Antenna structure and electronic equipment

Abstract

The utility model discloses an antenna structure and electronic equipment, and belongs to the technical field of electronic equipment. The antenna structure comprises a first structure layer and a coil feed point structure; the first structural layer comprises a first base material layer and a first coil layer, the first base material layer comprises a first end part, a main body part and a second end part, the first coil layer is provided with a first connecting end part and a second connecting end part, the first connecting end part is positioned on the first end part, and the second connecting end part is positioned on the second end part; the coil feed point structure is electrically connected with the first coil layer; and the first connecting end part is fixedly connected with the second connecting end part, so that the first structural layer forms a closed pattern in a surrounding manner. The electronic equipment comprises the decorating part and the antenna structure, and at least part of the antenna structure is attached to the cavity wall of the containing cavity of the decorating part. According to the invention, the problem that the antenna structure in a three-dimensional and closed shape cannot be formed through direct cutting in the prior art is solved.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to an antenna structure and electronic equipment. Background Art

[0002] Electronic devices, such as tablet computers and mobile phones, are equipped with antenna structures, such as NFC (Near Field Communication) antennas. NFC antennas are used to receive and send NFC signals, and they use high-frequency radio waves to achieve data transmission and interconnection between devices. In electronic devices, NFC antennas are usually embedded in the back of mobile phones or under the screen. These antennas can communicate with other devices that support NFC technology within a very short distance (usually a few centimeters), such as payment terminals, smart door locks, etc. When the NFC antenna is made of a flexible printed circuit board, when NFC is a two-dimensional planar structure, it is necessary to set a planar area in the internal space of the mobile phone to install the planar NFC antenna, but in this way, its installation path in the mobile phone will be constrained and will affect the installation of other components. For this reason, the NFC antenna is designed as a non-planar three-dimensional structure and fits in the uneven internal space of the mobile phone. However, since the NFC antenna is in the shape of a closed curve, it is impossible to directly cut it into a three-dimensional and closed shape when manufacturing the NFC antenna. Utility Model Content

[0003] The present application provides an antenna structure and an electronic device to solve the technical problem that when manufacturing antenna structures such as NFC antennas, it is impossible to directly cut them into a three-dimensional and closed shape.

[0004] The technical solution is as follows:

[0005] A first aspect of the present application provides an antenna structure, which includes: a first structure layer and a coil feed point structure;

[0006] The first structural layer includes a first substrate layer and a first coil layer, the first substrate layer and the first coil layer are stacked, the first substrate layer includes a first end, a main body, and a second end, the first end, the main body, and the second end are arranged along the length direction of the first substrate layer, the first end is connected to one end of the main body, and the second end is connected to the other end opposite to the main body, the first coil layer has a first connection end and a second connection end, the first connection end is located on the first end, and the second connection end is located on the second end;

[0007] The coil feed point structure is electrically connected to the first coil layer;

[0008] The first connection end portion is fixedly connected to the second connection end portion so that the first structural layer forms a closed figure, and the first substrate layer has a first contour edge, which is a three-dimensional curve.

[0009] By adopting the above scheme, after the shape of the first structural layer is cut out on the planar semi-finished circuit board, the first substrate layer has a first end and a second end that are not directly connected, and the first connection end and the second connection end of the first coil layer are not connected. At this time, the first structural layer is in an open form, that is, the first structural layer is in a non-closed shape, and then the first connection end and the second connection end are fixedly connected, so that the first structural layer forms a closed shape, thereby solving the problem in the related art that the antenna structure cannot be directly cut to form a three-dimensional and closed shape.

[0010] In some implementations, the first structural layer has a first strip region and a second strip region that are spaced apart, the first strip region is a three-dimensional structure, and the second strip region is a planar structure;

[0011] The first contour edge is located in the first strip area.

[0012] By adopting the above scheme, for the antenna structure, the first contour edge in the form of a three-dimensional curve is set on the first strip area of ​​the three-dimensional structure. On the one hand, it is convenient to manufacture the antenna structure, reduce the fixed connection points of the antenna structure, and ensure the stability of the performance of the antenna structure. On the other hand, it is convenient to adapt the antenna structure to the installation position on the electronic device.

[0013] In some implementations, the length of the first strip area is greater than the length of the second strip area.

[0014] By adopting the above solution, the length of the first strip area is greater than that of the second strip area, so that the first strip area can be attached to a space with a height difference in the electronic device, so that the antenna structure can reasonably utilize the installation space in the electronic device.

[0015] In some implementations, the first end portion, the main body portion, and the second end portion are an integral structure, and the main body portion includes a first sub-segment and a second sub-segment;

[0016] The first end portion and the second end portion each have an opposite connecting end and a free end;

[0017] The connection end of the first end is connected to the first sub-segment, and the connection end of the second end is connected to the second sub-segment.

[0018] By adopting the above scheme, the first end, the main body and the second end are an integrated structure, so that the first substrate layer can have two free ends, namely the free end of the first end and the free end of the second end, which reduces the connection position of the first substrate layer, and the first coil layer and the first substrate layer are stacked, which is conducive to ensuring the overall structural strength of the antenna structure and the stability of the performance.

[0019] In some implementations, the first end and the second end are disposed in the second strip region.

[0020] By adopting the above scheme, since the first connecting end is on the first end and the second connecting end is on the second end, the positions of the first end and the second end on the first structural layer are limited, and the required first structural layer can be cut out on the semi-finished circuit board in different ways.

[0021] In some implementations, the first end portion is non-parallel to the first sub-segment, the second end portion is non-parallel to the second sub-segment, a direction from the connecting end of the first end portion to the free end of the first end portion is a first direction, and a direction from the connecting end of the second end portion to the free end of the second end portion is a second direction;

[0022] The orientation of the first direction is the same as the orientation of the second direction, or the orientation of the first direction is opposite to the orientation of the second direction.

[0023] By adopting the above scheme, when the first end and the second end are respectively arranged in a non-parallel manner with respect to different sub-segment length directions of the main body, the relationship between the orientations of the first direction and the second direction can be arranged as needed to meet the actual design requirements of the antenna structure.

[0024] In some implementations, the first end is arranged in parallel with the first sub-segment, and the second end is arranged in parallel with the second sub-segment.

[0025] By adopting the above solution, the first end and the second end are respectively arranged in parallel with the length directions of different sub-segments of the main body to meet the actual design requirements of the antenna structure.

[0026] In some implementations, the first end and the second end are disposed in the first strip region.

[0027] By adopting the above scheme, since the first connecting end is on the first end and the second connecting end is on the second end, the positions of the first end and the second end on the first structural layer are limited, and the required first structural layer can be cut out on the semi-finished circuit board in different ways.

[0028] In some implementations, the first end is non-parallel to the first subsection, and the second end is non-parallel to the second subsection;

[0029] The direction from the connecting end of the first end to the free end of the first end is the first direction, and the direction from the connecting end of the second end to the free end of the second end is the second direction;

[0030] The first direction is opposite to the second direction.

[0031] By adopting the above solution, the orientations of the first direction and the second direction are opposite to each other, so as to meet the actual design requirements of the antenna structure.

[0032] In some implementations, the first end portion is non-parallel to the first sub-segment, the second end portion is non-parallel to the second sub-segment, a direction from the connecting end of the first end portion to the free end of the first end portion is a first direction, a direction from the connecting end of the second end portion to the free end of the second end portion is a second direction, and the orientation of the first direction is the same as the orientation of the second direction;

[0033] Alternatively, the first end is arranged in parallel with the first subsection, and the second end is arranged in parallel with the second subsection.

[0034] By adopting the above solution, the design requirements of the antenna structure in different application scenarios can be met.

[0035] In some implementations, the first strip region includes a first sub-region, a transition sub-region, and a second sub-region that are sequentially connected;

[0036] The first coil layer further comprises a transition portion, the transition portion is arranged in the transition sub-region, the first connecting end portion is arranged in the first sub-region, and the second connecting end portion is arranged in the second sub-region;

[0037] The first connection end portion is connected to the second connection end portion via a transition portion, wherein one end of the transition portion is fixedly connected to the first connection end portion, and the other end of the transition portion is fixedly connected to the second connection end portion.

[0038] By adopting the above solution, the transition portion on the transition sub-area is connected to the first connection end and the second connection end to indirectly connect, so as to facilitate full use of the limited area of ​​the semi-finished circuit board and save materials.

[0039] In some implementations, the first connection end portion and the second connection end portion are fixedly connected by welding.

[0040] By adopting the above solution, the connection stability can be ensured by welding, so as to ensure the stability of the performance of the antenna structure, and it is also convenient to manufacture the antenna structure with a three-dimensional structure.

[0041] In some implementations, the first substrate layer has a plurality of positioning holes, and the plurality of positioning holes are distributed at intervals along the length direction of the first substrate layer.

[0042] By adopting the above solution, the positioning hole can facilitate the installation of the antenna structure and ensure the accuracy of the connection between the first connecting end and the second connecting end.

[0043] In some implementations, the first structural layer further includes a protruding layer, the protruding layer is connected to the first substrate layer, and the protruding layer extends out of an edge of the first substrate layer;

[0044] The protruding layer is provided with positioning holes.

[0045] By adopting the above solution and designing the protruding layer, the interference of the positioning holes on the first coil layer on the first substrate layer can be reduced.

[0046] In some implementations, the antenna structure is a flexible antenna.

[0047] By adopting the above solution, the design requirements of the antenna structure in different application scenarios can be met.

[0048] In some implementations, the flexible antenna is an NFC antenna.

[0049] By adopting the above solution, an NFC antenna with a three-dimensional structure can be easily manufactured, which can meet the design requirements of the antenna structure in different application scenarios.

[0050] A first aspect of the present application provides an electronic device, which includes a shell, a decorative component and the antenna structure in any embodiment of the present application, wherein the decorative component is fixed to the shell, the decorative component has a receiving cavity, and at least part of the antenna structure is attached to the cavity wall of the receiving cavity.

[0051] By adopting the above scheme, after the shape of the first structural layer is cut out on the planar semi-finished circuit board, the first substrate layer has a first end and a second end that are not directly connected, and the first connection end and the second connection end of the first coil layer are not connected. At this time, the first structural layer is in an open form, that is, the first structural layer is in a non-closed shape, and then the first connection end and the second connection end are fixedly connected, so that the first structural layer forms a closed shape, thereby solving the problem in the related art that the antenna structure cannot be directly cut to form a three-dimensional and closed shape, and the manufactured three-dimensional antenna structure can make full use of the limited space on the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0053] Figure 2 is a structural schematic diagram of an electronic device provided by an embodiment of the present application from another perspective;

[0054] Figure 3 is a partial cross-sectional view of an electronic device in an embodiment of the present application;

[0055] Figure 4 is a structural schematic diagram of an antenna structure provided in an embodiment of the present application;

[0056] Figure 5 is a structural schematic diagram of the antenna structure provided in an embodiment of the present application from another perspective;

[0057] Figure 6is another structural diagram of the antenna structure provided in an embodiment of the present application;

[0058] Figure 7 is a cross-sectional view of the antenna structure in an embodiment of the present application;

[0059] Figure 8 is a top view of the antenna structure provided in an embodiment of the present application;

[0060] Fig. 9 is a schematic structural diagram of the first substrate layer in an embodiment of the present application;

[0061] Fig.10 is a schematic structural diagram of the first coil layer in an embodiment of the present application;

[0062] Fig.11 It is a schematic diagram of the principle structure of the antenna structure manufacturing process provided in the embodiment of the present application;

[0063] Fig.12 is a schematic diagram of the structure after the first end portion and the second end portion are stacked;

[0064] Fig.13 It is a schematic diagram of the principle structure of the antenna structure manufacturing process provided in the embodiment of the present application;

[0065] Fig.14 is a schematic diagram of the structure after the first end portion and the second end portion are stacked;

[0066] Fig.15 It is a schematic diagram of the principle structure of the antenna structure manufacturing process provided in the embodiment of the present application;

[0067] Fig.16 is a schematic diagram of the structure after the first end portion and the second end portion are stacked;

[0068] Fig.17 It is a schematic diagram of the principle structure of the antenna structure manufacturing process provided in the embodiment of the present application;

[0069] Fig.18 is a schematic diagram of the structure after the first end portion and the second end portion are stacked;

[0070] Fig.19 It is a schematic diagram of the principle structure of the antenna structure manufacturing process provided in the embodiment of the present application;

[0071] Fig. 20 is a schematic diagram of a structure in which the first sub-region and the second sub-region are stacked with the transition sub-region respectively;

[0072] Fig.21 It is a schematic diagram of the principle structure of the antenna structure manufacturing process provided in the embodiment of the present application;

[0073] Fig. 22It is a schematic diagram of the structure in which the first sub-region and the second sub-region are stacked with the transition sub-region respectively.

[0074] The meanings of the figures are as follows:

[0075] 10. Antenna structure; 11. First structural layer; 111. First substrate layer; 1111. First end; 1112. Second end; 1113. Main body; 11131. First sub-segment; 11132. Second sub-segment; 11133. Third sub-segment; 1114. First contour edge; 112. First coil layer; 1121. First connection end; 1122. Second connection end; 1123. Coil main body; 1125. Feed connection part; 113. First protective layer; 12. Coil feeding point structure; 114. Protruding layer; 1141. Positioning hole; 115. First strip area; 1151. First sub-area; 1152. Transition sub-area; 1153. Second sub-area; 116. Second strip area; 117. Third strip area; 118. Fourth strip area; 1124. Transition part;

[0076] 20. Electronic device; 21. Display screen; 22. Middle frame; 23. Back cover; 24. Decorative parts; 25. Accommodating cavity; 26. Adhesive backing. DETAILED DESCRIPTION

[0077] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0078] It should be understood that the "multiple" mentioned in this application refers to two or more. In the description of this application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in order to facilitate the clear description of the technical solution of this application, the words "first" and "second" are used to distinguish between the same items or similar items with basically the same functions and effects. Those skilled in the art can understand that the words "first" and "second" do not limit the quantity and execution order, and the words "first" and "second" do not limit them to be different.

[0079] In the related art, the antenna structure of electronic devices, such as NFC antennas, is usually embedded in the back of mobile phones or under the screen. These antennas can communicate with other devices supporting NFC technology within a very short distance (usually a few centimeters), such as payment terminals, smart door locks, etc. When the NFC antenna is made of a flexible printed circuit board, when NFC is a two-dimensional planar structure, it is necessary to set up a planar area in the internal space of the mobile phone to install the planar NFC antenna, but this will constrain its installation path in the mobile phone and affect the installation of other components. For this reason, the NFC antenna is designed as a non-planar three-dimensional structure and fits in the uneven internal space of the mobile phone. However, since the NFC antenna is in the shape of a closed curve, it is impossible to directly cut a three-dimensional and closed NFC antenna on a semi-finished circuit board in a planar form when manufacturing the NFC antenna.

[0080] To this end, the embodiments of the present application provide an antenna structure and an electronic device to solve the problems in the related art. The antenna structure and the electronic device provided by the embodiments of the present application are explained in detail below.

[0081] Figure 1 is a schematic diagram of the structure of an electronic device 20 provided in an embodiment of the present application, Figure 2 is a structural diagram of an electronic device 20 provided in an embodiment of the present application from another perspective, combined with Figure 1 and Figure 2 As shown, in one or more embodiments, the electronic device 20 includes a display screen 21, a middle frame 22 and a back cover 23. The display screen 21 and the back cover 23 are respectively located on opposite sides of the middle frame 22 and form an inner cavity, in which a motherboard (not shown) is installed. Exemplarily, the electronic device 20 can be a mobile phone, a tablet computer, a notebook or an e-reader; the mobile phone can be a foldable mobile phone or a straight-screen mobile phone.

[0082] Figure 3 is a partial cross-sectional view of the electronic device 20 in the embodiment of the present application; Figure 2 and Figure 3As shown, in some embodiments, the electronic device 20 further includes a decorative part 24, and the decorative part 24 has a receiving cavity 25. The electronic device further includes an antenna structure 10. Exemplarily, the present application takes the antenna structure 10 as a flexible antenna, and the flexible antenna is an NFC antenna as an example for specific description; it can be understood that the antenna structure 10 can also be other flexible antennas, such as RFID (Radio Frequency Identification, RFID) antennas. At least part of the structure of the antenna structure 10 is attached to the cavity wall of the receiving cavity 25; the antenna structure 10 is electrically connected to the mainboard. For the antenna structure 10, it can be completely attached to the cavity wall of the receiving cavity 25, or a part of it can be attached to the cavity wall of the receiving cavity 25, and the other part can be attached to the cavity wall of the inner cavity; in addition, the antenna structure 10 has width, length and thickness, and the surface of the antenna structure 10 attached to the cavity wall mainly refers to the surface surrounded by the length and width of NFC, which can be called the length and width surface. The decorative element 24 may be in a rectangular, circular, elliptical, rectangular, diamond or other regular or approximately regular shapes, which is not specifically limited in the present embodiment of the application; for example, Figure 2 The outer shape of the decorative element 24 is generally rectangular.

[0083] In some embodiments, the electronic device 20 further includes a camera (not shown), which may be the back cover 23 of the electronic device for the housing, and the decorative member 24 may be a bracket for mounting the camera of the electronic device 20, which is used to support the camera (not shown). It should be understood that in some other embodiments, when the electronic device 20 includes a flash or a sensor, the bracket may also be used to mount the flash or the sensor. The sensor may be a laser ranging (time off light, TOF) sensor, an ambient light sensor, an infrared temperature sensor, or other devices that require light to participate in detection.

[0084] Figure 4 is a schematic diagram of the structure of the antenna structure 10 provided in the embodiment of the present application, see Figure 4 As shown, in some embodiments, one side of the antenna structure 10 has a backing adhesive 26, so that the antenna structure 10 can be attached to the decorative part 24 and / or the back cover 23 through the backing adhesive 26; the position and quantity of the backing adhesive 26 on the antenna structure 10 can be determined according to actual conditions, for example, the backing adhesive 26 is bonded to the position where the antenna structure 10 has a height difference, that is, the step, so that the antenna structure 10 can be firmly fixed on the cavity wall. It should be noted that the backing adhesive 26 is not limited to only one length and width surface of the antenna structure 10, but can also be pasted on two opposite length and width surfaces of the antenna structure 10.

[0085] Figure 5 is a structural schematic diagram of another perspective of the antenna structure 10 provided in an embodiment of the present application; see Figure 5As shown, in one or more embodiments, the antenna structure 10 provided by the present application includes: a first structure layer 11 and a coil feed point structure 12; the first structure layer 11 includes a first substrate layer 111 and a first coil layer 112, the first substrate layer 111 and the first coil layer 112 are stacked, the first substrate layer 111 is a linear structure, that is, the first substrate layer 111 has a certain length, and the coil feed point structure 12 is electrically connected to the first coil layer 112; the first substrate layer 111 has a first contour edge 1114, the first contour edge 1114 is a three-dimensional curve, and the first contour edge 1114 is a non-planar curve; after the coil feed point structure 12 is electrically connected to the first coil layer 112, the coil feed point structure 12 can be electrically connected to the mainboard through an electrical connector. The antenna structure 10 is in the form of a flexible circuit board, which is flexible.

[0086] See also Figure 5 As shown, in some embodiments, the first substrate layer 111 is a linear structure, that is, the length of the first substrate layer 111 is greater than the width, the length is greater than the thickness, and the width is also greater than the thickness, so that the first substrate layer 111 is plate-shaped and has a certain length; and the first coil layer 112 is fixedly connected to the first substrate layer 111, and the first coil layer 112 can be formed on the first substrate layer 111 by deposition and etching processes; the first coil layer 112 is formed by winding a conductive trace along the first substrate layer 111, so that the number of turns of the first coil layer 112 is at least one turn, and the number of turns can be 1 to 10 turns, which is not specifically limited in this application and can be determined according to actual conditions; the first coil layer 112 is roughly spirally wound on the first substrate layer 111. See Figure 5 As shown, the first coil layer 112 has one turn.

[0087] Figure 6 is another structural diagram of the antenna structure 10 provided in the embodiment of the present application; see Figure 6 As shown, in some other embodiments, the number of turns of the first coil layer 112 is 2. It should be noted that in order to facilitate the separation of the first coil layer 112 and the first substrate layer 111, Figure 6 The first coil layer 112 is indicated by a dotted line.

[0088] Figure 7 is a cross-sectional view of the antenna structure 10 in the embodiment of the present application, and the cross section is parallel to the thickness direction and the width direction of the antenna structure 10. Figure 7As shown, in some embodiments, the first structural layer 11 further includes a first protective layer 113, the first protective layer 113, the first coil layer 112 and the first substrate layer 111 are stacked in sequence, and the first coil layer 112 is located between the first protective layer 113 and the first substrate layer 111, that is, in the thickness direction of the antenna structure 10, the antenna structure 10 is divided into a plurality of layers, mainly including the first protective layer 113, the first coil layer 112 and the first substrate layer 111. The material of the first coil layer 112 can be a conductive material, such as a conductive metal or other non-metallic material, the conductive metal can be copper; the non-metallic material can be graphene, etc. The first protective layer 113 can be a polyimide film or resin. The material of the first substrate layer 111 can be a polyimide film, a polyester film or polyethylene terephthalate, etc.

[0089] Figure 8 is a top view of the antenna structure 10 provided in an embodiment of the present application, Fig. 9 is a schematic diagram of the structure of the first substrate layer 111 in the embodiment of the present application; Figure 8 and Fig. 9 As shown, in some embodiments, the first substrate layer 111 includes a first end 1111, a second end 1112 and a main body 1113; the first end 1111, the main body 1113 and the second end 1112 are arranged along the length direction of the first substrate layer 111, that is, the first end 1111, the second end 1112 and the main body 1113 are arranged in the length direction of the antenna structure 10; the first end 1111 is connected to one end of the main body 1113, and the second end 1112 is connected to the other end opposite to the main body 1113. The first coil layer 112 also has a feeding connection portion 1125, which is electrically connected to the coil feeding point structure 12.

[0090] Combination Figure 8 and Fig. 9 As shown, the coil feeding point structure 12 and the feeding connection portion 1125 are stacked on the first substrate layer 111. The coil feeding point structure 12 can be a sheet structure, which is beneficial to increase the contact area with other electrical devices.

[0091] See also Fig. 9 As shown, in some embodiments, the first structure layer 11 has a plurality of positioning holes 1141, and the plurality of positioning holes 1141 are spaced apart along the length direction of the first structure layer 11, so that the positioning holes 1141 can facilitate the installation of the antenna structure 10 and ensure the accuracy of the connection between the first connection end 1121 and the second connection end 1122. For example, see Fig. 9The first structural layer 11 further includes a protruding layer 114, which is connected to the first substrate layer 111 and extends out of the edge of the first substrate layer 111; the protruding layer 114 has a positioning hole 1141, and the design of the protruding layer 114 can reduce the interference of the positioning hole 1141 on the first coil layer 112 on the first substrate layer 111, and the material of the protruding layer 114 can be the same as that of the first substrate layer 111. The number of positioning holes 1141 on each protruding layer 114 can be one or more, which can be determined according to actual needs, and is not specifically limited in this application.

[0092] Fig.10 is a schematic diagram of the structure of the first coil layer 112 in the embodiment of the present application; Figure 8 , Fig. 9 and Fig.10 As shown, in some embodiments, the first coil layer 112 has a first connection end 1121 and a second connection end 1122, the first connection end 1121 is located on the first end 1111, and the second connection end 1122 is located on the second end 1112; wherein the first connection end 1121 and the second connection end 1122 are fixedly connected so that the first structure layer 11 forms a closed figure, that is, the first structure layer 11 forms a ring-shaped structure, so that the first structure layer 11 has a connection point and a connection position between the first connection end and the second connection end, so that the antenna structure 10 can be formed by cutting on a planar semi-finished circuit board. When manufacturing the first structural layer 11, a flattened structure of the non-closed first structural layer 11 can be first formed on a semi-finished circuit board in a planar form, so that the first structural layer 11 forms at least a non-closed linear structure. After the shape of the first structural layer 11 is cut out on the semi-finished circuit board in a planar form, the first substrate layer 111 has a first end 1111 and a second end 1112 that are not directly connected, and the first connection end 1121 and the second connection end 1122 of the first coil layer 112 are not connected. At this time, the first structural layer 11 is in an open form, that is, the first structural layer 11 is in a non-closed shape. Then, the first connection end 1121 and the second connection end 1122 are fixedly connected, so that the first structural layer 11 forms a closed shape, thereby solving the problem in the related art that the antenna structure 10 cannot be directly cut to form a three-dimensional and closed shape, and the antenna structure 10 of the present application can also have a high degree of fit with the mounting surface on the mobile phone to avoid distortion.

[0093] It should be noted that, when manufacturing the antenna structure 10, in addition to cutting the first structural layer 11 into a non-enclosed connecting segment as described above, the first structural layer 11 can also be divided into a plurality of connecting segments formed in a plane, and finally the different connecting segments are electrically connected to form a closed shape. In addition, the antenna structure 10 provided in the present application can be applied not only to electronic devices 20, but also to other engineering fields.

[0094] In some embodiments, the first end 1111, the second end 1112, the first connection end 1121 and the second connection end 1122 all have a certain length, and the respective lengths can be determined according to actual conditions; the length of the first end 1111 can be equal to the length of the first connection end 1121, and the length of the second end 1112 can be equal to the length of the second connection end 1122. The first end 1111, the second end 1112, the first connection end 1121, and the second connection end 1122 are all in a straight line. The first connection end 1121 and the second connection end 1122 are fixedly connected by welding, so that the welding method can ensure the stability of the connection, so as to ensure the stability of the performance of the antenna structure 10, and also facilitate the manufacture of the antenna structure 10 with a three-dimensional structure. For welding, it can be hot pressing welding, hot air welding, ultrasonic welding or laser welding. Of course, in some other possible embodiments, the first connection end 1121 and the second connection end 1122 can also be electrically connected by bonding, and the glue used for bonding is conductive glue.

[0095] See also Fig.10 As shown, in some embodiments, the first coil layer 112 also includes a coil body 1123, the first connection end 1121 and the feeding connection part 1125 are connected through the coil body 1123, and the second connection end 1122 and the feeding connection part 1125 are connected through the coil body 1123, that is, the portion between the first connection end 1121 and the feeding connection part 1125 is the coil body 1123, and the portion between the second connection end 1122 and the feeding connection part 1125 is the coil body 1123.

[0096] It should be noted that, for the coil body 1123, the first connection end 1121 and the second connection end 1122, each of the three may include a section of conductive traces, or may include multiple sections of conductive traces arranged side by side. For example, when the number of turns of the first coil layer 112 is one turn, each of the three includes only one section of conductive traces; when the number of turns of the first coil layer 112 is multiple turns, each of the three may include two or more sections of conductive traces.

[0097] Combination Figure 8 , Fig. 9 and Fig.10As shown, in some embodiments, the first structural layer 11 has a first strip area 115 and a second strip area 116 which are arranged at intervals, the first strip area 115 is a three-dimensional structure, and the second strip area 116 is a plane structure; the first contour edge 1114 is located in the first strip area 115, the length of the first contour edge 1114 is greater than the length of the positive projection of the first contour edge 1114 in the first plane, and the first plane is parallel to the surface of the second strip area 116. In this way, for the antenna structure 10, the first contour edge 1114 in the form of a three-dimensional curve is arranged on the first strip area 115 which is a three-dimensional structure. On the one hand, it is convenient to manufacture the antenna structure 10, reduce the fixed connection points of the antenna structure 10, and ensure the stability of the performance of the antenna structure 10. On the other hand, it is convenient for the antenna structure 10 to adapt to the installation position on the electronic device 20.

[0098] Exemplarily, since the first strip region 115 and the second strip region 116 are divided in the length direction of the antenna structure 10, and the first strip region 115 includes a partial structure of the first substrate layer 111 in its thickness direction, the first contour edge 1114 is located in the first strip region 115, but the position of the first contour edge 1114 is limited. When the first strip area 115 is three-dimensional, since the first structural layer 11 includes the first substrate layer 111 and the first coil layer 112, the parts of the first substrate layer 111 and the first coil layer 112 on the first strip area 115 are three-dimensional; and the parts of the first substrate layer 111 and the first coil layer 112 on the second strip area 116 are planar; the first structural layer 11 also has a third strip area 117 and a fourth strip area 118, and the third strip area 117 and the fourth strip area 118 are arranged relatively spaced apart; the two ends of the third strip area 117 in the length direction are respectively connected to the first strip area 115 and the second strip area 116, and the two ends of the fourth strip area 118 in the length direction are respectively connected to the first strip area 115 and the second strip area 116, so that the first structural layer 11 is roughly quadrilateral; the third strip area 117 and the fourth strip area 118 are also planar structures. For ease of understanding, in Figure 8 In the figure, dashed lines are used to define the respective areas of the first strip area 115 , the second strip area 116 , the third strip area 117 and the fourth strip area 118 .

[0099] It should be noted that, in some other possible implementations, one of the third strip area 117 and the fourth strip area 118 is planar and the other is three-dimensional. In this case, for the first structural layer 11 of the antenna structure 10, two independent connecting segments can be cut out on the planar semi-finished circuit board, and then the two connecting segments are electrically connected end to end to form a closed shape. In addition, in some other possible implementations, the first structural layer 11 can also include three, five or six multiple strip areas, and the multiple strip areas are connected end to end to form a closed shape; whether each strip area is in a planar form or a three-dimensional form can be determined according to actual conditions.

[0100] Combination Figure 8 , Fig. 9 and Fig.10 As shown, in some embodiments, the length of the first strip area 115 is greater than the length of the second strip area 116, so that it is convenient to fit the three-dimensional first strip area 115 into a space with a height difference in the electronic device 20, so that the antenna structure 10 can reasonably utilize the installation space in the electronic device 20.

[0101] In some embodiments, the first end 1111, the main body 1113 and the second end 1112 are an integrated structure, the main body 1113 includes a first sub-segment 11131 and a second sub-segment 11132; the first end 1111 and the second end 1112 both have opposite connection ends and free ends; the connection end of the first end 1111 is connected to the first sub-segment 11131, and the connection end of the second end 1112 is connected to the second sub-segment 11132, so that the first substrate layer 111 can have two free ends, namely the free end of the first end 1111 and the free end of the second end 1112, which reduces the connection position of the first substrate layer 111, and the first coil layer 112 is stacked with the first substrate layer 111, which is conducive to ensuring the overall structural strength and performance stability of the antenna structure 10. The free end means that in the process of manufacturing the antenna structure 10, after the first structure layer 11 is cut out on the flat semi-finished circuit board, there are two unconnected end points, namely the free end of the first end 1111 and the free end of the second end 1112.

[0102] In some embodiments, the first sub-segment 11131 and the second sub-segment 11132 are both straight-line; the main body 1113 also includes a third sub-segment 11133, which connects the first sub-segment 11131 and the second sub-segment 11132, and the first sub-segment 11131, the second sub-segment 11132 and the third sub-segment 11133 are distributed and divided in the length direction of the antenna structure 10.

[0103] When manufacturing and designing the antenna structure 10, in the reference direction, i.e., the GG direction, the length of the first strip area 115 after being unfolded into a plane is greater than the length of the second strip area 116, so that there is a length difference d between the length of the first strip area 115 and the length of the second strip area 116, and the length difference d is relatively large. Due to the length difference d, it is impossible to directly cut out the complete first strip area 115 and the second strip area 116 on the plane, so there must be a cutting position on the first strip area 115 or a cutting position on the second strip area 116. For the antenna structure 10, after it is cut on the semi-finished circuit board on the plane, the first connecting end 1121 and the second connecting end 1122 are connected, and then bent according to requirements to form a three-dimensional shape that can fit the installation position, a three-dimensional antenna structure 10 is formed. It should be noted that, for the design of the antenna structure 10, generally a three-dimensional drawing is designed first, and then it is unfolded into a plane according to the three-dimensional drawing, and a planar first structure layer 11 is produced on the circuit board. At this time, the first connection end 1121 and the second connection end 1122 are not connected; after the planar first structure layer 11 is produced, the shape of the first structure layer 11 is cut out. After the shape of the first structure layer 11 is cut out, the first connection end 1121 and the second connection end 1122 are connected and bent into a three-dimensional shape that meets the design requirements.

[0104] In some embodiments, when manufacturing and designing the antenna structure 10, the first end 1111 and the second end 1112 of the first substrate layer 111 can belong to the second strip area 116. In this way, when the first structure layer 11 is cut on the plane semi-finished circuit board, the length of the first strip area 115 is used as a reference, and the position where the first structure layer 11 is disconnected is set on the second strip area 116, thereby determining the positions of the first end 1111 and the second end 1112 of the first substrate layer 111, wherein the first sub-segment 11131 and the second sub-segment 11132 also belong to the second strip area 116. Furthermore, since the first connecting end 1121 of the first coil layer 112 is located on the first end 1111 and the second connecting end 1122 is located on the second end 1112, after the first end 1111 and the second end 1112 are determined, the positions of the first connecting end and the second connecting end can also be determined. When the first end 1111 and the second end 1112 belong to the second strip region 116 , there are at least three possible methods for manufacturing the first structure layer 11 , and the antenna structure 10 also has a corresponding shape structure.

[0105] For the case where the first end 1111 and the second end 1112 are on the second strip region 116 , the embodiment of the present application mainly provides three implementation methods, namely, methods A, B and C.

[0106] Method A: Fig.11is a schematic diagram of the principle structure of the manufacturing process of the antenna structure 10 provided in the embodiment of the present application; see Fig.11 As shown in Figure (a), in the cut first structural layer 11, the first end 1111 and the first sub-segment 11131 are arranged non-parallel, the second end 1112 and the second sub-segment 11132 are arranged non-parallel, the direction from the connecting end of the first end 1111 to the free end of the first end 1111 is the first direction S, and the direction from the connecting end of the second end 1112 to the free end of the second end 1112 is the second direction T; the direction of the first direction S is the same as the direction of the second direction T; see Fig.11 As shown in Figure (b), the first structural layer 11 forms a closed figure. Fig.12 is a schematic diagram of the structure after the first end 1111 and the second end 1112 are stacked; Fig.11 and Fig.12 As shown, after the first connection end portion 1121 and the second connection end portion 1122 are electrically connected, the first end portion 1111 and the second end portion 1112 are stacked in the thickness direction of the antenna structure 10. Fig.12 In order to distinguish the first connection end 1121 from the second connection end 1122 , two different dotted boxes are used to represent them, but the dotted boxes do not represent the specific structures of the first connection end 1121 and the second connection end 1122 .

[0107] Method B: Fig.13 is a schematic diagram of the principle structure of the manufacturing process of the antenna structure 10 provided in the embodiment of the present application; see Fig.13 As shown in Figure (a), in the cut first structural layer 11, the first end 1111 and the first sub-segment 11131 are arranged non-parallel, the second end 1112 and the second sub-segment 11132 are arranged non-parallel, the direction from the connecting end of the first end 1111 to the free end of the first end 1111 is the first direction S, and the direction from the connecting end of the second end 1112 to the free end of the second end 1112 is the second direction T; the direction of the first direction S is opposite to the direction of the second direction T; see Fig.13 As shown in Figure (b), the first structural layer 11 forms a closed figure. Fig.14 is a schematic diagram of the structure after the first end 1111 and the second end 1112 are stacked; Fig.13 and Fig.14 As shown, after the first connection end portion 1121 and the second connection end portion 1122 are electrically connected, the first end portion 1111 and the second end portion 1112 are stacked in the thickness direction of the antenna structure 10. Fig.14In order to distinguish the first connection end 1121 from the second connection end 1122 , two different dotted boxes are used to represent them, but the dotted boxes do not represent the specific structures of the first connection end 1121 and the second connection end 1122 .

[0108] In the method A and the method B, the angle formed between the first end 1111 and the first sub-segment 11131 can be an acute angle, a right angle or an obtuse angle, and the angle formed between the second end 1112 and the second sub-segment 11132 can be an acute angle, a right angle or an obtuse angle. When the first end 1111 and the second end 1112 are respectively arranged in a non-parallel manner with the length directions of different sub-segments of the main body 1113, the relationship between the orientations of the first direction S and the second direction T can be set as needed to meet the actual design requirements of the antenna structure 10.

[0109] Method C: Fig.15 is a schematic diagram of the principle structure of the manufacturing process of the antenna structure 10 provided in the embodiment of the present application; see Fig.15 As shown in Figure (a), the first end 1111 is arranged parallel to the first subsection 11131, and the second end 1112 is arranged parallel to the second subsection 11132; see Fig.15 As shown in Figure (b), the first structural layer 11 forms a closed figure. Fig.16 is a schematic diagram of the structure after the first end 1111 and the second end 1112 are stacked; Fig.15 and Fig.16 As shown, after the first connection end 1121 and the second connection end 1122 are electrically connected, the first end 1111 and the second end 1112 are stacked in the thickness direction of the antenna structure 10, so that the first end 1111 and the second end 1112 are respectively arranged in parallel with the length direction of different sub-segments of the main body 1113 to meet the actual design requirements of the antenna structure 10. Fig.16 In order to distinguish the first connection end 1121 from the second connection end 1122 , two different dotted boxes are used to represent them, but the dotted boxes do not represent the specific structures of the first connection end 1121 and the second connection end 1122 .

[0110] It should be noted that, when the first end 1111 and the first subsegment 11131 are arranged in parallel, and the second end 1112 and the second subsegment 11132 are arranged in parallel, the length of the first end 1111 and the length of the first subsegment 11131 can both be designed as needed, and the length of the second end 1112 and the length of the second subsegment 11132 can both be designed as needed, and the present application does not make any specific limitations.

[0111] In other embodiments, when manufacturing and designing the antenna structure 10, the first end 1111 and the second end 1112 of the first substrate layer 111 can both belong to the first strip area 115. In this way, when the first structure layer 11 is cut on the plane semi-finished circuit board, the length of the second strip area 116 is used as a reference, and the position where the first structure layer 11 is disconnected is set on the first strip area 115, so that the positions of the first end 1111 and the second end 1112 of the first substrate layer 111 are also determined, wherein the first sub-segment 11131 and the second sub-segment 11132 are on the first strip area 115. Furthermore, since the first connecting end 1121 of the first coil layer 112 is located on the first end 1111 and the second connecting end 1122 is located on the second end 1112, after the first end 1111 and the second end 1112 are determined, the positions of the first connecting end and the second connecting end can also be determined. When the first end 1111 and the second end 1112 are on the first strip region 115 , there are at least three possible methods for manufacturing the first structure layer 11 , and the antenna structure 10 also has a corresponding shape structure.

[0112] For the case where the first end 1111 and the second end 1112 are on the first strip region 115 , the embodiment of the present application mainly provides three implementation methods, namely, methods D, E and F.

[0113] Method D: Fig.17 is a schematic diagram of the principle structure of the manufacturing process of the antenna structure 10 provided in the embodiment of the present application; see Fig.17 As shown in Figure (a), in the cut first structural layer 11, the first end 1111 and the first sub-segment 11131 are arranged non-parallel, and the second end 1112 and the second sub-segment 11132 are arranged non-parallel; the direction from the connection end of the first end 1111 to the free end of the first end 1111 is the first direction S, and the direction from the connection end of the second end 1112 to the free end of the second end 1112 is the second direction T; the direction of the first direction S is opposite to the direction of the second direction T. By setting the directions in opposite directions, the actual design requirements of the antenna structure 10 can be met. Fig.17 As shown in Figure (b), the first structural layer 11 forms a closed figure. Fig.18 is a schematic diagram of the structure after the first end 1111 and the second end 1112 are stacked, Fig.17 and Fig.18As shown, after the first connection end 1121 and the second connection end 1122 are electrically connected, the first end 1111 and the second end 1112 are stacked in the thickness direction of the antenna structure 10, so that the first end 1111 and the second end 1112 are arranged in parallel with the length direction of the first sub-segment 11131 and the second sub-segment 11132 respectively, so as to meet the actual design requirements of the antenna structure 10. Fig.18 In order to distinguish the first connection end 1121 from the second connection end 1122 , two different dotted boxes are used to represent them, but the dotted boxes do not represent the specific structures of the first connection end 1121 and the second connection end 1122 .

[0114] Method E: Fig.19 is a schematic diagram of the principle structure of the manufacturing process of the antenna structure 10 provided in the embodiment of the present application; see Fig.19 As shown in Figure (a), in the cut first structural layer 11, the first end 1111 is arranged parallel to the first sub-segment 11131, and the second end 1112 is arranged parallel to the second sub-segment 11132. Fig.19 As shown in Figure (b), the first structural layer 11 forms a closed figure. Fig. 20 is a schematic diagram of a structure in which the first sub-area 1151 and the second sub-area 1153 are stacked with the transition sub-area 1152, respectively. Fig.19 and Fig. 20 As shown, in some embodiments, the first strip region 115 includes a first sub-region 1151, a transition sub-region 1152 and a second sub-region 1153 connected in sequence, and the transition sub-region 1152 is in a straight line shape; the two ends of the transition sub-region 1152 overlap the first sub-region 1151 and the second sub-region 1153 in the thickness direction of the antenna structure 10; the first coil layer 112 also has a transition portion 1124, and the transition portion 1124 belongs to the transition sub-region 1152. The first connecting end portion 1121 is arranged in the first sub-region 1151, and the second connecting end portion 1124 is arranged in the second sub-region 1153. 22 is arranged in the second sub-area 1153; the first connection end 1121 and the second connection end 1122 are connected via a transition portion 1124, wherein one end of the transition portion 1124 is fixedly connected to the first connection end 1121, and the other end of the transition portion 1124 is fixedly connected to the second connection end 1122. In this way, the transition portion 1124 on the transition sub-area 1152 is used to indirectly connect the first connection end 1121 and the second connection end 1122, so as to make full use of the limited area of ​​the semi-finished circuit board and save materials. Fig. 20 In order to distinguish the first connection end 1121, the second connection end 1122 and the transition portion 1124, two different dotted boxes are used to represent them, but the dotted boxes do not represent the specific structures of the first connection end 1121, the second connection end 1122 and the transition portion 1124.

[0115] It should be noted that in mode E, the first end 1111 and the first sub-segment 11131 are disposed in the first sub-area 1151, and the second end 1112 and the second sub-segment 11132 are disposed in the second sub-area 1153. Fig.19 In the embodiment, since the first end 1111 and the first sub-segment 11131 are arranged in parallel, and the second end 1112 and the second sub-segment 11132 are arranged in parallel, Fig.19 The specific lengths of the first end 1111, the first sub-segment 11131, the second end 1112, and the second sub-segment 11132 are not drawn, but only their respective positions are marked. Furthermore, since the first connecting end 1121 and the second connecting end 1122 are connected by the transition portion 1124, the connection between the first sub-area 1151, the transition sub-area 1152, and the second sub-area 1153 is achieved. In addition, when the first end 1111 and the first sub-segment 11131 are arranged in parallel, and the second end 1112 and the second sub-segment 11132 are arranged in parallel, the length of the first end 1111 and the length of the first sub-segment 11131 can be designed as needed, and the length of the second end 1112 and the length of the second sub-segment 11132 can be designed as needed, and the present application does not make specific restrictions.

[0116] Method F: Fig.21 is a schematic diagram of the principle structure of the manufacturing process of the antenna structure 10 provided in the embodiment of the present application; see Fig.21 As shown in Figure (a), in the cut first structural layer 11, the first end 1111 and the first sub-segment 11131 are arranged non-parallel, the second end 1112 and the second sub-segment 11132 are arranged non-parallel, the direction from the connection end of the first end 1111 to the free end of the first end 1111 is the first direction S, the direction from the connection end of the second end 1112 to the free end of the second end 1112 is the second direction T, and the orientation of the first direction S is the same as the orientation of the second direction T; by setting the same orientation, the actual design requirements of the antenna structure 10 can be met. See Fig.21 As shown in Figure (b), the first structural layer 11 forms a closed figure. Fig. 22 is a schematic diagram of a structure in which the first sub-area 1151 and the second sub-area 1153 are stacked with the transition sub-area 1152, respectively. Fig.21 and Fig. 22As shown, in some embodiments, the first strip region 115 includes a first sub-region 1151, a transition sub-region 1152 and a second sub-region 1153 connected in sequence; the transition sub-region 1152 is U-shaped; the two ends of the transition sub-region 1152 overlap the first sub-region 1151 and the second sub-region 1153 in the thickness direction of the antenna structure 10; the first coil layer 112 also has a transition portion 1124, the transition portion 1124 belongs to the transition sub-region 1152, the first connection end portion 1121 is arranged in the first sub-region 1151, and the second connection end portion 1124 is arranged in the first sub-region 1151. 22 is arranged in the second sub-area 1153; the first connecting end 1121 and the second connecting end 1122 are connected via a transition portion 1124, wherein one end of the transition portion 1124 is fixedly connected to the first connecting end 1121, and the other end of the transition portion 1124 is fixedly connected to the second connecting end 1122. In this way, the transition portion 1124 on the transition sub-area 1152 is used to indirectly connect the first connecting end 1121 and the second connecting end 1122, so as to make full use of the limited area of ​​the semi-finished circuit board and save materials. It should be noted that in method F, the first end 1111 and the first sub-segment 11131 are arranged in the first sub-area 1151, and the second end 1112 and the second sub-segment 11132 are arranged in the second sub-area 1153. Fig. 22 In order to distinguish the first connection end 1121, the second connection end 1122 and the transition part 1124, two different dotted boxes are used to represent them, but the dotted boxes do not represent the specific structures of the first connection end 1121, the second connection end 1122 and the transition part 1124. In summary, when manufacturing the antenna structure 10 and the electronic device 20 provided in the embodiment of the present application, the local area is first interrupted to facilitate cutting on the semi-finished circuit on the plane, and then electrically connected by welding or bonding, etc., which can realize the NFC function and solve the problem of inconsistent lengths of the two relative strip areas, and can be free from the internal steps of the electronic device 20, making full use of the space.

[0117] In the description of the specification of the present application, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0118] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An antenna structure, characterized in that: include: a first structural layer, the first structural layer comprising a first substrate layer and a first coil layer, the first substrate layer and the first coil layer being stacked, the first substrate layer comprising a first end, a main body, and a second end, the first end, the main body, and the second end being arranged along a length direction of the first substrate layer, the first end being connected to one end of the main body, the second end being connected to the other end opposite to the main body, the first coil layer having a first connecting end and a second connecting end, the first connecting end being located on the first end, and the second connecting end being located on the second end; a coil feeding point structure, the coil feeding point structure being electrically connected to the first coil layer; The first connecting end portion is fixedly connected to the second connecting end portion so that the first structural layer forms a closed figure, and the first substrate layer has a first contour edge, which is a three-dimensional curve.

2. The antenna structure according to claim 1, characterized in that: The first structural layer comprises a first strip region and a second strip region which are arranged at intervals, the first strip region is a three-dimensional structure, and the second strip region is a planar structure; The first contour edge is located in the first strip area.

3. The antenna structure according to claim 2, characterized in that: The length of the first strip area is greater than the length of the second strip area.

4. The antenna structure according to claim 2, characterized in that: The first end portion, the main body portion and the second end portion are an integrated structure, and the main body portion includes a first sub-segment and a second sub-segment; The first end portion and the second end portion each have an opposite connecting end and a free end; The connection end of the first end is connected to the first subsegment, and the connection end of the second end is connected to the second subsegment.

5. The antenna structure according to claim 4, characterized in that: The first end portion and the second end portion are disposed in the second strip region.

6. The antenna structure according to claim 5, characterized in that: The first end portion is non-parallel to the first sub-segment, the second end portion is non-parallel to the second sub-segment, a direction from the connecting end of the first end portion to the free end of the first end portion is a first direction, and a direction from the connecting end of the second end portion to the free end of the second end portion is a second direction; The orientation of the first direction is the same as the orientation of the second direction, or the orientation of the first direction is opposite to the orientation of the second direction.

7. The antenna structure according to claim 5, characterized in that: The first end is arranged in parallel with the first subsection, and the second end is arranged in parallel with the second subsection.

8. The antenna structure according to claim 4, characterized in that: The first end portion and the second end portion are disposed in the first strip region.

9. The antenna structure according to claim 8, characterized in that: The first end portion is arranged non-parallel to the first subsection, and the second end portion is arranged non-parallel to the second subsection; A direction from the connecting end of the first end portion to the free end of the first end portion is a first direction, and a direction from the connecting end of the second end portion to the free end of the second end portion is a second direction; The first direction is opposite to the second direction.

10. The antenna structure according to claim 8, characterized in that: The first end portion is non-parallel to the first sub-segment, the second end portion is non-parallel to the second sub-segment, a direction from the connecting end of the first end portion to the free end of the first end portion is a first direction, a direction from the connecting end of the second end portion to the free end of the second end portion is a second direction, and a direction of the first direction is the same as a direction of the second direction; Alternatively, the first end portion is arranged in parallel with the first sub-segment, and the second end portion is arranged in parallel with the second sub-segment.

11. The antenna structure according to claim 10, characterized in that: The first strip area includes a first sub-area, a transition sub-area and a second sub-area connected in sequence; The first coil layer further comprises a transition portion, the transition portion is arranged in the transition sub-region, the first connecting end portion is arranged in the first sub-region, and the second connecting end portion is arranged in the second sub-region; The first connection end portion and the second connection end portion are connected via the transition portion, wherein one end of the transition portion is fixedly connected to the first connection end portion, and the other end of the transition portion is fixedly connected to the second connection end portion.

12. The antenna structure according to any one of claims 1 to 11, characterized in that: The first connection end portion and the second connection end portion are fixedly connected by welding.

13. The antenna structure according to any one of claims 1 to 11, characterized in that: The first structural layer has a plurality of positioning holes, and the plurality of positioning holes are distributed at intervals along the length direction of the first structural layer.

14. The antenna structure according to claim 13, characterized in that: The first structural layer further comprises a protruding layer, wherein the protruding layer is connected to the first substrate layer, and the protruding layer extends out of an edge of the first substrate layer; The protruding layer is provided with the positioning hole.

15. The antenna structure according to any one of claims 1 to 11, characterized in that: The antenna structure is a flexible antenna.

16. The antenna structure according to claim 15, characterized in that: The flexible antenna is an NFC antenna.

17. An electronic device, characterized in that: It comprises a shell, a decorative piece and the antenna structure as described in any one of claims 1-16, wherein the decorative piece is fixed on the shell, the decorative piece has a receiving cavity, and at least part of the structure of the antenna structure is attached to the cavity wall of the receiving cavity.

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