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 conductive layer is provided with an annular hollow part, the annular hollow part divides the conductive layer into a first conductive area located outside the annular hollow part and a second conductive area located inside the annular hollow part, and the second conductive area is used for being electrically connected with an SAR sensor chip. The first conductive area is connected with the metal shell. According to the antenna, the conductive part and the metal shell are enclosed to form the cavity with the opening, so that the cavity antenna with the opening is formed, the uncertain electric connection risk can be reduced, the sealing performance of the cavity can be well maintained, and the performance of the whole antenna cavity is improved. And meanwhile, the second conductive region separated by the annular hollow part can form suspended metal to be used as an SAR sensor detection body, and the radiation performance of the antenna is not influenced.

Description

TECHNICAL FIELD

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

[0002] Nowadays, mobile phones or PAD terminals are developing towards thinner and higher screen-to-body ratio. In the pursuit of extreme appearance and user experience, more and more metal is used in the appearance of the terminals. In conventional design, in order to meet the SAR regulations in CE / FCC, the power needs to be reduced at the radio frequency transmission end, and the SAR regulations need to be met in any scenario, which will seriously affect the user experience. SUMMARY

[0003] The present disclosure provides an antenna and an electronic device to solve the problems in the related art.

[0004] In a first aspect, an antenna is provided, comprising: a metal shell and a conductive piece; the conductive piece is provided with a conductive layer, the conductive piece is connected with the metal shell, and the metal shell and the conductive piece form a cavity with an opening;

[0005] The conductive layer is formed with an annular hollow part, the annular hollow part separates the conductive layer into a first conductive area outside the annular hollow part and a second conductive area inside the annular hollow part, the second conductive area is used for electrical connection with a SAR sensor chip; the first conductive area is connected with the metal shell.

[0006] Optionally, the conductive piece comprises a support, and the conductive layer is wrapped around the support.

[0007] Optionally, the conductive layer comprises a main body part and a bent part, the main body part is wrapped around the support and is formed with the annular hollow part, the bent part is formed at at least part of the edge of the main body part and is bent towards the metal shell, and the bent part is connected with the metal shell.

[0008] The main body part, the support, the bent part and the metal shell form the cavity, and the edge of the main body part, which is not formed with the bent part, forms the opening between the metal shell.

[0009] Optionally, the bent part comprises a first bent segment and a second bent segment, the first bent segment is bent from the main body part in a first direction, and the second bent segment is bent from the first bent segment in a second direction, and the second bent segment is connected with the metal shell.

[0010] Optionally, a plurality of first conductive connecting pieces are arranged at intervals along the length direction of the second bent segment, and the first conductive connecting pieces are connected with the metal shell.

[0011] Optionally, the bending portion is arranged around other edges of the main body portion except for edges corresponding to the opening; and a plurality of first conductive connectors are arranged at intervals along the length direction of the bending portion, and the first conductive connectors are connected with the metal shell.

[0012] Optionally, the bracket comprises a first surface and a second surface opposite to the first surface, the main body portion is wrapped around the first surface, and the bending portion extends from one side of the first surface to one side of the second surface and at least partially protrudes from the second surface.

[0013] Optionally, the main body portion is rectangular, three side edges of the main body portion are sequentially formed with a first bending portion, a second bending portion and a third bending portion, the first bending portion, the second bending portion and the third bending portion are all connected with the metal shell; and the main body portion, the first bending portion, the second bending portion, the third bending portion and the metal shell enclose the cavity.

[0014] Optionally, the metal shell comprises a bottom wall and a side wall connected with the bottom wall; the main body portion is rectangular, a first side edge of the main body portion is formed with a first bending portion, a second side edge adjacent to the first side of the main body portion is formed with a second bending portion, the first bending portion and the second bending portion are both connected with the bottom wall, and a third side adjacent to the second side of the main body portion is connected with the side wall; and the main body portion, the first bending portion, the second bending portion, the side wall and the bottom wall enclose the cavity.

[0015] Optionally, the main body portion is rectangular, a first side edge of the main body portion is formed with a first bending portion, a second side edge opposite to the first side of the main body portion is formed with a second bending portion, the first bending portion and the second bending portion are both connected with the metal shell; and the main body portion, the first bending portion, the second bending portion and the metal shell enclose the cavity.

[0016] Optionally, the metal shell comprises a bottom wall and a side wall connected with the bottom wall; the main body portion is rectangular, a first side edge of the main body portion is formed with a first bending portion, the first bending portion is connected with the bottom wall, and a second side opposite to the first side of the main body portion is connected with the side wall; and the main body portion, the first bending portion, the side wall and the bottom wall enclose the cavity.

[0017] Optionally, a power feeding member is further arranged at the opening; the power feeding member is electrically connected with the second conductive area, and the second conductive area feeds power outward through the power feeding member.

[0018] Optionally, the conductive member is provided with a notch portion corresponding to the opening, and the power feeding member is arranged at the notch portion.

[0019] Optionally, the feeding member is provided with a third conductive connecting member, which is electrically connected with the second conductive area.

[0020] Optionally, the conductive layer is provided with a plurality of first conductive connecting members, which are connected with the metal shell; the plurality of first conductive connecting members are arranged along the circumference of the side of the conductive layer which does not correspond to the opening.

[0021] Optionally, the side of the conductive layer away from the metal shell is provided with a second conductive connecting member.

[0022] Optionally, the annular hollow part is square-shaped and formed in the middle region of the conductive layer.

[0023] In a second aspect, the embodiments of the present disclosure provide an electronic device, which comprises a display screen and the antenna as described in the first aspect, the display screen is assembled to the metal shell and connected with the conductive layer.

[0024] Optionally, the electronic device further comprises a mainboard, which is provided with a SAR sensor chip and electrically connected with the second conductive area of the antenna.

[0025] The technical solutions provided by the embodiments of the present disclosure can have the following beneficial effects:

[0026] As can be seen from the above embodiments, the antenna of the present disclosure, the conductive member and the metal shell enclose a cavity with an opening, thereby constituting a cavity antenna with an opening, which can reduce the risk of uncertain electrical connection, and can perfectly maintain the sealing of the cavity, thereby increasing the performance of the entire antenna cavity, improving the performance of the antenna, reducing the cost and the risk of mass production. Moreover, the structure of the conductive layer can increase the flexibility of debugging and reduce the proofing cycle. At the same time, the second conductive area separated by the annular hollow part can form a suspended metal as a SAR sensor detection body for use, while not affecting the antenna radiation performance.

[0027] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0028] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present disclosure and, together with the specification, serve to explain the principles of the present disclosure.

[0029] Figure 1 is a partial cross-sectional schematic diagram of an electronic device according to an exemplary embodiment.

[0030] Figure 2 is a front view schematic diagram of a conductive layer according to an exemplary embodiment.

[0031] Figure 3 is a schematic view of the back of the conductive layer according to an example embodiment.

[0032] Figure 4 is a schematic view of a partial enlarged view of the conductive layer according to an example embodiment.

[0033] Figure 5 is a schematic view of the back of the bracket and the conductive layer according to an example embodiment.

[0034] Figure 6 is a schematic view of the front of the bracket and the conductive layer according to an example embodiment.

[0035] Figure 7 and Figure 8 is a radiation efficiency and total efficiency diagram of an antenna according to an example embodiment.

[0036] Figure 9 is a current distribution diagram of an antenna according to an example embodiment, taking a 5G antenna as an example.

[0037] Figure 10 is a mode analysis diagram of an antenna according to an example embodiment.

[0038] Figures 11 to 13 is a current distribution diagram of an antenna according to an example embodiment, in different resonant frequency cases. DETAILED DESCRIPTION

[0039] The example embodiments will be described in detail herein with reference to the attached drawings. In the following description, the same numbers refer to the same or similar elements throughout the description. The embodiments described in the following example embodiments are not representative of all embodiments consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the present disclosure, as detailed in the appended claims.

[0040] The terms used in the present disclosure are merely for the purpose of describing particular embodiments and are not intended to limit the present disclosure. As used in the present disclosure and the appended claims, singular forms "a," "an," and "the" are intended to include plural forms, unless the context clearly indicates otherwise. It will be further understood that the term "and / or" as used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0041] In order to facilitate understanding of the technical solutions of the present disclosure, the antenna and electronic device of the present disclosure will be described in detail below with reference to the drawings. The features in the following embodiments and implementation manners can be combined with each other without conflict.

[0042] Referring to Figures 1 to 4 as shown, Figure 1 is a partial cross-sectional schematic view of an electronic device according to an example embodiment. Figure 2 is a front view of a conductive layer according to an example embodiment, i.e. the side of the conductive layer facing away from the metal shell. Figure 3 is a back view of a conductive layer according to an example embodiment, i.e. the side of the conductive layer facing towards the metal shell. Figure 4 is a partial enlarged view of a conductive layer according to an example embodiment. The present disclosure provides an antenna applicable to electronic products such as mobile phones, tablets, laptops, smart glasses, smart watches, smart bracelets, wearable devices, etc. The antenna comprises a metal shell 10 and a conductive member provided with a conductive layer 30, the conductive member being connected to the metal shell 10 and enclosing the metal shell 10 to form a cavity 41 with an opening 40.

[0043] The conductive layer 30 is formed with an annular hollowed-out portion 36, which separates the conductive layer 30 into a first conductive region 37 outside the annular hollowed-out portion 36 and a second conductive region 38 inside the annular hollowed-out portion 36, the second conductive region 38 being used for electrical connection with a SAR sensor chip. In this way, the second conductive region 38 separated on the conductive layer 30 by the annular hollowed-out portion 36 can form a suspended metal for use as a SAR detection body of an electronic device, meeting the SAR detection requirement. In practical applications, the second conductive region 38 can be electrically connected to the SAR sensor chip to realize the SAR detection function. The first conductive region 37 is connected to the metal shell 10, so that the conductive member and the metal shell 10 enclose the cavity 41. It can be understood that the first conductive region 37 and the second conductive region 38 are separated from each other by the annular hollowed-out portion 36 and do not conduct to each other.

[0044] Optionally, the metal shell 10 can be a middle frame shell or a back cover of an electronic device. The conductive layer 30 can be a copper foil layer, and the annular hollowed-out portion 36 is a non-conductive region. In practical applications, the copper foil layer can be removed in the region where the annular hollowed-out portion 36 is needed to be formed, so as to form the annular hollowed-out portion 36. The conductive layer 30 can be a flexible printed circuit (FPC) or other conductive layers such as a laser direct structuring (LDS) laser forming process layer, a printing direct structure (PDS) pad printing process layer, etc.

[0045] As can be seen from the above embodiments, the antenna of the present disclosure, the conductive part and the metal shell 10 form a cavity 41 with an opening 40, thereby constituting a cavity antenna with an opening 40, which can reduce the risk of uncertain electrical connection, and can perfectly maintain the sealing of the cavity 41, thereby increasing the performance of the entire antenna cavity 41, improving the antenna performance, reducing the cost and mass production risk. Moreover, the structure of the conductive layer can increase the flexibility of antenna performance debugging in the research and development stage, and reduce the sample making period. At the same time, the second conductive area separated by the annular hollow part on the conductive layer can form a suspended metal as an SAR sensor detection body of the electronic device, which meets the SAR detection requirement, and does not affect the antenna radiation performance, does not change the product appearance, and does not increase the cost. When the user's body is close to the antenna, the application scenario is triggered, and the electronic device reduces the power to meet the SAR regulations in CE / FCC. When the human body is not detected close to the antenna, the power of the electronic device is maintained in a normal state to improve the user experience. Wherein, SAR: Specific Absorption Rate, electromagnetic wave energy absorption ratio. When the human body is close to the antenna, the machine needs to perform power rollback to meet the SAR regulations in CE / FCC, and protect the safety of the human body. When there is no human body close to the antenna, the power is kept normal to improve the user experience. The SAR sensor chip can be arranged on the mainboard of the electronic device, and the detection signal can be transmitted from the mainboard to the feed part through the connecting line, and then fed to the second conductive area as the suspended metal from the feed part. The purpose of detecting the approach and departure of the human body is achieved, so as to control different power rollback and provide the user with the best performance experience.

[0046] In some optional embodiments, the conductive layer 30 can be provided with a plurality of first conductive connecting parts 33, and the conductive layer 30 is connected with the metal shell 10 through the first conductive connecting parts 33 to realize the electrical connection between the conductive layer 30 and the metal shell 10. The plurality of first conductive connecting parts 33 are arranged along the circumferential direction of the side of the conductive layer 30 which does not correspond to the opening 40. Optionally, the first conductive connecting part 33 can be gold-plated conductive foam, conductive silica gel, conductive cloth, etc. pasted on the conductive layer 30.

[0047] Referring to Figure 5 and Figure 6 , it is shown that Figure 5 is a back view schematic diagram of the bracket and the conductive layer according to an exemplary embodiment, that is, the side of the conductive layer facing the metal shell. Figure 6is a schematic view of the front side of the bracket and the conductive layer according to an exemplary embodiment, i.e. the side of the conductive layer facing away from the metal shell. In some alternative embodiments, the conductive member can further include a bracket 20, and the conductive layer 30 is wrapped around the bracket 20, and the conductive layer 30 is connected to the metal shell 10 through the first conductive area 37, so that the conductive layer 30 and the metal shell 10 enclose the cavity 41. Optionally, the bracket 20 can include a plastic bracket or a bracket made of other insulating material, which can support the conductive layer 30 and increase the stability of the conductive layer 30.

[0048] Further, the conductive layer 30 can include a main body part 31 and a bent part 32, the main body part 31 is wrapped around the bracket 20 and is formed with an annular hollow part 36, the bent part 32 is formed at at least part of the edge of the main body part 31 and is bent towards the metal shell 10, and the bent part 32 is connected to the metal shell 10. The main body part 31, the bracket 20, the bent part 32 and the metal shell 10 enclose the cavity 41, and the edge of the main body part 31 where the bent part 32 is not formed and the metal shell 10 form the opening 40. Optionally, the metal shell 10 can 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 part near the opening can be further bent to form a smaller bent part, so as to change and control the length and width of the opening, and the degree of bending can be set according to actual needs. In this embodiment, the annular hollow part 36 is square and is formed in the middle region of the conductive layer 30. It should be noted that the shape and size of the annular hollow part 36 can be adjusted according to actual needs, as long as the first conductive area 37 and the second conductive area 38 can be separated without conduction, the present disclosure does not limit this.

[0049] Optionally, the bracket 20 is rectangular, and the main body part 31 of the conductive layer 30 is rectangular, three edges of the main body part 31 are bent to form the bent part 32 and are connected to the metal shell 10, and the other edge is reserved as the opening, so as to realize the structure form that three edges of the conductive layer are connected to the metal shell and one edge is reserved as the opening, to form a completely sealed cavity, so as to improve the overall performance of the antenna cavity.

[0050] 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 10. 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.

[0051] Furthermore, the second bending section 322 is provided with a plurality of first conductive connectors 33 spaced apart along the length direction, and the first conductive connector 33 is connected to the metal shell 10, that is, the first conductive connector 33 is connected between the second bending section 322 and the metal shell 10, thereby realizing the electrical connection between the conductive layer 30 and the metal shell 10. The main body 31, the bracket 20, the first bending section 321, the second bending section 322, the first conductive connector 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 connector, 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 bending section 322 of the conductive layer 30. It can be understood that the conductive layer 30 and the metal shell 10 are in contact and connected through the first conductive connecting member 33, thereby achieving electrical connection between the conductive layer 30 and the metal shell 10, and forming a cavity 41 enclosed by the conductive layer 30, the first conductive connecting member 33 and the metal shell 10 in a small space.

[0052] Optionally, the bending portion 32 is arranged around the edges of the main portion 31 except the edge corresponding to the opening 40. The first conductive connectors 33 are arranged at intervals along the length direction of the bending portion 32, and the first conductive connectors 33 are connected with the metal shell 10, so as to realize the electrical connection between the conductive layer 30 and the metal shell 10. The main portion 31, the bracket 20, the bending portion 32, the first conductive connectors 33 and the metal shell 10 enclose the cavity 41. The first conductive connectors 33 can be one or multiple. When the first conductive connectors 33 are multiple, the multiple first conductive connectors 33 can be arranged at intervals around the edges of the main portion 31 of the conductive layer 30 except the edge corresponding to the opening 40, so as to surround the cavity antenna, and improve the performance of the antenna. When the first conductive connectors 33 are one, the first conductive connector 33 is annularly arranged around the edges of the main portion 31 of the conductive layer 30 except the edge corresponding to the opening 40. For example, the bracket 20 is rectangular, the main portion 31 of the conductive layer 30 is rectangular, the edges of three sides of the main portion 31 are bent to form the bending portion 32 and are connected with the metal shell 10, and the edge of the other side is provided with the opening. The bending portion 32 is arranged around the edges of the main portion 31 except the edge corresponding to the opening 40. The first conductive connector 33 is annularly connected between the bending portion 32 and the metal shell 10, so as to improve the sealing performance and the reliability and stability of the electrical connection.

[0053] In some optional embodiments, the bracket 20 comprises a first surface and a second surface opposite to the first surface, the main portion 31 is wrapped around the first surface, and the bending portion 32 extends from one side of the first surface to one side of the second surface and at least partially protrudes from the second surface. It can be understood that the first surface is away from the metal shell, the second surface is close to the metal shell, the conductive layer 30 is wrapped around the side of the bracket 20 away from the metal shell 10, and the bending portion 32 wraps the bracket 20 in the middle after being bent from the main portion 31, so as to improve the stability of the bracket and the conductive layer.

[0054] In some optional embodiments, the metal shell 10 comprises a bottom wall 11 and a side wall 12 connected with the bottom wall 11, and the cavity 41 formed by the conductive layer 30 and the metal shell 10 can be arranged in the area of the bottom wall 11 away from 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 10 can also be arranged in the 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 cases can be included:

[0055] (1) The main body 31 can be rectangular, and three side edges of the main body 31 are sequentially formed with a first bending portion, a second bending portion, and a third bending portion, and the first bending portion, the second bending portion, and the third bending portion are all connected with the metal shell 10. The main body 31, the first bending portion, the second bending portion, the third bending portion, and the metal shell 10 enclose to form the cavity 41. It can be understood that the first bending portion, the second bending portion, and the third bending portion are all connected with the bottom wall 11. The main body 31, the first bending portion, the second bending portion, the third bending portion, and the bottom wall 11 enclose to form the cavity 41. That is, the cavity 41 is arranged in the area of the bottom wall 11 not close to the side wall 12. The three side edges of the main body 31 are formed with the bending portions connected with the bottom wall 11, and the cavity structure formed by the three side conductive layers cooperating with one side of the shell is formed.

[0056] (2) The main body 31 can be rectangular, and a first side edge of the main body 31 is formed with a first bending portion, and a second side edge adjacent to the first side of the main body 31 is formed with a second bending portion, and the first bending portion and the second bending portion are all connected with the bottom wall 11, and a third side adjacent to the second side of the main body 31 is connected with the side wall 12. The main body 31, the first bending portion, the second bending portion, the side wall 12, and the bottom wall 11 enclose to form the cavity 41. That is, the cavity 41 is arranged in the corner area of the bottom wall 11 close to the side wall 12. The two side edges of the main body 31 are formed with the bending portions connected with the bottom wall 11, and the cavity structure formed by the two side conductive layers cooperating with two sides of the shell is formed.

[0057] (3) The main body 31 can be rectangular, and a first side edge of the main body 31 is formed with a first bending portion, and a second side edge opposite to the first side of the main body 31 is formed with a second bending portion, and the first bending portion and the second bending portion are all connected with the metal shell 10. The main body 31, the first bending portion, the second bending portion, and the metal shell 10 enclose to form the cavity 41. It can be understood that the first bending portion and the second bending portion are all connected with the bottom wall 11. The main body 31, the first bending portion, the second bending portion, and the bottom wall 11 enclose to form the cavity 41. That is, the cavity 41 is arranged in the area of the bottom wall 11 not close to the side wall 12. The two side edges of the main body 31 are formed with the bending portions connected with the bottom wall 11, and the cavity structure formed by the two side conductive layers cooperating with one side of the shell is formed.

[0058] (4) The main body 31 can be rectangular, and a first side edge of the main body 31 is formed with a first bending portion connected with the bottom wall 11, and a second side opposite to the first side of the main body 31 is connected with the side wall 12. The main body 31, the first bending portion, the side wall 12 and the bottom wall 11 enclose the cavity 41. That is, the cavity 41 is arranged at a corner region of the bottom wall 11 close to the side wall 12. One edge of the main body 31 is formed with a bending portion connected with the bottom wall 11, and a cavity structure is formed by the one conductive layer cooperating with the two shells.

[0059] In combination with Figure 1 , Figure 3 and Figure 5 , in some optional embodiments, the antenna can further include a feeding member 42 arranged at the opening 40. The feeding member 42 is electrically connected with the second conductive area 38, and the second conductive area 38 is externally fed through the feeding member 42. In this way, the second conductive area 38 separated from the conductive layer 30 by the annular hollow portion 36 can form a suspended metal, and is electrically connected with the SAR sensor chip through the feeding member 42, and is used as a SAR detection body of the electronic device, thereby meeting the SAR detection requirement.

[0060] The support 20 is provided with a notch portion 21 corresponding to the opening 40, and the feeding member 42 is arranged at the notch portion 21. It can be understood that the edge of the main body 31 without the bending portion 32, that is, the edge of the main body 31 corresponding to the opening 40 is provided with the feeding member 42, and the feeding member 42 can be used as a feeding point of the antenna. Alternatively, the size of the notch portion 21 can be 3*5 mm, and the feeding member 42 can be a circuit board. Further, the feeding member 42 can be provided with a third conductive connecting member 43 electrically connected with the second conductive area 38, so as to realize the electrical connection between the feeding member 42 and the second conductive area 38 as a suspended metal. Alternatively, the third conductive connecting member 43 can be a metal spring. The feeding member 42 can also be connected with the metal shell 10, so as to be used as a feeding point of the antenna and support the conductive layer 30 at the same time, thereby increasing the stability of the conductive layer 30.

[0061] In combination with Figure 5 and Figure 6 , in some optional embodiments, the support 20 is provided with at least one connecting hole 22 in the circumferential direction, and the antenna further includes a fastener (not shown) penetrating through the connecting hole 22 and connected with the metal shell 10, so as to fixedly connect the support 20 with the metal shell 10, and ensure the stability of the electrical connection between the conductive layer 30 and the metal shell 10. Alternatively, the connecting hole 22 is arranged away from the conductive layer 30 by about 1 mm. The connecting hole 22 can be a threaded hole, and the fastener can be a screw. Four connecting holes 22 are taken as an example in the figure.

[0062] In combination with Figure 1 andFigure 6 As shown, Figure 3 The area 100 in the figure is the antenna area. In some optional embodiments, a second conductive connector 39 is provided on the side of the conductive layer 30 away from the metal housing 10. The second conductive connector 39 is provided corresponding to the opening 40. Optionally, the second conductive connector 39 can be provided on the same side as the feeder 42, and within 3 mm of the edge and the feeder 42, thereby being close to the feed point and achieving a shorter conductive path.

[0063] When the antenna is used in an electronic device with a display screen, the second conductive connector 39 can be used to connect to the display screen and serve as a grounding device, thereby reducing clutter, reducing interference with the display screen, and improving antenna efficiency. Optionally, the second conductive connector 39 and the feeder 42 are arranged overlapping along the thickness direction of the conductive layer 30, so that the grounding point is located close to the feed point, forming the shortest conductive path. The second conductive connector 39 can be conductive foam, conductive silicone, conductive cloth, etc., adhered to the conductive layer 30. The number of second conductive connectors 39 can be one or more, and the arrangement is based on the antenna performance requirements.

[0064] 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 shielding cover increases, the resonant frequency changes from high to low. 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 secondly adjusting the width of the main body of the bracket and the conductive layer. In the above manner, the resonant frequency of the antenna can be achieved from 0.5G to 10G.

[0065] See also Figure 7 、 Figure 8 and Figure 9 As shown, Figure 7 and Figure 8 FIG2 shows the radiation efficiency and total efficiency of the antenna disclosed in the present invention obtained through simulation. Figure 9 The figure shows the current distribution diagram of the antenna disclosed herein, taking a 5G antenna as an example. It can be seen that the antenna has high radiation efficiency and overall efficiency, with more current flowing on the plane, achieving good antenna performance. This means that the solution of providing a circular hollowing-out portion on the conductive layer to form a suspended metal has little impact on the antenna's performance. Under the premise of maintaining performance, the solution of using the suspended metal area as the SAR sensor detector is feasible. Furthermore, while ensuring performance, the antenna disclosed herein uses materials such as metal shrapnel and conductive foam, which reduces material costs compared to the bracket cavity mold, spot-welded shrapnel, and foam materials used in related technologies.

[0066] Referring to Figures 10 to 13 shown, Figure 10 shown is a mode analysis diagram of the antenna of the present disclosure. Figures 11 to 13 shown are current distribution diagrams in the cases of resonant frequencies of 2, 3, and 4, respectively. The initial size of the cavity is 23*14mm, the mode analysis F is the antenna feed point, and the cavity is in a bias-fed state. ABCD are the four corners of the cavity. Among them, A to F form the first resonant frequency of the antenna, and the resonant frequency is 1. The cavity inside ABCD will form a high-order mode, and the resonant frequency of the multiple zero points is 2. BF will form a third resonant frequency of 3. AB will form a fourth resonant frequency of 4. In the bias-fed case, the frequency correspondence is. The resonant frequency 1> resonant frequency 3> resonant frequency 4. Among them, the resonant frequency 2 is the high-order mode frequency, and the size of the frequency needs to be determined by referring to the size of the entire cavity mode (that is, the cavity).

[0067] Referring to Figure 1 shown, the present disclosure also provides an electronic device, which can be, for example, a mobile phone, a tablet computer, a notebook computer, a wearable device, a smart bracelet, a smart watch, smart glasses, or the like. 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 manners is also applicable to the electronic device of the present embodiment. The display screen 90 is assembled to the metal shell 10 and connected with the conductive layer 30 of the antenna. Optionally, the display screen 90 and the conductive layer 30 can be connected through the second conductive connecting piece 39, and the second conductive connecting piece 39 plays a grounding role, thereby reducing clutter and reducing interference to the display screen, and improving the efficiency of the antenna.

[0068] As can be seen from the above embodiments, the electronic device of the present disclosure adopts the above-mentioned antenna, and the conductive layer 30 wrapped in the support 20 and the metal shell 10 enclose a cavity 41 with an opening 40, thereby constituting a cavity 41 antenna with an opening 40, which can reduce the risk of uncertain electrical connection, and can perfectly maintain the sealing of the cavity 41, thereby increasing the performance of the entire antenna cavity 41, improving the performance of the antenna, reducing the cost and the risk of mass production. Moreover, the structure of the conductive layer can increase the flexibility of the antenna performance debugging in the research and development stage, and reduce the proofing cycle. At the same time, the second conductive area 38 separated by the annular hollow part 36 on the conductive layer 30 can form a suspended metal as a SAR sensor detection body of the electronic device, which meets the SAR detection requirement, and does not affect the antenna radiation performance, does not change the product appearance, and does not increase the cost. When the user's body is close to the antenna, the application scenario is triggered, and the electronic device reduces the power to meet the SAR regulations in CE / FCC. When the human body is not detected close, the power of the electronic device is maintained in a normal state to improve the user experience.

[0069] In some optional embodiments, the electronic device can further comprise a mainboard, which is provided with a SAR sensor chip and is electrically connected with the second conductive area 38 of the antenna to realize the SAR detection function. Optionally, the feeding member 42 can be provided with a third conductive connecting member 43, which is electrically connected with the mainboard through a connecting line 44. Optionally, the connecting line 44 can be a FPC flexible circuit board. In this way, the detection signal can be transmitted from the mainboard to the feeding member through the connecting line, and then fed from the feeding member to the second conductive area as a suspended metal. The purpose of detecting the approach and departure of the human body is achieved, so as to control different power backoff and provide the user with the optimal performance experience.

[0070] Other embodiments of the present disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the features disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure following, in general, the principles of the present disclosure and including such features to the extent that they are not disclosed in the prior art. The specification and examples are to be regarded as illustrative only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0071] It should be understood that the present disclosure is not limited to the precise structures herein described and illustrated in the drawings, and that various modifications and changes can be made without departing from its scope. The scope of the present disclosure is limited only by the claims that follow.

Claims

1. An antenna, characterized by The application relates to a metal shell and a conductive part; the conductive part is provided with a conductive layer, and the conductive part is connected with the metal shell and encloses the metal shell to form a cavity with an opening. The conductive layer is formed with an annular hollow part, the annular hollow part separates the conductive layer into a first conductive area outside the annular hollow part and a second conductive area inside the annular hollow part, the second conductive area is used for electrically connecting with a SAR sensor chip, and the first conductive area is connected with the metal shell. The conductive part comprises a support, and the conductive layer is wrapped around the support.

2. The antenna according to claim 1, characterized in that, The conductive layer comprises a main body part and a bending part, the main body part is wrapped around the support and is formed with the annular hollow part, the bending part is formed at at least part of the edge of the main body part and is bent towards the metal shell, and the bending part is connected with the metal shell.

3. The antenna according to claim 2, characterized in that, The main body part, the support, the bending part and the metal shell enclose the cavity, and the edge of the main body part, which is not formed with the bending part, and the metal shell form the opening. The bending part comprises a first bending section and a second bending section, the first bending section is bent from the main body part in a first direction, the second bending section is bent from the first bending section in a second direction, and the second bending section is connected with the metal shell.

4. The antenna according to claim 3, characterized in that, The second bending section is provided with a plurality of first conductive connecting parts in the length direction, and the first conductive connecting parts are connected with the metal shell.

5. The antenna according to claim 4, characterized in that, The bending part surrounds other edges of the main body part except the edge corresponding to the opening, and the bending part is provided with a plurality of first conductive connecting parts in the length direction, and the first conductive connecting parts are connected with the metal shell.

6. The antenna according to claim 3, wherein, The support comprises a first surface and a second surface opposite to the first surface, the main body part is wrapped around the first surface, and the bending part extends from one side of the first surface to one side of the second surface and at least partially protrudes from the second surface.

7. The antenna according to claim 3, wherein, The main body part is rectangular, three side edges of the main body part are sequentially formed with a first bending part, a second bending part and a third bending part, the first bending part, the second bending part and the third bending part are all connected with the metal shell, the main body part, the first bending part, the second bending part, the third bending part and the metal shell enclose the cavity, or 8. The antenna according to claim 3, wherein, The metal shell comprises a bottom wall and a side wall connected with the bottom wall, the main body part is rectangular, a first side edge of the main body part is formed with a first bending part, a second side edge adjacent to the first side of the main body part is formed with a second bending part, the first bending part and the second bending part are both connected with the bottom wall, a third side adjacent to the second side of the main body part is connected with the side wall, the main body part, the first bending part, the second bending part, the side wall and the bottom wall enclose the cavity, or The metal shell comprises a bottom wall and a side wall connected with the bottom wall, the main body part is rectangular, a first side edge of the main body part is formed with a first bending part, a second side edge adjacent to the first side of the main body part is formed with a second bending part, the first bending part and the second bending part are both connected with the bottom wall, a third side adjacent to the second side of the main body part is connected with the side wall, the main body part, the first bending part, the second bending part, the side wall and the bottom wall enclose the cavity, or The main body part is rectangular, a first side edge of the main body part is formed with a first bending part, a second side edge opposite to the first side of the main body part is formed with a second bending part, and the first bending part and the second bending part are connected with the metal shell; the main body part, the first bending part, the second bending part and the metal shell enclose the cavity; or The metal shell comprises a bottom wall and a side wall connected with the bottom wall; the main body part is rectangular, a first side edge of the main body part is formed with a first bending part, the first bending part is connected with the bottom wall, and a second side opposite to the first side of the main body part is connected with the side wall; the main body part, the first bending part, the side wall and the bottom wall enclose the cavity.

9. The antenna according to claim 1, wherein, A feeding part is further included and arranged at the opening; the feeding part is electrically connected with the second conductive area, and the second conductive area feeds electricity outward through the feeding part.

10. The antenna according to claim 9, characterized in that, The conductive part is provided with a notch part corresponding to the opening, and the feeding part is arranged at the notch part.

11. The antenna according to claim 9, wherein, The feeding part is provided with a third conductive connecting part, and the third conductive connecting part is electrically connected with the second conductive area.

12. The antenna according to claim 1, wherein, The conductive layer is provided with a plurality of first conductive connecting parts, and the first conductive connecting parts are connected with the metal shell; the plurality of first conductive connecting parts are arranged at intervals along the circumferential direction of the side edge of the conductive layer which does not correspond to the opening.

13. The antenna according to claim 1, wherein, The conductive layer is provided with a second conductive connecting part on the side away from the metal shell.

14. The antenna according to claim 1, wherein, The annular hollow part is square and formed in the middle region of the conductive layer.

15. An electronic device, comprising: A display screen is further included and assembled with the metal shell and connected with the conductive layer.

16. The electronic device of claim 15, wherein, A mainboard is further included and provided with a SAR sensor chip and electrically connected with the second conductive area of the antenna.

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