CN104638356A - Inductive coupling type equally-spaced bending dipole RFID (Radio Frequency Identification) tag antenna - Google Patents
Inductive coupling type equally-spaced bending dipole RFID (Radio Frequency Identification) tag antenna Download PDFInfo
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- CN104638356A CN104638356A CN201510047699.1A CN201510047699A CN104638356A CN 104638356 A CN104638356 A CN 104638356A CN 201510047699 A CN201510047699 A CN 201510047699A CN 104638356 A CN104638356 A CN 104638356A
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- 230000008878 coupling Effects 0.000 title claims abstract description 17
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- 230000001939 inductive effect Effects 0.000 title abstract 3
- 239000000758 substrate Substances 0.000 claims abstract description 18
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- 238000010586 diagram Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 238000005457 optimization Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
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Abstract
The invention discloses an inductive coupling type equally-spaced bending dipole RFID (Radio Frequency Identification) tag antenna, which comprises a substrate, a bending dipole radiator and a feed ring, wherein the bending dipole radiator and the feed ring are mounted on the substrate; the bending dipole radiator is U-shaped, two sides of the U shape are of a bending shape, and the feed ring is positioned between the two sides of the U shape inside the U-shaped bending dipole radiator. The inductive coupling type equally-spaced bending dipole RFID tag antenna has the beneficial effects that the characteristic impedance is flexibly adjustable, the impedance matching of bending dipoles is easy, and the cost is low.
Description
Technical field
The invention belongs to short-wave communication tedhnology field, relate to a kind of inductance coupling high type and equidistantly bend Dipole RFID Tag Antenna.
Background technology
Dipole antenna have structure simple, easily manufactured, there is isotropic feature, be thus widely used.But in the design of UHF RFID label antenna, because simple half-wave dipole antenna size is very large, be not suitable for the application of RFID label tag, also there is a following difficult problem with application in the design of UHF RFID label antenna: (1) resistance matching problem: obtain decipherment distance far away, require antenna and chip matched well, RFID chip generally has the impedance operator of small resistor, large capacitive reactance, brings very large problem to antenna with mating of chip; (2) Cost Problems: want large-scale application RFID label tag, the cost of label must lower, and this requires that label design must be simple as far as possible, and preferably can be at grade; (3) bandwidth problem: the UHF standard of China is 920-925MHz, therefore the bandwidth of General Requirements antenna preferably can all cover this frequency range.For these problems, the present invention devises a kind of novel inductor coupled mode bending Dipole RFID Tag Antenna, and impedance matching is simple, and cost of manufacture is low, and size is little, and structure is simple, and has wider impedance bandwidth, can solve the problem easily.
Summary of the invention
The object of the present invention is to provide a kind of inductance coupling high type equidistantly to bend Dipole RFID Tag Antenna, solve current RFID label antenna cost of manufacture high, antenna mates the problem of difficulty with chip.
The technical solution adopted in the present invention comprises substrate, bending dipole radiators and electric feedback ring; Bending dipole radiators and electric feedback ring are arranged on substrate, and bending dipole radiators takes the shape of the letter U, and U-shaped both sides are bending shape, and electric feedback ring is between the U-shaped both sides of U-shaped inside.
Further, in the U-shaped both sides of described bending dipole radiators, every two parts are up and down even-times bending, and top and the bottom structure axisymmetricly.
Further, described bending part is right angle.
Further, described substrate 1 adopt relative dielectric constant be 4.4 FR4; Described substrate 1 is rectangular configuration, and thickness is 0.5mm-1.6mm.
Further, described bending dipole radiators 2 reserves 1mm blank with substrate 1 edge.
Further, described bending dipole radiators 2 kink height scope is 9mm-11mm, and bending width is consistent and scope is 2mm-5mm, and live width scope is 1mm-5mm, electric feedback ring 3 mid point is 10mm-15mm to the distance range of nearest bending place, and antenna bent over arms spacing range is 4mm-9mm.
Further, the described rectangular structure of electric feedback ring 3, distance range apart from the nearest bending place of bending dipole radiators 2 is 1mm-5mm, input impedance imaginary part can be adjusted by changing its size, live width scope is 0.8mm-3mm, distributing point width range is 0.6mm-2mm, and the peripheral extent of electric feedback ring is 60mm-66mm.
The invention has the beneficial effects as follows that characteristic impedance is adjustable flexibly, realize the impedance matching of bending dipole easy, and cost is low.
Accompanying drawing explanation
Fig. 1 be inductance coupling high type equidistantly bend Dipole RFID Tag Antenna bending number be 2 structural representations;
Fig. 2 be inductance coupling high type equidistantly bend Dipole RFID Tag Antenna bending number be 4 structural representations;
Fig. 3 is the return loss plot of antenna bending number when being 2 after Optimal Parameters;
Fig. 4 is the return loss plot of antenna bending number when being 4 after Optimal Parameters;
Fig. 5 is the E face of antenna bending number when being 2 after Optimal Parameters, H face directional diagram;
Fig. 6 is the E face of antenna bending number when being 4 after Optimal Parameters, H face directional diagram.
In figure, 1. substrate, 2. bends dipole radiators, 3. electric feedback ring.
Embodiment
Below in conjunction with embodiment, the present invention is described in detail.
The present invention includes substrate 1, bending dipole radiators 2 and electric feedback ring 3.Bending dipole radiators 2 and electric feedback ring 3 are installed on substrate 1.Bending dipole radiators 2 is U-shaped, and U-shaped both sides are bending shape, and electric feedback ring 3 is between the U-shaped both sides of U-shaped inside.In the U-shaped both sides of bending dipole radiators 2, every two parts are up and down even-times bending, and top and the bottom structure axisymmetricly.Bending part is right angle.Substrate 1 adopt relative dielectric constant be 4.4 FR4, described substrate 1 is rectangular configuration, and thickness is 0.5mm-1.6mm.Bending dipole radiators 2 reserves 1mm blank with substrate 1 edge.Bending dipole radiators 2 kink height scope 9mm-11mm, bending width is consistent and scope is 2mm-5mm, and live width scope is 1mm-5mm, and electric feedback ring 3 mid point is 10mm-15mm to the distance range of nearest bending place, and antenna bent over arms spacing range is 4mm-9mm.The rectangular structure of electric feedback ring 3, distance range apart from the nearest bending place of bending dipole radiators 2 is 1mm-5mm, and can adjust input impedance imaginary part by changing its size, live width scope is 0.8mm-3mm, distributing point width range is 0.6mm-2mm, and the peripheral extent of electric feedback ring is 60mm-66mm.
It is on the basis of tradition bending dipole radiators that the present invention bends dipole radiators 2, and secondary bending is carried out in antenna width direction and adopts axially symmetric structure, the parameter combinations changing this radiant body realizes the adjustment of resonance frequency.Regulate the gap of described electric feedback ring and described bending dipole radiators in the design process, suitable input impedance real part can be obtained, finally reach the effect with label chip impedance conjugate impedance match.
The present invention be advantageous in that characteristic impedance is adjustable flexibly, realize the impedance matching of bending dipole easy; There is wider impedance bandwidth, cover China 920-925MHz ultra-high frequency band; Antenna width carries out secondary bending and reduces Aspect Ratio, effectively reduce the size of antenna; Adopt inductance feed, structure is simple, more can adapt to the application trend of label miniaturization.
The present invention will be described to enumerate specific embodiment below:
Embodiment 1: when bending number of times is 2, adopt the Higgs-3 chip of Alien company, its impedance changes with the change of frequency, and when 920MHz, its testing impedance value is about 27-j200 Ω, designing antenna under this frequency.
Antenna structure view is as shown in Figure 1, as shown in table 1 by optimizing its parameter rear, unit: mm.
Table 1
| L 1 | L 2 | L 3 | s | RL | RW | d | W 1 | W 2 | d 1 | h |
| 13.2 | 10 | 4 | 8 | 24 | 8 | 4 | 1 | 1 | 1 | 0.8 |
Final optimization antenna size is 49.2mm × 30mm × 0.8mm, the impedance Z=23.12+j198.59 Ω of antenna, and can realize the impedance conjugate impedance match of antenna impedance and chip, reflection coefficient is-24.1dB, and antenna gain is 1.35dB.
Three dB bandwidth is 886-940MHz as shown in Figure 3, and 10dB bandwidth is 910-926MHz, covers China 920-925MHz ultra-high frequency band.
As shown in Figure 5, the present invention's E face and H face directional diagram when working in 920MHz, as seen from the figure, inductance coupling high type of the present invention equidistantly bends Dipole RFID Tag Antenna radiation characteristic: E face half-power beam width is 98 °, directional diagram is 8-shaped, and H face directional diagram is a circle, there is good omnidirectional's characteristic.
Embodiment 2: when bending number of times is 4, adopt the Higgs-3 chip of Alien company, its impedance changes with the change of frequency, and when 920MHz, its testing impedance value is about 27-j200 Ω, designing antenna under this frequency.
Antenna structure view is as shown in Figure 2, as shown in table 2 by optimizing its parameter rear, unit: mm.
Table 2
| L 1 | L 2 | L 3 | s | RL | RW | d | W 1 | W 2 | d 1 | h |
| 10.8 | 9.6 | 2 | 5.2 | 18.6 | 13.4 | 2.8 | 1.5 | 1.5 | 1 | 0.8 |
Final optimization antenna size is 54.6mm × 26.4mm × 0.8mm, the impedance Z=27.47+j196.13 Ω of antenna, and can realize the impedance conjugate impedance match of antenna impedance and chip, reflection coefficient is-25.9dB, and antenna gain is 1.59dB.
Three dB bandwidth is 877-948MHz as shown in Figure 4, and 10dB bandwidth is 905-930MHz, covers China 920-925MHz ultra-high frequency band.
As shown in Figure 6, the present invention's E face and H face directional diagram when working in 920MHz, as seen from the figure, inductance coupling high type of the present invention equidistantly bends Dipole RFID Tag Antenna radiation characteristic: E face half-power beam width is 96 °, directional diagram is 8-shaped, and H face directional diagram is a circle, there is good omnidirectional's characteristic.
The present invention has wider impedance bandwidth, and structure is simple, and carries out secondary bending on width, reduces Aspect Ratio, reduces antenna volume, significantly improves with the increase antenna gain of bending number of times when keeping size suitable.
Although given two embodiments of the present invention, it will be understood by those of skill in the art that without departing from the spirit of the invention herein, can change embodiment herein.Above-described embodiment is exemplary, should using embodiment herein as the restriction of interest field of the present invention.
The above is only to better embodiment of the present invention, not any pro forma restriction is done to the present invention, every any simple modification done above execution mode according to technical spirit of the present invention, equivalent variations and modification, all belong in the scope of technical solution of the present invention.
Claims (7)
1. inductance coupling high type equidistantly bends a Dipole RFID Tag Antenna, it is characterized in that: comprise substrate (1), bending dipole radiators (2) and electric feedback ring (3); Bending dipole radiators (2) and electric feedback ring (3) are arranged on substrate (1), bending dipole radiators (2) is U-shaped, U-shaped both sides are bending shape, and electric feedback ring (3) is between U-shaped inside, U-shaped both sides.
2. equidistantly bend Dipole RFID Tag Antenna according to inductance coupling high type a kind of described in claim 1, it is characterized in that: the every two parts up and down in the U-shaped both sides of described bending dipole radiators (2) are all in being even-times bending, and top and the bottom structure axisymmetricly.
3. equidistantly bend Dipole RFID Tag Antenna according to inductance coupling high type a kind of described in claim 1, it is characterized in that: the angle of described U-shaped both sides bending is right angle.
4. equidistantly bend Dipole RFID Tag Antenna according to inductance coupling high type a kind of described in claim 1, it is characterized in that: described substrate (1) medium relative dielectric constant is the FR4 of 4.4; Substrate (1) is rectangular configuration, and thickness is 0.5mm-1.6mm.
5. equidistantly bend Dipole RFID Tag Antenna according to inductance coupling high type a kind of described in claim 1, it is characterized in that: described bending dipole radiators (2) and substrate (1) edge reserve 1mm blank.
6. equidistantly bend Dipole RFID Tag Antenna according to inductance coupling high type a kind of described in claim 1, it is characterized in that: described bending dipole radiators (2) kink height scope 9mm-11mm, bending width is consistent and scope is 2mm-5mm, live width scope is 1mm-5mm, electric feedback ring (3) mid point is 10mm-15mm to the distance range of nearest bending place, and antenna bent over arms spacing range is 4mm-9mm.
7. equidistantly bend Dipole RFID Tag Antenna according to inductance coupling high type a kind of described in claim 1, it is characterized in that: described electric feedback ring (3) rectangular structure, distance range apart from the nearest bending place of bending dipole radiators (2) is 1mm-5mm, input impedance imaginary part can be adjusted by changing its size, live width scope is 0.8mm-3mm, distributing point width range is 0.6mm-2mm, and the peripheral extent of electric feedback ring is 30mm-33mm.
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| CN201510047699.1A CN104638356A (en) | 2015-01-30 | 2015-01-30 | Inductive coupling type equally-spaced bending dipole RFID (Radio Frequency Identification) tag antenna |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105140632A (en) * | 2015-07-06 | 2015-12-09 | 中南大学 | Inductively coupled feed bending dipole RFID (radio frequency identification) tag antenna |
| CN105956650A (en) * | 2016-04-19 | 2016-09-21 | 中南大学 | RFID label antenna with open-circuit line feeding structure |
| 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 |
| CN108847525A (en) * | 2018-05-25 | 2018-11-20 | 哈尔滨工程大学 | A kind of compact multi-band antennas |
| CN109919288A (en) * | 2019-02-16 | 2019-06-21 | 江苏中科智睿物联网科技有限公司 | A kind of novel omnidirectional's washer wrinkle fabric label antenna |
| CN109948195A (en) * | 2019-02-27 | 2019-06-28 | 中国计量大学 | A kind of impedance modeling method of PCB RFID label tag bending dipole antenna |
| WO2019137522A1 (en) * | 2018-01-15 | 2019-07-18 | 深圳市信维通信股份有限公司 | Antenna unit, mimo antenna and handheld device |
| CN112364969A (en) * | 2020-11-12 | 2021-02-12 | 上海仪电特镭宝信息科技有限公司 | RFID label free from influence of attached object environment |
| CN112467354A (en) * | 2019-09-06 | 2021-03-09 | 莫冰 | Tunable ultrahigh frequency RFID (radio frequency identification) tag antenna and impedance tuning method thereof |
| CN112964936A (en) * | 2021-01-30 | 2021-06-15 | 天津理工大学 | Miniature antenna sensor sensitive to dielectric constant of surrounding environment |
| CN113871882A (en) * | 2021-08-31 | 2021-12-31 | 广东工业大学 | Multimode broadband filtering micro base station antenna |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101090175A (en) * | 2007-07-18 | 2007-12-19 | 北京邮电大学 | Superhigh frequency RFID universal label antenna of capacitor and inductance coupled |
| CN103022644A (en) * | 2012-12-10 | 2013-04-03 | 贵州师范大学 | Design method of miniaturization label buckling antenna of tire embedded radio frequency identification device (RFID) |
| CN204391265U (en) * | 2015-01-30 | 2015-06-10 | 董健 | A kind of inductance coupling high type equidistantly bends Dipole RFID Tag Antenna |
-
2015
- 2015-01-30 CN CN201510047699.1A patent/CN104638356A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101090175A (en) * | 2007-07-18 | 2007-12-19 | 北京邮电大学 | Superhigh frequency RFID universal label antenna of capacitor and inductance coupled |
| CN103022644A (en) * | 2012-12-10 | 2013-04-03 | 贵州师范大学 | Design method of miniaturization label buckling antenna of tire embedded radio frequency identification device (RFID) |
| CN204391265U (en) * | 2015-01-30 | 2015-06-10 | 董健 | A kind of inductance coupling high type equidistantly bends Dipole RFID Tag Antenna |
Non-Patent Citations (2)
| Title |
|---|
| H.-W. SON等: ""Design of RFID tag antennas using an inductively coupled feed"", 《ELECTRONICS LETTERS》 * |
| 夏小勇等: ""一种UHF频段的标签天线的设计与分析"", 《科学技术与工程》 * |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105140632B (en) * | 2015-07-06 | 2018-09-21 | 中南大学 | A kind of bending Dipole RFID Tag Antenna inductively fed |
| CN105140632A (en) * | 2015-07-06 | 2015-12-09 | 中南大学 | Inductively coupled feed bending dipole RFID (radio frequency identification) tag antenna |
| CN105956650A (en) * | 2016-04-19 | 2016-09-21 | 中南大学 | RFID label antenna with open-circuit line feeding structure |
| 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 |
| WO2019137522A1 (en) * | 2018-01-15 | 2019-07-18 | 深圳市信维通信股份有限公司 | Antenna unit, mimo antenna and handheld device |
| US10950953B2 (en) | 2018-01-15 | 2021-03-16 | Shenzhen Sunway Communication Co., Ltd. | Antenna unit, MIMO antenna and handheld device |
| CN108847525B (en) * | 2018-05-25 | 2021-07-16 | 哈尔滨工程大学 | Compact multi-band antenna |
| CN108847525A (en) * | 2018-05-25 | 2018-11-20 | 哈尔滨工程大学 | A kind of compact multi-band antennas |
| CN109919288A (en) * | 2019-02-16 | 2019-06-21 | 江苏中科智睿物联网科技有限公司 | A kind of novel omnidirectional's washer wrinkle fabric label antenna |
| CN109948195A (en) * | 2019-02-27 | 2019-06-28 | 中国计量大学 | A kind of impedance modeling method of PCB RFID label tag bending dipole antenna |
| CN112467354A (en) * | 2019-09-06 | 2021-03-09 | 莫冰 | Tunable ultrahigh frequency RFID (radio frequency identification) tag antenna and impedance tuning method thereof |
| CN112467354B (en) * | 2019-09-06 | 2023-05-02 | 莫冰 | Tunable ultrahigh frequency RFID tag antenna and impedance tuning method thereof |
| CN112364969A (en) * | 2020-11-12 | 2021-02-12 | 上海仪电特镭宝信息科技有限公司 | RFID label free from influence of attached object environment |
| CN112964936A (en) * | 2021-01-30 | 2021-06-15 | 天津理工大学 | Miniature antenna sensor sensitive to dielectric constant of surrounding environment |
| CN113871882A (en) * | 2021-08-31 | 2021-12-31 | 广东工业大学 | Multimode broadband filtering micro base station antenna |
| CN113871882B (en) * | 2021-08-31 | 2023-10-20 | 广东工业大学 | Multimode broadband filtering micro base station antenna |
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Effective date of registration: 20160105 Address after: Yuelu District City, Hunan province 410083 Changsha Lushan Road No. 932 Applicant after: Central South University Address before: 410075 No. 22 South Shaoshan Road, Tianxin District, Hunan, Changsha Applicant before: Dong Jian |
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Application publication date: 20150520 |