AU2009351695A1 - An improved high frequency antenna - Google Patents
An improved high frequency antenna Download PDFInfo
- Publication number
- AU2009351695A1 AU2009351695A1 AU2009351695A AU2009351695A AU2009351695A1 AU 2009351695 A1 AU2009351695 A1 AU 2009351695A1 AU 2009351695 A AU2009351695 A AU 2009351695A AU 2009351695 A AU2009351695 A AU 2009351695A AU 2009351695 A1 AU2009351695 A1 AU 2009351695A1
- Authority
- AU
- Australia
- Prior art keywords
- antenna
- high frequency
- rfid
- read range
- tuning circuit
- Prior art date
- 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.)
- Granted
Links
- 238000005516 engineering process Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000013475 authorization Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000000126 substance 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
-
- 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
- H01Q1/2216—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 interrogator/reader equipment
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Details Of Aerials (AREA)
- Support Of Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
The present invention discloses an antenna having extended read range for radio frequency identification implementations (RFID) using a tuning circuit (101) for setting operating frequency and read range, an antenna (102) which can be customised in shape and size, a coaxial cable (103) connected to the tuning circuit (101) and terminating at a computer using a BNC connector (105), that connects to the computer through a high frequency reader (106), a plastic casing (104) for housing all the components and an application software (107) for reading and displaying information.
Description
WO 2011/025353 PCT/MY2009/000127 AN IMPROVED HIGH FREQUENCY ANTENNA The present invention relates to radio frequencies. More particularly, the present invention relates to an improved antenna having an extended read range for radio 5 frequency identification implementations (RFID). BACKGROUND TO THE INVENTION Radio frequency identification RFID is a technology similar in theory to bar code 10 identification. With RFID, the electromagnetic coupling in the radio frequency portion of electromagnetic spectrum is used to transmit signals. Typically, an RFID system consists of an antenna or coil, a transceiver with a decoder and a transponder or RF tag electronically programmed with unique information in it. The antenna emits radio signals to activate the tag and to read and write data to it. Antennas are the conduits 15 between the tag and the transceiver, which controls the system's data acquisition and communication. Antennas are available in a variety of shapes and sizes; they can be built into a door frame to receive tag data from persons or mounted on specially designed walkways in shopping malls. The electromagnetic field produced by an antenna can be constantly present when multiple tags are expected continually. RFID 20 tags come in a wide variety of shapes and sizes. Animal tracking tags, inserted beneath the skin, can be as small as a pencil lead in diameter and one-half inch in length. The significant advantage of all types of RFID systems is the non-contact, non-line-of sight nature of the technology. Tags can be read through a variety of substances such 25 as snow, fog, ice, paint, and other visually and environmentally challenging conditions, where barcodes or other optically read technologies would be useless. The read/write capability of an active RFID system is also a significant advantage in interactive applications such as inventory or maintenance tracking. Though it is a costlier technology (compared with barcode), RFID has become indispensable for a wide 30 range of automated data collection and identification applications that would not be possible otherwise.
WO 2011/025353 PCT/MY2009/000127 2 However, commercially available RFID systems come with a limited. read range characteristics and fixed antenna size. This type of implementation limits the usage of the RFID and therefore does not maximize the potential of the technology. It is highly desirable to provide an RFID implementation having an improved read range 5 characteristics and a customizable antenna size structure to address these shortcomings. SUMMARY OF THE INVENTION It is a first object of the present invention to provide a high frequency antenna with 10 extended read range capability. It is a second object of the present invention to provide an antenna which can be customised in size and shape. 15 According to the first aspect of the present invention, there is provided a high frequency antenna with an extended read range capability by using a tuning circuit capable of setting the operating frequency according to the desired implementation. In yet another aspect of the present invention, an antenna with customizable size and 20 shape is achieved by aligning the antenna circuitry to follow the desired read range capability. BRIEF DESCRIPTION OF THE DRAWINGS 25 The present invention will now be described in greater detail, with reference to the accompanying drawing, in which: Figure 1 is a schematic diagram showing implementation of a high frequency antenna according to an embodiment of the invention; and 30 Figure 2 is a perspective view of a high frequency antenna according to an embodiment of the present invention.
WO 2011/025353 PCT/MY2009/000127 3 DETAILED DESCRIPTION OF THE DRAWINGS Referring to Figure 1, a high frequency antenna of the present invention consists mainly of a tuning circuit 101, an antenna 102, a coaxial cable 103 with variable 5 length, a plastic casing 104, a male BNC connector 105 that is connected to a high frequency reader 106 that acts as an intermediate device to obtain information from the antenna 102 and transmit the information to an application software installed in a computer 107. The connection between the computer and the HF Reader is through RS232. 10 The tuning circuit 101 is used to set the desired frequency for the operations of the RFID. The operating frequency is pivotal to the successful implementation of the present invention as the RF tag will also operate at the same frequency enabling the circuit board or antenna 102 to read information from the RF tag. The present 15 invention operates at a frequency of 13.56 MHz at 50 ohms impedence but is not limited to this frequency. The frequency may be tuned for different implementations. Still referring to Figure 1, the tuning circuit 101 is connected by circuitry to the loop of the antenna 102 that is made with a copper tape. The antenna 102 is used to activate 20 the RFID tags to read information from RF tags and relay that information using a coaxial cable 103 to an application software via the high frequency reader 106. The application software is able to display information from the RF tag, write information to the RF tag and enable / disable security measures. The antenna 102 used in the present invention comprise of an antenna loop made of copper and other fixed 25 elements such as variable capacitors, resistors and high speed switching diodes. The resonance tuning of the circuit board or antenna 102 of 13.56 MHz is achieved by using mica capacitors approximating to 100pF. The fixed elements include variable capacitors of which the value ranges from 1OnF to 60nF; all connected in parallel to 30 allow tuning of the antenna 102. The capacitor legs are modified to allow them to be soldered. A 40KD, 2 Watt thick film resistor, adjusts the Q factor of the antenna 102.
WO 2011/025353 PCT/MY2009/000127 4 The Q factor in general is used to measure the output of an antenna 102. The switching diode is used for switching the frequency bands. The antenna 102 is uniquely shaped to follow the plastic casing 104 thus allowing a 5 larger read radius of up to 30cm from the base. The antenna 102 can be customised to different size and different read radius which is among the novel features of the present invention. Information relay from the antenna 102 to the application software is performed using 10 a coaxial cable 103 that is connected to the tuning circuit 101 and the information will then be passed to the computer 107 through the high frequency reader 106 with the coaxial cable ending with BNC connector 105. Most commercially available computers comes with a female BNC receiver built in the circuit board therefore not requiring any additional hardware cost for the implementation of the present invention. 15 In addition, the plastic casing 104 used in the present invention offers the advantage of weight and mobility while still maintaining overall durability and also protects the antenna and tuning circuit Referring to Figure 2, a high frequency antenna 201 in a preferred embodiment of the 20 invention is a cubical shape enclosed by a housing 202. A coaxial cable 203 extends out of the housing 202 and connects to the computer (not shown) via the high frequency reader 106. Preferably, the housing 202 is having, but not limited to, a dimension of 32 cm x 39.5 cm x 3.1 cm. 25 The present invention will now be described by way of an example EXAMPLE 30 In a preferred embodiment, the present invention can be used in a library for tracking of tagged books. The books can be checked out for borrowing and checked in upon return of the books. The antenna will be able to read approximately 30 cm from the base enabling more books to be read at a time. This will depend on the thickness of WO 2011/025353 PCT/MY2009/000127 5 each book. All scanned books from the antenna will display information of the book and details of the borrower in the application software running on a standard computer. 5 The antenna can also be used to activate or deactivate a surveillance system or Electronic Article Surveillance (EAS) which is an anti-theft feature that is available within the RFID tag. Typically, EAS systems are used to electronically detect goods with tag that have not been authorised when they are removed from a retailer. For this application, this system will be able to detect if a book is leaving the library premises 10 without being checked out first (or the EAS being disabled upon borrowing the book). In an event if the book with enabled EAS is taken out from the library that passes through a gate antenna, an alarm will go off alerting the library personnel that the book is taken out from the library by an unauthorised person or it's taken without being borrowed with authorisation.
Claims (1)
1. An antenna having extended read range for radio frequency identification implementations (RFID), wherein the antenna comprising a tuning circuit (101) for 5 setting an operating frequency and read range, an antenna (102) which can be customised in size and aligned by circuitry to follow the desired read range capability, a coaxial cable (103) having a first end connected to the tuning circuit (101) and a second end connected to a computer (107) by way of a connector (105) that is connected to a high frequency reader (106), a housing (104) and an application 10 software for reading and displaying information.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/MY2009/000127 WO2011025353A1 (en) | 2009-08-28 | 2009-08-28 | An improved high frequency antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2009351695A1 true AU2009351695A1 (en) | 2012-02-02 |
| AU2009351695B2 AU2009351695B2 (en) | 2013-10-24 |
Family
ID=41202784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2009351695A Ceased AU2009351695B2 (en) | 2009-08-28 | 2009-08-28 | An improved high frequency antenna |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JP2013503551A (en) |
| KR (1) | KR101569161B1 (en) |
| AU (1) | AU2009351695B2 (en) |
| SG (1) | SG177695A1 (en) |
| TW (1) | TW201133352A (en) |
| WO (1) | WO2011025353A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI554268B (en) * | 2014-08-13 | 2016-10-21 | 研華股份有限公司 | Electronic medicine containing device, system for dispensing medicines and method thereof |
| US10812148B1 (en) * | 2020-03-06 | 2020-10-20 | Avid Indentification Systems, Inc. | Variable-Q antenna coil circuit for RFID applications |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8814993U1 (en) * | 1988-01-04 | 1989-03-02 | Oppermann, Richard, 7762 Ludwigshafen, De | |
| MXPA04006667A (en) * | 2002-01-09 | 2005-05-27 | Meadwestvaco Corp | Intelligent station using multiple rf antennae and inventory control system and method incorporating same. |
| JP2007164479A (en) * | 2005-12-14 | 2007-06-28 | Matsushita Electric Ind Co Ltd | Antenna for rf-id reader/writer device, and rf-id reader/writer device and rf-id system using the device |
-
2009
- 2009-08-28 JP JP2012526676A patent/JP2013503551A/en active Pending
- 2009-08-28 WO PCT/MY2009/000127 patent/WO2011025353A1/en active Application Filing
- 2009-08-28 KR KR1020127005132A patent/KR101569161B1/en active IP Right Grant
- 2009-08-28 SG SG2012003521A patent/SG177695A1/en unknown
- 2009-08-28 AU AU2009351695A patent/AU2009351695B2/en not_active Ceased
-
2010
- 2010-08-27 TW TW099128935A patent/TW201133352A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| AU2009351695B2 (en) | 2013-10-24 |
| KR101569161B1 (en) | 2015-11-13 |
| KR20120058529A (en) | 2012-06-07 |
| TW201133352A (en) | 2011-10-01 |
| WO2011025353A8 (en) | 2011-10-13 |
| WO2011025353A1 (en) | 2011-03-03 |
| JP2013503551A (en) | 2013-01-31 |
| SG177695A1 (en) | 2012-02-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGA | Letters patent sealed or granted (standard patent) | ||
| MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |