Antenna structure and electronic equipment

Abstract

The embodiment of the utility model provides an antenna structure and electronic equipment, the antenna structure comprises a metal shell, a conductive box body and a frequency reduction assembly, the conductive box body is connected with the metal shell, and a cavity with an opening is enclosed to form a cavity antenna. The frequency reduction assembly is arranged in the cavity, an assembling gap is formed between the frequency reduction assembly and the inner wall of the conductive box body, and the dielectric constant of the frequency reduction assembly is larger than that of gas in the cavity. According to the antenna structure provided by the embodiment of the invention, the dielectric constant of the frequency reduction assembly is greater than the dielectric constant of the gas in the cavity, so that the propagation speed of electromagnetic waves in the cavity can be reduced, and the wavelength is shortened. When the wavelength becomes short due to the increase of the dielectric constant, in order to maintain the formation of the standing wave, the resonant frequency is reduced to adapt to a new wavelength, so that the center frequency point of the electromagnetic wave generated by the antenna shifts to a low frequency, and the low-frequency performance of the antenna is improved.

Description

Technical Field

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

[0002] With the continuous development of communication technology, electronic devices such as mobile phones and tablets have evolved from carrying simple functions to supporting rich media such as voice, data, music, and video. At the same time, they can expand and install a variety of application apps to meet people's various needs.

[0003] At the same time, manufacturing processes are constantly improving, and consumers are increasingly concerned about the appearance and size of electronic devices. This has led to the continuous development of electronic devices towards miniaturization, intelligence, lightness, and narrow bezels. This trend towards miniaturization of electronic devices has affected the space available for antenna installation within these devices, which in turn has affected the antenna's low-frequency performance. Utility Model Content

[0004] The present disclosure provides an antenna and an electronic device to address the deficiencies in the related art.

[0005] In a first aspect, an embodiment of the present disclosure provides an antenna, comprising: a metal shell, a conductive box body, and a frequency reduction component, wherein the conductive box body is connected to the metal shell and encloses a cavity with an opening to form a cavity antenna.

[0006] The frequency reduction component is arranged in the cavity and has an assembly gap with the inner wall of the conductive box body. The dielectric constant of the frequency reduction component is greater than the dielectric constant of the gas in the cavity.

[0007] Preferably, the frequency reduction component includes a frequency reduction component and a support component, one end of the support component is connected to the frequency reduction component, and the other end is connected to the metal shell, and there is an assembly gap between the frequency reduction component and the inner wall of the conductive box body.

[0008] Preferably, the projection area of the frequency reduction component on the conductive box body is larger than the projection area of the support component on the conductive box body.

[0009] Preferably, the conductive box body includes a shielding cover, which is connected to the metal shell through a circuit board and is connected to a side of the circuit board away from the metal shell; the shielding cover and the metal shell enclose the cavity; and the assembly gap is provided between the frequency reduction component and the inner wall of the shielding cover; or

[0010] The conductive box body includes a bracket and a conductive layer, the conductive layer is arranged on the side of the bracket away from the metal shell and is connected to the metal shell; the conductive layer, the bracket and the metal shell together form the cavity; there is an assembly gap between the frequency reduction component and the inner wall of the conductive layer.

[0011] Preferably, the conductive box body includes the shielding cover, the circuit board has a hollow area, the shielding cover is connected to the circuit board corresponding to the hollow area, the cavity is formed corresponding to the hollow area, and the frequency reduction component is arranged corresponding to the hollow area.

[0012] Preferably, the frequency reduction component includes a frequency reduction component and a support component, one end of the support component is connected to the frequency reduction component, and the other end passes through the hollow area and is connected to the metal shell; there is an assembly gap between the frequency reduction component and the inner wall of the shielding cover.

[0013] Preferably, the shielding cover includes a main body and a bent portion, wherein the bent portion is formed on at least a portion of an edge of the main body and is bent toward the metal shell, and the bent portion is connected to the circuit board;

[0014] The main body, the bent portion, and the metal shell together form the cavity, and the opening is formed between the edge of the main body that does not form the bent portion and the metal shell;

[0015] An assembly gap is defined between the frequency reduction component and the inner wall of the main body.

[0016] Preferably, the frequency reduction component further comprises a buffer layer, which is provided on a surface of the frequency reduction component facing the inner wall of the shielding cover, and the buffer layer is provided in contact with the inner wall of the shielding cover; or

[0017] The frequency reduction component further includes an adhesive layer disposed between the frequency reduction component and the inner wall of the shielding cover.

[0018] Preferably, the conductive box body includes a shielding cover, and an elastic conductive member is provided between the shielding cover and the metal shell.

[0019] Preferably, the frequency reduction component and the support component are both one, the support component and the frequency reduction component are integrally formed, and the support component is formed at the center of the frequency reduction component; or

[0020] There is one frequency reduction component and a plurality of support components. The plurality of support components and the frequency reduction component are integrally formed. The plurality of support components are formed at intervals at edge positions of the frequency reduction component along a circumference of the frequency reduction component.

[0021] Preferably, the assembly gap is 0, and the frequency reduction component is arranged in contact with the inner wall of the conductive box body; or

[0022] The assembly gap is set to be greater than 0 and less than or equal to 0.2 mm according to the assembly tolerance of the frequency reduction component and the conductive box body.

[0023] Preferably, the antenna structure further comprises a buffer layer, which is provided on a surface of the frequency reduction component facing the inner wall of the conductive box body, and the buffer layer is provided in contact with the inner wall of the conductive box body; or

[0024] The antenna structure further includes an adhesive layer disposed between the frequency reduction component and the inner wall of the conductive box body.

[0025] Preferably, the number of the frequency reduction component is one, and the frequency reduction component is located in the middle of the cavity; or

[0026] There are multiple frequency reduction components, and the multiple frequency reduction components are distributed at intervals in the middle of the cavity.

[0027] In a second aspect, an embodiment of the present disclosure provides an electronic device, comprising the antenna structure as described in the first aspect.

[0028] The technical solutions provided by the embodiments of the present disclosure may have the following beneficial effects:

[0029] It can be seen from the above embodiments that the antenna structure of the present invention includes a metal shell, a conductive box body and a frequency reduction component, and a cavity with an opening is formed by enclosing the conductive box body and the metal shell to form a cavity antenna with an opening. The electromagnetic wave is reflected between the inner walls of the cavity and forms a standing wave, and the resonant frequency is one or more of these standing wave frequencies. By arranging the frequency reduction component in the cavity, and providing an assembly gap between the frequency reduction component and the inner wall of the conductive box body. The dielectric constant of the frequency reduction component is greater than the dielectric constant of the gas in the cavity, the propagation speed of the electromagnetic wave in the cavity can be reduced. Since the wavelength is inversely proportional to the propagation speed, the wavelength becomes shorter. When the dielectric constant increases and the wavelength becomes shorter, in order to maintain the formation of the standing wave, the resonant frequency is reduced to adapt to the new wavelength, thereby causing the center frequency of the electromagnetic wave generated by the antenna to shift to a low frequency, thereby improving the low-frequency performance of the antenna.

[0030] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0032] Figure 1 is a partial cross-sectional schematic diagram of an antenna structure according to an exemplary embodiment;

[0033] Figure 2 for Figure 1 A three-dimensional schematic diagram of an embodiment of a frequency reduction component in the antenna structure shown;

[0034] Figure 3 for Figure 1 A three-dimensional schematic diagram of another embodiment of a frequency reduction component in the antenna structure shown;

[0035] Figure 4 It is a front schematic diagram of an antenna according to an exemplary embodiment.

[0036] Reference numerals:

[0037] Antenna structure 1, metal shell 10, frequency reduction component 20, frequency reduction component 21, support component 22, buffer layer 23, adhesive layer 24, conductive box body 30, circuit board 31, shielding cover 32, elastic conductive component 33, hollow area 311, main body 321, bending part 322, opening 40, cavity 41. DETAILED DESCRIPTION

[0038] Here, the technical solutions in the embodiments (or "implementations") of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0039] If there are terms related to directional indications or positional relationships in the embodiments of the present disclosure (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships, movement, etc. between the components under a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first" and "second" in the embodiments of the present disclosure are only used for the purpose of convenience of description and should not be understood as indicating or implying relative importance.

[0040] See also Figure 1-3 As shown, Figure 1 is a partial cross-sectional schematic diagram of an antenna structure 1 according to an exemplary embodiment; Figure 2 for Figure 1 A three-dimensional schematic diagram of an embodiment of the frequency reduction component 20 in the antenna structure 1 is shown; Figure 3 for Figure 1 A three-dimensional schematic diagram of another embodiment of the frequency reduction component 20 in the antenna structure 1 is shown.

[0041] The embodiments of the present disclosure provide an antenna that can be applied to electronic products such as mobile phones, tablet computers, laptops, smart glasses, smart watches, smart bracelets, and wearable devices.

[0042] The antenna structure 1 provided in the embodiment of the present disclosure includes a metal shell 10, a conductive box body 30 and a frequency reduction component 20. The conductive box body 30 is connected to the metal shell 10 and encloses a cavity 41 with an opening 40 to form a cavity 41 antenna.

[0043] The frequency reduction component 20 is disposed in the cavity 41 and has an assembly gap with the inner wall of the conductive box 30 . The dielectric constant of the frequency reduction component 20 is greater than the dielectric constant of the gas in the cavity 41 .

[0044] It can be seen from the above embodiments that the antenna structure 1 of the present invention forms a cavity 41 with an opening 40 by enclosing a conductive box body 30 and a metal shell 10, forming a cavity 41 antenna with an opening 40. Electromagnetic waves are reflected between the inner walls of the cavity 41 and form standing waves, and the resonant frequency is one or more of these standing wave frequencies. By arranging the frequency reduction component 20 in the cavity 41, and having an assembly gap between the frequency reduction component 20 and the inner wall of the conductive box body 30. The dielectric constant of the frequency reduction component 20 is greater than the dielectric constant of the gas in the cavity 41, the propagation speed of the electromagnetic wave in the cavity 41 can be reduced. Since the wavelength is inversely proportional to the propagation speed, the wavelength becomes shorter. When the dielectric constant increases and the wavelength becomes shorter, in order to maintain the formation of standing waves, the resonant frequency is reduced to adapt to the new wavelength, thereby causing the center frequency of the electromagnetic wave generated by the antenna to shift to a low frequency, thereby improving the low-frequency performance of the antenna.

[0045] In some preferred embodiments, the metal housing 10 may include a bottom wall and side walls connected to the bottom wall, and the conductive box body 30 may be connected to the bottom wall. The bottom wall and the side walls may be integrally formed to form a unibody metal rear shell.

[0046] In some embodiments, the assembly gap is zero, and the frequency reduction component 20 is disposed in close contact with the inner wall of the conductive box 30. The frequency reduction component 20 is disposed in close contact with the inner wall of the conductive box 30, and the frequency reduction component 20 and the conductive box 30 are in close contact, which facilitates the radiation of electromagnetic waves from the conductive box 30 to the frequency reduction component 20. The frequency reduction component 20 reduces the propagation speed of the electromagnetic waves in the cavity 41, thereby reducing the frequency of the resonant wave.

[0047] In other embodiments, the assembly gap is set to be greater than 0 and less than or equal to 0.2 mm according to the assembly tolerance of the frequency reduction component 20 and the conductive box body 30. It is understandable that the closer the frequency reduction component 20 is to the inner wall of the conductive box body 30, the better the frequency reduction effect. However, in the actual production and assembly process, because the frequency reduction component 20 and the conductive box body 30 are both rigid objects, there is a certain degree of processing difficulty in tightly fitting the two rigid objects through assembly. If the frequency reduction component 20 and the conductive box body 30 are too tightly fitted, causing the frequency reduction component 20 to abut the conductive box body 30, the frequency reduction component 20 and the conductive box body 30 will be deformed, changing the current path in the cavity 41 and affecting the performance of the antenna. The assembly gap is set to be greater than 0 and less than or equal to 0.2 mm according to the assembly tolerance of the frequency reduction component 20 and the conductive box body 30, which can achieve a balance between assembly stability and frequency reduction effect.

[0048] exist Figure 1-2 In the embodiment shown, the frequency reduction assembly 20 includes a frequency reduction component 21 and a support component 22. One end of the support component 22 is connected to the frequency reduction component 21, and the other end is connected to the metal housing 10. An assembly gap is provided between the frequency reduction component 21 and the inner wall of the conductive box 30.

[0049] The frequency reduction assembly 20 includes a frequency reduction component 21 and a support member 22, with the frequency reduction component 21 positioned near the inner wall of the conductive housing 30 to reduce the resonant frequency. One end of the support member 22 is connected to the frequency reduction component 21, and the other end is connected to the metal housing 10. This allows the metal housing 10 to serve as a fixed point, supporting the frequency reduction component 21 near the conductive housing 30.

[0050] The frequency-reduction component 21 is supported and positioned near the conductive housing 30 by the support member 22. This not only facilitates placement of the frequency-reduction component 21 near the inner wall of the conductive housing 30, but also makes the frequency-reduction component 21 and the conductive housing 30 independent of each other, without a fixed connection between the frequency-reduction component 21 and the conductive housing 30. This significantly reduces the transmission of external force when applied. This prevents damage caused by asynchrony in deformation between the conductive housing 30 and the frequency-reduction component 21, which could occur due to the different materials and deformation of the conductive housing 30 and the frequency-reduction component 21.

[0051] exist Figure 1-Figure 2 In the illustrated embodiment, the projection area of the frequency reduction component 21 on the conductive box body 30 is larger than the projection area of the support component 22 on the conductive box body 30 , that is, the cross-section of the frequency reduction component 20 is a T-shaped structure.

[0052] The frequency-reduction element 21 is a thin sheet with large upper and lower surfaces. This reduces weight while increasing the area corresponding to the conductive box 30, thereby improving frequency-reduction performance. The support element 22 is a columnar element, which not only reduces the weight of the antenna but also reduces the amount of dielectric material within the cavity 41, thereby preventing the performance of the cavity 41 from being affected by excessive dielectric material.

[0053] To improve the structural stability of the frequency reduction component 20, in some embodiments, the interior of the support member 22 and the frequency reduction component 21 are made of metal or a material with good support properties, and the dielectric constant of the outer material of the support member 22 and the frequency reduction component 21 is greater than the dielectric constant of the air in the cavity 41. In some embodiments, the frequency reduction component 20 is manufactured using an iron-plastic process. In some embodiments, the support member 22 and the frequency reduction component 21 are integrally formed, which can further improve the structural stability of the frequency reduction component 20.

[0054] exist Figure 1 In the illustrated embodiment, the antenna structure 1 is a shielding cover 32-type antenna structure 1. The conductive box 30 includes a shielding cover 32, which is connected to the metal housing 10 via a circuit board 31. The shielding cover 32 is connected to the side of the circuit board 31 facing away from the metal housing 10. The shielding cover 32 and the metal housing 10 enclose a cavity 41. An assembly gap is provided between the frequency reduction component 20 and the inner wall of the shielding cover 32.

[0055] The shielding cover 32 and the metal shell 10 enclose a cavity 41 to form a cavity 41. This can reduce the risk of uncertain electrical connections and maintain the sealing of the cavity 41 intact, thereby increasing the performance of the entire antenna cavity 41, improving antenna performance, and reducing costs and mass production risks.

[0056] Optionally, the circuit board 31 can be a printed circuit board (PCB), and the shielding cover 32 can be made of a metal material that is both conductive and strong, such as copper, aluminum, or steel. Alternatively, the circuit board 31 and the metal housing 10 can be directly soldered using SMT soldering, or connected via a spring clip or conductive foam. The shielding cover 32 and the circuit board 31 can also be directly soldered using SMT soldering, or connected via a spring clip or conductive foam.

[0057] exist Figure 1In the illustrated embodiment, an elastic conductive member 33 is provided between the shielding cover 32 and the metal housing 10. The elastic conductive member 33 is a conductive spring. The provision of the elastic conductive member 33 not only electrically connects the shielding cover 32 and the metal housing 10, but also allows the shielding cover 32 and the metal housing 10 to have a certain range of motion in the connection direction between the shielding cover 32 and the metal housing 10. This facilitates the tightest possible fit between the upper surface of the frequency reduction component 20 and the inner wall of the shielding cover 32, thereby improving the frequency reduction effect. This also prevents the upper surface of the frequency reduction component 20 from abutting against the inner wall of the shielding cover 32 during assembly of the frequency reduction component 20, thereby preventing deformation between the frequency reduction component 20 and the shielding cover 32.

[0058] In some other embodiments, the antenna structure 1 is a flexible printed circuit board 31-type antenna structure 1. The conductive box 30 includes a bracket and a conductive layer. The conductive layer is disposed on a side of the bracket away from the metal housing 10 and is connected to the metal housing 10. The conductive layer, bracket, and metal housing 10 together form a cavity 41. An assembly gap is provided between the frequency reduction component 20 and the inner wall of the conductive layer.

[0059] The bracket is a frame-type bracket with a hollow area in the middle. The frequency reduction component 20 is arranged through the hollow area close to the inner wall of the conductive layer, so that there is an assembly gap between the frequency reduction component 20 and the inner wall of the conductive layer.

[0060] Optionally, the bracket may include a plastic bracket or a bracket made of other insulating materials to support the conductive layer and increase its stability. The conductive layer may be a flexible printed circuit (FPC) 31 or other conductive layer, such as an LDS (Laser-Direct-Structuring) laser forming process layer or a PDS (Printing Direct Structure) pad printing process layer.

[0061] Please continue to refer to Figure 1 ,exist Figure 1 In the illustrated embodiment, the antenna structure 1 is an antenna structure 1 with a shielding cover 32. The conductive housing 30 includes the shielding cover 32. The circuit board 31 has a hollowed-out area 311. The shielding cover 32 is connected to the circuit board 31 corresponding to the hollowed-out area 311. The cavity 41 is formed corresponding to the hollowed-out area 311, and the frequency reduction component 20 is disposed corresponding to the hollowed-out area 311.

[0062] The size of the hollow area 311 can be larger than the size of the shielding cover 32, and the position where the shielding cover 32 contacts the circuit board 31 can be bent outward. The degree of bending can be set according to actual needs as long as the connection strength between the two is met. The size of the hollow area 311 can also be smaller than the size of the shielding cover 32, and the shielding cover 32 is directly covered in the hollow area 311 and connected to the circuit board 31. The size of the hollow area 311 can also be the same as the size of the shielding cover 32, and the shielding cover 32 is directly covered in the hollow area 311 and connected to the circuit board 31. In this embodiment, the size of the hollow area 311 is larger than the size of the shielding cover 32. It can be understood that the presence of non-metallic medium inside the cavity 41 will have a certain impact on the performance of the antenna. Therefore, the part of the circuit board 31 corresponding to the shielding cover 32 can be dug out to remove the useless part of the plate body inside to form a hole hollow area 311, so that it becomes an air medium, a lossless medium, thereby improving the efficiency of the antenna.

[0063] Please also refer to Figure 1 and Figure 2 The frequency reduction assembly 20 includes a frequency reduction component 21 and a support member 22. One end of the support member 22 is connected to the frequency reduction component 21, and the other end passes through the hollow area 311 and is connected to the metal housing 10. An assembly gap is provided between the frequency reduction component 21 and the inner wall of the shielding cover 32. The assembly gap can be zero, or the assembly tolerance between the frequency reduction assembly 20 and the conductive box 30 can be set to be greater than 0 and less than or equal to 0.2 mm.

[0064] The frequency reduction assembly 20 includes a frequency reduction component 21 and a support member 22, with the frequency reduction component 21 positioned near the inner wall of the shielding case 32, thereby reducing the resonant frequency. One end of the support member 22 is connected to the frequency reduction component 21, and the other end is connected to the metal housing 10. This facilitates supporting the frequency reduction component 21 near the shielding case 32, using the metal housing 10 as a fixed point.

[0065] The support member 22 supports the downconverter 21 in a position close to the shielding cover 32. This not only facilitates the placement of the downconverter 21 near the inner wall of the shielding cover 32, but also makes the downconverter 21 and the shielding cover 32 independent of each other, without a fixed connection between them. This significantly reduces the transmission of external forces when applied. This prevents damage caused by asynchrony in deformation between the shielding cover 32 and the downconverter 21, which could occur due to different materials and deformations.

[0066] exist Figure 1In the illustrated embodiment, the shielding cover 32 includes a main body 321 and a bent portion 322. The bent portion 322 is formed along at least a portion of the edge of the main body 321 and bends toward the metal housing 10. The bent portion 322 is connected to the circuit board 31. The main body 321, the bent portion 322, and the metal housing 10 together form a cavity 41. An opening 40 is formed between the edge of the main body 321 where the bent portion 322 is not formed and the metal housing 10. An assembly gap is provided between the frequency-reducing component 21 and the inner wall of the main body 321.

[0067] It is understandable that the main body 321 has a larger area than the bent portion 322, and the main body 321 is flat relative to the bent portion 322, which facilitates the installation of the frequency reduction component 21. The direction between the main body 321 and the metal shell 10 is generally the thickness direction of the electronic device, and the spacing is relatively small. When there is an assembly gap between the frequency reduction component 21 and the inner wall of the main body 321, the top of the metal shell 10 is the main body 321. When the frequency reduction component 21 is set between the main body 321 and the metal shell 10, the support member 22 does not need to be bent, and the two ends of the support member 22 can be connected to the metal shell 10 and the frequency reduction component 21 respectively, which can save the length of the support member 22, play a role in reducing weight, and further reduce the medium inside the cavity 41, avoiding the performance of the cavity 41 antenna being affected by the large amount of medium inside the cavity 41.

[0068] exist Figure 2 In the illustrated embodiment, the antenna structure 1 further includes a buffer layer 23, disposed on the side surface of the frequency reduction component 20 facing the inner wall of the conductive box 30. The buffer layer 23 is positioned in contact with the inner wall of the conductive box 30. Made of a flexible material, the buffer layer 23 prevents surface damage caused by direct contact between the frequency reduction component 21 and the shielding cover 32, facilitating placement of the frequency reduction component 21 close to the inner surface of the shielding cover 32 and ensuring stable performance of the assembled antenna structure 1. The loss tangent of the buffer layer 23 is preferably relatively low. At a frequency of 1 GHz, the loss tangent of the buffer layer 23 is less than 0.02. The loss tangent is a physical quantity that describes the relationship between energy loss and energy storage in a material in electric and magnetic fields. The smaller the loss tangent value, the better the material's storage capacity and the lower the electrical energy loss.

[0069] It is understood that when the frequency reduction assembly 20 is positioned against the inner wall of the conductive housing 30, a buffer layer 23 must be provided between the frequency reduction assembly 20 and the conductive housing 30. When there is an assembly gap between the frequency reduction assembly 20 and the inner wall of the conductive housing 30, the buffer layer 23 may or may not be provided. When the buffer layer 23 is not provided, the assembly gap between the frequency reduction assembly 20 and the inner wall of the conductive housing 30 can provide a certain buffering effect.

[0070] In some embodiments, the frequency reduction assembly 20 includes not only a frequency reduction component 21 and a support member 22, but also a buffer layer 23. The buffer layer 23 is disposed on the side of the frequency reduction component 21 facing the inner wall of the shielding cover 32, and the buffer layer 23 is arranged in contact with the inner wall of the shielding cover 32. This prevents the frequency reduction component 21 from colliding with the shielding cover 32 due to the absence of flexible objects when the frequency reduction component 21 is supported by the support member 22 and is close to the inner wall of the shielding cover 32.

[0071] Please refer to Figure 3 ,exist Figure 3 In the illustrated embodiment, the antenna structure 1 further includes an adhesive layer 24 disposed between the frequency-reduction component 20 and the inner wall of the conductive housing 30. The adhesive layer 24 allows the frequency-reduction component 20 to be bonded to the inner wall of the conductive housing 30, ensuring that the frequency-reduction component 20 is positioned flush against the inner wall of the conductive housing 30. Furthermore, compared to supporting the frequency-reduction component 21 against the inner wall of the shielding cover 32 with a support member 22, the omission of the support member 22 not only reduces weight but also facilitates assembly, as the component only needs to be bonded to the inner wall of the conductive housing 30, eliminating the need to consider the distance between the metal housing 10 and the conductive housing 30.

[0072] The bonding of the frequency reduction component 20 and the inner wall of the conductive housing 30 by the adhesive layer 24 secures the frequency reduction component 20 to the inner wall of the conductive housing 30. To avoid the problem of relative position changes due to inconsistent deformation, which may cause the components to be non-parallel or damaged, the solution of using the adhesive layer 24 to secure the frequency reduction component 20 is preferably used in electronic devices where the frequency reduction component 20 and the conductive housing 30 are not susceptible to deformation. For example, it is used in electronic devices with relatively fixed positions or in electronic devices that are not susceptible to being dropped.

[0073] When the antenna structure 1 is an antenna with a shielding cover 32, the frequency reduction component 20 includes not only a frequency reduction surface but also an adhesive layer 24. The adhesive layer 24 is arranged between the frequency reduction component 21 and the inner wall of the shielding cover 32, and the frequency reduction component 21 can be pasted on the inner wall of the shielding cover 32.

[0074] It can be understood that when the antenna structure 1 is an antenna structure 1 with a flexible circuit board 31, the frequency reduction component 20 not only includes a frequency reduction surface but also an adhesive layer 24. The adhesive layer 24 is arranged between the frequency reduction component 21 and the inner wall of the conductive layer, and the frequency reduction component 21 can be adhered to the inner wall of the conductive layer.

[0075] In some embodiments, the projection of the frequency-reducing component 21 onto the shielding cover 32 is larger than the projection of the support member 22 onto the shielding cover 32. The frequency-reducing component 21 is a sheet-like object with a relatively thin thickness and large upper and lower surfaces. This increases the area corresponding to the conductive box 30 while reducing weight, thereby improving frequency-reducing performance. The support member 22 is a columnar object, which not only reduces the weight of the antenna but also reduces the amount of dielectric material within the cavity 41, thereby preventing the performance of the cavity 41 antenna from being affected by excessive dielectric material inside the cavity 41.

[0076] To improve the structural stability of the frequency reduction component 20, in some embodiments, the interior of the support member 22 and the frequency reduction component 21 are made of metal or a material with good support performance, and the dielectric constant of the outer material of the support member 22 and the frequency reduction component 21 is greater than the dielectric constant of the air in the cavity 41. In some embodiments, the frequency reduction component 20 is made using an iron-plastic process.

[0077] Please refer to Figure 4 , Figure 4 FIG. 1 is a front view of an antenna according to an exemplary embodiment, that is, a view facing the metal housing 10. Figure 4 In the illustrated embodiment, the frequency-down component 21 and the support component 22 are each a single piece. The support component 22 and the frequency-down component 21 are integrally formed, enhancing the structural stability of the frequency-down component 20. The support component 22 is formed at the center of the frequency-down component 21. This provides relatively balanced support for the frequency-down component 21, ensuring that the frequency-down component 21 remains flush with the metal housing or maintains an assembly gap between the frequency-down component 21 and the inner wall of the conductive housing 30. This prevents portions of the frequency-down component 21 from moving away from the conductive housing 30 after the antenna structure 1 is assembled.

[0078] In some embodiments, there is one frequency-reduction component 21 and multiple support components 22. The multiple support components 22 are integrally formed with the frequency-reduction component 21, and the multiple support components 22 are spaced apart along the circumference of the frequency-reduction component 21 at the edges of the frequency-reduction component 21. When the frequency-reduction component 21 is too large and a single support component 22 is insufficient to support the frequency-reduction component 21, multiple support components 22 may be provided. The multiple support components 22 support the frequency-reduction component 21 from its edges, preventing portions of the frequency-reduction component 21 from moving away from the conductive box 30.

[0079] exist Figure 4 In the illustrated embodiment, there is one frequency reduction component 20, which is located in the middle of the cavity 41. When the frequency reduction component 20 is positioned in the middle of the cavity 41, and when the frequency reduction component 20 is positioned in contact with the conductive box 30 and a buffer layer 23 is provided between the frequency reduction component 20 and the conductive box 30, the frequency reduction component 20 can support the conductive box 30.

[0080] In some embodiments, there are multiple frequency reduction components 20. Multiple frequency reduction components 20 can not only improve the frequency reduction effect, but also disperse the connection points between the frequency reduction components 20 and the conductive box body 30 or the metal shell 10, thereby avoiding that some areas of the conductive box body 30 or the metal shell 10 are subjected to greater force, thereby improving the stability of the cavity 41 antenna structure 1.

[0081] The support in the center of cavity 41 is weaker than that at the edges of cavity 41. Multiple frequency-reduction components 20 are spaced apart in the center of cavity 41. When frequency-reduction components 20 are placed in contact with conductive box 30 and a buffer layer 23 is provided between them, frequency-reduction components 20 can support conductive box 30 in the center of cavity 41, preventing a lack of support in the center of conductive box 30 and improving the stability of antenna structure 1 in cavity 41. In practical applications, the number and size of frequency-reduction components 20 can be appropriately determined by taking into account the antenna's frequency reduction range and weight requirements.

[0082] The disclosed embodiments further provide an electronic device, which may be, for example, a mobile phone, tablet computer, laptop computer, wearable device, smart bracelet, smart watch, smart glasses, or other electronic product.

[0014]

[0015] An electronic device antenna structure 1. It should be noted that the antenna structure 1 described in the above embodiments and implementations is also applicable to the electronic device of this embodiment.

[0083] As can be seen from the above embodiments, the antenna structure 1 of the present disclosure can reduce the propagation speed of electromagnetic waves in the cavity 41 by arranging the frequency reduction component 20 in the cavity 41, and providing an assembly gap between the frequency reduction component 20 and the inner wall of the conductive box 30. The dielectric constant of the frequency reduction component 20 is greater than the dielectric constant of the gas in the cavity 41. Since the wavelength is inversely proportional to the propagation speed, the wavelength is shortened. When the dielectric constant increases and the wavelength shortens, in order to maintain the formation of standing waves, the resonant frequency is reduced to adapt to the new wavelength, thereby shifting the center frequency of the electromagnetic waves generated by the antenna to a lower frequency, thereby improving the low-frequency performance of the antenna.

[0084] In the disclosed antenna structure 1, when the dimensions of the cavity 41 are fixed, the frequency reduction component 20 can shift the center frequency of the electromagnetic waves generated by the antenna toward lower frequencies, thereby improving the antenna's low-frequency performance. When the frequencies of the electromagnetic waves remain the same, the frequency reduction component 20 can reduce the dimensions of the cavity 41, thereby miniaturizing electronic devices.

[0085] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this disclosure is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this disclosure shall be included in the scope of protection of this disclosure.

Claims

1. An antenna structure, characterized in that: include: A metal shell, a conductive box and a frequency reduction component, wherein the conductive box is connected to the metal shell and encloses a cavity with an opening to form a cavity antenna; The frequency reduction component is arranged in the cavity and has an assembly gap with the inner wall of the conductive box body. The dielectric constant of the frequency reduction component is greater than the dielectric constant of the gas in the cavity.

2. The antenna structure according to claim 1, wherein: The frequency reduction component includes a frequency reduction component and a support component. One end of the support component is connected to the frequency reduction component, and the other end is connected to the metal shell. There is an assembly gap between the frequency reduction component and the inner wall of the conductive box body.

3. The antenna structure according to claim 2, characterized in that: The projection surface of the frequency reduction component on the conductive box body is larger than the projection surface of the support component on the conductive box body.

4. The antenna structure according to claim 1, wherein: The conductive box body includes a shielding cover, which is connected to the metal shell through a circuit board and is connected to a side of the circuit board away from the metal shell; the shielding cover and the metal shell enclose the cavity; and the assembly gap is provided between the frequency reduction component and the inner wall of the shielding cover; or The conductive box body includes a bracket and a conductive layer, the conductive layer is arranged on the side of the bracket away from the metal shell and is connected to the metal shell; the conductive layer, the bracket and the metal shell together form the cavity; there is an assembly gap between the frequency reduction component and the inner wall of the conductive layer.

5. The antenna structure according to claim 4, characterized in that: The conductive box body includes the shielding cover, the circuit board has a hollow area, the shielding cover is connected to the circuit board corresponding to the hollow area, the cavity is formed corresponding to the hollow area, and the frequency reduction component is arranged corresponding to the hollow area.

6. The antenna structure according to claim 5, characterized in that: The frequency reduction component includes a frequency reduction component and a support component, one end of the support component is connected to the frequency reduction component, and the other end passes through the hollow area and is connected to the metal shell; there is an assembly gap between the frequency reduction component and the inner wall of the shielding cover.

7. The antenna structure according to claim 6, characterized in that: The shielding cover includes a main body and a bent portion, wherein the bent portion is formed at least partially at an edge of the main body and is bent toward the metal shell, and the bent portion is connected to the circuit board; The main body, the bent portion, and the metal shell together form the cavity, and the opening is formed between the edge of the main body that does not form the bent portion and the metal shell; An assembly gap is defined between the frequency reduction component and the inner wall of the main body.

8. The antenna structure according to claim 6, characterized in that: The frequency reduction component further includes a buffer layer, which is provided on a surface of the frequency reduction component facing the inner wall of the shielding cover, and the buffer layer is provided in contact with the inner wall of the shielding cover; or The frequency reduction component further includes an adhesive layer disposed between the frequency reduction component and the inner wall of the shielding cover.

9. The antenna structure according to claim 4, characterized in that: The conductive box body includes a shielding cover, and an elastic conductive member is provided between the shielding cover and the metal shell.

10. The antenna structure according to claim 2, characterized in that: The frequency reduction component and the support component are both one piece, the support component and the frequency reduction component are integrally formed, and the support component is formed at the center of the frequency reduction component; or There is one frequency reduction component and a plurality of support components. The plurality of support components and the frequency reduction component are integrally formed. The plurality of support components are formed at intervals at edge positions of the frequency reduction component along a circumference of the frequency reduction component.

11. The antenna structure according to claim 1, wherein: The assembly gap is 0, and the frequency reduction component is arranged in contact with the inner wall of the conductive box; or The assembly gap is set to be greater than 0 and less than or equal to 0.2 mm according to the assembly tolerance of the frequency reduction component and the conductive box body.

12. The antenna structure according to claim 1, wherein: The antenna structure further includes a buffer layer, which is provided on a surface of the frequency reduction component facing the inner wall of the conductive box body, and the buffer layer is provided in contact with the inner wall of the conductive box body; or The antenna structure further includes an adhesive layer disposed between the frequency reduction component and the inner wall of the conductive box body.

13. The antenna structure according to claim 1, wherein: The number of the frequency reduction component is one, and the frequency reduction component is located in the middle of the cavity; or There are multiple frequency reduction components, and the multiple frequency reduction components are distributed at intervals in the middle of the cavity.

14. An electronic device, characterized in that: The invention comprises the antenna structure according to any one of claims 1 to 13.

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