CN105956649B - A kind of electronic license plate label antenna based on RFID - Google Patents
A kind of electronic license plate label antenna based on RFID Download PDFInfo
- Publication number
- CN105956649B CN105956649B CN201610244172.2A CN201610244172A CN105956649B CN 105956649 B CN105956649 B CN 105956649B CN 201610244172 A CN201610244172 A CN 201610244172A CN 105956649 B CN105956649 B CN 105956649B
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- China
- Prior art keywords
- license plate
- rfid
- medium strip
- strip
- medium
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Classifications
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- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Vehicle Waterproofing, Decoration, And Sanitation Devices (AREA)
- Details Of Aerials (AREA)
Abstract
The invention discloses a kind of electronic license plate label antenna based on RFID, including license plate ontology (1), medium strip (2) and RFID chip (3)；Medium strip (2) is fixed on the lower end surface of license plate ontology (1), and RFID chip (3) is fixed on medium strip (2)；The upper surface of the medium strip (2) is by conductive adhesive in the lower end surface upper left corner of license plate ontology (1)；The RFID chip (3) is welded in the front end face of medium strip；The upper surface of the medium strip (2) is provided with metallic copper band A, and the lower end surface of medium strip (2) is provided with metallic copper band B(6).The present invention provides one kind on the basis of keeping original physics license plate constant completely, does not destroy the structure of original license plate, a kind of novel electron license plate antenna for making full use of the metal electrical characteristics of license plate to allow license plate itself that RFID antenna is used as to radiate.
Description
Technical field
The present invention relates to a kind of electronic license plate label antenna based on RFID.
Background technique
Electronic license plate is a kind of application of subdivision, extension and the raising of technology of Internet of things；Its basic technique principle is benefit
With the identification of RFID high-precision, high precision acquisition, highly sensitive technical characterstic, one piece of electronic license plate mark is housed on the rolling stock
Label, using the RFID electronic label as the carrier of information of vehicles, and on the road by being equipped with authorized radio-frequency identification reader/writer
Duan Shi is acquired or is written to the data on the vehicle electric subtab, realizes a kind of elder generation of all vehicle digital managements
Into technology；Electronic license plate breaches the bottleneck of existing traffic information collection technology, can identify the exact identity information of vehicle；Cooperation
Backstage cloud computing is able to achieve classification, processing, inquiry, various social applications, backstage e-payment of vehicle traffic information etc.,
Vehicle registration management, traffic administration and vehicle toll management etc. are with a wide range of applications.
Frequency range used in RFID technology is mainly RFID UHF frequency range in electronic license plate at present, mostly uses working method
For the passive label chip of passive type, traditional electronic license plate antenna generally require placed on license plate outer surface label antenna or
The special processing license plate of person (cracks or special material makes license plate), not only influences beauty in this way, but also destroy the knot of original license plate
Structure, and since the metallic character of license plate, the reading distance and stability of label antenna are affected, it is unfavorable for electronic license plate
Popularization on the basis of original physics license plate.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide one kind to keep original physics license plate constant completely
On the basis of, the structure of original license plate is not destroyed, makes full use of the metal electrical characteristics of license plate that license plate itself is allowed to be used as RFID antenna
A kind of novel electron license plate antenna of radiation.
The purpose of the present invention is achieved through the following technical solutions: including license plate ontology, medium strip and RFID core
Piece；Medium strip is fixed on the lower end surface of license plate ontology, and RFID chip is fixed in medium strip.
The upper surface of the medium strip is by conductive adhesive in the lower end surface upper left corner of license plate ontology.
The extension end of the medium strip is 5mm at a distance from license plate ontology left side.
The RFID chip is welded in the front end face of medium strip.
The upper surface of the medium strip is provided with metallic copper band A, and the lower end surface of medium strip is provided with metallic copper band
B, metallic copper band A and metallic copper band B are electrically connected with RFID chip respectively.
The medium strip is Fr4 medium strip.
The RFID chip is Alien H4 chip.
The metallic copper band A includes contact portion and bending part, and bending part is L-shaped, the short side of bending part
It is connected with contact portion；Contact portion is also electrically connected with license plate ontology, and bending part is also electrically connected with RFID chip.
In this present invention, antenna includes physics license plate ontology, as the Fr4 medium strip of incentive structure and for storing letter
Cease the RFID chip (specially Alien H4 chip) of identification；Medium strip is hidden in the lower end surface of license plate, and medium plate uses 1
Millimeter Fr4 plate, as incentive structure, the RFID chip used is situated between for Alien H4 chip by design the copper strips on two sides
The structure of matter strip makes its port Impedance and chip impedance realize conjugate impedance match, defeated with maximum energy to reach antenna port
Enter, and is forming the surface current of Net long wave radiation in metal license plate surface actuator, and then realize that license plate itself is used as antenna to have
Effect radiation.
The beneficial effects of the present invention are: can keep the structure of original physics license plate constant completely, the processing is simple, and antenna is hidden
Beauty is covered, high gain, stability is high, is conducive to wideling popularize for electronic license plate.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of electronic license plate label antenna；
Fig. 2 is the top view of electronic license plate label antenna；
Fig. 3 is the side view of electronic license plate label antenna；
Fig. 4 is the upper end surface structure schematic diagram of medium strip；
Fig. 5 is the lower end surface structural schematic diagram of medium strip；
Fig. 6 is that figure is lost in the reflection coefficient of port of antenna chip；
The antenna gain patterns that azimuth is 45 degree when Fig. 7 is 915MHZ；
Azimuth is negative 60 degree of antenna gain patterns when Fig. 8 is 915MHZ；
In figure, 1- license plate ontology, 2- medium strip, 3-RFID chip, 4- contact portion, 5- bending part, 6- metallic copper
Band B.
Specific embodiment
Technical solution of the present invention is described in further detail with reference to the accompanying drawing, but protection scope of the present invention is not limited to
It is as described below.
As shown in Fig. 1 ~ 3, a kind of electronic license plate label antenna based on RFID, it is characterised in that: including license plate ontology 1,
Medium strip 2 and RFID chip 3；Medium strip 2 is fixed on the lower end surface of license plate ontology 1, and RFID chip 3 is fixed on medium strip
On 2.
The upper surface of the medium strip 2 is by conductive adhesive in the lower end surface upper left corner of license plate ontology 1.
The extension end of the medium strip 2 is 5mm at a distance from 1 left side of license plate ontology.
Further, medium strip 2 also can be set in the lower end surface lower left corner of license plate ontology 1, extension end and license plate
The distance of 1 left side of ontology is 5mm；
Further, medium strip 2 can also be set to the upper right corner or the lower right corner of 1 lower end surface of license plate ontology, stretch out
End is 5mm at a distance from 1 right side of license plate ontology；
The RFID chip 3 is welded in the front end face of medium strip.
As shown in figure 4, the upper surface of the medium strip 2 is provided with metallic copper band A, as shown in figure 5, medium strip 2
Lower end surface be provided with metallic copper band B6, metallic copper band A and metallic copper band B6 be electrically connected with RFID chip 3.
The medium strip 2 is Fr4 medium strip.
The RFID chip is Alien H4 chip.
The metallic copper band A includes contact portion 4 and bending part 5；Bending part 5 is L-shaped, bending part 5
Short side is connected with contact portion 4；Contact portion 4 is also electrically connected with license plate ontology 1, and bending part 5 is also electrically connected with RFID chip 3
It connects.
Further, contact portion 4 is generally arranged wider, so that medium strip 2 and license plate ontology electricity basis are good；
The effect of bending part 5 is cooperated with metallic copper band B6, impedance matching is carried out with RFID chip to realize, to reach
There is maximum energy input to antenna port, and form the surface current of Net long wave radiation in metal license plate surface actuator.
It is possible to further be adapted to by designing or adjusting width of the metallic copper with B6 to form different impedances
Different antennas.
In the present invention, antenna includes physics license plate ontology, as the Fr4 medium strip of incentive structure and for storing information
The RFID chip (specially Alien H4 chip) of identification；Medium strip is hidden in the lower end surface of license plate ontology；
By Fig. 1, it is known that, in the structural schematic diagram of the application, license plate ontology is horizontal positioned, actually uses process license plate sheet
Body needs to install perpendicular to horizontal plane, and after installing, signified upper surface is the front surface of license plate, the application in fact in the application
Signified lower end surface is actually the rear surface of license plate, therefore medium strip can be hidden in license plate ontology in actual use
Rear surface, to keep the structure of original physics license plate constant completely, the processing is simple, and antenna concealing is beautiful.
Medium plate uses 1 millimeter of Fr4 plate, the copper strips on two sides as incentive structure, the RFID chip that uses for
Alien H4 chip, the structure by designing medium strip makes its port Impedance and chip impedance realize conjugate impedance match, to reach
Antenna port has maximum energy input, and in the surface current for forming Net long wave radiation in metal license plate surface actuator, in turn
Realize that license plate itself is used as antenna to carry out Net long wave radiation, high gain, stability is high, is conducive to wideling popularize for electronic license plate.
In invention, as shown in Fig. 1 ~ 3, the method for the electronic license plate label antenna based on RFID the following steps are included:
S1. select 1mm thickness aluminium sheet, 92 existing formula automotive number plate state dimensionings of 440 × 140mm(are made) license plate
Ontology 1；
S2. select the FR4 plate of 1mm thickness that medium strip 2 is made；
S3. it selects Alien H4 chip as RFID chip, and is welded to the front end face of medium strip 2；
S4. in 2 upper surface of medium strip setting metallic copper band A4；In the lower end surface of medium strip 2 setting metallic copper band B5
S5. copper strips is set in the lower end surface of medium strip 2, welds Alien H4 chip in the left side of medium strip 2, it should
Chip impedance is 18-j*180 ohm in 915MHZ；
S6. by conducting resinl or the license plate back side is welded and fixed in medium strip 2, stretches out license plate left side 5mm or so.
It, can be with from figure as shown in fig. 6, for the return loss schematic diagram at the obtained antenna chip port of present invention test
See that exit port matches well with chip impedance, -10dB bandwidth is 850MHz to 950MHz, is covered with sufficiently wide bandwidth.
As shown in Fig. 7 ~ 8, indicate frequency when be 915MHZ antenna at 45 degree and 60 degree minus (indicate azimuth for 0 with the face XOZ
The plane of degree, counterclockwise rotation be positive, be negative clockwise, license plate method is Z-direction in outward direction) gain pattern,
The maximum gain in entire space can reach 4dBi or so, and reading/writing distance is up to ten meters or more；Its beam position is placed exactly in license plate
Reader can be placed in the right side top position in roadside in electronic license plate identifying system to realize electricity by right side updip direction
Communication between sub- license plate and reader, therefore above-mentioned directional diagram can satisfy the needs of practical application, meet electronic license plate
Application scenarios.
Claims (8)
1. a kind of electronic license plate label antenna based on RFID, it is characterised in that: including license plate ontology (1), medium strip (2) and
RFID chip (3)；Medium strip (2) is fixed on the lower end surface of license plate ontology (1), and RFID chip (3) is fixed on medium strip (2)
On, medium strip (2) is used as intermediary device, and license plate ontology (1) is made to be turned into " antenna " of RFID chip (3).
2. a kind of electronic license plate label antenna based on RFID according to claim 1, it is characterised in that: the medium
The upper surface of strip (2) is by conductive adhesive in the lower end surface upper left corner of license plate ontology (1).
3. a kind of electronic license plate label antenna based on RFID according to claim 1, it is characterised in that: the medium
The extension end of strip (2) is 5mm at a distance from license plate ontology (1) left side.
4. a kind of electronic license plate label antenna based on RFID according to claim 1, it is characterised in that: the RFID
Chip (3) is welded in the front end face of medium strip (2).
5. a kind of electronic license plate label antenna based on RFID according to claim 1, it is characterised in that: the medium
The upper surface of strip (2) is provided with metallic copper band A, and the lower end surface of medium strip (2) is provided with metallic copper band B (6), metallic copper band
A and metallic copper band B (6) are electrically connected with RFID chip (3).
6. a kind of electronic license plate label antenna based on RFID according to claim 1, it is characterised in that: the medium
Strip (2) is Fr4 medium strip.
7. a kind of electronic license plate label antenna based on RFID according to claim 1, it is characterised in that: the RFID
Chip (3) is Alien H4 chip.
8. a kind of electronic license plate label antenna based on RFID according to claim 5, it is characterised in that: the metal
Copper strips A includes contact portion (4) and bending part (5), and bending part (5) is L-shaped, the short side of bending part (5) with contact
Partially (4) are connected；Contact portion (4) is also electrically connected with license plate ontology (1), and bending part (5) is also electrically connected with RFID chip (3)
It connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610244172.2A CN105956649B (en) | 2016-04-19 | 2016-04-19 | A kind of electronic license plate label antenna based on RFID |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610244172.2A CN105956649B (en) | 2016-04-19 | 2016-04-19 | A kind of electronic license plate label antenna based on RFID |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105956649A CN105956649A (en) | 2016-09-21 |
| CN105956649B true CN105956649B (en) | 2019-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610244172.2A Active CN105956649B (en) | 2016-04-19 | 2016-04-19 | A kind of electronic license plate label antenna based on RFID |
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| CN (1) | CN105956649B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109598325A (en) * | 2018-12-29 | 2019-04-09 | 厦门英诺尔电子科技股份有限公司 | A kind of RFID label tag Anti-dismounting structure for license plate |
| WO2021109985A1 (en) * | 2019-12-04 | 2021-06-10 | 上海一芯智能科技有限公司 | Registration plate electronic tag |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466364A (en) * | 2014-12-19 | 2015-03-25 | 周祥 | Electronic license plate antenna based on RFID |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008131244A1 (en) * | 2007-04-18 | 2008-10-30 | 3M Innovative Properties Company | Radio frequency identification functionality coupled to electrically conductive signage |
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- 2016-04-19 CN CN201610244172.2A patent/CN105956649B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466364A (en) * | 2014-12-19 | 2015-03-25 | 周祥 | Electronic license plate antenna based on RFID |
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| CN105956649A (en) | 2016-09-21 |
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