Antenna and electronic equipment

Abstract

The invention relates to an antenna and electronic equipment, and the antenna comprises a first conductive part and a second conductive part which are connected with each other, the second conductive part and the first conductive part are enclosed to form a cavity, and the cavity comprises two adjacent opening edges and two adjacent closed edges. The antenna further comprises a first feed port and a tuning point, the tuning point is provided with a sensing container piece and is arranged at the intersection point of the two opening edges, and the first feed port is arranged on one opening edge and is close to one side of the adjacent closed edge. When the antenna feeds at the first feed port, a first antenna mode and a second antenna mode are excited at the same time, and the frequency of the second antenna mode is larger than that of the first antenna mode. And tuning of low-frequency and intermediate-frequency working frequencies is flexibly realized. The antenna can cover more frequency bands, and the problem that a conventional cavity antenna is single in frequency band and difficult to tune is solved. And the size and the occupied use volume of the antenna can be reduced, and the cost and the volume production risk are reduced.

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 Art

[0002] With the continuous development of communication technology, mobile phones and other electronic devices 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, production and manufacturing processes are constantly improving, and consumers are paying more and more attention to factors such as the appearance and cost of mobile phone products. Mobile phones are constantly developing towards miniaturization, intelligence, lightness, and narrow bezels.

[0004] Therefore, the design of the antenna is often affected by factors such as the mobile phone's appearance, structure, circuit board layout, and metal parts, making development increasingly difficult. Summary of the Invention

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

[0006] In a first aspect, an embodiment of the present disclosure provides an antenna, comprising: a first conductive component and a second conductive component connected to the first conductive component, wherein the second conductive component and the first conductive component enclose a cavity, the cavity comprising two adjacent open edges and two adjacent closed edges;

[0007] The antenna also includes a first feeding port and a tuning point. The tuning point is provided with an inductive component and is located at the intersection of the two open edges. The first feeding port is provided on one side of one of the open edges and close to the adjacent closed edge. When the antenna is fed at the first feeding port, a first antenna mode and a second antenna mode are simultaneously excited, and the frequency of the second antenna mode is greater than the frequency of the first antenna mode.

[0008] Optionally, the inductive device is provided with a matching circuit, and the matching circuit is connected to the first feeding port; the matching circuit includes a variable capacitor connected to the first feeding port, and the variable capacitor is grounded.

[0009] Optionally, the antenna further includes a second feeding port, which is provided at the intersection of the two opening edges; when the antenna is fed at the second feeding port, the first antenna mode is excited as a fundamental mode.

[0010] Optionally, the inductive device is provided with a matching circuit, and the matching circuit is connected to the first feeding port and the second feeding port;

[0011] The matching circuit includes a variable capacitor connected to the first feeding port, and the variable capacitor is grounded; the matching circuit also includes a distributed capacitor and a distributed inductor connected in series and in parallel, and connected to the second feeding port.

[0012] Optionally, the matching circuit includes a capacitor and an inductor connected in parallel and both connected to the second feeding port, and the capacitor is grounded.

[0013] Optionally, the cavity is rectangular, and the length ratio of the closed side to the open side is between 0.9:1 and 1:1.

[0014] Optionally, the distance between the first feeding port and the adjacent closed edge is no more than 4 mm.

[0015] Optionally, the first conductive component includes a metal shell, and the second conductive component includes a conductive bracket.

[0016] Optionally, the conductive bracket includes a bracket and a conductive layer wrapped around the bracket; the conductive layer is connected to the metal shell, and the bracket, the conductive layer and the metal shell enclose to form the cavity.

[0017] In a second aspect, an embodiment of the present disclosure provides an electronic device, comprising a metal shell, a display screen, and the antenna as described in the first aspect, wherein the first conductive component is part of the metal shell, and the two opening edges are both set toward the edge of the electronic device; the display screen is set in the metal shell and connected to the second conductive component.

[0018] Optionally, a camera module is further included, which is arranged at a corner of the back side of the metal shell, and the antenna is arranged at other corners of the metal shell avoiding the camera module.

[0019] The technical solutions provided by the embodiments of the present disclosure may have the following beneficial effects:

[0020] As can be seen from the above embodiments, the antenna disclosed herein forms a cavity with two adjacent openings by enclosing the second conductive component and the first conductive component. The first feeding port of the antenna is located adjacent to the two openings, thereby forming a semi-cavity antenna. Compared with the cavity antenna with only one opening in the related art, it can not only meet the same low-frequency usage conditions, but also reduce the size of the antenna and the occupied volume, thereby reducing costs and mass production risks. In addition, when the antenna is fed at the first feeding port, the first antenna mode and the second antenna mode are simultaneously excited, and the frequency of the second antenna mode is greater than the frequency of the first antenna mode. Flexible tuning of the low-frequency and medium-frequency operating frequencies is achieved. The antenna can cover more frequency bands, while solving the problem that the previous cavity antenna has a single frequency band and is difficult to tune.

[0021] 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

[0022] 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.

[0023] Figure 1 FIG2 is a schematic partial cross-sectional view of an electronic device according to an exemplary embodiment.

[0024] Figure 2 FIG. 1 is a schematic top view of an electronic device according to an exemplary embodiment.

[0025] Figure 3 is a partially enlarged schematic diagram of an antenna according to an exemplary embodiment.

[0026] Figure 4 This is the electric field distribution diagram of the TE101 antenna mode.

[0027] Figure 5 This is the electric field distribution diagram of the TE101 antenna mode.

[0028] Figure 6 is a schematic diagram of a matching circuit according to an exemplary embodiment.

[0029] Figure 7 FIG. 4 is a schematic back view of a bracket and a conductive layer according to an exemplary embodiment.

[0030] Figure 8 FIG. 1 is a front schematic diagram of a bracket and a conductive layer according to an exemplary embodiment.

[0031] Figure 9 and Figure 10 is a Smith sum efficiency diagram of the first feeding port according to an exemplary embodiment.

[0032] Figure 11 and Figure 12 is a Smith sum efficiency diagram of the second feeding port according to an exemplary embodiment.

[0033] Figure 13 is a schematic diagram of a matching circuit according to another exemplary embodiment.

[0034] Figure 14 This is S11 when the tuning port is open, according to an exemplary embodiment.

[0035] Figure 15 This is S11 during antenna tuning according to an exemplary embodiment.

[0036] Figure 16 Γ is the antenna tuning efficiency according to an exemplary embodiment.

[0037] Figure 17 is a schematic rear view of an electronic device according to an exemplary embodiment. DETAILED DESCRIPTION

[0038] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0039] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0040] As tablet computers evolve toward integrated metal structures, their five sides, excluding the screen, are almost entirely surrounded by metal, exponentially increasing the difficulty of tablet antenna design. To address this issue, some cavity resonant antennas have been applied to tablets. These structures typically have one open side and five closed sides. Specifically, the length of the cavity along the open side is often one wavelength of the resonant frequency, while the cavity width is often half a wavelength. In practical applications, a cavity antenna with a length of one wavelength requires a significant amount of space, significantly squeezing the living space of other components. Furthermore, due to the resonant structural characteristics of the cavity antenna, its bandwidth is too narrow and tuning is difficult.

[0041] To facilitate understanding of the technical solutions of the present disclosure, the antenna and electronic device of the present disclosure are described in detail below with reference to the accompanying drawings. The features of the following embodiments and implementations may be combined with each other unless they conflict.

[0042] See also Figures 1 to 3As shown, an embodiment of the present disclosure provides an antenna that can be used in electronic products such as mobile phones, tablets, laptops, smart glasses, smart watches, smart bracelets, and wearable devices. The antenna includes: a first conductive component 10 and a second conductive component 23 connected to the first conductive component 10. The second conductive component 23 and the first conductive component 10 enclose a cavity 41, and the cavity 41 includes two adjacent open edges (represented by A and B in the figure) and two adjacent closed edges (represented by C and D in the figure). The antenna also includes a first feeding port E1 and a tuning point F. The tuning point F is provided with an inductive component and is located at the intersection of the two open edges. That is, a tuning point is provided at the intersection of the two open edges of the antenna to connect the inductive component to achieve tuning. The first feeding port E1 is provided on one side of one of the open edges and close to the adjacent closed edge. When the antenna is fed at the first feeding port E1, the first antenna mode and the second antenna mode are simultaneously excited, and the frequency of the second antenna mode is greater than the frequency of the first antenna mode. Optionally, in this embodiment, the first antenna mode is TE101 mode, and the second antenna mode is TE103 higher-order mode. It should be noted that in other examples, the frequency of the required antenna mode can also be adjusted according to actual needs, and this disclosure does not limit this.

[0043] As can be seen from the above embodiments, the antenna disclosed herein forms a cavity with two adjacent openings by enclosing a second conductive component and a first conductive component. The antenna's first feed port is located adjacent to the two openings, thus forming a semi-cavity antenna (which can be understood as a semi-cavity healthy antenna). Compared to the cavity antenna with a single opening in the related art, this antenna can meet the same low-frequency requirements while reducing the antenna's size and occupied volume, thereby lowering costs and mass production risks. Furthermore, when the antenna is fed at the first feed port, it simultaneously excites the first and second antenna modes, with the second antenna mode having a higher frequency than the first. This allows for flexible tuning of low- and medium-frequency operating frequencies. This allows the antenna to cover a wider range of frequency bands while addressing the problem of conventional cavity antennas with a single opening having a single frequency band and difficulty in tuning. Alternatively, while the dimensions of the cavity antenna with a single opening in the related art are 155mm by 40mm, the technical solution disclosed herein can reduce the antenna's dimensions to 90mm by 40mm, reducing the antenna's volume by 42%.

[0044] In some optional embodiments, the antenna may further include a second feeding port E2, which is provided at the intersection of the two opening edges. When the antenna is fed at the second feeding port E2, the first antenna mode is excited as the fundamental mode.

[0045] See also Figure 4 and Figure 5As shown in the figure, eigenmode analysis shows that the antenna's fundamental mode, TE101, has only one strong electric field point at this location, but higher-order modes have many strong electric field points, and this location is not the strongest electric field point for these higher-order modes. Therefore, connecting an inductor at this location can effectively adjust the resonant frequency of the antenna's fundamental mode, but has little effect on the higher-order modes.

[0046] Furthermore, the inductive device is provided with a matching circuit, and the matching circuit is electrically connected to the first feeding port E1 and the second feeding port E2. Figure 6 As shown, the matching circuit includes a variable capacitor C1 connected to the first feeding port E1, and the variable capacitor C1 is grounded. The matching circuit also includes distributed capacitance and distributed inductance connected in series and in parallel, and connected to the second feeding port E2. In this embodiment, the matching circuit includes a capacitor C2 and an inductor L connected in parallel and both connected to the second feeding port E2, and the capacitor C2 is grounded. Optionally, the capacitance of the variable capacitor C1 is 0.1pF. The capacitance of the capacitor C2 is 0.5pF, and the inductance of the inductor L is 2.5nH. It should be noted that when different antenna modes need to be stimulated, the circuit form of the matching circuit and the values ​​of each capacitor and inductor can be adjusted according to actual conditions, and the present disclosure does not limit this.

[0047] It is understood that the sensing device can be set on a tuning circuit board, and the tuning circuit board can be provided with connecting wires for connecting external devices. The tuning circuit board can tune the semi-cavity phantom healthy antenna. When the antenna is used in electronic devices such as mobile phones, the tuning circuit board can be connected to the motherboard of the electronic device via the connecting wires to achieve a signal link between the antenna and the motherboard. Optionally, the tuning circuit board can be a printed circuit board (PCB), and the connecting wire can be a cable.

[0048] In some optional embodiments, the cavity 41 is rectangular, and the length ratio of the closed side to the open side is between 0.9:1 and 1:1. It can be understood that by observing the electric field distribution of the cavity resonant antenna in the related art, it can be seen that its electric field is a 1 wavelength mode in the long side direction and a half-wavelength mode in the short side direction. The electric field distribution of the entire cavity is half of the TE101 mode, that is, a half mode. Energy leaks and radiates from the opening along the long side of the cavity. But in fact, the cavity mode can still work in the case of a quarter mode, as long as its boundary conditions are set. In this way, the cavity volume can be reduced to half of the original, that is, the purpose of reducing the antenna volume is achieved.

[0049] Therefore, for the resonant cavity with double openings disclosed in the present invention, since the electric field distribution of the high-order mode of the antenna is different from that of the fundamental mode. In order to realize dual-mode operation, the present invention first performs eigenmode simulation on the antenna with double opening edges, and selects the two lowest-order modes TE101 and TE103 to realize the dual-band antenna. When the lengths of the two opening edges of the resonant cavity with double opening edges are similar, the frequency ratio of TE103 / TE101 is about 2.2. Since the frequency ratio of GPS and WIFI2.4G is 1.55, and the frequency ratio of WIFI5G and WIFI2.4G is 2.2, the length ratio of the closed edge to the open edge of the cavity 41 is controlled between 0.9:1 and 1:1, which can simultaneously realize dual-frequency high-efficiency GPS and WIFI2.4G antennas or WIFI5G and WIFI2.4G dual-band antennas, that is, the cavity with double openings is determined to be a rectangular resonant cavity with an aspect ratio of about 1.

[0050] In some optional embodiments, the distance between the first feeding port E1 and the adjacent closed edge C is no more than 4 mm. It is understandable that the present disclosure first analyzes the eigenmode field distribution of the double-opening resonant cavity, and selects the fundamental mode TE101 and the higher-order mode TE103 to realize a dual-frequency antenna. By utilizing the resonant characteristics that the fundamental mode has the strongest electric field at the critical point of the radiation edge of the double-opening edge and the higher-order mode has a weaker electric field distribution at this point, the dual frequency is achieved by utilizing the eigenmode and high-order mode of the cavity antenna. In order to achieve dual-frequency characteristics while having little impact on the resonant frequency of the cavity, the present disclosure chooses to set the first feeding port near the intersection of one of the open edges and the adjacent closed edge (the distance is no more than 4 mm), and then tunes it by connecting the inductive device at the tuning point. The tuning method of the present disclosure basically does not affect the operating frequency of the antenna in the high-frequency band, but flexibly realizes tuning of only the low-frequency and medium-frequency operating frequencies. This tuning method allows the antenna to cover more frequency bands, while solving the problem that the frequency band of the previous cavity antenna is single and difficult to tune.

[0051] In this way, the distance between the first feeding port E1 and the adjacent closed edge C is set to no more than 4 mm, and the feeding is selected at a location where the common electric field of the two modes is weaker. Feeding here will have little effect on the radiation aperture, will not destroy the current mode, and can effectively excite the TE101 and TE103 modes at the same time, while having little disturbance to the cavity resonant frequency.

[0052] Metal shell Metal shell Metal shell Metal shell Metal shell Metal shell In some optional embodiments, the first conductive component 10 includes a metal shell. It can be understood that when the antenna is applied to an electronic device, the first conductive component 10 can be understood as a part of the metal shell of the electronic device, and the second conductive component 23 includes a conductive bracket.

[0053] See also Figure 1 、 Figure 7 and Figure 8 As shown, Figure 7 3 is a schematic diagram of the back side of the bracket and the conductive layer according to an exemplary embodiment, that is, the side of the conductive layer facing the first conductive component. Figure 8 : is a front schematic diagram of a bracket and a conductive layer according to an exemplary embodiment, that is, the side of the conductive layer facing away from the first conductive component. In some optional embodiments, the second conductive component 23 may include a bracket 20 and a conductive layer 30 wrapped around the bracket 20, and the through hole 24 passes through the conductive layer 30 and the bracket 20. The conductive layer 30 is connected to the first conductive component 10, and the bracket 20, the conductive layer 30 and the first conductive component 10 enclose the cavity 41. The structural form of the conductive layer can increase the flexibility of antenna performance debugging in the research and development stage and shorten the proofing cycle. Optionally, the bracket 20 may 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 may include a flexible printed circuit (FPC) or other conductive layers, such as an LDS (Laser-Direct-structuring) laser forming process layer, a PDS (Printing Direct Structure) pad printing process layer, etc.

[0054] In some optional embodiments, the conductive layer 30 includes a main body 31 and a bending portion 32, the main body 31 is wrapped around the bracket 20, the main body 31 leaves adjacent edges on both sides empty, the bending portion 32 is formed on the other edges of the main body 31 and is bent toward the metal shell, and the bending portion 32 is connected to the metal shell. The main body 31, the bracket 20, the bending portion 32 and the metal shell enclose the cavity 41, and two openings are formed between the adjacent edges on both sides of the main body 31 and the metal shell. Optionally, the metal shell may include a bottom wall 11 and a side wall 12 connected to the bottom wall 11, and the conductive layer 30 is connected to 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 near the opening can be further bent to form a smaller bending portion to change and control the length and width of the opening, and the degree of bending can be set according to actual needs.

[0055] Optionally, the bracket 20 is rectangular, the main body 31 of the conductive layer 30 is rectangular, and the adjacent edges of the main body 31 are bent toward the metal shell to form a bent portion 32 and connected to the metal shell. In addition, openings are reserved on the adjacent edges to achieve the connection between the two sides of the conductive layer and the metal shell. The structural form of the reserved openings on both sides is a rectangular cavity 41, thereby improving the overall antenna cavity performance.

[0056] In some optional embodiments, the bending portion 32 includes a first bending section 321 and a second bending section 322. The first bending section 321 bends from the main body 31 along the first direction Y, and the second bending section 322 bends from the first bending section 321 along the second direction X. The second bending section 322 is connected to the metal shell. In this way, the connection between the conductive layer and the metal shell is achieved through the structural form of the bending portion. In addition, the design of the bending portion can increase the flexibility of debugging and shorten the proofing cycle. Optionally, the first direction Y is perpendicular to the second direction X, and the first direction Y is perpendicular to the second direction X. Figure 1 The direction shown in can be understood as the longitudinal direction, and the second direction X is Figure 1 The view shown in can be understood as being horizontal.

[0057] Furthermore, the second bend section 322 is provided with a plurality of first conductive connectors 33 spaced apart along the length direction. The first conductive connectors 33 are connected to the metal shell, that is, the first conductive connectors 33 are connected between the second bend section 322 and the metal shell, thereby achieving electrical connection between the conductive layer 30 and the metal shell. The main body 31, the bracket 20, the first bend section 321, the second bend section 322, the first conductive connectors 33, and the metal shell together form the cavity 41. In this way, the conductive layer is connected to the metal shell through the first conductive connectors, which can improve the sealing and reliability of the electrical connection. Optionally, the first conductive connector 33 can be a gold-plated conductive foam, conductive silicone, conductive cloth, etc. adhered to the second bend section 322 of the conductive layer 30. It can be understood that the conductive layer 30 and the metal shell are in contact and connected through the first conductive connectors 33, achieving electrical connection between the conductive layer 30 and the metal shell, forming a cavity 41 enclosed by the conductive layer 30, the first conductive connector 33, and the metal shell in a small space.

[0058] Optionally, the bent portion 32 surrounds the edges of the main body 31 except the edges on both sides corresponding to the two openings. The bent portion 32 is provided with multiple first conductive connectors 33 at intervals along the length direction. The first conductive connectors 33 are connected to the metal shell, thereby realizing electrical connection between the conductive layer 30 and the metal shell. The main body 31, the bracket 20, the bent portion 32, the first conductive connector 33 and the metal shell together form the cavity 41. The first conductive connector 33 can be one or more. When there are multiple first conductive connectors 33, the multiple first conductive connectors 33 can be arranged at intervals corresponding to the edges of the main body 31 of the conductive layer 30 except the edges corresponding to the two openings, thereby surrounding the cavity mode antenna to improve antenna performance. When there is one first conductive connector 33, the first conductive connector 33 surrounds the edges of the main body 31 of the conductive layer 30 except the edges corresponding to the two openings in a ring-shaped manner. For example, the bracket 20 is rectangular, and the main body 31 of the conductive layer 30 is rectangular. Three edges of the main body 31 are bent toward the metal shell to form a bent portion 32, which is connected to the metal shell. An opening is reserved on one edge of the other side, and the bent portion 32 surrounds the other two edges of the main body 31, excluding the edges corresponding to the two openings. A first conductive connector 33 is correspondingly connected in an annular shape between the bent portion 32 and the metal shell, thereby improving the sealing and reliability of the electrical connection.

[0059] In some optional embodiments, the bracket 20 includes a first surface and a second surface opposite the first surface, wherein the first surface is disposed away from the metal shell relative to the second surface. The main body 31 is wrapped around the first surface, and the bent 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 the side away from the metal shell, and the second surface is the side closer to the metal shell. The conductive layer 30 is wrapped around the side of the bracket 20 away from the metal shell. After the bent portion 32 bends from the main body 31, it wraps around the bracket 20 in the middle, thereby improving the stability of the bracket and the conductive layer.

[0060] In some optional embodiments, the metal shell includes a bottom wall 11 and a side wall 12 connected to the bottom wall 11, the electrical device 50 is disposed on the bottom wall 11, and the bottom wall 11 can be provided with the accommodation cavity. The cavity 41 formed by the conductive layer 30 and the metal shell can be disposed in an area of ​​the bottom wall 11 that is not close to the side wall 12, and the conductive layer 30 cooperates with the bottom wall 11 to form the cavity 41. The cavity 41 formed by the conductive layer 30 and the metal shell can also be disposed in a corner area of ​​the bottom wall 11 close to the side wall 12, and the conductive layer 30 cooperates with the bottom wall 11 and the side wall 12 to form the cavity 41. The following situations may be included:

[0061] (1) The main body 31 may be rectangular, with the adjacent two side edges of the main body 31 left empty, and the other adjacent two side edges of the main body 31 are sequentially formed with a first bend portion and a second bend portion, and the first bend portion and the second bend portion are both connected to the metal shell. The main body 31, the bracket 20, the first bend portion, the second bend portion and the metal shell together form the cavity 41. It can be understood that the first bend portion and the second bend portion are both connected to the bottom wall 11. The main body 31, the first bend portion, the second bend portion and the bottom wall 11 together form the cavity 41. That is, the cavity 41 is arranged in an area of ​​the bottom wall 11 that is not close to the side wall 12. The bend portions formed on the two edges of the main body 31 are connected to the bottom wall 11, forming a semi-cavity structure with two conductive layers and one shell.

[0062] (2) The main body 31 may be rectangular, with a first bend formed on the first side edge of the main body 31, the first bend being connected to the bottom wall 11, the main body 31 being connected to the second side adjacent to the first side and the side wall 12, and the main body 31 leaving the adjacent third and fourth side edges empty. The main body 31, the bracket 20, the first bend, the side wall 12, and the bottom wall 11 enclose the cavity 41. That is, the cavity 41 is provided in the corner area of ​​the bottom wall 11 near the side wall 12. A bend is formed on one edge of the main body 31 and connected to the bottom wall 11, forming a semi-cavity structure with a conductive layer on one side and a double-sided shell.

[0063] Combine Figure 1 and Figure 7 As shown, in some optional embodiments, the bracket 20 is provided with a notch portion 21 corresponding to the adjacent portion of the two openings, and the conductive layer 30 is provided with a second conductive connector 34 corresponding to the notch portion 21. It can be understood that the main body 31 does not form an edge of the bent portion 32, that is, the second conductive connector 34 is provided at the edge of the main body 31 corresponding to the two openings, and the second conductive connector 34 can be used to set the feeding port of the antenna. Optionally, the size of the notch portion 21 can be 3*5mm, and the second conductive connector 34 can be a metal spring. Furthermore, the second conductive connector 34 can be connected to the metal shell, and while serving as the antenna feeding port, it also serves as a support for the conductive layer 30, thereby increasing the stability of the conductive layer 30.

[0064] Combine Figure 7 and Figure 8As shown, in some optional embodiments, the bracket 20 is provided with at least one connection hole 22 along the circumference. The antenna further includes a fastener (not shown) that passes through the connection hole 22 and connects to the metal shell, thereby fixing the bracket 20 to the metal shell and ensuring the stability of the electrical connection between the conductive layer 30 and the metal shell. Optionally, the connection hole 22 is set 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.

[0065] Combine Figure 1 and Figure 8 As shown, Figure 8 Region 100 in the figure represents 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. 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, within 3 mm of the edge and the second conductive connector 34, thereby being close to the feed port and achieving a shorter conductive path.

[0066] When the antenna is used in an electronic device with a display, the third conductive connector 36 can be used to connect to the display and provide grounding, thereby reducing clutter, reducing interference with the display, and improving antenna efficiency. Optionally, the third conductive connector 36 and the second conductive connector 34 are arranged overlapping along the thickness of the conductive layer 30, so that the grounding point is located close to the feed port, thereby minimizing the conductive path. The third conductive connector 36 can be made of conductive foam, conductive silicone, conductive cloth, etc., adhered to the conductive layer 30. There can be one or more third conductive connectors 36, and their arrangement depends on the antenna's performance requirements.

[0067] In some optional embodiments, the antenna of the present disclosure can achieve different frequency changes by adjusting the size of the main body of the bracket and the conductive layer. Specifically, as the size of the main body of the bracket and the conductive layer decreases, the resonant frequency changes from low to high. Taking the main body of the bracket and the conductive layer as a rectangle as an example, adjusting the size of the main body of the bracket and the conductive layer mainly refers to adjusting the length of the main body of the bracket and the conductive layer, and then adjusting the width of the main body of the bracket and the conductive layer. In this way, the resonant frequency of the antenna can be achieved from 0.5G to 10G.

[0068] See also Figures 9 to 12The following are Smith sum efficiency curves when feeding from the first feed port E1 and the second feed port E2, respectively. The simulation results show that simply feeding from the first feed port E1 without adding any tuning ports can effectively excite both the TE101 and TE103 modes, enabling flexible dual-band operation for GPS and 2.4GHz Wi-Fi. The peak efficiency at GPS is -3.3dB, and at 2.9GHz it is -2.2dB.

[0069] When it is necessary to realize the dual-band antenna of WIFI2.4G and WIFI5G, the lengths of the two sides of the cavity antenna, dx and dy, are not equal. In this way, the high-order mode resonant frequencies of the two sides of the antenna are different, which can extend the high-frequency bandwidth of the antenna. First, without considering the influence of the tuning point, the impedance of the feeding point is directly tuned. The matching circuit used is as follows: Figure 13 The feed port is tuned with S11 as shown in Figure 14 As shown in the figure, the antenna achieves dual-band operation. With the tuning port open, its first resonant frequency is 2.37 GHz, while the second frequency band covers 5.15-5.85 GHz. Furthermore, it can be noted that the antenna has a subtle resonant mode near 4.8 GHz in the high-frequency band.

[0070] Next, tune the antenna through the tuning point, and connect the variable capacitor C1 as the tuning element at this point. At this time, the matching circuit of the antenna is as follows: Figure 6 As shown in Figure 2. When the capacitance of the variable capacitor C1 changes, the S11 of the antenna is as follows: Figure 15 As shown in the figure, the second frequency band of the antenna remains essentially unchanged as the capacitance changes, consistently covering 5.15-5.85 GHz. The first resonant frequency, on the other hand, shows the opposite trend. As the capacitance changes in varying steps from 0.2 pF to 3 pF, the first resonant mode gradually shifts from 1.65-2.27 GHz. It can also be noted that during this switching process, the 4.8 GHz mode, originally located in the high-frequency band, shifts toward the low-frequency band due to the capacitance, now covering the 3.3-4.6 GHz band.

[0071] The change of antenna efficiency during tuning is as follows: Figure 16 As shown in the figure, the antenna's efficiency trend matches S11. Throughout the capacitor switching process, the antenna's efficiency in the 1.65-2.27 GHz range exceeds -5dB. In the 3.3-4.6 GHz range, the antenna's efficiency exceeds -7dB. In the high-frequency band of 5.15-5.85 GHz, the antenna's efficiency remains essentially unchanged with capacitor switching, consistently exceeding -3dB.

[0072] The final simulation results show that the antenna's capacitance can shift the resonant frequencies of the low- and mid-frequency modes downward. As the capacitance increases, the antenna can cover frequencies below 2.37 GHz and 4.8 GHz in both the low- and mid-frequency ranges. Using inductive tuning can shift the resonant frequency upward, achieving wider frequency coverage. Furthermore, when the antenna's tuning port is open, it can achieve different frequency coverage in the low- and mid-frequency ranges.

[0073] See also Figure 1 As shown, the embodiment of the present disclosure also provides an electronic device, which may be an electronic product such as a mobile phone, a tablet computer, a laptop computer, a wearable device, a smart bracelet, a smart watch, smart glasses, etc. The electronic device includes a display screen 90 and an antenna. It should be noted that the antenna described in the above embodiments and implementation methods is also applicable to the electronic device of this embodiment. The display screen 90 is arranged on the first conductive component 10 and is connected to the second conductive component 23 of the antenna. Optionally, the display screen 90 can be connected to the conductive layer 30 of the second conductive component 23, and the display screen 90 and the conductive layer 30 can be connected through the third conductive connector 36. The third conductive connector 36 acts as a grounding component, thereby reducing clutter, reducing interference with the display screen, and improving the efficiency of the antenna.

[0074] It can be seen from the above embodiments that the electronic device disclosed in the present invention adopts the above-mentioned antenna, and forms a cavity with two adjacent openings by enclosing the second conductive component and the first conductive component. The feeding port of the antenna is located at the adjacent position of the two openings, thereby forming a semi-cavity antenna (which can be understood as a semi-cavity model healthy antenna). Compared with the cavity antenna with only one opening in the related technology, it can not only meet the same low-frequency usage conditions, but also reduce the size of the antenna and the occupied volume, thereby reducing costs and mass production risks.

[0075] See also Figure 17 As shown, in some optional embodiments, the electronic device may further include a camera module 80, which is located at a corner of the back of the metal housing. The antenna is located at another corner of the metal housing, avoiding the camera module 80. As can be understood, placing the antenna at another corner of the electronic device, avoiding the camera module 80, reduces the impact of the camera module 80 on the antenna's performance. A gap is reserved between the two open sides of the antenna and the edge of the electronic device for radiation.

[0076] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the disclosure herein. This disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0077] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An antenna, characterized in that: include: A first conductive component and a second conductive component connected to the first conductive component, wherein the second conductive component and the first conductive component enclose a cavity, the cavity comprising two adjacent open sides and two adjacent closed sides; The antenna also includes a first feeding port and a tuning point. The tuning point is provided with an inductive component and is located at the intersection of the two open edges. The first feeding port is provided on one side of one of the open edges and close to the adjacent closed edge. When the antenna is fed at the first feeding port, a first antenna mode and a second antenna mode are simultaneously excited, and the frequency of the second antenna mode is greater than the frequency of the first antenna mode.

2. The antenna according to claim 1, wherein The inductive device is provided with a matching circuit, and the matching circuit is connected to the first feeding port; the matching circuit includes a variable capacitor connected to the first feeding port, and the variable capacitor is grounded.

3. The antenna according to claim 1, wherein The antenna further includes a second feeding port, which is provided at the intersection of the two opening edges; when the antenna is fed at the second feeding port, the first antenna mode is excited as a fundamental mode.

4. The antenna according to claim 3, wherein: The inductive component is provided with a matching circuit, and the matching circuit is connected to the first feeding port and the second feeding port; The matching circuit includes a variable capacitor connected to the first feeding port, and the variable capacitor is grounded; the matching circuit also includes a distributed capacitor and a distributed inductor connected in series and in parallel, and connected to the second feeding port.

5. The antenna according to claim 4, characterized in that The matching circuit includes a capacitor and an inductor connected in parallel and both connected to the second feeding port, and the capacitor is grounded.

6. The antenna according to claim 1, wherein The cavity is rectangular, and the length ratio of the closed side to the open side is between 0.9:1 and 1:

1.

7. The antenna according to claim 1, wherein The distance between the first feeding port and the adjacent closed edge is no more than 4 mm.

8. The antenna according to claim 1, wherein The first conductive component includes a metal shell, and the second conductive component includes a conductive bracket.

9. The antenna according to claim 8, characterized in that The conductive bracket includes a bracket and a conductive layer wrapped around the bracket; the conductive layer is connected to the metal shell, and the bracket, the conductive layer and the metal shell enclose to form the cavity.

10. An electronic device, characterized in that: It comprises a metal shell, a display screen and an antenna as described in any one of claims 1 to 9, wherein the first conductive component is part of the metal shell, and the two opening edges are both arranged toward the edges of the electronic device; the display screen is arranged in the metal shell and connected to the second conductive component.

11. The electronic device according to claim 10, characterized in that It also includes a camera module, which is arranged at a corner of the back side of the metal shell, and the antenna is arranged at other corners of the metal shell avoiding the camera module.

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