CN107092955A - A kind of impedance regulation label antenna and electronic tag - Google Patents
A kind of impedance regulation label antenna and electronic tag Download PDFInfo
- Publication number
- CN107092955A CN107092955A CN201710436242.9A CN201710436242A CN107092955A CN 107092955 A CN107092955 A CN 107092955A CN 201710436242 A CN201710436242 A CN 201710436242A CN 107092955 A CN107092955 A CN 107092955A
- Authority
- CN
- China
- Prior art keywords
- antenna
- label
- impedance
- pole plate
- label antenna
- 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.)
- Pending
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Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
- G06K19/07773—Antenna details
- G06K19/07775—Antenna details the antenna being on-chip
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/0772—Physical layout of the record carrier
Abstract
The present invention relates to a kind of impedance regulation label antenna and electronic tag, the label antenna includes：Metallic reflection bottom plate (1), antenna body (2), guide pole plate (3), insulated column (4) and fixing device (5) into, the pole plate (3) of guiding into is connected by the fixing device (5) with the antenna body (2)；It is fixed by the insulated column (4) between the metallic reflection bottom plate (1) and the antenna body (2).The present invention is using metallic reflection bottom plate and guides pole plate into, has the advantages that anti-metal interference, the radio frequency identification that can be used under metal environment.Guide polar plate position into adjust input impedance by regulation, it is simple to operate understandable；On the premise of without changing antenna body, the reliability that label is used is improved.
Description
Technical field
The present invention relates to antenna technical field, more particularly to a kind of impedance regulation label antenna and electronic tag.
Background technology
Radio frequency identification (Radio Frequency Identification, RFID) technology be rising in recent years it is a kind of from
Dynamic identification technology, radio-frequency recognition system includes RFID, RFID reader.Electronic tag includes label antenna and label
Chip, the target of label antenna is the maximum electromagnetic energy turnover label chip of transmission, input impedance and mark when label chip
The maximum transmitted of power can be realized during the input impedance conjugation of label antenna.
When the input impedance change of label antenna, if label chip self-adapting tuning changes the input impedance of itself,
To match the maximum transmitted for realizing power with label antenna, RFID reader can read the input impedance of now electronic tag,
The input impedance of label antenna has also just been read indirectly.If a certain physical parameter and antenna feed impedance of antenna size are relative
Should, by the way that the change of respective antenna physical parameter can be read with upper type.This method can using RFID label antenna as
Sensor is used, and detects the physical parameter such as displacement or pressure.
For this applicable cases, it is necessary to which the input impedance of label antenna can be adjusted within the specific limits.In patent
【201310011465.2】In disclose a kind of impedance adjustable label antenna, the antenna includes a matching network, regulation matching
The input impedance of antenna can be adjusted when the height and width of network.But after label antenna is machined, matching network is not
It can adjust, therefore this method is the impedance regulation for the design phase, in actual use can not be real as needed
Existing impedance regulation；In patent【201310119010.2】In, dipole two-arm has certain angle in antenna, by adjust angle come
Realize it is impedance-tumed, this method realize antenna be two-dimensional structure.In patent【201520746791.2】In, matched using changing
The method of element realizes that impedance is adjusted, it is impossible to realize the real-time regulation of impedance.
Patent【201310119010.2】In impedance adjustable section label antenna although solve the back side and there is the dry of metal
Disturb, but still can be disturbed by front metal；In addition, this antenna realizes resistance by the way of one of dipole arm is folded
Anti- regulation, service life can be reduced in the occasion of extraneous constantly regulate antenna impedance；Moreover, as the antenna of bidimensional, not applying to
Used in the element of displacement, pressure sensor.
The information for being disclosed in the background section is merely intended to understanding of the increase to the general background of the present invention, without answering
When the prior art for being considered as recognizing or implying the information structure in any form well known to persons skilled in the art.
The content of the invention
In view of this, the technical problem to be solved in the present invention be how one kind is provided can be as displacement, pressure sensor
The label antenna used Deng element.
To solve above technical problem, the present invention provides a kind of impedance regulation label antenna in first aspect, and its feature exists
In, including：Metallic reflection bottom plate (1), antenna body (2), guide pole plate (3), insulated column (4) and fixing device (5) into, it is described
Pole plate (3) is guided into be connected with the antenna body (2) by the fixing device (5)；The metallic reflection bottom plate (1) with it is described
It is fixed by the insulated column (4) between antenna body (2).
In a kind of possible implementation, the antenna body (2) is by electric small loop antenna (21) and bending dipole
(22) constitute, the bending dipole (22) and the electric small loop antenna (21) are connected in close coupling mode；The electric small ring day
Distributing point (23) is distributed with line (21), the distributing point (23) is used to connect label chip.
In a kind of possible implementation, the distributing point (23) is without floating type distributing point.
In a kind of possible implementation, the pole plate (3) of guiding into guides pole plate into for pressure conversion.
In a kind of possible implementation, the pole plate (3) of guiding into guides pole plate into for displacement conversion.
In a kind of possible implementation, the fixing device (5) is spring, and the fixing device (5) is used to change
Guide the distance between pole plate (3) and described antenna body (2) into.
In a kind of possible implementation, the input impedance of the impedance regulation label antenna and the input of label chip
Impedance phase conjugate.
To solve above technical problem, the present invention provides a kind of electronic tag in second aspect, including label chip and
Above-mentioned impedance regulation label antenna.
A kind of impedance regulation antenna and electronic tag proposed by the present invention, employ metallic reflection bottom plate and guide pole plate into,
There is anti-metal interference, the radio frequency identification that can be used under metal environment.And by regulation guide into polar plate position come
Input impedance is adjusted, it is simple to operate understandable；What is more important, on the premise of without changing antenna body, improves label
The reliability used.
According to below with reference to the accompanying drawings becoming to detailed description of illustrative embodiments, further feature of the invention and aspect
It is clear.
Brief description of the drawings
Comprising in the description and constituting accompanying drawing and the specification of a part of specification and together illustrate the present invention's
Exemplary embodiment, feature and aspect, and for explaining the principle of the present invention.
Fig. 1 is the equivalent input impedance schematic diagram of label chip in the present invention；
Fig. 2 is the structural representation that middle impedance of the present invention adjusts label antenna；
Fig. 3 is the structural representation of antenna body (2) in the present invention；
Fig. 4 is guides relative distance and label antenna input impedance between pole plate (3), antenna body (2) into the present invention
Simulation result schematic diagram；
Fig. 5 for the present invention in guide relative distance and label chip capacitance readings between pole plate (3), antenna body (2) into
Graph of relation；
Fig. 6 is to guide into when distance be 30mm-65mm between pole plate (3) and antenna body (2) and electric capacity reading in the present invention
Linear fit graph of a relation between value.
Main Reference Numerals explanation：
1- metallic reflection bottom plates, 2- antenna bodies, 3- guides pole plate, 4- insulated columns, 5- fixing devices into；
21- electricity small loop antennas, 22- bending dipoles, 23- distributing points.
Embodiment
Below in conjunction with the accompanying drawings, the embodiment to the present invention is described in detail, it is to be understood that the guarantor of the present invention
Shield scope is not limited by embodiment.
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.Unless
Separately have it is other explicitly indicate that, otherwise in entire disclosure and claims, term " comprising " or its conversion such as "comprising" or
" including " etc. will be understood to comprise stated element or part, and not exclude other elements or other compositions
Part.
Special word " exemplary " is meant " being used as example, embodiment or illustrative " herein.Here as " exemplary "
Illustrated any embodiment should not necessarily be construed as preferred or advantageous over other embodiments.
In addition, in order to better illustrate the present invention, numerous details are given in embodiment below.
It will be appreciated by those skilled in the art that without some details, the present invention can equally be implemented.In some instances, for
Method well known to those skilled in the art, means, element are not described in detail, in order to highlight the purport of the present invention.
A kind of impedance regulation label antenna and electronic tag proposed by the present invention, are to change label to adapt to change in displacement
The certain scenarios of antenna impedance, and a kind of solution proposed, the present invention improve the antijamming capability of label antenna so that
The reliability of label antenna is high, and adjusting method is succinctly efficient.
A kind of impedance regulation label antenna that the present invention is provided, the excursion of its input impedance and adaptive label chip
Input impedance tuning range match, the change of change and the label antenna input impedance of the physical parameter of label antenna is one
One corresponding relation, the label antenna can be used as displacement, pressure sensor.
As shown in figure 1, for the equivalent input impedance schematic diagram of label chip, label chip can be equivalent to tunable capacitance
Cp and resistance Rp parallel connection, the excursion of tunable capacitance is 1.9pF~2.9pF, parallel resistance representative value 2073Ohm.And
The value for joining resistance is sufficiently large, can ignore.The input impedance of label antenna should be with label chip input impedance phase conjugate, therefore
The input impedance of label antenna is perception, and it, which inputs shunt inductance, can be equivalent to electric capacity, and its value takes negative, label antenna input electricity
The span of appearance is -2.9pF~-1.9pF.In the following description, it is explained in the form of equivalent capacity.
As shown in Fig. 2 adjusting the structural representation of label antenna for a kind of impedance that the present invention is provided, the label antenna is used
In ultrahigh frequency RFID wireless and passive pressure sensor, the label antenna includes：Metallic reflection bottom plate (1), antenna body (2),
Guide pole plate (3), insulated column (4) and fixing device (5) into, it is described to guide pole plate (3), the fixing device (5), the antenna into
Main body (2), the insulated column (4), the metallic reflection bottom plate (1) are according to being sequentially connected with from top to bottom；It is described to guide into
Pole plate (3) is connected by the fixing device (5) with the antenna body (2)；The metallic reflection bottom plate (1) and the antenna
It is fixed by the insulated column (4) between main body (2).
As shown in figure 3, being the structural representation of antenna body (2).Antenna body (2) is by electric small loop antenna (21) and bending
Dipole (22) is constituted, and bending dipole (22) and electric small loop antenna (21) are connected in close coupling mode.On electric small loop antenna
Distributing point (23) is without floating type distributing point, for connecting label chip.
It is director to guide pole plate (3) into, for guiding electric wave signal.Director can strengthen from a certain side to transmitting
Or the electric wave launched to the direction, in the present invention, director are realized in the form of metal polar plate, therefore it is referred to as guiding into
Pole plate.
When the relative position for guiding pole plate (3) and antenna body (2) into changes, the input impedance of label antenna can be sent out
Raw respective change, label chip can carry out self-adapting tuning and change the input impedance of itself, and label antenna carries out impedance
Match somebody with somebody.Pole plate (3) is guided into relative to antenna body (2), can be equivalent to carry out antenna body (2) end loading, end loading
The input impedance that can be understood as in antenna has been connected capacitor.Guide the change of pole plate (3) and antenna body (2) relative distance into
The size of end loading can be changed, so as to change the input impedance of antenna body (2).
Read write line reads the input impedance (can be equivalent to capacitance) of label chip, you can Extrapolation goes out to guide pole plate into
(3) change in location.Change as shown in fig. 6, taking and guiding distance between pole plate (3) and antenna body (2) between 30mm-65mm
When, the relation to capacitance readings and distance carries out linear fit, can obtain fitting formula：
C=-23.819h+266.67
Wherein, C is the capacitance (input impedance of label chip) read, and h is to guide pole plate (3) and antenna body (2) into
The distance between.
Due to the input impedance excursion of label chip be it is fixed, therefore, the change of the input impedance of label antenna
Scope matched must could realize required function.In order to realize the target, it is necessary in given input impedance scope
Interior tag design antenna, and the input impedance of antenna and guide the displacement corresponding relation of pole plate into and should meet monotonic function.
In a kind of possible implementation, the pole plate (3) of guiding into guides pole plate into for pressure conversion.
In a kind of possible implementation, the pole plate (3) of guiding into guides pole plate into for displacement conversion.Pressure or gravity are made
For guiding into during pole plate (3), make to guide pole plate (3) into and be subjected to displacement, so that the input impedance of label antenna changes, most
Realize that the label antenna can be used as the sensor of the physical parameters such as pressure, displacement eventually.
In a kind of possible implementation, the fixing device (5) is spring, and the fixing device (5) is used to change
Guide the distance between pole plate (3) and described antenna body (2) into.
In a kind of possible implementation, the input impedance of the impedance regulation label antenna and the input of label chip
Impedance phase conjugate.
The distance between pole plate (3) and main body antenna (2) are guided into by gravity or pressure change, label antenna can be caused
Input impedance changes.Using label antenna as sensor in use, guiding into relative between pole plate (3) and antenna body (2)
The excursion of position is 20mm~60mm, it will be understood by those skilled in the art that relative position excursion therebetween
Not limited to this.Antenna body (2) and guide into pole plate (3) at a distance of 40mm when, in 920MHz the input capacitance of label antenna be about-
2.5pF；The input capacitance of label antenna close -2.9pF during at a distance of 20mm；The input capacitance of label antenna connects during at a distance of 60mm
Closely -1.9pF.
According to above-mentioned described constraints, the distance between adjustment metallic reflection bottom plate (1) and antenna body (2) and
The physical parameter of antenna body (2), suitable scope is adjusted to by Electromagnetic Simulation, guide into pole plate (3), antenna body (2) it
Between relative distance and the simulation result of label antenna input impedance it is as shown in Figure 4.
By actual test, the electric capacity for the label chip that difference is guided under pole plate (3) position can be read by read write line,
As shown in Figure 5.In the range of 20mm~60mm, relative distance and label chip electricity between pole plate (3), antenna body (2) are guided into
The relation held between reading value is monotonic function.The position for guiding pole plate (3) into counter can be released by capacitance readings, because
This, the label antenna can be used as the core parts of displacement transducer or pressure sensor.
The invention also provides a kind of electronic tag, including label chip and above-described label antenna.
A kind of impedance regulation antenna and electronic tag proposed by the present invention, employ metallic reflection bottom plate and guide pole plate into,
There is anti-metal interference, the radio frequency identification that can be used under metal environment.And by regulation guide into polar plate position come
Input impedance is adjusted, it is simple to operate understandable；What is more important, on the premise of without changing antenna body, improves label
The reliability used.
It is foregoing to the present invention specific illustrative embodiment description be in order to illustrate and illustration purpose.These descriptions
It is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to above-mentioned teaching, can be much changed
And change.The purpose of selecting and describing the exemplary embodiment is that explaining that the certain principles and its reality of the present invention should
With so that those skilled in the art can realize and using the present invention a variety of exemplaries and
A variety of selections and change.The scope of the present invention is intended to be limited by claims and its equivalents.
Device embodiment described above is only schematical, wherein the unit illustrated as separating component can
To be or may not be physically separate, the part shown as unit can be or may not be physics list
Member, you can with positioned at a place, or can also be distributed on multiple NEs.It can be selected according to the actual needs
In some or all of module realize the purpose of this embodiment scheme.Those of ordinary skill in the art are not paying creativeness
Work in the case of, you can to understand and implement.
Claims (8)
1. a kind of impedance adjusts label antenna, it is characterised in that including：Metallic reflection bottom plate (1), antenna body (2), guide pole into
Plate (3), insulated column (4) and fixing device (5),
The pole plate (3) of guiding into is connected by the fixing device (5) with the antenna body (2)；
It is fixed by the insulated column (4) between the metallic reflection bottom plate (1) and the antenna body (2).
2. impedance according to claim 1 adjusts label antenna, it is characterised in that the antenna body (2) is by electric small ring
Antenna (21) and bending dipole (22) are constituted, and the bending dipole (22) and the electric small loop antenna (21) are with close coupling side
Formula is connected；
Distributing point (23) is distributed with the electric small loop antenna (21), the distributing point (23) is used to connect label chip.
3. impedance according to claim 2 adjusts label antenna, it is characterised in that the distributing point (23) is without floating type
Distributing point.
4. impedance according to claim 1 adjusts label antenna, it is characterised in that the pole plate (3) of guiding into turns for pressure
Change and guide pole plate into.
5. impedance according to claim 1 adjusts label antenna, it is characterised in that the pole plate (3) of guiding into turns for displacement
Change and guide pole plate into.
6. impedance according to claim 1 adjusts label antenna, it is characterised in that the fixing device (5) is spring, institute
State fixing device (5) and guide the distance between pole plate (3) and the antenna body (2) into for change.
7. impedance according to claim 6 adjusts label antenna, it is characterised in that the impedance adjusts the defeated of label antenna
Enter the input impedance phase conjugate of impedance and label chip.
8. a kind of electronic tag, it is characterised in that adjusted including the impedance described in label chip and claim 1-7 any one
Save label antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710436242.9A CN107092955A (en) | 2017-06-12 | 2017-06-12 | A kind of impedance regulation label antenna and electronic tag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710436242.9A CN107092955A (en) | 2017-06-12 | 2017-06-12 | A kind of impedance regulation label antenna and electronic tag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107092955A true CN107092955A (en) | 2017-08-25 |
Family
ID=59639431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710436242.9A Pending CN107092955A (en) | 2017-06-12 | 2017-06-12 | A kind of impedance regulation label antenna and electronic tag |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007089106A1 (en) * | 2006-02-01 | 2007-08-09 | Electronics And Telecommunications Research Institute | Antenna using proximity-coupling between radiation patch and short-ended feed line, rfid tag employing the same, and antenna impedance matching method thereof |
| CN103022649A (en) * | 2013-01-14 | 2013-04-03 | 北京邮电大学 | Impedance-adjustable tag antenna applied to UHF (ultrahigh frequency) RFID (radio-frequency identification) system |
| CN103208678A (en) * | 2013-04-03 | 2013-07-17 | 厦门信达物联科技有限公司 | Antenna, electronic tag and method for adjusting radiation direction of antenna and impedance |
| US20130265205A1 (en) * | 2010-11-12 | 2013-10-10 | Toda Kogyo Corporation | Folded dipole antenna and rf tag using the folded dipole antenna |
| CN103730714A (en) * | 2012-10-12 | 2014-04-16 | 刘智佳 | RFID label antenna |
| CN206833489U (en) * | 2017-06-12 | 2018-01-02 | 北京智芯微电子科技有限公司 | A kind of impedance regulation label antenna and electronic tag |
-
2017
- 2017-06-12 CN CN201710436242.9A patent/CN107092955A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007089106A1 (en) * | 2006-02-01 | 2007-08-09 | Electronics And Telecommunications Research Institute | Antenna using proximity-coupling between radiation patch and short-ended feed line, rfid tag employing the same, and antenna impedance matching method thereof |
| US20130265205A1 (en) * | 2010-11-12 | 2013-10-10 | Toda Kogyo Corporation | Folded dipole antenna and rf tag using the folded dipole antenna |
| CN103730714A (en) * | 2012-10-12 | 2014-04-16 | 刘智佳 | RFID label antenna |
| CN103022649A (en) * | 2013-01-14 | 2013-04-03 | 北京邮电大学 | Impedance-adjustable tag antenna applied to UHF (ultrahigh frequency) RFID (radio-frequency identification) system |
| CN103208678A (en) * | 2013-04-03 | 2013-07-17 | 厦门信达物联科技有限公司 | Antenna, electronic tag and method for adjusting radiation direction of antenna and impedance |
| CN206833489U (en) * | 2017-06-12 | 2018-01-02 | 北京智芯微电子科技有限公司 | A kind of impedance regulation label antenna and electronic tag |
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