CN108306103A - RFIDnt ultra-high frequency label antenna - Google Patents
RFIDnt ultra-high frequency label antenna Download PDFInfo
- Publication number
- CN108306103A CN108306103A CN201810094434.0A CN201810094434A CN108306103A CN 108306103 A CN108306103 A CN 108306103A CN 201810094434 A CN201810094434 A CN 201810094434A CN 108306103 A CN108306103 A CN 108306103A
- Authority
- CN
- China
- Prior art keywords
- radiation
- inductive loop
- antenna
- element antenna
- balance portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
- H01Q1/2225—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
Abstract
The present invention discloses a kind of RFIDnt ultra-high frequency label antenna, including inductive loop, element antenna A and element antenna B, element antenna A and element antenna B are about inductive loop symmetry arrangement, element antenna A includes radiation balance portion A and radiation strengthening portion A, element antenna B includes radiation balance portion B and radiates strengthening portion B, and balance portion A is electrically connected with inductive loop, and radiation strengthening portion A is electrically connected with balance portion A, radiation balance portion B is electrically connected with inductive loop, and radiation strengthening portion B is electrically connected with radiation balance portion B.Intermediate inductive loop is used for balanced feeding, the element antenna A and element antenna B of symmetry arrangement can carry out Net long wave radiation to the information in RFID chip, the structure of the present invention is simple, and design is scientific and reasonable, all has stronger radiation effect in all directions, and loss is smaller, NXP Ucode7 chips can be based on as data medium, data capacity is big, distinguishes high sensitivity, it is not reproducible, it has a safety feature.
Description
Technical field
The present invention relates to a kind of RFIDnt ultra-high frequency label antennas.
Background technology
RFID Radio Frequency Identification Technology is one kind of automatic identification technology, and non-contact two-way number is carried out by wireless radio frequency mode
According to communication, related data is identified and obtained to target, radio-frequency recognition system is by RFID electronic label, reader and middleware
Three parts are constituted.
Electronic tag has been applied to entrance guard management, non-parking charge, warehousing management, automobile assembling, apparel applications, has moved at present
The development of the multiple fields such as property management reason, RFID antenna technology has the maturation of Radio Frequency Identification Technology and extensive use
Very important meaning, under different application environments, the label antenna of electronic tag is also required to different size and performance
It is required that traditional automatic identification technology, such as bar code, recognition rate is poor, memory capacity bottom, and reproducible, poor safety performance is existing
RFID label antenna is mostly based on 920~925MHz or 860~865MHz frequency ranges, and antenna frequency point is by base when being pasted onto body surface
The influence of material, frequency point can drift about, to influence performance.
Invention content
The object of the present invention is to provide a kind of RFIDnt ultra-high frequency label antennas, to solve the above technical problems at least one
It is a.
According to an aspect of the invention, there is provided a kind of RFIDnt ultra-high frequency label antenna, including inductive loop, element antenna
About inductive loop symmetry arrangement, element antenna A includes radiation balance portion A by A and element antenna B, element antenna A and element antenna B
Include that radiation balance portion B is electrically connected with radiation strengthening portion B, balance portion A with inductive loop with radiation strengthening portion A, element antenna B, spoke
It penetrates strengthening portion A to be electrically connected with balance portion A, radiation balance portion B is electrically connected with inductive loop, radiation strengthening portion B and radiation balance portion B electricity
Connection.
In the present invention, intermediate inductive loop is used for balanced feeding, and the element antenna A and element antenna B of symmetry arrangement can be with
Net long wave radiation is carried out to the information in RFID chip, structure of the invention is simple, and design is scientific and reasonable, all has in all directions
Stronger radiation effect, and loss is smaller, can be based on NXP Ucode7 chips as data medium, data capacity is big, knows
High sensitivity is read, it is not reproducible, it has a safety feature.
In some embodiments, inductive loop can be square.The inductive loop being square as a result, can be presented with active balance
Electricity, inductive loop are coiled into coil by feeder line, and the electric current of inductive loop is maximum mutually close in certain with radiator, thus to radiation
Body-sensing couple feed, therefore the size for adjusting inductive loop can effectively adjust feed.
In some embodiments, exit A and exit B, exit A and exit B can be equipped on inductive loop to close
In inductive loop symmetry arrangement, radiation balance portion A is electrically connected with exit A, and radiation balance portion B is electrically connected with exit B.As a result,
Exit A and exit B can carry out Net long wave radiation, RFID chip about inductive loop symmetry arrangement to the information in RFID chip
In information by exit A, radiation balance portion A, radiation strengthening portion A radiate, the information in RFID chip passes through extraction
End B, radiation balance portion B, radiation strengthening portion beta radiation are gone out.
In some embodiments, exit A and exit B can be in that horizontal symmetrical is arranged.It is in horizontal symmetrical as a result,
The exit A and exit B of setting may insure that antenna all has stronger radiation effect in all directions.
In some embodiments, radiation balance portion A and radiation balance portion B can be in bending.Radiation balance as a result,
Portion A and radiation balance portion B can adjust the imaginary part part of antenna impedance, can be by adjusting radiation balance portion A and radiation balance
The number of inflections and line width of portion B reaches the optimum radiation performance of antenna, the radiation balance portion A continuously bent and radiation balance portion
The electric current of B has opposite phase, can provide the reactance of capacitive and perception simultaneously, they cancel out each other, and resonant frequency is caused to subtract
It is small, and then the variation of input resistance is influenced, when the matches impedances of RFID label antenna and RFID chip, radiance is most
It is good.
In some embodiments, the number of inflections of radiation balance portion A and radiation balance portion B can be multiple.Root as a result,
It is needed according to radiation, adjusts the number of inflections of radiation balance portion A and radiation balance portion B to reach the optimum radiation performance of antenna.
In some embodiments, radiation strengthening portion A and radiation strengthening portion B can be in cat ladder shape.It is in cat ladder as a result,
The radiation strengthening portion A and radiation strengthening portion B of shape may insure that antenna all has stronger radiation effect in all directions.
In some embodiments, one end of radiation strengthening portion A, which can be equipped with, reinforces extension A, reinforces extension A and spoke
Strengthening portion A vertical arrangements are penetrated, one end of radiation strengthening portion B, which can be equipped with, reinforces extension B, reinforces extension B and radiation is reinforced
Portion's B vertical arrangements.The radiation effect of antenna can be further increased by reinforcing extension A and reinforcement extension B as a result,.
Description of the drawings
Fig. 1 is the structural schematic diagram of the RFIDnt ultra-high frequency label antenna of one embodiment of the present invention；
Fig. 2 is the structural schematic diagram that strengthening portion A is radiated in RFIDnt ultra-high frequency label antenna shown in FIG. 1 along the directions A；
Fig. 3 is the structural schematic diagram that strengthening portion B is radiated in RFIDnt ultra-high frequency label antenna shown in FIG. 1 along the directions B.
Specific implementation mode
Present invention will be explained in further detail below in conjunction with the accompanying drawings.
Fig. 1 to Fig. 3 schematically shows the structure of the RFIDnt ultra-high frequency label antenna of one embodiment of the present invention.
As shown in Figure 1 to Figure 3, RFIDnt ultra-high frequency label antenna, including inductive loop 1, element antenna A2 and element antenna B3.
In addition, RFIDnt ultra-high frequency label antenna can also include exit A4, exit B5, reinforce extension A23 and reinforce extension
B33。
As shown in Figure 1, inductive loop 1 is square (such as rectangle), the inductive loop 1 being square can be used for balanced feeding, inductance
Circle 1 is coiled into coil by feeder line, and the electric current of inductive loop 1 is maximum mutually close in certain with radiator, thus to radiation body-sensing
Property couple feed, therefore adjust inductive loop 1 size can effectively adjust feed.
As shown in Figure 1,1 top of inductive loop is connected with exit A4 and exit B5, exit A4 and exit B5
About 1 symmetrical arrangement of inductive loop, exit A4 and exit B5 are arranged in horizontal symmetrical, in the extraction of horizontal symmetrical setting
End A4 and exit B5 may insure that antenna all has stronger radiation effect in all directions.
As shown in Figure 1, element antenna A2 and element antenna B3 is about 1 symmetrical arrangement of inductive loop, element antenna A2 and
The structure of element antenna B3 is identical with shape.
As shown in Figure 1, element antenna A2 include radiation balance portion A21 and radiation strengthening portion A22, radiation balance portion A21 with
Exit A4 integrally connecteds, radiate strengthening portion A22 and radiation balance portion A21 integrally connecteds, and the information in RFID chip can lead to
Exit A4, radiation balance portion A21, radiation strengthening portion A22 is crossed to radiate.
As shown in Figure 1, element antenna B3 include radiation balance portion B31 and radiation strengthening portion B32, radiation balance portion B31 with
Exit B5 integrally connecteds radiate strengthening portion B32 and radiation balance portion B31 integrally connecteds, and the information in RFID chip is by drawing
Outlet B5, radiation balance portion B31, radiation strengthening portion B32 are radiate.
As shown in Figure 1, radiation balance portion A21 is in bending, radiation balance portion A21 can adjust the imaginary part portion of antenna impedance
Point, the optimum radiation performance of antenna can be reached by the number of inflections and line width for adjusting radiation balance portion A21.
As shown in Figure 1, in the present embodiment, the number of inflections of radiation balance portion A21 is 1.In other embodiments, according to
Radiation needs, and can adjust the number of inflections (two or more) of radiation balance portion A21 to reach the optimum radiation performance of antenna.
As shown in Figure 1, radiation balance portion B31 is in bending, radiation balance portion B31 can adjust the imaginary part portion of antenna impedance
Point, the optimum radiation performance of antenna can be reached by the number of inflections and line width for adjusting radiation balance portion B31.
As shown in Figure 1, in the present embodiment, the number of inflections of radiation balance portion B31 is 1.In other embodiments, according to
Radiation needs, and can adjust the number of inflections (two or more) of radiation balance portion B31 to reach the optimum radiation performance of antenna.
The electric current of the radiation balance portion A21 and radiation balance portion B31 that continuously bend have opposite phase, can provide simultaneously
The reactance of capacitive and perception, they cancel out each other, and resonant frequency is caused to reduce, and then influence the variation of input resistance, work as RFID
When label antenna and the matches impedances of RFID chip, radiance is best.
As shown in Figure 1, radiation strengthening portion A22 is in cat ladder shape, i.e. horizontal positioned trapezoidal turn over to the left turn 90 degrees, and is in cat ladder
The radiation strengthening portion A22 of shape may insure that antenna all has stronger radiation effect in all directions.
As shown in Figure 1, radiation strengthening portion B32 is in cat ladder shape, i.e. horizontal positioned trapezoidal turn over to the right turn 90 degrees, and is in cat ladder
The radiation strengthening portion B32 of shape may insure that antenna all has stronger radiation effect in all directions.
As depicted in figs. 1 and 2, the upper end of radiation strengthening portion A22, which is connected with, reinforces extension A23, reinforces extension
A23 and radiation strengthening portion A22 vertical arrangements, i.e.,：The upper end for radiating strengthening portion A22, which is bent 90 degree, can form reinforcement extension
A23, the radiation effect of antenna can be further increased by reinforcing extension A23.
As shown in figures 1 and 3, the upper end of radiation strengthening portion B32, which is connected with, reinforces extension B33, reinforces extension
B33 and radiation strengthening portion B32 vertical arrangements, i.e.,：The upper end for radiating strengthening portion B32, which is bent 90 degree, can form reinforcement extension
B33, the radiation effect of antenna can be further increased by reinforcing extension B33.
In the present invention, after the Outside Dimensions for determining label antenna, base antenna model is drawn out in Auto CAD, is imported
To Ansoft HFSS simulation softwares, it is arranged and carries out analog simulation, observation emulation knot by modeling, parameter modification, boundary condition
The frequency of fruit and the tag antenna design, return loss and other parameters are close, design antenna and free space and its be connected
Label chip impedance reach matching, then optimization is finely adjusted to the line style of antenna, ensures that antenna has in actual application environment
Preferable performance.
By test, (extend element antenna A2, the right and lefts element antenna B3 when extending the size of antenna left and right directions
To size), the resonant frequency of antenna can be made to decline, 1 contour structures of inductive loop are rectangular (rectangle), can play balanced feeding
The size of effect, adjustment inductive loop 1 can adjust the real part part of antenna impedance, when increasing the size up and down of inductive loop 1, antenna
Resonant frequency can reduce, radiation balance portion A21 and radiation balance portion B31 can adjust the imaginary part part of antenna impedance, and
The optimal performance of antenna can be reached by adjusting the number of inflections and line width of radiation balance portion A21 and radiation balance portion B31.
In the present invention, intermediate inductive loop 1 is used for balanced feeding, when suitably adjusting the size of inductive loop 1, thus it is possible to vary antenna impedance
The length of real part part, element antenna A2 and element antenna B3 can be comparable with 1/4 wavelength, are in the radiation balance portion of bending
A21 and radiation balance portion B31 can adjust the imaginary part part of antenna impedance.Antenna in the present invention passes through humorous after design and simulation
Vibration frequency is 900MHz, and the clawback loss at the resonance point is -49.87db, the impedance matching with RFID label chip, the present invention
RFIDnt ultra-high frequency label antenna by drawing a design test, with the circular polarized antenna of 8dbi, under the power of 32.5dbm, reading away from
From being 7 meters, all there is stronger radiation effect in all directions；The structure of the present invention is simple, and design is scientific and reasonable, and is lost
It is smaller, NXP Ucode7 chips can be based on as data medium, data capacity is big, distinguishes high sensitivity, not reproducible, safety
Performance is good.
Above-described is only some embodiments of the present invention.For those of ordinary skill in the art, not
Under the premise of being detached from the invention design, various modifications and improvements can be made, these belong to the protection model of the present invention
It encloses.
Claims (8)
1.RFID ultrahigh-frequency tag antennas, which is characterized in that including inductive loop (1), element antenna A (2) and element antenna B (3),
About inductive loop (1) symmetry arrangement, element antenna A (2) includes radiation balance by the element antenna A (2) and element antenna B (3)
Portion A (21) and radiation strengthening portion A (22), element antenna B (3) include radiation balance portion B (31) and radiation strengthening portion B (32), institute
It states radiation balance portion A (21) to be electrically connected with inductive loop (1), radiation strengthening portion A (22) is electrically connected with radiation balance portion A (21), spoke
It penetrates balance portion B (31) to be electrically connected with inductive loop (1), radiation strengthening portion B (32) is electrically connected with radiation balance portion B (31).
2. RFIDnt ultra-high frequency label antenna according to claim 1, which is characterized in that the inductive loop (1) is square.
3. RFIDnt ultra-high frequency label antenna according to claim 1, which is characterized in that the inductive loop (1), which is equipped with, draws
Outlet A (4) and exit B (5), exit A (4) and exit B (5) are about inductive loop (1) symmetry arrangement, radiation balance portion A
(21) it is electrically connected with exit A (4), radiation balance portion B (31) is electrically connected with exit B (5).
4. RFIDnt ultra-high frequency label antenna according to claim 3, which is characterized in that the exit A (4) and exit
B (5) is in that horizontal symmetrical is arranged.
5. RFIDnt ultra-high frequency label antenna according to any one of claims 1 to 4, which is characterized in that the radiation is flat
Weighing apparatus portion A (21) and radiation balance portion B (31) is in bending.
6. RFIDnt ultra-high frequency label antenna according to claim 5, which is characterized in that the radiation balance portion A (21) and
The number of inflections of radiation balance portion B (31) is multiple.
7. RFIDnt ultra-high frequency label antenna according to any one of claims 1 to 4, which is characterized in that the radiation adds
Strong portion A (22) and radiation strengthening portion B (32) is in cat ladder shape.
8. RFIDnt ultra-high frequency label antenna according to claim 7, which is characterized in that the radiation strengthening portion A (22)
One end, which is equipped with, reinforces extension A (23), reinforces extension A (23) and radiation strengthening portion A (22) vertical arrangement, radiation strengthening portion B
(32) one end, which is equipped with, reinforces extension B (33), reinforces extension B (33) and radiation strengthening portion B (32) vertical arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810094434.0A CN108306103A (en) | 2018-01-31 | 2018-01-31 | RFIDnt ultra-high frequency label antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810094434.0A CN108306103A (en) | 2018-01-31 | 2018-01-31 | RFIDnt ultra-high frequency label antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108306103A true CN108306103A (en) | 2018-07-20 |
Family
ID=62867436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810094434.0A Pending CN108306103A (en) | 2018-01-31 | 2018-01-31 | RFIDnt ultra-high frequency label antenna |
Country Status (1)
| Country | Link |
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| CN (1) | CN108306103A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110770972A (en) * | 2018-08-22 | 2020-02-07 | 深圳市大疆创新科技有限公司 | Antenna and unmanned aerial vehicle |
| CN111478018A (en) * | 2020-04-15 | 2020-07-31 | 合肥工业大学 | Radio frequency identification tag antenna applied to dense environment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202870872U (en) * | 2012-08-16 | 2013-04-10 | 厦门信达物联科技有限公司 | Electronic tag |
| CN203813024U (en) * | 2014-01-28 | 2014-09-03 | 杭州电子科技大学 | UHF RFID tag 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 |
| CN204538239U (en) * | 2015-04-27 | 2015-08-05 | 中国计量学院 | Water tower microstrip |
| CN105226381A (en) * | 2015-09-09 | 2016-01-06 | 天津理工大学 | A miniaturized hyperfrequency bending dipole antenna |
| CN206312194U (en) * | 2016-08-15 | 2017-07-07 | 深圳市科盛通信技术有限公司 | A kind of electronic tag for clothing |
-
2018
- 2018-01-31 CN CN201810094434.0A patent/CN108306103A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202870872U (en) * | 2012-08-16 | 2013-04-10 | 厦门信达物联科技有限公司 | Electronic tag |
| CN203813024U (en) * | 2014-01-28 | 2014-09-03 | 杭州电子科技大学 | UHF RFID tag 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 |
| CN204538239U (en) * | 2015-04-27 | 2015-08-05 | 中国计量学院 | Water tower microstrip |
| CN105226381A (en) * | 2015-09-09 | 2016-01-06 | 天津理工大学 | A miniaturized hyperfrequency bending dipole antenna |
| CN206312194U (en) * | 2016-08-15 | 2017-07-07 | 深圳市科盛通信技术有限公司 | A kind of electronic tag for clothing |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110770972A (en) * | 2018-08-22 | 2020-02-07 | 深圳市大疆创新科技有限公司 | Antenna and unmanned aerial vehicle |
| CN110770972B (en) * | 2018-08-22 | 2022-04-08 | 深圳市大疆创新科技有限公司 | Antenna and unmanned aerial vehicle |
| 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 |
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Application publication date: 20180720 |
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