CN207441958U - A UHF radio frequency identification anti-metal tag antenna - Google Patents
A UHF radio frequency identification anti-metal tag antenna Download PDFInfo
- Publication number
- CN207441958U CN207441958U CN201721230660.4U CN201721230660U CN207441958U CN 207441958 U CN207441958 U CN 207441958U CN 201721230660 U CN201721230660 U CN 201721230660U CN 207441958 U CN207441958 U CN 207441958U
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- antenna
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- tie type
- type dipole
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Abstract
Invented a UHF radio frequency identification anti-metal tag antenna herein, the antenna by medium substrate upper table surface antenna structure, medium substrate, metallization VIA, metal four parts form.Antenna structure includes rectangle feeder line, bow-tie type dipole antenna and rectangular aperture ring structure, and chip both ends are fed by rectangle feeder line to bow-tie type dipole antenna, and bow-tie type dipole antenna is respectively equipped with rectangular aperture ring structure in both sides up and down., metallization VIA is with connecting bow-tie type dipole antenna and metal equipped with metal for medium substrate bottom surface.Rectangular aperture ring structure improves antenna gain by being coupled with bow-tie type dipole antenna.Metallization VIA with connecting bow-tie type dipole antenna and metal, reduces influence of the metal to antenna, realizes anti-metal function.The 10dB bandwidth of the label antenna is 402MHz (611 1013MHz), and directional diagram has omni-directional, and in 840 960MHz, antenna gain scope is 3 3.9dBi, can be applied to the scenes such as Car license recognition.
Description
Technical field
The utility model patent is related to a kind of label antenna, especially a kind of super high frequency radio frequency identification (UHF RFID) anti-gold
Belong to label antenna, belong to RFID label antenna technical field.
Background technology
Super high frequency radio frequency identification (UHF RFID) technology is a kind of technology identified using radio into row information.Hyperfrequency
Product information can be stored in the electronic chip of super high frequency radio frequency identification label by Radio Frequency Identification Technology, and can unique identification production
The identity of product, so having a clear superiority in storage product information.Internet of things system is the developing direction of following article interconnection, and
Super high frequency radio frequency identification technology is the indispensable component of Internet of things system, in the management of commodity and article and traffic pipe
There is important application in reason, and in super high frequency radio frequency identification technology, the design of label antenna is one of key technology.Therefore,
The research of ultra-high frequency radio-frequency identification label antenna is of great significance to China.
In the numerous applications of RFID, the super high frequency radio frequency identification label there are many in the case of needs to be covered in metallic conductor table
Face or by the higher object of closer electric conductivity, such as container surface, surface of vehicle.And most of super high frequency radio frequency identifications
Label antenna is dipole form or changes from dipole form.When dipole antenna is positioned proximal to metal or class
Metallike can cause label frequency to deviate working band when the position of high conductivity materials, and gain declines, and reading performance reduces
Etc. performances deterioration.This causes use of the super high frequency radio frequency identification label in metal surface to be restricted.In order to solve hyperfrequency
RFID tag is applied to the problem of metal surface, it is necessary to the design method of UHF radio frequency identification anti-metal tag into
Row explore, solves the problems, such as label antenna be positioned over metal surface influence tag performance this, raising super high frequency radio frequency identification technology
Application range, the reliability of lifting system.Meanwhile traditional hyperfrequency anti-metal tag antenna is very low with gain, and
The shortcomings that its smaller bandwidth.The utility model patent proposes a high gain, bandwidth on the basis of traditional handicraft, can
Cover the UHF radio frequency identification anti-metal tag antenna of various countries' frequency range.
The content of the invention
The utility model patent is directed to the problem of UHF radio frequency identification anti-metal, and provide a kind of can read in metal surface
It takes, the UHF radio frequency identification anti-metal tag antenna of bandwidth, high gain.Invention herein is anti-for the identification of a super high frequency radio frequency
Metal tag antenna, the antenna is by four medium substrate upper table surface antenna structure, medium substrate, metallization VIA, metal ground portions
Divide and form.Antenna structure includes rectangle feeder line, bow-tie type dipole antenna and rectangular aperture ring structure.Label chip passes through rectangle
Feeder line is fed to bow-tie type dipole antenna, adjusts the total length and bow-tie type dipole day of bow-tie type dipole antenna part
Rectangle and trapezoidal ratio can make label antenna reach conjugate impedance match with label chip in line；Two rectangular aperture ring structure difference
The both sides above and below bow-tie type dipole antenna are coupled with bow-tie type dipole antenna part, improve antenna gain.My god
, bow-tie type dipole antenna or so two-arm with connecing metal, is reduced by metallization VIA equipped with metal for line medium substrate bottom surface
Metal realizes anti-metal function to the radiation effect of antenna.
- 10dB the bandwidth of the label antenna is 402MHz (611-1013MHz), and directional diagram has omni-directional.In 840-
960MHz, antenna gain scope are 3-3.9dBi.
The advantages of the utility model patent, is：
1) the utility model patent bow-tie type dipole is connected with metal using metallization VIA, reduces metal to antenna
Influence, so as to fulfill anti-metal function.
2) the utility model patent improves antenna gain with the coupling of rectangular aperture ring structure and bow-tie type dipole antenna,
Antenna gain is made to reach 3-3.9dBi.
3) whole frequency ranges that the utility model patent covering 840-960MHz, covering UHF RFID various countries use.
4) the utility model patent is small, simple in structure, easy to process, suitable for plurality of application scenes, such as electronics vehicle
Board etc..
Description of the drawings
Fig. 1 is UHF radio frequency identification anti-metal tag antenna top view；
Fig. 2 is UHF radio frequency identification anti-metal tag antenna side view；
Fig. 3 is the reflection coefficient chart of UHF radio frequency identification anti-metal tag antenna；
Fig. 4 is xoz the and yoz faces directional diagram of UHF radio frequency identification anti-metal tag antenna；
Fig. 5 is the gain of UHF radio frequency identification anti-metal tag antenna with frequency variation curve figure；
In figure, 1 bow-tie type dipole antenna left arm, 2 bow-tie type dipole antenna right arms, 3,4 rectangle feeder lines, 5,6 rectangles
Open ring structure, 7,8 metallization VIAs, 9 label chips, 10 metals, 11 medium substrates.
Specific embodiment
This programme is UHF radio frequency identification anti-metal tag antenna, is carried out as described in detail below with reference to attached drawing.
The utility model patent is a anti-metal tag antenna applied to super high frequency radio frequency identification, and the antenna is by medium
Upper surface of base plate antenna structure, medium substrate, metallization VIA, metal four part form.
Antenna structure includes rectangle feeder line 3,4, bow-tie type dipole antenna left arm 1 and bow-tie type dipole antenna right arm 2
And rectangular aperture ring structure 5,6.Wherein, label chip 9 gives bow-tie type dipole antenna 1,2 respectively by rectangle feeder line 3,4
Feed.Total length and the bow-tie type for adjusting bow-tie type dipole antenna left arm 1 and bow-tie type dipole antenna right arm 2 simultaneously are even
Rectangle part and the length ratio of trapezoidal portions in pole sub-antenna left arm 1 and bow-tie type dipole antenna right arm 2, can be adjusted
UHFRFID anti-metal tag antenna antenna reactances part, makes it reach conjugate impedance match with label chip 9.
Metallization VIA 7 connects bow-tie type dipole antenna left arm 1 10 with metal through medium substrate 11, metallizes
Hole 8 connects bow-tie type dipole antenna right arm 2 10 with metal through medium substrate 11, to reduce metal to aerial radiation shadow
It rings, realizes anti-metal function.
Rectangular aperture ring structure 5,6 is located at bow-tie type dipole antenna left arm 1 and bow-tie type dipole antenna right arm 2 respectively
Both sides up and down, with bow-tie type dipole antenna left arm 1 and bow-tie type dipole antenna right arm 2 formation couple.Increased by coupling
The strong radiation of rectangular aperture ring structure 5,6, improves antenna gain.
The utility model patent is a anti-metal tag antenna applied to super high frequency radio frequency identification, and medium substrate uses
Polytetrafluoroethylene material, relative dielectric constant 2.65, loss angle tangent 0.001, dielectric substrate thickness 3mm.Bow-tie type
The a length of 20mm of rectangle in dipole antenna left arm 1 and bow-tie type dipole antenna right arm 2, line width 16mm, trapezoidal a height of 19mm.Square
Shape split ring 3,4 a length of 186.4mm, line width 2mm, be open a length of 1.6mm, line width 2mm.
The utility model patent be it is a applied to super high frequency radio frequency identification anti-metal tag antenna, artificial reflections system
The results are shown in Figure 3 for number, the results showed that, the Antenna Operation is in 842.5MHz, in 611-1013MHz, the reflectance factor of the antenna
Less than -10dB, various countries' UHF RFID frequency ranges are covered.Antenna xoz the and yoz faces of 842.5MHz directional diagram as shown in figure 4, its
Radiation has omni-directional, and applying to can make label is good to be identified by reading and writing device antenna in practice.Antenna gain is with frequency
For change curve as shown in figure 5, in 840-960MHz, antenna gain scope is 3~3.9dBi.
Although this hair said program is described the specific embodiment of the utility model patent with reference to attached drawing, simultaneously
Non- wound that is non-to limit the utility model patent protection domain, being done on the basis of the technical solution of the utility model patent
The modification or deformation for the property made, all in the utility model patent protection domain.
Claims (3)
1. a UHF radio frequency identification anti-metal tag antenna, the antenna is by medium substrate upper table surface antenna structure, medium base
Plate, metallization VIA, metal four part form, it is characterized in that medium substrate upper table surface antenna structure include rectangle feeder line,
Bow-tie type dipole antenna and rectangular aperture ring structure, metal be located at medium substrate lower surface, bow-tie type dipole antenna with
It is connected by metallization VIA, label chip is fed by rectangle feeder line to bow-tie type dipole antenna, and bow-tie type is even metal
Pole sub-antenna is respectively equipped with rectangular aperture ring structure in both sides up and down, rectangular aperture ring structure by with bow-tie type dipole antenna coupling
Conjunction improves antenna gain.
2. UHF radio frequency identification anti-metal tag antenna according to claim 1, it is characterised in that：It is even to adjust bow-tie type
Trapezoidal portions and the ratio of rectangle part, can make label day in the total length of pole sub-antenna part and bow-tie type dipole antenna
Line reaches conjugate impedance match with label chip.
3. UHF radio frequency identification anti-metal tag antenna according to claim 1, it is characterised in that：Bow-tie type dipole
Antenna or so two-arm with connecting metal, reduces influence of the metal to antenna, so as to fulfill anti-metal by metallization VIA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721230660.4U CN207441958U (en) | 2017-09-22 | 2017-09-22 | A UHF radio frequency identification anti-metal tag antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721230660.4U CN207441958U (en) | 2017-09-22 | 2017-09-22 | A UHF radio frequency identification anti-metal tag antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207441958U true CN207441958U (en) | 2018-06-01 |
Family
ID=62294542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721230660.4U Active CN207441958U (en) | 2017-09-22 | 2017-09-22 | A UHF radio frequency identification anti-metal tag antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207441958U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111224232A (en) * | 2018-11-23 | 2020-06-02 | 比亚迪股份有限公司 | Dual-band omnidirectional antenna and train |
| CN111478018A (en) * | 2020-04-15 | 2020-07-31 | 合肥工业大学 | Radio frequency identification tag antenna applied to dense environment |
| CN114444624A (en) * | 2020-10-30 | 2022-05-06 | 菜鸟智能物流控股有限公司 | Transmission line, antenna, radio frequency identification device and identification apparatus |
| CN114665259A (en) * | 2022-04-15 | 2022-06-24 | 合肥工业大学 | Ultra-wideband tag antenna suitable for metal liquid cross-coupling environment |
-
2017
- 2017-09-22 CN CN201721230660.4U patent/CN207441958U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111224232A (en) * | 2018-11-23 | 2020-06-02 | 比亚迪股份有限公司 | Dual-band omnidirectional antenna and train |
| CN111478018A (en) * | 2020-04-15 | 2020-07-31 | 合肥工业大学 | Radio frequency identification tag antenna applied to dense environment |
| CN111478018B (en) * | 2020-04-15 | 2021-04-20 | 合肥工业大学 | Radio frequency identification tag antenna applied to dense environment |
| CN114444624A (en) * | 2020-10-30 | 2022-05-06 | 菜鸟智能物流控股有限公司 | Transmission line, antenna, radio frequency identification device and identification apparatus |
| CN114665259A (en) * | 2022-04-15 | 2022-06-24 | 合肥工业大学 | Ultra-wideband tag antenna suitable for metal liquid cross-coupling environment |
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