 on the host articles.
Each tag responds to the signal, for example by backscatter modulating the energizing signal, with a respective response signal 20.1 to 20.n carrying data stored in a memory arrangement of the transponder. The reader sequentially locks onto these response signals and reads the data.
The data so read is used in known manner by the reader to count and/or identify the tags 14.1 to 14.n and hence the host articles.
The tags are similar in configuration and therefore only tag 14.1 will be described in more detail hereinafter. The tag comprises an RF transponder 22 comprising electronic circuitry integrated on a chip 24, typically on
ASIC. The chip is connected to an antenna arrangement 26. The transponder is provided on a carrier 28, sometimes also referred to as secondary packaging, comprising a body 30 as will hereinafter be described. The body 30 comprises attachment means 32 for securing the body to the host article 16.1, as will also be described hereinafter.
A first embodiment of the tag 14.1 according to the invention and for use on a host article 16.1 in the form of a gas bottle is shown in figures 2 to 5.
The gas bottle 16.1 comprises a metal body 42 and at one end thereof a metal valve mechanism 44 defining an outlet 46 and a manually operable metal wheel 48 for opening and closing the valve. The mechanism 44 is circumscribed by a protective metal shroud 50 comprising a top member 52 having a shape in the form of 2 circle segment. | .
The body 30 of the tag 14.1 is moulded from a dielectric material such as high density polyethylene. As best shown in figure 4, the attachment means 32 comprises a channel 54 defined in the body between parts 56 and 58 of the body. The body is a pressure and tight fit on shroud 50 with member 52 received in channel 54, so that parts 56 and 58 straddle member 52 and tightly clamp the body onto the member 52, under the influence of plastic memory in the body. Hence, the carrier 28 is of unitary construction in that the attachment means 32 is formed integrally with the body 30.
As best shown in figures 4 and 5, the transponder 22 is embedded in the body 30. Part of the dielectric body 30 in use provides a dielectric spacer 60 of width W between the antenna arrangement 26 and the metal member 52. This member may in use function as a reflector or backplane associated with the antenna arrangement. The width W may be determined empirically and may differ for different kinds and configurations of reflectors 52 andlor dielectric materials for body 30. In some applications a width W of about 15mm was found to give surprisingly good results in terms of reading range between reader 12 and transponder 14.1.
The body 30 may be colour coded or given a unique shape for articles of a particular kind, for example the unique shape and configuration of the tag body 30 shown in figures 2 and 3 for gas bottles.
A second embodiment of the tag 114.1 according to the invention is shown in figures 6 and 7. The transponder 22 comprising chip 24 and antenna arrangement 26 is embedded in a carrier body 30. The body is attachable to a host article 16.1 by double sided adhesive tape 62, for example. The distance W provided by part 64 of the body 30 between the antenna arrangement 26 and the host article may be determined empirically. With a suitable distance W, the metal bar 16.1 may act as a reflector or backplane for the antenna arrangement 26 of the transponder 22. The resulting reading ranges between the reader 12 and the tags to be read have been found surprisingly far to exceed the realistically expected ranges.
Hence, the carrier 28 according to the invention provides protection for at least part of the circuitry 24, enables the transponder 22 to be mounted on a host article 16.1 and provides dielectric separation W between the antenna arrangement 26 and the host article 16.1 which may be made of a metal and/or contain a liquid. It has been found that with suitable selection of the separation W, reading range reduction as a result of the adjacent host may not only be reduced, but the range may even be improved compared to that for free space.
Tags according to the invention may be configured to be hosted by host articles such as gas bottles, beer barrels, fire extinguishers, roll cages,
waste bins, other returnable and reusable containers, cable drums, wheels, valve mechanisms, vehicles, plant, trailers, licence plates, road furniture, utility poles, rolling stock, pallets and animals. The tag may be attached to the host article by crimping, gluing, welding, press fitting, tying onto, bonding, wrapping, screwing, bolting, clamping etc.
The antenna arrangement 26 may comprise any suitable antenna arrangement such as a dipole, folded dipole, shortened dipole, loaded dipole etc. The dipole may have any suitable configuration such as the linear arrangement of figures 6 and 7. In other tags, non-linear configurations may be utilized such as the part circle configuration best shown in figure 5. In yet other embodiments angled, preferably right angled configurations, with equal or unequal leg lengths may be used. The circular and angled configurations make the tag polarization independent 18 on the plane of the circle or angled configuration.
Claims (11)
1. A tag for use in a radio frequency identification (RFID) system, the tag comprising a transponder comprising electronic circuitry connected to an antenna arrangement, the transponder being carried by a canier comprising a body, the body being configured to encapsulate at least part of the electronic circuitry and to provide a dielectric spacer between the antenna arrangement and a host article.
2. A tag as claimed in claim 1 wherein the body is configured to comprise attachment means for attaching the carrier to the host article.
3. A tag as claimed in claim 2 wherein the body and attachment means are of unitary construction.
4. A tag as claimed in claim 3 wherein the body is cast from a suitable dielectric material.
5. A tag as claimed in any one of claims 1 to 4 wherein the electronic circuitry is provided on a chip and the chip is encapsulated by the body.
6. A tag as claimed in claim 5 wherein the chip and antenna arrangement are encapsulated by the body.
7. A tag as claimed in any one of claims 1 to 6 wherein the transponder is a passive transponder which in use derives power from an energizing signal transmitted by a reader of the RFID system.
8. A carrier for a transponder comprising electronic circuitry and an antenna arrangement, the carrier comprising a body configured to encapsulate at least part of the electronic circuitry and to provide a dielectric spacer between the antenna arrangement and a host article on which the carrier is mounted in use.
9. A radio frequency identification system comprising at least one reader and a plurality of tags as claimed in any one of claims 1 to 7.
10. A method of producing a radio frequency (RF) tag, the method comprising the steps of: - providing an RF transponder comprising electronic circuitry and an antenna arrangement; - "encapsulating at least part of the circuitry in a dielectric body of a carrier for the transponder; and
. configuring the body to provide a dielectric spacer between the antenna arrangement and a host article in use.
11. A method as claimed in claim 10 comprising the step of configuring the carrier body to provide integral means for attaching the carrier to the host article.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ZA200601242A ZA200601242B (en) | 2003-07-09 | 2006-02-09 | Tag for radio frequency identification system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ZA200305294 | 2003-07-09 | ||
ZA200601242A ZA200601242B (en) | 2003-07-09 | 2006-02-09 | Tag for radio frequency identification system |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA200601242B true ZA200601242B (en) | 2007-05-30 |
Family
ID=34063715
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA200601242A ZA200601242B (en) | 2003-07-09 | 2006-02-09 | Tag for radio frequency identification system |
Country Status (2)
Country | Link |
---|---|
WO (1) | WO2005006248A1 (en) |
ZA (1) | ZA200601242B (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6951596B2 (en) | 2002-01-18 | 2005-10-04 | Avery Dennison Corporation | RFID label technique |
US7500307B2 (en) | 2004-09-22 | 2009-03-10 | Avery Dennison Corporation | High-speed RFID circuit placement method |
TW200707301A (en) * | 2005-05-25 | 2007-02-16 | Ibm | ID tag package and RFID system |
US7555826B2 (en) | 2005-12-22 | 2009-07-07 | Avery Dennison Corporation | Method of manufacturing RFID devices |
WO2007141733A2 (en) * | 2006-06-09 | 2007-12-13 | Idtek Track-And-Trace Sa | Bottle of gas including a transponder |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19510458A1 (en) * | 1995-03-24 | 1996-09-26 | L & S Logistic & Software Gmbh | Microchip and coil transponder device for mounting on container |
US6608561B2 (en) * | 1998-05-19 | 2003-08-19 | Meat Processing Service Corp., Inc. | Method for making a radio frequency identification device |
FR2814574B1 (en) * | 2000-09-22 | 2003-11-28 | Gemplus Card Int | NON-CONTACT ELECTRONIC LABEL FOR CONDUCTIVE SURFACE PRODUCT |
-
2004
- 2004-07-09 WO PCT/IB2004/051187 patent/WO2005006248A1/en active Application Filing
-
2006
- 2006-02-09 ZA ZA200601242A patent/ZA200601242B/en unknown
Also Published As
Publication number | Publication date |
---|---|
WO2005006248A1 (en) | 2005-01-20 |
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