Electronic device

Abstract

The utility model provides electronic equipment, and belongs to the technical field of antennas. The electronic equipment comprises a main board and an antenna, the main board comprises a first circuit board, an intermediate board and a second circuit board, the first circuit board, the intermediate board and the second circuit board are sequentially arranged in a stacked mode, the first circuit board is provided with a feed interface, the feed interface is used for being electrically connected with a radio frequency element of the electronic equipment, and the second circuit board is used for being electrically connected with the radio frequency element of the electronic equipment. The first circuit board and the second circuit board are electrically connected through the intermediate board; the antenna is fixed on the first side wall of the medium plate and is electrically connected with the feed interface. By adopting the electronic equipment, the antennas are arranged on the side wall of the intermediate plate in the sandwich type mainboard, so that the antennas with different frequency bands can be prevented from being stacked at the position of the middle frame of the electronic equipment, the arrangement positions of the antennas with different frequency bands are relatively dispersed, and the mutual influence between the antennas can be weakened.

Description

Technical Field

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

[0002] With the rapid development of 5G technology, the frequency bands that can be used for communication are gradually increasing. Correspondingly, the number of antennas in electronic devices is also increasing.

[0003] At present, for electronic devices (such as mobile phones), CNC (Computer Numerical Control) technology is generally used to design antennas on the frame, which makes antennas of various frequency bands concentrated and stacked on the frame of the mobile phone.

[0004] However, when antennas of different frequency bands are stacked on the frame, the antennas may affect each other, resulting in performance degradation. Utility Model Content

[0005] The present disclosure provides an electronic device that can solve the technical problems existing in the related art. The technical solution of the electronic device is as follows:

[0006] The present disclosure provides an electronic device, the electronic device comprising a mainboard and an antenna;

[0007] The main board includes a first circuit board, an intermediate board, and a second circuit board, the first circuit board, the intermediate board, and the second circuit board are stacked in sequence, the first circuit board has a feeding interface, the feeding interface is used to be electrically connected to the radio frequency component of the electronic device, and the first circuit board and the second circuit board are electrically connected through the intermediate board;

[0008] The antenna is fixed on the first side wall of the intermediate board and is electrically connected to the feeding interface.

[0009] In a possible implementation, the antenna includes a first part and a second part;

[0010] The first portion is fixed to the first side wall of the intermediate board;

[0011] The first circuit board has a first avoidance portion on one side close to the first side wall, one end of the second portion is connected to the first portion, and the other end is bent toward the first avoidance portion and connected to the feeding interface.

[0012] In a possible implementation manner, the second portion is attached to the intermediate board.

[0013] In a possible implementation, the first part is a rectangular thin plate structure, the length of the first part is in the range of [14mm, 18mm], the width of the first part is in the range of [1.1mm, 1.5mm], and the thickness of the first part is in the range of [0.0035mm, 0.015mm].

[0014] In a possible implementation manner, the length of the first portion is 16 mm, the width of the first portion is 1.3 mm, and the thickness of the first portion is 0.01 mm.

[0015] In a possible implementation, the electronic device further includes a middle frame, and the main board further includes a third circuit board;

[0016] The first wall surface of the middle frame has a receiving groove, and the first wall surface is a side wall surface in the thickness direction;

[0017] The third circuit board is fixed in the accommodating cavity;

[0018] The second circuit board, the intermediate board and the first circuit board are sequentially distributed in a first direction, and the first direction is a direction in which the bottom of the accommodating groove points to the third circuit board.

[0019] In a possible implementation manner, the antenna is located outside the accommodating cavity.

[0020] In a possible implementation, the second wall surface of the antenna is parallel to the first wall surface, the distance from the second wall surface to the first wall surface is greater than or equal to 0.4 mm, and the second wall surface is a side wall surface of the antenna close to the middle frame.

[0021] In a possible implementation manner, the first side wall protrudes relative to the third circuit board, and a protruding distance of the first side wall relative to the third circuit board is greater than or equal to 2.4 mm.

[0022] In a possible implementation manner, an accommodation space is formed between the first circuit board and the second circuit board, and the first side wall is located outside the accommodation space.

[0023] In a possible implementation, the electronic device further includes a shielding cover;

[0024] The shielding cover is connected to the first circuit board and is used to cover at least part of the electrical components arranged on the first circuit board.

[0025] The technical solution provided by the present disclosure includes at least the following beneficial effects:

[0026] The present disclosure provides an electronic device, in which the main board of the electronic device is a sandwich-type stacked main board, and the antenna is fixed on the side wall of the intermediate board of the main board, which can avoid that antennas of different frequency bands are all stacked in the middle frame position of the electronic device, so that the arrangement positions of antennas of different frequency bands are relatively dispersed, which can reduce the mutual influence between antennas.

[0027] 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 disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the description, are used to explain the principles of the present disclosure. In the drawings:

[0029] Figure 1 is a structural schematic diagram of an electronic device provided by an embodiment of the present disclosure;

[0030] Figure 2 is a partial enlarged view of an electronic device provided by an embodiment of the present disclosure;

[0031] Figure 3 is an exploded schematic diagram of an electronic device provided by an embodiment of the present disclosure;

[0032] Figure 4 is a half-section schematic diagram of an electronic device provided by an embodiment of the present disclosure;

[0033] Figure 5 is a structural schematic diagram of an electronic device provided by an embodiment of the present disclosure;

[0034] Figure 6 is a structural schematic diagram of an electronic device provided by an embodiment of the present disclosure;

[0035] Figure 7 is a structural schematic diagram of an electronic device provided by an embodiment of the present disclosure;

[0036] Figure 8 is a structural schematic diagram of an electronic device provided by an embodiment of the present disclosure;

[0037] Fig. 9 is a schematic diagram of a change in antenna echo coefficient with frequency provided by an embodiment of the present disclosure;

[0038] Fig.10 This is a schematic diagram of the variation of antenna radiation efficiency with frequency provided by an embodiment of the present disclosure.

[0039] Legend

[0040] 1. Motherboard;

[0041] 11. First circuit board; 12. Intermediate board; 13. Second circuit board; 14. Third circuit board;

[0042] 111, feeding interface; 112, first avoidance portion; 121, first side wall;

[0043] 2. Antenna;

[0044] 21. Part I; 22. Part II;

[0045] 201, second wall;

[0046] 3. Middle frame;

[0047] 31. First wall;

[0048] 301, receiving tank;

[0049] 01. Accommodate space;

[0050] 4. Shielding cover.

[0051] The above drawings show clear embodiments of the present disclosure, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present disclosure in any way, but to illustrate the concepts of the present disclosure to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0053] The present disclosure provides an electronic device, such as Figure 1-Figure 3 As shown, the electronic device includes a mainboard 1 and an antenna 2. The mainboard 1 includes a first circuit board 11, an intermediate board 12 and a second circuit board 13, the first circuit board 11, the intermediate board 12 and the second circuit board 13 are stacked in sequence, the first circuit board 11 has a feeding interface 111, and the antenna 2 is fixed on a first side wall 121 of the intermediate board 12 and is electrically connected to the feeding interface 111.

[0054] The feeding interface 111 is used to be electrically connected to a radio frequency component of the electronic device, and the first circuit board 11 and the second circuit board 13 are electrically connected via the intermediate board 12 .

[0055] In this way, in the electronic device, the main board 1 is a sandwich-type main board, and the antenna 2 is arranged on the first side wall 121 of the intermediate board 12 of the main board 1, which can avoid the antennas of different frequency bands being stacked in the middle frame of the electronic device, so that the arrangement positions of the antennas of different frequency bands are relatively dispersed, which can reduce the mutual influence between the antennas.

[0056] It is easy to understand that in the present invention, "electrical connection" can be understood as physical contact and electrical conduction between components; it can also be understood as a form in which different components in a circuit structure are connected through physical lines such as printed circuit board (PCB) copper foil or wires that can transmit electrical signals.

[0057] In some possible embodiments, the first circuit board 11 and the second circuit board 13 may be a printed circuit board (PCB), a flexible printed circuit board (FPC), a rigid-flexible board, or the like.

[0058] In this embodiment, the first circuit board 11, the intermediate board 12 and the second circuit board 13 are stacked in sequence to form a sandwich-type PCB structure, which can increase the space for arranging electronic components in the thickness direction of the main board 1. At the same time, it is beneficial to reduce the stacking height of the circuit board module and improve the heat dissipation environment of the circuit board module.

[0059] In some possible embodiments, two surfaces of the intermediate board 12 along the stacking direction are working surfaces, and the first circuit board 11 and the second circuit board 13 are stacked on the two working surfaces respectively. The first circuit board 11 and the second circuit board 13 transmit electrical signals through electrodes inside the intermediate layer 12.

[0060] In some possible embodiments, the antenna 2 comprises multiple parts.

[0061] See also Figure 2 The antenna 2 includes a first part 21 and a second part 22. The first part 21 is fixed on the first side wall 121 of the intermediate board 12. The first circuit board 11 has a first avoidance portion 112 on one side close to the first side wall 121. One end of the second part 22 is connected to the first part 21, and the other end is bent toward the first avoidance portion 112 and connected to the feeding interface 111.

[0062] Specifically, the shape of the first avoidance portion 112 may be rectangular, and the feed interface 111 is located in the first avoidance portion 112 and is electrically connected to the RF components of the electronic device. The RF components in the electronic device may include filters, amplifiers, etc. These RF components may be arranged entirely on the first circuit board 11, or entirely on the second circuit board 13, or partially on the first circuit board 11 and partially on the second circuit board 13. When the RF components are partially arranged on the first circuit board 11 and partially on the second circuit board 13, these RF components may be electrically connected through the intermediate board 12.

[0063] The technical solution provided by the embodiment of the present disclosure sets the feeding interface 111 in the first avoidance portion 112, so that the feeding interface 111 is away from other electrical components arranged on the first circuit board 11, thereby preventing the feeding interface 111 from being affected by other electrical components and affecting the performance of the antenna 2.

[0064] It is understandable that the first avoidance portion 112 may also be in other shapes, such as an arc shape, and the embodiment of the present disclosure is not limited to this.

[0065] In one example, if Figure 2 As shown, the first part 21 has a rectangular thin plate structure, the width of the first part 21 is equal to the height of the first side wall 121, the upper surface of the first part 21 is flush with the working surface at the top of the intermediate board 12, and the lower surface of the first part is flush with the working surface at the bottom of the intermediate board 12. The second part 22 also has a rectangular plate structure, the first end of the second part 22 is flush with the wall surface of the first part 21 away from the first side wall 121, and is connected to the first part 21, and the second end of the second part 22 is connected to the feeding interface 111.

[0066] In one example, the first part is a rectangular thin plate structure, the length of the first part 21 is in the range of [14mm, 18mm], the width of the first part 21 is in the range of [1.1mm, 1.5mm], and the thickness of the first part 21 is in the range of [0.0035mm, 0.015mm].

[0067] For example, the arrangement direction of the first part 21 can be parallel to the intermediate board 12, that is, the upper surface of the first part 21 is parallel to the working surface at the top of the intermediate board 12, and the lower surface of the first part 21 is parallel to the working surface at the bottom of the intermediate board 12. The length of the first part 21 can be 16 mm, the width of the first part 21 can be 1.3 mm, and the thickness of the first part 21 is 0.01 mm.

[0068] Further, see Figure 2 , the second part 22 is attached to the intermediate board 12, that is, the second part 22 is attached to the wall of the intermediate board 12 away from the second circuit board 13. In this way, the second part 22 of the antenna 2 can be prevented from being suspended in the air, and the connection stability between the antenna 2 and the intermediate board 12 can be improved.

[0069] Optionally, the first part 21 and the second part 22 of the antenna 2 are integrally formed.

[0070] According to the simulation results, Fig. 9As shown, the antenna 2 is arranged on the first side wall 121 of the intermediate board 12. The working frequency band of the antenna 2 is located in the N79 frequency band, specifically covering the 4.8-4.9GHz key frequency band. In the N79 frequency band, the echo coefficient (S1,1) of the antenna 2 is less than -6db, which has very good performance. Fig.10 A schematic diagram of the whole machine simulation radiation efficiency of the technical solution provided by the embodiment of the present disclosure, such as Fig.10 As shown, the technical solution provided by the embodiment of the present disclosure has a significant improvement in the radiation efficiency of the whole machine in the 4.6GHz-5.1GHz frequency band, and in the 4.8-4.9GHz key frequency band, the average radiation efficiency reaches -3db, with excellent performance.

[0071] In this embodiment, the electronic device further includes a middle frame 3 , and the mainboard 1 further includes a third circuit board 14 .

[0072] See also Figure 3 The first wall surface 31 of the middle frame 3 has a receiving groove 301. The first wall surface 31 is a side wall surface in the thickness direction. The second circuit board 13, the intermediate board 12 and the first circuit board 11 are sequentially distributed in the first direction. The first direction is the direction in which the bottom of the receiving groove 301 points to the third circuit board 14. Figure 4 As shown, the third circuit board 14 is fixed in the receiving groove 301 .

[0073] The shape and size of the receiving groove 301 are respectively matched with the shape and size of the third circuit board 14 .

[0074] In some possible embodiments, the wall surface of the second circuit board 13 close to the third circuit board 14 is flush with the first wall surface 31 of the middle frame 3 , and the antenna 2 is completely located outside the accommodating groove 301 .

[0075] In implementation, other antennas (hereinafter referred to as frame antennas) different from the frequency band to which antenna 2 belongs may be arranged on the side wall of the receiving groove 301. In one example, the frequency corresponding to the frequency band to which the frame antenna belongs is lower than the frequency corresponding to the frequency band of antenna 2. In this example, if the frame antenna generates a high-order mode during use, the frequency of the high-order mode may be close to the frequency corresponding to antenna 2, affecting antenna 2. In another example, the frame antenna may be a loop antenna, and the frame antenna generates a LOOP mode during use, which may affect antenna 2. Therefore, arranging antenna 2 outside the receiving groove 301 can reduce the mutual influence between antennas of different frequency bands.

[0076] In one example, there is clearance between the antenna 2 and the side wall of the receiving groove 301 in the thickness direction of the electronic device.

[0077] like Figure 5As shown, the second wall surface 201 of the antenna 2 is parallel to the first wall surface 31 , and there is a gap between the second wall surface 201 and the first wall surface 31 .

[0078] The second wall surface 201 is a wall surface of the antenna 2 close to the middle frame 3 .

[0079] In implementation, the second wall surface 201 of the antenna 2 can be flush with the working surface at the bottom of the intermediate board 12, the working surface at the bottom of the intermediate board 12 is attached to the surface of the second circuit board 13 away from the third circuit board 14, and the wall surface of the second circuit board 13 close to the third circuit board 14 is flush with the first wall surface 31, that is, the gap between the second wall surface 201 and the first wall surface 31 of the antenna 2 is the thickness of the second circuit board 13.

[0080] Furthermore, the distance between the second wall surface 201 and the first wall surface 31 is greater than or equal to 0.4 mm.

[0081] Exemplarily, the distance between the second wall surface 201 and the first wall surface 31 may be 0.4 mm, 0.5 mm, 0.6 mm, and so on.

[0082] In this way, it can be ensured that the antenna 2 and the middle frame antenna have sufficient clearance in the thickness direction of the electronic device.

[0083] In one example, the electronic device is a foldable screen mobile phone, the above-mentioned middle frame 3 is the BASE side (left side) frame of the foldable screen mobile phone, the foldable screen mobile phone also includes a right side frame and a display module, the right side frame of the foldable screen mobile phone is connected to the above-mentioned left side frame through a hinge structure, the display module is located on the side of the middle frame 3 away from the motherboard 1, and is respectively connected to the left side frame and the right side frame of the foldable screen mobile phone.

[0084] The technical solution provided by the embodiment of the present disclosure is that in the case of a folding screen mobile phone of an electronic device, for the unfolded condition, since the antenna 2 is arranged outside the receiving groove 301 of the middle frame 3, the antenna 2 and the middle frame antenna can have sufficient clearance in the thickness direction of the electronic device, thereby reducing the mutual influence between the antenna 2 and the middle frame antenna. For the closed condition, since the antenna 2 is arranged outside the receiving groove 301 of the middle frame 3, the right frame of the folding screen mobile phone will be located on the side of the middle frame 3 away from the motherboard 1. The middle frame 3 is a shielding cover for the right frame, which can prevent the antenna 2 from being affected by the right frame, thereby improving the performance of the antenna 2 of the folding screen mobile phone in the closed condition, so that the performance of the antenna 2 in the unfolded condition and the closed condition tends to be consistent.

[0085] In one example, there is a clearance between the antenna 2 and the third circuit board 14 .

[0086] like Figure 6As described above, the first side wall 12 of the intermediate board 12 protrudes relative to the third circuit board 14 , and the antenna 2 is arranged on the first side wall 12 , that is, the antenna 2 protrudes relative to the third circuit board 14 .

[0087] Furthermore, the protrusion distance of the antenna 2 relative to the third circuit board 14 is greater than or equal to 2.4 mm.

[0088] In implementation, the third circuit board 14 is installed in the accommodating groove 301, and antennas of other frequency bands may be arranged on the groove wall of the accommodating groove 301. The antenna 2 is arranged to protrude relative to the third circuit board 14, and the protruding distance is greater than or equal to 2.4 mm. On the one hand, there can be sufficient clearance between the antenna 2 and the electrical components arranged on the third circuit board 14. On the other hand, there can be sufficient clearance between the antenna 2 and the groove wall of the accommodating groove 301, thereby preventing the antenna 2 from being affected by the electrical components on the third circuit board 14 and the antenna arranged on the groove wall of the accommodating groove 301, thereby improving the performance of the antenna 2.

[0089] Optionally, attend Figure 6 , the protruding direction of the antenna 2 relative to the third circuit board 14 can be the width direction of the electronic device.

[0090] Exemplarily, the protrusion distance of the antenna 2 relative to the third circuit board 14 may be 2.4 mm, 2.5 mm, 2.6 mm, and so on.

[0091] In some possible embodiments, the intermediate board 12 partially protrudes between the first circuit board 11 and the second circuit board 13 , and the antenna 2 is fixed to a wall surface of the intermediate board 12 outside the first circuit board 11 and the second circuit board 13 .

[0092] See also Figure 7 The first circuit board 11 and the second circuit board 13 are arranged in parallel, and a receiving space 01 is formed between the first circuit board 11 and the second circuit board 13. The intermediate board 12 is located in the receiving space 01, and the two working surfaces of the intermediate board 12 are respectively connected to the first circuit board 11 and the second circuit board 13. The first side wall 121 of the intermediate board 12 is located outside the above-mentioned receiving space 01, and the antenna 2 is fixed on the first side wall 121.

[0093] In this way, it can be ensured that there is clearance between the antenna 2 and the electrical components arranged on the first circuit board 11 and the electrical components arranged on the second circuit board 13, thereby avoiding these electrical components from affecting the antenna 2 and improving the performance of the antenna 2.

[0094] In one example, the distance between the electrical components arranged on the first circuit board 11 and the electrical components arranged on the second circuit board 13 and the antenna 2 is greater than 3 mm.

[0095] The above distance may be the distance from the geometric center of the electrical component to the wall surface where the antenna 2 and the first side wall 121 are in contact.

[0096] In this way, it can be ensured that there is clearance between the antenna 2 and the electrical components arranged on the first circuit board 11 and the electrical components arranged on the second circuit board 13, thereby avoiding these electrical components from affecting the antenna 2 and improving the performance of the antenna 2.

[0097] In some possible embodiments, the electronic device further includes a shielding cover 4 .

[0098] See also Figure 8 The shielding cover 4 is connected to the first circuit board 11 and is used to cover at least part of the electrical components arranged on the first circuit board 11.

[0099] Specifically, the shielding cover 4 can be located on a side of the first circuit board 11 away from the intermediate board 12 and connected to the first circuit board 11. The shielding cover 4 and the first circuit board 11 can be connected by bonding or welding, which is not limited in the embodiments of the present disclosure.

[0100] In implementation, the intermediate board 12 has a blocking effect on the electrical components arranged on the second circuit board 13, and there are no obstacles between the electrical components arranged on the first circuit board 11 and the antenna 2. Therefore, a shielding cover 4 can be provided to cover at least part of the electrical components arranged on the first circuit board 11, thereby reducing the influence of the electrical components arranged on the first circuit board 11 on the antenna 2.

[0101] The technical solution provided by the present disclosure includes at least the following beneficial effects:

[0102] The present disclosure provides an electronic device, which has a sandwich-stacked mainboard 1, and an antenna 2 is fixed on the side wall of an intermediate board 12 of the mainboard 1, so that antennas of different frequency bands can be prevented from being stacked in a middle frame of the electronic device, so that the arrangement positions of antennas of different frequency bands are relatively dispersed, which can reduce the mutual influence between antennas.

[0103] In the embodiments of the present disclosure, the electronic device may be a smart phone, a tablet computer, a laptop computer, a wearable device (e.g., a smart watch, a smart bracelet), or other electronic device with communication functions. The present disclosure does not specifically limit the specific technology and specific device form adopted by the electronic device.

[0104] In the description of this specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present disclosure.

[0105] It is to be understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include plural forms, unless the context clearly indicates other meanings.

[0106] It is further understood that the terms "first", "second", etc. are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not indicate a specific order or degree of importance. In fact, the expressions "first", "second", etc. can be used interchangeably. For example, without departing from the scope of the present disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.

[0107] It can be further understood that the orientation or position relationship indicated by terms such as "center", "longitudinal", "lateral", "front", "rear", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation.

[0108] It is further understood that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral molding; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection without other components between the two, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0109] It is further understood that, although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood as requiring the operations to be performed in the specific order shown or in a serial order, or requiring the execution of all the operations shown to obtain the desired results. In certain environments, multitasking and parallel processing may be advantageous.

[0110] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the scheme disclosed herein. The present disclosure is intended to cover any variation, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following scope of rights.

[0111] It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the scope of the appended claims.

Claims

1. An electronic device, characterized in that: The electronic device comprises a mainboard (1) and an antenna (2): The main board (1) comprises a first circuit board (11), an intermediate board (12) and a second circuit board (13); the first circuit board (11), the intermediate board (12) and the second circuit board (13) are stacked in sequence; the first circuit board (11) has a feeding interface (111); the feeding interface (111) is used to be electrically connected to a radio frequency component of the electronic device; the first circuit board (11) and the second circuit board (13) are electrically connected via the intermediate board (12); The antenna (2) is fixed on the first side wall (121) of the intermediate board (12) and is electrically connected to the feeding interface (111).

2. The electronic device according to claim 1, characterized in that: The antenna (2) comprises a first part (21) and a second part (22); The first part (21) is fixed on the first side wall (121) of the intermediate board (12); The first circuit board (11) has a first avoidance portion (112) on one side close to the first side wall (121); one end of the second portion (22) is connected to the first portion (21), and the other end is bent toward the first avoidance portion (112) and connected to the feeding interface (111).

3. The electronic device according to claim 2, characterized in that: The second portion (22) is attached to the intermediate board (12).

4. The electronic device according to claim 2, characterized in that: The first part (21) is a rectangular thin plate structure, the length of the first part (21) is in the range of [14mm, 18mm], the width of the first part (21) is in the range of [1.1mm, 1.5mm], and the thickness of the first part (21) is in the range of [0.0035mm, 0.015mm].

5. The electronic device according to claim 4, characterized in that: The length of the first portion (21) is 16 mm, the width of the first portion (21) is 1.3 mm, and the thickness of the first portion (21) is 0.01 mm.

6. The electronic device according to claim 1, characterized in that: The electronic device further comprises a middle frame (3), and the main board (1) further comprises a third circuit board (14); The first wall surface (31) of the middle frame (3) has a receiving groove (301), and the first wall surface (31) is a side wall surface of the middle frame (3) in the thickness direction; The third circuit board (14) is fixed in the containing groove (301); The second circuit board (13), the intermediate board (12) and the first circuit board (11) are distributed in sequence in a first direction, and the first direction is the direction in which the bottom of the accommodating groove (301) points towards the third circuit board (14).

7. The electronic device according to claim 6, characterized in that: The antenna (2) is located outside the receiving groove (301).

8. The electronic device according to claim 7, characterized in that: The second wall surface (201) of the antenna (2) is parallel to the first wall surface (31), the distance between the second wall surface (201) and the first wall surface (31) is greater than or equal to 0.4 mm, and the second wall surface (201) is a side wall surface of the antenna (2) close to the middle frame (3).

9. The electronic device according to claim 7, characterized in that: The first side wall (121) protrudes relative to the third circuit board (14), and the protrusion distance of the first side wall (121) relative to the third circuit board (14) is greater than or equal to 2.4 mm.

10. The electronic device according to any one of claims 1 to 9, characterized in that: An accommodating space (01) is formed between the first circuit board (11) and the second circuit board (13), and the first side wall (121) is located outside the accommodating space (01).

11. The electronic device according to any one of claims 1 to 9, characterized in that: The electronic device also includes a shielding cover (4); The shielding cover (4) is connected to the first circuit board (11) and is used to cover at least part of the electrical components arranged on the first circuit board (11).

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