Antenna and electronic equipment

Abstract

The invention relates to an antenna and electronic equipment. The antenna comprises a metal shell and a conductive part, the conductive piece is provided with a conductive layer, the conductive piece is connected with the metal shell, and a cavity with an opening is defined by the conductive piece and the metal shell. The antenna further comprises a detection part used for SAR detection, the detection part is connected to the side, back to the metal shell, of the conductive piece, and the detection part is provided with a detection body used for detecting SAR signals. The conductive member and the metal housing are enclosed to form a cavity with an opening, thereby forming a cavity antenna with an opening, reducing the risk of uncertain electric connection, and perfectly maintaining the sealing performance of the cavity, thereby improving the performance of the whole antenna cavity, improving the performance of the antenna, and reducing the cost and the risk of mass production. The detection body of the detection part can be used as an SAR sensor detection body, the SAR detection requirement is met, and meanwhile the antenna radiation performance is not affected.

Description

Technical Field

[0001] This disclosure relates to the field of antenna design technology, and more particularly to an antenna and electronic device. Background Technology

[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. They can also be expanded to install a variety of applications (APPs) to meet people's various needs.

[0003] Smartphones and tablets are now trending towards thinner, lighter designs and higher screen-to-body ratios, with increasingly more metal components used in their exteriors to achieve optimal aesthetics and user experience. However, to meet SAR regulations in CE / FCC standards, conventional designs require forced power reduction at the radio frequency conduction stage to ensure compliance in all scenarios. This design choice can severely impact the user experience. Summary of the Invention

[0004] This disclosure provides an antenna and an electronic device to address the shortcomings of related technologies.

[0005] In a first aspect, embodiments of this disclosure provide an antenna, comprising: a metal housing and a conductive element; the conductive element is provided with a conductive layer, the conductive element is connected to the metal housing, and together with the metal housing, forms a cavity with an opening;

[0006] The antenna also includes a detection unit for SAR detection, connected to the side of the conductive element facing away from the metal housing, and the detection unit is provided with a detection body for detecting SAR signals.

[0007] Optionally, the conductive element has a groove on the side facing away from the metal housing, and the antenna further includes a signal transmission line disposed in the groove, the signal transmission line being electrically connected to the detection body.

[0008] Optionally, the signal transmission line does not protrude from the recessed portion; and / or

[0009] The depth of the groove is at least 0.5 mm.

[0010] Optionally, the signal transmission line includes at least one fixing part, which is fixedly connected to the groove portion.

[0011] Optionally, the signal transmission line includes a first fixing part and a second fixing part, wherein the first fixing part is located on the side closer to the detection part than the second fixing part;

[0012] Wherein, the first fixing part is welded to the groove part; and / or

[0013] The second fixing part is spot-welded or glued to the groove part.

[0014] Optionally, the inner wall of the groove is arc-shaped.

[0015] Optionally, the detection part has a notch corresponding to the groove, and the detection body is at least partially disposed within the notch.

[0016] Optionally, the inner wall of the notch is arc-shaped.

[0017] Optionally, the notch penetrates the sidewall of the detection part opposite to the conductive element; the detection body includes a first detection body and a second detection body, the first detection body is laid on the inner wall of the notch, and the second detection body is laid on at least a portion of the sidewall of the detection part opposite to the conductive element.

[0018] Optionally, the area of ​​the detection body is not less than 30 mm². 2 .

[0019] Optionally, the conductive component includes a bracket, the conductive layer is wrapped around the side surface of the bracket facing away from the metal housing, the edge of the conductive layer is bent toward the metal housing and connected to the metal housing, forming the cavity.

[0020] Optionally, the conductive layer includes a main body and a bent portion, the main body being wrapped around the bracket, the bent portion being formed at least a portion of the edge of the main body and bent toward the metal housing, and the bent portion being connected to the metal housing;

[0021] The main body, the support, the bent portion, and the metal shell together form the cavity, and the opening is formed between the edge of the main body where the bent portion is not formed and the metal shell.

[0022] Optionally, the antenna further includes a first conductive connector disposed between the bent portion of the conductive layer and the metal housing.

[0023] Optionally, a second conductive connector is provided on the side of the conductive layer opposite to the metal housing.

[0024] In a second aspect, embodiments of this disclosure provide an electronic device, including a display screen and an antenna as described in the first aspect, wherein the display screen is assembled on the metal housing and connected to the conductive layer.

[0025] Optionally, it also includes a motherboard, which is equipped with a SAR sensor chip; the detector is electrically connected to the motherboard.

[0026] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0027] As can be seen from the above embodiments, the antenna of this disclosure, with its conductive component and metal housing enclosing an open cavity, constitutes an open cavity antenna. This reduces the risk of uncertain electrical connections and maintains the cavity's airtightness, thereby increasing the overall antenna cavity performance, improving antenna performance, and reducing cost and mass production risks. The detection element of the detection unit can be used as a SAR sensor detection element, meeting SAR detection requirements without affecting the antenna's radiation performance.

[0028] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0029] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0030] Figure 1 This is a partial cross-sectional schematic diagram of an electronic device according to an exemplary embodiment.

[0031] Figure 2 This is a schematic diagram of the structure of a conductive element according to an exemplary embodiment.

[0032] Figure 3 This is a top view of a conductive element according to an exemplary embodiment.

[0033] Figure 4 This is a partially enlarged schematic diagram of a conductive element according to an exemplary embodiment.

[0034] Figure 5 This is a schematic diagram of the back of the support and conductive layer according to an exemplary embodiment.

[0035] Figure 6 This is a front view of the support and conductive layer according to an exemplary embodiment.

[0036] Figure 7 This is a diagram showing the radiation efficiency and overall efficiency of an antenna obtained through simulation, according to an exemplary embodiment.

[0037] Figure 8 This is a current distribution diagram of an antenna, taking a 5G antenna as an example, according to an exemplary embodiment.

[0038] Figure 9 This is a mode analysis diagram of an antenna according to an exemplary embodiment.

[0039] Figures 10 to 12 This is a current distribution diagram of an antenna at different resonant frequencies, according to an exemplary embodiment. Detailed Implementation

[0040] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0041] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0042] To facilitate understanding of the technical solutions of this disclosure, the antenna and electronic equipment of this disclosure will be described in detail below with reference to the accompanying drawings. Unless otherwise specified, the features in the following embodiments and implementations can be combined with each other.

[0043] See Figures 1 to 3 As shown, this disclosure provides an antenna applicable to electronic products such as mobile phones, tablets, laptops, smart glasses, smartwatches, smart bracelets, and wearable devices. The antenna includes a metal housing 10 and a conductive element. The conductive element has a conductive layer 30, is connected to the metal housing 10, and forms a cavity 41 with an opening 40. The antenna also includes a detection unit 50 for SAR detection, connected to the side of the conductive element facing away from the metal housing 10. The detection unit 50 has a detection body 51 for detecting SAR signals. Optionally, the area of ​​the detection body 51 is not less than 30 mm². 2 In order to achieve the detection function.

[0044] Optionally, the metal housing 10 can be the mid-frame housing or the back cover of an electronic device. The conductive layer 30 can be a copper foil layer. The conductive layer 30 can be a flexible printed circuit (FPC) or other conductive layers, such as LDS (Laser-Direct-structuring) laser forming process layers, PDS (Printing Direct Structure) pad printing process layers, etc.

[0045] As can be seen from the above embodiments, the antenna of this disclosure forms a cavity 41 with an opening 40 by enclosing the conductive component and the metal housing 10, thus constituting a cavity 41 antenna with an opening 40. This reduces the risk of uncertain electrical connections and maintains the airtightness of the cavity 41, thereby increasing the overall performance of the antenna cavity 41, improving antenna performance, and reducing cost and mass production risks. The detection element 51 of the detection unit 50 can be used as the detection element of a SAR sensor, meeting SAR detection requirements without affecting the antenna radiation performance. It does not change the product appearance or increase costs. The antenna design provided by this disclosure, while meeting the requirements of cavity mode antenna design, can also realize SAR detection of the cavity mode antenna, thus ensuring that the antenna can operate at normal power in scenarios where there is no physical contact with the antenna. This enhances the user's signal experience.

[0046] When a user's body approaches the antenna, the application scenario is triggered, and the electronic device reduces its power to comply with SAR regulations in CE / FCC. When no human body is detected, the electronic device maintains normal power to improve the user experience. SAR stands for Specific Absorption Rate. When a human body approaches the antenna, the device needs to reduce power to meet SAR regulations in CE / FCC and protect human safety. When no human body is nearby, normal power is maintained to improve the user experience. An SAR sensor chip can be installed on the mainboard of the electronic device. The detection signal can be transmitted from the mainboard to the detection device via a connecting cable, achieving the purpose of detecting the approach and departure of a human body, thereby controlling different power reductions to provide the user with the optimal performance experience.

[0047] In some optional embodiments, the conductive element has a recessed portion 60 on the side facing away from the metal housing 10. The antenna also includes a signal transmission line 61 (e.g., a cable) disposed within the recessed portion 60. The signal transmission line 61 is electrically connected to the detector 51 and can be electrically connected to the motherboard of the electronic device, realizing the electrical connection between the detector 51 and the motherboard. After the signal transmission line 61 transmits the SAR signal to the motherboard, the RF SW (radio frequency switch) of the electronic device connects the signal to the PCB and connects it to the signal lines and reference lines of the SAR sensor chip to achieve the purpose of SAR sensor detection.

[0048] The detection signal can be transmitted from the motherboard to the detection object via signal transmission line 61, achieving the purpose of detecting the approach and departure of a human body, thereby controlling different power back-offs and providing users with the optimal performance experience. It should be noted that the routing of signal transmission line 61 should avoid high-heat-generating components and modules in electronic devices, such as the CPU, power management unit, camera, charging IC, etc., to prevent temperature drift in the SAR sensor path.

[0049] In some optional embodiments, the signal transmission line 61 does not protrude from the recessed portion 60; that is, the signal transmission line 61 is within the recessed portion 60, and its height direction Z does not protrude beyond the surface of the cavity antenna, preventing the signal transmission line 61 from causing top-printing on the display screen. Optionally, the depth of the recessed portion 60 is at least 0.5 mm to provide space for the signal transmission line 61. It should be noted that the depth and width of the recessed portion 60 can be adjusted according to the diameter of the signal transmission line 61, satisfying the requirement of accommodating the signal transmission line 61 while ensuring that the signal transmission line 61 does not protrude from the recessed portion 60.

[0050] In some optional embodiments, the signal transmission line 61 includes at least one fixing part, which is fixedly connected to the groove portion 60. On one hand, the signal transmission line 61 is fixed to the groove portion 60 by the fixing part, which serves to stabilize its position. On the other hand, the fixing of the signal transmission line 61 to the groove portion 60 by the fixing part achieves a grounding effect, providing a good shielding effect for SAR detection signals.

[0051] In this embodiment, the signal transmission line 61 includes a first fixing part 62 and a second fixing part 63. The first fixing part 62 is located on the side closer to the detection part 50 than the second fixing part 63. The first fixing part 62 is welded to the groove part 60, which serves both as a stable positioning element and as a grounding element. The second fixing part can be connected to the groove part 60 by spot welding, adhesive application, or other fixing methods.

[0052] See Figure 4 As shown, in some optional embodiments, the inner wall of the groove 60 is arc-shaped. It is understood that the signal transmission line 61 includes an inner core 611, and the signal transmission line 61 is soldered to the detection body 51 at the inner core 611. It is understood that since the plane where the detection body 51 is located is higher than the plane where the cavity antenna is located, i.e., the top surface of the conductive layer 30, if the inner wall of the groove 60 is a right angle, it is inconvenient to mount the FPC at vertical angles / right angles. Therefore, the inner wall of the groove 60 is set to be arc-shaped, with a slope (e.g., ...). Figure 4 (As shown at point A) This allows the signal transmission line 61 to transition slowly from the top surface of the conductive layer 30 to the plane where the detection body 51 is located, preventing excessive curvature and loss during production.

[0053] In some optional embodiments, the detection part 50 has a notch 52 corresponding to the groove part 60, and the detection body 51 is at least partially disposed within the notch 52. Optionally, the inner wall of the notch 52 is arc-shaped. Similarly, the inner wall of the notch 52 is arc-shaped, and a slope is set (e.g., Figure 4 As shown at point B / C, the signal transmission line 61 transitions slowly from the top surface of the conductive layer 30 to the plane where the detection body 51 is located, which can prevent the loss problem caused by excessive curvature during production.

[0054] Optionally, the notch 52 penetrates the sidewall of the detection section 50 opposite to the conductive element. The detection body 51 includes a first detection body 511 and a second detection body 512. The first detection body 511 is disposed on the inner wall of the notch 52, and the second detection body 512 is disposed on at least a portion of the sidewall of the detection section 50 opposite to the conductive element. In this embodiment, the second detection body 512 is disposed from both ends of the first detection body 511 on at least a portion of the sidewall of the detection section 50 opposite to the conductive element. This can improve the accuracy of SAR detection.

[0055] In some alternative implementations, the detection body 51 can be a copper foil layer. Soldered to the surface of the detection unit 50, the solder joint of the detection body 51 needs a gradual, curved transition to the entire plane of the detection body 51. The routing direction of the signal transmission line 61 within the cavity antenna is not fixed and can be adjusted according to actual conditions. Optionally, the signal transmission line 61 can also be replaced with other electrical connection methods to achieve the corresponding transmission function, but because the signal of the SAR detection sensor is extremely sensitive, the shielding performance must be optimally considered.

[0056] In some alternative implementations, see [link to implementation details]. Figure 5 and Figure 6 As shown, Figure 5 This is a schematic diagram of the back of the support and conductive layer according to an exemplary embodiment, that is, the side of the conductive layer facing the metal housing. Figure 6 This is a front view of the support and conductive layer according to an exemplary embodiment, that is, the side of the conductive layer facing away from the metal housing. In some optional embodiments, the conductive element may further include a support 20, with the conductive layer 30 wrapped around the side of the support 20 facing away from the metal housing. The edge of the conductive layer 30 is folded towards the metal housing 10 and connected to the metal housing 10, thereby enclosing and forming the cavity 41. Optionally, the support 20 may include a plastic support or a support made of other insulating materials, which can support the conductive layer 30 and increase its stability. It is understood that the groove 60 is recessed from the side of the support 20 facing away from the metal housing 10, and the conductive layer 30 is laid on the side of the support 20 facing away from the metal housing 10 and the entire surface of the groove 60. Optionally, the detection part 50 may extend from the side of the support 20 facing away from the metal housing 10 and be integrally formed with the support 20.

[0057] Further, the conductive layer 30 may include a main body 31 and a bent portion 32. The main body 31 is wrapped around the support 20, and the bent portion 32 is formed at least part of the edge of the main body 31 and bends toward the metal housing 10. The bent portion 32 is connected to the metal housing 10. The main body 31, the support 20, the bent portion 32, and the metal housing 10 enclose the cavity 41, and the opening 40 is formed between the edge of the main body 31 where the bent portion 32 is not formed and the metal housing 10. Optionally, the metal housing 10 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 may be integrally formed to form a unibody metal back shell.

[0058] It should be noted that the size of the opening can be adjusted according to actual needs to match different antenna frequency bands. For example, the main body can be further bent near the edge of the opening to form a smaller bend, thereby changing and controlling the length and width of the opening. The degree of bending can be set according to actual needs.

[0059] Optionally, the support 20 is rectangular, the main body 31 of the conductive layer 30 is rectangular, and the three edges of the main body 31 are bent toward the metal housing 10 to form a bent part 32 and connected to the metal housing 10. An opening is reserved on the other edge, so that the conductive layer is connected to the metal housing on three sides and has an opening on one side, forming a completely sealed cavity, thereby improving the overall antenna cavity performance.

[0060] In some optional embodiments, the bending portion 32 includes a first bending segment 321 and a second bending segment 322. The first bending segment 321 bends from the main body 31 along a first direction Z, and the second bending segment 322 bends from the first bending segment 321 along a second direction X. The second bending segment 322 is connected to the metal housing 10. Thus, the connection between the conductive layer and the metal housing is achieved through the structure of the bending portion. Furthermore, the design of the bending portion increases the flexibility of debugging and reduces the prototyping cycle. Optionally, the first direction Z is perpendicular to the second direction X, and the first direction Z is... Figure 1 The image shown can be understood as the longitudinal direction, and the second direction X is... Figure 1 The image shown can be interpreted as horizontal.

[0061] In some optional embodiments, the antenna may further include a first conductive connector 33 disposed between the bent portion of the conductive layer 30 and the metal housing 10, thereby achieving an electrical connection between the conductive layer 30 and the metal housing 10. Optionally, there may be multiple first conductive connectors 33, spaced apart along the length of the bent portion of the conductive layer 30. The first conductive connectors 33 may be gold-plated conductive foam, conductive silicone, conductive cloth, etc., adhered to the bent portion of the conductive layer 30. It is understood that the conductive layer 30 and the metal housing 10 are contacted and connected through the first conductive connectors 33, thereby achieving an electrical connection between the conductive layer 30 and the metal housing 10, forming a cavity 41 enclosed by the conductive layer 30, the first conductive connectors 33, and the metal housing 10 within a confined space.

[0062] In this embodiment, the second bending segment 322 is provided with a plurality of first conductive connectors 33 spaced apart along its length. The first conductive connectors 33 are connected to the metal shell 10, that is, the first conductive connectors 33 are connected between the second bending segment 322 and the metal shell 10, realizing the electrical connection between the conductive layer 30 and the metal shell 10. The main body 31, the bracket 20, the first bending segment 321, the second bending segment 322, the first conductive connectors 33, and the metal shell 10 enclose 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 the reliability of the electrical connection. Optionally, the first conductive connectors 33 can be gold-plated conductive foam, conductive silicone, conductive cloth, etc., pasted on the second bending segment 322 of the conductive layer 30.

[0063] Optionally, the bent portion 32 surrounds the edges of the main body 31 except for the edge corresponding to the opening 40. Multiple first conductive connectors 33 are spaced apart along the length of the bent portion 32. These first conductive connectors 33 are connected to the metal housing 10, thereby achieving an electrical connection between the conductive layer 30 and the metal housing 10. The main body 31, the support 20, the bent portion 32, the first conductive connectors 33, and the metal housing 10 together form the cavity 41.

[0064] There can be one or more first conductive connectors 33. When there are multiple first conductive connectors 33, they can be arranged at intervals corresponding to the edges of the main body 31 of the conductive layer 30, excluding the edge corresponding to the edge of the opening 40, thereby surrounding the cavity mode antenna and improving antenna performance. When there is only one first conductive connector 33, it is arranged in a ring around the edges of the main body 31 of the conductive layer 30, excluding the edge corresponding to the edge of the opening 40. For example, the support 20 is rectangular, the main body 31 of the conductive layer 30 is rectangular, three edges of the main body 31 are bent towards the metal housing 10 to form bent portions 32 and connected to the metal housing 10, and an opening is reserved on the other edge. The bent portions 32 surround the three edges of the main body 31, excluding the edge corresponding to the edge of the opening 40. The first conductive connectors 33 are correspondingly arranged in a ring between the bent portions 32 and the metal housing 10, which can improve the sealing and the reliability and stability of the electrical connection.

[0065] In some alternative embodiments, the bracket 20 has a notch 21 corresponding to the opening 40, and a feed element can be installed at the notch 21. It is understood that the main body 31 does not form the edge of the bent portion 32, meaning that the feed element is installed at the edge of the main body 31 corresponding to the opening 40, and the feed element can serve as the feed point for the antenna. Optionally, the size of the notch 21 can be 3*5mm, and the feed element can be a small circuit board.

[0066] In some optional embodiments, the bracket 20 has at least one connection hole 22 along its circumference. The antenna also includes a fastener (not shown) that passes through the connection hole 22 and connects to the metal housing 10, thereby fixing the bracket 20 to the metal housing 10 and ensuring the stability of the electrical connection between the conductive layer 30 and the metal housing 10. Optionally, the connection hole 22 is positioned approximately 1 mm away from the conductive layer 30. The connection hole 22 can be a screw hole, and the fastener can be a screw. The figure shows four connection holes 22 as an example.

[0067] In some alternative implementations, Figure 6 Region 100 is the antenna region. A second conductive connector 36 may be provided on the side of the conductive layer 30 facing away from the metal housing 10. When the antenna is used in an electronic device with a display screen, the second conductive connector 36 can be used to connect to the display screen, serving as a grounding function, thereby reducing noise, minimizing interference to the display screen, and improving antenna efficiency. Optionally, the second conductive connector 36 can be conductive foam, conductive silicone, conductive cloth, etc., adhered to the conductive layer 30. The number of second conductive connectors 36 can be one or more, arranged according to antenna performance requirements. It should be noted that the signal transmission line 61 should avoid the second conductive connector 36 when designing its routing path to reduce the impact on grounding effectiveness.

[0068] In some alternative embodiments, the support 20 includes a first surface and a second surface opposite to the first surface. The main body 31 wraps around the first surface, and the bent portion 32 extends from one side of the first surface toward one side of the second surface and at least partially protrudes from the second surface. It is understood that the first surface is the side away from the metal housing, the second surface is the side closer to the metal housing, the conductive layer 30 wraps around the side of the support 20 away from the metal housing 10, and the bent portion 32, after bending from the main body 31, covers the support 20 in the middle, improving the stability of the support and the conductive layer.

[0069] In some optional embodiments, the metal casing 10 includes a bottom wall 11 and a side wall 12 connected to the bottom wall 11. The cavity 41 formed by the conductive layer 30 and the metal casing 10 can be disposed in a region of the bottom wall 11 not close to the side wall 12, with the conductive layer 30 cooperating with the bottom wall 11 to form the cavity 41. Alternatively, the cavity 41 formed by the conductive layer 30 and the metal casing 10 can be disposed in a corner region of the bottom wall 11 close to the side wall 12, with the conductive layer 30 cooperating with the bottom wall 11 and the side wall 12 to form the cavity 41. Several scenarios are possible:

[0070] (1) The main body 31 may be rectangular. A first bend, a second bend, and a third bend are sequentially formed on the three sides of the main body 31. All three bends are connected to the metal casing 10. The main body 31, the first bend, the second bend, the third bend, and the metal casing 10 together form the cavity 41. It is understood that the first bend, the second bend, and the third bend are all connected to the bottom wall 11. The main body 31, the first bend, the second bend, the third bend, and the bottom wall 11 together form the cavity 41. That is, the cavity 41 is located in the area of ​​the bottom wall 11 that is not close to the side wall 12. The three edges of the main body 31 form bends that connect to the bottom wall 11, forming a cavity structure with a three-sided conductive layer and a single casing.

[0071] (2) The main body 31 may be rectangular. A first bend is formed on the first side edge of the main body 31, and a second bend is formed on the second side edge adjacent to the first side. Both the first and second bends are connected to the bottom wall 11. The main body 31 is connected to the third side and the side wall 12 adjacent to the second side. The main body 31, the first bend, the second bend, the side wall 12, and the bottom wall 11 enclose the cavity 41. That is, the cavity 41 is located in the corner area of ​​the bottom wall 11 near the side wall 12. The two edges of the main body 31 form bends that connect to the bottom wall 11, forming a cavity structure with two conductive layers and two shells.

[0072] (3) The main body 31 may be rectangular. A first bend is formed on the first side edge of the main body 31, and a second bend is formed on the second side edge opposite to the first side edge. Both the first bend and the second bend are connected to the metal shell 10. The main body 31, the first bend, the second bend, and the metal shell 10 enclose the cavity 41. It is understood that both the first bend and the second bend are connected to the bottom wall 11. The main body 31, the first bend, the second bend, and the bottom wall 11 enclose the cavity 41. That is, the cavity 41 is located in the area of ​​the bottom wall 11 that is not close to the side wall 12. The two edges of the main body 31 form bends that connect to the bottom wall 11, forming a cavity structure with two conductive layers and one shell.

[0073] (4) The main body 31 may be rectangular. A first bend is formed on the first side edge of the main body 31, and the first bend is connected to the bottom wall 11. The second side of the main body 31 opposite to the first side is connected to the side wall 12. The main body 31, the first bend, the side wall 12, and the bottom wall 11 enclose the cavity 41. That is, the cavity 41 is located in the corner area of ​​the bottom wall 11 near the side wall 12. One edge of the main body 31 forms a bend that connects to the bottom wall 11, forming a cavity structure with a conductive layer on one side and shells on both sides.

[0074] In some optional embodiments, the antenna of this disclosure can achieve different frequencies by adjusting the size of the main body of the support and conductive layer. Specifically, as the size of the shield increases, the resonant frequency decreases. As the size of the main body of the support and conductive layer decreases, the resonant frequency increases. Taking a rectangular main body of the support and conductive layer as an example, adjusting the size of the main body primarily refers to adjusting the length of the main body, and secondarily to adjusting the width. Through this method, the resonant frequency of the antenna can be achieved from 0.5 GHz to 10 GHz.

[0075] See Figure 7 and Figure 8 As shown, Figure 7 The diagram shows the radiation efficiency and total efficiency of the antenna disclosed in this invention, obtained through simulation. Figure 8 The diagram shown illustrates the current distribution of the antenna disclosed herein, using a 5G antenna as an example. It can be seen that the antenna exhibits high radiation efficiency and overall efficiency, with a relatively high current distribution in the plane, resulting in superior antenna performance. Furthermore, the antenna of this disclosure, while ensuring performance, utilizes materials such as the shielding cavity mold, metal springs, and conductive foam, which reduce material costs compared to the support cavity mold, spot-welded springs, and foam used in related technologies.

[0076] See Figures 9 to 12 As shown, Figure 9 The diagram shown is a mode analysis diagram of the antenna disclosed herein. Figures 10 to 12 The diagrams show the current distribution at resonant frequencies 2, 3, and 4. The initial dimensions of the cavity are 23*14mm. Mode analysis shows F as the antenna feed point, in offset feeding mode. ABCD represents the four corners of the cavity. The first resonant frequency of the antenna is formed from A to F, with a resonant frequency of 1. Higher-order modes are formed within ABCD inside the cavity, with a resonant frequency of 2 at multiple nulls. A third resonant frequency of 3 is formed between B and F. A fourth resonant frequency of 4 is formed between AB. In offset feeding mode, the frequency correspondence is: Resonant frequency 1 > Resonant frequency 3 > Resonant frequency 4. Resonant frequency 2 is a higher-order mode frequency, and its magnitude needs to be determined by referring to the overall cavity mode dimensions (i.e., the cavity itself).

[0077] See you again Figure 1 As shown, this disclosure also provides an electronic device, which can be, for example, a mobile phone, tablet computer, laptop computer, wearable device, smart bracelet, smartwatch, smart glasses, and other electronic products. The electronic device includes a display screen 90 and an antenna. It should be noted that the antenna described in the above embodiments and implementations is also applicable to the electronic device of this embodiment. The display screen 90 is assembled on the metal housing 10 and connected to the conductive layer 30 of the antenna. Optionally, the display screen 90 and the conductive layer 30 can be connected via a second conductive connector 36, which serves as a grounding element, thereby reducing noise, reducing interference to the display screen, and improving the efficiency of the antenna.

[0078] As can be seen from the above embodiments, the electronic device of this disclosure, by employing the aforementioned antenna, can increase the overall performance of the antenna cavity, improve antenna performance, and reduce costs and mass production risks. Furthermore, the use of a conductive layer structure increases the flexibility of antenna performance tuning during the R&D phase and shortens the prototyping cycle. Simultaneously, the detection element on the detection unit can be used as a SAR sensor detection element for the electronic device, meeting SAR detection requirements without affecting antenna radiation performance, altering product appearance, or increasing costs. When a user's body approaches the antenna, the application scenario is triggered, and the electronic device reduces power to meet SAR regulations in CE / FCC. When no human body is detected approaching, the electronic device maintains normal power to improve the user experience.

[0079] In some alternative implementations, the electronic device may further include a motherboard equipped with a SAR sensor chip, and the detector 51 is electrically connected to the motherboard. In this way, the detection signal can be transmitted from the motherboard to the detector via a signal transmission line, achieving the purpose of detecting the approach and departure of a human body, thereby controlling different power back-offs and providing the user with an optimal performance experience.

[0080] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0081] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. An antenna, characterized in that, include: A metal casing and a conductive component; the conductive component is provided with a conductive layer, the conductive component is connected to the metal casing, and together with the metal casing, they form a cavity with an opening; The antenna also includes a detection unit for SAR detection, connected to the side of the conductive element facing away from the metal housing, and the detection unit is provided with a detection body for detecting SAR signals.

2. The antenna according to claim 1, characterized in that, The conductive element has a groove on the side facing away from the metal housing. The antenna also includes a signal transmission line disposed in the groove, and the signal transmission line is electrically connected to the detection body.

3. The antenna according to claim 2, characterized in that, The signal transmission line does not protrude from the recessed portion; and / or The depth of the groove is at least 0.5 mm.

4. The antenna according to claim 2, characterized in that, The signal transmission line includes at least one fixing part, which is fixedly connected to the groove portion.

5. The antenna according to claim 4, characterized in that, The signal transmission line includes a first fixing part and a second fixing part, wherein the first fixing part is located on the side closer to the detection part than the second fixing part; Wherein, the first fixing part is welded to the groove part; and / or The second fixing part is spot-welded or glued to the groove part.

6. The antenna according to claim 2, characterized in that, The inner wall of the groove is arc-shaped.

7. The antenna according to claim 2, characterized in that, The detection section has a notch corresponding to the groove, and the detection body is at least partially disposed within the notch.

8. The antenna according to claim 7, characterized in that, The inner wall of the notch is arc-shaped.

9. The antenna according to claim 7, characterized in that, The notch penetrates the side wall of the detection part opposite to the conductive element; the detection body includes a first detection body and a second detection body, the first detection body is laid on the inner wall of the notch, and the second detection body is laid on at least a portion of the side wall of the detection part opposite to the conductive element.

10. The antenna according to claim 1, characterized in that, The area of ​​the detection body is not less than 30 mm². 2 .

11. The antenna according to claim 1, characterized in that, The conductive component includes a bracket, and the conductive layer is wrapped around the side surface of the bracket facing away from the metal housing. The edge of the conductive layer is bent toward the metal housing and connected to the metal housing to form the cavity.

12. The antenna according to claim 11, characterized in that, The conductive layer includes a main body and a bent portion. The main body is wrapped around the bracket. The bent portion is formed at least a portion of the edge of the main body and bends toward the metal shell. The bent portion is connected to the metal shell. The main body, the support, the bent portion, and the metal shell together form the cavity, and the opening is formed between the edge of the main body where the bent portion is not formed and the metal shell.

13. The antenna according to claim 11, characterized in that, The antenna also includes a first conductive connector disposed between the bent portion of the conductive layer and the metal housing.

14. The antenna according to claim 11, characterized in that, The conductive layer has a second conductive connector on the side opposite to the metal casing.

15. An electronic device, characterized in that, It includes a display screen and an antenna as described in any one of claims 1-14, wherein the display screen is assembled into the metal housing and connected to the conductive layer.

16. The electronic device according to claim 15, characterized in that, It also includes a motherboard, which is equipped with a SAR sensor chip; the detector is electrically connected to the motherboard.

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