CN108448227A - A kind of reader antenna suitable for intensive counter - Google Patents
A kind of reader antenna suitable for intensive counter Download PDFInfo
- Publication number
- CN108448227A CN108448227A CN201810264016.1A CN201810264016A CN108448227A CN 108448227 A CN108448227 A CN 108448227A CN 201810264016 A CN201810264016 A CN 201810264016A CN 108448227 A CN108448227 A CN 108448227A
- Authority
- CN
- China
- Prior art keywords
- circular coil
- connecting wire
- reader antenna
- counter
- intensive
- 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
- H01Q1/12—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
-
- 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
Landscapes
- Near-Field Transmission Systems (AREA)
Abstract
The present invention relates to a kind of reader antennas suitable for intensive counter, including the first circular coil and the second circular coil, and first circular coil and the second circular coil around to consistent, the two ends of first circular coil are connect by the first connecting wire and the second connecting wire with the two ends of the second circular coil respectively, and distributing point is provided in first connecting wire, distributing point by coaxial cable with reader for being electrically connected.The antenna of the present invention is by the way of circular polarisation, can polarized label antenna offline to intensive environment match, read stability is good, and reading speed is fast, and read rate is high, with uniform range of signal and stronger gain, and it is simple in structure, cheap, signal is uniform, it is low to the read-write power requirement of RFID tag, and RFID tag reading performance is not influenced.
Description
Technical field
The present invention relates to field of radio frequency identification, and in particular to a kind of reader antenna suitable for intensive counter.
Background technology
RFID (Radio Frequency Identification) system is a kind of communication technology, can be believed by electromagnetic wave
Number carry out electromagnetic field coupling target is identified and reads and writes data, without with specific objective foundation be in direct contact.Nowadays radio frequency
Identification technology plays increasingly important role in life, during the technology sustainable development, reader antenna
Design plays an important role.Since the RFID system of shf band is remote with identification distance, recognition speed is fast and transmits
Efficient feature, therefore it is widely used in production and living.
In practical service environment, due to the compact storage of multi-tag, the impedance of label antenna is caused to change, label day
The resonant frequency of line is offset downward.Since the impedance of label antenna changes so that original reader antenna and label day
The impedance matching of line is failed, while the decline of resonant tag frequency causes reader antenna that can not read number in original working frequency range
The complete RFID tag of mesh, influences RFID tag reading performance.Current existing reader read-write antenna divides four using T-type micro-strip one
Power splitter is fed.The antenna involves great expense, and complex process, read stability is low, and needs larger input power, Wu Faman
The reader performance requirement of the intensive counter of foot.
Invention content
Technical problem to be solved by the invention is to provide a kind of performances stable, easy to use, low-cost to be suitable for
The reader antenna of intensive counter.
The technical solution that the present invention solves above-mentioned technical problem is as follows：
A kind of reader antenna suitable for intensive counter, including the first circular coil and the second circular coil, and it is described
First circular coil and the second circular coil around to consistent, the two ends of the first circular coil pass through the first connecting wire respectively
It is connect with the second connecting wire with the two ends of the second circular coil, and distributing point is provided in first connecting wire, presented
Electricity point by coaxial cable with reader for being electrically connected.
Further, at least one newly-increased circular coil, the newly-increased circle are wound in the middle part of second connecting wire
Coil around to the first circular coil and the second circular coil around to consistent.
Further, the horizontal segment of first connecting wire and the second connecting wire is mutually parallel.
Further, first circular coil, the second circular coil and newly-increased circular coil are by multiply thin wire group
At the big section heavy gauge wire coiling of bundle conductor or sub-thread form.
Further, the conducting wire is copper wire.
Further, it is provided with metallic plate above the first circular coil and the second circular coil, the metallic plate is for leading to
Reflecting antenna signal is crossed, signal is enhanced.Setting metallic plate, the gold can be according to circumstances chosen whether on circular coil
Belong to plate to be used to, by reflecting antenna signal, enhance signal.
Further, a diameter of 70mm-90mm of first circular coil and the second circular coil.
Further, the number of turns of first circular coil and the second circular coil is -7 circle of 3 circle.
Further, further include mounting box, first circular coil, the second circular coil, the first connecting wire and
Two connecting wires are arranged in mounting box, and the mounting box is made of nonmetallic materials.
Beneficial effects of the present invention are：The antenna of the present invention, can be to the offline pole of intensive environment by the way of circular polarisation
The label antenna of change is matched, and read stability is good, and reading speed is fast, and read rate is high, have uniform range of signal and compared with
Strong gain, and it is simple in structure, cheap, signal is uniform, low to the read-write power requirement of RFID tag, and does not influence RFID
Label reading performance.Bundle conductor or the big section heavy gauge wire coiling of sub-thread that the circular coil of the present invention is made of multiply thin wire and
At since the Kelvin effect of conductor enhances with the increase of frequency, the bundle conductor of multiply thin wire composition and the big section of sub-thread are thick
The total sectional area in skin depth region is bigger than common single cord area in conducting wire, therefore using the conducting wire of multiply thin wire composition
Beam or the big section heavy gauge wire of sub-thread have the function of reducing AC resistance.
Description of the drawings
Fig. 1 is the dimensional structure diagram of the present invention；
Fig. 2 is that the present invention is installed to the overlooking structure diagram after mounting box；
Fig. 3 is the counter inside front schematic view that the present invention is installed to after counter；
Fig. 4 is the directivity factor figure of existing intensive counter reader reading antenna；
Fig. 5 is the directivity of antenna figure of the present invention；
Fig. 6 is the horizontal radiation pattern of existing intensive counter reader reading antenna；
Fig. 7 is the faces the H pattern antenna horizontal radiation pattern of the present invention.
In attached drawing, parts list represented by the reference numerals are as follows：
1, the first circular coil；2, the second circular coil；3, the first connecting wire；4, the second connecting wire；5, distributing point；
6, mounting box；7, counter lattice；8, RFID tag；9, reader
Specific implementation mode
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the present invention.
As shown in Figure 1, a kind of reader antenna suitable for intensive counter, including the first circular coil 1 and second are round
Coil 2, and first circular coil 1 and the second circular coil 2, around to consistent, the two ends of the first circular coil 1 are distinguished
It is connect with the two ends of the second circular coil 2 by the first connecting wire 3 and the second connecting wire 4, and first connection is led
Distributing point 5 is provided on line 3, distributing point 5 by coaxial cable with reader 9 for being electrically connected.
The middle part of second connecting wire 4 is wound at least one newly-increased circular coil, the newly-increased circular coil around
To with the first circular coil 1 and the second circular coil 2 around to consistent.It in actual use, can be according to the usable floor area of antenna
Increase coil among two coils, can specifically increase by one, two, three or more, coil is more, the radiation model of antenna
Enclose bigger, the area that can be applicable in is bigger, and in the present embodiment, the number of overall coil is two, the first circular coil 1 and the
Without increasing coil among two circular coil 2.
The conducting wire that first circular coil 1, the second circular coil 2 and newly-increased circular coil are made of multiply thin wire
Beam or the big section heavy gauge wire coiling of sub-thread form.
The horizontal segment of first connecting wire, 3 and second connecting wire 4 is mutually parallel.At 4 middle part of the second connecting wire
When not having coiling, the horizontal segment of the second connecting wire 4 is the whole whole of the second connecting wire 4；It is led in the second connection
When 4 middle part of line is wound with coil, the horizontal segment of the second connecting wire 4 is the conducting wire at coil both ends.
The bundle conductor or the big section of sub-thread that first circular coil, 1 and second circular coil 2 is made of multiply thin wire
Heavy gauge wire coiling forms.In the present embodiment, the conducting wire is copper wire, and the first circular coil 1 and the second circular coil 2 are by same root
Conducting wire coiling forms, and the head and the tail both ends of conducting wire connect to form distributing point 5.
Setting metallic plate, the metal can be according to circumstances chosen whether on first circular coil 1 and the second circular coil 2
Plate is used to, by reflecting antenna signal, enhance signal.
A diameter of 70mm-90mm of first circular coil, 1 and second circular coil 2.
The number of turns of first circular coil, 1 and second circular coil 2 is -7 circle of 3 circle.
Further, further include mounting box 6, first circular coil 1, the second circular coil 2, the first connecting wire 3
It is arranged in mounting box 6 with the second connecting wire 4, and the mounting box 6 is made of nonmetallic materials.The mounting box of the present invention
Support fixed function is played to antenna, while can be convenient for adjusting the distance of the upper plate of antenna distance counter lattice, while mounting box makes
The installation for obtaining antenna is more beautiful.
For the antenna of the present invention especially suitable for intensive counter, the intensive counter includes multiple counter lattice 7, each counter lattice
It is placed with multiple articles for posting RFID tag 8 in 7, is respectively provided with that there are one readers 9 outside each counter lattice 7, and each
Reader 9 is both needed to one antenna of the invention of configuration.
As shown in Fig. 2, in use, the antenna that two circular coils form is fixed in mounting box, then mounting box is consolidated
It is scheduled on the inside of 7 upper plate of counter lattice, as shown in figure 3, multiple RFID tags 8 are placed in counter lattice 7, if the upper plate of counter lattice 7
It is metallic plate, then directly mounting box is mounted on the inside of the upper plate of counter lattice 7, then by the distributing point of antenna and 7 upper plate of counter lattice
It is connected using coaxial cable between the reader 9 in outside.It, need to be in mounting box if the upper plate of counter lattice 7 is not metallic plate
One piece of metallic plate is installed in top again, and iron, copper or aluminum plate can be used in metallic plate.Metallic plate and mounting box are co-mounted to
In counter lattice 7, then coaxial cable will be used to connect between the distributing point of antenna and reader 9.
It is illustrated in figure 4 the directivity factor figure of above-mentioned existing intensive counter reader reading antenna, is illustrated in figure 5
The directivity factor figure of the antenna of the present invention, wherein abscissa are angle, and ordinate is directivity factor, existing by can be seen that on figure
There is the gain of antenna unbalanced, and an intermediate fragment position gain is well below -20db, and the antenna major part yield value of the present invention
It is all higher than -20db, thus illustrates that the antenna gain of the present invention is significantly better than existing antenna, radiant power of the antenna to all directions
Compare balanced, the label in detection zone can be covered, it will not be due to influencing the reading so that label caused by the intensive environment of label
Rate reduces.
It is illustrated in figure 6 the horizontal radiation pattern of above-mentioned existing intensive counter reader reading antenna, is illustrated in figure 7
The faces antenna H pattern antenna horizontal radiation pattern, i.e., when overlooking from top to bottom, the pass of horizontal direction upper angle and antenna gain
System, the radiation direction by can be seen that existing antenna on figure is asymmetric, and side radiation gain is significantly smaller, and the antenna of the present invention
Radiation direction there is symmetry, while the radiation gain of antenna is much larger than existing antenna, and the more existing antenna of radiation effect has
Large increase.
The antenna of the present invention, can polarized label antenna progress offline to intensive environment by the way of circular polarisation
Match, read stability is good, and reading speed is fast, and read rate is high, has uniform range of signal and stronger gain, and structure letter
Single, cheap, signal is uniform, low to the read-write power requirement of RFID tag, and does not influence RFID tag reading performance.This hair
The big section heavy gauge wire coiling of bundle conductor or sub-thread that bright circular coil is made of multiply thin wire forms, due to the skin that becomes of conductor
Effect enhances with the increase of frequency, skin depth region in the bundle conductor and the big section heavy gauge wire of sub-thread of multiply thin wire composition
Total sectional area it is bigger than common sub-thread twisted wire area, therefore using multiply thin wire composition bundle conductor or the big section of sub-thread slightly lead
Line has the function of reducing AC resistance.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of reader antenna suitable for intensive counter, which is characterized in that round including the first circular coil (1) and second
Coil (2), and first circular coil (1) and the second circular coil (2) be around to consistent, the two of the first circular coil (1)
End is connect by the first connecting wire (3) and the second connecting wire (4) with the two ends of the second circular coil (2) respectively, and
Distributing point (5) is provided on first connecting wire (3), distributing point (5) by coaxial cable with reader (9) for being electrically connected
It connects.
2. the reader antenna according to claim 1 suitable for intensive counter, which is characterized in that second connection is led
Be wound at least one newly-increased circular coil in the middle part of line (4), the newly-increased circular coil around to the first circular coil (1) and
Second circular coil (2) around to consistent.
3. being suitable for the reader antenna of intensive counter according to any one of claim 1 or 2, which is characterized in that institute
The horizontal segment for stating the first connecting wire (3) and the second connecting wire (4) is mutually parallel.
4. the reader antenna according to claim 2 suitable for intensive counter, which is characterized in that first round wire
The bundle conductor or the big section of sub-thread that circle (1), the second circular coil (2) and newly-increased circular coil are made of multiply thin wire are slightly led
Line coiling forms.
5. the reader antenna according to claim 4 suitable for intensive counter, which is characterized in that the conducting wire is copper
Line.
6. the reader antenna according to claim 1 suitable for intensive counter, which is characterized in that the first circular coil
(1) and above the second circular coil (2) be provided with metallic plate, the metallic plate is used for through reflecting antenna signal, to signal into
Row enhancing.
7. the reader antenna according to claim 1 suitable for intensive counter, which is characterized in that first round wire
Enclose a diameter of 70mm-90mm of (1) and the second circular coil (2).
8. the reader antenna according to claim 1 suitable for intensive counter, which is characterized in that first round wire
The number of turns for enclosing (1) and the second circular coil (2) is -7 circle of 3 circle.
9. the reader antenna suitable for intensive counter according to any one of claim 1-8, which is characterized in that also wrap
Include mounting box (6), first circular coil (1), the second circular coil (2), the first connecting wire (3) and the second connecting wire
(4) it is arranged in mounting box (6).
10. the reader antenna according to claim 9 suitable for intensive counter, which is characterized in that the mounting box (6)
It is made of nonmetallic materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810264016.1A CN108448227A (en) | 2018-03-28 | 2018-03-28 | A kind of reader antenna suitable for intensive counter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810264016.1A CN108448227A (en) | 2018-03-28 | 2018-03-28 | A kind of reader antenna suitable for intensive counter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108448227A true CN108448227A (en) | 2018-08-24 |
Family
ID=63197588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810264016.1A Pending CN108448227A (en) | 2018-03-28 | 2018-03-28 | A kind of reader antenna suitable for intensive counter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108448227A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002124819A (en) * | 2000-10-13 | 2002-04-26 | Omron Corp | Antenna and non-contact discriminating system |
| WO2002045011A1 (en) * | 2000-12-01 | 2002-06-06 | Microcip Technology Incorporated | Inductively tunable antenna for a radio frequency identification tag |
| US20040004581A1 (en) * | 2002-07-03 | 2004-01-08 | Jatupum Jenwatanavet | Multicoil helical antenna and method for same |
| CN1953273A (en) * | 2005-10-19 | 2007-04-25 | 富士通株式会社 | Tag antenna, tag and rfid system using the same |
| JP2009303037A (en) * | 2008-06-16 | 2009-12-24 | Toshiba Corp | Antenna device and radio apparatus |
| CN102473244A (en) * | 2009-11-04 | 2012-05-23 | 株式会社村田制作所 | Wireless IC tag, reader/writer, and information processing system |
| CN103530680A (en) * | 2013-09-16 | 2014-01-22 | 杭州电子科技大学 | Dual-frequency radio frequency identification tag and radio frequency identification system with same |
| CN105609935A (en) * | 2015-11-10 | 2016-05-25 | 天津工业大学 | Intelligent planar array antenna of RFID reader |
| CN207994053U (en) * | 2018-03-28 | 2018-10-19 | 武汉纺织大学 | A kind of reader antenna suitable for intensive counter |
-
2018
- 2018-03-28 CN CN201810264016.1A patent/CN108448227A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002124819A (en) * | 2000-10-13 | 2002-04-26 | Omron Corp | Antenna and non-contact discriminating system |
| WO2002045011A1 (en) * | 2000-12-01 | 2002-06-06 | Microcip Technology Incorporated | Inductively tunable antenna for a radio frequency identification tag |
| US20040004581A1 (en) * | 2002-07-03 | 2004-01-08 | Jatupum Jenwatanavet | Multicoil helical antenna and method for same |
| CN1953273A (en) * | 2005-10-19 | 2007-04-25 | 富士通株式会社 | Tag antenna, tag and rfid system using the same |
| JP2009303037A (en) * | 2008-06-16 | 2009-12-24 | Toshiba Corp | Antenna device and radio apparatus |
| CN102473244A (en) * | 2009-11-04 | 2012-05-23 | 株式会社村田制作所 | Wireless IC tag, reader/writer, and information processing system |
| CN103530680A (en) * | 2013-09-16 | 2014-01-22 | 杭州电子科技大学 | Dual-frequency radio frequency identification tag and radio frequency identification system with same |
| CN105609935A (en) * | 2015-11-10 | 2016-05-25 | 天津工业大学 | Intelligent planar array antenna of RFID reader |
| CN207994053U (en) * | 2018-03-28 | 2018-10-19 | 武汉纺织大学 | A kind of reader antenna suitable for intensive counter |
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