CN215341157U - Graphene RFID electronic tag of high-frequency circular coil antenna - Google Patents
Graphene RFID electronic tag of high-frequency circular coil antenna Download PDFInfo
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- CN215341157U CN215341157U CN202121751113.7U CN202121751113U CN215341157U CN 215341157 U CN215341157 U CN 215341157U CN 202121751113 U CN202121751113 U CN 202121751113U CN 215341157 U CN215341157 U CN 215341157U
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Abstract
The utility model relates to a graphene RFID electronic tag of a high-frequency circular coil antenna, which comprises: a graphene RFID electronic tag of a high-frequency circular coil antenna structurally comprises: the antenna comprises an initial end and a termination end, the antenna extends from the initial end one by one to form a coil, and the terminal point of the antenna is set as the termination end; the electronic chip is arranged on the antenna; the first connecting bridge is used for connecting the starting end and the terminating end of the antenna so as to enable the coil to form a loop; the insulating layer is used for isolating the connecting bridge from the coil; the substrate is used for bearing the antenna, the insulating layer, the first connecting bridge and the electronic chip; the antenna has the advantages of high transmission efficiency, good performance index, shape of a circular antenna, exquisite size, simple structure, low manufacturing cost and easy combination with other objects.
Description
Technical Field
The utility model relates to the field of electronic tag manufacturing, in particular to a graphene RFID electronic tag of a high-frequency circular coil antenna.
Background
The RFID system is a non-contact automatic identification system, which automatically identifies a target object by a radio frequency wireless signal and acquires related data. RFID can be classified into low frequency, high frequency, and ultra high frequency according to the frequency of electromagnetic waves used by the RFID system. The RFID system has different compositions due to different applications, but basically comprises three major parts, namely an electronic tag, a reader-writer and an application system.
The electronic tag generally comprises a tag antenna and a tag chip; the tag antenna is important for the RFID system and is a key component for determining the performance of the RFID system. Regarding a circular antenna, when the antenna is designed, the inductance of the antenna needs to be improved so as to improve the working efficiency of the antenna, and the antenna with good performance index is designed; meanwhile, the requirements of small size, simple structure, low cost and easy combination with other objects are met, and a novel RFID electronic tag is provided based on the application.
SUMMERY OF THE UTILITY MODEL
The graphene RFID electronic tag of the high-frequency circular coil antenna has the advantages of high transmission efficiency, good performance index, shape of the circular antenna, exquisite size, simple structure, low manufacturing cost and easiness in combination with other objects, so that the technical problem is solved.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
a graphene RFID electronic tag of a high-frequency circular coil antenna structurally comprises: the antenna comprises an initial end and a termination end, the antenna extends from the initial end one by one to form a coil, and the terminal point of the antenna is set as the termination end; the electronic chip is arranged on the antenna; the first connecting bridge is used for connecting the starting end and the terminating end of the antenna so as to enable the coil to form a loop; the insulating layer is used for isolating the connecting bridge from the coil; the substrate is used for bearing the antenna, the insulating layer, the first connecting bridge and the electronic chip.
The structure enables the antenna to form a loop, and the antenna bears the electronic chip; when the electronic tag works, after the tag enters a magnetic field, the tag receives a radio frequency signal sent by the reader, the energy obtained by the induced current is transmitted to the electronic chip through the antenna, an internal circuit of the electronic chip is activated so as to send out information stored in the electronic chip, and after the reader reads and decodes the information, the decoded information is sent to the central information system for related data processing. The structure in this application is then through improving the transmission efficiency of antenna to induced-current, and then improves electronic tags's work efficiency.
In a preferred implementation, the antenna extends from the inside to the outside, with the start located inside the coil. In order to make the antenna coil have more exquisite and simple structure, still need to guarantee the work efficiency of coil simultaneously, so adopt from inside to outside carry out the mode that sets up circle by circle with the antenna, in preferred implementation, above-mentioned coil is the most inboard reserves a space, is convenient for set up structures such as bridge to further optimize coil structure.
In a preferred implementation, the innermost antenna of the coil is provided with a second bridge for connecting the electronic chip. The second bridge is preferably disposed in a space reserved at the innermost side of the coil, and the second bridge is connected to the antenna and carries the electronic chip, so that an induced current passing through the antenna can flow through the electronic chip through the second bridge, so that an internal circuit of the electronic chip is activated to generate a magnetic field.
In a preferred implementation, the second bridge includes a left bridge and a right bridge, the left bridge and the right bridge are respectively connected to the antenna, and the electronic chip is disposed between the left bridge and the right bridge to form a passage.
The left connecting bridge and the right connecting bridge are both arranged on the inner side of the antenna coil and are respectively connected with the innermost circle of antennas; the left connecting bridge and the right connecting bridge are separately arranged, the electronic chip is arranged between the left connecting bridge and the right connecting bridge and respectively connected with the left connecting bridge and the right connecting bridge, and the electronic chip plays a role in connecting the left connecting bridge and the right connecting bridge and forming a passage, so that current flowing through the antenna smoothly flows through the electronic chip and activates a circuit inside the electronic chip.
In a preferred implementation, the first bridge comprises an inner bridge, a conductive rubber strip and an outer bridge, the inner bridge is connected with the starting end, the outer bridge is connected with the terminating end, and the conductive rubber strip is respectively connected with the inner bridge and the outer bridge, so that the coils form a loop. The inner and outer connecting bridges and the conductive adhesive tape jointly connect the starting end and the terminating end of the antenna, so that the antenna coil jointly forms a loop, and the conductive adhesive tape is very flexible to use, can be connected with the starting end and the terminating end of the antenna at will according to the relative positions of the starting end and the terminating end of the antenna, so that the starting end and the terminating end of the antenna are conducted, and the antenna is favorably produced; and the conductive adhesive tape has good conductive capability, and can effectively ensure the working efficiency of the antenna.
In a preferred implementation, the number of turns of the antenna is set to 11 and the wire pitch is set to 0.15 mm.
The transmission efficiency of the antenna is related to the inductance value, the energy loss of the antenna coil is related to the number of turns of the antenna, the line width of the antenna and the distance between the lines of the antenna, and when the antenna is designed, the influence of each parameter of the antenna on the inductance of the antenna is comprehensively considered, so that the antenna with good performance index is designed. When the number of turns of the antenna and the distance between the wires are selected, a control experiment is carried out so as to select an optimal scheme. According to the requirements of the size of the tag, the working frequency, the matching chip and the application condition, an antenna model is established, simulation calculation is carried out on the antenna model, simulation is carried out by adopting HFSS electromagnetic simulation software, and the influence of the number of turns of a coil, the wire diameter and the wire distance on the antenna performance inductance is tested under the loading of the same 13.56MHz signal.
(1) Keeping the coil width and the coil pitch constant, which are 0.5mm and 0.2mm, respectively, as shown in fig. 2, it can be seen from fig. 2 that changing the number of turns of the coil will affect the antenna inductance under the condition that the line width and the line pitch are constant. The inductance value increases along with the increase of the number of turns of the coil, the increase range is changed from fast to slow, mainly because the difference between the circumference of the coil of the inner ring and the circumference of the coil of the outer ring is larger and larger, and a certain limit is generated on the increase trend of the inductance value.
(2) And keeping the number of turns and the line width of the coil unchanged, and testing the variation trend of the antenna inductance along with the coil distance. As can be seen from fig. 3, as the coil pitch decreases, the inductance of the coil gradually increases, mainly because a small coil pitch increases the magnetic field coupling of the inductor, thereby increasing the mutual inductance value and thus the inductance value. And can be seen at the same time.
According to the test result, the performance of the antenna with the number of coil turns of 11 and the wire spacing of 0.15mm under the same loading of 13.56MHz signals is optimal, and the read-write distance reaches 6 cm.
In a preferred implementation, the insulating layer is disposed on the lower portion of the bead so as to isolate the bead from the coil below the bead. Above-mentioned insulating layer keeps apart conducting strip and antenna, can avoid conducting current in conducting strip and the antenna to produce the interference each other, can strengthen antenna operating condition's stability.
In a preferred implementation, the antenna is formed by printing a graphene conductive paste.
The graphene conductive paste can effectively improve the conductivity and stability of the antenna, and can be printed on almost all substrates such as plastic films, paper, ceramics, fibers and the like.
In a preferred embodiment, the substrate is coated paper. The coated paper has smooth surface, high whiteness and good ink absorption and absorption performance, and is beneficial to printing the antenna with good quality.
In a preferred embodiment, the outer contour of the coil is circular and its diameter dimension is 23 mm. The structure helps to optimize the structure of the antenna coil, so that the antenna coil is easier to combine with other objects, and the applicability of the application can be improved.
The utility model adopts the structure and has the advantages that:
the antenna has high transmission efficiency, good performance index, the shape of a circular antenna, exquisite size, simple structure, low manufacturing cost and easy combination with other objects.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model. In the drawings:
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a graph of inductance versus number of turns of the coil in accordance with the present invention.
Fig. 3 is a graph of inductance versus coil spacing according to the present invention.
In the figure, the position of the upper end of the main shaft,
1. an antenna; 101. a first bridge; 1011. an inner connecting bridge; 1012. an outer connecting bridge; 102. a second bridge; 1021. a left connecting bridge; 1022. a right connecting bridge; 103. a starting end; 104. a terminating end; 105. a conductive adhesive tape; 2. an electronic chip; 3. an insulating layer; 4. a substrate.
Detailed Description
In order to more clearly explain the overall concept of the present invention, the following detailed description is given by way of example in conjunction with the accompanying drawings.
It should be noted that in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.
As shown in fig. 1 to 3, a graphene RFID tag of a high-frequency circular coil antenna has a structure including: the antenna comprises an antenna 1, an electronic chip 2, a first connecting bridge 101, an insulating layer 3 and a base material 4, wherein the antenna 1 comprises a starting end 103 and a terminating end 104, the antenna 1 extends from the starting end 103 to form a coil one by one, and the terminating end 104 is set as the terminal end of the antenna 1; the electronic chip 2 is arranged on the antenna 1; the first bridge 101 is used to connect the start end 103 and the stop end 104 of the antenna 1, so that the coil forms a loop; the insulating layer 3 is used for isolating the connecting bridge from the coil; the substrate 4 is used for carrying the antenna 1, the insulating layer 3, the first bridge 101 and the electronic chip 2.
The structure enables the antenna 1 to form a loop, and the antenna 1 bears the electronic chip 2; when the electronic tag works, after the tag enters a magnetic field, the tag receives a radio frequency signal sent by a reader, the radio frequency signal is transmitted to the electronic chip 2 through the antenna 1 by virtue of energy obtained by induced current, an internal circuit of the electronic chip 2 is activated so as to send information stored in the electronic chip 2, and after the reader reads and decodes the information, the decoded information is sent to a central information system for related data processing. The structure in this application is through improving antenna 1 to the transmission efficiency of induced-current, and then improves electronic tags's work efficiency.
In a preferred implementation, the antenna 1 extends from the inside to the outside, with the start 103 located inside the coil. In order to make the coil of the antenna 1 have a more exquisite and simple structure and ensure the working efficiency of the coil, the antenna 1 is arranged from inside to outside in a way of being arranged circle by circle, in a preferred implementation mode, a space is reserved at the innermost side of the coil, structures such as a connecting bridge are convenient to arrange, and the coil structure is further optimized.
In a preferred implementation, the innermost antenna of the coil is provided with a second bridge 102, the second bridge 102 being used for connecting the electronic chip 2. The second bridge 102 is preferably disposed in a space reserved at the innermost side of the coil, and the second bridge 102 is connected to the antenna 1 and carries the electronic chip 2, so that an induced current passing through the antenna 1 can flow through the electronic chip 2 through the second bridge 102, so that an internal circuit of the electronic chip 2 is activated to generate a magnetic field.
In a preferred implementation, the second bridge 102 includes a left bridge 1021 and a right bridge 1022, the left bridge 1021 and the right bridge 1022 are respectively connected to the antenna 1, and the electronic chip 2 is disposed between the left bridge 1021 and the right bridge 1022 to form a path.
The left connecting bridge 1021 and the right connecting bridge 1022 are both arranged on the inner side of the coil of the antenna 1 and are respectively connected with the innermost circle of the antenna 1; the left connecting bridge 1021 and the right connecting bridge 1022 are separately arranged, the electronic chip 2 is arranged between the left connecting bridge 1021 and the right connecting bridge 1022, and the electronic chip 2 is connected with the left connecting bridge 1021 and the right connecting bridge 1022 to form a channel, so that the current flowing through the antenna 1 smoothly flows through the electronic chip 2 and activates the internal circuit thereof.
In a preferred implementation, the first bridge 101 comprises an inner bridge 1011, an electrically conductive strip 105 and an outer bridge 1012, the inner bridge 1011 being connected to the starting end 103, the outer bridge 1012 being connected to the terminating end 104, and the electrically conductive strip 105 being connected to the inner bridge 1011 and the outer bridge 1012, respectively, such that the coils form a loop. The inner and outer bridges 1012 and the conductive rubber strip 105 jointly connect the start end 103 and the termination end 104 of the antenna 1, so that the coil of the antenna 1 jointly forms a loop, and the conductive rubber strip 105 is very flexible to use, can be freely connected according to the relative positions of the start end 103 and the termination end 104 of the antenna 1, so that the antenna 1 is conducted, and is beneficial to the production of the antenna 1; and the conductive adhesive tape 105 has good conductive capability, and can effectively ensure the working efficiency of the antenna 1.
In a preferred implementation, the number of coil turns of the antenna 1 is set to 11 and the wire pitch is set to 0.15 mm.
The transmission efficiency of the antenna 1 is related to the inductance value, the energy loss of the coil of the antenna 1 is related to the number of turns of the antenna 1, the line width of the antenna 1 and the distance between lines of the antenna 1, and when designing the antenna 1, the influence of each parameter of the antenna 1 on the inductance of the antenna 1 is comprehensively considered, so that the antenna 1 with good performance index is designed. When the number of turns of the antenna 1 and the wire spacing are selected, a control experiment is carried out so as to select an optimal scheme. According to the requirements of the size of the tag, the working frequency, the matching chip and the application condition, an antenna 1 model is established, simulation calculation is carried out on the antenna 1 model, HFSS electromagnetic simulation software is adopted for simulation, and the influence of the number of turns of a coil, the wire diameter and the wire distance on the performance inductance of the antenna 1 is tested under the loading of the same 13.56MHz signal.
(1) Keeping the coil width and the coil pitch constant, which are 0.5mm and 0.2mm, respectively, as shown in fig. 2, it can be seen from fig. 2 that changing the number of turns of the coil will affect the inductance of the antenna 1 under the condition that the line width and the line pitch are constant. The inductance value increases along with the increase of the number of turns of the coil, the increase range is changed from fast to slow, mainly because the difference between the circumference of the coil of the inner ring and the circumference of the coil of the outer ring is larger and larger, and a certain limit is generated on the increase trend of the inductance value.
(2) And keeping the number of turns and the line width of the coil unchanged, and testing the variation trend of the inductance of the antenna 1 along with the distance of the coil. As can be seen from fig. 3, as the coil pitch decreases, the inductance of the coil gradually increases, mainly because a small coil pitch increases the magnetic field coupling of the inductor, thereby increasing the mutual inductance value and thus the inductance value. And can be seen at the same time.
According to the test result, the antenna 1 with the number of coil turns of 11 and the wire spacing of 0.15mm is selected to have the optimal performance under the same loading of 13.56MHz signals, and the reading and writing distance reaches 6 cm.
In a preferred implementation, the insulating layer 3 is disposed under the bead 105 to insulate the bead 105 from the underlying windings. The insulating layer 3 isolates the conductive adhesive tape 105 from the antenna 1, so that interference between the conductive adhesive tape 105 and the antenna 1 during current conduction can be avoided, and the stability of the working state of the antenna 1 can be enhanced.
In a preferred implementation, the antenna 1 is formed by printing of a graphene conductive paste.
The graphene conductive paste can effectively improve the conductivity and stability of the antenna 1, and can be printed on almost all substrates 4, such as plastic films, paper, ceramics, fibers and the like.
In a preferred implementation, the substrate 4 is provided as coated paper. The coated paper has smooth surface, high whiteness and good ink absorption and absorption performance, and is beneficial to printing the antenna 1 with good quality.
In a preferred embodiment, the outer contour of the coil is circular and its diameter dimension is 23 mm. The above structure helps to optimize the structure of the coil of the antenna 1 to make it easier for other objects to be combined, so that the applicability of the present application can be improved.
The technical solutions protected by the present invention are not limited to the above embodiments, and it should be noted that the combination of the technical solution of any one embodiment and the technical solution of one or more other embodiments is within the protection scope of the present invention. Although the utility model has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the utility model. Accordingly, such modifications and improvements are intended to be within the scope of the utility model as claimed.
Claims (10)
1. The utility model provides a graphite alkene RFID electronic tags of high frequency circular coil antenna which characterized in that includes:
the antenna comprises a starting end and a terminating end, the antenna extends from the starting end one by one to form a coil, and the terminal point of the antenna is set as the terminating end;
the electronic chip is arranged on the antenna;
the first connecting bridge is used for connecting the starting end and the terminating end of the antenna so as to enable the coil to form a loop;
an insulating layer for isolating the bridge from the coil;
the substrate is used for bearing the antenna, the insulating layer, the first connecting bridge and the electronic chip.
2. The graphene RFID tag of the high-frequency circular coil antenna according to claim 1, wherein the antenna extends from inside to outside, and the starting end is located inside the coil.
3. The graphene RFID tag of the high-frequency circular coil antenna according to claim 2, wherein a second bridge is arranged on the innermost antenna of the coil, and the second bridge is used for connecting the electronic chip.
4. The graphene RFID tag of the high-frequency circular coil antenna according to claim 3, wherein the second bridge comprises a left bridge and a right bridge, the left bridge and the right bridge are respectively connected with the antenna, and the electronic chip is arranged between the left bridge and the right bridge to form a passage.
5. The graphene RFID tag of the high-frequency circular coil antenna according to claim 1, wherein the first bridge comprises an inner bridge, a conductive adhesive tape and an outer bridge, the inner bridge is connected with the starting end, the outer bridge is connected with the terminating end, and the conductive adhesive tape is respectively connected with the inner bridge and the outer bridge, so that the coil forms a loop.
6. The graphene RFID tag of the high-frequency circular coil antenna according to claim 1, wherein the number of coil turns of the antenna is set to 11, and the wire spacing is set to 0.15 mm.
7. The graphene RFID tag of the high-frequency circular coil antenna according to claim 5, wherein the insulating layer is disposed on a lower portion of the conductive adhesive tape to isolate the conductive adhesive tape from the coil on the lower portion.
8. The graphene RFID tag of the high-frequency circular coil antenna according to claim 1, wherein the antenna is formed by printing graphene conductive paste.
9. The graphene RFID tag of the high-frequency circular coil antenna according to claim 1, wherein the substrate is a coated paper.
10. The graphene RFID tag of the high-frequency circular coil antenna according to claim 1, wherein the outer contour of the coil is circular, and the diameter of the coil is 23 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121751113.7U CN215341157U (en) | 2021-07-29 | 2021-07-29 | Graphene RFID electronic tag of high-frequency circular coil antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121751113.7U CN215341157U (en) | 2021-07-29 | 2021-07-29 | Graphene RFID electronic tag of high-frequency circular coil antenna |
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| Publication Number | Publication Date |
|---|---|
| CN215341157U true CN215341157U (en) | 2021-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121751113.7U Active CN215341157U (en) | 2021-07-29 | 2021-07-29 | Graphene RFID electronic tag of high-frequency circular coil antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215341157U (en) |
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2021
- 2021-07-29 CN CN202121751113.7U patent/CN215341157U/en active Active
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