Electronic device

Abstract

The application discloses an electronic device, comprising: a frame antenna, a camera, a flexible circuit board, a conductive member, a mainboard, a first grounding member and a second grounding member; the flexible circuit board is arranged between the camera and the frame antenna, and the camera is electrically connected with the mainboard through the flexible circuit board; the conductive member is arranged between the flexible circuit board and the frame antenna, a first position of the conductive member is connected with the mainboard through the first grounding member, a second position of the conductive member is connected with the mainboard through the second grounding member, a first region of the conductive member is electrically connected with the flexible circuit board, and the first region is located between the first position and the second position; the first grounding member, the conductive member, the flexible circuit board and the second grounding member form a resonance loop, a resonance frequency of the resonance loop is a first resonance frequency, and the first resonance frequency is outside a working frequency band of the frame antenna.

Description

Technical Field

[0001] This application belongs to the field of electronic technology, specifically relating to an electronic device. Background Technology

[0002] Currently, as the stacking space of mobile phones and other electronic devices becomes increasingly compact, the distance between the front camera and the mid-frame antenna is getting closer and closer. At the same time, in order to improve the space utilization of the stacking, the front camera is usually placed horizontally. The physical distance between the front camera and the top antenna of the mid-frame is close, the coupling area is large, and the coupling is strong, which leads to the problem of front camera interference antenna being quite common.

[0003] In existing technologies, conductive cloth or multiple conductive foams are usually attached to the back of the front camera and grounded to solve the interference problem between the front camera and the antenna. However, the solution of directly grounding the conductive foam or conductive cloth has a poor interference resolution effect. Summary of the Invention

[0004] The purpose of this application is to provide an electronic device that can solve the problem of poor interference resolution in existing solutions for interference between the front-facing camera and the antenna.

[0005] In a first aspect, embodiments of this application provide an electronic device, including: a frame antenna, a camera, a flexible circuit board, a conductive component, a motherboard, a first grounding component, and a second grounding component; The flexible circuit board is disposed between the camera and the frame antenna, and the camera is electrically connected to the motherboard through the flexible circuit board; The conductive component is disposed between the flexible circuit board and the frame antenna. The first position of the conductive component is connected to the motherboard through the first grounding component, and the second position of the conductive component is connected to the motherboard through the second grounding component. The first area of ​​the conductive component is electrically connected to the flexible circuit board, and the first area is located between the first position and the second position. The first grounding component, the conductive component, the flexible circuit board, and the second grounding component constitute a resonant circuit. The resonant frequency of the resonant circuit is a first resonant frequency, which is outside the operating frequency band of the frame antenna.

[0006] In the embodiments of this application, a resonant circuit is formed by using the flexible circuit board of the camera body, designing conductive components and grounding components at both ends connected to it, and controlling the resonant frequency of the resonant circuit to be offset from the operating frequency band of the frame antenna, thereby effectively reducing the radiation efficiency of the camera flexible circuit board, weakening the coupling between the camera flexible circuit board and the frame antenna, and effectively solving the interference problem between the camera and the frame antenna. Applying the solution of the embodiments of this application can significantly improve the anti-interference effect.

[0007] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0008] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the antenna structure between the frame antenna and the front-facing camera of an electronic device according to an embodiment of this application; Figure 2 This is a schematic diagram of the antenna structure between the frame antenna and the front-facing camera of an electronic device according to another embodiment of this application; Figure 3 This is a schematic diagram of the antenna structure between the frame antenna and the front-facing camera of an electronic device according to another embodiment of this application; Figure 4 This is a schematic diagram of the antenna structure between the frame antenna and the front-facing camera of an electronic device according to another embodiment of this application. Detailed Implementation

[0009] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0010] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and do not limit the number of objects; for example, a first object can be one or more. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0011] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0012] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0013] The antenna structure of the electronic device provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0014] Please see Figure 1 and Figure 2 , Figure 1 and Figure 2 This is a schematic diagram of the antenna structure of an electronic device provided in an embodiment of this application. Figure 1 and Figure 2 As shown, the electronic device includes: The components include a frame antenna 101, a camera 102, a flexible circuit board 103, a conductive component 104, a main board 105, a first grounding component 1061, and a second grounding component 1062. The flexible circuit board 103 is disposed between the camera 102 and the frame antenna 101, and the camera 102 is electrically connected to the motherboard 105 through the flexible circuit board 103. A conductive component 104 is disposed between the flexible circuit board 103 and the frame antenna 101. The first position 1041 of the conductive component 104 is connected to the main board 105 through the first grounding component 1061. The second position 1042 of the conductive component 104 is connected to the main board 105 through the second grounding component 1062. The first region 1040 of the conductive component 104 is electrically connected to the flexible circuit board 103. The first region 1040 is located between the first position 1041 and the second position 1042. The first grounding component 1061, the conductive component 104, the flexible circuit board 103, and the second grounding component 1062 constitute a resonant circuit. The resonant frequency of the resonant circuit is the first resonant frequency, which is outside the operating frequency band of the frame antenna 101.

[0015] like Figure 1 and Figure 2 As shown, the electronic device in this embodiment includes, from top to bottom, main structural components such as a frame antenna 101, a conductive component 104, a flexible circuit board 103, a camera 102, and a motherboard 105, as well as a first grounding component 1061 and a second grounding component 1062 located at both ends of the flexible circuit board 103.

[0016] In this design, the bezel antenna 101 is the mid-frame antenna of a mobile phone or other electronic device, and the camera 102 can be a front-facing camera, an infrared camera, or any other camera located close to the bezel antenna. In a specific example, the bezel antenna 101 is the top bezel antenna, and the camera 102 is a front-facing camera very close to the top bezel antenna. It should be noted that... Figure 1 and Figure 2 The image shown could specifically be the lens of camera 102.

[0017] The flexible printed circuit (FPC) 103, also called a flexible board, can specifically be the flexible board for the camera 102. The flexible printed circuit 103 can be positioned between the camera 102 and the frame antenna 101, and is in contact with the camera 102. Figure 1 and Figure 2 As shown, the camera 102 is electrically connected to the motherboard 105 via a flexible circuit board 103. It should be noted that, specifically, one end of the flexible circuit board 103 can be in contact with the camera 102, and the other end can be fastened to the motherboard 105 via a board-to-board (BTB) connector 109, thereby realizing the electrical connection between the camera 102 and the motherboard 105.

[0018] The conductive component 104 can be a conductive part that is laid on the flexible circuit board 103 and electrically connected to the flexible circuit board 103. For example, it can be made of conductive cloth, conductive metal, or other materials, or it can be a metal component such as the motherboard bracket in a reused electronic device.

[0019] The core design theory of this application embodiment is to make the flexible circuit board 103 of the camera 102 resonate outside the operating frequency band of the frame antenna 101, so that the frequencies of the two are staggered, reducing the interference caused by coupling. Therefore, the key to this application embodiment lies in designing and constructing the resonant circuit of the flexible circuit board 103, and achieving the target resonant frequency by designing the corresponding resonant circuit electrical length, for example, Figure 1The operating frequency band of the mobile phone frame antenna 101 is generally mid-to-high frequency (1.7GHz~2.69GHz), N78 band (3.3 GHz~3.8GHz), WIFI 2.4G (2.4GHz~2.5GHz), WIFI 5G (5.15GHz~5.85GHz), etc. Therefore, the resonant frequency generated by the resonant circuit composed of the flexible circuit board 103 and conductive component 104 can be designed to be between 4GHz and 5GHz, so as to be staggered from the operating frequency band of the frame antenna 101, thereby achieving effective decoupling between the flexible circuit board body of camera 102 and frame antenna 101. That is to say, there is a frequency difference between the first resonant frequency generated by the above resonant circuit and the operating frequency of frame antenna 101.

[0020] Based on the above design theory, feed points can be designed at appropriate positions at both ends of the conductive component 104 to construct a resonant circuit capable of generating the desired resonant frequency. Specifically, for example... Figure 1 and Figure 2 As shown, the conductive member 104 can be connected to the ground of the motherboard 105 at a first position 1041 on the left side via a first grounding member 1061, i.e., connected to the ground plane on the motherboard 105. At a second position 1042 on the right side of the conductive member 104, it can be connected to the ground of the motherboard 105 via a second grounding member 1062. Additionally, a section in the middle of the conductive member 104, i.e., a first region 1040, is in contact with and electrically connected to the flexible circuit board 103; that is, this first region 1040 is located between the first position 1041 and the second position 1042. The first grounding member 1061 and the second grounding member 1062 can be conductive metal structural components.

[0021] Thus, the first grounding component 1061, the conductive component 104, the flexible circuit board 103, and the second grounding component 1062 can form a resonant circuit, capable of generating a corresponding resonant frequency. The current in this circuit flows sequentially from the first grounding component 1061 through the conductive component 104, the flexible circuit board 103, the second grounding component 1062, and finally to the main board 105. In a specific example, the resonant frequency of the resonant circuit can be achieved by designing the specific positions of the first grounding component 1061 and the second grounding component 1062 at both ends of the conductive component 104, as well as the length of the conductive component 104. This first resonant frequency is the desired frequency that is offset from and does not overlap with the operating frequency band of the frame antenna 101. For example, the resonant circuit can be designed to operate in a half-wave loop resonant mode, with the total electrical length of the components corresponding to the resonant circuit being approximately half the wavelength of the desired first resonant frequency.

[0022] Optionally, the conductive component 104 is the motherboard bracket of the electronic device, and the electronic device also includes conductive foam 107, the motherboard bracket being electrically connected to the flexible circuit board 103 through the conductive foam 107; The first grounding component 1061, the main board bracket, the conductive foam 107, the flexible circuit board 103, and the second grounding component 1062 constitute the resonant circuit.

[0023] In some embodiments of this application, the existing motherboard bracket in the electronic device can be used as the conductive component 104. Specifically, the antenna structure design is as follows: Figure 2 As shown, a conductive foam 107 is placed between the flexible circuit board 103 and the motherboard bracket to electrically connect the flexible circuit board 103 and the motherboard bracket, forming a resonant circuit. The current flow direction of this circuit is as follows: Figure 2 The direction of the arrow is indicated. In this way, the required resonance can be achieved by reusing the motherboard bracket of the electronic device. Only a small section of conductive foam needs to be filled between the motherboard bracket and the flexible circuit board 103, without the need for additional high-cost materials such as conductive cloth, which reduces the manufacturing cost of the equipment to a certain extent.

[0024] Optionally, both the first grounding component 1061 and the second grounding component 1062 are screws used to connect the motherboard bracket and the motherboard 105.

[0025] Furthermore, in some embodiments, metal parts such as screws used to connect the motherboard bracket and the motherboard 105 in electronic devices can be reused as grounding parts for the conductive component 104, without the need for additional grounding metal parts, further controlling equipment manufacturing costs. For example... Figure 2 As shown, the first grounding component 1061 and the second grounding component 1062 at both ends of the motherboard bracket are screws used to reinforce the motherboard bracket to the motherboard 105.

[0026] Optionally, the sum of the length of the first part of the motherboard bracket, the length of the conductive foam 107, and the length of the second part of the flexible circuit board 103 is equal to half the wavelength corresponding to the first resonant frequency. The first part is the portion of the motherboard bracket located between the first position 1041 and the third position 1043. The third position 1043 is located at the first end of the first region 1040, and the first end is the end of the first region 1040 facing the first position 1041. The second part is the portion of the flexible circuit board 103 located between the fourth position 1044 and the fifth position 1045. The fourth position 1044 is the position on the flexible circuit board 103 corresponding to the second end of the first region 1040. The fifth position 1045 is the position where the flexible circuit board 103 is connected to the main board 105. The second end is the end of the first region 1040 facing the second position 1042.

[0027] In some embodiments, in order to achieve a resonant frequency at a desired first resonant frequency generated by the resonant circuit formed by the first grounding element 1061, the motherboard bracket, the conductive foam 107, the flexible circuit board 103, and the second grounding element 1062, a design can be made... Figure 2 The sum of the length of the first part of the motherboard bracket, the length of the conductive foam 107, and the length of the second part of the flexible circuit board 103 is equal to half the wavelength corresponding to the first resonant frequency.

[0028] Thus, in this embodiment, the camera flexible circuit board and the surrounding metal devices can form a half-wave loop resonant mode with both ends grounded, which has low radiation efficiency and weak coupling, and can effectively de-interference between the front camera and the top antenna.

[0029] Optionally, the sum of the length of the first part, the length of the conductive foam 107, and the length of the second part ranges from 3cm to 3.7cm, and the first resonant frequency ranges from 4GHz to 5GHz.

[0030] In specific application examples, by adjusting the screw return position or other methods, the combined total length L of the first part of the motherboard bracket, the length of the conductive foam 107, and the second part of the flexible circuit board 103 can be made to be approximately 3cm to 3.7cm, with a corresponding half-wave resonant frequency of 4GHz to 5GHz, thus avoiding the operating frequency band of the frame antenna 101.

[0031] exist Figure 2 In the illustrated embodiment, the front-facing camera flexible circuit board is connected to the motherboard via conductive foam and part of the motherboard bracket, and then screwed back to the motherboard. This allows the resonant mode of the front-facing camera flexible circuit board to change from the high-efficiency inverted-FAntenna (IFA) resonant mode to the low-efficiency half-wave loop resonant mode. By adjusting the screw position, its overall resonant frequency is changed, avoiding the operating frequency band of surrounding antennas, effectively reducing the interference between the front-facing camera and surrounding antennas.

[0032] Optionally, the conductive component 104 is a conductive cloth, and the first region 1040 is the region where the flexible circuit board 103 contacts the conductive cloth; The first grounding component 1061, the conductive cloth, the flexible circuit board 103, and the second grounding component 1062 constitute the resonant circuit.

[0033] In other embodiments of this application, a conductive cloth can be laid above the flexible circuit board 103 as a conductive member 104, and the conductive cloth can achieve electrical connection with the flexible circuit board 103 through full contact. Specifically, a section of conductive cloth can be laid that fully covers the flexible circuit board 103, that is, the length of the conductive cloth can be longer than the flexible circuit board 103. Ultimately, the first grounding member 1061, the conductive cloth, the flexible circuit board 103, and the second grounding member 1062 form a resonant circuit, and the current flow direction of this circuit is as follows... Figure 1 The direction indicated by the middle arrow.

[0034] In this way, the required resonant circuit can be constructed by laying a section of conductive cloth on the camera's flexible circuit board and designing the conductive cloth to return to ground appropriately. This method is simple and easy to mass-produce.

[0035] Optionally, the first grounding component 1061 and the second grounding component 1062 are both shielding cover sidewalls on the main board 105.

[0036] Furthermore, in some embodiments, metal components such as shielding covers soldered onto the motherboard 105 of electronic devices like mobile phones can be directly used as grounding components for conductive components 104, eliminating the need for additional grounding metal components and further controlling equipment manufacturing costs. For example... Figure 1 As shown, the first grounding component 1061 and the second grounding component 1062 at both ends of the conductive cloth are shielding covers soldered onto the main board 105.

[0037] Optionally, the length of the conductive cloth between the first position 1041 and the second position 1042 is equal to half the wavelength corresponding to the first resonant frequency.

[0038] In some embodiments, in order to achieve a resonant frequency at a desired first resonant frequency generated by the resonant circuit formed by the first grounding element 1061, conductive cloth, flexible circuit board 103, and second grounding element 1062, the following design can be implemented: Figure 1 The length of the conductive cloth between the first position 1041 and the second position 1042 is approximately equal to half the wavelength corresponding to the first resonant frequency.

[0039] In some embodiments, the conductive cloth has a length of approximately 3cm to 3.7cm between the first position 1041 and the second position 1042, so that the half-wave resonant frequency generated by the resonant circuit is approximately 4GHz to 5GHz. The conductive cloth can be connected to the flexible circuit board 103 of the camera through conductive adhesive in the middle. The conductive cloth is not limited to being straight or bent. The key point is that the length of the conductive cloth can correspond to the half-wave resonant frequency of 4GHz to 5GHz, so that the camera flexible circuit board and the conductive cloth work in the half-wave LOOP resonant mode, with low radiation efficiency, weak coupling, and avoidance of the operating frequency band of the nearby frame antenna 101.

[0040] For example, in a specific implementation, the shielding cover is approximately 1.8 mm thick, the conductive cloth is approximately 4 mm long from the first position 1041 to the first region 1040, and the flexible circuit board 103 is approximately 20 mm long. The total length of the circuit is approximately 25 cm to 35 cm, resulting in a half-wave resonant frequency of 4 GHz to 5 GHz. Considering the coupling of metal near the camera module, the design length may be slightly shorter. This avoids the mid-to-high frequencies (1.7 GHz to 2.69 GHz), N78 band (3.3 GHz to 3.8 GHz), WIFI 2.4G (2.4 GHz to 2.5 GHz), and WIFI 5G (5.15 GHz to 5.85 GHz) of the antenna operating band near the camera.

[0041] exist Figure 1 In the illustrated embodiment, the front-facing camera flexible circuit board is grounded at both ends through the conductive cloth, which can change the body resonance mode from the high-efficiency IFA resonance mode to the low-efficiency half-wave LOOP resonance mode, resulting in less radiation. By controlling the length of the conductive cloth, its resonance frequency can be made to avoid the operating frequency band of the surrounding antennas, effectively reducing the interference between the front-facing camera and the surrounding antennas.

[0042] Optionally, the electronic device further includes a first tuning matching circuit 1081, which is disposed on the motherboard 105. One end of the first tuning matching circuit 1081 is electrically connected to the first grounding component 1061, and the other end of the first tuning matching circuit 1081 is electrically connected to the ground plane of the motherboard 105. The first tuning matching circuit 1081 includes a switching switch 10811 and a plurality of first tuning branches 10812. The plurality of fixed terminals of the switching switch 10811 are respectively connected to the plurality of first tuning branches 10812, and different first tuning branches correspond to different matching impedances. The first tuning matching circuit 108 is used to adjust the resonant frequency generated by the resonant circuit so that the tuned resonant frequency is far away from the operating frequency band of the frame antenna 101.

[0043] In some other embodiments of this application, in order to better achieve frequency tuning of the resonant circuit generated by the camera flexible circuit board body and the conductive component 104, a first tuning matching circuit 1081 connected to the first grounding component 1061 can be added to the motherboard 105, as detailed below. Figure 3 As shown, the first tuning matching circuit 1081 includes a switching switch 10811 and multiple first tuning branches 10812. Multiple fixed terminals of the switching switch 10811 are respectively connected to the multiple first tuning branches 10812. Different matching impedances are connected to different first tuning branches. For example, as shown... Figure 3As shown, RF1, RF2, RF3 and RF4 of the switch 10811 are connected to capacitor C1, capacitor C2, inductor L1 and inductor L2 respectively.

[0044] In practical implementation, the overall length limitation of the circuit consisting of the motherboard bracket, conductive foam 107, and flexible circuit board 103 in the overall layout of the device is reduced by adjusting the switch back to ground. This can be achieved by adjusting the capacitors and inductors of each tuning branch. For example, when the antenna near the camera 102 is operating in LTE Band 3 (1.71GHz~1.88GHz), the capacitor C1 path of RF1 can be opened by switching switch 10811, and the resonant frequency can be shifted to the higher frequency of 5GHz by connecting a 0.5pF capacitor in series. When the antenna near the camera 102 is operating in WIFI 5G Band 3 (5.15GHz~5.825GHz), the capacitor L1 path of RF3 can be opened by switching switch 10811, and the resonant frequency can be shifted to the lower frequency of 1GHz by connecting a 10nH inductor in series.

[0045] In this way, compared to Figure 2 In the illustrated implementation, this embodiment can also change the overall resonant frequency of the resonant circuit by adjusting the matching impedance of different tuning branches in the first tuning matching circuit 108, actively avoiding the operating frequency band of the frame antenna 101, and effectively reducing the interference between the front camera and the surrounding antennas.

[0046] Optionally, the electronic device further includes a second tuning matching circuit 1082, which is disposed on the motherboard 105. One end of the second tuning matching circuit 1082 is electrically connected to the frame antenna 101, and the other end of the second tuning matching circuit 1082 is electrically connected to the ground plane of the motherboard 105. The second tuning matching circuit 1082 includes a switching switch 10811 and a plurality of second tuning branches 10822. The plurality of fixed terminals of the switching switch 10811 are also respectively connected to the plurality of second tuning branches 10822. Different second tuning branches correspond to different matching impedances. Each fixed terminal of the switching switch 10811 is connected to a first tuning branch 10812 and a second tuning branch 10822. The second tuning matching circuit 1082 is used to adjust the resonant frequency generated by the resonant circuit and to adjust the operating frequency band of the frame antenna 101 so that the tuned resonant frequency is far away from the operating frequency band of the frame antenna 101.

[0047] In some other embodiments of this application, in order to better achieve synchronous frequency tuning of the resonant circuit generated by the camera flexographic board body and the conductive component 104, as well as the tuning of the antenna operating frequency band, a second tuning matching circuit 1082 connected to the frame antenna 101 can be added to the motherboard 105, and the second tuning matching circuit 1082 can share the switching switch 10811 with the first tuning matching circuit 1081.

[0048] Specifically, such as Figure 4 As shown, the second tuning matching circuit 1082 includes a switching switch 10811 and multiple second tuning branches 10822. Multiple fixed terminals of the switching switch 10811 are also connected to the multiple second tuning branches 10822 respectively. Different matching impedances are connected to different second tuning branches. For example, as shown... Figure 4 As shown, the switching switches 10811 RF1, RF2, RF3 and RF4 are also connected to capacitor C3, inductor L3, inductor L4 and inductor L5 respectively.

[0049] In this way, the frame antenna 101 can switch its operating frequency band via the switch 10811. The camera 102 is connected to the motherboard via conductive foam, motherboard bracket, screws, etc., sharing the antenna switch 10811. Through different matching on different switch paths, the resonant frequency of the camera body changes according to the operating frequency band switched by the antenna switch. The camera's resonant frequency actively avoids the antenna's operating frequency, achieving adaptive adjustment. For example, when the RF1 path of the switch 10811 is working, the frame antenna 101 operates in LTE Band 3 (1.71GHz~1.88GHz). The half-wave resonant frequency of the camera's flexible circuit board and surrounding metal is matched with C1=0.5pF to shift the resonant frequency towards the higher frequency of 5GHz, thus moving it away from the antenna's operating Band 3.

[0050] Figure 3 The illustrated implementation scheme is based on the idea of ​​controlling the pre-resonant point. It involves adding a switch to actively adjust the frequency of the pre-resonant point, requiring an additional switch and software control to achieve the frequency band avoidance effect. Figure 4 The illustrated implementation scheme is based on the antenna solution for mass production projects. It multiplexes the switch controlling the antenna's operating frequency band with the switch controlling the pre-resonant point, thereby permanently avoiding [the issue]. For example... Figure 3 In the schematic scheme, the RF1 channel is switched on, the antenna operates in the B3 band, and the matching of the front camera is controlled to actively move the front camera's resonant frequency away from B3. Figure 4 The schematic scheme avoids the forward resonant frequency and antenna operating frequency band by reusing the antenna switch and directly and permanently avoiding them in hardware.

[0051] In summary, this application analyzes the interference of the top antenna on the front-facing camera driver, first exciting the resonance of the front-facing camera's flexible printed circuit board (FPC), thereby affecting the driver's Mobile Industry Processor Interface (MIPI). The interference is greatest when the resonant frequency of the front-facing camera's FPC is close to the antenna's operating frequency. This application, through the above implementation schemes, staggers the resonant frequency of the front-facing camera's FPC from the operating frequency of the top antenna in the mid-frame, while simultaneously reducing the radiation from the front-facing camera itself, thus resolving the interference and being interfered with between the front-facing camera and the antenna.

[0052] An electronic device according to an embodiment of this application includes: a frame antenna, a camera, a flexible circuit board, a conductive component, a motherboard, a first grounding component, and a second grounding component. The flexible circuit board is disposed between the camera and the frame antenna, and the camera is electrically connected to the motherboard through the flexible circuit board. The conductive component is disposed between the flexible circuit board and the frame antenna. A first position of the conductive component is connected to the motherboard through the first grounding component, and a second position of the conductive component is connected to the motherboard through the second grounding component. A first region of the conductive component is electrically connected to the flexible circuit board, and the first region is located between the first position and the second position. The first grounding component, the conductive component, the flexible circuit board, and the second grounding component constitute a resonant circuit. The resonant frequency of the resonant circuit is a first resonant frequency, which is outside the operating frequency band of the frame antenna. Thus, by utilizing the flexible circuit board of the camera body, designing the conductive component connected to it, and the grounding components at both ends to form a resonant circuit, and controlling the resonant frequency of the resonant circuit to be offset from the operating frequency band of the frame antenna, the radiation efficiency of the camera's flexible circuit board is effectively reduced, the coupling between the camera's flexible circuit board and the frame antenna is weakened, and the interference problem between the camera and the frame antenna is effectively solved. Applying the solution of this embodiment can significantly improve the anti-interference effect.

[0053] Other configurations and operations of the electronic devices according to embodiments of this application are known to those skilled in the art and will not be described in detail here.

[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0055] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An electronic device, characterized in that, include: Frame antenna, camera, flexible circuit board, conductive components, motherboard, first grounding component and second grounding component; The flexible circuit board is disposed between the camera and the frame antenna, and the camera is electrically connected to the motherboard through the flexible circuit board; The conductive component is disposed between the flexible circuit board and the frame antenna. The first position of the conductive component is connected to the motherboard through the first grounding component, and the second position of the conductive component is connected to the motherboard through the second grounding component. The first area of ​​the conductive component is electrically connected to the flexible circuit board, and the first area is located between the first position and the second position. The first grounding component, the conductive component, the flexible circuit board, and the second grounding component constitute a resonant circuit. The resonant frequency of the resonant circuit is a first resonant frequency, which is outside the operating frequency band of the frame antenna.

2. The electronic device according to claim 1, characterized in that, The conductive component is the motherboard bracket of the electronic device, and the electronic device also includes conductive foam. The motherboard bracket is electrically connected to the flexible circuit board through the conductive foam. The first grounding component, the motherboard bracket, the conductive foam, the flexible circuit board, and the second grounding component constitute the resonant circuit.

3. The electronic device according to claim 2, characterized in that, Both the first grounding component and the second grounding component are screws that connect the motherboard bracket to the motherboard.

4. The electronic device according to claim 2 or 3, characterized in that, The sum of the length of the first part of the motherboard bracket, the length of the conductive foam, and the length of the second part of the flexible circuit board is equal to half the wavelength corresponding to the first resonant frequency. The first part is the portion of the motherboard bracket located between the first position and the third position, wherein the third position is located at the first end of the first region, and the first end is the end of the first region facing the first position; The second part is the portion of the flexible circuit board located between the fourth position and the fifth position. The fourth position is the position on the flexible circuit board corresponding to the second end of the first region. The fifth position is the position where the flexible circuit board is connected to the motherboard. The second end is the end of the first region facing the second position.

5. The electronic device according to claim 4, characterized in that, The sum of the length of the first part, the length of the conductive foam, and the length of the second part ranges from 3cm to 3.7cm, and the first resonant frequency ranges from 4GHz to 5GHz.

6. The electronic device according to claim 1, characterized in that, The conductive component is a conductive cloth, and the first region is the region where the flexible circuit board contacts the conductive cloth. The first grounding element, the conductive cloth, the flexible circuit board, and the second grounding element constitute the resonant circuit.

7. The electronic device according to claim 6, characterized in that, Both the first grounding component and the second grounding component are shielding cover sidewalls on the motherboard.

8. The electronic device according to claim 6 or 7, characterized in that, The length of the conductive cloth between the first position and the second position is equal to half the wavelength corresponding to the first resonant frequency.

9. The electronic device according to claims 1 to 8, characterized in that, The electronic device further includes a first tuning and matching circuit, which is disposed on the motherboard. One end of the first tuning and matching circuit is electrically connected to the first grounding component, and the other end of the first tuning and matching circuit is electrically connected to the ground plane of the motherboard. The first tuning matching circuit includes a switching switch and multiple first tuning branches. The multiple fixed terminals of the switching switch are respectively connected to the multiple first tuning branches, and different first tuning branches correspond to different matching impedances. The first tuning matching circuit is used to adjust the resonant frequency generated by the resonant circuit so that the tuned resonant frequency is far away from the operating frequency band of the frame antenna.

10. The electronic device according to claim 9, characterized in that, The electronic device further includes a second tuning and matching circuit, which is disposed on the motherboard. One end of the second tuning and matching circuit is electrically connected to the frame antenna, and the other end of the second tuning and matching circuit is electrically connected to the ground plane of the motherboard. The second tuning matching circuit includes the switching switch and a plurality of second tuning branches. The plurality of fixed terminals of the switching switch are also respectively connected to the plurality of second tuning branches. Different second tuning branches correspond to different matching impedances. Each fixed terminal of the switching switch is connected to a first tuning branch and a second tuning branch. The second tuning matching circuit is used to adjust the resonant frequency generated by the resonant circuit and to adjust the operating frequency band of the frame antenna so that the tuned resonant frequency is far away from the operating frequency band of the frame antenna.

Images