CN210092331U - NFC antenna and mobile terminal - Google Patents
NFC antenna and mobile terminal Download PDFInfo
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- CN210092331U CN210092331U CN201920759851.2U CN201920759851U CN210092331U CN 210092331 U CN210092331 U CN 210092331U CN 201920759851 U CN201920759851 U CN 201920759851U CN 210092331 U CN210092331 U CN 210092331U
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Abstract
The utility model discloses a NFC antenna and a mobile terminal, which comprises a substrate and a coil formed by winding a wire, wherein the coil is embedded in the substrate, and when the NFC antenna is electrified, the current direction of one side of the coil is opposite to the current direction of the opposite side; the NFC antenna also comprises a first magnetic sheet and a second magnetic sheet which are respectively attached to the front surface and the back surface of the substrate, wherein the first magnetic sheet covers all wires in a first area on the front surface of the substrate, and the second magnetic sheet covers all wires in a second area on the back surface of the substrate; the first area at least comprises an area formed by the conducting wire which is arranged at the innermost circle in one side of the coil and vertically extends to the conducting wire which is arranged at the outermost circle in the other side of the coil, and the second area at least comprises an area formed by the conducting wire which is arranged at the innermost circle in the other side of the coil and vertically extends to the conducting wire which is arranged at the outermost circle in the other side. The utility model discloses cover two magnetic sheet subsides at the positive and negative of base plate, can avoid the wire of the inside relative both sides of base plate because of the distance too near, the problem that the magnetic line of force that current direction is opposite leads to offsets when the circular telegram, the miniaturization of the NFC antenna of being convenient for.
Description
Technical Field
The utility model relates to a mobile communication technology field especially relates to a NFC antenna and mobile terminal.
Background
Near Field Communication (Near Field Communication) is an emerging technology, devices (such as mobile phones) using the NFC technology can exchange data when being close to each other, and is integrated and evolved from a non-contact Radio Frequency Identification (RFID) and an interconnection and intercommunication technology, and applications such as mobile payment, electronic ticketing, door control, mobile identity recognition, anti-counterfeiting and the like are realized by integrating functions of an induction type card reader, an induction type card and point-to-point Communication on a single chip and using a mobile terminal. The near field communication service combines the near field communication technology and the mobile communication technology, realizes multiple functions of electronic payment, identity authentication, ticketing, data exchange, anti-counterfeiting, advertisement and the like, and is a novel service in the field of mobile communication. The near field communication service changes the mode of using the mobile phone by the user, so that the consumption behavior of the user gradually becomes electronization, and a novel user consumption and service mode is established.
Along with the development of science and technology, many electronic product, the function is more powerful, and the space of reserving for the NFC antenna is more and more littleer, and on the other hand market competition pressure is bigger and bigger, so the requirement to the miniaturization of NFC antenna is inevitable trend, after the miniaturization of NFC antenna, not only will design out the product that the characteristic is good in limited space, but also can great saving cost to improve the competitiveness in market.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects of the prior art, the main object of the utility model is to provide an NFC antenna and a mobile terminal, the magnetic sheet is pasted on the front and back surfaces of the substrate, so that the problem of magnetic line offset caused by too close distance and opposite current of the wires in the substrate can be avoided, thereby facilitating the miniaturization of the NFC antenna and saving the cost; moreover, the diameter of partial wires in the useful area of the substrate is designed to be larger, the diameter of partial wires in the useless area is designed to be smaller, the magnetic line strength and the area of the useful area can be further enhanced by matching with the magnetic sheet, the magnetic line strength and the area of the useless area are reduced, and the working efficiency of the NFC antenna is improved; furthermore, the utility model discloses NFC antenna can be better realize standardized, is favorable to mobile terminal's market promotion, has higher economic value.
In order to achieve the above object, in a first aspect, the present invention provides an NFC antenna, including a substrate and a coil formed by winding a wire, wherein the coil is embedded inside the substrate, and when the NFC antenna is powered on, a current direction of one side of the coil is opposite to a current direction of the other side of the coil;
the NFC antenna further comprises a first magnetic sheet and a second magnetic sheet which are respectively attached to the front surface and the back surface of the substrate, wherein the first magnetic sheet covers all wires in a first area on the front surface of the substrate, and the second magnetic sheet covers all wires in a second area on the back surface of the substrate; the first region at least comprises a region formed by the innermost conducting wire in one side of the coil and vertically extending to the outermost conducting wire on the basis of the innermost conducting wire, and the second region at least comprises a region formed by the innermost conducting wire in the opposite side of the coil and vertically extending to the outermost conducting wire on the basis of the innermost conducting wire.
In some embodiments, the wire diameter on one side of the coil is smaller than the wire diameter on the opposite side.
In some embodiments, a projection of the first magnetic sheet on the substrate is non-coincident with a projection of the second magnetic sheet on the substrate.
In some embodiments, a projection of the first magnetic sheet on the substrate at least partially coincides with a projection of the second magnetic sheet on the substrate.
In some embodiments, the coil is a planar quadrifilar helix coil or a planar circular helix coil. .
In some embodiments, the coil includes a positive terminal and a negative terminal.
In some embodiments, the substrate is rectangular, circular, triangular, or irregularly shaped.
In a second aspect, the present invention provides a mobile terminal including the above NFC antenna.
In some embodiments, the NFC antenna is located above a metal material, plastic, or battery in the mobile terminal.
The beneficial effect that above-mentioned technical scheme brought lies in:
1. the utility model attaches two independent magnetic sheets on the front and back surfaces of the substrate, which can avoid the problem of magnetic line offset caused by too close distance between the wires at two opposite sides in the substrate and opposite current directions at two opposite sides when the substrate is electrified, thereby facilitating the miniaturization of the NFC antenna and saving the cost;
2. the utility model discloses a partial wire diameter of useful region designs great, partial wire diameter of useless region designs less in the base plate, can further cooperate the magnetic sheet to realize the enhancement of magnetic line of force intensity, the area in useful region, and the reduction of magnetic line of force intensity, the area in useless region has improved the work efficiency of NFC antenna;
3. the utility model discloses realization that can be better is standardized, is favorable to mobile terminal's marketing, has higher economic value.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a top view of an NFC antenna in an embodiment of the invention;
fig. 2 is a bottom view of an NFC antenna in an embodiment of the present invention;
fig. 3 is a schematic diagram of the direction of magnetic lines of force after the conventional NFC antenna is powered on;
fig. 4 is a schematic structural diagram of a coil according to an embodiment of the present invention;
fig. 5 is a schematic structural view of the first magnetic sheet and the second magnetic sheet according to an embodiment of the present invention;
fig. 6 is a schematic structural view of a first magnetic sheet and a second magnetic sheet according to another embodiment of the present invention;
fig. 7 is a top view of an NFC antenna in another embodiment of the invention;
fig. 8 is a bottom view of an NFC antenna in another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the following description will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be understood that the terms "X axis", "Y axis", "Z axis", "vertical", "parallel", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The utility model provides a NFC antenna, as shown in fig. 1 and fig. 2, the NFC antenna comprises a substrate 1 and a coil 2 formed by winding a wire; the coil 2 is embedded in the substrate 1, and the NFC antenna further comprises a first magnetic sheet 3 and a second magnetic sheet 4 which are independent;
the first magnetic sheet 3 and the second magnetic sheet 4 are respectively attached to the front surface and the back surface of the substrate 1, the first magnetic sheet 3 covers all conducting wires in a first area on the front surface of the substrate 1, and the second magnetic sheet 4 covers all conducting wires in a second area on the back surface of the substrate 1; the first region at least comprises a region formed by the innermost conductor wire in one side of the coil 2 extending vertically to the outermost conductor wire on the basis of the innermost conductor wire, and the second region at least comprises a region formed by the innermost conductor wire in the other side of the coil 2 extending vertically to the outermost conductor wire on the basis of the innermost conductor wire.
When the magnetic field generating device is powered on, the current direction of one side of the coil 2 is opposite to the current direction of the other side, so that the directions of magnetic field lines generated by the two opposite sides are opposite, when the first magnetic sheet 3 is attached to the first area on the front surface of the substrate 1, and the second magnetic sheet 4 is attached to the second area on the back surface of the substrate 1, the magnetic field lines can radiate in different directions, and therefore the counteracting effect of the magnetic field lines generated by the opposite directions can be avoided.
Fig. 3 is a schematic diagram illustrating magnetic lines of force generated by a coil when a magnetic sheet is attached to a side of a conventional magnetic sheet. As can be seen from fig. 3, in the conventional NFC antenna, since the distance between the internal wires of the substrate is too close and the currents are opposite, the magnetic lines of force are largely cancelled (the magnetic lines of force in the dotted line represent non-existence).
The utility model discloses cover two independent magnetic sheet subsides at base plate 1's positive and negative, can avoid the wire of the relative both sides of 1 inside coil of base plate because of the distance too closely and the problem that the magnetic line of force that leads to when circular telegram the current opposite direction of relative both sides offsets to be convenient for the miniaturization of NFC antenna, save the cost.
In one embodiment, the wire diameter of one side of the coil 2 is smaller than the wire diameter of the other side.
Specifically, as shown in fig. 4, in this embodiment, the diameter of the wire in the useful region of the substrate 1 is designed to be larger, and the diameter of the wire in the useless region is designed to be smaller, so that the strength and area of the magnetic force lines in the useful region can be further increased in cooperation with the magnetic sheet, and the strength and area of the magnetic force lines in the useless region can be reduced, so that only the conduction function is performed, thereby improving the operating efficiency of the NFC antenna.
In one embodiment, as shown in fig. 5, the projection of the first magnet sheet 3 on the substrate 1 is not overlapped with the projection of the second magnet sheet 4 on the substrate 1.
In this embodiment, after energization, the magnetic lines of force passing through the first magnetic sheet 3 and the magnetic lines of force passing through the second magnetic sheet 4 radiate in different directions, respectively, and there is no cancellation of the magnetic lines of force.
In another embodiment, as shown in fig. 6, the projection of the first magnet sheet 3 on the substrate 1 and the projection of the second magnet sheet 4 on the substrate 1 at least partially coincide.
In this embodiment, after energization, the magnetic lines of force passing through the first magnetic sheet 3 and the magnetic lines of force passing through the second magnetic sheet 4 radiate in different directions, respectively, and there is no cancellation of the magnetic lines of force; in addition, the anti-interference capability of the NFC antenna at this time is strong, and when high requirements are placed on the accuracy and the anti-interference capability of the NFC antenna, the embodiment can be adopted.
In one embodiment, the coil 2 is a planar quadrifilar helix coil or a planar circular helix coil.
As shown in any one of fig. 1, 2, 4-6, a planar quadrifilar spiral coil is shown. The plane quadrilateral is more favorable to the miniaturization of the NFC antenna, and after the design, the NFC antenna has higher performances such as efficiency and gain.
As shown in fig. 7 and 8, a schematic structural diagram of an NFC antenna with a planar circular spiral coil is shown.
When the coil 2 is a planar circular spiral coil, the first magnetic sheet 3 and the second magnetic sheet 4 are respectively attached to the front surface and the back surface of the substrate 1, the first magnetic sheet 3 covers all the wires in a first area on the front surface of the substrate 1, and the second magnetic sheet 4 covers all the wires in a second area on the back surface of the substrate 1; the first region at least comprises a region formed by the innermost conductor wire in one side of the coil 2 extending vertically to the outermost conductor wire on the basis of the innermost conductor wire, and the second region at least comprises a region formed by the innermost conductor wire in the opposite side of the coil 2 extending vertically to the outermost conductor wire on the basis of the innermost conductor wire.
Specifically, the first region includes at least a region formed by extending two end points of the diameter of the innermost conductor to the outermost conductor on one side of the coil 2 with the innermost conductor as a reference; the second region includes at least a region formed by extending both end points of the diameter of the innermost wire to the outermost wire with reference to the innermost wire in the other side of the coil 2.
In one embodiment, the coil 2 includes a positive terminal and a negative terminal.
In this real-time mode, since the coil 2 needs to be energized to generate current and further generate magnetic lines of force, the first and second ends of the coil 2 are respectively provided with a positive terminal and a negative terminal and connected to a power supply.
In one embodiment, the substrate 1 is rectangular, circular, triangular or irregular.
In this embodiment, the shape of the substrate 1 is not limited, and the substrate 1 can be adapted to any terminal device, thereby satisfying the diversity requirement.
In one embodiment, a mobile terminal is provided that includes the NFC antenna described above.
The mobile terminal can be a 3G/4G/5G mobile phone, and the NFC antenna is adopted by the mobile terminal to achieve the functions of quick payment, point-to-point information interaction and the like.
In addition, in the NFC antenna, the magnetic sheet is attached to the front surface and the back surface of the substrate 1, so that the magnetic sheet can further isolate the absorption of the metal material to the magnetic field of the NFC antenna when being applied to a mobile terminal, and increase the magnetic field intensity of the antenna, thereby effectively increasing the communication induction distance.
In one of the embodiments, the NFC antenna is located above a metal material, plastic, or battery in the mobile terminal.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (9)
1. An NFC antenna comprises a substrate and a coil formed by winding a conducting wire, and is characterized in that the coil is embedded in the substrate, and when the NFC antenna is electrified, the current direction of one side of the coil is opposite to the current direction of the other side of the coil;
the NFC antenna further comprises a first magnetic sheet and a second magnetic sheet which are respectively attached to the front surface and the back surface of the substrate, wherein the first magnetic sheet covers all wires in a first area on the front surface of the substrate, and the second magnetic sheet covers all wires in a second area on the back surface of the substrate; the first region at least comprises a region formed by the innermost conducting wire in one side of the coil and vertically extending to the outermost conducting wire on the basis of the innermost conducting wire, and the second region at least comprises a region formed by the innermost conducting wire in the opposite side of the coil and vertically extending to the outermost conducting wire on the basis of the innermost conducting wire.
2. The NFC antenna of claim 1, wherein a diameter of the wire on one side of the coil is smaller than a diameter of the wire on an opposite side.
3. An NFC antenna according to claim 1 or 2 wherein the projection of the first magnetic patch on the substrate is non-coincident with the projection of the second magnetic patch on the substrate.
4. An NFC antenna according to claim 1 or 2 wherein the projection of the first magnetic sheet on the substrate at least partially coincides with the projection of the second magnetic sheet on the substrate.
5. NFC antenna according to claim 1 or 2, characterized in that the coil is a planar four-sided spiral coil or a planar circular spiral coil.
6. The NFC antenna of claim 5, wherein the coil includes a positive terminal and a negative terminal.
7. NFC antenna according to claim 1 or 2, characterized in that the substrate is rectangular, circular or triangular.
8. A mobile terminal characterized in that it comprises an NFC antenna according to any one of claims 1 to 7.
9. The mobile terminal of claim 8, wherein the NFC antenna is located in the mobile terminal above a metal material, plastic, or battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920759851.2U CN210092331U (en) | 2019-05-24 | 2019-05-24 | NFC antenna and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920759851.2U CN210092331U (en) | 2019-05-24 | 2019-05-24 | NFC antenna and mobile terminal |
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| Publication Number | Publication Date |
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| CN210092331U true CN210092331U (en) | 2020-02-18 |
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| CN201920759851.2U Active CN210092331U (en) | 2019-05-24 | 2019-05-24 | NFC antenna and mobile terminal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110247166A (en) * | 2019-05-24 | 2019-09-17 | 禾邦电子(苏州)有限公司 | A kind of NFC antenna and mobile terminal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110247166A (en) * | 2019-05-24 | 2019-09-17 | 禾邦电子(苏州)有限公司 | A kind of NFC antenna and mobile terminal |
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