CN201191647Y - RFID electronic label antenna having dual T type slot radiation element - Google Patents
RFID electronic label antenna having dual T type slot radiation element Download PDFInfo
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- CN201191647Y CN201191647Y CNU2008200476713U CN200820047671U CN201191647Y CN 201191647 Y CN201191647 Y CN 201191647Y CN U2008200476713 U CNU2008200476713 U CN U2008200476713U CN 200820047671 U CN200820047671 U CN 200820047671U CN 201191647 Y CN201191647 Y CN 201191647Y
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- copper sheet
- medium substrate
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- electronic label
- copper
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Abstract
The utility model discloses a FRID electronic tag antenna of radiating elements with double T-shaped gaps, wherein a foam layer is arranged between an upper dielectric substrate and a lower dielectric substrate, wherein copper sheet floor is pasted on the upper surface of the lower dielectric substrate, two radiating copper sheets with double T-shaped gaps are pasted on the upper surface of the upper dielectric substrate, and a gap is arranged on each of the radiating copper sheets, and the two gaps are positioned under the T-shaped gaps, and the two radiating copper sheets are separately arranged on the upper surface of the upper dielectric substrate and are symmetric with each other, the two radiating copper sheets are respectively connected with the copper sheet floor through a copper sheet short-circuiting bar, and the gaps of the two radiating copper sheets are respectively connected to copper sheet matching network through microstrip lines, and an antenna input port is arranged on the copper sheet matching network. The utility model has the advantages that the bandwidth is big, and the antenna can be used in FRID systems with multiple areas, not only can be used on nonmetallic surfaces, but also can be conveniently used on metallic surfaces, the volume is small, the manufacture is easy, and the cost is low.
Description
Technical field
The utility model relates to a kind of frequency identification electronic label antenna, specifically relates to a kind of can be applicable in hyper band (UHF) scope, can conveniently be applied to the frequency identification electronic label antenna of metal surface.
Background technology
REID is contactless identification, is a kind ofly to carry out contactless bidirectional data communication by wireless radio frequency mode, target is discerned and obtained the automatic identification technology of relevant information.Radio-frequency recognition system mainly is made up of reader, middleware and electronic tag three parts.Electronic tag is made up of on-chip antenna and integrated chip, carries out exchanges data by electromagnetic wave and reader, has intelligent read and encrypted communication function.Antenna is a kind of device that front-end radiofrequency signal power is received or launches with the electromagnetic wave form, is the interface device in circuit and space, is used for realizing the conversion of guided wave and free space wave energy.In rfid system, electronic label antenna is born the effect of received energy, and whole rfid system is played a crucial role.
At present, the operating frequency of radio-frequency (RF) identification comprises low frequency, high frequency, hyperfrequency and microwave frequency band, especially being most widely used with high frequency and hyperfrequency.RFID tag can be divided into initiatively (active) label and passive (passive) label according to power supply the principle.Its energy that provides read write line signal post to need is provided the self-contained battery of active tag; Passive label then adopts the backscattering working method, promptly the electromagnetic wave that sends from read write line by electronic label antenna obtains energy activated chip, and the matching degree of regulating radio frequency identification label chip and electronic label antenna, give read write line with the feedback information that is stored in the label chip.Therefore, the impedance of frequency identification electronic label antenna must with the input impedance conjugate impedance match of label chip so that the electromagnetic energy that label chip can obtain radio-frequency identification reader/writer to greatest extent to be sent.In addition, the radio frequency of shf band is very responsive to metal, causes the passive label of present this operating frequency having operate as normal on the object of metal surface.Applying in radio frequency identification logistic industry the most widely mostly is the metal environment, so this shortcoming of metal sensitivity has limited its application at logistic industry greatly.With regard to present technology, can solve its application problem by the electronic tag surface being applied barrier coat, but this method difficulty of construction is big, the production cost height in the metal surface.It is one of key technology of being widely used of radio-frequency (RF) identification that exploitation is suitable for various chips, low cost, multiduty electronic label antenna.
The utility model content
The purpose of this utility model is to overcome the above-mentioned shortcoming that prior art exists, a kind of frequency identification electronic label antenna that has double-T shaped gap radiation unit is provided, it can be applied in hyperfrequency (UHF) the frequency range radio-frequency recognition system, and can be applicable to the metal surface, have that section is low, volume is little, simple in structure, easy processing, characteristics that cost is low.
The purpose of this utility model is achieved through the following technical solutions:
The frequency identification electronic label antenna that has double-T shaped gap radiation unit, it comprises medium substrate and following medium substrate, is provided with sponge layer between last medium substrate and the following medium substrate; The upper surface of following medium substrate posts the copper sheet floor; The upper surface of last medium substrate adheres to two radiation copper sheets that all have T groove part crack; Described two radiation copper sheets respectively have a breach, and this two breach lays respectively at two T groove part cracks belows, and two radiation copper sheets are arranged apart in the upper surface of last medium substrate and symmetrically; Two radiation copper sheets are connected to the copper sheet floor by a copper sheet short-circuit piece separately; The described indentation, there of two radiation copper sheets is connected to the copper sheet matching network by a microstrip line separately, and the copper sheet matching network is provided with antenna input port.
In the above-mentioned frequency identification electronic label antenna that has a double-T shaped gap radiation unit, described copper sheet matching network has " one " font slit of removing copper sheet, the label chip impedance phase coupling that gap size satisfies the impedance of electronic label antenna and links to each other.
In the above-mentioned frequency identification electronic label antenna that has a double-T shaped gap radiation unit, described breach is a rectangle.
In the above-mentioned frequency identification electronic label antenna that has a double-T shaped gap radiation unit, described two copper sheet short-circuit pieces (21,22) lay respectively at dual-side top, described copper sheet floor (31) and left-right symmetric.
Spacing width is adjustable between the described left-right symmetric radiating element.
Copper sheet short-circuit piece width and position that described symmetry is placed are adjustable.
The utlity model has following advantage and good effect:
(1) the utility model has been introduced the copper sheet matching network that has " one " font slit, by regulating copper sheet matching network gap size, be used to adjust the input impedance of electronic label antenna, the impedance that makes antenna well with the input impedance conjugate impedance match of electronic label chip, make antenna have bigger bandwidth.
(2) upper surface of medium substrate posts copper sheet under the utility model, make it become Reflector Panel, thereby make metal not only can not influence the effect of reading of label, can make the field stack of the electromagnetic field and the label antenna of metallic reflection on the contrary, reach the further effect that improves of the reading distance that makes label antenna, realize that electronic tag can directly apply to the function of metal surface.
(3) the utility model can be used in the radio-frequency recognition system of hyperfrequency (UHF) frequency range, can contain the radio-frequency recognition system of 902～928MHz of the radio-frequency recognition system of 866～869MHz in Europe and North America simultaneously; The utility model frequency identification electronic label antenna not only can be applied to free space, also can be applied to the metal surface, all reaches more than 6 meters at free space and metal surface reading distance.
(4) the utility model also has low section, little, simple in structure, the easy processing of volume, characteristics that cost is low.
Description of drawings
The overall structure schematic diagram of Fig. 1 frequency identification electronic label antenna of double-T shaped gap radiation unit for the utility model has.
Fig. 2 is a vertical view of going up medium substrate among Fig. 1.
Fig. 3 is the vertical view of following medium substrate among Fig. 1.
Fig. 4 is the left and right sides view of Fig. 1.
Specific embodiments
Below in conjunction with accompanying drawing the utility model is described in further detail, but execution mode of the present utility model is not limited thereto.
The overall structure schematic diagram of Fig. 1 frequency identification electronic label antenna of double-T shaped gap radiation unit for the utility model has.As shown in Figure 1, the frequency identification electronic label antenna that has a double-T shaped gap radiation unit comprises medium substrate 1, sponge layer 2 and following medium substrate 3.The left-right symmetric radiation copper sheet that has double-T shaped slit 15,16 radiating elements is attached to the upper surface of medium substrate 1; The back side of medium substrate 1 does not have copper sheet; The copper sheet floor plaster is at the upper surface of following medium substrate 3; Have the copper sheet radiating element of removing copper sheet T groove part crack and be connected to the copper sheet floor by symmetrical copper sheet short- circuit piece 21,22 respectively; Two radiation copper sheets of symmetrical copper sheet radiating element of medium substrate layer upper surface respectively have a breach, and this two breach is positioned at below, T groove part crack; The indentation, there of two radiation copper sheets is connected to copper sheet matching network 17 through left and right sides microstrip line 13,14 respectively; The copper sheet matching network directly connects radio-frequency (RF) identification chip by antenna input port 19.Be used to improve when label antenna and be positioned over the foamed material air layer 2 of metal surface performance between last medium substrate 1 and following medium substrate 3, be used to reduce when label antenna is positioned over the metal surface, the performance of label antenna is improved to the decay of antenna in the metal surface.
Fig. 2 is a vertical view of going up medium substrate 1 among Fig. 1.According to the resonance principle of plane dipole antenna, when antenna length equal the resonant frequency point wavelength 1/4 or 1/2 the time all can cause resonance.Radiating element cornerwise length in the left and right sides adds that the length of microstrip line and matching network equals 1/2 wavelength of 900MHz Frequency point, so this antenna resonance is in the 900MHz frequency range.Left-right symmetric radiation patch unit 11,12 is for having the copper sheet in T groove part crack, the working frequency range of the controlled amount system antenna of left and right sides radiating element 11,12; Microstrip line 13 connects left radiating element 11 and matching network 17, and microstrip line 14 connects right radiating element 12 and matching network 17; The working frequency range of the length controlled system antenna of microstrip line, the length of increase microstrip line, resonance frequency descends, on the contrary resonance frequency increases; The rectangle copper sheet that copper sheet matching network 17 is removed " one " font slit 18 of copper sheet by the centre is formed, principle according to two inductance Г type matching network equivalent schematic diagrams, the length and the width in " one " font slit 18 are big more, the input impedance of antenna is big more, otherwise, the input impedance of antenna is more little, by regulating the length and the width in " one " font slit 18, can adapt to the chip of different impedances; The antenna input port 19 of removing copper sheet is positioned at matching network 17, antenna input port 19 directly connects radio frequency chip, when transmitting, signal is from the antenna input port feed-in, through matching network 17 and left and right sides microstrip line 13,14 feed-in left and right sides radiating elements 11,12, thereby cause resonance, change current signal into electromagnetic wave signal.During received signal, left and right sides radiating element 11,12 changes electromagnetic wave signal into current signal, electric current transfers to copper sheet matching network 17 through left and right sides microstrip line 13,14, adjustment through copper sheet matching network 17, make the input impedance conjugate impedance match of antenna feed impedance with the radio frequency identification label chip that is connected at antenna input port 19 places, the information energy that finally makes label antenna and received is with farthest the feed input of radio frequency identification label chip of the form of electric current, to activate radio frequency identification label chip and to make it work.
Fig. 3 is the vertical view of following medium substrate 3 among Fig. 1.Following medium substrate upper surface posts the copper sheet floor, and lower surface does not have attached copper.
Fig. 4 is the left and right sides view of Fig. 1.As shown in Figure 4, the frequency identification electronic label antenna that can be used for the metal surface comprises medium substrate 1, sponge layer 2 and following medium substrate 3; Symmetry copper sheet radiating element 11,12 is connected to copper sheet floor 31 by symmetrical copper sheet short- circuit piece 21,22 respectively, the CURRENT DISTRIBUTION that the copper sheet short- circuit piece 21,22 that symmetry is placed is used on the equilibrium radiation chip unit, impedance and the resonance frequency that can regulate antenna.
The utility model can be used in the radio-frequency recognition system of hyperfrequency (UHF) frequency range, can contain simultaneously Europe 866～The radio-frequency recognition system of the radio-frequency recognition system of 869MHz and 902～928MHz of North America. The utility model can be reliable Conveniently be applied to the metal surface, also have low section, little, simple in structure, the easy processing of volume, characteristics that cost is low.
Claims (4)
1, the frequency identification electronic label antenna that has double-T shaped gap radiation unit is characterized in that comprising medium substrate (1) and following medium substrate (3), is provided with sponge layer (2) between last medium substrate (1) and the following medium substrate (3); The upper surface of following medium substrate (3) posts copper sheet floor (31); The upper surface of last medium substrate (1) adheres to two radiation copper sheets (11,12) that all have T groove part crack (15,16); Described two radiation copper sheets (11,12) respectively have a breach, and this two breach lays respectively at two T groove part cracks (15,16) belows, and two radiation copper sheets (11,12) are arranged apart in the upper surface of last medium substrate (1) and symmetrically; Two radiation copper sheets (11,12) are connected to copper sheet floor (31) by a copper sheet short-circuit piece (21,22) separately; The described indentation, there of two radiation copper sheets (11,12) is connected to copper sheet matching network (17) by a microstrip line (13,14) separately, and copper sheet matching network (17) is provided with antenna input port (19).
2, the frequency identification electronic label antenna that has double-T shaped gap radiation unit according to claim 1, it is characterized in that described copper sheet matching network (17) has " one " font slit (18) of removing copper sheet, gap size satisfies the impedance of electronic label antenna and the label chip impedance phase coupling that links to each other.
3, the frequency identification electronic label antenna that has double-T shaped gap radiation unit according to claim 1 is characterized in that described breach is a rectangle.
4, the frequency identification electronic label antenna that has double-T shaped gap radiation unit according to claim 1 is characterized in that described two copper sheet short-circuit pieces (21,22) lay respectively at top, the left and right sides, described copper sheet floor (31) and symmetrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200476713U CN201191647Y (en) | 2008-05-13 | 2008-05-13 | RFID electronic label antenna having dual T type slot radiation element |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200476713U CN201191647Y (en) | 2008-05-13 | 2008-05-13 | RFID electronic label antenna having dual T type slot radiation element |
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| Publication Number | Publication Date |
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| CN201191647Y true CN201191647Y (en) | 2009-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008200476713U Expired - Fee Related CN201191647Y (en) | 2008-05-13 | 2008-05-13 | RFID electronic label antenna having dual T type slot radiation element |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101901957A (en) * | 2010-06-30 | 2010-12-01 | 上海韩硕信息科技有限公司 | Micro radio frequency identification tag and micro strip patch antenna therein |
| CN101593866B (en) * | 2009-06-30 | 2013-07-10 | 华南理工大学 | Dielectric resonance UHF RFID label antenna provided with T-shaped matching network |
| CN103887603A (en) * | 2014-03-26 | 2014-06-25 | 广东泰阳通信设备有限公司 | Minimized monopole antenna |
| US9893429B2 (en) | 2013-03-11 | 2018-02-13 | Futurewei Technologies, Inc. | Wideband slot antenna for wireless communication devices |
| CN109273868A (en) * | 2018-09-29 | 2019-01-25 | 普联技术有限公司 | A kind of antenna and antenna equipment |
| CN111931893A (en) * | 2020-07-10 | 2020-11-13 | 菜鸟智能物流控股有限公司 | Radio frequency label |
| CN115101928A (en) * | 2022-06-29 | 2022-09-23 | 南京信息职业技术学院 | Small-size hyperfrequency tag antenna of two special-shaped winding ring loads |
-
2008
- 2008-05-13 CN CNU2008200476713U patent/CN201191647Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101593866B (en) * | 2009-06-30 | 2013-07-10 | 华南理工大学 | Dielectric resonance UHF RFID label antenna provided with T-shaped matching network |
| CN101901957A (en) * | 2010-06-30 | 2010-12-01 | 上海韩硕信息科技有限公司 | Micro radio frequency identification tag and micro strip patch antenna therein |
| US9893429B2 (en) | 2013-03-11 | 2018-02-13 | Futurewei Technologies, Inc. | Wideband slot antenna for wireless communication devices |
| CN103887603A (en) * | 2014-03-26 | 2014-06-25 | 广东泰阳通信设备有限公司 | Minimized monopole antenna |
| CN103887603B (en) * | 2014-03-26 | 2016-06-29 | 广州泽歌通信科技有限公司 | A kind of miniaturization monopole antenna |
| CN109273868A (en) * | 2018-09-29 | 2019-01-25 | 普联技术有限公司 | A kind of antenna and antenna equipment |
| CN111931893A (en) * | 2020-07-10 | 2020-11-13 | 菜鸟智能物流控股有限公司 | Radio frequency label |
| CN111931893B (en) * | 2020-07-10 | 2023-12-26 | 菜鸟智能物流控股有限公司 | Radio frequency tag |
| CN115101928A (en) * | 2022-06-29 | 2022-09-23 | 南京信息职业技术学院 | Small-size hyperfrequency tag antenna of two special-shaped winding ring loads |
| CN115101928B (en) * | 2022-06-29 | 2023-10-13 | 南京信息职业技术学院 | Double special-shaped coil ring loaded small-sized ultrahigh frequency tag antenna |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shenzhen Jin Baize electronics technology limited company Assignor: South China University of Technology Contract record no.: 2012440020245 Denomination of utility model: RFID electronic label antenna having dual T type slot radiation element Granted publication date: 20090204 License type: Exclusive License Record date: 20120822 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090204 Termination date: 20130513 |
|
| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: Shenzhen Jin Baize electronics technology limited company Assignor: South China University of Technology Contract record no.: 2012440020245 Date of cancellation: 20160106 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model |