CN220569892U - L-shaped NFC antenna structure - Google Patents
L-shaped NFC antenna structure Download PDFInfo
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- CN220569892U CN220569892U CN202321945430.1U CN202321945430U CN220569892U CN 220569892 U CN220569892 U CN 220569892U CN 202321945430 U CN202321945430 U CN 202321945430U CN 220569892 U CN220569892 U CN 220569892U
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- nfc antenna
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- shaped nfc
- feed point
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- 238000000034 method Methods 0.000 claims abstract description 14
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 12
- 230000008569 process Effects 0.000 claims abstract description 9
- 230000007704 transition Effects 0.000 claims abstract description 5
- 238000007639 printing Methods 0.000 claims description 9
- 238000005516 engineering process Methods 0.000 claims description 6
- 238000010329 laser etching Methods 0.000 claims description 4
- 238000010030 laminating Methods 0.000 claims description 2
- 238000010017 direct printing Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 6
- 239000011521 glass Substances 0.000 description 6
- 230000007547 defect Effects 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229910052594 sapphire Inorganic materials 0.000 description 3
- 239000010980 sapphire Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000007649 pad printing Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000011257 shell material Substances 0.000 description 1
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Abstract
The utility model relates to an L-shaped NFC antenna structure which comprises an L-shaped NFC antenna directly printed on the outer surface of an antenna support carrier through a PDS (power transfer system) process, wherein two ends of the L-shaped NFC antenna are respectively connected with a main board electronic circuit through a first antenna via hole and a second antenna via hole, ferrite is attached to the inner surface of the antenna support carrier, and a slope or a rounded corner transition is arranged at the level difference position of the antenna support carrier. Compared with the prior art, the utility model has the advantages of simple integral structure and flexible design, can reduce the working procedure of attaching the FPC, and can synchronously print with other built-in antennas; the device can be suitable for wiring installation of curved surfaces and step surfaces, and ensures RF functions; in addition, in the structural space, the space utilization rate can be improved better, the assembly thickness can be reduced, and the distance can be avoided for other devices; the processing and manufacturing cost and the material cost can be effectively reduced.
Description
Technical Field
The utility model relates to the technical field of electronic communication antenna design, in particular to an L-shaped NFC antenna structure.
Background
Along with the development of miniaturization of wireless communication products, NFC antennas become an indispensable part in current mobile communication equipment, NFC transmits electromagnetic signals through near field coupling, the working distance of the antennas is far smaller than that of traditional antennas, the common NFC antenna is provided with ring-shaped, square-shaped, L-shaped and the like, the L-shaped NFC antennas are the current mainstream, but the L-shaped NFC antennas used in the market have some defects, such as being manufactured by adopting FPC (Flexible Printed Circuit ) technology, although the L-shaped NFC antennas can be pasted on a plane, but can not be pasted on curved surfaces and section difference surfaces, and the thickness is large, the stacking of the whole machine can be influenced, in addition, the cost of the FPC technology is high, and the NFC antennas need to be pasted on a bracket after being pasted with ferrite, and have complicated procedures and high price; the LDS (Laser Direct Structuring ) process is adopted, namely, the material is activated by laser through a laser carving process, and exposed metal atoms provide a seed layer for the electroplating below, but the seed layer cannot be realized on certain special materials (such as glass, ceramic, zirconia, sapphire glass and the like) due to the fact that special raw materials are required to be used.
In summary, the existing L-shaped antenna has high manufacturing cost and large overall thickness, is unfavorable for stacking the whole machine inside the equipment, and can not be reliably adapted to curved surfaces and level difference surfaces, so that the subsequent RF (Radio Frequency) function is affected.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide an L-shaped NFC antenna structure which can reduce the overall thickness and the processing and manufacturing cost and is suitable for wiring installation of curved surfaces and stepped surfaces.
The aim of the utility model can be achieved by the following technical scheme: the utility model provides an L type NFC antenna structure, includes the L type NFC antenna of printing in antenna support carrier surface through PDS (Printing Direct Structure, direct pad printing shaping) technology directness, the both ends of L type NFC antenna are connected with mainboard electronic circuit through first antenna via hole, second antenna via hole respectively, antenna support carrier internal surface laminating has ferrite, antenna support carrier's level difference position is provided with slope or chamfer transition.
Further, a first feed point and a second feed point which are respectively contacted with the main board elastic sheet are arranged on the inner surface of the antenna support carrier, the first feed point is connected with the first antenna via hole, and the second feed point is connected with the second antenna via hole.
Further, an antenna area for printing the L-shaped NFC antenna and a feed point area for installing the first feed point and the second feed point are arranged on the antenna support carrier.
Further, the coverage area of the ferrite is larger than the projection area of the L-shaped NFC antenna.
Further, the antenna area and the feed point area are areas after oil flying is removed through a laser etching process.
Further, the main board is mounted on the bottom surface of the antenna support carrier.
Further, the width of the L-shaped NFC antenna is greater than or equal to 2mm, and the total length and the total width of the L-shaped NFC antenna are 40mm.
Further, the thickness of the L-shaped NFC antenna is less than or equal to 10 mu m.
Further, the thickness of the antenna region is less than or equal to 1.0mm.
Further, the first antenna via hole and the second antenna via hole are unidirectional horn holes.
Compared with the prior art, the utility model has the following advantages:
1. according to the utility model, the L-shaped NFC antenna is directly printed on the outer surface of the antenna support carrier through a PDS (plasma display panel) process, two ends of the L-shaped NFC antenna are respectively connected with a main board electronic circuit through a first antenna via hole and a second antenna via hole, ferrite is attached to the inner surface of the antenna support carrier, and a slope or a rounded corner transition is arranged at the level difference position of the antenna support carrier. Therefore, the manufacturing cost of the NFC antenna can be effectively reduced; the antenna plastic shell carrier does not need to be attached with an FPC, so that the overall thickness is reduced, and the stacking of an internal space structure is more advantageous; the bonding procedure of FPC and ferrite can be reduced, and the cost is further reduced; the defects of lamination wrinkling and warping of a traditional FPC technology in curved surfaces and stepped areas can be effectively overcome, normal printing of NFC antennas is ensured, and reliable realization of RF functions is ensured.
2. According to the utility model, the feed points are arranged on the inner surface of the antenna support carrier, so that the two antenna through holes are respectively connected with the main board electronic circuit correspondingly through the feed points, a complete antenna loop can be formed, and terminal circuit connection and antenna performance are effectively realized.
3. According to the utility model, the antenna area and the feed point area are arranged on the antenna support carrier, and the areas are all areas after oil flying is removed through a laser etching process, so that the falling off of the printed antenna can be effectively prevented, and the reject ratio is reduced.
4. In the utility model, the ferrite coverage area is larger than the projection area of the L-shaped NFC antenna, so that the interference of a main board device on the antenna magnetic field can be fully shielded.
5. According to the utility model, the L-shaped NFC antenna is directly printed on the outer surface of the antenna support carrier in a PDS printing wiring mode, so that the material of the antenna support carrier is not limited any more, and the antenna support carrier can be made of plastic, glass, ceramic, zirconia, sapphire glass and the like.
Drawings
FIG. 1 is a schematic top view of the present utility model;
FIG. 2 is a schematic view of the bottom structure of the present utility model;
fig. 3 is a schematic cross-sectional structure of a first antenna via and a second antenna via in an embodiment;
the figure indicates:
1. antenna bracket carrier 2, first antenna via hole, 3, L type NFC antenna, 4, second antenna via hole, 5, first feed point, 6, second feed point.
Detailed Description
The utility model will now be described in detail with reference to the drawings and specific examples.
Examples
As shown in fig. 1 and fig. 2, an L-type NFC antenna structure includes an L-type NFC antenna 3 directly printed on an outer surface of an antenna support carrier 1 by a PDS process (the width of the L-type NFC antenna 3 is greater than or equal to 2mm, and the total length and the total width of the L-type NFC antenna 3 are 40 mm), two ends of the L-type NFC antenna 3 are respectively connected with a motherboard electronic circuit through a first antenna via hole 2 and a second antenna via hole 4, wherein the motherboard is mounted on the bottom surface of the antenna support carrier 1, a first feed point 5 and a second feed point 6 which are respectively contacted with a motherboard shrapnel are disposed on an inner surface of the antenna support carrier 1, the first feed point 5 is connected with the first antenna via hole 2, and the second feed point 6 is connected with the second antenna via hole 4, so that the L-type NFC antenna 3 is led to the inner surface of the antenna support carrier 1 through the via hole, is connected to the feed point and then contacted with the motherboard shrapnel, so as to realize the antenna function.
Specifically, an antenna area for printing the L-shaped NFC antenna 3, and a feed point area for mounting the first feed point 5 and the second feed point 6 are provided on the antenna mount carrier 1. In practical application, the antenna area needs to be flat, cannot have the level differences of sharp corners, ejector pins, glue inlets, mold closing lines and the like, and if the level differences cannot be avoided, the level differences are transited by arranging slopes and rounding corners, so that the wiring can be conveniently printed; in addition, the antenna area, the feed-through area and the antenna via area need to avoid other electronic devices, so that the interference of the electronic devices is prevented, and in addition, the antenna area cannot be provided with other metal contacts (metal brackets and the like), so that the short-circuit failure of the contact antenna is prevented.
Considering that the antenna is printed on the flying oil, the phenomenon of falling off can be generated due to insufficient adhesive force, the designed antenna area and the feed point area are areas after the flying oil is removed through a laser etching process, so that the falling off of the printed antenna is prevented, and the reject ratio is reduced.
In addition, the inner surface of the antenna support carrier 1 is adhered with ferrite to shield the interference of the main board device on the antenna magnetic field, the coverage area of the ferrite is larger than the projection area of the L-shaped NFC antenna 3, the thickness of the L-shaped NFC antenna 3 is smaller than or equal to 10 mu m, and the thickness of the antenna area is smaller than or equal to 1.0mm for further ensuring the assembly thickness.
To ensure the reliability of the wiring connection, the first antenna via hole 2 and the second antenna via hole 4 are unidirectional horn holes, as shown in fig. 3, the small hole end aperture isThe pore diameter of the macroporous end is->(1.2 mm in this example).
In summary, the technical scheme is to design an antenna according to the environment and space of an RF engineer aiming at a terminal product, manufacture an L-shaped NFC antenna by adopting a PDS mode, print the L-shaped NFC wiring on an antenna support carrier directly, reduce cost, improve yield and improve productivity, and connect an antenna via hole, a feed point and an elastic sheet to an electronic circuit on a PCB board to form a complete antenna loop, so as to realize terminal circuit connection and antenna performance, thereby meeting the requirements of transmitting and receiving antenna signals, the signals are not limited to frequency bands such as communication, GPS, WIFI, BT and terminal payment functions, and the antenna support carrier is not limited to materials such as plastic shell, glass, ceramic, zirconia and sapphire glass, and reliable printing can be realized.
According to the technical scheme, the FPC does not need to be attached, so that the overall thickness is reduced, and the stacking of the internal space structure of the equipment product is more advantageous;
according to the technical scheme, the manufacturing cost of the antenna can be saved, the antennas with multiple purposes can be synchronously printed, the printing times are reduced, and the corresponding performance can meet the requirements; the bonding procedure of FPC and ferrite can be reduced, and the cost is synchronously reduced;
for the area of the L-shaped NFC antenna with the flying oil (the phenomenon that the antenna is not enough in adhesive force and can fall off when printed on the flying oil), the flying oil can be removed by adopting a laser carving method, so that the falling off of the printed antenna is prevented, and the reject ratio is reduced;
through slope or chamfer transition, the defect that the traditional FPC technology is attached, wrinkled and tilted can be effectively overcome through the routing of the curved surface or the step area, the routing area of the antenna is increased, and the RF function is better realized.
Claims (10)
1. The utility model provides an L type NFC antenna structure, its characterized in that includes L type NFC antenna (3) in antenna boom carrier (1) surface through PDS technology direct printing, the both ends of L type NFC antenna (3) are connected with mainboard electronic circuit through first antenna via hole (2), second antenna via hole (4) respectively, antenna boom carrier (1) internal surface laminating has ferrite, the poor position of section of antenna boom carrier (1) is provided with slope or chamfer transition.
2. An L-shaped NFC antenna structure according to claim 1, characterized in that the inner surface of the antenna support carrier (1) is provided with a first feed point (5) and a second feed point (6) which are respectively in contact with the motherboard shrapnel, the first feed point (5) is connected with the first antenna via (2), and the second feed point (6) is connected with the second antenna via (4).
3. An L-shaped NFC antenna structure according to claim 2, characterized in that the antenna support carrier (1) is provided with an antenna area for printing an L-shaped NFC antenna (3), a feed point area for mounting a first feed point (5) and a second feed point (6).
4. An L-shaped NFC antenna structure according to claim 1, characterized in that the coverage area of the ferrite is larger than the projected area of the L-shaped NFC antenna (3).
5. An L-type NFC antenna structure according to claim 3, wherein the antenna area and the feed point area are areas after oil flying is removed by a laser etching process.
6. An L-shaped NFC antenna structure according to claim 1 characterized in that the motherboard is mounted on the bottom surface of the antenna bracket carrier (1).
7. An L-shaped NFC antenna structure according to claim 1, characterized in that the width of the L-shaped NFC antenna (3) is greater than or equal to 2mm, the total length and total width of the L-shaped NFC antenna (3) being 40mm.
8. An L-shaped NFC antenna structure according to claim 3, characterized in that the thickness of the L-shaped NFC antenna (3) is less than or equal to 10 μm.
9. An L-shaped NFC antenna structure according to claim 8 wherein the thickness of the antenna area is less than or equal to 1.0mm.
10. An L-shaped NFC antenna structure according to any of claims 1-9, wherein the first antenna via (2) and the second antenna via (4) are unidirectional horn holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321945430.1U CN220569892U (en) | 2023-07-24 | 2023-07-24 | L-shaped NFC antenna structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321945430.1U CN220569892U (en) | 2023-07-24 | 2023-07-24 | L-shaped NFC antenna structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220569892U true CN220569892U (en) | 2024-03-08 |
Family
ID=90103698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321945430.1U Active CN220569892U (en) | 2023-07-24 | 2023-07-24 | L-shaped NFC antenna structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220569892U (en) |
-
2023
- 2023-07-24 CN CN202321945430.1U patent/CN220569892U/en active Active
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