Antenna structure and loop device

Abstract

This specification provides one or more embodiments of an antenna structure and a ring-shaped device. The antenna structure includes: a substrate ring; an antenna coil disposed circumferentially on the substrate ring, the antenna coil having a ring antenna sensing region and a planar antenna sensing region, the magnetic field direction of the ring antenna sensing region being arranged along the axial direction of the substrate ring, and the magnetic field direction of the planar antenna sensing region being parallel to a plane perpendicular to the axial direction.

Description

TECHNICAL FIELD

[0001] One or more embodiments of the present specification relate to the technical field of terminals, and in particular to an antenna structure and a ring device. BACKGROUND

[0002] In the related art, NFC (Near Field Communication) technology has been widely applied in the current production and life, and NFC ring products have become a popular product for applying NFC technology due to their practicability and portability.

[0003] At present, a conventional NFC ring is usually configured with an NFC antenna and a card reader for near field communication. However, the NFC ring on the market is usually configured with a single planar antenna or a single ring antenna. The planar antenna has a limited identification area, and the ring antenna has a large blind area in the middle of the card reader. Both of the two schemes have great defects. SUMMARY

[0004] Therefore, one or more embodiments of the present specification provide the following technical solutions. According to a first aspect of one or more embodiments of the present specification, an antenna structure is provided, comprising: a substrate ring; an antenna coil, disposed on the substrate ring along a circumferential direction of the substrate ring, the antenna coil being provided with a ring antenna induction area and a planar antenna induction area, a magnetic field direction of the ring antenna induction area being disposed along an axial direction of the substrate ring, and a magnetic field direction of the planar antenna induction area being parallel to a plane perpendicular to the axial direction.

[0005] Optionally, the antenna structure comprises a plurality of antenna coils disposed along the axial direction of the substrate ring at intervals, and the plurality of antenna coils are sequentially electrically connected. Among the plurality of antenna coils, part of the antenna coils expand outward along the axial direction in a first direction, and part of the antenna coils expand outward along the axial direction in a second direction, so as to form an interval area as the planar antenna induction area between two adjacent antenna coils, and the first direction and the second direction are opposite.

[0006] Optionally, the number of the antenna coils is even, and the number of the antenna coils expanding outward along the axial direction in the first direction is equal to the number of the antenna coils expanding outward along the axial direction in the second direction.

[0007] Optionally, the antenna coil comprises a first antenna coil, the first antenna coil comprises a first line segment area, a second line segment area and a surrounding area, the surrounding area is electrically connected with the first line segment area and the second line segment area respectively, and the first line segment area and the second line segment area are disposed around the axial direction of the substrate ring to form the ring antenna induction area. The surrounding region is radially arranged around the substrate ring to form the planar antenna sensing region.

[0008] Optionally, the antenna coil further includes at least one second antenna coil, each second antenna coil having a first trace segment, a second trace segment and a third trace segment, the third trace segment being connected between the first trace segment and the second trace segment; The first trace segment and the first trace area are spaced apart along the axial direction of the substrate ring, the second trace segment and the second trace area are spaced apart along the axial direction of the substrate ring, and the third trace segment and the surrounding area are spaced apart along the axial direction of the substrate ring. Both the first trace segment and the second trace segment are bent relative to the third trace segment to avoid the surrounding area.

[0009] Optionally, in the axial direction, the second antenna coil is located on the same side as the first antenna coil.

[0010] Optionally, the first antenna coil forms one or more of the surrounding regions.

[0011] Optionally, the antenna coil may consist of only a single first antenna coil.

[0012] Optionally, the antenna coil includes a plurality of antenna coils spaced apart in the axial direction, each antenna coil including a first solder point and a second solder point, wherein when the substrate ring is unfolded, the plurality of first solder points are located on the same side and the plurality of second solder points are located on the same side; In the direction parallel to the axis from bottom to top, the second solder point of the antenna coil is electrically connected to the first solder point of the antenna coil located above and adjacent to it. The first solder point of one of the two outermost antenna coils and the second solder point of the other antenna coil serve as the connection contact point of the antenna structure.

[0013] According to a second aspect of one or more embodiments of this specification, a ring-shaped device is provided, comprising: Ring-shaped outer shell; In the antenna structure described in any of the foregoing embodiments, the substrate ring is disposed inside the annular housing.

[0014] Optionally, it also includes a circuit board and a battery, the circuit board and the battery being electrically connected, and the circuit board and the battery being disposed on the inner side of the annular housing along the circumference of the annular housing. The antenna structure is partially disposed between the circuit board and the annular housing and partially disposed between the annular housing and the battery. The planar antenna sensing area is spaced apart from the battery in the circumferential direction of the ring-shaped device.

[0015] Optionally, the ring-shaped device includes a ring band.

[0016] As can be seen from the above embodiments, this specification combines the advantages of planar antenna sensing areas and loop antenna sensing areas by setting planar antenna sensing areas and loop antenna sensing areas on the substrate ring of the same antenna structure, while weakening the defects of a single antenna form, improving the communication efficiency of the antenna structure, and increasing the success rate of the loop device configured with this antenna structure being identified by the other end. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an antenna structure provided in an exemplary embodiment.

[0018] Figure 2 This is an illustrated diagram of an antenna structure provided in an exemplary embodiment.

[0019] Figure 3 This is a schematic diagram of another antenna structure provided in an exemplary embodiment.

[0020] Figure 4 This is a schematic diagram of another antenna structure provided in an exemplary embodiment.

[0021] Figure 5 This is a schematic diagram of another antenna structure provided in an exemplary embodiment.

[0022] Figure 6 This is a schematic diagram of another antenna structure provided in an exemplary embodiment.

[0023] Figure 7 This is a schematic diagram of the structure of a ring-shaped device provided in an exemplary embodiment.

[0024] Figure 8 This is an exemplary embodiment of a schematic diagram of the unfolded ring-shaped device. Detailed Implementation

[0025] Figure 1 This is a schematic diagram of an antenna structure provided in an exemplary embodiment. Figure 2 This is a schematic diagram of an antenna structure provided in an exemplary embodiment. For example... Figure 1 , Figure 2 As shown, the antenna structure includes a substrate ring 1 and an antenna coil 2. The antenna coil 2 is disposed on the substrate ring 1 along the axial direction of the substrate ring 1. The substrate ring 1 can be an insulating dielectric layer, and the antenna coil 2 is a metal disposed on the substrate ring 1, such as a copper strip, an aluminum strip, or a metal strip of other materials. This antenna structure can be a circuit board antenna structure or a laser-formed antenna structure, which can be designed according to needs.

[0026] The antenna coil 2 is provided with a loop antenna sensing area 100 and a planar coil sensing area 200. The magnetic field direction of the loop antenna sensing area 100 is set along the axial direction of the substrate ring 1. In this way, communication between the antenna coil 2 and the card reader can be realized by aligning the axial direction of the substrate ring 1 perpendicular to the card reader's reading plane. The magnetic field direction of the planar coil sensing area 200 is parallel to the plane perpendicular to the axial direction of the substrate ring 1. That is, it can be understood that the magnetic field direction of the planar coil sensing area 200 is basically set along the radial direction of the substrate ring 1. Since the surfaces of the substrate ring 1 are all arc-shaped, and the planar coil sensing area 200 is set on the arc-shaped surface of the substrate ring 1, the magnetic field direction at each position of the planar coil sensing area 100 is not strictly parallel, but is set along the radial direction of the substrate ring 1, that is, it can be parallel to the plane perpendicular to the axial direction of the substrate ring 1.

[0027] Based on this, a planar antenna sensing area 200 and a loop antenna sensing area 100 are respectively provided on the substrate ring 1 of the same antenna structure. This combines the advantages of both the planar antenna sensing area 200 and the loop antenna sensing area 100, while mitigating the shortcomings of a single antenna form, improving the communication efficiency of the antenna structure, and increasing the success rate of the loop device configured with this antenna structure being identified by the other end. The same antenna structure may include a single antenna coil 2 or multiple antenna coils 2, where each antenna coil 2 can form a current loop around the axis. This antenna coil 2 can be an NFC antenna coil.

[0028] In some embodiments, such as Figure 2 As shown, the antenna structure includes a plurality of antenna coils 2 spaced apart along the axial direction of the substrate ring 1. For example, Figure 2 The vertical direction shown is the axial direction of the substrate ring 1. This antenna structure includes four antenna coils 2, which are spaced apart along the vertical direction and electrically connected. Current flows through these antenna coils 2 in a predetermined direction around the axial direction of the substrate ring 1. Some of the antenna coils 2 extend outwards along the axial direction in a first direction, while others extend outwards along the axial direction in a second direction. This creates a spacer region between adjacent antenna coils 2, serving as the sensing area of ​​a planar antenna. The first and second directions are opposite. This design only requires changes in position and shape to the existing loop antenna, resulting in low design cost and ease of implementation.

[0029] Furthermore, the number of antenna coils is even, and the number of antenna coils 2 extending outward along the axial direction in the first direction is equal to the number of antenna coils 2 extending outward along the axial direction in the second direction. For example, such as... Figure 2As shown, the antenna structure includes four antenna coils 2, where two antenna coils 2 expand outward from bottom to top, and the other two antenna coils 2 expand outward from top to bottom. In this way, the two regions on both sides of the substrate ring 1 in the axial direction can be used as the occupied regions for the outward expansion of the antenna coils 2 respectively, improving the aesthetics.

[0030] In various embodiments of this specification, when the antenna structure includes multiple antenna coils, in order to reduce the mutual cancellation of the magnetic fields between two adjacent antenna coils 2, still Figure 2 As shown, each antenna coil 2 includes a first solder joint 21 and a second solder joint 22, and when the substrate ring 1 is in the unfolded state, multiple first solder joints 21 are located on the same side, and multiple second solder joints 22 are located on the same side. For example Figure 2 in which all four first solder joints are located on the left side, and all four second solder joints 22 are located on the right side. In the direction parallel to the axial direction and from bottom to top, the second solder joint 22 of an antenna coil is electrically connected to the first solder joint of the adjacent antenna coil 2 above it, and the first solder joint 21 of one of the two outermost antenna coils and the second solder joint of the other antenna coil 2 serve as the connection contacts of the antenna structure, and these connection contacts can be electrically connected to an excitation source or electrically connected to a tuning circuit.

[0031] Taking Figure 3 As shown, taking the direction from bottom to top as an example, the first solder joint 21 on the leftmost is conducted with the second solder joint 22 on the rightmost of the same antenna coil 2, the second solder joint 22 on the rightmost is electrically connected to the first solder joint 21 on the left second, the second solder joint 22 on the right second is electrically connected to the first solder joint 21 on the left third, the second solder joint 22 on the right third is electrically connected to the first solder joint 21 on the left fourth, and the first solder joint 21 on the leftmost and the second solder joint 22 on the right fourth can serve as the connection contacts of the antenna structure. In this way, the current directions along the axial direction of the substrate ring 1 on the four antenna coils 2 are the same, so that the magnetic field directions can be superimposed, enhancing the magnetic field intensity, reducing the magnetic field cancellation, and improving the recognition success rate.

[0032] In some embodiments, such as Figure 3 As shown, the antenna coil 2 includes a first antenna coil 23, and the first antenna coil 23 includes a first segment area 231, a second segment area 232, and a surrounding area 233, and the surrounding area 233 is electrically connected to the first segment area 231 and the second segment 232 respectively. Among them, the first segment area 231 and the second segment area 232 are respectively arranged around the axial direction of the substrate ring 1, so as to form a ring antenna induction area 100, and the surrounding area 233 can be arranged around the radial direction of the substrate ring 1 to form a planar antenna induction area 200. In this way, the structure of the surrounding area 233 can increase the area and magnetic field intensity of the planar antenna induction area 200, and the first antenna coil 23 simultaneously forms the planar antenna induction area 200 and the ring antenna induction area 100, with a simple structure.

[0033] Furthermore, such as Figure 4 As shown, a single surrounding region 233 can be formed through the first antenna coil 23, or as... Figure 5 and Figure 4 As shown, multiple surrounding areas 233 can be formed through the first antenna coil 23, thereby increasing the area of ​​the planar antenna sensing area 200 and improving the communication effect. For example, two surrounding areas 233 can be formed. Of course, if the size is sufficient, three or more surrounding areas 233 can be set as needed. Specifically, the design can be adapted according to the area ratio of the loop antenna sensing area 100 and the planar antenna sensing area 200.

[0034] like Figure 4 As shown, the current flows in opposite directions on two adjacent surrounding regions 233; for example, one flows counterclockwise and the other clockwise. Thus, as... Figure 4 As shown, two adjacent surrounding regions 233 are arranged along the axial direction and the current directions on two adjacent line segments are the same, for example... Figure 5 The right-side line segment of the left-side encircling region 233, which is arranged along the axial direction, and the left-side line segment of the right-side encircling region 233, which is arranged along the axial direction, have the same current flow direction. This can reduce the magnetic field cancellation between the two encircling regions 233, which is beneficial to improving the recognition success rate of the planar antenna sensing area 200.

[0035] like Figure 5 As shown, the current flows in the same direction in two adjacent surrounding regions 233, for example, the current flows in either a counterclockwise or clockwise direction in both surrounding regions 233. Thus, as... Figure 5 As shown, the current directions on the line segments perpendicular to the axis in two adjacent surrounding regions 233 are the same, for example... Figure 6 The current flows from right to left on the line segment perpendicular to the axis in the left-hand surrounding region 233, and from right to left on the line segment perpendicular to the axis in the right-hand surrounding region 233. This reduces the magnetic field cancellation between the two surrounding regions 233, which helps improve the recognition success rate of the planar antenna sensing area 200.

[0036] In some embodiments, the same antenna structure may include only a single first antenna coil 23. This allows sufficient space for the planar antenna sensing area 200, improving its sensing performance, since the axially smaller area occupied by the loop antenna sensing region 200 is less. In other embodiments, such as... Figure 6 As shown, the antenna structure also includes at least one second antenna coil 24, for example... Figure 6As shown, the antenna structure includes three second antenna coils 24. Each second antenna coil 24 includes a first trace 241, a second trace 242, and a third trace 243. The third trace 243 connects the first trace 241 and the second trace 242. The first trace 241 and the first trace area 231 are spaced apart along the axial direction of the elongated substrate. The second trace 242 and the second trace area 232 are spaced apart along the axial direction of the elongated substrate. The third trace 243 and the surrounding area 233 are spaced apart along the axial direction of the substrate ring 1. Both the first trace 241 and the second trace 242 are bent relative to the first trace 241, thereby creating space to avoid the surrounding area 233 and preventing short circuits caused by contact between adjacent antenna segments. The arrangement of the second antenna coils 24 helps to increase the magnetic field strength of the loop antenna sensing area 100, improve the communication performance between the loop antenna sensing area 100 and the opposite end, and improve the recognition rate.

[0037] The surrounding area 233 can be located between the third trace segment 243 of the two second second-day coils 24, or as follows: Figure 6 As shown, the second antenna coil 24 is located on the same side as the first antenna coil 23, and is larger than... Figure 7 As shown, along the axial direction from bottom to top, the first antenna coil 23 is located at the top, and the second antenna coils 24 are all located below the first antenna coil 23. Compared with the scheme where the surrounding area 233 is located between the third routing segments 243 of the two second antenna coils 24, since this scheme is only adjacent to a single third routing segment 243, the magnetic field cancellation effect caused by the mutual influence between the surrounding area 233 and the adjacent third routing segment 243 can be reduced.

[0038] Based on the technical solutions in this specification, such as Figure 8 As shown, a ring-shaped device is also provided, which includes a ring-shaped housing 300 and an antenna structure shown in any of the foregoing embodiments, with the substrate ring disposed inside the ring-shaped housing 300. Thus, by configuring the ring antenna sensing area 100 and the ring antenna sensing area 200, the communication efficiency of the ring-shaped device can be improved, and the success rate of the ring-shaped device being read by the card reader can be increased.

[0039] In some embodiments, such as ​As shown, the ring-shaped device also includes a circuit board 400 and a battery 500. The circuit board 400 and battery 500 are arranged circumferentially on the inner side of the ring-shaped housing 300. The antenna structure is partially disposed between the circuit board 400 and the ring-shaped housing 300, and partially disposed between the ring-shaped housing 300 and the battery 500. Furthermore, the planar antenna sensing area 200 and the battery 500 are spaced apart circumferentially on the ring-shaped device. This reduces the shielding effect of the magnetic field of the battery 500 on the planar antenna sensing area 200, thereby improving the communication effect between the planar antenna sensing area 200 and the card reader.

[0040] The ring-shaped device can include rings and bracelets, such as NFC rings or NFC bracelets.

Claims

1. An antenna structure, characterized in that, include: Substrate ring; An antenna coil is disposed circumferentially on the substrate ring. The antenna coil has a loop antenna sensing area and a planar antenna sensing area. The magnetic field direction of the loop antenna sensing area is arranged along the axial direction of the substrate ring, and the magnetic field direction of the planar antenna sensing area is parallel to a plane perpendicular to the axial direction.

2. The antenna structure according to claim 1, characterized in that, The antenna structure includes a plurality of antenna coils spaced apart along the axial direction of the substrate ring, and the plurality of antenna coils are electrically connected in sequence. Among the plurality of antenna coils, some antenna coils expand outward along the axial direction in a first direction, and some antenna coils expand outward along the axial direction in a second direction, so as to form an interval region between two adjacent antenna coils as the induction area of ​​the planar antenna, wherein the first direction and the second direction are opposite.

3. The antenna structure according to claim 2, characterized in that, The number of antenna coils is even, and the number of antenna coils expanding outward along the axial direction in the first direction is equal to the number of antenna coils expanding outward along the axial direction in the second direction.

4. The antenna structure according to claim 1, characterized in that, The antenna coil includes a first antenna coil, which includes a first segment region, a second segment region, and a surrounding region. The surrounding region is electrically connected to the first segment region and the second segment region, respectively. The first segment region and the second segment region are both arranged around the axial direction of the substrate ring to form the ring antenna sensing region. The surrounding region is radially arranged around the substrate ring to form the planar antenna sensing region.

5. The antenna structure according to claim 4, characterized in that, The antenna coil further includes at least one second antenna coil, and each second antenna coil is provided with a first trace segment, a second trace segment and a third trace segment, wherein the third trace segment is connected between the first trace segment and the second trace segment; The first trace segment and the first trace area are spaced apart along the axial direction of the substrate ring, the second trace segment and the second trace area are spaced apart along the axial direction of the substrate ring, and the third trace segment and the surrounding area are spaced apart along the axial direction of the substrate ring. Both the first trace segment and the second trace segment are bent relative to the third trace segment to avoid the surrounding area.

6. The antenna structure according to claim 5, characterized in that, In the axial direction, the second antenna coil is located on the same side as the first antenna coil.

7. The antenna structure according to claim 4, characterized in that, The first antenna coil forms one or more of the aforementioned surrounding regions.

8. The antenna structure according to claim 4, characterized in that, The antenna coil consists of only a single first antenna coil.

9. The antenna structure according to claim 1, characterized in that, The antenna coil includes a plurality of antenna coils spaced apart in the axial direction. Each antenna coil includes a first solder point and a second solder point. When the substrate ring is unfolded, the plurality of first solder points are located on the same side and the plurality of second solder points are located on the same side. In the direction parallel to the axis from bottom to top, the second solder point of the antenna coil is electrically connected to the first solder point of the antenna coil located above and adjacent to it. The first solder point of one of the two outermost antenna coils and the second solder point of the other antenna coil serve as the connection contact point of the antenna structure.

10. A ring-shaped device, characterized in that, include: Ring-shaped outer shell; In the antenna structure according to any one of claims 1-9, the substrate ring is disposed on the inner side of the annular outer shell.

11. The annular device according to claim 10, characterized in that, It also includes a circuit board and a battery, which are electrically connected. The circuit board and the battery are disposed on the inner side of the annular housing along the circumference of the annular housing. The antenna structure is partially disposed between the circuit board and the annular housing and partially disposed between the annular housing and the battery. The planar antenna sensing area is spaced apart from the battery in the circumferential direction of the ring-shaped device.

12. The annular device according to claim 10, characterized in that, The ring-shaped device includes a ring band.

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