CN215068307U - Double-frequency anti-metal electronic tag - Google Patents
Double-frequency anti-metal electronic tag Download PDFInfo
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- CN215068307U CN215068307U CN202120504772.4U CN202120504772U CN215068307U CN 215068307 U CN215068307 U CN 215068307U CN 202120504772 U CN202120504772 U CN 202120504772U CN 215068307 U CN215068307 U CN 215068307U
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Abstract
The utility model provides a dual-frenquency anti metal electronic tags, including high frequency antenna, hyperfrequency antenna, chip and possessing the anti metal substrate of anti metallic property, the hyperfrequency antenna sets up two sides about the base plate, sets up the antenna coil of horizontal spiral with the high frequency antenna, makes the magnetic field direction of high frequency antenna different with the magnetic field direction of hyperfrequency antenna, thereby makes the utility model discloses a dual-frenquency anti metal tags has the performance that multi-direction was read and can adapt to metallic environment.
Description
Technical Field
The utility model relates to a radio frequency identification field especially relates to anti metal electronic tags of dual-frenquency.
Background
In the technical field of RFID, the working frequency band of a high-frequency antenna is generally 13.56MHz, the working frequency band of an ultrahigh-frequency antenna is generally 860MHz to 960MHz, electronic tags in different frequency bands have different functional characteristics, the high-frequency electronic tags are generally applied to anti-counterfeiting tracing, and the ultrahigh frequency is applied to asset management, production line management, supply chain management, warehousing management, vehicle management and the like. An electronic tag with two frequency band antennas is called a dual-frequency electronic tag, and can have the functions of the two frequency band antennas. For example, the dual-frequency electronic tag is applied to the retail industry, and can help a merchant to quickly check and collect data of goods while achieving anti-theft.
Because the radio frequency signal is an electromagnetic signal, and the metal has the adsorption and reflection effects on the electromagnetic signal, the common electronic tag cannot be attached to the surface of the metal for use. The anti-metal working principle of the existing anti-metal electronic tag mainly depends on a medium isolated from metal (the distance between the metal surface and a tag antenna is increased), and meanwhile, the metal is used as a reflecting surface, so that the characteristic of the tag on the metal is improved. The existing dual-frequency electronic tags are mostly provided with high-frequency antennas and ultrahigh-frequency antennas on the same plane on the upper plane and the lower plane of a substrate, and anti-metal dual-frequency electronic tags are also provided with two frequency antennas on an anti-metal medium, so that the tags have the problems of single reading direction and small range.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the dual-frequency anti-metal electronic tag is provided to solve the problems that the existing dual-frequency anti-metal electronic tag is single in reading direction and small in range.
In order to solve the technical problem, the utility model discloses a technical scheme be:
the dual-frequency anti-metal electronic tag comprises a chip, a high-frequency antenna, an ultrahigh-frequency antenna and an anti-metal substrate, wherein the ultrahigh-frequency antenna is arranged on two opposite surfaces of the anti-metal substrate and the two surfaces are electrically connected through a through hole of the substrate;
the high-frequency antenna is arranged on the anti-metal substrate and is provided with a gap with the ultrahigh-frequency antenna, the high-frequency antenna comprises a three-dimensional spiral part, and the spiral cross section of the spiral part is intersected with any plane of the ultrahigh-frequency antenna;
the high-frequency antenna and the ultrahigh-frequency antenna are electrically connected with the chip respectively.
Furthermore, the high-frequency antenna is arranged on the anti-metal substrate of the middle area surrounded by the ultrahigh-frequency antenna, and the cross section of the high-frequency antenna is perpendicular to the surface of the ultrahigh-frequency antenna.
Further, the metal-resistant substrate is a PCB metal-resistant substrate, a ceramic metal-resistant substrate or an ABS metal-resistant substrate.
Furthermore, the chip is arranged on any surface where the ultrahigh frequency antenna is located.
Furthermore, the high-frequency antenna also comprises a coplanar part, wherein the coplanar part comprises two coplanar antennas, the coplanar part is positioned on the surface of the chip on the anti-metal substrate, one ends of the two coplanar antennas are electrically connected with the chip, the spiral part forms a spiral circuit of the high-frequency antenna, and the two led-out ends of the spiral part are respectively electrically connected with the other ends of the two coplanar antennas.
Further, the cross section of the spiral part is rectangular.
Furthermore, the antennas of the spiral part pass through two surfaces where the ultrahigh frequency antennas are located respectively.
Furthermore, two groups of through holes which correspond to each other are arranged in the middle area of the anti-metal substrate close to the two opposite edges, and the antennas of the spiral part sequentially pass through the corresponding through holes and are not intersected with each other on the surface of the same anti-metal substrate.
Furthermore, the chip is arranged between the two ends of the ultrahigh frequency antenna, and the two coplanar antennas are arranged between the ultrahigh frequency antenna and the spiral part on the side where the chip is located.
Furthermore, the chip is a dual-frequency chip, the chip comprises at least four antenna pins, and two ends of the high-frequency antenna and two ends of the ultrahigh-frequency antenna are respectively and correspondingly electrically connected with the four antenna pins of the chip one by one; or the chip is a double-chip group consisting of a high-frequency chip and an ultrahigh-frequency chip, the high-frequency chip and the ultrahigh-frequency chip both comprise at least two antenna pins, two ends of the high-frequency antenna are electrically connected with the two antenna pins of the high-frequency antenna, and two ends of the ultrahigh-frequency antenna are electrically connected with the two antenna pins of the ultrahigh-frequency chip.
The beneficial effects of the utility model reside in that: the utility model provides an anti metal electronic tags of dual-frenquency uses the anti metal substrate who has anti metal effect, the circuit trend design of high frequency antenna is the crossing trend of heliciform and cross-section and hyperfrequency antenna place face, according to lenz's law, the magnetic field of high frequency antenna changes into the magnetic field with hyperfrequency antenna magnetic field equidirectional not, and then make the electronic tags reader also can read dual-frenquency electronic tags in the direction that the hyperfrequency reads outside the direction, the performance that has multi-direction reading of dual-frenquency anti metal electronic tags has been realized and the metal environment is adapted to.
Drawings
Fig. 1 is a front structure view of a dual-frequency anti-metal electronic tag according to a first embodiment of the present invention;
fig. 2 is a back structure view of a dual-frequency anti-metal electronic tag according to a first embodiment of the present invention;
fig. 3 is a cross-sectional view of a side a of a dual-frequency anti-metal electronic tag according to a first embodiment of the present invention;
fig. 4 is a cross-sectional view of a side B of a dual-frequency anti-metal electronic tag according to a first embodiment of the present invention;
fig. 5 is a front structure view of a dual-frequency anti-metal electronic tag according to an embodiment of the present invention;
fig. 6 is a back structure view of a dual-frequency anti-metal electronic tag according to an embodiment of the present invention.
Description of reference numerals:
1. a high-frequency antenna; 11. a coplanar portion; 12. a helical portion; 2. an ultra-high frequency antenna; 3. a dual-frequency chip; 4. a PCB anti-metal substrate; 5. and a via hole.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1 to 6, the dual-frequency anti-metal electronic tag includes a chip, a high-frequency antenna, an ultra-high frequency antenna and an anti-metal substrate, wherein the ultra-high frequency antenna is disposed on two opposite sides of the anti-metal substrate and the two sides are electrically connected through a via hole of the substrate;
the high-frequency antenna is arranged on the anti-metal substrate and is provided with a gap with the ultrahigh-frequency antenna, the high-frequency antenna comprises a three-dimensional spiral part, and the spiral cross section of the spiral part is intersected with any plane of the ultrahigh-frequency antenna;
the high-frequency antenna and the ultrahigh-frequency antenna are electrically connected with the chip respectively.
From the above description, the beneficial effects of the present invention are: the utility model provides an anti metal electronic tags of dual-frenquency uses the anti metal substrate who has anti metal effect, the circuit trend design of high frequency antenna is the crossing trend of heliciform and cross-section and hyperfrequency antenna place face, according to lenz's law, the magnetic field of high frequency antenna then changes into the magnetic field with hyperfrequency antenna magnetic field equidirectional not, and then make the electronic tags reader also can read dual-frenquency electronic tags in the direction that the hyperfrequency reads outside the direction, the performance that has multi-direction reading of dual-frenquency anti metal electronic tags has been realized and the metal environment is adapted to.
Furthermore, the high-frequency antenna is arranged on the anti-metal substrate of the middle area surrounded by the ultrahigh-frequency antenna, and the cross section of the high-frequency antenna is perpendicular to the surface of the ultrahigh-frequency antenna.
As can be seen from the above description, the high frequency antenna is disposed in the middle region of the uhf antenna, so that the volume of the electronic tag is small, and the reading angle range is maximum when the cross section is vertical.
Further, the metal-resistant substrate is a PCB metal-resistant substrate, a ceramic metal-resistant substrate or an ABS metal-resistant substrate.
From the above description, the PCB anti-metal substrate, the ceramic anti-metal substrate and the ABS anti-metal substrate have excellent electrical properties and high dielectric constants.
Furthermore, the chip is arranged on any surface where the ultrahigh frequency antenna is located.
Furthermore, the high-frequency antenna also comprises a coplanar part, wherein the coplanar part comprises two coplanar antennas, the coplanar part is positioned on the surface of the chip on the anti-metal substrate, one ends of the two coplanar antennas are electrically connected with the chip, the spiral part forms a spiral circuit of the high-frequency antenna, and the two led-out ends of the spiral part are respectively electrically connected with the other ends of the two coplanar antennas.
According to the description, the chip is arranged on any surface where the ultrahigh-frequency antenna on the surface of the anti-metal substrate is located, the high-frequency antenna is correspondingly arranged, the antenna layout is reasonable, and the chip size is small.
Further, the cross section of the spiral part is rectangular.
Furthermore, the antennas of the spiral part pass through two surfaces where the ultrahigh frequency antennas are located respectively.
Furthermore, two groups of through holes which correspond to each other are arranged in the middle area of the anti-metal substrate close to the two opposite edges, and the antennas of the spiral part sequentially pass through the corresponding through holes and are not intersected with each other on the surface of the same anti-metal substrate.
As is apparent from the above description, the high-frequency antenna wire is realized in the simplest manner by designing the spiral portion to be a spiral structure having a rectangular cross section that is adapted to the shape of the metal-resistant substrate.
Furthermore, the chip is arranged between the two ends of the ultrahigh frequency antenna, and the two coplanar antennas are arranged between the ultrahigh frequency antenna and the spiral part on the side where the chip is located.
According to the description, the antennas are reasonably arranged, and the closed-loop connection of the high-frequency antenna and the chip is simply and effectively realized through the two coplanar antennas.
Furthermore, the chip is a dual-frequency chip, the chip comprises at least four antenna pins, and two ends of the high-frequency antenna and two ends of the ultrahigh-frequency antenna are respectively and correspondingly electrically connected with the four antenna pins of the chip one by one; or the chip is a double-chip group consisting of a high-frequency chip and an ultrahigh-frequency chip, the high-frequency chip and the ultrahigh-frequency chip both comprise at least two antenna pins, two ends of the high-frequency antenna are electrically connected with the two antenna pins of the high-frequency antenna, and two ends of the ultrahigh-frequency antenna are electrically connected with the two antenna pins of the ultrahigh-frequency chip.
As can be seen from the above description, the dual-band chip or the chipset having two different frequencies is adapted to connect with the antenna of two frequency bands, and provides a pin electrically connected to the antenna.
Referring to fig. 1 to 4, a first embodiment of the present invention is:
the dual-frequency anti-metal electronic tag comprises a dual-frequency chip 3, a high-frequency antenna 1, an ultrahigh frequency antenna 2 and a PCB anti-metal substrate 4, wherein the ultrahigh frequency antenna 2 is arranged on the upper surface and the lower surface of the PCB anti-metal substrate 4, through holes 5 are correspondingly formed in the ultrahigh frequency antenna 2 and the PCB anti-metal substrate 4 close to the left side and the right side, and the ultrahigh frequency antennas 2 on the upper surface and the lower surface of the PCB anti-metal substrate 4 are electrically connected through the through holes 5; the high-frequency antenna 1 is arranged in the middle area surrounded by the ultrahigh-frequency antenna 2 on the PCB metal-resistant substrate 4, and a gap is arranged between the high-frequency antenna 1 and the ultrahigh-frequency antenna 2; the dual-frequency chip 3 is arranged between two ends of the ultrahigh-frequency antenna 2 on the PCB metal-resistant substrate 4, the dual-frequency chip 3 comprises four (two) pins, and the high-frequency antenna 1 and the ultrahigh-frequency antenna 2 are electrically connected with the dual-frequency chip 3 through the antenna pins; as shown in fig. 3 and 4, the coil of the high-frequency antenna 1 is in a rectangular spiral shape, and the spiral cross section is perpendicular to the plane of the ultrahigh-frequency antenna 2; in other equivalent embodiments, the dual-frequency chip 3 may include four or more pins to provide enough connection points to realize electrical connection.
As shown in fig. 1, the high frequency antenna 1 includes a spiral portion 12 and a coplanar portion 11, the cross section of the spiral portion 12 is rectangular, the circuits on one set of opposite sides of the rectangular section are disposed on two sides of the PCB metal-resistant substrate 4 where the ultra-high frequency antenna 2 is disposed, the PCB metal-resistant substrate 4 is provided with through holes penetrating through the two sides in match with the circuits on the two sides, the circuits on the other set of opposite sides of the rectangular section are disposed in the through holes, and the direction of the magnetic field formed by the spiral portion 12 faces the front or back of the electronic tag; the coplanar part 11 is arranged on the side of the PCB anti-metal substrate 4 where the dual-frequency chip 3 is located, and comprises two coplanar antennas arranged between the ultrahigh-frequency antenna 2 and the spiral part 12, one ends of the two coplanar antennas are respectively connected with two ends of the spiral part 12, and the other ends of the two coplanar antennas are connected with pins of the dual-frequency chip 3, so that the effect of connecting the spiral part 12 and the dual-frequency chip 3 to form a closed loop is achieved, and the high-frequency antenna 1 forms a complete loop circuit; in other equivalent embodiments, the PCB metal-resistant substrate 4 may be replaced with any substrate having metal-resistant properties, such as a ceramic metal-resistant substrate or an ABS metal-resistant substrate.
Referring to fig. 5 and fig. 6, a second embodiment of the present invention is:
the dual-frequency anti-metal electronic tag is based on the dual-frequency anti-metal electronic tag of the first embodiment, as shown in fig. 5, wherein the direction of the magnetic field formed by the spiral portion 12 faces the direction of the left end or the right end of the uhf antenna 2. In other equivalent embodiments, the helical portion 12 may be any helical line having a magnetic field in a direction different from the direction of the magnetic field formed by the uhf antenna 2.
The anti-metal principle of the dual-frequency anti-metal electronic tag provided by the embodiment of the utility model is that a substrate with a higher dielectric constant is used as an anti-metal substrate, the thickness of the substrate is properly increased, and antenna circuits are arranged on two sides, so that the anti-metal performance is realized; the utility model discloses an anti metal electronic tags of dual-frenquency is passive electronic tags, when reading the discernment, and high frequency antenna and hyperfrequency antenna response reading signal form the electric current, then produce the signal of corresponding frequency channel, and the performance that multi-direction was read can further send the signal of sufficient intensity for electronic tags provides sufficient power, makes electronic tags all can be read in great within range.
To sum up, the utility model provides an anti metal electronic tags of dual-frenquency uses the anti metal substrate that has anti metal effect and two-sidedly to lay the antenna line, the circuit trend design of high frequency antenna is the crossing trend of heliciform and cross-section and hyperfrequency antenna place face, according to lenz's law, the magnetic field of high frequency antenna then changes into the magnetic field with hyperfrequency antenna magnetic field equidirectional not, and then make dual-frenquency electronic tags's reader read dual-frequency electronic tags in the direction beyond the hyperfrequency reading direction, it has realized that anti metal electronic tags of dual-frenquency has the performance of multi-direction reading and adapts to the metal environment, adopt the dual-frenquency chip and set up the middle zone that the hyperfrequency antenna surrounded, the volume of label has been reduced, it is more convenient to make the label use.
The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.
Claims (10)
1. The dual-frequency anti-metal electronic tag is characterized by comprising a chip, a high-frequency antenna, an ultrahigh frequency antenna and an anti-metal substrate, wherein the ultrahigh frequency antenna is arranged on two opposite surfaces of the anti-metal substrate and electrically connected with the two surfaces of the anti-metal substrate through a through hole of the substrate;
the high-frequency antenna is arranged on the anti-metal substrate and is provided with a gap with the ultrahigh-frequency antenna, the high-frequency antenna comprises a three-dimensional spiral part, and the spiral cross section of the spiral part is intersected with any one surface of the ultrahigh-frequency antenna;
the high-frequency antenna and the ultrahigh-frequency antenna are electrically connected with the chip respectively.
2. The dual-band metal-resistant electronic tag according to claim 1, wherein the high-frequency antenna is disposed on the metal-resistant substrate in the middle region surrounded by the UHF antenna, and the spiral cross section is perpendicular to the plane of the UHF antenna.
3. The dual-frequency anti-metal electronic tag according to claim 2, wherein the anti-metal substrate is a PCB anti-metal substrate, a ceramic anti-metal substrate or an ABS anti-metal substrate.
4. The dual-frequency anti-metal electronic tag according to claim 2, wherein the chip is disposed on any side where the UHF antenna is located.
5. The dual-band anti-metal electronic tag according to claim 4, wherein the high-frequency antenna further comprises a coplanar portion, the coplanar portion comprises two coplanar antennas, the coplanar portion is located on the anti-metal substrate on which the chip is located, one end of each of the two coplanar antennas is electrically connected to the chip, the spiral portion forms a spiral line of the high-frequency antenna, and two ends of the spiral portion are respectively electrically connected to the other ends of the two coplanar antennas.
6. The dual-frequency metal-resistant electronic tag according to claim 5, wherein the spiral cross section of the spiral portion is rectangular.
7. The dual-band metal-resistant electronic tag according to claim 5, wherein the antennas of the spiral portion pass through both sides of the UHF antenna.
8. The dual-frequency anti-metal electronic tag according to claim 7, wherein two sets of through holes corresponding to each other are disposed in the middle region near two opposite edges of the anti-metal substrate, the antennas of the spiral portion sequentially pass through the corresponding through holes, and the antennas on the surface of the same anti-metal substrate are not intersected with each other.
9. The dual-band metal-resistant electronic tag according to claim 5, wherein said chip is disposed at a position between both ends of said UHF antenna, and said two coplanar antennas are disposed between said UHF antenna and said spiral portion on the side where said chip is disposed.
10. The dual-frequency anti-metal electronic tag according to claim 1, wherein the chip is a dual-frequency chip, the chip comprises at least four antenna pins, and two ends of the high-frequency antenna and two ends of the ultrahigh-frequency antenna are electrically connected with the four antenna pins of the chip in a one-to-one correspondence manner;
or the chip is a double-chip group consisting of a high-frequency chip and an ultrahigh-frequency chip, the high-frequency chip and the ultrahigh-frequency chip both comprise at least two antenna pins, two ends of the high-frequency antenna are electrically connected with the two antenna pins of the high-frequency chip, and two ends of the ultrahigh-frequency antenna are electrically connected with the two antenna pins of the ultrahigh-frequency chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120504772.4U CN215068307U (en) | 2021-03-10 | 2021-03-10 | Double-frequency anti-metal electronic tag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120504772.4U CN215068307U (en) | 2021-03-10 | 2021-03-10 | Double-frequency anti-metal electronic tag |
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| Publication Number | Publication Date |
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| CN215068307U true CN215068307U (en) | 2021-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120504772.4U Active CN215068307U (en) | 2021-03-10 | 2021-03-10 | Double-frequency anti-metal electronic tag |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114914677A (en) * | 2022-05-05 | 2022-08-16 | 福州大学 | Ultrahigh frequency RFID double-sided anti-metal tag antenna with high power transmission coefficient |
| WO2024025467A1 (en) * | 2022-07-27 | 2024-02-01 | Nanyang Technological University | Dual-band radio frequency identification tag antenna for metallic objects |
-
2021
- 2021-03-10 CN CN202120504772.4U patent/CN215068307U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114914677A (en) * | 2022-05-05 | 2022-08-16 | 福州大学 | Ultrahigh frequency RFID double-sided anti-metal tag antenna with high power transmission coefficient |
| WO2024025467A1 (en) * | 2022-07-27 | 2024-02-01 | Nanyang Technological University | Dual-band radio frequency identification tag antenna for metallic objects |
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