CN112801258A - RFID electronic tag - Google Patents
RFID electronic tag Download PDFInfo
- Publication number
- CN112801258A CN112801258A CN202110259842.9A CN202110259842A CN112801258A CN 112801258 A CN112801258 A CN 112801258A CN 202110259842 A CN202110259842 A CN 202110259842A CN 112801258 A CN112801258 A CN 112801258A
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- CN
- China
- Prior art keywords
- metal plate
- tag
- plate
- circuit board
- metal
- 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
-
- 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
-
- 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
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
The invention provides an RFID electronic tag, comprising: a first metal plate; a dielectric plate fixed to the first metal plate; a second metal plate fixed on the dielectric plate; and the circuit board is fixed between the dielectric plate and the second metal plate, a tag antenna and a tag chip are arranged on the circuit board, the second metal plate is electrically connected with the circuit board, and the tag chip is electrically connected with the tag antenna and the second metal plate through the circuit board. Based on this, the tag chip can radiate the wireless electromagnetic wave outwards through the tag antenna and the second metal plate, that is, the second metal plate is used as a radiator of the tag antenna, so that the radiation area and the radiation intensity of the wireless electromagnetic wave can be improved, and in addition, the first metal plate is used as a reflector of the tag antenna, so that the back lobe level of the tag antenna can be reflected and superposed to the front face, so that the gain of the tag antenna can be further improved, and the radiation intensity of the wireless electromagnetic wave can be further improved.
Description
Technical Field
The invention relates to the technical field of radio frequency identification, in particular to an RFID electronic tag.
Background
RFID (Radio Frequency Identification), also called RFID, is a communication technology that can read information stored in devices such as electronic tags or write information into devices such as electronic tags by Radio electromagnetic wave signals, and can realize non-visual reading and storage without physical contact or optical contact.
The electronic tag has a world unique electronic code, when the electronic tag is fixed on a marked object, the marked object can be uniquely determined, the information in the electronic tag is read through the RFID technology, and the information of the marked object can be obtained, so that each object can be accurately managed in a plurality of managed objects, and the phenomena of error memory or error memory and the like cannot occur.
However, in some application scenarios, the radio-frequency electromagnetic waves radiated by the electronic tag may be absorbed by conductors in the environment, so that the radiation intensity of the electronic tag is reduced, and the accuracy of information identification in the electronic tag is affected.
Disclosure of Invention
In view of the above, the present invention provides an RFID tag to improve the radiation intensity of the radio frequency electromagnetic wave in the RFID tag.
In order to achieve the purpose, the invention provides the following technical scheme:
an RFID electronic tag comprising:
a first metal plate;
a dielectric plate fixed to the first metal plate;
a second metal plate fixed to the dielectric plate;
the circuit board is fixed between the dielectric plate and the second metal plate, a tag antenna and a tag chip are arranged on the circuit board, the second metal plate is electrically connected with the circuit board, and the tag chip is electrically connected with the tag antenna and the second metal plate through the circuit board;
the second metal plate is a radiator of the tag antenna, and the first metal plate is a reflector of the tag antenna.
Optionally, the dielectric plate comprises at least two regions; at least two second metal plates are fixed on the medium plate, and different second metal plates are positioned in different areas; the circuit board is fixed between one of the second metal plates and the dielectric plate.
Optionally, each region of the dielectric plate has a groove, the second metal plate in the region is located in the groove, and the adjacent second metal plates are insulated by the dielectric plate between the adjacent grooves.
Optionally, the dielectric plate includes a plurality of strip-shaped protrusions, and the strip-shaped protrusions are located between two adjacent regions;
and the second metal plates in the two adjacent areas are insulated by the strip-shaped bulges.
Alternatively, the material of the metal plate includes stainless steel and copper-plated ternary alloy;
the material of the dielectric plate comprises PC.
Optionally, the tag antenna is a microstrip line structure.
Optionally, the thickness of the tag antenna is less than 1 mm;
the thickness of the metal plate is less than or equal to 2 mm.
Optionally, the RFID electronic tag further includes a potting adhesive or an adhesive tape for sealing the electronic tag.
Optionally, the RFID tag further includes a screw or a rivet for fixing the first metal plate, the dielectric plate, the second metal plate, and the circuit board.
Optionally, the surface of the second metal plate has an information identifier, and the information identifier includes a two-dimensional code.
Compared with the prior art, the technical scheme provided by the invention has the following advantages:
the RFID electronic tag comprises a first metal plate, a dielectric plate, a circuit board and a second metal plate, wherein a tag antenna and a tag chip are arranged on the circuit board, the second metal plate is electrically connected with the circuit board, and the tag chip is electrically connected with the tag antenna and the second metal plate through the circuit board.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic view of a split structure of an RFID electronic tag according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a dielectric plate and a second metal plate according to an embodiment of the present invention;
fig. 3 is a schematic front structural view of a dielectric plate according to an embodiment of the present invention;
fig. 4 is a schematic front view of a dielectric plate according to another embodiment of the present invention;
fig. 5 is a schematic front view of a dielectric plate according to another embodiment of the present invention;
FIG. 6 is a schematic diagram of a back structure of the dielectric plate shown in FIG. 5;
fig. 7 is a schematic structural diagram of three second metal plates fixed on a dielectric plate according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, so that the above is the core idea of the present invention, and the above objects, features and advantages of the present invention can be more clearly understood. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides an RFID electronic tag which is an ultrahigh frequency passive electronic identification product and can be used for checking and various management of metal tag products.
As shown in fig. 1, the RFID tag includes:
a first metal plate 10;
a dielectric sheet 20 fixed to the first metal sheet 10;
a second metal plate 30 fixed to the dielectric plate 20;
a circuit board 40 fixed between the dielectric plate 20 and the second metal plate 30, the circuit board 40 having a tag antenna 401 and a tag chip 402, the second metal plate 30 electrically connected to the circuit board 40, the tag chip 402 electrically connected to the tag antenna 401 and the second metal plate 30 through the circuit board 40;
the second metal plate 30 is a radiator of the tag antenna 401, and the first metal plate 10 is a reflector of the tag antenna 401.
Based on this, the tag chip 402 can radiate the electromagnetic wave outwards through the tag antenna 401 and the second metal plate 30, that is, the second metal plate 30 serves as a radiator of the tag antenna 401, and can increase the radiation area and radiation intensity of the electromagnetic wave, and in addition, the first metal plate 10 serves as a reflector of the tag antenna 401 and can reflect and superimpose the back lobe level of the tag antenna 401 onto the front surface, so that the gain of the tag antenna 401 can be further increased, and the radiation intensity of the electromagnetic wave can be further increased.
In some embodiments of the present invention, as shown in fig. 2, the dielectric sheet 20 includes at least two regions a. At least two second metal plates 30 are fixed on the dielectric plate 20, and different second metal plates 30 are located in different areas a. The circuit board 40 is fixed between a second metal plate 30 and the dielectric plate 20.
It should be noted that the area of the circuit board 40 is fixed, and when the area of the required RFID electronic tag is not much different from the area of the circuit board 40, the dielectric plate 20 may have only one area a, that is, only one second metal plate 30 is fixed on the dielectric plate 20, and the area of the second metal plate 30 is substantially the same as the area of the RFID electronic tag.
However, when the area of the required RFID tag is different from the area of the circuit board 40, in order to avoid the difference between the area of the second metal plate 30 and the area of the circuit board 40 being large, which results in the poor uniformity of the wireless electromagnetic wave radiated from the second metal plate 30, the dielectric plate 20 is divided into a plurality of areas a, and different second metal plates 30 are disposed in different areas a, and the second metal plates 30 in different areas a are insulated from each other.
It should be noted that, in other embodiments of the present invention, the second metal plate 30 of the area a without the circuit board 40 may be replaced by a plastic plate with lower cost, so long as the surface of the electronic tag is flat.
On the basis of the above embodiments, in some embodiments of the present invention, as shown in fig. 3, each region a of the dielectric plate 20 has a groove 201, the second metal plate 30 in the region a is located in the groove 201, and the adjacent second metal plates 30 are insulated by the dielectric plate between the adjacent grooves 201. It should be noted that, after the second metal plate 30 is fixed inside the groove 201, the surface of the second metal plate 30 may be flush with the top of the groove 201, or slightly lower or higher than the top of the groove 201, so as to ensure the smoothness of the surface of the electronic tag.
Of course, the present invention is not limited thereto, and in other embodiments, as shown in fig. 4, the dielectric plate 20 includes a plurality of bar-shaped protrusions 202, and the bar-shaped protrusions 202 are located between two adjacent regions a, that is, between any two adjacent regions a, the bar-shaped protrusions 202 are located, so that the bar-shaped protrusions 202 are located between any two second metal plates 30, so that the second metal plates 30 in any two adjacent regions a are insulated by the bar-shaped protrusions 202.
In other embodiments of the present invention, the adjacent second metal plates 30 may not be insulated by the dielectric plate 20, that is, may be insulated by an insulating paste or the like formed between the adjacent second metal plates 30.
In some embodiments of the present invention, the material of the metal plates includes stainless steel with corrosion resistance and high compressive strength, and copper-plated ternary alloy, i.e. the material of the first metal plate 10 and the second metal plate 30 includes stainless steel, copper-plated ternary alloy, etc., wherein the stainless steel may be 304 stainless steel; the material of the dielectric plate 20 includes PC (Polycarbonate), but may also include other materials with small dielectric loss, wide temperature range, good weather resistance, and expansion coefficient close to that of metal; the material of the tag antenna 401 includes metal; the circuit board 40 includes a rigid circuit board such as an epoxy board (FR4) or ceramics, and a flexible circuit board such as an FPC. Among them, the circuit board 40 mainly functions as impedance matching.
In addition to any of the embodiments, in some embodiments of the invention, the thickness of the tag antenna 401 is less than 1 mm; the thickness of the metal plate is less than or equal to 2mm, that is, the thickness of the first metal plate 10 and the second metal plate 30 is less than or equal to 2mm, for example, the first metal plate 10 and the second metal plate 30 are copper-plated ternary alloys with the thickness of less than or equal to 2 mm. Of course, the invention is not limited thereto, and in other embodiments, the thicknesses of the tag antenna 401 and the metal plate may be set according to actual needs. It should be noted that, in some embodiments of the present invention, the overall thickness of the electronic tag is not less than 5mm, so that the electronic tag has a certain thickness and hardness, and is not easily damaged.
It should be noted that, on the basis of any embodiment, in some embodiments of the present invention, the RFID electronic tag further includes a potting adhesive or an adhesive tape for sealing the electronic tag. That is, in some embodiments of the present invention, each part of the label may be sealed by using a potting adhesive with a small dielectric constant and good fluidity, or may be sealed by using an adhesive tape. That is to say, the potting adhesive or the adhesive tape may be located on the front and back surfaces of the RFID electronic tag, or between layers of the RFID electronic tag, such as between the dielectric plate 20 and the second metal plate 30, so as to seal the circuit board 40, the tag antenna 401, the tag chip 402, and the like between the first metal plate 10 and the second metal plate 30, thereby playing roles of water resistance, moisture resistance, dust resistance, and pressure resistance, and ensuring the stability of the performance of the electronic tag.
On the basis of any embodiment, in some embodiments of the present invention, the tag antenna 401 is a microstrip line structure, so as to improve the radiation performance of the tag antenna 401, and make the electronic tag suitable for being applied to a device whose surface is metal.
On the basis of any embodiment, in some embodiments of the present invention, the RFID electronic tag further includes a screw or a rivet, etc. for fixing the first metal plate 10, the dielectric plate 20, the second metal plate 30, and the circuit board 40. As shown in fig. 5 and fig. 6, fig. 5 is a schematic front top view of a dielectric plate 20 according to some embodiments of the present invention, and fig. 6 is a schematic back top view of the dielectric plate 20 shown in fig. 5, wherein the dielectric plate 20 has first circular holes 203 at four corners for inserting screws or rivets for fixing. As shown in fig. 7, the second metal plate 30 also has a second circular hole 301, and the second circular hole 301 corresponds to the first circular hole 203 in position so as to be fixed by inserting the same screw or rivet.
It should be noted that the second metal plate 30 further has a circular area 302, and the circular area 302 is used for realizing the welding between the second metal plate 30 and the circuit board 40, of course, the invention is not limited thereto, in other embodiments, the circular hole may also be a square or polygonal hole, and the circular area may also be a square area or a polygonal area, and the details are not repeated herein.
On the basis of any embodiment, in some embodiments of the present invention, the surface of the second metal plate 30 has an information identifier, and the information identifier includes a two-dimensional code or the like. The information marks such as the two-dimensional code can also be made on the surface of the second metal plate 30 in a laser mode. The information mark may be formed on the surface of the second metal plate 30 provided corresponding to the circuit board 40, or may be formed on the surface of another second metal plate 30.
In the embodiment of the present invention, the front surface refers to a surface facing a manager after the RFID tag is fixed, and the back surface refers to a surface facing a person to be identified. In the embodiment of the invention, the RFID electronic tag can be arranged on the surface of a person to be identified by adopting an adhesive-backed mounting mode, a front-side rivet or screw mounting mode, a rear screw post mounting mode and a back nut mounting mode.
The RFID electronic tag provided by the embodiment of the invention has the advantages that the storage space can store the codes and related information of the assets, non-visual reading and storage can be realized by using electromagnetic waves through special reading and writing equipment, and the cost of operators in the asset management process is greatly reduced. In addition, the electronic tag provided by the embodiment of the invention can be applied to the surface of a product made of a metal material, and the farthest reading distance is not less than 10m according to the size of the electronic tag. And secondly, the electronic tag is a hard anti-metal tag, and is designed by adopting a microstrip line antenna scheme, so that the electronic tag is suitable for equipment on the metal surface. And the electronic tag is sealed between the metal plates, so that the electronic tag can be waterproof, moistureproof, dustproof and pressure-proof, and has stable performance.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An RFID electronic tag, comprising:
a first metal plate;
a dielectric plate fixed to the first metal plate;
a second metal plate fixed to the dielectric plate;
the circuit board is fixed between the dielectric plate and the second metal plate, a tag antenna and a tag chip are arranged on the circuit board, the second metal plate is electrically connected with the circuit board, and the tag chip is electrically connected with the tag antenna and the second metal plate through the circuit board;
the second metal plate is a radiator of the tag antenna, and the first metal plate is a reflector of the tag antenna.
2. The RFID tag of claim 1, wherein the dielectric sheet comprises at least two regions; at least two second metal plates are fixed on the medium plate, and different second metal plates are positioned in different areas; the circuit board is fixed between one of the second metal plates and the dielectric plate.
3. The RFID tag of claim 2, wherein each area of the dielectric sheet has a recess, the second metal sheet in the area is located in the recess, and adjacent second metal sheets are insulated by the dielectric sheet between adjacent recesses.
4. The RFID tag of claim 2, wherein the dielectric plate comprises a plurality of strip-shaped protrusions, and the strip-shaped protrusions are located between two adjacent areas;
and the second metal plates in the two adjacent areas are insulated by the strip-shaped bulges.
5. The RFID tag of claim 1, wherein the material of the metal plate comprises stainless steel and copper plated ternary alloy;
the material of the dielectric plate comprises PC.
6. The RFID tag of claim 1, wherein the tag antenna is a microstrip line structure.
7. The RFID tag of claim 1, wherein the tag antenna is less than 1mm thick;
the thickness of the metal plate is less than or equal to 2 mm.
8. The RFID tag of claim 1, further comprising a potting adhesive or tape that seals the tag.
9. The RFID tag of claim 1, further comprising a screw or rivet for fixing the first metal plate, the dielectric plate, the second metal plate, and the circuit board.
10. The RFID tag of claim 1, wherein the surface of the second metal plate has an information mark, and the information mark comprises a two-dimensional code.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110259842.9A CN112801258A (en) | 2021-03-10 | 2021-03-10 | RFID electronic tag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110259842.9A CN112801258A (en) | 2021-03-10 | 2021-03-10 | RFID electronic tag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112801258A true CN112801258A (en) | 2021-05-14 |
Family
ID=75815497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110259842.9A Pending CN112801258A (en) | 2021-03-10 | 2021-03-10 | RFID electronic tag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112801258A (en) |
-
2021
- 2021-03-10 CN CN202110259842.9A patent/CN112801258A/en active Pending
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