Antenna device and electronic equipment

Abstract

The embodiment of the present application provides an antenna device and an electronic device, the antenna device includes a coil and a first shielding member, the coil includes a first portion of wires and a second portion of wires arranged opposite to each other, and the current is transmitted in opposite directions in the first portion of wires and the second portion of wires. The first shielding member is arranged on one side of the coil, and the projection of the first shielding member on the coil at least partially covers the second portion of wires to weaken the intensity of the magnetic field generated by the second portion of wires under the action of the current. Based on this, the antenna device and the electronic device of the embodiment of the present application can not only ensure the radiation performance of the antenna device, but also realize the miniaturization of the coil and the antenna device.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to an antenna device and an electronic device. Background Art

[0002] With the development of communication technology, electronic devices such as smart phones can realize more and more functions, and the communication modes of electronic devices are also more diverse. For example, electronic devices can gradually realize near field communication (NFC) recently.

[0003] However, with the development of electronic technology, electronic devices are becoming increasingly smaller, lighter and thinner. The internal space of electronic devices is limited, which leads to the limitation of the volume of NFC antennas. How to reasonably design NFC antennas for electronic devices is a difficult problem that needs to be solved urgently. Summary of the invention

[0004] The embodiments of the present application provide an antenna device and an electronic device, and the antenna device can be miniaturized.

[0005] In a first aspect, an embodiment of the present application provides an antenna device, including:

[0006] A coil, the coil comprising at least a first portion of conductive wires and a second portion of conductive wires arranged opposite to each other, wherein currents in the first portion of conductive wires and the second portion of conductive wires are transmitted in opposite directions; and

[0007] A first shielding member is disposed at one side of the coil, and a projection of the first shielding member on the coil at least partially covers the second portion of the conductive wire to reduce the intensity of the magnetic field generated by the second portion of the conductive wire under the action of the current.

[0008] In a second aspect, an embodiment of the present application provides an electronic device, including:

[0009] An antenna device, wherein the antenna device is the above-mentioned antenna device; and

[0010] A circuit board is located at a side of the first shielding component away from the coil. A signal source is provided on the circuit board. The signal source is electrically connected to the coil so that the coil transmits a wireless signal.

[0011] In the antenna device and electronic device of the embodiments of the present application, the projection of the first shielding component on the coil covers the second part of the wire. The first shielding component can weaken the strength of the magnetic field generated by the second part of the wire under the action of the current. At this time, the width of the central area of ​​the coil can be reduced, the distance between the first part of the wire and the second part of the wire can be smaller, the area occupied by the coil can be reduced, and the first shielding component can weaken the inhibitory effect of the second part of the wire on the magnetic field of the first part of the wire, which can not only ensure the radiation performance of the entire coil, but also realize the miniaturization of the coil and the antenna device. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0013] Figure 1 A first structural schematic diagram of an electronic device provided in an embodiment of the present application.

[0014] Figure 2 A first structural schematic diagram of an antenna device provided in an embodiment of the present application.

[0015] Figure 3 for Figure 2 The schematic diagram of the coil generating the first magnetic field is shown.

[0016] Figure 4 for Figure 2 The coil shown generates a second magnetic field schematic.

[0017] Figure 5 A second structural schematic diagram of the antenna device provided in an embodiment of the present application.

[0018] Figure 6 for Figure 2 A schematic diagram of a first structure of the coil.

[0019] Figure 7 for Figure 2 A schematic diagram of a second structure of the coil.

[0020] Figure 8 A third structural schematic diagram of the antenna device provided in an embodiment of the present application.

[0021] Fig. 9 A second structural schematic diagram of an electronic device provided in an embodiment of the present application.

[0022] Fig.10 A third structural schematic diagram of the electronic device provided in an embodiment of the present application.

[0023] Fig.11 A fourth structural schematic diagram of an electronic device provided in an embodiment of the present application.

[0024] Fig.12 A fifth structural schematic diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0025] The following will be combined with the attached examples of the present application Figures 1 to 12 , the technical solutions in the embodiments of the present application are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0026] The present application provides an electronic device. The electronic device may be a smart phone, a tablet computer, or a gaming device, an augmented reality (AR) device, an automotive device, a data storage device, an audio player, a video player, a laptop computer, a desktop computing device, etc. Figure 1 , Figure 1 The first structural diagram of the electronic device provided in the embodiment of the present application is as follows: The electronic device 100 includes a display screen 110 , a middle frame 120 , a circuit board 130 , a battery 140 and a rear housing 150 .

[0027] The display screen 110 is disposed on the middle frame 120 to form a display surface of the electronic device 100 for displaying information such as images and texts. The display screen 110 may include a liquid crystal display (LCD) or an organic light-emitting diode (OLED) display.

[0028] It is understandable that the display screen 110 can be a full screen, in which case the entire area of ​​the display screen 110 is a display area and does not include a non-display area, or the non-display area on the display screen 110 only occupies a smaller area for the user, so that the display screen 110 has a larger screen-to-body ratio. Alternatively, the display screen 110 can also be a non-full screen, in which case the display screen 110 includes a display area and a non-display area adjacent to the display area. The display area is used to display information, and the non-display area does not display information.

[0029] It is understandable that a cover plate may be provided on the display screen 110 to protect the display screen 110 from being scratched or damaged by water. The cover plate may be a transparent glass cover plate, so that the user can observe the content displayed on the display screen 110 through the cover plate. It is understandable that the cover plate may be a sapphire glass cover plate.

[0030] The middle frame 120 may be a thin plate or sheet-like structure, or a hollow frame structure. The middle frame 120 is used to provide support for the electronic devices or functional components in the electronic device 100, so as to install the electronic devices and functional components of the electronic device 100 together. For example, the middle frame 120 may be provided with structures such as grooves, protrusions, and through holes to facilitate the installation of the electronic devices or functional components of the electronic device 100. It is understandable that the material of the middle frame 120 may include metal or plastic.

[0031] The circuit board 130 is arranged on the middle frame 120 for fixing, and the circuit board 130 is sealed inside the electronic device 100 through the rear shell 150. The circuit board 130 may be a mainboard of the electronic device 100. A processor may be integrated on the circuit board 130, and one or more functional components such as an earphone interface, an acceleration sensor, a gyroscope, and a motor may also be integrated. At the same time, the display screen 110 may be electrically connected to the circuit board 130 so that the display of the display screen 110 is controlled by the processor on the circuit board 130.

[0032] The battery 140 is disposed on the middle frame 120, and the battery 140 is sealed inside the electronic device 100 through the rear case 150. At the same time, the battery 140 is electrically connected to the circuit board 130 so that the battery 140 can power the electronic device 100. Among them, a power management circuit may be disposed on the circuit board 130. The power management circuit is used to distribute the voltage provided by the battery 140 to various electronic devices in the electronic device 100.

[0033] The rear shell 150 is connected to the middle frame 120. For example, the rear shell 150 can be attached to the middle frame 120 by adhesives such as double-sided tape to achieve connection with the middle frame 120. The rear shell 150 is used to seal the electronic devices and functional components of the electronic device 100 inside the electronic device 100 together with the middle frame 120 and the display screen 110, so as to protect the electronic devices and functional components of the electronic device 100.

[0034] Among them, the electronic device 100 may also be provided with an antenna device. The antenna device is used to implement the wireless communication function of the electronic device 100, for example, the antenna device can be used to implement the near field communication function. The antenna device can be arranged inside the housing of the electronic device. It can be understood that some components of the antenna device can be integrated on the circuit board 130, for example, the signal processing chip and the signal processing circuit in the antenna device can be integrated on the circuit board 130 to realize the electrical connection between the antenna device and the circuit board 130. In addition, some components of the antenna device can also be directly arranged inside the electronic device 100. For example, the radiator or conductor structure of the antenna device for radiating signals can be directly arranged on the inner surface of the rear shell 150.

[0035] Please refer to Figure 2 , Figure 2 The first structural schematic diagram of the antenna device provided in the embodiment of the present application is as follows: The antenna device 200 may include a coil 210 and a first shielding member 220 .

[0036] The coil 210 may be formed by winding a conductor around its rotation center. The coil 210 may include a first portion of conductive wires 211 and a second portion of conductive wires 212 that are arranged opposite to each other. The so-called opposite arrangement may mean that the first portion of conductive wires 211 and the second portion of conductive wires 212 are located on both sides of the rotation center, respectively, and a central area 213 is formed between the first portion of conductive wires 211 and the second portion of conductive wires 212. When the coil 210 generates a magnetic field under the action of a changing current, the magnetic field lines may pass through the central area 213.

[0037] It can be understood that the current transmission direction between the first portion of the conductive wire 211 and the second portion of the conductive wire 212 is opposite. Figure 2 As shown, when the transmission direction of the current in the coil 210 is clockwise, the transmission direction in the first part of the wire 211 may be from left to right, and the transmission direction in the second part of the wire 212 may be from right to left, and the two transmission directions are opposite. For another example, when the transmission direction of the current in the coil 210 is counterclockwise, the transmission direction in the first part of the wire 211 may be from right to left, and the transmission direction in the second part of the wire 212 may be from left to right, and the two transmission directions are opposite.

[0038] Understandably, Figure 2 This is only an illustrative example of the first portion of the wire 211 and the second portion of the wire 212 in the embodiment of the present application. For example, the first portion of the wire 211 in the embodiment of the present application may also be Figure 2 The left vertical wire in the coil 210, the second part of the wire 212 can be Figure 2The vertical wire on the right side of the coil 210 in the embodiment of the present invention may be the first wire 211 and the second wire 212. At this time, the current flow directions in the first wire 211 and the second wire 212 may also be opposite. Therefore, any two wires in the coil 210 that are oppositely arranged and have opposite current flow directions may be the first wire 211 and the second wire 212 in the embodiment of the present invention. The first wire 211 and the second wire 212 in the embodiment of the present invention are not limited to the above examples.

[0039] When the width of the central area 213 is large, that is, when the distance between the first portion of the conductor 211 and the second portion of the conductor 210 is large, the directions of the magnetic fields generated by the first portion of the conductor 211 and the second portion of the conductor 212 in the central area 213 are the same, and the magnetic fields of the two portions can enhance each other. Figure 2 Please also refer to Figure 3 , Figure 3 for Figure 2 The coil 210 is shown to generate a first magnetic field schematic.

[0040] like Figure 3 As shown, when the current is transmitted in the coil 210 in a clockwise direction, the current is transmitted in the first portion of the conductor 211 from left to right. According to Ampere's law, the direction of the magnetic field lines of the first portion of the conductor 211 in the central area 213 is from outside to inside ( Figure 3 The direction of the magnetic field lines in the area of ​​the first portion of the conductor 211 outside the central area 213 and away from the second portion of the conductor 212 is from inside to outside ( Figure 3 Similarly, the transmission direction in the second portion of the conductor 212 is from right to left. According to Ampere's law, the direction of the magnetic field lines of the second portion of the conductor 212 in the central area 213 is from outside to inside ( Figure 3 The direction of the magnetic field lines of the second portion of the conductor 212 outside the central region 213 and in the area away from the first portion of the conductor 211 is from inside to outside ( Figure 3 Thus, in the central region 213, the directions of the magnetic lines of force of the first portion of the conductor 211 and the second portion of the conductor 212 are both from outside to inside, and the two are in the same direction, and the magnetic fields generated by the first portion of the conductor 211 and the second portion of the conductor 212 can enhance each other.

[0041] When the width of the central area 213 is small, that is, when the distance between the first portion of the wire 211 and the second portion of the wire 210 is small, the directions of the magnetic fields generated by the first portion of the wire 211 and the second portion of the wire 212 are opposite, and the magnetic fields of the two can suppress each other. Figure 2 Please also refer to Figure 4 , Figure 4 for Figure 2 The coil 210 is shown to generate a second magnetic field schematic diagram.

[0042] like Figure 4 As shown, when the current is transmitted in the coil 210 in a clockwise direction, the current is transmitted in the first portion of the conductor 211 from left to right. According to Ampere's law, the direction of the magnetic field lines of the first portion of the conductor 211 on the side close to the second portion of the conductor 212 is from outside to inside ( Figure 4 The direction of the magnetic field lines of the first portion of the conductor 211 in the area on the side away from the second portion of the conductor 212 is from inside to outside ( Figure 4 Similarly, the transmission direction in the second conductor 212 is from right to left. According to Ampere's law, the direction of the magnetic field lines of the second conductor 212 near the first conductor 211 is from outside to inside ( Figure 4 The direction of the magnetic field lines of the second portion of the conductor 212 in the area away from the first portion of the conductor 211 is from inside to outside ( Figure 4 Thus, in the region where the first portion of the conductor 211 is located, the directions of the magnetic lines of force of the first portion of the conductor 211 and the second portion of the conductor 212 are opposite; in the region where the second portion of the conductor 212 is located, the directions of the magnetic lines of force of the first portion of the conductor 211 and the second portion of the conductor 212 are also opposite, and thus the magnetic fields generated by the first portion of the conductor 211 and the second portion of the conductor 212 can suppress each other.

[0043] In order to realize the miniaturization of the electronic device 100, the space occupied by the antenna device 200 is getting smaller and smaller, and accordingly, the volume of the antenna device 200 is also getting smaller and smaller. However, when the distance between the first part of the wire 211 and the second part of the wire 212 of the coil 210 is reduced, the following may occur: Figure 4 The magnetic fields generated by the first portion of the conductive wire 211 and the second portion of the conductive wire 212 suppress each other.

[0044] Based on this, the first shielding member 220 can be disposed on one side of the coil 210, and the projection of the first shielding member 220 on the coil 210 can at least partially cover the second portion of the conductor 212. When the second portion of the conductor 212 generates magnetic lines of force from the inside to the outside or from the outside to the inside under the action of the current, the vast majority of the magnetic lines of force (there will be a small number of magnetic lines of force radiating from the unblocked area of ​​the second portion of the conductor 212 to the free space) cannot pass through the first shielding member 22, so that when the width of the central area 213 of the coil 210 is small, the second portion of the conductor 212 will not generate a magnetic field that suppresses the first portion of the conductor 211.

[0045] In the antenna device 200 of the embodiment of the present application, the projection of the first shielding member 220 on the coil 210 at least partially covers the second part of the wire 212. The first shielding member 220 can weaken the strength of the magnetic field generated by the second part of the wire 212 under the action of the current. At this time, the width of the central area 213 of the coil 210 can be reduced, the spacing between the first part of the wire 211 and the second part of the wire 212 is small, the area occupied by the coil 210 can be reduced, and the first shielding member 220 can weaken the inhibitory effect of the second part of the wire 212 on the magnetic field of the first part of the wire 211, which can not only ensure the radiation performance of the entire coil 210, but also realize the miniaturization of the coil 210 and the antenna device 200.

[0046] Among them, please refer to Figure 5 , Figure 5 The second structural schematic diagram of the antenna device provided in the embodiment of the present application. The antenna device may further include a second shielding member 230, and the second shielding member 230 may be disposed on the other side of the coil 210. That is, the first shielding member 220 and the second shielding member 230 may be disposed on opposite sides of the coil 210.

[0047] The projection of the second shielding member 230 on the coil 210 can at least partially cover the second portion of the conductor 212. When the second portion of the conductor 212 generates magnetic lines of force from the inside to the outside or from the outside to the inside under the action of the current, most of the magnetic lines of force cannot pass through the first shielding member 220 and the second shielding member 230 at the same time. Therefore, when the central area 213 of the coil 210 is small, the second portion of the conductor 212 will not generate a magnetic field that suppresses the first portion of the conductor 211. The second shielding member 230 can further weaken the strength of the magnetic field generated by the second portion of the conductor 212 under the action of the current.

[0048] Moreover, in the actual product, the shortest distance between the first part of the wire 211 and the second part of the wire 212 of the coil 210 of the embodiment of the present application can be between 2 mm and 10 mm. It can be understood that when the first part of the wire 211 and the second part of the wire 212 are single-turn coil wires, the shortest distance can be the distance between two turns of the coil wire; when the first part of the wire 211 and the second part of the wire 212 are multi-turn coil wires, the shortest distance can be the distance between the turn of the coil wire in the first part of the wire 211 closest to the second part of the wire 212 and the turn of the coil wire in the second part of the wire 212 closest to the first part of the wire 211. It can be understood that the shortest distance can also be the width of the central area 213 formed between the first part of the wire 211 and the second part of the wire 212. The coil 210 of the embodiment of the present application can greatly reduce the area occupied by the coil 210.

[0049] It should be understood that, in the description of this application, terms such as "first", "second", etc. are only used to distinguish similar objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0050] Please combine Figure 2 Please also refer to Figure 6 , Figure 6 for Figure 2 The first structural schematic diagram of the coil is shown. The radial width of the second portion of the wire 212 of the coil 210 of the embodiment of the present application may be different from the radial width of the first portion of the wire 211. It can be understood that the radial width corresponds to the axial length, the axial length refers to the length between the two free ends of the coil, and the radial width may refer to the cross-sectional diameter of the coil wire in the radial section.

[0051] It is understandable that the radial width of the first portion of the wire 211 may be greater than the radial width of the second portion of the wire 212 , or the radial width of the second portion of the wire 212 may be greater than the radial width of the first portion of the wire 211 , so as to further reduce the area occupied by the coil 210 .

[0052] It is understandable that when the radial width of each turn of the conductor in the first portion of the conductor 211 / the second portion of the conductor 212 is the same, the radial width may be the radial width of a single turn coil. In this case, the radial width of a single turn of the conductor in the second portion of the conductor 212 may be different from the radial width of a single turn of the conductor in the first portion of the conductor 211.

[0053] It is understood that when the radial widths of the multiple turns of conductors in the first portion of the conductor 211 / the second portion of the conductor 212 are different, the radial width may be the average radial width of the conductor. In this case, the average radial width of the second portion of the conductor 212 may be different from the average radial width of the first portion of the conductor 211 .

[0054] It can be understood that the spacing between two adjacent turns of wire in the first part of the wire 211 can be equal to the spacing between two adjacent turns of wire in the second part of the wire 212, so that when the radial width of the second part of the wire 212 is different from the radial width of the first part of the wire 211, the areas occupied by the first part of the wire 211 and the second part of the wire 212 are different, which can reduce the area occupied by the entire coil 210.

[0055] It can be understood that the spacing between two adjacent turns of the wire in the first part of the wire 211 may not be equal to the spacing between two adjacent turns of the wire in the second part of the wire 212. For example, the spacing between two adjacent turns of the wire in the second part of the wire 212 is smaller than the spacing between two adjacent turns of the wire in the first part of the wire 211, so that the area covered by the second part of the wire 212 is smaller, which is more conducive to the shielding of the first shielding component 220 and the second shielding component 230.

[0056] In the embodiment of the present application, the radial width of the second portion of the conductor 212 is different from the radial width of the first portion of the conductor 211. Compared with the solution in which the radial width of the second portion of the conductor 212 is equal to the radial width of the first portion of the conductor 211, the embodiment of the present application can make the radial width of the second portion of the conductor 212 or the radial width of the first portion of the conductor 211 smaller, and thus the area occupied by the coil 210 is smaller.

[0057] Furthermore, when the current intensity flowing through the conductor is constant, the smaller the radial width of the conductor, the denser the magnetic lines of force formed by the conductor. Therefore, if the radial width of the first conductor 211 is smaller than the coil diameter of the second conductor 212, the magnetic lines of force of the magnetic field formed by the first conductor 211 are denser, and the magnetic field formed by the first conductor 211 is stronger, so that the first conductor 211 can have a stronger induction on the object in the area where its magnetic field is located. If the radial width of the second conductor 212 is smaller than the radial width of the first conductor 211, the magnetic lines of force of the magnetic field formed by the second conductor 212 are denser, and when the projections of the first shielding member 220 and the second shielding member 230 on the coil 210 cover the second conductor 212, the first shielding member 220 and the second shielding member 230 can more easily shield the dense magnetic lines of force, and the first shielding member 220 and the second shielding member 230 can more easily weaken the intensity of the magnetic field generated by the second conductor 212 under the action of the current.

[0058] Please combine Figure 2 Please also refer to Figure 7 , Figure 7 A second structural diagram of the antenna device provided in the embodiment of the present application. The antenna device 200 in the embodiment of the present application may further include a substrate 240 , a first electrical connector 214 and a second electrical connector 215 .

[0059] The substrate 240 may be used to carry or form the coil 210. The substrate 240 may include a first surface 241 and a second surface 242 that are arranged opposite to each other. The coil 210 may be arranged on one of the first surface 241 and the second surface 242, such as the first surface. The first electrical connector 214 may be arranged on the first surface 241 and the second surface 242. The second electrical connector 215 may be arranged on one of the first surface 241 and the second surface 242, such as the first surface. Figure 6 In the embodiment, the first portion of the conductive wire 211 , the second portion of the conductive wire 212 , the second electrical connector 215 , and most of the first electrical connector 214 of the coil 210 may be disposed on the first surface 241 , and a small portion of the first electrical connector 214 may be disposed on the second surface 242 .

[0060] One end of the first electrical connector 214 can be electrically connected to a free end of the coil 210, and the other end of the first electrical connector 214 can be electrically connected to other devices such as a power supply, a control chip, etc., so that a current signal can be input or output from the free end.

[0061] One end of the second electrical connector 215 can be electrically connected to the other free end of the coil 210, and the other end of the second electrical connector 215 can be electrically connected to other devices such as a power supply, a control chip, a ground plane, etc., so that a current signal can be input or output from the free end.

[0062] When the coil 210 is wound around the rotation center, a free end of the coil 210 is necessarily located in the central area 213, so that the free end is inconvenient to be electrically connected to an external device. At this time, at least two vias may be arranged on the substrate 240 at intervals, such as a first via 243 and a second via 244. Both vias penetrate the first surface 241 and the second surface 242 of the substrate 240.

[0063] It is understandable that each via hole may vertically penetrate the first surface 241 and the second surface 242 of the substrate 240 to make the via hole process simpler.

[0064] It is understandable that each via hole can also be bent or extended once inside the substrate 240, or be bent or extended multiple times to form a curved hole. When the first electrical connector 214 passes through the via hole, the position of the first electrical connector 214 on the first surface 241 and the second surface 242 can be flexibly set.

[0065] One end of the first electrical connector 214 can be electrically connected to the free end of the coil 210 located in the central area 213, and the other end of the first electrical connector 214 can pass through each via hole in sequence. Exemplarily, the other end of the first electrical connector 214 can be set on the first surface 241, and the other end of the first electrical connector 214 can first pass through the first via hole 243 from the first surface 241 and be set on the second surface 242, and then extend on the second surface 242 to enter the second via hole 244, and finally extend from the second via hole 244 to the first surface 241. At this time, the positions of the first via hole 243 and the second via hole 244 can be reasonably set, so that the other end of the first electrical connector 214 passing through the second via hole 244 can be set outside the central area 213, so that the first electrical connector 214 can be electrically connected to other devices.

[0066] The antenna device 200 of the embodiment of the present application is provided with at least two via holes on the substrate 240. The other end of the first electrical connector 214 can be located in the central area 213 of the first surface 241 through the multiple via holes, so as to facilitate the electrical connection between the coil 210 and other devices.

[0067] The coil 210 may be directly or indirectly connected to the substrate 240 , for example, connected to the first surface 241 and the second surface 242 of the substrate 240 via an adhesive; or, the coil 210 may also be directly formed on the substrate 240 .

[0068] Exemplarily, the first surface 241 and the second surface 242 of the substrate 240 may be attached with a metal layer, such as copper plating, iron plating, etc. The first portion of the wire 211, the second portion of the wire 212, the first electrical connector 214, and the second electrical connector 215 may be formed on the first surface 241 and the second surface 242 of the substrate 240 by etching. For example, on the first surface 241 of the substrate 240, the metal plating layer where the first portion of the wire 211, the second portion of the wire 212, the second electrical connector 215, and the first electrical connector 214 are arranged on the first surface 241 is retained, and all other metal plating layers except the above-mentioned parts are etched away. At this time, the first portion of the wire 211, the second portion of the wire 212, the second electrical connector 215, and the first electrical connector 214 are arranged on the first surface 241 can be formed on the first surface 241. Similarly, on the second surface 242 of the substrate 240, the metal plating in the other areas on the second surface 242 can be completely etched away except for the metal plating where the portion of the first electrical connector 214 is set on the second surface 242, so as to form the portion of the first electrical connector 214 located on the second surface 242.

[0069] It can be understood that in the above solution, a plating layer can be provided in the via hole of the substrate 240 to form a portion of the first electrical connection member 214 located in the via hole.

[0070] It is understandable that the substrate 240 itself can be an insulating substrate 240, such as a dielectric substrate 240. When the coil 210 is formed on the substrate 240, a metal layer can be plated on the first surface and the second surface of the substrate 240, and the above solution can be formed according to the specific structure of the coil 210.

[0071] The antenna device 200 of the embodiment of the present application can make full use of the metal plating on the substrate 240 to etch the coil 210, the first electrical connector 214 and the second electrical connector 215 on the first surface 241 and the second surface 242 of the substrate 240. The coil 210 is formed on the surface of the substrate 240. The coil 210 does not increase the thickness of the antenna device 200 and the electronic device 100, so that the antenna device 200 and the electronic device 100 can be made lighter and thinner.

[0072] In order to further reduce the thickness of the antenna device 200 and the electronic device 100, the first shielding member 220 or the second shielding member 230 may also be formed on the substrate 240. For example, please refer to Figure 8 , Figure 8 A third structural schematic diagram of an antenna device provided in an embodiment of the present application. When the first portion of the conductive wire 211 and the second portion of the conductive wire 212 are disposed on the first surface 241 of the substrate 240, the second surface 242 of the substrate 240 may include a metal layer, which may form the first shielding member 220 or the second shielding member 230. For example, Figure 8 The middle metal layer forms a first shield 220 .

[0073] It is understandable that the metal layer may be a metal plating layer on the second surface 242 of the substrate 240. That is, when the second surface 242 of the substrate 240 is etched to form the portion of the first electrical connection member 214 located on the second surface 242, the metal plating layer may be retained in the region corresponding to the second portion of the conductive wire 212 (e.g., the lower region of the second surface 242) to form the first shielding member 220 or the second shielding member 230.

[0074] It should be noted that the area corresponding to the second portion of the conductive wire 212 not only refers to the projection area of ​​each coil of the second portion of the conductive wire 212 on the second surface 242 , but also includes the projection area of ​​the interval area between any adjacent coils of the second portion of the conductive wire 212 on the second surface 242 .

[0075] The antenna device 200 of the embodiment of the present application utilizes the metal coating on the second surface 242 of the substrate 240 to form the first shielding component 220 / the second shielding component 230. On the one hand, the metal coating material can be reasonably utilized to reduce material waste; on the other hand, the first shielding component 220 / the second shielding component 230 will not increase the thickness of the antenna device 200, so that the antenna device 200 and the electronic device 100 can be made thinner and lighter.

[0076] The first shielding member 220 / second shielding member 230 formed on the second surface 242 may be disposed around the portion of the first electrical connector 214 disposed on the second surface 242. That is, the portion of the first electrical connector 214 disposed on the second surface 242 and the first shielding member 220 / second shielding member 230 formed on the second surface 242 may be a concentric ring structure, the portion of the first electrical connector 214 disposed on the second surface 242 may be disposed on the inner ring, the first shielding member 220 / second shielding member 230 formed on the second surface 242 may be disposed on the outer ring, and the first electrical connector 214 and the first shielding member 220 / second shielding member 230 are insulated from each other. At this time, the first shielding member 220 / second shielding member 230 will not respond to the performance of the first electrical connector 214, and thus will not affect the radiation performance of the antenna device 200.

[0077] The portion of the first electrical connector 214 disposed on the second surface 242 may not overlap with the first shielding member 220 / second shielding member 230 formed on the second surface 242. That is, the portion of the first electrical connector 214 disposed on the second surface 242 and the first shielding member 220 / second shielding member 230 formed on the second surface 242 are staggered or spaced apart, for example, Figure 8 At this time, on the one hand, the first shielding member 220 / second shielding member 230 formed on the second surface 242 of the substrate can be prevented from affecting the portion of the first electrical connection member 214 located on the second surface 242, so as to ensure the radiation performance of the antenna device 200; on the other hand, the first electrical connection member 214 will not affect the shielding effect of the first shielding member 220 / second shielding member 230 on the strength of the magnetic field generated by the second portion of the conductive wire 212 under the action of the current.

[0078] Among them, please refer to Fig. 9 , Fig. 9 A second structural diagram of an electronic device provided in an embodiment of the present application. The rear shell 150 of the electronic device 100 may include a non-metallic portion 151 and a metal portion 152. For example, the non-metallic portion 151 may be disposed in the upper half of the rear shell 150, and the metal portion 152 may be disposed in the lower half of the rear shell 150.

[0079] The projection of the first portion of the conductive wire 211 on the rear housing 150 may be located on the non-metallic portion 151 , so that the non-metallic portion 151 does not block the transmission of magnetic field lines of the magnetic field generated by the first portion of the conductive wire 211 in the free space.

[0080] It is understandable that the non-metallic portion 151 may be a plate made of non-metallic materials such as plastic or ceramics, and the non-metallic portion 151 may also be a region formed by a hollow structure such as a hole, a cavity, or a gap.

[0081] The projection of the second portion of the conductive wire 212 on the rear housing 150 may be located on the metal portion 152. In this case, the metal portion 152 may form a first shielding member 220 / a second shielding member 230. For example, Fig. 9 The metal part 152 forms a second shielding member 230. The metal part 152 as a shielding member can block the transmission of magnetic field lines of the magnetic field generated by the second part of the conductive wire in the free space, so as to weaken the magnetic field strength of the second coil.

[0082] The electronic device 100 of the embodiment of the present application utilizes the metal portion 152 on the rear housing 150 as the first shielding member 220 / the second shielding member 230 . The first shielding member 220 / the second shielding member 230 does not add any additional components to the rear housing 150 of the electronic device 100 , thereby further achieving a slimmer and lighter electronic device 100 .

[0083] It is understandable that in the above scheme, the rear shell 150 can also be made entirely of non-metallic materials to ensure the radiation performance of the first part of the wire 211. In this case, a first shielding member 220 / second shielding member 230 can be set between the coil 210 and the rear shell 150 to shield the magnetic lines of force of the second part of the wire 212.

[0084] It is understandable that the solutions of the above-mentioned embodiments of the present application can be arbitrarily combined to form a new embodiment solution under the premise of not conflicting with each other, and the new embodiment solution is also within the protection scope of the present application. Figure 8 and Fig. 9 The first shielding member 220 may be a metal plating layer on the second surface 242 of the substrate 240 , and the second shielding member 230 may be a metal portion 152 of the rear housing 150 .

[0085] Please refer again to Fig. 9 The electronic device 100 of the embodiment of the present application may further include a magnetic member 250. The magnetic member 250 may be disposed between the coil 210 and the circuit board 130, and the projection of the magnetic member 250 on the coil 210 may at least partially cover the first portion of the conductive wire 211.

[0086] It is understandable that the magnetic member 250 may be a ferrite magnetic member. The magnetic member 250 may also be other materials with a resistivity much greater than that of metal or alloy magnetic materials and a higher dielectric property.

[0087] In the electronic device 100 of the embodiment of the present application, when the coil 210 is electrically connected to the circuit board 130 to transmit wireless signals, the circuit board 130 or the metal device on the circuit board 130 will generate an induced eddy current in the opposite direction to the transmission direction of the coil 210, and the induced eddy current will suppress the magnetic field strength of the coil 210, thereby affecting the radiation performance of the antenna device 200. In the electronic device 100 of the embodiment of the present application, a magnetic member 250 is arranged between the coil 210 and the circuit board 130, and the magnetic member 250 can bind the magnetic lines of force generated by the coil 210 to the magnetic member 250, so that the magnetic lines of force generated by the coil 210 will not reach the circuit board 130, so that the substrate of the circuit board 130 will not generate reverse induced eddy currents, and the magnetic member 250 can suppress the generation of the induced eddy currents, so that the induced eddy currents will not affect the radiation performance of the antenna device 200.

[0088] Based on the structure of the antenna device 200 described above, the electronic device 100 of the embodiment of the present application may further include a communication chip. Fig.10 , Fig.10This is a third structural diagram of an electronic device provided in an embodiment of the present application, where the communication chip may be a near field communication chip (NFC IC) 260. The coil 210 may be electrically connected to the near field communication chip (NFC IC) 260 so that the coil 210 transmits a near field communication signal.

[0089] Among them, the near field communication chip (NFC IC) 260 can be used to provide a near field communication signal, that is, the near field communication chip (NFC IC) 260 is used to provide a differential excitation current. The differential excitation current may include two current signals, the two current signals have the same amplitude and opposite phases, or it is understood that the two current signals differ in phase by 180 degrees. In addition, the differential excitation current may be a balanced signal. It can be understood that if an analog signal is directly transmitted during the transmission process, it is an unbalanced signal; if the original analog signal is inverted, and then the inverted analog signal and the original analog signal are transmitted at the same time, the inverted analog signal and the original analog signal are called balanced signals. During the transmission process, the balanced signal passes through a differential amplifier, and the original analog signal and the inverted analog signal are subtracted to obtain an enhanced original analog signal. Since the two transmission lines are subject to the same interference during the transmission process, the same interference signal is subtracted during the subtraction process, so the balanced signal has better anti-interference performance.

[0090] It can be understood that the near field communication chip (NFC IC) 260 may include a first differential signal terminal 261 and a second differential signal terminal 262. The first differential signal terminal 261 and the second differential signal terminal 262 may be used to provide a differential excitation current. The first differential signal terminal 261 may be directly or indirectly electrically connected to an electrical connection portion of the coil 210; the second differential signal terminal 262 may also be directly or indirectly electrically connected to another electrical connection portion of the coil 210. Thus, the coil 210 may transmit a differential excitation current.

[0091] For example, Fig.10 As shown, the first differential signal terminal 261 of the near field communication chip (NFC IC) 260 is electrically connected to the first electrical connection member 214 of the coil 210, and the second differential signal terminal 262 is electrically connected to the second electrical connection member 215. At this time, the near field communication chip (NFC IC) 260 and the coil 210 can form a signal loop for transmitting a differential excitation current.

[0092] For another example, one or more conductors may be connected in series between the first differential signal terminal 261 of the near field communication chip (NFC IC) 260 and the first electrical connector 214 of the coil 210, so as to achieve indirect electrical connection between the first differential signal terminal 261 and the first electrical connector 214 of the coil 210. Similarly, one or more conductors may be connected in series between the second differential signal terminal 262 of the near field communication chip (NFC IC) 260 and the second electrical connector 215 of the coil 210, so as to achieve indirect electrical connection between the second differential signal terminal 262 and the second electrical connector 215 of the coil 210.

[0093] For example, please refer to Fig.11 , Fig.11 A fourth structural schematic diagram of an electronic device provided in an embodiment of the present application. The electronic device 100 in an embodiment of the present application may also include a radiator 270 and a ground plane, the ground plane including a first ground portion and a second ground portion spaced apart, and the ground plane forms a conductive path between the first ground portion and the second ground portion. One end of the radiator 270 may be directly or indirectly electrically connected to a differential signal end of a near field communication chip (NFC IC) 260; the other end of the radiator 270 may be directly or indirectly electrically connected to the coil 210.

[0094] For example, Fig.10 As shown, one end of the radiator 270 can be electrically connected to the first differential signal terminal 261 of the near field communication chip (NFC IC) 260, and one end of the radiator 270 can be grounded, for example, it can be electrically connected to the first grounding portion; the first electrical connector 214 of the coil 210 can also be grounded, for example, it can be electrically connected to the second grounding portion, and the second electrical connector 215 of the coil 210 can be electrically connected to the second differential signal terminal 262 of the near field communication chip (NFC IC) 260. Thus, the conductive path of the near field communication chip (NFC IC) 260, the coil 210, the radiator 270 and the ground plane can form a conductive loop, and a differential excitation current can be transmitted.

[0095] It is understandable that in the above embodiment, the other end of the radiator 270 may also be directly electrically connected to the first electrical connector 214 of the coil 210 without passing through the ground plane.

[0096] It is understandable that the radiator 270 may be a free metal branch on the middle frame 120 of the electronic device 100; the radiator 270 may also be a radiator on the circuit board 130 of the electronic device 100; the radiator 270 may also be a radiator formed by other conductors on the electronic device 100. The specific form of the radiator 270 is not limited in the embodiment of the present application.

[0097] It can be understood that the electronic device of the embodiment of the present application may include one radiator 270 or multiple radiators 270, and the multiple radiators 270 may be connected in series / parallel between the near field communication chip (NFC IC) 260 and the coil 210 to increase the radiation area.

[0098] In the electronic device of the embodiment of the present application, when one or more conductors are connected in series between the first differential signal terminal 261 and the first electrical connector 214 and / or between the second differential signal terminal and the second electrical connector 215, the conductor and the coil 210 can form a common antenna. Under the action of the differential excitation current, the coil 210 can form a near-field communication radiation field, and the conductor can form another near-field communication radiation field. Under the action of the two near-field communication radiation fields, the radiation area of ​​the antenna device 200 can be increased, and the radiation performance of the antenna device 200 can be further improved.

[0099] Among them, please refer to Fig.12 , Fig.12 A fifth structural diagram of an electronic device provided in an embodiment of the present application. The communication chip may also be a non-near field communication chip. The non-near field communication chip may be an IC chip, and the non-near field communication chip (IC) 280 may be used to provide a non-near field communication signal. The coil 210 may be electrically connected to the non-near field communication chip (IC) 280 so that the coil 210 transmits a non-near field communication signal.

[0100] It is understandable that the non-near field communication signal may be an unbalanced signal, including but not limited to a cellular network signal, a Wireless Fidelity (Wi-Fi) signal, a Global Positioning System (GPS) signal, and a Bluetooth (BT) signal. Accordingly, the non-near field communication chip (IC) 280 may be a cellular communication chip for providing a cellular network signal; the non-near field communication chip (IC) 280 may be a Wi-Fi chip for providing a Wi-Fi signal; the non-near field communication chip (IC) 280 may be a GPS chip for providing a GPS signal; and the non-near field communication chip (IC) 280 may also be a BT chip for providing a BT signal.

[0101] It can be understood that the non-near field communication chip (IC) 280 can be electrically connected to an electrical connection part of the coil 210, for example, the non-near field communication chip (IC) 280 is electrically connected to the first electrical connection part 214. At this time, the second electrical connection part 215 of the coil 210 can be grounded to realize the transmission of the non-near field communication signal.

[0102] It can be understood that the above is only an illustrative example of the electronic device 100. The electronic device 100 of the embodiment of the present application may also include components such as a camera, a sensor, an acoustic-to-electric conversion device, etc. These components can be found in the description of the relevant technology and will not be repeated here.

[0103] The antenna device and electronic device provided in the embodiments of the present application are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the present application. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present application.

Claims

1. An antenna device, characterized in that: include: A coil, the coil comprising at least a first portion of conductive wires and a second portion of conductive wires arranged opposite to each other, the currents in the first portion of conductive wires and the second portion of conductive wires are transmitted in opposite directions; wherein the spacing between two adjacent turns of conductive wires in the second portion of conductive wires is smaller than the spacing between two adjacent turns of conductive wires in the first portion of conductive wires; a first shielding member, the first shielding member being disposed on a first side of the coil and spaced apart from the coil, wherein a projection of the first shielding member on the coil at least partially covers the second portion of the conductive wire, so as to shield and weaken the strength of a magnetic field generated by the second portion of the conductive wire under the action of an electric current; and A second shielding member is arranged on a second side of the coil opposite to the first side, and a projection of the second shielding member on the coil at least partially covers the second portion of the conductive wire to shield and weaken the strength of the magnetic field generated by the second portion of the conductive wire under the action of current.

2. The antenna device according to claim 1, characterized in that: A radial width of the second portion of conductive lines is different from a radial width of the first portion of conductive lines.

3. The antenna device according to claim 1, characterized in that: Also includes: The substrate comprises a first surface and a second surface which are arranged opposite to each other, the first part of the conductive wires and the second part of the conductive wires are arranged on the first surface, and the second surface comprises a metal layer, and the metal layer forms the first shielding member.

4. The antenna device according to claim 3, characterized in that: The substrate further comprises: at least two via holes arranged at intervals, each of the via holes passing through the first surface and the second surface; The antenna device further comprises: a first electrical connector, one end of which is electrically connected to a free end of the coil, and the other end of which passes through each of the via holes in sequence and is disposed on the first surface; and A second electrical connector, one end of the second electrical connector is electrically connected to the other free end of the coil, and the other end of the second electrical connector is disposed on the first surface.

5. The antenna device according to claim 4, characterized in that: The portion of the first electrical connection component disposed on the second surface is staggered with the first shielding component.

6. The antenna device according to claim 1, characterized in that: A central area is formed between the first portion of the conductive wires and the second portion of the conductive wires, and a width of the central area is between 2 mm and 10 mm.

7. The antenna device according to claim 1, characterized in that: Also includes: A near field communication chip, the near field communication chip comprising a first differential signal terminal and a second differential signal terminal, the first differential signal terminal and the second differential signal terminal are used to provide a differential excitation current; A ground plane, comprising a first ground portion and a second ground portion disposed at intervals, wherein the ground plane forms a conductive path between the first ground portion and the second ground portion; and a radiator, one end of the radiator being electrically connected to the first ground portion, and the other end of the radiator being electrically connected to the first differential signal end; One end of the coil is electrically connected to the second grounding portion, and the other end of the coil is electrically connected to the second differential signal end; wherein, The radiator, the conductive path and the coil together form a conductive loop for transmitting the differential excitation current.

8. The antenna device according to claim 1, characterized in that: Also includes: A non-near field communication chip, wherein the non-near field communication chip is used to provide a non-near field communication excitation signal; The coil is electrically connected to the non-near field communication chip, and the coil is used to transmit the non-near field communication excitation signal.

9. An electronic device, characterized in that: include: An antenna device, wherein the antenna device is the antenna device according to any one of claims 1 to 8; and A circuit board is located at a side of the first shielding component away from the coil. A signal source is provided on the circuit board. The signal source is electrically connected to the coil so that the coil transmits a wireless signal.

10. The electronic device according to claim 9, characterized in that: The electronic device further comprises: The rear shell includes a metal portion, a projection of the second portion of the conductive wire on the rear shell is at least partially located on the metal portion, and the metal portion forms the second shielding member.

11. The electronic device according to claim 10, characterized in that: The rear housing also includes: The non-metallic portion, a projection of the first portion of the conductive wire on the rear shell is at least partially located on the non-metallic portion.

12. The electronic device according to claim 9, characterized in that: Also includes: A magnetic component is disposed between the coil and the circuit board, and a projection of the magnetic component on the coil at least partially covers the first portion of the conductive wire.

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