CN104733846A - Small UHF meander-line dipole anti-metallic RFID label antenna - Google Patents
Small UHF meander-line dipole anti-metallic RFID label antenna Download PDFInfo
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- CN104733846A CN104733846A CN201510131798.8A CN201510131798A CN104733846A CN 104733846 A CN104733846 A CN 104733846A CN 201510131798 A CN201510131798 A CN 201510131798A CN 104733846 A CN104733846 A CN 104733846A
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- antenna
- rfid label
- medium substrate
- dipole
- label antenna
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Abstract
The invention relates to a label antenna, in particular to a small UHF meander-line dipole anti-metallic RFID label antenna, and belongs to the technical field of RFID label antennas. According to the technical scheme, the small UHF meander-line dipole anti-metallic RFID label antenna comprises a medium substrate. The bottom face of the medium substrate is provided with a metal floorboard, the upper surface of the medium substrate is provided with an IC antenna chip. The two sides of the IC antenna chip are symmetrically provided with folding radiation paster. The folding radiation paster is electrically connected with the metal floorboard. The mall UHF meander-line dipole anti-metallic RFID label antenna is compact in structure, small in size, capable of being used for objects required to be conformal, capable of improving radiation efficiency and lowering the resonant frequency, safe and reliable.
Description
Technical field
The present invention relates to a kind of label antenna, especially a kind of miniaturized UHF bends dipole anti-metal RFID label antenna, belongs to the technical field of RFID label antenna.
Background technology
At present, because ultra-high frequency band RFID label has that transfer of data is fast, cost is low, reads many advantages such as distance, be widely used in a lot of people's livelihood field, the huge economic worth for social creativity.Along with the continuous expansion of application demand, passive RFID label technique is also at continuous development and progress, and this makes the design and researchp as the antenna of rfid system critical component become very critical and urgent.
UHF rfid system is also different according to its working frequency range of difference of every country radio law.Such as European Union (EU) frequency range is 865.6-867.6MHz, and the U.S. (US) frequency range is 902-928MHz, and China's frequency range is 840-845MHz and 920-925MHz.Label is wanted can to read in this country and just must be worked within the band limits of regulation.
In some practical applications, ultra-high frequency RFID label may be attached at metal object surface, but there is appreciable impact in the near field of metal environment on antenna, and these impacts are by the antenna pattern of change label, input impedance, radiation efficiency and frequency response etc.So the use of ultra-high frequency RFID label on the metal objects such as such as container, steel framework, automobile and oil gas tank is a huge challenge.
The label sizes that common uhf band has broadband character is comparatively large, and mostly based on FR4 medium substrate, in use can not bend, and label cannot be used in and have on the object of general character requirement.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of miniaturized UHF to bend dipole anti-metal RFID label antenna, its compact conformation, volume is little, can be used for having on the object of conformal requirement, can increase radiation efficiency, reduce resonance frequency, safe and reliable.
According to technical scheme provided by the invention, described miniaturized UHF bends dipole anti-metal RFID label antenna, comprise medium substrate, metal floor is provided with in the bottom surface of medium substrate, the upper surface of medium substrate is provided with IC antenna chip, arrange symmetrical folding radiation patch in the both sides of described IC antenna chip, described folding radiation patch is electrically connected with metal floor.
Both sides outside described folding radiation patch are provided with coupling tape.Described folding radiation patch is electrically connected with metal floor by grounding probe.
The material of described medium substrate comprises Rogers material, and dielectric substrate thickness is 0.5mm.The end of described folding radiation patch arranges the large paster for reducing antenna capacitive reactance.
Advantage of the present invention: adopt gradual bending dipole form to make label miniaturization more be easy to processing and realize, simultaneously adds radiation efficiency not affecting in antenna impedance situation; Introduce the method loading large paster in antenna end, under identical antenna length, can resonance frequency be effectively reduced; Coupling tape is added, to make the impedance matching better realizing antenna in antenna both sides; Medium substrate adopts thickness to be the Rogers high-frequency microwave material of 0.5mm, achieve label and can be applicable to and have on object that general character requires, thus the miniaturization obtaining bandwidth ultra-high frequency band covering the whole world can be used for the anti-metal tag antenna with conformal requirement.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is parameter mark figure of the present invention.
Fig. 3 is stickogram of the present invention.
Fig. 4 is planar gain figure of the present invention.
Description of reference numerals: 1-folds radiation patch, 2-is coupled tape, 3-IC antenna chip, 4-grounding probe, 5-medium substrate and 6-metal floor.
Embodiment
Below in conjunction with concrete drawings and Examples, the invention will be further described.
As shown in Figure 1: in order to can for having the object of conformal requirement, radiation efficiency can be increased, reduce resonance frequency, the present invention includes medium substrate 5, metal floor 6 is provided with in the bottom surface of medium substrate 5, the upper surface of medium substrate 5 is provided with IC antenna chip 3, arranges symmetrical folding radiation patch 1 in the both sides of described IC antenna chip 3, described folding radiation patch 1 is electrically connected with metal floor 6.
Particularly, metal floor 6 is formed by the bottom surface covering metal thin layer at medium substrate 5, ground plane can be formed by metal floor 6, so that can ground connection be carried out by metal floor 6, symmetrical folding radiation patch 1 is obtained in the upper surface etching of medium substrate 5, the head end of folding radiation patch 1 is connected with the IC antenna chip 3 being positioned at medium substrate 5 center, folding radiation patch 1 adopts multiple progressive bending structure, be symmetrically distributed in the two ends of IC antenna chip 3, dipole plane can be formed between two folding radiation patch 1, the chip type that IC antenna chip 3 can adopt the art conventional, IC antenna chip 3 can carry out required coupling receiving and transmitting signal by folding radiation patch 1.
Both sides outside described folding radiation patch 1 are provided with coupling tape 2.Coupling tape 2 and folding radiation patch 1 synchronously etch at the upper surface of medium substrate 5 and obtain, coupling tape 2 is strip distribution at the upper surface of medium substrate 5, the length direction of coupling band 2 is consistent with the length direction of folding radiation patch 1, and the length of coupling band 2 is less than the distance between two folding radiation patch 1, impedance matching can be reached by coupling band 2, the induction reactance of antenna can be regulated simultaneously, widen operational frequency bandwidth.
Further, described folding radiation patch 1 is electrically connected with metal floor 6 by grounding probe 4.The head end of folding radiation patch 1 is electrically connected with the metal floor 6 be positioned on medium substrate 5 bottom surface by grounding probe 4, the end of described folding radiation patch 1 arranges the large paster for reducing antenna capacitive reactance, described large paster refers to can reduce the capacitive reactance of antenna by the tail end that area is larger by large paster.
As shown in Fig. 2 ~ Fig. 4, adopt Rogers to be described further for medium substrate 5, wherein medium substrate 5 adopts the material of Rogers 5880, and relative dielectric constant is 2.2, and loss tangent is 0.0009.The length of medium substrate 5 is 50mm, and width is 40mm, and thickness is 0.5mm.In the specific implementation, mainly for the Higgs3 chip (IC antenna chip 3) of meaning connection science and technology (Alien Technology), under 915MHz, chip impedance value is Z
cthe power susceptibility of=16.6-j155 Ω and-18dBm.
The radius r of grounding probe 4 is 0.35mm, and grounding probe 4 is 16.5mm apart from the distance lp of antenna axis, with the resonance frequency meeting antenna for antenna feed impedance under 890MHz mates optimum with chip impedance.
Adopt gradual dipole antenna bending structure, bending number of times is 3 times, and this structure has no impact substantially for the impedance of antenna, but can increase radiation efficiency.In order to further miniaturization, load large paster structure at the end of antenna, add the electric capacity of antenna, reduce the capacitive reactance of antenna, under identical antenna length, can resonance frequency be effectively reduced.Antenna loading both sides coupling tape 2, thus the antenna that obtains and IC antenna chip 3 are better mated.The parameter of concrete antenna is as follows: l=50mm, w=40mm, d=1mm, l
a=3mm, l
b=1mm, l
c=5mm, p=4mm, w
a=20mm, w
b=25mm, w
c=30mm, l
e=32mm, d
p=1mm.
Label antenna reflection coefficient analogous diagram, as shown in Figure 3.Be 890MHz in frequency, antenna impedance and chip impedance conjugate impedance match.The frequency band that antenna is less than-10dB is 835MHz-960MHz, and centre frequency is 890MHz, and notch depth is-30dB, and bandwidth is 124MHz.The planar gain analogous diagram of label antenna, as shown in Figure 4.Antenna is in Φ=90
0the gain of plane, the maximum gain of antenna is 1.65dB.
The present invention adopts gradual bending dipole form to make label miniaturization more be easy to processing and realizes, and simultaneously adds radiation efficiency not affecting in antenna impedance situation; Introduce the method loading large paster in antenna end, under identical antenna length, can resonance frequency be effectively reduced; Coupling tape 2 is added, to make the impedance matching better realizing antenna in antenna both sides; Medium substrate 5 adopts thickness to be the Rogers high-frequency microwave material of 0.5mm, achieve label and can be applicable to and have on object that general character requires, thus the miniaturization obtaining bandwidth ultra-high frequency band covering the whole world can be used for the anti-metal tag antenna with conformal requirement.
Claims (5)
1. a miniaturized UHF bends dipole anti-metal RFID label antenna, it is characterized in that: comprise medium substrate (5), metal floor (6) is provided with in the bottom surface of medium substrate (5), the upper surface of medium substrate (5) is provided with IC antenna chip (3), arrange symmetrical folding radiation patch (1) in the both sides of described IC antenna chip (3), described folding radiation patch (1) is electrically connected with metal floor (6).
2. miniaturized UHF according to claim 1 bends dipole anti-metal RFID label antenna, it is characterized in that: be provided with coupling tape (2) in described folding radiation patch (1) both sides outward.
3. miniaturized UHF according to claim 1 bends dipole anti-metal RFID label antenna, it is characterized in that: described folding radiation patch (1) is electrically connected with metal floor (6) by grounding probe (4).
4. miniaturized UHF according to claim 1 bends dipole anti-metal RFID label antenna, and it is characterized in that: the material of described medium substrate (5) comprises Rogers material, medium substrate (5) thickness is 0.5mm.
5. miniaturized UHF according to claim 1 bends dipole anti-metal RFID label antenna, it is characterized in that: the end of described folding radiation patch (1) arranges the large paster for reducing antenna capacitive reactance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510131798.8A CN104733846A (en) | 2015-03-24 | 2015-03-24 | Small UHF meander-line dipole anti-metallic RFID label antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510131798.8A CN104733846A (en) | 2015-03-24 | 2015-03-24 | Small UHF meander-line dipole anti-metallic RFID label antenna |
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| Publication Number | Publication Date |
|---|---|
| CN104733846A true CN104733846A (en) | 2015-06-24 |
Family
ID=53457484
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510131798.8A Pending CN104733846A (en) | 2015-03-24 | 2015-03-24 | Small UHF meander-line dipole anti-metallic RFID label antenna |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106654524A (en) * | 2016-12-29 | 2017-05-10 | 华侨大学 | Double-layer structured broadband UHF RFID anti-metal tag antenna |
| CN107799871A (en) * | 2016-09-02 | 2018-03-13 | 半导体元件工业有限责任公司 | Radio frequency identification (RFID) labels device |
| CN108666748A (en) * | 2017-03-29 | 2018-10-16 | 国基电子（上海）有限公司 | Antenna assembly |
| CN109159506A (en) * | 2018-07-27 | 2019-01-08 | 中国人民解放军陆军装甲兵学院 | A kind of flexibility UHF RFID anti-metal tag |
| CN109962332A (en) * | 2017-12-26 | 2019-07-02 | 三星电机株式会社 | Anneta module and antenna assembly |
| CN111799554A (en) * | 2020-07-08 | 2020-10-20 | 中国人民解放军陆军装甲兵学院 | Flexible anti-metal RFID (radio frequency identification) tag antenna and impedance analysis method |
| CN112151935A (en) * | 2019-06-27 | 2020-12-29 | 亘冠智能技术（杭州）有限公司 | Liquid insensitive ultrahigh frequency RFID flexible tag antenna |
| CN113991283A (en) * | 2021-10-26 | 2022-01-28 | 福州大学 | Miniaturized anti-metal ultrahigh frequency RFID (radio frequency identification) tag antenna with folding structure |
| CN115064868A (en) * | 2022-07-06 | 2022-09-16 | 杭州电子科技大学 | Dual-polarized crossed dipole transparent antenna |
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| KR20080105493A (en) * | 2007-05-31 | 2008-12-04 | 대구대학교 산학협력단 | Small size uhf rfid tag |
| CN103474747A (en) * | 2013-08-29 | 2013-12-25 | 成都九洲电子信息系统股份有限公司 | RFID (Radio Frequency Identification) anti-metal tag antenna |
| CN103531913A (en) * | 2013-10-14 | 2014-01-22 | 电子科技大学 | Hexagonal substrate integrated waveguide slot antenna |
| CN103594795A (en) * | 2013-11-21 | 2014-02-19 | 天津中兴智联科技有限公司 | RFID label antenna |
| CN104241829A (en) * | 2014-09-24 | 2014-12-24 | 上海大学 | RFID (radiofrequency identification) tag applied to intensive distribution scenarios and mutual impedance design method thereof |
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2015
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Patent Citations (5)
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| KR20080105493A (en) * | 2007-05-31 | 2008-12-04 | 대구대학교 산학협력단 | Small size uhf rfid tag |
| CN103474747A (en) * | 2013-08-29 | 2013-12-25 | 成都九洲电子信息系统股份有限公司 | RFID (Radio Frequency Identification) anti-metal tag antenna |
| CN103531913A (en) * | 2013-10-14 | 2014-01-22 | 电子科技大学 | Hexagonal substrate integrated waveguide slot antenna |
| CN103594795A (en) * | 2013-11-21 | 2014-02-19 | 天津中兴智联科技有限公司 | RFID label antenna |
| CN104241829A (en) * | 2014-09-24 | 2014-12-24 | 上海大学 | RFID (radiofrequency identification) tag applied to intensive distribution scenarios and mutual impedance design method thereof |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107799871A (en) * | 2016-09-02 | 2018-03-13 | 半导体元件工业有限责任公司 | Radio frequency identification (RFID) labels device |
| CN106654524A (en) * | 2016-12-29 | 2017-05-10 | 华侨大学 | Double-layer structured broadband UHF RFID anti-metal tag antenna |
| CN108666748A (en) * | 2017-03-29 | 2018-10-16 | 国基电子（上海）有限公司 | Antenna assembly |
| US11509039B2 (en) | 2017-12-26 | 2022-11-22 | Samsung Electro-Mechanics Co., Ltd. | Antenna module and antenna apparatus |
| CN109962332A (en) * | 2017-12-26 | 2019-07-02 | 三星电机株式会社 | Anneta module and antenna assembly |
| US10790573B2 (en) | 2017-12-26 | 2020-09-29 | Samsung Electro-Mechanics Co., Ltd. | Antenna module and antenna apparatus |
| CN109159506A (en) * | 2018-07-27 | 2019-01-08 | 中国人民解放军陆军装甲兵学院 | A kind of flexibility UHF RFID anti-metal tag |
| CN109159506B (en) * | 2018-07-27 | 2020-11-24 | 中国人民解放军陆军装甲兵学院 | Flexible UHF RFID anti-metal label |
| CN112151935A (en) * | 2019-06-27 | 2020-12-29 | 亘冠智能技术（杭州）有限公司 | Liquid insensitive ultrahigh frequency RFID flexible tag antenna |
| CN111799554A (en) * | 2020-07-08 | 2020-10-20 | 中国人民解放军陆军装甲兵学院 | Flexible anti-metal RFID (radio frequency identification) tag antenna and impedance analysis method |
| CN113991283A (en) * | 2021-10-26 | 2022-01-28 | 福州大学 | Miniaturized anti-metal ultrahigh frequency RFID (radio frequency identification) tag antenna with folding structure |
| CN115064868A (en) * | 2022-07-06 | 2022-09-16 | 杭州电子科技大学 | Dual-polarized crossed dipole transparent antenna |
| CN115064868B (en) * | 2022-07-06 | 2024-04-16 | 杭州电子科技大学 | Dual-polarized cross dipole transparent antenna |
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Application publication date: 20150624 |
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