Electronic device

Abstract

The utility model provides an electronic device. The electronic equipment comprises a mainboard, a middle frame and an antenna module. The main board comprises a first feed connection position, a second feed connection position and a grounding connection position, and the first feed connection position and the second feed connection position are located on the two sides of the grounding connection position. The middle frame comprises a metal base frame, a structure main body arranged on the metal base frame and a metal frame connected with the metal base frame, and the main board is conductively connected with the metal base frame. The antenna module comprises a first radiator in conductive connection with the first feed connection position, a second radiator in conductive connection with the second feed connection position, and a circuit board in conductive connection with the grounding connection position. The circuit board is arranged on the structure body. According to the antenna module, the circuit board can return the floor current generated by the first radiator and the second radiator which transmit the same type of antenna signals to the ground through the circuit board which is conductively connected with the grounding connection position, so that the current influence between the first radiator and the second radiator is avoided, and the antenna performance of the antenna module is further improved.

Description

Technical Field

[0001] The present disclosure relates to the field of electronic technology, and in particular to electronic equipment. Background Art

[0002] For example, electronic devices such as mobile phones and tablets usually contain multiple antenna radiators, which help improve the efficiency and reliability of communication systems without increasing the transmission power.

[0003] However, in an antenna module using a metal frame of an electronic device as a radiator, radiators with the same or similar radiation frequencies may experience current mutual interference due to the eigenmode of the antenna floor during use, which affects the working performance of the antenna module. Utility Model Content

[0004] The present disclosure provides an electronic device to solve the related technical problems.

[0005] According to an embodiment of the present disclosure, an electronic device is provided, including:

[0006] A main board, comprising a first feed connection position, a second feed connection position and a ground connection position, wherein the first feed connection position and the second feed connection position are located on both sides of the ground connection position;

[0007] The middle frame comprises a metal base frame, a structural body arranged on the metal base frame and a metal frame connected to the metal base frame; the main board is conductively connected to the metal base frame;

[0008] An antenna module includes a first radiator conductively connected to the first feed connection position, a second radiator conductively connected to the second feed connection position, and a circuit board conductively connected to the ground connection position; the first radiator and the second radiator are formed on the metal frame and are used to propagate the same type of antenna signals; the circuit board is arranged on the structural body.

[0009] Optionally, the first radiator includes a first end close to the second radiator, and the second radiator includes a second end close to the first radiator;

[0010] The antenna module further includes a third radiator disposed between the first end and the second end, and the third radiator and the first radiator transmit antenna signals of different types.

[0011] Optionally, the characteristic length of the circuit board is associated with a dielectric wavelength of an operating frequency of the third radiator in the structural body.

[0012] Optionally, the circuit board is provided with at least one positioning hole.

[0013] Optionally, the circuit board includes a main body and at least one bending portion connected to the main body, the bending portion encloses a space opening toward the main board; and a grounding structure is provided at an end of the bending portion away from the main body.

[0014] Optionally, the first feeding connection position, the second feeding connection position and the grounding connection position are arranged at an edge of the main board close to the metal frame; the main board is arranged on one side of the structural body, the main body is arranged on the other side of the structural body, and the bending portion is in contact with the edge structure of the structural body.

[0015] Optionally, the main body includes a first part, a second part and a third part; the first part is connected to the bending part, and the second part and the third part extend from the first part in different directions respectively.

[0016] Optionally, the circuit board includes at least one arc-shaped edge.

[0017] Optionally, the circuit board includes a flexible circuit board.

[0018] Optionally, the first radiator and the second radiator are radiators of a MIMO antenna.

[0019] The technical solution provided by the present disclosure can at least achieve the following beneficial effects:

[0020] In the present disclosure, a circuit board is arranged on the structural body of the middle frame, and the circuit board is conductively connected to the ground connection position on the main board. The first feed connection position and the second feed connection position on the main board are located on both sides of the ground connection position. Therefore, the floor current generated by the first radiator and the second radiator that transmit the same type of antenna signals on the metal base of the middle frame can be returned to the ground through the circuit board conductively connected to the ground connection position, thereby avoiding the current influence between the first radiator and the second radiator, thereby improving the antenna performance of the antenna module.

[0021] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the specification and, together with the description, serve to explain the principles of the specification.

[0023] Figure 1 is a partial three-dimensional structural diagram of an electronic device in an exemplary embodiment of the present disclosure;

[0024] Figure 2 is a partial front view structural diagram of an electronic device in an exemplary embodiment of the present disclosure;

[0025] Figure 3 is a partial front view structural diagram of an electronic device in another exemplary embodiment of the present disclosure;

[0026] Figure 4 It is a structural schematic diagram of a circuit board in an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0027] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this specification. Instead, they are merely examples of devices and methods consistent with some aspects of this specification as detailed in the appended claims.

[0028] The terms used in this disclosure are only for the purpose of describing specific embodiments and are not intended to limit the disclosure. Unless otherwise defined, the technical terms or scientific terms used in this specification should be understood by people with ordinary skills in the field to which the disclosure belongs. The words "first", "second" and similar words used in this specification and claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantitative limit, but indicate the existence of one. "Multiple" or "several" means two and more than two. Unless otherwise specified, words such as "front", "rear", "lower" and / or "upper" are only for the convenience of explanation and are not limited to one position or one spatial orientation. Words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, and can include electrical connections, whether direct or indirect.

[0029] The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the present disclosure. The singular forms of "a", "the" and "the" used in this specification and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0030] For example, electronic devices such as mobile phones and tablets usually contain multiple antenna radiators, which help improve the efficiency and reliability of communication systems without increasing the transmission power. However, in antenna modules that use the metal frame of electronic devices as radiators, radiators with the same or similar radiation frequencies have current mutual interference caused by the eigenmode of the antenna floor during use, which affects the working performance of the antenna module.

[0031] The present disclosure provides an electronic device, Figure 1 is a partial three-dimensional structural diagram of an electronic device in an exemplary embodiment of the present disclosure, Figure 2 is a partial front view structural diagram of an electronic device in an exemplary embodiment of the present disclosure, such as Figure 1 , Figure 2 As shown, the electronic device 1 includes a mainboard 11, a middle frame 12 and an antenna module 13. The mainboard 11 includes a first feed connection position 112, a second feed connection position 113 and a ground connection position 111, and the first feed connection position 112 and the second feed connection position 113 are located on both sides of the ground connection position 111. The middle frame 12 includes a metal base 122, a structural body 121 arranged on the metal base 122 and a metal frame 123 connected to the metal base 122, and the mainboard 11 is conductively connected to the metal base 122. The antenna module 13 includes a first radiator 131 conductively connected to the first feed connection position 112, a second radiator 132 conductively connected to the second feed connection position 113 and a circuit board 134 conductively connected to the ground connection position 111, the first radiator 131 and the second radiator 132 are formed on the metal frame 123, and are used to propagate the same type of antenna signals, and the circuit board 134 is arranged on the structural body 121.

[0032] The electronic device 1 is provided with a circuit board 134 on the structural body 121 of the middle frame 12. The circuit board 134 is conductively connected to the ground connection position 111 on the main board 11. The first feed connection position 112 and the second feed connection position 113 on the main board 11 are located on both sides of the ground connection position 111. Figure 3 The first radiator 131 and the second radiator 132 that transmit the same type of antenna signal generate the floor current on the metal base frame 122 of the middle frame 12 back to the ground through the circuit board 134 conductively connected to the ground connection position 111, avoiding the current influence between the first radiator 131 and the second radiator 132, thereby improving the antenna performance of the antenna module 13. Figure 3 The dashed arrow may represent the flow direction of the floor current formed by the first radiator 131 on the metal base 122 , and the dashed arrow may represent the flow direction of the floor current formed by the second radiator 132 on the metal base 122 .

[0033] It should be noted that the first radiator 131 and the second radiator 132 can be used to propagate the same type of antenna signals, and the radiation frequencies of the first radiator 131 and the second radiator 132 can be the same or similar. For example, the first radiator 131 and the second radiator 132 can be two radiators of a MIMO (Multiple-Input Multiple-Output) antenna, and the antenna signals propagated by the first radiator 131 and the second radiator 132 are the same. Alternatively, the first radiator 131 and the second radiator 132 can be used to propagate GPS signals, the first radiator 131 can be used to propagate L1 antenna signals, and the second radiator 132 can be used to propagate L5 antenna signals. In other embodiments, the first radiator 131 and the second radiator 132 can also be other types of antenna radiators with similar radiation frequencies, and the present disclosure is not limited to this.

[0034] In the above embodiment, the first radiator 131 can be a section of the metal frame 123, and the second radiator 132 can be another section of the metal frame 123. When the mainboard 11 feeds power to the first radiator 131 and the second radiator 132, the first radiator 131 and the second radiator 132 will form a floor current on the metal base 122 of the middle frame 12. The circuit board 134 arranged in the structural body 121 of the middle frame 12 can make at least a part of the floor current flowing from the first radiator 131 to the second radiator 132 and at least a part of the floor current flowing from the second radiator 132 to the first radiator 131 flow back to the mainboard 11 through the grounding structure 1343, thereby avoiding the interference of the floor current in the metal base 122 on the first radiator 131 and the second radiator 132.

[0035] Among them, according to specific layout requirements, the relative positions of the first feed connection point 112, the second feed connection point 113 and the ground connection point 111 can be changed accordingly, but the first feed connection point 112 and the second feed connection point 113 are located on both sides of the ground connection point 111, so as to use the circuit board 134 to change the direction of the floor current so that the floor current returns to the ground through the grounding structure 1343.

[0036] For example, when the first feed connection point 112, the second feed connection point 113 and the ground connection point 111 are located at the edge of the main board 11, the first feed connection point 112 and the second feed connection point 113 being located on both sides of the ground connection point 111 may refer to the first feed connection point 112 and the second feed connection point 113 being located on both sides of the ground connection portion in the extension direction of the edge of the main board 11. Alternatively, the first feed connection point 112 and the second feed connection point 113 being located on both sides of the ground connection point 111 may also refer to the first feed connection point 112 and the second feed connection point 113 being located on both sides of the ground connection point 111 in a direction parallel to the connection line of the first feed connection point 112 and the second feed connection point 113, or the first feed connection point 112 and the second feed connection point 113 being located on both sides of the ground connection point 111 in other directions that are inclined at a certain range of angles to the connection line of the first feed connection point 112 and the second feed connection point 113, and the present disclosure is not limited thereto.

[0037] In one embodiment, the distance from the ground connection point 111 to the first feeding connection point 112 and the distance from the ground connection point 111 to the second feeding connection point 113 may be equal to take into account the performance of both the first radiator 131 and the second radiator 132 .

[0038] In some embodiments, the circuit board 134 includes a main body 1341 and at least one bent portion 1342 connected to the main body 1341, the bent portion 1342 encloses a space with an opening toward the main board 11, and a grounding structure 1343 is provided at the end of the bent portion 1342 away from the main body 1341. The bent portion 1342 bent relative to the main body 1341 is used to make the grounding structure 1343 close to the grounding connection portion on the main board 11, which helps to flexibly set the circuit board 134. In addition, the space formed by the bent portion 1342 can form a clearance between the circuit board 134 and the main board 11, which helps to improve the antenna performance.

[0039] Among them, the first feed connection position 112, the second feed connection position 113 and the ground connection position 111 can be set at the edge of the main board 11 close to the metal frame 123, the main board 11 is set on one side of the structural body 121, the main body 1341 is set on the other side of the structural body 121, and the bending portion 1342 is in contact with the edge structure of the structural body 121. The distribution of the main body 1341 and the main board 11 as well as the first feed connection position 112, the second feed connection position 113 and the ground connection position 111 can optimize the spatial layout and reduce the excessive occupation of the internal space of the electronic device 1 by the circuit board 134 and its grounding structure 1343. In addition, setting the first feeding connection point 112, the second feeding connection point 113 and the grounding connection point 111 at the edge of the mainboard 11 close to the metal frame 123 can facilitate the connection between the first feeding connection point 112 and the feeding point of the first radiator 131, the second feeding connection point 113 and the feeding point of the second radiator 132, and the grounding structure 1343 and the grounding connection point 111.

[0040] In other embodiments, the first feeding connection point 112 , the second feeding connection point 113 and the ground connection point 111 may also be disposed at other positions of the mainboard 11 , and the present disclosure is not limited thereto.

[0041] It should be noted that the grounding structure 1343 may include a connecting spring to enable the circuit board 134 to be conductively connected to the mainboard 11 through the connecting spring. Alternatively, the grounding structure 1343 may also be conductively connected to the mainboard 11 by welding, clamping, etc., which is not limited in the present disclosure.

[0042] The main body 1341 of the circuit board 134 can be provided with a grounding line, a metal structure or electronic components to block and shunt the floor current on the metal base 122 of the middle frame 12, thereby avoiding mutual interference caused by the floor current of the first radiator 131 and the second radiator 132. The structure of the main body 1341 can be selected according to the specific antenna requirements and the installation space:

[0043] In some embodiments, the main body 1341 may be a block or strip structure with straight or curved edges as a whole, so as to guide the floor current to the grounding structure 1343 of the bent portion 1342 through the extension of its own structure.

[0044] In other embodiments, the main body 1341 may include a first portion, a second portion, and a third portion, wherein the first portion is connected to the bending portion 1342, and the second portion and the third portion extend from the first portion in different directions. The second portion and the third portion extending in different directions can block and reflux the floor current of the first radiator 131 and the floor current of the second radiator 132, respectively, thereby further reducing the interference of the current on the first radiator 131 and the second radiator 132. For example, the first portion may be a block structure connected to the bending portion 1342, the second portion may be a strip structure extending toward the side close to the first radiator 131, and the third portion may be a strip structure extending toward the side close to the second radiator 132, so as to realize the reflux of the floor current for the first radiator 131 and the second radiator 132, respectively.

[0045] In some other embodiments, the main body 1341 may include only the second part and the third part, and the bending part 1342 is connected to the second part and the third part respectively, so that the floor current can flow back directly through the grounding structure 1343 of the bending part 1342 via the second part and the third part.

[0046] In other embodiments, the electronic device 1 may include two independent circuit boards 134, the ground connection position 111 of the mainboard 11 may include two grounding points, and the circuit board 134 is respectively conductively connected to the two grounding points on the mainboard 11, so that the ground current is respectively returned through the two independent circuit boards 134. The specific structural arrangement of the circuit board 134 can refer to the above embodiment, and will not be repeated here.

[0047] In the embodiment of the present disclosure, the main body 1341 is disposed on the structural body 121 of the middle frame 12, wherein the material of the structural body 121 may be plastic, carbon fiber, or the like, so that the structural body 121 cooperates with the metal base 122 to obtain properties such as reduced interference and reduced weight while ensuring the strength of the middle frame 12. When the material of the structural body 121 is plastic, the middle frame 12 may be formed by in-mold injection molding to simplify the molding process.

[0048] In some embodiments, the circuit board 134 is provided with at least one positioning hole 1344 , and the structural body 121 may be provided with a positioning protrusion arranged in alignment with the positioning hole 1344 of the circuit board 134 , and the positioning hole 1344 is sleeved on the positioning protrusion to achieve positioning and assembly of the circuit board 134 .

[0049] In some embodiments, the circuit board 134 includes at least one arc-shaped edge to facilitate avoiding the structure of the central frame 12 or other structures of the electronic device 1 , while improving the structural strength and installation reliability of the circuit board 134 .

[0050] In the above embodiment, the circuit board 134 is a FPC (Flexible Printed Circuit) to utilize its own flexibility to reduce the difficulty of installation and improve the convenience of connection with the main board 11. Alternatively, the circuit board 134 may also be a PCB board or LDS (Laser-Direct-structuring), which is not limited in the present disclosure.

[0051] In some embodiments, the first radiator 131 includes a first end close to the second radiator 132, the second radiator 132 includes a second end close to the first radiator 131, and the antenna module 13 further includes a third radiator 133 disposed between the first end and the second end, and the third radiator 133 and the first radiator 131 transmit antenna signals of different types. Since the third radiator 133 is disposed between the first end and the second end, close to the circuit board 134, the provision of the circuit board 134 can also be used to improve the antenna bandwidth and performance of the third radiator 133, which has antenna signals of different types from those of the first radiator 131 and the second radiator 132.

[0052] In the above embodiment, the characteristic length of the circuit board 134 may be an effective length that can reflect the circuit board 134 when used as an auxiliary antenna. For example, the characteristic length may be Figure 4 The circumscribed circle diameter D of the main body 1341 of the circuit board 134 shown can also be the longest length between any two points on the circuit board 134, and the characteristic length can also be determined according to the shape of the circuit board 134. For example, when the circuit board 134 is rectangular, the characteristic length can refer to the length of the long side of the rectangle, and when the circuit board 134 is circular, the characteristic length can refer to the diameter of the circle. The characteristic length can be associated with the dielectric wavelength of the operating frequency of the third radiator 133 in the structural body 121, so as to utilize the circuit board 134 to improve the performance of the third radiator 133. At this time, the circuit board 134 can improve the performance of the third radiator 133 as an auxiliary antenna, and the circumscribed circle diameter of the main body 1341 can be equivalent to the antenna length of the auxiliary antenna. For example, the operating frequency of the third radiator 133 is f 0 The length of the circuit board 134 as an auxiliary antenna can be determined by the operating frequency f of the third radiator 133. 0 and the dielectric constant ε of the structural body 121 γ Determine the wavelength λ of the third radiator 133 operating in the medium of the structural main body 121 ε As shown in the following formula:

[0053]

[0054] The diameter of the circumscribed circle of the main body 1341 may be less than or equal to the wavelength λ of the third radiator 133 operating in the medium of the structural main body 121.ε For example, the diameter of the circumscribed circle of the main body 1341 may be the wavelength λ of the third radiator 133 in the medium of the structural main body 121. ε 1 / 4 of.

[0055] In addition, the antenna module 13 may include multiple radiators of the same type of antenna signals radiated by the first radiator 131 and the second radiator 132. Any two radiators can generate ground return currents that interfere with each other by setting a circuit board 134. The present disclosure does not limit the number and setting positions of the radiators and the number and setting positions of the circuit boards 134.

[0056] It should be noted that the electronic device 1 may be a mobile phone, a tablet computer, a vehicle-mounted terminal, a medical terminal, a wearable device, etc., and the present disclosure does not limit this.

[0057] The above is only a preferred embodiment of the present disclosure and does not limit the present disclosure in any form. Although the present disclosure has been disclosed as a preferred embodiment as above, it is not used to limit the present disclosure. Any technician familiar with this profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present disclosure. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present disclosure without departing from the content of the technical solution of the present disclosure are still within the scope of the technical solution of the present disclosure.

Claims

1. An electronic device, characterized in that: include: A main board, comprising a first feed connection position, a second feed connection position and a ground connection position, wherein the first feed connection position and the second feed connection position are located on both sides of the ground connection position; The middle frame comprises a metal base frame, a structural body arranged on the metal base frame and a metal frame connected to the metal base frame; the main board is conductively connected to the metal base frame; An antenna module includes a first radiator conductively connected to the first feed connection position, a second radiator conductively connected to the second feed connection position, and a circuit board conductively connected to the ground connection position; the first radiator and the second radiator are formed on the metal frame and are used to propagate the same type of antenna signals; the circuit board is arranged on the structural body.

2. The electronic device according to claim 1, characterized in that: The first radiator includes a first end close to the second radiator, and the second radiator includes a second end close to the first radiator; The antenna module further includes a third radiator disposed between the first end and the second end, and the third radiator and the first radiator transmit antenna signals of different types.

3. The electronic device according to claim 2, characterized in that: The characteristic length of the circuit board is associated with a dielectric wavelength in the structural body at an operating frequency of the third radiator.

4. The electronic device according to claim 1, characterized in that: The circuit board is provided with at least one positioning hole.

5. The electronic device according to claim 1, characterized in that: The circuit board comprises a main body and at least one bending portion connected to the main body, wherein the bending portion encloses a space opening toward the main board; and a grounding structure is provided at an end of the bending portion away from the main body.

6. The electronic device according to claim 5, characterized in that: The first feed connection position, the second feed connection position and the ground connection position are arranged at the edge of the main board close to the metal frame; the main board is arranged on one side of the structural body, the main body is arranged on the other side of the structural body, and the bending portion is in contact with the edge structure of the structural body.

7. The electronic device according to claim 5, characterized in that: The main body includes a first part, a second part and a third part; the first part is connected to the bending part, and the second part and the third part extend from the first part toward different directions respectively.

8. The electronic device according to claim 1, characterized in that: The circuit board includes at least one arc-shaped edge.

9. The electronic device according to claim 1, characterized in that: The circuit board includes a flexible circuit board.

10. The electronic device according to claim 1, characterized in that: The first radiator and the second radiator are radiators of a MIMO antenna.

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