Antenna and electronic device

Abstract

The present disclosure relates to an antenna and an electronic device. The antenna comprises a first conductive member and a second conductive member connected to the first conductive member. The first conductive member and the second conductive member enclose a cavity. The cavity comprises two adjacent openings. The antenna of the present disclosure encloses a cavity with two adjacent openings by the first conductive member and the second conductive member. The feed point of the antenna is located at the adjacent position of the two openings, thereby forming a half-cavity antenna. The half-cavity antenna can meet the low-frequency use case, reduce the size and occupied volume of the antenna, and reduce the cost and production risk.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of antenna design, and in particular, to an antenna and an electronic device. BACKGROUND

[0002] With the continuous development of communication technology, electronic devices such as mobile phones have developed from carrying simple functions to supporting rich media such as voice, data, music, video, etc., and can also be extended to install various applications APP to meet people's various needs.

[0003] At the same time, the production and manufacturing process is constantly improving, and consumers are increasingly paying attention to the appearance and cost of mobile phone products, and mobile phones are constantly developing towards miniaturization, intelligence, thinness, and narrow frame.

[0004] Therefore, the design of the antenna is often affected by factors such as the appearance, structure, circuit board layout, and metal parts of the mobile phone, and the development difficulty is increasing. SUMMARY

[0005] The present disclosure provides an antenna and an electronic device to solve the problems in the related art.

[0006] In a first aspect, an embodiment of the present disclosure provides an antenna, comprising: a first conductive part and a second conductive part connected to the first conductive part, the first conductive part and the second conductive part enclosing a cavity, the cavity comprising two adjacent openings, and a feed point of the antenna being located at the adjacent openings.

[0007] Optionally, further comprising a tuning circuit board arranged at the adjacent openings, the tuning circuit board being provided with a connecting line for connecting external devices.

[0008] Optionally, the tuning circuit board is provided with a matching circuit, and the matching circuit comprises a capacitor and an inductor.

[0009] Optionally, the first conductive part is provided with a functional device, and the second conductive part is provided with a hollow part corresponding to the position of the functional device.

[0010] Optionally, the first conductive part is provided with a receiving cavity corresponding to the position of the functional device, and the functional device is embedded in the receiving cavity.

[0011] Optionally, a surface of the functional device is located in the receiving cavity; or

[0012] The surface of the functional device is flush with the surface of the first conductive part.

[0013] Optionally, an area of the hollow part is greater than an area of the receiving cavity, and a projection of the hollow part on the first conductive part covers the receiving cavity.

[0014] Optionally, a distance between an outer edge of a projection of the hollowed-out portion on the first conductive member and an outer edge of the accommodating cavity is not less than 2 mm.

[0015] Optionally, the functional device is provided with a flexible circuit board, and at least one magnetic bead is arranged on the flexible circuit board.

[0016] Optionally, the flexible circuit board is arranged on a side of the functional device opposite to the second conductive member.

[0017] Optionally, the functional device comprises a loudspeaker or a battery; and / or

[0018] The number of the functional devices is one or more, and the number of the hollowed-out portions corresponds to the number of the functional devices.

[0019] Optionally, the first conductive member is one of a metal shell, a conductive support, a circuit board and a conductive cover, and the second conductive member is another one of the metal shell, the conductive support, the circuit board and the conductive cover.

[0020] Optionally, the first conductive member is a metal shell, and the second conductive member is a conductive support; the conductive support comprises a support and a conductive layer wrapped around the support; the conductive layer is connected with the metal shell, and the support, the conductive layer and the metal shell enclose the cavity.

[0021] Optionally, the support is provided with a notch portion corresponding to an abutment of the two openings, and the conductive layer is provided with a second conductive connecting member corresponding to the notch portion; and / or

[0022] The support is provided with at least one connecting hole in a circumferential direction, and the antenna further comprises a fastener penetrating through the connecting hole and connected with the metal shell; and / or

[0023] The side of the conductive layer opposite to the metal shell is provided with a third conductive connecting member; and / or

[0024] The support comprises a plastic support.

[0025] Optionally, the second conductive member comprises a main body portion and a bent portion; the main body portion is provided with two adjacent side edges; the bent portion is formed at other edges of the main body portion and is bent towards the first conductive member; and the bent portion is connected with the first conductive member.

[0026] The main body portion, the bent portion and the first conductive member enclose the cavity, and the two adjacent side edges of the main body portion and the first conductive member form the two openings.

[0027] Optionally, the bending portion comprises a first bending segment and a second bending segment, the first bending segment bends from the main body portion in a first direction, and the second bending segment bends from the first bending segment in a second direction, and the second bending segment is connected with the first conductive member.

[0028] Optionally, the second bending segment is provided with a plurality of first conductive connecting members at intervals in a length direction, and the first conductive connecting members are connected with the first conductive member.

[0029] Optionally, the bending portion surrounds other edges of the main body portion except for two side edges corresponding to the two openings; and the bending portion is provided with a plurality of first conductive connecting members at intervals in a length direction, and the first conductive connecting members are connected with the first conductive member.

[0030] Optionally, the main body portion comprises a first surface and a second surface opposite to the first surface, the first surface is arranged to face away from the first conductive member compared with the second surface; and the bending portion extends from one side of the first surface to one side of the second surface and at least partially protrudes from the second surface.

[0031] Optionally, the main body portion is rectangular, two adjacent side edges of the main body portion are left empty, and the other two adjacent side edges of the main body portion are sequentially formed with a first bending portion and a second bending portion, and the first bending portion and the second bending portion are both connected with the first conductive member; or

[0032] The first conductive member comprises a bottom wall and a side wall connected with the bottom wall, the main body portion is rectangular, a first side edge of the main body portion is formed with a first bending portion, the first bending portion is connected with the bottom wall, a second side adjacent to the first side of the main body portion is connected with the side wall, and a third side edge and a fourth side edge of the main body portion are left empty; and the main body portion, the first bending portion, the side wall and the bottom wall enclose the cavity.

[0033] Optionally, the second conductive member is provided with a notch portion at a position corresponding to the abutment of the two openings, and the notch portion is provided with a second conductive connecting member; and / or

[0034] The second conductive member is provided with at least one connecting hole in a circumferential direction, and the antenna further comprises a fastener, the fastener is arranged through the connecting hole and connected with the first conductive member; and / or

[0035] The second conductive member is provided with a third conductive connecting member on a side facing away from the first conductive member.

[0036] Optionally, the two adjacent openings comprise a first opening and a second opening.

[0037] at least part of the first opening is closed; or

[0038] at least part of the second opening is closed; or

[0039] at least part of the first opening is closed, and at least part of the second opening is closed.

[0040] Optionally, a matching circuit is further included and arranged at any of the openings, the matching circuit comprising a tuning switch.

[0041] Optionally, a feeding point of the antenna is located at the abutment of the two openings.

[0042] In a second aspect, the embodiments of the present disclosure provide an electronic device, comprising a display screen and the antenna as described in the first aspect, the display screen being arranged on the first conductive member and connected with the second conductive member.

[0043] The technical solutions provided by the embodiments of the present disclosure can have the following beneficial effects:

[0044] As can be seen from the above embodiments, the antenna of the present disclosure forms a cavity with two adjacent openings by the first conductive member and the second conductive member, and the feeding point of the antenna is located at the abutment of the two openings, thereby constituting a half-cavity antenna. Compared with the cavity antenna with only one opening in the related art, the same low-frequency use case can be met, and the size and occupied use volume of the antenna can be reduced, and the cost and mass production risk can be reduced.

[0045] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0046] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present disclosure and, together with the specification, serve to explain the principles of the present disclosure.

[0047] Figure 1 is a partial cross-sectional schematic diagram of an electronic device according to an exemplary embodiment.

[0048] Figure 2 is a top view schematic diagram of an electronic device according to an exemplary embodiment.

[0049] Figure 3 and Figure 4 are schematic diagrams of matching circuits of circuit boards according to different exemplary embodiments.

[0050] Figure 5is a top view schematic diagram of an electronic device according to another exemplary embodiment.

[0051] Figure 6 is a schematic diagram of a flexible circuit board of a functional device according to an exemplary embodiment.

[0052] Figure 7 is a back view schematic diagram of a support and a conductive layer according to an exemplary embodiment.

[0053] Figure 8 is a front view schematic diagram of a support and a conductive layer according to an exemplary embodiment.

[0054] Figures 9 to 10 is a radiation efficiency and passive efficiency diagram of an antenna obtained by simulation according to an exemplary embodiment.

[0055] Figure 11 is a current distribution diagram of an antenna according to an exemplary embodiment. DETAILED DESCRIPTION

[0056] The exemplary embodiments will be described in detail herein below with reference to the accompanying drawings. In the following description, the same drawings refer to the same or similar elements. The following exemplary embodiments described in the exemplary embodiments do not represent all the embodiments consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0057] The terms used in the present disclosure are merely used to describe particular embodiments, and are not intended to limit the present disclosure. As used in the present disclosure and the appended claims, singular forms "a," "an" and "the" are intended to include plural forms, unless the context clearly indicates other meanings. It will be further understood that the term "and / or" used herein means and includes any or all possible combinations of one or more associated listed items.

[0058] In order to facilitate understanding of the technical solutions of the present disclosure, the antenna and the electronic device of the present disclosure are described in detail below with reference to the accompanying drawings. The features in the following embodiments and implementation manners can be combined with each other without conflict.

[0059] The antenna provided by the embodiments of the present disclosure can be applied to electronic products such as mobile phones, tablets, notebooks, smart glasses, smart watches, smart bracelets, wearable devices, and the like. The antenna comprises a first conductive member and a second conductive member connected with the first conductive member, and the first conductive member and the second conductive member enclose a cavity. In this way, a cavity with two adjacent openings is enclosed by the first conductive member and the second conductive member, thereby forming a half-cavity antenna (which can be understood as a half-cavity mode healthy antenna). Compared with the cavity antenna with only one opening in the prior art, the same low-frequency use case can be met, the size and occupied use volume of the antenna can be reduced, and the cost and mass production risk can be reduced.

[0060] Optionally, the first conductive member is one of a metal shell, a conductive support, a circuit board, and a conductive cover, and the second conductive member is another one of the metal shell, the conductive support, the circuit board, and the conductive cover. Referring to FIGS. 1 and 2, in the present embodiment, the first conductive member is a metal shell 10, and the second conductive member is a conductive support 23, that is, the antenna comprises the metal shell 10 and the conductive support 23 connected with the metal shell 10. The conductive support 23 and the metal shell 10 enclose a cavity 41, and the cavity 41 comprises two adjacent openings (indicated as A and B in the figure). It should be noted that in other examples, the metal shell can be part of the shell of an electronic product. The circuit board can be a PCB circuit board, an FPC flexible circuit board, or the like. In other examples, the metal shell and the circuit board can also enclose the cavity antenna. The metal shell and the conductive cover can also enclose the cavity antenna. The conductive support and the circuit board can also enclose the cavity antenna. The conductive cover and the circuit board can also enclose the cavity antenna. Figure 1 Figure 2 Referring to FIGS. 1 and 2, in the present embodiment, the first conductive member is a metal shell 10, and the second conductive member is a conductive support 23, that is, the antenna comprises the metal shell 10 and the conductive support 23 connected with the metal shell 10. The conductive support 23 and the metal shell 10 enclose a cavity 41, and the cavity 41 comprises two adjacent openings (indicated as A and B in the figure). It should be noted that in other examples, the metal shell can be part of the shell of an electronic product. The circuit board can be a PCB circuit board, an FPC flexible circuit board, or the like. In other examples, the metal shell and the circuit board can also enclose the cavity antenna. The metal shell and the conductive cover can also enclose the cavity antenna. The conductive support and the circuit board can also enclose the cavity antenna. The conductive cover and the circuit board can also enclose the cavity antenna.

[0061] As can be seen from the above embodiments, the antenna of the present disclosure encloses a cavity with two adjacent openings by the conductive support and the metal shell, thereby forming a half-cavity antenna (which can be understood as a half-cavity mode healthy antenna). Compared with the cavity antenna with only one opening in the prior art, the same low-frequency use case can be met, the size and occupied use volume of the antenna can be reduced, and the cost and mass production risk can be reduced. Optionally, the size of the cavity antenna with only one opening in the prior art is 155 mm*40 mm, and the size of the antenna can be reduced to 90 mm*40 mm by using the technical solution of the present disclosure, thereby reducing the use volume of the antenna by 42%.

[0062] In some optional embodiments, the two adjacent openings comprise a first opening A and a second opening B. At least part of the first opening A is closed. Alternatively, at least part of the second opening B is closed. Alternatively, at least part of the first opening A is closed, and at least part of the second opening B is closed.​

[0063] Understandably, when neither the first opening A nor the second opening B has a closed portion, the sum of the lengths of the two openings is the sum of the length 'a' of the first opening A and the length 'b' of the second opening B, i.e., a + b. With the above configuration, at least one of the first opening A and the second opening B can be semi-closed. That is, the lengths of the two openings are adjustable, forming cavity antennas with different opening sizes, which can be used to adjust the antenna's frequency band, thereby adapting to signal radiation in various frequency bands.

[0064] In some alternative embodiments, the antenna may further include a tuning circuit board disposed adjacent to the two openings, the tuning circuit board having connecting lines for connecting external devices. The tuning circuit board can tune the semi-cavity mode healthy antenna. When the antenna is applied to electronic devices such as mobile phones, the tuning circuit board can be connected to the motherboard of the electronic device via the connecting lines to achieve signal linking between the antenna and the motherboard. Optionally, the tuning circuit board may be a printed circuit board (PCB), and the connecting lines may be cable lines.

[0065] Further, see Figure 3 and Figure 4 The diagram illustrates two embodiments of the matching circuit for a circuit board. The tuning circuit board may include a matching circuit comprising a capacitor and an inductor. Optionally, the matching circuit may further comprise distributed capacitance and distributed inductance connected in series and parallel, allowing the tuning circuit board to tune the half-cavity bulk mode healthy antenna. In other examples, the matching circuit may be located at any opening, and may include a tuning switch; that is, the matching circuit can be positioned at an appropriate location within any opening, and may further include a tuning switch for antenna tuning and frequency selection.

[0066] See Figure 5 As shown, in some optional embodiments, the first conductive element is provided with a functional device 50, and the second conductive element has a cutout 24 corresponding to the position of the functional device 50. It can be understood that, taking the first conductive element as a metal housing and the second conductive element as a conductive support as an example, the metal housing 10 is provided with the functional device 50, and the conductive support 23 has a cutout 24 corresponding to the position of the functional device 50. Optionally, when the antenna is applied to electronic devices such as mobile phones, the functional device 50 may include a speaker (SPK box), a battery, or other electronic components inside the electronic device; this disclosure does not limit this. It should be noted that when the functional device is located in the middle region of the first conductive element, the cutout may be a corresponding through hole. When the functional device is located in the edge region of the first conductive element, the cutout may be a corresponding slot.

[0067] When antennas are used in electronic devices such as mobile phones, they may conflict with the positions of functional components mounted on the metal casing. The dense current accumulation at the magnets of these functional components can affect antenna performance. This disclosure addresses this issue by creating a cutout in the conductive support corresponding to the position of the functional component mounted on the metal casing, thus avoiding interference with the functional component's circuit path. Figure 5 The dashed box in the middle shows part of the edge current path of the functional device, current direction, and potential length, which can reduce the impact of the functional device on the antenna. Through the technical solution disclosed in this invention, the size of the antenna cavity can be made as 155mm long, 40mm wide, and 3mm high, forming a low-frequency cavity mode antenna that can be adapted to many antenna frequency bands.

[0068] In some optional embodiments, the first conductive element has a receiving cavity corresponding to the position of the functional device 50, and the functional device 50 is embedded in the receiving cavity. It is understood that, taking the first conductive element as a metal housing and the second conductive element as a conductive support as an example, the metal housing 10 has a receiving cavity corresponding to the position of the functional device 50, and the functional device 50 is embedded in the receiving cavity. Thus, embedding the functional device 50 in the receiving cavity reduces the space occupied by the functional device 50 within the cavity 41 (i.e., the internal space of the antenna body), thereby further reducing the impact of the functional device on the antenna performance. It is understood that the number of functional devices 50 can be one or more. Correspondingly, the number of cutouts 24 corresponds to the number of functional devices 50, and the number of receiving cavities corresponds to the number of functional devices 50, ensuring that the conductive support 23 avoids each functional device 50.

[0069] The surface of the functional device 50 is located within the receiving cavity. Thus, the functional device 50 does not occupy any space inside the cavity 41. Alternatively, the surface of the functional device 50 is flush with the surface of the first conductive element. It can be understood that, taking a metal casing as the first conductive element and a conductive support as the second conductive element, the surface of the functional device 50 is flush with the surface of the metal casing 10. This prevents the formation of a depression on the surface of the metal casing 10, allowing the internal space of the antenna body to be as regular and complete as possible, which is beneficial for improving antenna performance.

[0070] In some optional embodiments, the area of the hollowed-out portion 24 is greater than the area of the accommodating cavity, and the projection of the hollowed-out portion 24 on the first conductive member covers the accommodating cavity. It can be understood that, taking the example that the first conductive member is a metal shell and the second conductive member is a conductive support, the area of the hollowed-out portion 24 is greater than the area of the accommodating cavity, and the projection of the hollowed-out portion 24 on the metal shell 10 covers the accommodating cavity. In this way, the hollowed-out portion 24 can completely avoid the accommodating cavity and the functional device 50 arranged in the accommodating cavity, so as to minimize the influence of the functional device 50 on the antenna. Alternatively, the interval distance between the outer edge of the projection of the hollowed-out portion 24 on the metal shell 10 and the outer edge of the accommodating cavity is not less than 2 mm, which can effectively avoid the inner core space of the functional device 50 by the conductive support 23, and reduce the influence of the functional device on the antenna. It can be understood that the surface of the conductive support 23 can be paved with a copper sheet as a conductive layer, and the hollowed-out portion 24 is designed in the above-mentioned size, so as to avoid the copper sheet by more than 2 mm around the functional device, and reduce the influence and interference on the antenna.

[0071] Referring to Figure 6 As shown in some optional embodiments, the functional device 50 is provided with a flexible circuit board 51, and at least one magnetic bead 52 is arranged on the flexible circuit board 51, which can solve the crosstalk problem between the functional device and the antenna, and further reduce the influence of the functional device on the antenna. It can be understood that the magnetic bead has high resistivity and magnetic permeability, which is equivalent to the series connection of resistance and inductance, and can be used to absorb ultra-high frequency signals, eliminate RF noise existing in the transmission line structure (circuit), suppress high-frequency noise and peak interference on the signal line and power line, and also has the ability to absorb electrostatic pulses. Alternatively, the flexible circuit board 51 can be arranged on the side of the functional device 50 facing away from the second conductive member. It can be understood that, taking the example that the first conductive member is a metal shell and the second conductive member is a conductive support, the flexible circuit board 51 is arranged on the side of the functional device 50 facing away from the conductive support 23, and is arranged against the metal shell. The magnetic bead 52 can be connected in series in the circuit of the flexible circuit board 51. For example, when the flexible circuit board 51 has one wire, the wire is connected in series with one magnetic bead 52. When the flexible circuit board 51 has multiple wires, each wire is connected in series with one magnetic bead 52. In this embodiment, the flexible circuit board 51 has two wires, and the number of magnetic beads 52 is two. It should be noted that the number of magnetic beads 52 can be set according to actual needs, and the present disclosure does not limit this.

[0072] In some alternative embodiments, the second conductive member comprises a main body portion and a bending portion, the main body portion leaves two adjacent side edges, and the bending portion is formed at other edges of the main body portion and is bent towards the first conductive member, and the bending portion is connected with the first conductive member. The main body portion, the bending portion and the first conductive member enclose the cavity, and two openings are formed between the two adjacent side edges left by the main body portion and the first conductive member. In this way, the connection between the second conductive member and the first conductive member is achieved by the structure of the bending portion. Optionally, the bending portion comprises a first bending segment and a second bending segment, the first bending segment is bent from the main body portion in a first direction, and the second bending segment is bent from the first bending segment in a second direction, and the second bending segment is connected with the first conductive member.

[0073] In some alternative embodiments, the main body portion comprises a first surface and a second surface opposite to the first surface, and the first surface is arranged to face away from the first conductive member compared with the second surface. The bending portion extends from one side of the first surface to one side of the second surface and at least partially protrudes from the second surface. In this way, the stability of the second conductive member can be improved.

[0074] In some alternative embodiments, the main body portion is rectangular, the main body portion leaves two adjacent side edges, and the other two adjacent side edges of the main body portion are sequentially formed with a first bending portion and a second bending portion, and the first bending portion and the second bending portion are both connected with the first conductive member. The main body portion, the first bending portion, the second bending portion and the first conductive member enclose the cavity. In this way, the two side edges of the main body portion form the bending portions connected with the first conductive member, and the two-side second conductive member forms a half-cavity structure matched with the one-side first conductive member.

[0075] In another case, the first conductive member comprises a bottom wall and a side wall connected with the bottom wall, the main body portion is rectangular, a first side edge of the main body portion is formed with a first bending portion, the first bending portion is connected with the bottom wall, a second side adjacent to the first side of the main body portion is connected with the side wall, and the main body portion leaves a third side edge and a fourth side edge adjacent to each other. The main body portion, the first bending portion, the side wall and the bottom wall enclose the cavity. In this way, the one-side edge of the main body portion forms the bending portion connected with the bottom wall, and the one-side second conductive member forms a half-cavity structure matched with the two-side first conductive member.

[0076] In some optional embodiments, the second bending section is provided with a plurality of first conductive connectors spaced along the length direction, and the first conductive connectors are connected with the first conductive member. In this way, the electrical connection between the second conductive member and the first conductive member is realized through the first conductive connectors. Optionally, the bending section surrounds the other edges of the main body section except the two side edges corresponding to the two openings. The bending section is provided with a plurality of first conductive connectors spaced along the length direction, and the first conductive connectors are connected with the first conductive member.

[0077] In some optional embodiments, the second conductive member is provided with at least one connecting hole in the circumferential direction, and the antenna further comprises a fastener, which is threaded through the connecting hole and connected with the first conductive member. In this way, the stability of the connection between the first conductive member and the second conductive member can be improved.

[0078] In some optional embodiments, the feed point of the antenna is located at the abutting position of the two openings, so that a better current effect can be achieved. Optionally, the second conductive member is provided with a notch portion at the abutting position of the two openings, and the notch portion is provided with a second conductive connector, which can serve as the feed point of the antenna.

[0079] Further, the side of the second conductive member opposite to the first conductive member can be provided with a third conductive connector. When the antenna is applied to an electronic device with a display screen, the third conductive connector can be used to connect with the display screen and serve as a ground, thereby reducing the clutter, reducing the interference to the display screen, and improving the efficiency of the antenna.

[0080] In the following, the antenna of the present disclosure is described in detail by taking the first conductive member as a metal shell and the second conductive member as a conductive bracket. It should be noted that the features described below are also applicable when the first conductive member and the second conductive member adopt other structures such as conductive covers and circuit boards.

[0081] Referring to FIGS. 1 to 5, Figure 1 , Figure 7 and Figure 8 , Figure 7 is a back view schematic diagram of the bracket and the conductive layer according to an exemplary embodiment, i.e., the side of the conductive layer facing the metal shell. Figure 8is a front view of the bracket and the conductive layer according to an exemplary embodiment, that is, the side of the conductive layer facing away from the metal shell. In some optional embodiments, the conductive bracket 23 can include the bracket 20 and the conductive layer 30 wrapped around the bracket 20, and the hollowed part 24 penetrates the conductive layer 30 and the bracket 20. The conductive layer 30 is connected with the metal shell 10, and the bracket 20, the conductive layer 30 and the metal shell 10 enclose the cavity 41. By using the structure of the conductive layer, the flexibility of antenna performance debugging in the research and development stage can be increased, and the sample making period can be shortened. Optionally, the bracket 20 can include a plastic bracket or a bracket made of other insulating materials, which can support the conductive layer 30 and increase the stability of the conductive layer 30. The conductive layer 30 can include a flexible printed circuit (FPC) or other conductive layers, such as a laser direct structuring (LDS) laser forming process layer, a printing direct structure (PDS) transfer process layer, etc.

[0082] In some optional embodiments, the conductive layer 30 includes a main body part 31 and a bent part 32, the main body part 31 is wrapped around the bracket 20, the main body part 31 leaves two adjacent side edges, the bent part 32 is formed at the other edges of the main body part 31 and is bent towards the metal shell 10, and the bent part 32 is connected with the metal shell 10. The main body part 31, the bracket 20, the bent part 32 and the metal shell 10 enclose the cavity 41, and the two adjacent side edges left by the main body part 31 form two openings between the metal shell 10. Optionally, the metal shell 10 can include a bottom wall 11 and a side wall 12 connected with the bottom wall 11, and the conductive layer 30 is connected with the bottom wall 11. The bottom wall 11 and the side wall 12 can be integrally formed to form a unibody metal back shell. It should be noted that the size of the opening can also be adjusted according to actual needs to match different antenna frequency bands. For example, the edge of the main body part near the opening can be further bent to form a smaller bent part, so as to change and control the length and width of the opening, and the degree of bending can be set according to actual needs.

[0083] Optionally, the bracket 20 is rectangular, the main body part 31 of the conductive layer 30 is rectangular, three edges of the main body part 31 are bent to form the bent part 32 and are connected with the metal shell 10, and the other edge is reserved as an opening, so as to realize the structure of the three edges of the conductive layer connected with the metal shell and the one edge reserved as an opening, and form a completely sealed cavity, so as to improve the overall antenna cavity performance.

[0084] In some optional embodiments, the bending portion 32 comprises a first bending segment 321 and a second bending segment 322, the first bending segment 321 is bent from the main body portion 31 along a first direction Y, the second bending segment 322 is bent from the first bending segment 321 along a second direction X, and the second bending segment 322 is connected with the metal shell 10. In this way, the connection between the conductive layer and the metal shell is achieved by the structural form of the bending portion. Moreover, the design of the bending portion can increase the flexibility of debugging and reduce the proofing period. Optionally, the first direction Y is perpendicular to the second direction X, the first direction Y is understood as the longitudinal direction in Figure 1 the drawings, and the second direction X is understood as the transverse direction in Figure 1 the drawings.

[0085] Further, the second bending segment 322 is spaced apart along the length direction and is provided with a plurality of first conductive connecting members 33, the first conductive connecting members 33 are connected with the metal shell 10, that is, the first conductive connecting members 33 are connected between the second bending segment 322 and the metal shell 10, so as to achieve the electrical connection between the conductive layer 30 and the metal shell 10. The main body portion 31, the support 20, the first bending segment 321, the second bending segment 322, the first conductive connecting members 33 and the metal shell 10 enclose the cavity 41. In this way, the conductive layer is connected with the metal shell through the first conductive connecting members, so as to improve the sealing performance and the reliability of the electrical connection. Optionally, the first conductive connecting members 33 can be gold-plated conductive foam, conductive silica gel, conductive cloth and the like which are pasted on the second bending segment 322 of the conductive layer 30. It can be understood that the conductive layer 30 is connected with the metal shell 10 through the first conductive connecting members 33, so as to achieve the electrical connection between the conductive layer 30 and the metal shell 10, and form the cavity 41 enclosed by the conductive layer 30, the first conductive connecting members 33 and the metal shell 10 in a narrow space.

[0086] Optionally, the bending portion 32 is arranged around the other edges of the main portion 31 except the two edges corresponding to the two openings. The first conductive connectors 33 are arranged along the length direction and spaced apart from each other. The first conductive connectors 33 are connected to the metal shell 10, thereby realizing the electrical connection between the conductive layer 30 and the metal shell 10. The main portion 31, the bracket 20, the bending portion 32, the first conductive connectors 33, and the metal shell 10 enclose the cavity 41. The first conductive connectors 33 can be one or more. When the first conductive connectors 33 are more than one, the first conductive connectors 33 can be arranged around the edges of the cavity antenna except the edges of the main portion 31 corresponding to the two openings, thereby improving the performance of the antenna. When the first conductive connector 33 is one, the first conductive connector 33 is annularly arranged around the edges of the main portion 31 except the edges corresponding to the two openings. For example, the bracket 20 is rectangular, the main portion 31 of the conductive layer 30 is rectangular, the edges of three sides of the main portion 31 are bent to form the bending portion 32 and are connected to the metal shell 10, and the edge of the other side is provided with an opening. The bending portion 32 is arranged around the other three edges of the main portion 31 except the edges corresponding to the two openings. The first conductive connector 33 is annularly connected between the bending portion 32 and the metal shell 10, thereby improving the sealing performance and the reliability and stability of the electrical connection.

[0087] In some optional embodiments, the bracket 20 includes a first surface and a second surface opposite to the first surface, and the first surface is arranged away from the metal shell 10 compared with the second surface. The main portion 31 is wrapped around the first surface, and the bending portion 32 extends from one side of the first surface to one side of the second surface and at least partially protrudes from the second surface. It can be understood that the first surface is away from the metal shell 10, the second surface is close to the metal shell 10, the conductive layer 30 is wrapped around the side of the bracket 20 away from the metal shell 10, and the bending portion 32 wraps the bracket 20 after being bent from the main portion 31, thereby improving the stability of the bracket and the conductive layer.

[0088] In some optional embodiments, the metal shell 10 includes a bottom wall 11 and a side wall 12 connected to the bottom wall 11, and the functional device 50 is arranged on the bottom wall 11. The bottom wall 11 can be provided with the accommodating cavity. The cavity 41 enclosed by the conductive layer 30 and the metal shell 10 can be arranged in an area of the bottom wall 11 away from the side wall 12, and the cavity 41 is formed by the conductive layer 30 cooperating with the bottom wall 11. The cavity 41 enclosed by the conductive layer 30 and the metal shell 10 can also be arranged in a corner area of the bottom wall 11 close to the side wall 12, and the cavity 41 is formed by the conductive layer 30 cooperating with the bottom wall 11 and the side wall 12. The following cases can be included:

[0089] (1) The main body 31 can be rectangular, and the main body 31 leaves two adjacent side edges unconnected, and the other two adjacent side edges of the main body 31 are sequentially formed with a first bending portion and a second bending portion, and the first bending portion and the second bending portion are connected with the metal shell 10. The main body 31, the support 20, the first bending portion, the second bending portion, the third bending portion, and the metal shell 10 enclose the cavity 41. It can be understood that the first bending portion and the second bending portion are connected with the bottom wall 11. The main body 31, the first bending portion, the second bending portion, and the bottom wall 11 enclose the cavity 41. That is, the cavity 41 is arranged in the area of the bottom wall 11 away from the side wall 12. The two side edges of the main body 31 form bending portions connected with the bottom wall 11, forming a half-cavity structure of one side of the conductive layer cooperating with two sides of the shell.

[0090] (2) The main body 31 can be rectangular, and the first side edge of the main body 31 is formed with a first bending portion, and the first bending portion is connected with the bottom wall 11, and the second side adjacent to the first side of the main body 31 is connected with the side wall 12, and the third side edge and the fourth side edge adjacent to the main body 31 are left unconnected. The main body 31, the support 20, the first bending portion, the side wall 12, and the bottom wall 11 enclose the cavity 41. That is, the cavity 41 is arranged in the corner area of the bottom wall 11 close to the side wall 12. One side edge of the main body 31 forms a bending portion connected with the bottom wall 11, forming a half-cavity structure of one side of the conductive layer cooperating with two sides of the shell.

[0091] In combination with Figure 1 and Figure 7 It is shown that, in some optional embodiments, the support 20 is provided with a notch portion 21 corresponding to the adjacent positions of the two openings, and the conductive layer 30 is provided with a second conductive connecting piece 34 corresponding to the notch portion 21. It can be understood that the edge of the main body 31 without the bending portion 32, that is, the second conductive connecting piece 34 is arranged on the edge of the main body 31 corresponding to the two openings, and the second conductive connecting piece 34 can serve as a feed point of the antenna. Alternatively, the size of the notch portion 21 can be 3*5mm, and the second conductive connecting piece 34 can be a metal spring. Further, the second conductive connecting piece 34 can be connected with the metal shell 10, which serves as a support for the conductive layer 30 while serving as a feed point of the antenna, thereby increasing the stability of the conductive layer 30.

[0092] In combination with Figure 7 and Figure 8As shown, in some optional embodiments, the bracket 20 has at least one connection hole 22 along its circumference. The antenna also includes a fastener (not shown) that passes through the connection hole 22 and connects to the metal housing 10, thereby fixing the bracket 20 to the metal housing 10 and ensuring the stability of the electrical connection between the conductive layer 30 and the metal housing 10. Optionally, the connection hole 22 is positioned approximately 1 mm away from the conductive layer 30. The connection hole 22 can be a screw hole, and the fastener can be a screw. The figure shows four connection holes 22 as an example.

[0093] Combination Figure 1 and Figure 8 As shown, Figure 8 Region 100 is the antenna region. In some optional embodiments, a third conductive connector 36 is provided on the side of the conductive layer 30 away from the metal housing 10. The third conductive connector 36 is provided corresponding to the two openings. Optionally, the third conductive connector 36 can be provided on the same side as the second conductive connector 34, and the distance from the edge and the second conductive connector 34 is within 3mm, thereby being close to the feed point and achieving a shorter conductive path.

[0094] When the antenna is used in electronic devices with a display screen, the third conductive connector 36 can be used to connect to the display screen and serve as a grounding element, thereby reducing clutter, minimizing interference to the display screen, and improving antenna efficiency. Optionally, the third conductive connector 36 and the second conductive connector 34 are arranged overlapping along the thickness direction of the conductive layer 30, so that the grounding point is located close to the feed point, forming the shortest conductive path. The third conductive connector 36 can be conductive foam, conductive silicone, conductive cloth, etc., pasted on the conductive layer 30. The number of third conductive connectors 36 can be one or more, arranged according to antenna performance requirements.

[0095] In some optional embodiments, the antenna of this disclosure can achieve different frequencies by adjusting the size of the main body of the support and conductive layer. Specifically, as the size of the main body of the support and conductive layer decreases, the resonant frequency changes from low to high. Taking a rectangular main body of the support and conductive layer as an example, adjusting the size of the main body of the support and conductive layer mainly refers to adjusting the length of the main body of the support and conductive layer, and secondly, adjusting the width of the main body of the support and conductive layer. In this way, the resonant frequency of the antenna can be achieved from 0.5 GHz to 10 GHz.

[0096] See Figure 9 and Figure 10 The figure shows the radiation efficiency and passive efficiency of the antenna disclosed in this invention obtained through simulation. The measured low-frequency performance is approximately -7dB. Figure 9 (As shown in the middle circle), the performance is satisfactory. See also... Figure 5 and Figure 11 As shown,Figure 11 The current distribution diagram of the antenna of the present disclosure is shown. It can be seen that the antenna of the present disclosure adopts the technical solution described above, the edge current on both sides of the opening A and the opening B is the main mode, and the low-frequency current is formed along the surface of the cavity to the feeding point by the sealing edge C and the sealing edge D, which together form the low-frequency current mode.

[0097] As shown in Table 1, the antenna scheme using the embodiment of the present disclosure has a low specific absorption rate (SAR) value, and the SAR measured pad scene can reach the regulation without SAR drop, so that the antenna transmission power does not need to be reduced, and the user signal experience is greatly improved.

[0098]

[0099] Table 1

[0100] Referring again to Figure 1 As shown, the embodiment of the present disclosure also provides an electronic device, which can be, for example, a mobile phone, a tablet computer, a notebook computer, a wearable device, a smart bracelet, a smart watch, smart glasses, and the like. The electronic device includes a display screen 90 and an antenna. The display screen 90 is disposed on the first conductive member and connected to the second conductive member. It should be noted that the antenna described in the above embodiments and implementation manners is also applicable to the electronic device of the present embodiment. It can be understood that, taking the first conductive member as a metal shell and the second conductive member as a conductive support as an example, the display screen 90 is disposed on the metal shell 10 and connected to the conductive support 23 of the antenna. Optionally, the display screen 90 can be connected to the conductive layer 30 of the conductive support 23. The display screen 90 and the conductive layer 30 can be connected through the third conductive connecting member 36. The third conductive connecting member 36 serves as a grounding function, thereby reducing spurs, reducing interference to the display screen, and improving the efficiency of the antenna.

[0101] As can be seen from the above embodiments, the electronic device of the present disclosure adopts the above antenna. A cavity with two adjacent openings is formed by the conductive support and the metal shell. The feeding point of the antenna is located at the adjacent position of the two openings, thereby constituting a half-cavity antenna (which can be understood as a half-cavity mode healthy antenna). Compared with the cavity antenna with only one opening in the related art, the same low-frequency use case can be met, and the size and occupied use volume of the antenna can be reduced, and the cost and mass production risk can be reduced.

[0102] Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the features disclosed herein. It is intended that the disclosure be construed as including any patents, patent applications, publications, publications, or other disclosure of the prior art that are referred to by their title or by a general identification of their content. It is intended that the disclosure encompass variations and modifications of the specific structure disclosed herein to the extent that these variations and modifications remain consistent with the general principles of the present disclosure. The specification and examples are to be regarded as exemplary in nature and not as restrictive.

[0103] It should be understood that the present disclosure is not limited to the precise structures herein described and illustrated in the drawings and that various modifications and changes can be made therein without departing from the scope thereof. The scope of the present disclosure is indicated by the appended claims.

Claims

1. An antenna, characterized by The antenna comprises: a first conductive part and a second conductive part connected with the first conductive part, the first conductive part and the second conductive part enclosing a cavity, the cavity comprising two adjacent openings; the first conductive part is one of a metal shell, a conductive support, a circuit board and a conductive cover, and the second conductive part is another one of the metal shell, the conductive support, the circuit board and the conductive cover; a feeding point of the antenna is located at the adjacent position of the two openings; wherein the second conductive part comprises a main body part and a bending part, the main body part leaving two adjacent side edges, and the bending part being formed at other edges of the main body part and being bent towards the first conductive part, and the bending part being connected with the first conductive part; the main body part, the bending part and the first conductive part enclosing the cavity, and the two adjacent side edges left by the main body part and the first conductive part forming the two openings.

2. The antenna according to claim 1, characterized in that, Further comprising a tuning circuit board arranged at the adjacent position of the two openings, the tuning circuit board being provided with a connecting line for connecting an external device.

3. The antenna of claim 2, wherein, The tuning circuit board is provided with a matching circuit, and the matching circuit comprises a capacitor and an inductor.

4. The antenna of claim 1, wherein, The first conductive part is provided with a functional device, and the second conductive part is provided with a hollow part corresponding to the position of the functional device.

5. The antenna according to claim 4, characterized in that, The first conductive part is provided with a receiving cavity corresponding to the position of the functional device, and the functional device is embedded in the receiving cavity.

6. The antenna according to claim 5, characterized in that, The surface of the functional device is located in the receiving cavity; or the surface of the functional device is flush with the surface of the first conductive part.

7. The antenna according to claim 5, wherein, The area of the hollow part is greater than the area of the receiving cavity, and the projection of the hollow part on the first conductive part covers the receiving cavity.

8. The antenna according to claim 7, characterized in that, The interval distance between the projection of the hollow part on the first conductive part and the outer edge of the receiving cavity is not less than 2mm.

9. The antenna according to claim 4, wherein, The functional device is provided with a flexible circuit board, and the flexible circuit board is provided with at least one magnetic bead.

10. The antenna according to claim 9, characterized in that, The flexible circuit board is arranged on the side of the functional device opposite to the second conductive part.

11. The antenna according to claim 4, wherein, The functional device comprises a loudspeaker or a battery; and / or The number of the functional devices is one or more, and the number of the hollow parts corresponds to the number of the functional devices.

12. The antenna according to claim 1, wherein, The first conductive part is a metal shell, and the second conductive part is a conductive support; the conductive support comprises a support and a conductive layer wrapped around the support; the conductive layer is connected with the metal shell, and the support, the conductive layer and the metal shell enclose the cavity.

13. The antenna according to claim 12, characterized in that, The support is provided with a notch part corresponding to the adjacent position of the two openings, and the conductive layer is provided with a second conductive connecting part corresponding to the notch part; and / or The support is provided with at least one connecting hole in the circumferential direction, and the antenna further comprises a fastener, the fastener being arranged in the connecting hole and being connected with the metal shell; and / or The side of the conductive layer opposite to the metal shell is provided with a third conductive connecting part; and / or The support comprises a plastic support.

14. The antenna according to claim 1, wherein, The bending portion comprises a first bending segment and a second bending segment, the first bending segment bends from the main body portion in a first direction, and the second bending segment bends from the first bending segment in a second direction, and the second bending segment is connected with the first conductive member.

15. The antenna according to claim 14, characterized in that, The second bending segment is provided with a plurality of first conductive connecting members at intervals in the length direction, and the first conductive connecting members are connected with the first conductive member.

16. The antenna according to claim 1, wherein, The bending portion surrounds the other edges of the main body portion except for the two side edges corresponding to the two openings; and the bending portion is provided with a plurality of first conductive connecting members at intervals in the length direction, and the first conductive connecting members are connected with the first conductive member.

17. The antenna according to claim 1, wherein, The main body portion comprises a first surface and a second surface opposite to the first surface, and the first surface is arranged to face away from the first conductive member compared with the second surface; and the bending portion extends from one side of the first surface to one side of the second surface and at least partially protrudes from the second surface.

18. The antenna according to claim 1, wherein, The main body portion is rectangular, and two adjacent side edges of the main body portion are left empty, and the other two adjacent side edges of the main body portion are sequentially formed with a first bending portion and a second bending portion, and the first bending portion and the second bending portion are both connected with the first conductive member; or The first conductive member comprises a bottom wall and a side wall connected with the bottom wall, and the main body portion is rectangular, and a first side edge of the main body portion is formed with a first bending portion, and the first bending portion is connected with the bottom wall, and a second side adjacent to the first side of the main body portion is connected with the side wall, and a third side edge and a fourth side edge adjacent to each other of the main body portion are left empty; and the main body portion, the first bending portion, the side wall and the bottom wall enclose the cavity.

19. The antenna according to claim 1, wherein, The second conductive member is provided with a notch portion corresponding to the abutment of the two openings, and the notch portion is provided with a second conductive connecting member; and / or The second conductive member is provided with at least one connecting hole in the circumferential direction, and the antenna further comprises a fastener, and the fastener is arranged through the connecting hole and connected with the first conductive member; and / or The side of the second conductive member facing away from the first conductive member is provided with a third conductive connecting member.

20. The antenna according to claim 1, wherein, The two openings adjacent to each other comprise a first opening and a second opening; At least part of the first opening is closed; or At least part of the second opening is closed; or At least part of the first opening is closed, and at least part of the second opening is closed.

21. The antenna according to claim 1, wherein, A matching circuit is further included and arranged at any of the openings, and the matching circuit comprises a tuning switch.

22. An electronic device, comprising: A display screen and an antenna as claimed in any of claims 1-21 are included, and the display screen is arranged on the first conductive member and connected with the second conductive member.

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