CN101777693A - Ultrahigh frequency radio frequency identification anti-metal tag antenna with plane structure - Google Patents
Ultrahigh frequency radio frequency identification anti-metal tag antenna with plane structure Download PDFInfo
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- CN101777693A CN101777693A CN201010122898A CN201010122898A CN101777693A CN 101777693 A CN101777693 A CN 101777693A CN 201010122898 A CN201010122898 A CN 201010122898A CN 201010122898 A CN201010122898 A CN 201010122898A CN 101777693 A CN101777693 A CN 101777693A
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Abstract
The invention discloses an ultrahigh frequency radio frequency identification anti-metal tag antenna with a plane structure, which comprises a metal ground, a metal radiating surface, a substrate, an embedded groove, a first feeder line, a second feeder line and a radio frequency identification chip. The substrate is rectangular; the metal radiating surface, the embedded groove, the first feeder line, the second feeder line and the radio frequency identification chip are positioned on the upper surface of the substrate; the metal ground is positioned on the lower surface of the substrate; the embedded groove is embedded on one side of the metal radiating surface; one end of the embedded groove of the metal radiating surface is connected with one end of the first feeder line; the radio frequency identification chip is arranged between the other end of the first feeder line and one end of the second feeder line; and the other end of the second feeder line is provided with an open circuit. The ultrahigh frequency radio frequency identification anti-metal tag antenna manufactured by the invention has the plane structure; and the manufacturing cost of the tag antenna can be effectively reduced so as to contribute to mass production.
Description
Technical field
The present invention relates to the REID field, relate in particular to a kind of ultrahigh frequency radio frequency identification anti-metal tag antenna with plane structure.
Background technology
Radio-frequency (RF) identification (Radio frequency identification is called for short RFID) is a kind of automatic identification technology that utilizes the radio frequency reading tag.Radio-frequency recognition system generally is made up of reader (Reader) and label (Tag), and reader is by the information on the radio frequency reading tag.Compare with conventional barcode, it has advantages such as the distance of reading, fast, the non-visual recognition of reading speed, support fast reading and writing; REID combines with technology such as the Internet, cordless communication networks, can realize the tracking and the information sharing of article in the global range, have wide application space in various fields such as logistics supply chain, the production automation, public information service, traffic administration and Military Application.Radio-frequency recognition system operates mainly in frequency ranges such as low frequency, high frequency, hyperfrequency and microwave.Low frequency and high-frequency radio frequency recognition system mainly utilize inductance coupling high to finish recognition function, read close together.Hyperfrequency and microwave frequency band radio-frequency recognition system come reading of data by electromagnetic wave propagation, have the distance that reads far away.Wherein, hyperfrequency obtains extensive use owing to reading low being expected to of distance, cost in logistics and field of traffic.REID in general promptly refers to the super high frequency radio frequency recognition technology.
In quite a few super high frequency radio frequency identification is used, label need be pasted on metal object surface, for example: automobile, steel cylinder, container or the like.Because common label can't be applied to the metal surface, need to adopt the label of particular design, be called anti-metal tag or metal label.General anti-metal tag adopts micro-strip paster antenna or planar inverted-F antenna as label antenna, can be with the ground level of metal surface as antenna.These antenna generally all needs to use short circuit wall or via hole, thereby makes the cost of anti-metal tag antenna increase, and is unfavorable for large-scale production.For super high frequency radio frequency identification label, cost is to influence one of its important factor of applying.Therefore, no matter be to adopt existing etch process, or developing typography, the antenna structure of design plane structure more helps its large-scale production, reduces the forming label cost.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of ultrahigh frequency radio frequency identification anti-metal tag antenna with plane structure is provided.
The objective of the invention is to be achieved through the following technical solutions: ultrahigh frequency radio frequency identification anti-metal tag antenna with plane structure of the present invention, comprise metal ground, the metal radiating surface, substrate, embedded groove, first feeder line, second feeder line, radio-frequency (RF) identification chip, substrate is a rectangle, the metal radiating surface, embedded groove, first feeder line, second feeder line, radio-frequency (RF) identification chip is positioned at upper surface of base plate, metal ground is positioned at base lower surface, the embedded groove of the embedded formation of metal radiating surface one side, embedded groove one end of metal radiating surface links to each other with an end of first feeder line, be provided with radio-frequency (RF) identification chip between the other end of first feeder line and second feeder line, one end, second feeder line other end open circuit.
Further, described metal radiating surface, embedded groove, first feeder line, second feeder line, radio-frequency (RF) identification chip are positioned at upper surface of base plate, and metal ground is positioned at base lower surface, and substrate does not have any short circuit wall or via hole, has planar structure.Described second feeder line, one end links to each other with radio-frequency (RF) identification chip, and other end open circuit constitutes open stub.The length range of described second feeder line is 0～0.5 λ, and λ is the effective wavelength of operating frequency of antenna.
The invention has the beneficial effects as follows: ultrahigh frequency radio frequency identification anti-metal tag antenna with plane structure of the present invention has planar structure, can effectively reduce the processing and fabricating cost of label antenna, is convenient to large-scale production.
Description of drawings
Fig. 1 is the ultrahigh frequency radio frequency identification anti-metal tag antenna with plane structure structural representation;
Fig. 2 is the ultrahigh frequency radio frequency identification anti-metal tag antenna with plane structure vertical view;
Fig. 3 is the ultrahigh frequency radio frequency identification anti-metal tag antenna with plane structure resolution chart;
Fig. 4 is the impedance plot of ultrahigh frequency radio frequency identification anti-metal tag antenna with plane structure example;
Fig. 5 is the reflection parameters curve chart of ultrahigh frequency radio frequency identification anti-metal tag antenna with plane structure example;
Among the figure: 1, metal ground, 2, the metal radiating surface, 3, substrate, 4, embedded groove, 5, first feeder line, 6, second feeder line, 7, radio-frequency (RF) identification chip.
Embodiment
Super high frequency radio frequency identification label is a passive label, generally is made up of label antenna and label chip.Label antenna and label chip all are complex impedance.Label obtains energy and inquiry instruction from the request signal of reader antenna emission.When label obtained enough energy, label chip was activated.After label chip was activated, corresponding actions was carried out in its inquiry instruction according to reader, and launches data by backscattered modulation.To super high frequency radio frequency identification label, should tag design antenna and label chip impedance matching, thus realize the ceiling capacity transmission.
The present invention realizes the design of ultrahigh frequency radio frequency identification anti-metal tag antenna with plane structure by adopting the open stub feed.Below be embodiment and in conjunction with the accompanying drawings the present invention being described in detail with ultrahigh frequency radio frequency identification anti-metal tag antenna with plane structure based on the RI_UHF_00001_01 of TI company model super high frequency radio frequency identification label chip.
As Fig. 1,2, shown in 3, ultrahigh frequency radio frequency identification anti-metal tag antenna with plane structure of the present invention comprises: metal ground 1, metal radiating surface 2, substrate 3, embedded groove 4, first feeder line 5, second feeder line 6, radio-frequency (RF) identification chip 7, substrate 3 is a rectangle, metal radiating surface 1, embedded groove 4, first feeder line 5, second feeder line 6, radio-frequency (RF) identification chip 7 is positioned at substrate 3 upper surfaces, metal ground 1 is positioned at substrate 3 lower surfaces, the embedded groove 4 of the embedded formation of metal radiating surface 2 one sides, embedded groove 4 one ends of metal radiating surface 2 link to each other with an end of first feeder line 5, be provided with radio-frequency (RF) identification chip 7, the second feeder lines 6 other ends open circuit between the other end of first feeder line 5 and second feeder line, 6 one ends.Described metal radiating surface 1, embedded groove 4, first feeder line 5, second feeder line 6, radio-frequency (RF) identification chip 7 are positioned at substrate 3 upper surfaces, and metal ground 1 is positioned at substrate 3 lower surfaces, and substrate 3 no any short circuit wall or via holes have planar structure.Described second feeder line, 6 one ends link to each other with radio-frequency (RF) identification chip 7, and other end open circuit constitutes open stub.The length range of described second feeder line 6 is 0～0.5 λ, and λ is the effective wavelength of operating frequency of antenna.
For super high frequency radio frequency identification label, its radio-frequency (RF) identification chip 7 generally is a complex impedance.In order to realize the ceiling capacity transmission of antenna and chip, then need the input impedance and the chip impedance conjugate impedance match of antenna, this just requires the real part of antenna feed impedance and imaginary part all to have the ability of regulating flexibly.For label antenna of the present invention, it belongs to micro-strip paster antenna, the one section open stub of having connected, i.e. second feeder line 6.Second feeder line 6 is an open stub, by radio circuit as can be known, the length of 0～0.5 λ range regulation open stub can so that its reactance-∞～+ change in the ∞ scope.Therefore, can realize the adjusting of any reactance by the length of regulating second feeder line 6.And the resistance of antenna (in the working band scope) can be by the length adjustment of label metal radiating surface 2.Therefore, can realize the flexible of label antenna impedance, realize the impedance conjugate impedance match of label antenna and chip by this method.
Radio-frequency (RF) identification chip 7 adopts the RI_UHF_00001_01 model ultra-high frequency RFID label chip of TI (Texas Instruments) company, and the impedance of 915M frequency is 9.9-j60.3 Ω.Substrate 3 adopts common FR4 printed board, relative dielectric constant is 4.4, and loss angle tangent is 0.02, and thickness is 3mm, the length 74.5mm of metal radiating surface 2, metal radiating surface 2 width are 20mm, and the embedded groove insert depth of metal radiating surface 2 is 14mm, and width is 8mm, the length of first feeder line is 0.2mm, width is 3mm, and the length of second feed is 46mm, and width is 3mm.By electromagnetic-field simulation, the impedance curve of antenna, reflection coefficient curve are respectively as Fig. 4 and Fig. 5.By Fig. 4 and Fig. 5 as can be known, the input impedance of antenna can realize conjugate impedance match with the impedance of radio-frequency (RF) identification chip preferably at the frequency band range 920MHz～925MHz of Chinese super high frequency radio frequency identification.
Such scheme is a kind of embodiment of the present invention, multiple different application scheme can be arranged under feature according to the invention, but these application schemes needs only feature according to the invention, all should belong to the scope of the present invention.
Claims (4)
1. ultrahigh frequency radio frequency identification anti-metal tag antenna with plane structure, it is characterized in that, comprise metal ground (1), metal radiating surface (2), substrate (3), embedded groove (4), first feeder line (5), second feeder line (6), radio-frequency (RF) identification chip (7).Substrate (3) is a rectangle, metal radiating surface (1), embedded groove (4), first feeder line (5), second feeder line (6), radio-frequency (RF) identification chip (7) are positioned at substrate (3) upper surface, metal ground (1) is positioned at substrate (3) lower surface, the metal radiating surface embedded groove of the embedded formation of (2) one sides (4).Embedded groove (4) one ends of metal radiating surface (2) link to each other with an end of first feeder line (5), are provided with radio-frequency (RF) identification chip (7) between the other end of first feeder line (5) and second feeder line (6) one ends, second feeder line (6) other end open circuit.
2. according to the described ultrahigh frequency radio frequency identification anti-metal tag antenna with plane structure of claim 1, it is characterized in that, described metal radiating surface (1), embedded groove (4), first feeder line (5), second feeder line (6), radio-frequency (RF) identification chip (7) are positioned at substrate (3) upper surface, metal ground (1) is positioned at substrate (3) lower surface, no any short circuit wall of substrate (3) or via hole have planar structure.
3. according to the described ultrahigh frequency radio frequency identification anti-metal tag antenna with plane structure of claim 1, it is characterized in that described second feeder line (6) one ends link to each other with radio-frequency (RF) identification chip (7), other end open circuit constitutes open stub.
4. according to the described ultrahigh frequency radio frequency identification anti-metal tag antenna with plane structure of claim 1, it is characterized in that the length range of described second feeder line (6) is 0～0.5 λ, λ is the effective wavelength of operating frequency of antenna.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010122898A CN101777693A (en) | 2010-03-12 | 2010-03-12 | Ultrahigh frequency radio frequency identification anti-metal tag antenna with plane structure |
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| CN201010122898A CN101777693A (en) | 2010-03-12 | 2010-03-12 | Ultrahigh frequency radio frequency identification anti-metal tag antenna with plane structure |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012013097A1 (en) * | 2010-07-30 | 2012-02-02 | Liu Zhijia | Embedded anti-metal radio frequency identification label |
| CN102544725A (en) * | 2012-03-28 | 2012-07-04 | 浙江大学 | Metal embedded-type ultrahigh frequency radio frequency identification antenna |
| CN104718711A (en) * | 2012-06-28 | 2015-06-17 | 芬兰国家技术研究中心 | A near-field uhf identification system and a method for identifying an object or the kind of an object that is or contains electrically conductive material using near-field identification |
| CN105305040A (en) * | 2015-09-25 | 2016-02-03 | 西安电子科技大学 | Antenna used for anti-metal tag and antenna signal transmitting and receiving method |
| CN103886363B (en) * | 2014-03-12 | 2016-09-14 | 上海安威士科技股份有限公司 | Double resonance high bandwidth RFIDnt ultra-high frequency anti-metal tag and implementation method |
| CN105956650A (en) * | 2016-04-19 | 2016-09-21 | 中南大学 | RFID label antenna with open-circuit line feeding structure |
| CN107946759A (en) * | 2017-11-15 | 2018-04-20 | 北京工业大学 | A kind of array strain transducer based on microstrip antenna formula RFID tag |
| CN111355033A (en) * | 2018-12-20 | 2020-06-30 | 夏敬懿 | Anti-interference structure and locking device for installing radio frequency antenna |
| CN112038750A (en) * | 2020-09-04 | 2020-12-04 | 合肥工业大学 | Anti-metal tag antenna applied to UHF frequency band |
-
2010
- 2010-03-12 CN CN201010122898A patent/CN101777693A/en active Pending
Non-Patent Citations (2)
| Title |
|---|
| JAEHOON CHOI等: "《Antenna Technology：Small Antenna and Novel Metamaterials,2008.IWAT 2008.International Workshop on》", 6 March 2008 * |
| L.MO，H。ZHANG AND H.ZHOU: "Broadband UHF RFID tag antenna with a pair of U slots mountable on metallic objects", 《ELECTRONICS LETTERS》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012013097A1 (en) * | 2010-07-30 | 2012-02-02 | Liu Zhijia | Embedded anti-metal radio frequency identification label |
| CN102346867A (en) * | 2010-07-30 | 2012-02-08 | 刘智佳 | Embedded anti-metallic radio frequency identification label |
| CN102346867B (en) * | 2010-07-30 | 2015-08-05 | 刘智佳 | Embedded anti-metallic radio frequency identification label |
| CN102544725A (en) * | 2012-03-28 | 2012-07-04 | 浙江大学 | Metal embedded-type ultrahigh frequency radio frequency identification antenna |
| CN104718711A (en) * | 2012-06-28 | 2015-06-17 | 芬兰国家技术研究中心 | A near-field uhf identification system and a method for identifying an object or the kind of an object that is or contains electrically conductive material using near-field identification |
| CN103886363B (en) * | 2014-03-12 | 2016-09-14 | 上海安威士科技股份有限公司 | Double resonance high bandwidth RFIDnt ultra-high frequency anti-metal tag and implementation method |
| CN105305040A (en) * | 2015-09-25 | 2016-02-03 | 西安电子科技大学 | Antenna used for anti-metal tag and antenna signal transmitting and receiving method |
| CN105956650A (en) * | 2016-04-19 | 2016-09-21 | 中南大学 | RFID label antenna with open-circuit line feeding structure |
| CN107946759A (en) * | 2017-11-15 | 2018-04-20 | 北京工业大学 | A kind of array strain transducer based on microstrip antenna formula RFID tag |
| CN111355033A (en) * | 2018-12-20 | 2020-06-30 | 夏敬懿 | Anti-interference structure and locking device for installing radio frequency antenna |
| CN112038750A (en) * | 2020-09-04 | 2020-12-04 | 合肥工业大学 | Anti-metal tag antenna applied to UHF frequency band |
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Application publication date: 20100714 |