An electronic device

Abstract

The application discloses an electronic device, and relates to the technical field of antennas, and the electronic device comprises a shell, a cover body, a radio frequency circuit, a feeding portion and a grounding portion. The cover body and the shell jointly define a containing space, and the cover body is provided with a strip-shaped metal piece extending along a first direction. The radio frequency circuit is arranged in the containing space. The feeding portion is electrically connected between the radio frequency circuit and the strip-shaped metal piece. The grounding portion is electrically connected between the strip-shaped metal piece and a reference ground of the electronic device, and the grounding portion comprises a first grounding portion. The first grounding portion is arranged on an inner surface of the strip-shaped metal piece facing the containing space along a second direction. The strip-shaped metal piece comprises a first metal part and a second metal part located on two sides of the first grounding portion along the first direction. The second direction is different from the first direction. The strip-shaped metal piece is a radiator of a target antenna. The first metal part is a first radiation branch of the target antenna. The second metal part is a second radiation branch of the target antenna.

Description

Technical Field

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

[0002] With the continuous development of science and technology, more and more electronic devices with wireless communication functions are being widely used in people's daily lives and work, bringing great convenience to people's daily lives and work, and becoming an indispensable tool for people today.

[0003] One of the core components for enabling wireless communication in electronic devices is the antenna. The trend towards thinner and lighter electronic devices, along with the increasing integration of functions, is constantly compressing the space available for antenna placement within these devices, resulting in insufficient clearance for the antenna and thus affecting its communication performance. Summary of the Invention

[0004] In view of the above problems, this application provides an electronic device to save internal antenna layout space and improve antenna communication performance. The specific solution is as follows:

[0005] An electronic device, comprising:

[0006] case;

[0007] A cover body, which together with the shell defines an accommodating space, the cover body having a strip-shaped metal member extending along a first direction;

[0008] The radio frequency circuitry is housed within the enclosure space.

[0009] The power supply section is electrically connected between the radio frequency circuit and the strip-shaped metal component;

[0010] A grounding portion is electrically connected between the strip-shaped metal member and the reference ground of the electronic device. The grounding portion includes a first grounding portion, which is disposed along a second direction on the inner surface of the strip-shaped metal member facing the receiving space. The strip-shaped metal member includes a first metal portion and a second metal portion located along the first direction and respectively on both sides of the first grounding portion. The second direction is different from the first direction.

[0011] Among them, the strip-shaped metal part is the radiator of the target antenna, the first metal part is the first radiating branch of the target antenna, and the second metal part is the second radiating branch of the target antenna.

[0012] Optionally, in the above-mentioned electronic device, the first grounding portion includes one of the following:

[0013] The first grounding part is a strip-shaped conductor that extends along the second direction and is electrically connected between the strip-shaped metal piece and the reference ground.

[0014] The first grounding part includes a plurality of grounding conductors, which are electrically connected between the strip-shaped metal piece and the reference ground, and at least one of the plurality of grounding conductors is a strip-shaped conductor extending along the second direction;

[0015] The first grounding part includes a plurality of grounding conductors, which are electrically connected between the strip-shaped metal piece and the reference ground, and the plurality of grounding conductors are arranged in a row at intervals along the second direction.

[0016] Optionally, in the above-mentioned electronic device, a plurality of grounding conductors are arranged in a row at intervals along the second direction, including at least one strip conductor.

[0017] Optionally, in the above-mentioned electronic device, the first side of the strip conductor is electrically contacted with the inner surface of the strip metal piece, and the second side of the strip conductor opposite to the first side is electrically contacted with a conductor plate representing the reference ground of the electronic device.

[0018] Optionally, in the above-mentioned electronic device, the power supply section is electrically connected to the first metal section, the first radiating stub is the main radiating stub of the target antenna, and the second radiating stub is the parasitic stub of the target antenna. The first and second radiating stubs are configured to enable the target antenna to operate in the target frequency band and excite multiple frequency point resonant modes, and the multiple frequency points belong to the in-band of the target frequency band.

[0019] Optionally, in the above-mentioned electronic device, the dimensions of the first metal part and the second metal part satisfy a first condition, which includes one of the following: the dimensions are the same or the dimensions are similar;

[0020] The target antenna operates in the target frequency band to excite resonant modes at multiple frequency points, including a first frequency point and a second frequency point. The first frequency point and the second frequency point are adjacent, and the difference between the first frequency point and the second frequency point is less than a threshold.

[0021] Optionally, in the above-mentioned electronic device, the grounding part further includes:

[0022] The second grounding part is electrically connected between the first metal part and the reference ground of the electronic device, and the second grounding part is close to the first edge of the strip metal part;

[0023] The third grounding part is electrically connected between the second metal part and the reference ground of the electronic device. The third grounding part is located near the second edge of the strip metal part opposite to the first edge.

[0024] Optionally, in the above-mentioned electronic device, the direction from the first edge to the second edge is the second direction, and the second grounding portion and the third grounding portion are arranged symmetrically with respect to the center of the first grounding portion.

[0025] Optionally, in the above-mentioned electronic device, based on the power supply section and the grounding section, a first metal part as the main radiating branch and a second metal part as the parasitic branch are formed in the strip metal part, so that the target antenna operates in the target frequency band to excite the resonant modes of multiple frequency points, thereby increasing the bandwidth and radiation performance.

[0026] Optionally, in the above-mentioned electronic device, the housing includes a metal frame, and the electronic device also includes multiple frame antennas with the metal frame as radiators, the multiple frame antennas including at least one frame antenna capable of supporting a frequency band consistent with the frequency band supported by the target antenna;

[0027] The cover is fixed to the metal frame with insulating material, and the strip metal piece is not conductive to the metal frame; the outer surface of the strip metal piece constitutes part of the appearance surface of the cover, the third edge of the strip metal piece belongs to the first side of the cover, and the fourth edge of the strip metal piece belongs to the second side of the cover.

[0028] The first direction is from the third edge to the fourth edge. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0030] The structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this application. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this application can produce, should still fall within the scope of the technical content disclosed in this application.

[0031] Figure 1 A top rear view of an electronic device provided in this application;

[0032] Figure 2 for Figure 1 A schematic diagram of a partial structure of the electronic device shown;

[0033] Figure 3 for Figure 1 The electronic device shown is a cross-sectional view along the length of the strip-shaped metal component.

[0034] Figure 4 This is a schematic diagram of a partial structure in an electronic device provided in an embodiment of this application;

[0035] Figure 5 A schematic diagram of a partial structure in another electronic device provided in an embodiment of this application;

[0036] Figure 6 A schematic diagram of a grounding design scheme for a strip-shaped metal component in an electronic device, provided as an embodiment of this application;

[0037] Figure 7 The return loss curve of a target antenna in an electronic device provided in this application embodiment;

[0038] Figure 8 and Figure 9 The resonant current distribution of a target antenna in the 2.4G WIFI band in an electronic device provided in this application embodiment;

[0039] Figures 10-13 The resonant current distribution of a target antenna in the 5G WIFI band in an electronic device provided in this application embodiment;

[0040] Figure 14 The present application provides a system efficiency curve for a target antenna.

[0041] The annotations in the attached figures are explained as follows:

[0042] First reference direction X, second reference direction Y, third reference direction Z, housing 100, cover 101, accommodating space 102, strip metal part 103, first metal part 1031, second metal part 1032, radio frequency circuit 104, power supply part 105, grounding part 106, first grounding part 1061, second grounding part 1062, third grounding part 1063, grounding conductor 107, reference ground 108, circuit board 109, strip conductor 110, electronic component 111, metal frame 112. Detailed Implementation

[0043] The embodiments of this application will now be clearly and completely described with reference to the accompanying drawings. Those skilled in the art will recognize that, with technological advancements and the emergence of new scenarios, the technical solutions provided in the embodiments of this application are equally applicable to similar technical problems.

[0044] This application provides an electronic device, including:

[0045] case;

[0046] A cover body, which together with the shell defines an accommodating space, the cover body having a strip-shaped metal member extending along a first direction;

[0047] The radio frequency circuitry is housed within the enclosure space.

[0048] The power supply section is electrically connected between the radio frequency circuit and the strip-shaped metal component;

[0049] A grounding portion is electrically connected between the strip-shaped metal member and the reference ground of the electronic device. The grounding portion includes a first grounding portion, which is disposed along a second direction on the inner surface of the strip-shaped metal member facing the receiving space. The strip-shaped metal member includes a first metal portion and a second metal portion located along the first direction and respectively on both sides of the first grounding portion. The second direction is different from the first direction.

[0050] Among them, the strip-shaped metal part is the radiator of the target antenna, the first metal part is the first radiating branch of the target antenna, and the second metal part is the second radiating branch of the target antenna.

[0051] The electronic device of this application uses a strip-shaped metal piece on its cover as a radiator for a target antenna. The strip-shaped metal piece forms an antenna current path through a feed section and a grounding section, thus eliminating the need for a separate antenna radiator within the electronic device's internal space and reducing the space occupied by the antenna radiator. Furthermore, the first grounding section forms a first metal portion and a second metal portion on either side of the first grounding section, rather than physically severing the strip-shaped metal piece. By changing the grounding boundary conditions and current path on the strip-shaped metal piece, the metal regions on either side of the first grounding section undertake different radiation functions. The first metal portion and the second metal portion serve as a first radiating branch and a second radiating branch, respectively, thereby integrating two radiating branches on the same strip-shaped metal piece and further improving the utilization rate of the cover's metal structure and its surface space.

[0052] In the embodiments provided in this application, the strip-shaped metal component is divided into a first metal part and a second metal part by a first grounding portion. The two metal parts serve as the first radiating branch and the second radiating branch of the target antenna, respectively. The two radiating branches are different parts of the strip-shaped metal component, and therefore, the two radiating branches are an integral conductor structure. On one hand, the target antenna has a first radiating branch as the main radiating branch and a second radiating branch as a parasitic branch on the same strip-shaped metal component based on the grounding portion. This increases the number of additional resonant frequency points formed by the parasitic branches, thereby increasing the communication bandwidth of the target antenna. This further optimizes the problem of narrow bandwidth caused by using the strip-shaped metal component of the cover as the radiator of the target antenna and the spacing between it and the internal electronic components, thus improving the bandwidth of the target antenna. On the other hand, by optimizing the design of the grounding portion, the grounding boundary conditions and current paths on the strip-shaped metal component can be changed, thereby improving the radiation efficiency of the target antenna. Therefore, the embodiments provided in this application can improve the bandwidth of the target antenna and the radiation efficiency of the target antenna based on the cooperative work of the first and second radiating branches of the integral structure.

[0053] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments described in this application are merely some embodiments of this application, and not all embodiments. 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. The terminology used in the embodiments of this application is only used to explain the specific embodiments of this application and is not intended to limit this application.

[0054] refer to Figures 1-3 , Figure 1 This application provides a top view of the rear of an electronic device. Figure 2 for Figure 1 A schematic diagram of a partial structure of the electronic device shown. Figure 3 for Figure 1 The diagram shows a cross-sectional view of the electronic device along the length of the strip-shaped metal component. To clarify the design of the target antenna within the electronic device, Figure 2 The cover contains parts of the top and bottom sides of the strip-shaped metal piece.

[0055] It should be noted that, in order to clearly illustrate the relative reference directions in the structural schematic diagram of the electronic device, the relevant figures in the embodiments of this application use the same three-dimensional Cartesian coordinate system to represent the relative reference directions. This three-dimensional Cartesian coordinate system includes a first reference direction X, a second reference direction Y, and a third reference direction Z that are mutually perpendicular. The plane on which the housing is located is parallel to the XY plane, and the thickness direction of the electronic device is parallel to the third reference direction Z.

[0056] like Figures 1-3 As shown, the electronic device includes:

[0057] Casing 100;

[0058] The cover 101, together with the housing 100, defines an accommodating space 102. The cover 101 has a strip-shaped metal piece 103 extending along a first direction. Figure 1 and Figure 2 In this example, the first direction is parallel to the first reference direction X. In other cases, the first direction can be any other direction in the XY plane.

[0059] Radio frequency circuit 104 is disposed within the accommodating space 102;

[0060] The power supply unit 105 is electrically connected between the radio frequency circuit 104 and the strip-shaped metal piece 103;

[0061] Grounding portion 106 is electrically connected between strip metal member 103 and reference ground of electronic device. Grounding portion 106 includes first grounding portion 1061, which is disposed along a second direction on the inner surface of strip metal member 103 facing the receiving space 102. Strip metal member 103 includes first metal portion 1031 and second metal portion 1032 located along a first direction and on both sides of first grounding portion 1061. The second direction is different from the first direction. The first direction and the second direction are located in the XY plane and intersect.

[0062] Among them, the strip-shaped metal part 103 is the radiator of the target antenna, the first metal part 1031 is the first radiating branch of the target antenna, and the second metal part 1032 is the second radiating branch of the target antenna.

[0063] The radio frequency circuit 104 includes a radio frequency chip and can be electrically connected to the power supply unit 105 based on radio frequency signal lines. Figure 1 and Figure 2 Radio frequency signal lines are not shown. A circuit board 109 is disposed within the accommodating space 102. The radio frequency circuit 104 is disposed on the surface of the circuit board 109 facing away from the cover 101. The layout position of the radio frequency circuit 104 can be set according to the layout space requirements on the circuit board 109, and the layout position is not limited to this. Figure 2 The location shown.

[0064] Electronic devices include, but are not limited to, mobile phones, tablets, smartwatches, and other devices with wireless communication capabilities.

[0065] The cover 101 is the rear cover of the electronic device. The outer surface of the strip-shaped metal member 103 facing the outer side of the back of the electronic device is its outer surface, and the inner surface facing the inner receiving space 102 of the electronic device is its inner surface. The electronic device may have a display panel that covers the cavity opening of the receiving space 102, and the inner surface of the strip-shaped metal member 103 faces the display panel. The housing 100 includes a side wall frame of the electronic device, which may optionally be a metal frame.

[0066] In the electronic device provided in this embodiment, the strip metal piece 103 in the cover 101 can be used as the radiator of the target antenna. The radiator of the target antenna can be arranged using the surface space of the cover 101, reducing the antenna layout space inside the electronic device. At the same time, the inherent spatial distance between the cover 101 and the electronic components inside the electronic device can be used to ensure the clearance area of ​​the target antenna and improve its communication performance.

[0067] In one embodiment, the structure of the first grounding portion can be as follows: Figure 2As shown, the first grounding portion 1061 includes a plurality of grounding conductors 107, which are electrically connected between the strip-shaped metal piece 103 and the reference ground 108, respectively. The plurality of grounding conductors 107 are arranged in a row at intervals along a second direction. Optionally, the second direction may be perpendicular to the first direction, such as the first direction being parallel to the first reference direction X and the second direction being parallel to the second reference direction Y. In other ways, the second direction may intersect with the first direction but not be perpendicular to it.

[0068] The accommodating space 102 contains a circuit board 109, which includes a reference ground 108. The radio frequency circuit 104 and other electronic components of the electronic device are fixedly connected to the circuit board 109.

[0069] When the first grounding portion 1061 includes a plurality of grounding conductors 107 arranged in a row along the second direction, the plurality of discrete grounding conductors 107 are disposed on the inner surface of the strip metal part 103, which facilitates the layout of each grounding conductor 107 according to the electronic components in the electronic device, so that the first grounding portion 1061 has good assembly fault tolerance. Moreover, the plurality of discrete grounding conductors 107 can flexibly adjust the equivalent impedance by adjusting the size and spacing of each grounding conductor 107, which can not only flexibly control the resonant mode of the target antenna in the target frequency band, but also excite the high-frequency resonant point and effectively expand the bandwidth. In addition, the plurality of discrete grounding conductors 107 can flexibly adjust the distribution of the grounding area, precisely control the electrical length of the first metal part 1031 and the second metal part 1032, and then fine-tune the spacing of the resonant frequency points formed by the two radiating branches, so as to adjust the difference between two adjacent frequency points corresponding to the required communication frequency band to the required threshold.

[0070] refer to Figure 4 , Figure 4 This is a schematic diagram of a partial structure in an electronic device provided in an embodiment of this application. Based on other embodiments, Figure 4 In the illustrated electronic device, the first grounding portion 1061 includes a plurality of grounding conductors 107, which are electrically connected between the strip-shaped metal piece 103 and the reference ground 108, respectively. At least one of the plurality of grounding conductors 107 is a strip-shaped conductor 110 extending along a second direction. Figure 4In the illustrated configuration, the first grounding portion 1061 includes three grounding conductors 107 as an example. These three grounding conductors 107 are arranged in a second direction, with the middle grounding conductor 107 being a strip-shaped conductor 110 extending along the second direction. The first grounding portion includes a strip-shaped conductor extending along the second direction, which is electrically connected between the strip-shaped metal component and the reference ground of the electronic device. Compared to a smaller point grounding structure, the strip-shaped conductor can form a grounding path with a certain extension range between the strip-shaped metal component and the reference ground, increasing the electrical contact range between the first grounding portion and the strip-shaped metal component and the reference ground, thereby improving the grounding stability of the strip-shaped metal component and reducing the impact of local contact state changes on the performance of the target antenna. At the same time, the strip-shaped conductor extends along a second direction different from the first direction, which can form a grounding boundary that expands along the second direction on the strip-shaped metal component. This allows for adjustment of the high-frequency current path on the strip-shaped metal component, enabling the first metal portion and the second metal portion located on both sides of the first grounding portion to form different equivalent current distributions. This is beneficial for the first metal portion and the second metal portion to form the first radiating branch and the second radiating branch of the target antenna, respectively. Furthermore, through the cooperation of the feed section, the strip conductor, and other grounding structures, the first and second radiating stubs can participate in forming multiple resonant modes to expand the communication bandwidth of the target antenna and reduce the adverse effects of the reverse current on the parasitic stubs on the radiation efficiency of the target antenna.

[0071] Optionally, the grounding conductor 107 can be a structural component such as a conductive spring or conductive foam.

[0072] exist Figure 4 In the illustrated configuration, the first grounding portion 1061 is composed of multiple grounding conductors 107, at least one of which is a strip conductor 110. The remaining grounding conductors 107 can be point-shaped or block-shaped grounding conductors. It should be noted that in this application, strip-shaped, block-shaped, bar-shaped, and line-shaped structures refer to the vertical projection of the corresponding structure onto the XY plane (i.e., the plane where the cover is located). This method can achieve a continuous and reliable grounding effect through the strip conductor 110, and can also flexibly adjust the distribution of the grounding area through other shaped grounding conductors 107, precisely controlling the electrical length of the first metal portion 1031 and the second metal portion 1032, thereby fine-tuning the spacing between the resonant frequency points formed by the two radiating branches, so that the difference between two adjacent frequency points corresponding to the required communication frequency band can be adjusted to the required threshold.

[0073] refer to Figure 5 , Figure 5 This is a schematic diagram of a partial structure in another electronic device provided in an embodiment of this application. Based on other embodiments, Figure 5In the electronic device shown, the first grounding part 1061 is a strip conductor 110, which extends along the second direction and is electrically connected between the strip metal piece 103 and the reference ground 108.

[0074] exist Figure 5 In the illustrated configuration, the first grounding portion 1061 employs a single, integrated strip-shaped conductor 110. Physically, this divides the strip-shaped metal component 103 along a first direction into a first metal portion 1031 and a second metal portion 1032. The single strip-shaped conductor 110 enables reliable and stable grounding of the strip-shaped metal component 103, simplifies the structure of the first grounding portion 1061, and simplifies its assembly, reducing overall material and assembly costs.

[0075] In this embodiment of the application, when the first grounding portion 1061 includes a plurality of grounding conductors 107 spaced in a row along the second direction, such as Figure 4 As shown, a plurality of grounding conductors 107 are arranged in a row at intervals along the second direction, including at least one strip conductor 110. The strip conductor 110 can optimize the overall grounding impedance of the first grounding part 1061, stabilize the potential of the strip metal part 103, reduce stray resonance caused by metal suspension, and at the same time, cooperate with the other discrete grounding conductors 107 to jointly regulate the equivalent electrical length of the first metal part 1031 and the second metal part 1032, so as to adjust the difference between two adjacent resonant frequencies corresponding to the required communication frequency band to the required threshold, so that the parasitic stubs form differential mode current at the two resonant frequencies, canceling the influence of parasitic stubs on the radiation efficiency of the main radiating stubs, and so that the main radiating stubs form common mode current at the two resonant frequencies, so as to improve the radiation efficiency through the superposition of the electric field of the common mode current. When the target antenna is a WIFI antenna, the embodiments provided in this application retain the ability of discrete grounding points to adjust multiple resonant modes, which is beneficial for exciting multiple resonant points of 2.4G and 5G-WIFI to expand the bandwidth. At the same time, the strip conductor 110 improves the conductivity consistency of the grounding path, reduces the risk of antenna performance drift caused by poor contact of individual grounding points, and improves the overall reliability of the antenna.

[0076] Combination Figure 3 and Figure 4As shown, in one embodiment, an electronic component 111 is provided within a receiving space 102. The electronic component 111 is located on the inner surface of the strip metal member 103 facing the receiving space 102. The electronic component has a grounded metal housing, and a gap exists between the metal housing and the strip metal member 103. A first grounding portion 1061 includes at least a strip conductor 110 extending in a second direction, and the length of the strip conductor 110 does not exceed the length of the metal housing in the second direction, such that the two lengths can be equal. The electronic component 111 can be disposed opposite to a second metal portion 1032, and the strip conductor 110 fills the gap between the sidewall of the metal housing facing the first metal portion 1031 and the strip metal member 103. In this way, the strip metal part 103 can not only be grounded based on the side wall of the metal housing of the electronic component 111 facing the first metal part 1031 to divide it into two metal parts, but also form a front-side grounded electromagnetic isolation structure based on the strip conductor 110 and the side wall to isolate the two sides and reduce the electromagnetic interference between the two sides, thereby reducing the electromagnetic interference of the electronic components in the electronic device located in the two sides.

[0077] Optionally, the electronic component 111 can be a camera module. The strip-shaped electronic component has a camera light-receiving port in the area opposite to the camera module. Other electronic components, such as a flash, can be disposed in the area of ​​the receiving space 102 opposite to the first metal part 1031, where the first metal part 1031 has a flash light-receiving port in the area opposite to the flash.

[0078] refer to Figure 6 , Figure 6 This is a schematic diagram of a grounding design scheme for a strip-shaped metal component in an electronic device, provided as an embodiment of this application. Based on other embodiments, Figure 6 In the electronic device shown, the first grounding portion 1061 includes at least a strip-shaped conductor 110 extending along a second direction. The first surface of the strip-shaped conductor 110 is electrically contacted with the inner surface of the strip-shaped metal piece 103, and the second surface of the strip-shaped conductor 110 opposite to the first surface is electrically contacted with a conductor plate representing the reference ground 108 of the electronic device.

[0079] exist Figure 6In the illustrated configuration, the first surface of the strip conductor 110 is electrically contacted and bonded to the inner surface of the strip metal part 103, and the second surface is electrically contacted and bonded to the conductor plate of the electronic device reference ground 108. The strip conductor 110 adopts a surface contact conduction method with both surfaces tightly bonded. Compared with single-point contact, this can effectively reduce the grounding contact impedance, reduce the energy loss caused by contact resistance, ensure the conduction stability of the grounding path, avoid grounding impedance shift caused by poor contact or too small contact area, prevent resonant frequency shift and antenna radiation efficiency degradation, and ensure that the common-mode and differential-mode current modes excited by the first metal part 1031 and the second metal part 1032 are stably effective, thereby effectively expanding the bandwidth and improving the radiation efficiency of the target antenna.

[0080] In one embodiment of this application, such as Figure 2 , Figure 4 or Figure 5 As shown, the feed section 105 is electrically connected to the first metal part 1031. The first radiating stub is the main radiating stub of the target antenna, and the second radiating stub is a parasitic stub of the target antenna. The first and second radiating stubs are configured to excite multiple resonant modes at the target frequency band, with these multiple frequencies falling within the target frequency band's in-band. In this configuration, the first and second radiating stubs act as the main radiating stub and the parasitic stub, respectively, working together to form multiple in-band resonant modes within the target frequency band in the target antenna. This method not only extends the antenna bandwidth by generating additional resonance through the parasitic stubs but also, based on the integrated conductor structure of the two radiating stubs, creates a current distribution where the parasitic stub current cancels out and the main radiating stub current superimposes at adjacent resonant frequencies. This avoids the radiation efficiency reduction problem caused by using independently separated parasitic stubs in traditional antenna structures, thus improving the antenna's radiation performance while extending its operating bandwidth.

[0081] It should be noted that, in this embodiment of the application, the power supply unit 105 can be connected to one of the first metal part 1031 and the second metal part 1032 according to the needs of the internal circuit connection of the electronic device. The power supply unit 105 is not limited to being connected to the first metal part 1031.

[0082] In one embodiment of this application, the dimensions of the first metal portion 1031 and the second metal portion 1032 satisfy a first condition, which includes either: having the same dimensions or having similar dimensions. In this case, since the first metal portion acts as the main radiating branch and the second metal portion acts as a parasitic branch, the target antenna operating in the target frequency band can excite multiple resonant modes, each corresponding to a multiple resonant frequency point. Furthermore, since the dimensions (or areas) of the first metal portion (as the main radiating branch) and the second metal portion (as the parasitic branch) are the same or similar, it means that the equivalent electrical lengths of the two branches are similar, thus making their corresponding resonant frequencies close to each other. The multiple resonant frequency points excited by the target antenna operating in the target frequency band include resonant frequency points with similar frequencies, including a first frequency point and a second frequency point, where the first frequency point and the second frequency point are adjacent, and the difference between the first frequency point and the second frequency point is less than a threshold.

[0083] The first metal part, acting as the main radiating stub, excites currents with the same transmission direction at two adjacent resonant frequencies in the resonant mode. The main radiating stub always has a common-mode current in phase at these two adjacent resonant frequencies. The radiation fields formed by these common-mode currents can be superimposed and enhanced, thereby improving the radiation efficiency of the main radiating stub in the frequency band of these two adjacent resonant frequencies. The second metal part, acting as the parasitic stub, excites currents with opposite transmission directions at these two adjacent resonant frequencies. The parasitic stub always has a differential-mode current in opposite phase at these two adjacent resonant frequencies. The radiation fields formed by these differential-mode currents cancel each other out, thus causing the reverse currents corresponding to the parasitic stubs at these two adjacent resonant frequencies to cancel each other out, thereby reducing the adverse effect of the parasitic stub on the radiation efficiency of the main radiating stub. The strip-shaped metal part provided in this embodiment serves as the radiator of the target antenna, extending bandwidth while maintaining radiation efficiency.

[0084] Optionally, taking the target frequency band of the target antenna as an example of the 2.4 GHz Wi-Fi band, the approximate dimensions of the two metal parts include a difference in dimensions not exceeding 1.25 mm. This difference in dimensions can be adjusted according to the operating frequency band of the target antenna. Taking the target frequency band of the target antenna as an example of the 2.4 GHz Wi-Fi band, the aforementioned threshold does not exceed 0.2 GHz. This threshold can be adjusted according to the operating frequency band of the target antenna. In this application, the dimension of the metal part refers to the length of the metal part in the first direction.

[0085] When the dimensions of the two metal parts meet the first condition, and the first and second radiating stubs are respectively used as the main radiating stub and the parasitic stub, adjacent resonant frequency points with a difference less than a threshold can be obtained: the first frequency point and the second frequency point. The frequency difference between these two resonant frequency points is less than the set threshold, and their frequencies are close enough to satisfy the current superposition condition of differential mode current cancellation at the parasitic stub and common mode current superposition at the main radiating stub. This allows the additional resonance brought by the parasitic stub to effectively expand the antenna bandwidth. At the same time, the reverse current of the parasitic stub can be canceled by the current synergy of the two adjacent frequency points. While enhancing the radiation efficiency of the main radiating stub, the radiation efficiency deterioration caused by the parasitic stub can be avoided, achieving the dual effect of improving antenna bandwidth and radiation efficiency.

[0086] Based on the above embodiments, some embodiments of this application, such as Figure 2 , Figure 4 or Figure 5 As shown, the grounding portion 106 further includes: a second grounding portion 1062, which is electrically connected between the first metal portion 1031 and the reference ground 108 of the electronic device, and the second grounding portion 1062 is close to the first edge of the strip metal member 103; and a third grounding portion 1063, which is electrically connected between the second metal portion 1032 and the reference ground 108 of the electronic device, and the third grounding portion 1063 is close to the second edge of the strip metal member 103 opposite to the first edge.

[0087] Both the first edge and the second edge extend along a first direction. For example... Figure 2 , Figure 4 or Figure 5 As shown, the first edge can be the lower edge of the strip metal part 103, and the second edge can be the upper edge of the strip metal part 103.

[0088] In electronic devices, by using the second grounding portion 1062 and the third grounding portion 1063, which are located near the opposite edges of the strip-shaped metal component, the electrical lengths of the first metal portion 1031 and the second metal portion 1032 can be constrained and adjusted respectively. This helps to excite multiple resonant modes in the high-frequency band and further broadens the high-frequency operating bandwidth of the target antenna. At the same time, it can ground the opposite ends of the strip-shaped metal component 103 in the first direction, further stabilize the overall potential of the strip-shaped metal component 103, suppress stray resonances caused by the suspension of the metal component, reduce the interference of the strip-shaped metal component 103 on the metal frame antenna of the electronic device, ensure the stability of the differential-mode and common-mode current distribution formed by the main radiating branches and parasitic branches, and help maintain the overall radiation performance of the target antenna.

[0089] Optionally, the direction from the first edge to the second edge is the second direction, in which case the first direction and the second direction can be perpendicular. The second grounding part 1062 and the third grounding part 1063 are arranged symmetrically with respect to the center of the first grounding part 1061, which makes the boundary conditions of the first metal part 1031 and the second metal part 1032 more symmetrical, better maintains the electrical length consistency of the two parts, facilitates obtaining adjacent resonant frequency points with frequency spacing that meet the threshold requirements, and ensures the stable realization of the working mechanism of parasitic stub differential mode current cancellation and main radiating stub common mode current superposition. At the same time, the symmetrical grounding layout of the second grounding part 1062 and the third grounding part 1063 can balance the grounding impedance of the strip metal part 103 at both ends in the first direction, suppress unnecessary spurious modes caused by asymmetrical grounding, improve the multi-resonance excitation effect of the target antenna in the target frequency band, and reduce interference to the adjacent metal frame antenna.

[0090] In the electronic device provided in this application embodiment, based on the feed section 105 and the ground section 106, a first metal portion 1031 serving as the main radiating branch and a second metal portion 1032 serving as the parasitic branch are formed in the strip-shaped metal member 103. This allows the target antenna to operate in the target frequency band, exciting multiple resonant modes at multiple frequency points to increase bandwidth and radiation performance, thereby improving radiation efficiency. The electronic device can rely on the cooperation of the feed section 105, the first ground section 1061, the second ground section 1062, and the third ground section 1063 to enable the first metal portion 1031 on the strip-shaped metal member 103 to work collaboratively as the main radiating branch and the second metal portion 1032 as the parasitic branch. This can excite multiple resonant modes within the target frequency band to increase the antenna's operating bandwidth. Simultaneously, by utilizing the synergistic effect of differential-mode and common-mode currents at adjacent frequency points in the integrated structure, the reverse current on the parasitic branch is canceled out, and the radiation of the main radiating branch is enhanced. This effectively improves antenna radiation performance while expanding bandwidth, overcoming the defect of traditional separate parasitic branch schemes where increased bandwidth is accompanied by decreased radiation efficiency.

[0091] Optionally, the second grounding part 1062 is opposite to the power supply part 105 along the second direction, and the third grounding part 1063 is opposite to the power supply part 105 along the first direction. The first direction and the second direction are perpendicular. Since the second grounding part 1062 and the third grounding part 1063 are centrally symmetrically arranged with respect to the first grounding part 1061, a transmission current perpendicular to the electrical length direction of the strip metal member 103 is formed between the second grounding part 1062 and the power supply part 105 to generate resonance at high frequency, thereby better expanding the bandwidth.

[0092] In the electronic device, the housing 100 includes a metal frame 112, and the electronic device also includes multiple frame antennas using the metal frame 112 as radiators. At least one of the multiple frame antennas supports a frequency band consistent with that supported by the target antenna. The cover 101 is fixed to the metal frame 112 by an insulating material. The strip-shaped metal piece 103 is not conductive to the metal frame 112. The outer surface of the strip-shaped metal piece 103 constitutes part of the outer surface of the cover 101. The third edge of the strip-shaped metal piece 103 belongs to the first side of the cover 101, and the fourth edge of the strip-shaped metal piece 103 belongs to the second side of the cover 101. The direction from the third edge to the fourth edge is the first direction. Figure 2 , Figure 4 or Figure 5 As shown, the left and right sides of the cover 101 can be the first and second sides of the cover 101, respectively, and the third and fourth edges of the strip metal piece 103 can be the left and right sides of the strip metal piece 103, respectively.

[0093] In this embodiment, the cover 101 is the rear shell of the electronic device, and the strip-shaped metal part 103 is a metal decorative part integrated on the rear shell. This allows the metal decorative part on a local area of ​​the original rear shell of the device to be directly reused as the radiator of the target antenna without the need to add an additional independent antenna radiating component, saving the limited layout space inside the device. It can also form an antenna clearance by taking advantage of the inherent spacing between the rear shell and the internal components, reducing the interference of internal components on the antenna radiation, ensuring that the aforementioned main radiating branches and parasitic branches form differential mode / common mode current cooperative operation, taking into account the dual effects of expanding bandwidth and improving radiation efficiency. This is conducive to realizing the thin and light design of the entire electronic device, reducing material and assembly costs, and also reducing interference with the metal frame antenna.

[0094] In one embodiment, the cover 101 of the electronic device includes an insulating cover that integrally covers the entire rear side of the electronic device, and a strip-shaped metal member 103 is bonded and fixed to a predetermined area on the inner surface of the insulating cover by an adhesive layer. The portion of the insulating cover corresponding to the strip-shaped metal member 103 and the stacked structure of the strip-shaped metal member 103 together constitute the appearance structure of the cover 101 in that portion.

[0095] In another embodiment, the cover 101 has a strip-shaped region made of metal, which serves as a strip-shaped metal element 103. In this case, the strip-shaped metal element 103 directly serves as the external structure of the cover 101 in the strip-shaped region.

[0096] In this embodiment, the strip-shaped metal piece 103 can be a metal cover plate for the camera module of the rear camera in the cover 101 of an electronic device. In this way, the same strip-shaped metal piece 103 can not only serve as a radiator of the target antenna, but also as a camera module cover plate and a metal exterior structural component of the rear shell.

[0097] The electronic device has a display panel on the side opposite to the cover 101. The electronic device has a first end and a second end, with the first end being the upper edge of the image displayed by the electronic device. The distance between the strip-shaped metal piece 103 and the first end is less than the distance between it and the second end; that is, the strip-shaped metal piece 103 is located in the rear shell area corresponding to the upper half of the screen portion of the electronic device, and is less affected by the user's hand grip. During the use of the electronic device, the strip-shaped metal piece 103 can be prevented from being gripped by the user's hand and affecting the communication performance of the target antenna.

[0098] The electronic device includes at least a metal frame antenna whose radiating element extends in a direction perpendicular to a first direction. For example, the first direction is parallel to a first reference direction X, and the metal frame antenna extends in a second reference direction Y. In this case, the radiating element of the metal frame antenna is perpendicular to the electrical length direction of the radiating element of the target antenna, and their current transmission directions are perpendicular, thereby giving the two antennas orthogonal current transmission directions. This improves the isolation between the target antenna and the metal frame antenna and reduces interference between the two antennas.

[0099] Taking mobile phones as an example, due to the thinness of current mobile phones, when the metal cover plate of the camera module is used as the antenna radiator, the clearance between the metal cover plate of the camera module and the metal shell of the camera module is small, which leads to a narrow antenna bandwidth. In order to cover the bandwidth required by the target frequency band, one resonant mode cannot meet the communication requirements. The embodiment provided in this application can excite multiple resonant modes on the strip metal part 103 of the integrated structure through the first grounding part 1061 in the grounding part 106. This can not only expand the antenna bandwidth, but also improve the antenna radiation efficiency.

[0100] Optionally, the target antenna can be a WIFI antenna. Since the strip metal part 103 itself has a large usable area, it is suitable as a radiator for a WIFI antenna; at the same time, this position can form an inherent clearance with the internal components, and with the grounding and feeding design, it can excite multiple sets of resonant modes to meet the bandwidth requirements of the 2.4G and 5G frequency bands.

[0101] The performance of the target antenna in the electronic device provided in this application will be explained below with reference to specific simulation experimental data.

[0102] refer to Figure 7 , Figure 7 This application provides a return loss curve for a target antenna in an electronic device. Figure 7 The horizontal axis represents frequency in GHz, and the vertical axis represents return loss in dBa. Figure 7 It shows Figure 2 The return loss curve of the target antenna in the electronic device shown is illustrated. Based on... Figure 7As shown in the return loss curve, the target antenna designed using the embodiment provided in this application can excite multiple resonant peaks in the 2GHz-6GHz frequency band. The multiple resonant peaks include the first resonant peak f1 to the sixth resonant peak f6, which can achieve good impedance matching between the 2.4G WIFI and 5G WIFI frequency bands. This indicates that the cooperative work of the two radiating branches of the integrated structure can effectively expand the antenna's operating bandwidth.

[0103] The first and second frequency points mentioned above can correspond to the frequencies of the first resonant peak f1 (approximately 2.4 GHz) and the second resonant peak f2 (approximately 2.6 GHz), respectively. By optimizing the design parameters of the grounding part 106, the frequency difference between the two resonant peaks can be reduced to a set threshold range.

[0104] refer to Figure 8 and Figure 9 , Figure 8 and Figure 9 The present application provides an embodiment of the resonant current distribution of a target antenna in the 2.4G WIFI band in an electronic device. Figure 8 and Figure 9 The middle arrow indicates the direction of resonant current propagation. For example... Figure 7 As shown, 2.4G Wi-Fi has two resonant frequencies, corresponding to the frequencies of the first resonant peak f1 and the second resonant peak f2, respectively. The resonant current distribution of the target antenna at the frequency of the first resonant peak f1 is shown in the figure. Figure 8 As shown, the resonant current distribution at the frequency of the second resonant peak f2 is as follows: Figure 9 As shown.

[0105] Combination Figure 2 , Figure 8 and Figure 9 As shown, the resonant circuits of the first metal part 1031 at the two resonant frequencies in the 2.4G WIFI band have the same transmission direction. Therefore, the radiation field of the first metal part 1031, which is the main radiation branch, can be enhanced based on the superposition of common-mode current, thereby improving the radiation efficiency of the main radiation branch. The resonant circuits of the second metal part 1032 at the two resonant frequencies in the 2.4G WIFI band have opposite transmission directions. Therefore, the radiation field of the second metal part 1032, which is the parasitic radiation branch, can cancel each other based on the differential-mode current, thereby reducing or even eliminating the influence of the parasitic radiation branch on the radiation efficiency of the main radiation branch.

[0106] like Figure 7 As shown, in the 5G WIFI band, the target antenna has four resonant frequency points, which correspond to the frequencies of the third resonant peak f3 to the sixth resonant peak f6, respectively.

[0107] refer to Figures 10-13 , Figures 10-13 The resonant current distribution of a target antenna in the 5G WIFI band in an electronic device provided in this application embodiment. Figures 10-13 The middle arrow indicates the direction of resonant current propagation. The resonant current distribution of the target antenna at the frequency of the third resonant peak f3 is shown below. Figure 10 As shown, the resonant current distribution at the frequency of the fourth resonant peak f4 is as follows: Figure 11 As shown, the resonant current distribution of the target antenna at the frequency of the fifth resonant peak f5 is as follows. Figure 12 As shown, the resonant current distribution at the frequency of the sixth resonant peak f6 is as follows: Figure 13 As shown.

[0108] Same as above regarding Figure 8 and Figure 9 Analysis and explanation, combined Figures 10-13 As shown in the resonant current distribution, in the 5G WIFI band, parasitic stubs can form differential mode currents between adjacent frequency points to cancel the influence on the radiation efficiency of the main radiating stubs, and the main radiating stubs can form common mode currents between adjacent frequency points to achieve superposition and enhancement of the radiation field, thereby improving the radiation efficiency.

[0109] refer to Figure 14 , Figure 14 The system efficiency curve of a target antenna provided in this application embodiment is shown, with the horizontal axis representing frequency / GHz and the vertical axis representing system efficiency / dBp. Based on Figure 14 It can be seen that the target antenna has high system efficiency in both the 2.4G WIFI band and the 5G WIFI band, and the system efficiency of both bands meets the communication requirements.

[0110] The various embodiments in this application are described in a progressive, parallel, or combined manner. Each embodiment focuses on its differences from other embodiments, and similar or identical parts between embodiments can be referred to interchangeably. The embodiments provided in this application can be combined with each other without contradiction.

[0111] It should be noted that, in the description of this application, the accompanying drawings and embodiments are illustrative rather than restrictive. The same reference numerals throughout the embodiments identify the same structures. Additionally, for understanding and ease of description, the thicknesses of some layers, films, panels, regions, etc., may be exaggerated in the drawings. It is also understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, the element may be directly on the other element or there may be intermediate elements. Furthermore, "on" means positioning an element on or below another element, but does not inherently mean positioning it above another element according to the direction of gravity.

[0112] The terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and for 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. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component positioned centrally in the middle.

[0113] It should also be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or apparatus comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or apparatus that includes the aforementioned element.

[0114] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electronic device, comprising: case; A cover body, which together with the housing defines an accommodating space, the cover body having a strip-shaped metal member extending along a first direction; Radio frequency circuitry is disposed within the accommodating space; The power supply unit is electrically connected between the radio frequency circuit and the strip-shaped metal component; A grounding portion is electrically connected between the strip-shaped metal member and the reference ground of the electronic device. The grounding portion includes a first grounding portion, which is disposed along a second direction on the inner surface of the strip-shaped metal member facing the receiving space. The strip-shaped metal member includes a first metal portion and a second metal portion located along the first direction and respectively on both sides of the first grounding portion. The second direction is different from the first direction. The strip-shaped metal part is the radiator of the target antenna, the first metal part is the first radiating branch of the target antenna, and the second metal part is the second radiating branch of the target antenna.

2. The electronic device according to claim 1, wherein the first grounding portion comprises one of the following: The first grounding portion is a strip-shaped conductor that extends along the second direction and is electrically connected between the strip-shaped metal piece and the reference ground. The first grounding portion includes a plurality of grounding conductors, which are electrically connected between the strip-shaped metal piece and the reference ground, and at least one of the plurality of grounding conductors is a strip-shaped conductor extending along the second direction; The first grounding part includes a plurality of grounding conductors, which are electrically connected between the strip-shaped metal piece and the reference ground, and the plurality of grounding conductors are arranged in a row at intervals along the second direction.

3. The electronic device according to claim 2, wherein the plurality of grounding conductors are arranged in a row at intervals along the second direction, including at least one strip conductor.

4. The electronic device according to claim 2 or 3, wherein the first side of the strip conductor is electrically contacted and adhered to the inner surface of the strip metal member, and the second side of the strip conductor opposite to the first side is electrically contacted and adhered to the conductor plate representing the reference ground of the electronic device.

5. The electronic device according to claim 4, wherein the feed section is electrically connected to the first metal section, the first radiating stub is the main radiating stub of the target antenna, and the second radiating stub is a parasitic stub of the target antenna, wherein... The first radiating stub and the second radiating stub are configured to cause the target antenna to operate at a target frequency band to excite multiple frequency resonant modes, the multiple frequency points being in-band of the target frequency band.

6. The electronic device according to claim 5, wherein the dimensions of the first metal portion and the second metal portion satisfy a first condition, the first condition including one of the following: having the same dimensions or having similar dimensions; The target antenna operates in the target frequency band to excite multiple frequency points in a resonant mode, including a first frequency point and a second frequency point. The first frequency point and the second frequency point are adjacent, and the difference between the first frequency point and the second frequency point is less than a threshold.

7. The electronic device according to claim 6, wherein the grounding portion further comprises: The second grounding portion is electrically connected between the first metal portion and the reference ground of the electronic device, and the second grounding portion is close to the first edge of the strip metal piece; A third grounding portion is electrically connected between the second metal portion and the reference ground of the electronic device, and the third grounding portion is located near the second edge of the strip metal member opposite to the first edge.

8. The electronic device according to claim 7, wherein the direction from the first edge to the second edge is the second direction, and the second grounding portion and the third grounding portion are symmetrically arranged with respect to the center of the first grounding portion.

9. The electronic device according to claim 8, wherein, based on the feed section and the ground section, a first metal portion as a main radiating branch and a second metal portion as a parasitic branch are formed in the strip-shaped metal member, such that the target antenna operates at the target frequency band to excite resonant modes at multiple frequency points, thereby increasing bandwidth and radiation performance.

10. The electronic device according to claim 1, wherein the housing includes a metal frame, and the electronic device further includes multiple frame antennas with the metal frame as radiators, wherein at least one frame antenna is capable of supporting a frequency band consistent with the frequency band supported by the target antenna; The cover is fixed to the metal frame by an insulating material, and the strip-shaped metal piece is not conductive to the metal frame; the outer surface of the strip-shaped metal piece constitutes part of the outer appearance surface of the cover, the third edge of the strip-shaped metal piece is part of the first side of the cover, and the fourth edge of the strip-shaped metal piece is part of the second side of the cover. The direction from the third edge to the fourth edge is the first direction.

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