electronic devices

Abstract

This application provides an electronic device. The electronic device includes a ground plane and an antenna assembly; the ground plane includes a first side and a second side that are bent and connected, the length of the first side being greater than the length of the second side; the antenna assembly includes a first antenna, the first antenna including a first radiator and a first feed source; at least a portion of the first radiator is disposed corresponding to the first side, the first radiator including a first main radiator and a first parasitic radiator, the first main radiator including a first end, a first feed point and a first coupling end disposed sequentially, the first parasitic radiator including a second coupling end and a second end disposed sequentially, the first feed source being electrically connected to the first feed point, exciting a first resonant mode to support a first sub-band of a first target frequency band, and a second resonant mode to support a second sub-band of the first target frequency band, the first and second sub-bands having different frequency ranges, the first resonant mode including the parasitic mode of the first parasitic radiator, and the second resonant mode including a zero-order mode.

Description

Technical Field

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

[0002] With technological advancements, mobile phones and other electronic devices with communication capabilities are becoming increasingly widespread and powerful. These devices typically include antenna components to enable their communication functions. However, the communication performance of antenna components in current electronic devices is not yet optimal and requires further improvement. Summary of the Invention

[0003] In a first aspect, one embodiment of this application provides an electronic device, the electronic device including a floor and an antenna assembly; the floor includes a first side and a second side bent and connected, wherein the length of the first side is greater than the length of the second side; the antenna assembly includes a first antenna, the first antenna comprising:

[0004] A first radiator, at least partially corresponding to the first side, comprises a first main radiator and a first parasitic radiator. The first main radiator includes a first end, a first feed point, and a first coupling end arranged sequentially. The first parasitic radiator includes a second coupling end and a second end arranged sequentially, the second coupling end being spaced apart from and coupled to the first coupling end, and the second end being grounded.

[0005] A first feed source is electrically connected to the first feed point, which excites a first resonant mode to support a first sub-band of the first target frequency band and excites a second resonant mode to support a second sub-band of the first target frequency band. The frequency range of the first sub-band is different from that of the second sub-band. The first resonant mode includes the parasitic mode of the first parasitic radiator, and the second resonant mode includes the zero-order mode.

[0006] In summary, the antenna assembly in the electronic device provided by the embodiments of this application has a first feed source electrically connected to the first feed point P, which excites a first resonant mode to support a first sub-band of the first target frequency band and excites a second resonant mode to support a second sub-band of the first target frequency band. The frequency range of the first sub-band is different from that of the second sub-band. Therefore, the antenna assembly in the electronic device provided by the embodiments of this application has a wider bandwidth in the first target frequency band. Furthermore, at least a portion of the first radiator is disposed corresponding to the first side; the first radiator includes a first end, a first feed point, and a first coupling end arranged sequentially, and the second coupling end of the first parasitic radiator is spaced apart from and coupled to the first coupling end of the first radiator; the second grounding end is grounded. Therefore, the first radiator and the first feed source of the antenna assembly can effectively excite the zero-order mode, thereby enabling the first antenna to have higher radiation efficiency in the second sub-band of the first target frequency band when supporting it. Therefore, the first antenna of the antenna assembly provided by the embodiments of this application has better communication performance in the first target frequency band. Attached Figure Description

[0007] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0008] Figure 1 This is a schematic diagram of the current distribution in the antenna components of a dipole antenna and electronic equipment.

[0009] Figure 2 A schematic diagram showing the distribution of the characteristic current with the largest proportion of longitudinal current corresponding to the characteristic mode of the floor.

[0010] Figure 3 for Figure 2 The diagram shows the weak current and strong current areas in the floor.

[0011] Figure 4 This is a schematic diagram of the ICE unit of an antenna assembly in related technologies;

[0012] Figure 5 This is a schematic diagram of the ICE unit in two implementation methods;

[0013] Figure 6 for Figure 5 The diagram shows the current distribution of the ICE unit in the two implementation methods provided.

[0014] Figure 7 for Figure 5 A comparative diagram of the radiation efficiency of the ICE unit in the two embodiments provided in the figure;

[0015] Figure 8 A schematic diagram of an antenna assembly provided according to one embodiment of this application;

[0016] Figure 9 for Figure 8 A partial structural diagram of the antenna assembly provided in the document;

[0017] Figure 10 for Figure 8 The diagram shows the first resonant current distribution corresponding to the first resonant mode of the antenna assembly shown.

[0018] Figure 11 for Figure 8 A schematic diagram of the resonant current distribution corresponding to the second resonant mode of the antenna assembly shown in the figure;

[0019] Figure 12 A schematic diagram of an antenna assembly provided according to one embodiment of this application;

[0020] Figure 13 for Figure 12 A partial structural diagram of the antenna assembly provided in the document;

[0021] Figure 14 for Figure 12 A schematic diagram of the second sub-resonant current distribution corresponding to the second sub-mode of the antenna assembly shown in the figure;

[0022] Figure 15 for Figure 13 A schematic diagram showing partial dimensions of the first radiator in the antenna assembly shown;

[0023] Figure 16 for Figure 12 The diagram shows the distribution of the third resonant current corresponding to the third resonant mode of the antenna assembly shown.

[0024] Figure 17 for Figure 16 The diagram shows the S-parameters corresponding to the first resonant mode, second resonant mode, and third resonant mode of the first target frequency band in the antenna assembly shown.

[0025] Figure 18 for Figure 12 A detailed schematic diagram of the antenna assembly shown;

[0026] Figure 19 for Figure 12 A schematic diagram of the first resonant current corresponding to the first resonant mode of the provided antenna assembly;

[0027] Figure 20 for Figure 12 A schematic diagram of the second resonant current corresponding to the second resonant mode of the provided antenna assembly;

[0028] Figure 21 for Figure 12 A schematic diagram of the third resonant current corresponding to the third resonant mode of the provided antenna assembly;

[0029] Figure 22 A schematic diagram of an antenna assembly provided in another embodiment of this application;

[0030] Figure 23 for Figure 22 Detailed schematic diagram of the antenna components;

[0031] Figure 24 A schematic diagram showing the dimensions of various parts of the first radiator when the antenna assembly provided in one embodiment of this application is applied to an electronic device;

[0032] Figure 25 A schematic diagram showing the grounding point electrically connected to the ground in an antenna assembly provided for another embodiment;

[0033] Figure 26 for Figure 22 The diagram shows the S-parameter curves of the antenna assembly.

[0034] Figure 27 A comparative diagram of an antenna assembly provided in one embodiment of this application and an antenna assembly in related technologies;

[0035] Figure 28 A schematic diagram of an electronic device provided according to one embodiment of this application;

[0036] Figure 29 for Figure 28 A partial structural diagram of the electronic device provided in the document;

[0037] Figure 30 A schematic diagram of an electronic device provided according to another embodiment of this application;

[0038] Figure 31 for Figure 30 A partial structural diagram of the electronic device provided in the document.

[0039] Explanation of key component designations:

[0040] Electronic device 1, side 1a, bottom 1b, antenna assembly 10, front shell 30, display screen 40, back cover 50, USB interface 60;

[0041] First antenna 100, first radiator 110, first main radiator 111, first radiating part 111a, second radiating part 111b, first end 1111, first feed point P1, grounding point G1, first coupling end 1112, reference point O1, radius R, first parasitic radiator 112, second coupling end 1121, second end 1122, first feed source S1;

[0042] Second antenna 200, second radiator 210, second main radiator 211, third end 2111, second feed point P2, third coupling end 2112, second parasitic radiator 212, fourth coupling end 2121, fourth end 2122, second feed source S2.

[0043] The frame body is 310, and the frame part is 320;

[0044] First resonant current I1, second resonant current I2, third resonant current I3, first sub-resonant current I21, second sub-resonant current I22. Detailed Implementation

[0045] The technical solution of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the embodiments described in this application are only a part of the embodiments, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without creative effort are within the protection scope of this application.

[0046] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment to other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0047] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a particular order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, an assembly or device comprising one or more components is not limited to the one or more components listed, but may optionally also include one or more components not listed but inherent to the exemplified product, or one or more components that it should have based on the described function.

[0048] Before introducing the antenna assembly 10 provided in the embodiments of this application, some principles applied to the antenna assembly 10 provided in the embodiments of this application will be introduced. It should be understood that the introduction of some principles applied to the antenna assembly 10 in the embodiments of this application should not be construed as the antenna assembly 10 provided in the embodiments of this application being prior art.

[0049] Please see Figure 1 , Figure 1 This is a schematic diagram showing the current distribution of an antenna assembly in a dipole antenna and electronic device. Among them, Figure 1 (A) in the image is in color. Figure 1 (B) in the middle is Figure 1 (A) Grayscale image in the image. Figure 1 (a) in the diagram is a schematic diagram of the current distribution of the dipole antenna; Figure 1 (b) in the diagram is a schematic diagram of the current distribution after widening one of the radiating arms of a dipole antenna; Figure 1 (c) in the diagram is a schematic diagram of the current distribution after the radiating arm of a dipole antenna is widened; Figure 1 (d) in the diagram is a schematic diagram of the current distribution of the antenna assembly 10 of an electronic device 1 provided in one embodiment. Figure 1 In the middle, the feed point of the dipole antenna is biased. From Figure 1 As can be seen from (a) to (d), one radiating arm of the dipole antenna gradually widens. Therefore, the ground plane 120 of the antenna assembly 10 in the electronic device 1 can be considered equivalent to one radiating arm of the dipole antenna. Specifically, the ground plane 120 in the antenna assembly 10 of the electronic device 1 can be regarded as an antenna element with a certain width in the dipole antenna. Thus, the ground plane 120 and the radiator are like a dipole antenna with a biased feed point.

[0050] When the antenna assembly 10 is applied to an electronic device 1 such as a mobile phone, the longitudinal dimension (length) and lateral dimension (width) of the electronic device 1 are approximately 155mm × 75mm. For low-frequency bands, the longitudinal dimension of the electronic device 1 is approximately one-quarter of the wavelength of the low-frequency band. According to the basic principle of dipole antennas, that is, by fully exciting the longitudinal current of the ground plane 120, the equivalent aperture of the dipole antenna can be increased, and the efficiency can be improved.

[0051] In this embodiment, the ground plane 120 of the antenna assembly 10 can be, but is not limited to, the ground plane in a circuit board; for example, the circuit board is a motherboard. Characteristic modes are inherent modes that characterize the ground plane 120. By analyzing the characteristic modes (also called feature modes) of the ground plane 120, the most suitable feed location can be found based on boundary conditions. The following explanation uses a low-frequency band as an example, where the first target frequency band supported by the antenna assembly 10 is a low-frequency band. Simulations can obtain the characteristic current with the largest proportion of longitudinal current modes. Please refer to [further details omitted]. Figure 2 and Figure 3 , Figure 2 A schematic diagram showing the distribution of the characteristic current with the largest proportion of longitudinal current corresponding to the characteristic mode of the floor. Figure 3 for Figure 2 The diagram shows the areas of weak current and strong current in the floor. Figure 2 (a) in the image is in color. Figure 2 (b) in the middle is Figure 2 (a) Grayscale image. Accordingly, Figure 3 (a) in the image is in color. Figure 3 (b) in the middle is Figure 3 (a) Grayscale image. The current distribution of the characteristic mode is mainly characterized by the sinusoidal behavior of the edges of the ground plane 120, by... Figure 2 It can be seen that the characteristic modulus has a maximum and minimum current distribution at a specific location. In addition to the current distribution, the voltage distribution, i.e., the electric field distribution on the ground plane 120, can also be considered. The phase difference between the electric field distribution and the current distribution in the ground plane 120 is 90°. That is, the minimum value of the electric field distribution in the ground plane 120 is the same as the maximum value of the current distribution in the ground plane 120; conversely, the maximum value of the electric field distribution in the ground plane 120 is the same as the minimum value of the current distribution in the ground plane 120. Figure 2 In the diagram, curve J next to ground plane 120 represents the current distribution of ground plane 120, and curve V represents the voltage distribution of ground plane 120. Curve J indicates that the current distribution of ground plane 120 is sinusoidal; it can be seen from curve J that the two ends of ground plane 120 have the minimum current, and the middle position of ground plane 120 has the maximum current. Curve V indicates that the electric field distribution of ground plane 120 is cosine. Therefore, an inductive coupling element (ICE) can be placed at the position of maximum characteristic mode current distribution of ground plane 120 (i.e., the position of minimum electric field distribution of ground plane 120) to excite the characteristic mode; alternatively, a capacitive coupling element (CCE) can be placed at the position of minimum characteristic mode current distribution of the circuit board (i.e., the position of maximum electric field distribution of the circuit board) to excite the characteristic mode.

[0052] The floor 120 has a first side 120a and a second side 120b. The second side 120b is bent and connected to the first side 120a, and the length of the second side 120b is less than the length of the first side 120a. Therefore, in Figure 3 In the diagram, the first side 120a is the long side of the floor 120, and the second side 120b is the short side of the floor 120.

[0053] To achieve higher radiation efficiency, it is necessary to better excite the longitudinal current of the floor 120, that is, to excite the longitudinal current of the floor 120. Figure 2 The resonant current shown is along the extension direction of the long side (i.e., the first side 120a) of the floor 120.

[0054] CCE elements are typically small in size, making them suitable as excitation units for miniaturization purposes, reducing the size of the antenna radiator without sacrificing antenna efficiency. To improve the antenna performance of the antenna assembly 10, the antenna assembly 10 provided in this embodiment selects ICE elements as the excitation unit. Furthermore, by Figure 3 It is evident that, in order to effectively excite the longitudinal current of the ground plane 120, typically four CCE units and two ICE units are required. The positions of the CCE units are marked as 12a in the figure; the positions of the ICE units are marked as 12b in the figure. Therefore, to effectively excite the longitudinal current of the ground plane 120, a relatively small number of ICE units are required, making it easy to implement. Furthermore, ICE units are driven by inductive coupling, have a large size and aperture, and high self-radiation efficiency. The antenna assembly 10 provided in the embodiments of this application uses ICE units as excitation units.

[0055] Please see Figure 4 , Figure 4 This is a schematic diagram of the ICE unit of an antenna assembly in related technologies. Figure 4 In the ICE unit 150, the feed point of the feed source S is located in the middle of the radiator, and is fed from one radiating arm 150a to the other radiating arm 150b. Therefore, when Figure 4 The feeding position and form of the antenna assembly 10 are difficult to implement in the overall design of the electronic device in which the antenna assembly 10 is used. This is even more difficult to achieve when the electronic device 1 uses a metal frame or front shell 30 as the radiator. Figure 4 ICE Unit 150.

[0056] Please see Figure 5 , Figure 5 This is a schematic diagram of the ICE unit in two implementation methods. Wherein, Figure 5 (a) is a schematic diagram of an ICE unit 150 provided in one embodiment; Figure 5 (b) is a schematic diagram of an ICE unit 150 provided in another embodiment. Figure 5 In both embodiments of the ICE unit 150 provided, the feed point P0 of the antenna assembly 10 is located at the edge of the radiator. Figure 5 The ICE unit 150 provided in (a) includes a radiator 151, which has a relatively short length. Figure 5The radiator 151 of the ICE unit 150 provided in (b) includes a main branch 1511 and a parasitic branch 1512, with the parasitic branch 1512 spaced apart from the main branch 1511 and having a coupling gap. Figure 5 (a) and Figure 5 As can be seen in (b), Figure 5 In (a), the length of radiator 151 is less than Figure 5 The sum of the lengths of the main branch 1511 and the parasitic branch 1512 in (b) (i.e.) Figure 5 (b) The length of the radiator 151 in the middle, therefore, is also called Figure 5 The ICE unit 150 shown in (a) is a small-sized ICE, referred to as... Figure 5 The ICE unit 150 shown in (b) is a large-size ICE.

[0057] Please continue reading. Figure 5 In (b) of the diagram, the parasitic stub 1512 and the main stub 1511 are spaced apart to form a coupling capacitor, which is connected in series in the antenna assembly 10, causing the frequency band supported by the antenna assembly 10 to be too high. Therefore, in order to adjust the frequency of the frequency band supported by the antenna assembly 10, it is necessary to lengthen the entire radiator 151 (i.e., the main stub 1511 and the parasitic stub 1512). Lengthening the entire radiator 151 is equivalent to increasing the aperture of the antenna, resulting in better antenna performance of the antenna assembly 10.

[0058] Please refer to the following: Figure 5 , Figure 6 and Figure 7 , Figure 6 for Figure 5 The diagram shows the current distribution of the ICE unit in the two implementation methods provided. Figure 7 for Figure 5 The diagram below shows a comparison of the radiation efficiency of the ICE unit in two embodiments provided. Figure 6 (a) in the middle is Figure 5 The current distribution diagram of the ICE unit 150 shown in (a) is shown in the figure; Figure 6 (b) in the middle is Figure 5 The current distribution diagram of ICE unit 150 shown in (b) is provided below. For current information, please refer to [link / reference]. Figure 6 As shown by the dashed line in the image. Figure 6 When performing simulation, Figure 5 The two ICE units 150 shown have the same resonant frequency. Figure 5 and Figure 6 visible, Figure 5The length of the ICE unit 150 shown in (b) is closer to the longitudinal length of the ground plane 120 (such as the ground plane 120 in the motherboard), thus enabling better excitation of the longitudinal current of the ground plane 120. Figure 7 In the diagram, the horizontal axis represents frequency in GHz, and the vertical axis represents dB. Curve ① is... Figure 5 The S11 parameter curve of ICE unit 150 shown in (b) is shown in Figure 2; curve 2 is... Figure 5 (a) shows the S11 parameter curve of ICE unit 150; curve ③ is... Figure 5 (b) shows the system radiation efficiency curve of ICE unit 150; curve ④ is... Figure 5 The system radiation efficiency curve of ICE cell 150 is shown in (a) of the figure. As can be seen from this simulation diagram, Figure 5 The ICE unit 150 shown in (a) is... Figure 5 The ICE unit 150 shown in (b) has the same resonant frequency. Compared to Figure 5 Regarding the system radiation efficiency of ICE unit 150 in (a) of the diagram, Figure 5 The system radiation efficiency of the ICE unit 150 in (b) is significantly improved. The embodiments of this application will... Figure 5 The high-performance mode of the floor 120 excited by the ICE unit 150 shown in (b) is called the zero-order mode.

[0059] Next, based on the principle of the antenna assembly 10 introduced above, the antenna assembly 10 provided in the embodiments of this application will be described in detail.

[0060] Please refer to the following: Figure 28 , Figure 29 , Figure 8 and Figure 9 , Figure 8 A schematic diagram of an antenna assembly provided according to one embodiment of this application; Figure 9 for Figure 8A partial structural schematic diagram of the antenna assembly provided is shown. The electronic device 1 includes a ground plane 120 and an antenna assembly 10. The ground plane 120 includes a first side 120a and a second side 120b that are bent and connected, wherein the length of the first side 120a is greater than the length of the second side 120b. The antenna assembly 10 includes a first antenna 100. The first antenna 100 includes a first radiator 110 and a first feed source S1. At least a portion of the first radiator 110 is disposed corresponding to the first side 120a. The first radiator 110 includes a first main radiator 111 and a first parasitic radiator 112. The first main radiator 111 includes a first end 1111, a first feed point P1, and a first coupling end 1112 arranged sequentially. The first parasitic radiator 112 includes a second coupling end 1121 and a second end 1122 arranged sequentially. The second coupling end 1121 is spaced apart from and coupled to the first coupling end 1112, and the second end 1122 is grounded. The first feed source S1 is electrically connected to the first feed point P1, exciting a first resonant mode to support a first sub-band of the first target frequency band, and exciting a second resonant mode to support a second sub-band of the first target frequency band. The frequency range of the first sub-band is different from that of the second sub-band. The first resonant mode includes the parasitic mode of the first parasitic radiator 112, and the second resonant mode includes a zero-order mode.

[0061] The floor 120 can be, but is not limited to, the ground of a circuit board (such as a motherboard), or the mid-frame of the electronic device 1.

[0062] The first side 120a and the second side 120b are bent and connected. The connection between the first side 120a and the second side 120b can be an arc or a right angle. This application does not limit the shape of the connection between the first side 120a and the second side 120b.

[0063] In this embodiment, the length of the first side 120a is greater than the length of the second side 120b. Therefore, the first side 120a is also called the long side, and the second side 120b is also called the short side.

[0064] At least a portion of the first radiator 110 is disposed corresponding to the first side 120a to excite a zero-order mode. The first main radiator 111 can be a laser direct structuring (LDS) radiator, or a flexible printed circuit (FPC) radiator, or a printed direct structuring (PDS) radiator, or a metal dendrite radiator. When the antenna assembly 10 is applied to electronic device 1 (see [link to electronic device]), Figures 28 to 31In this case, the first main radiator 111 can be a mechanical design antenna (MDA) radiator designed using the embedded metal of the electronic device 1 itself. For example, the first main radiator 111 can be an antenna radiator designed using the plastic and metal frame of the electronic device 1. In addition, the first main radiator 111 can also be a metal frame antenna radiator designed with a metal frame.

[0065] The first parasitic radiator 112 can be a laser direct structuring (LDS) radiator, a flexible printed circuit (FPC) radiator, a printed direct structuring (PDS) radiator, or a metal stub radiator. When the antenna assembly 10 is applied to the electronic device 1, the first parasitic radiator 112 can be a mechanical design antenna (MDA) radiator designed using the embedded metal of the electronic device 1 itself. For example, the first parasitic radiator 112 can be an antenna radiator designed using the plastic and metal frame of the electronic device 1. In addition, the first parasitic radiator 112 can also be a metal frame antenna radiator designed with a metal frame. The first parasitic radiator 112 and the first main radiator 111 can be of the same or different types, and this application does not limit this.

[0066] The second coupling end 1121 is spaced apart from the first coupling end 1112. Therefore, the first main radiator 111 and the first parasitic radiator 112 can be equivalent to parallel-plate capacitors. The distance D1 between the second coupling end 1121 and the first coupling end 1112 satisfies: D1 ≤ 2 mm. When the distance D1 between the second coupling end 1121 and the first coupling end 1112 satisfies: D1 ≤ 2 mm, the equivalent capacitance between the first parasitic radiator 112 and the first main radiator 111 is less than or equal to 3 pF. When the distance D1 between the second coupling end 1121 and the first coupling end 1112 satisfies: D1 ≤ 2 mm, the coupling effect between the first parasitic radiator 112 and the first main radiator 111 is good.

[0067] The second end 1122 can be electrically connected to the floor 120 by, but not limited to, a grounding element (such as a conductive spring, conductive adhesive, conductive screw, or connecting bar).

[0068] The first feed source S1 can be electrically connected to the first feed point P1 via an electrical connector (e.g., a conductive spring, conductive adhesive, or conductive screw).

[0069] As described in the antenna assembly 10, the first radiator 110 and the first feed source S1 in the antenna assembly 10 provided in this embodiment are inductive coupling elements (ICE), also known as ICE units. The ICE units are used to excite the zero-order mode of the ground plane 120. Specifically, as described above, the first feed source S1 is electrically connected to the first feed point P1, exciting the second resonant mode, which includes the zero-order mode.

[0070] The first feed source S1 is electrically connected to the first feed point P1, exciting the first resonant mode to support the first sub-band of the first target frequency band, and exciting the second resonant mode to support the second sub-band of the first target frequency band. The frequency range of the first sub-band is different from that of the second sub-band. This difference includes: the frequency ranges of the first and second sub-bands being partially different and partially overlapping; or the frequency ranges of the first and second sub-bands being completely different. Because the frequency ranges of the first and second sub-bands are different, the bandwidth of the first target frequency band is wider. Furthermore, the second resonant mode includes the zero-order mode. As described above, the second resonant mode includes the zero-order mode; therefore, the system radiation efficiency is higher when the antenna assembly 10 supports the second sub-band of the first target frequency band.

[0071] In one embodiment, the first target frequency band can be, but is not limited to, a low-frequency band. Since the frequency range of the first sub-frequency band is different from that of the second sub-frequency band, when the first target frequency band is a low-frequency band, the first sub-frequency band and the second sub-frequency band can be two sub-frequency bands with different frequency ranges within the low-frequency band.

[0072] In summary, the antenna assembly 10 in the electronic device 1 provided in this application embodiment has the first feed source S1 electrically connected to the first feed point P1, exciting a first resonant mode to support a first sub-band of the first target frequency band and exciting a second resonant mode to support a second sub-band of the first target frequency band. The frequency range of the first sub-band is different from that of the second sub-band. Therefore, the antenna assembly 10 in the electronic device 1 provided in this application embodiment has a wider bandwidth in the first target frequency band. Furthermore, at least a portion of the first radiator 110 is disposed corresponding to the first side 120a; the first radiator 110 includes a first end 1111, a first feed point P1, and a first coupling end 1112 arranged sequentially, the second coupling end 1121 of the first parasitic radiator 112 is spaced apart from and coupled to the first coupling end 1112 of the first radiator 110, and the second ground end is grounded; therefore, the first radiator 110 and the first feed S1 of the antenna assembly 10 constitute an ICE unit, which can effectively excite the zero-order mode, thereby enabling the first antenna 100 to have high radiation efficiency in the second sub-band of the first target frequency band when supporting the second sub-band of the first target frequency band. Therefore, the first antenna 100 of the antenna assembly 10 provided in this application embodiment has good communication performance in the first target frequency band.

[0073] Please refer to the following: Figure 8 and Figure 10 , Figure 10 for Figure 8 The diagram shows the first resonant current distribution corresponding to the first resonant mode of the antenna assembly. In this embodiment, the first resonant mode includes a quarter-wavelength mode from the second coupling terminal 1121 to the second terminal 1122, and the first resonant mode is used to support a first sub-band of the first target frequency band.

[0074] Since the first resonant mode includes a quarter-wavelength mode from the second coupling terminal 1121 to the second ground terminal, utilizing the entire branch of the first parasitic radiator 112, the first resonant mode is also called a parasitic mode. For ease of description, the resonant current supporting the first sub-frequency band in the first resonant mode is named the first resonant current I1. The first resonant mode includes a quarter-wavelength mode from the second coupling terminal 1121 to the second terminal 1122; therefore, the first resonant current I1 is distributed between the second coupling terminal 1121 and the second terminal 1122. Figure 10As shown in the current half-wavelength period, the first resonant current I1 flows from the second coupling terminal 1121 to the second coupling terminal 1122. It can be understood that the first resonant current I1 is periodically changing; in the next half-wavelength period, the first resonant current I1 flows from the second coupling terminal 1122 to the second coupling terminal 1121.

[0075] It should be noted that the "wavelength" in the quarter-wavelength mode of the first resonant mode, which includes the second coupling terminal 1121 to the second terminal 1122, refers to the wavelength corresponding to the center frequency (also known as the center frequency point) of the first sub-band.

[0076] The quarter-wavelength mode, also known as the fundamental mode, has good radiation efficiency. The first resonant mode includes the quarter-wavelength mode from the second coupling terminal 1121 to the second terminal 1122. The first resonant mode is used to support the first sub-band of the first target frequency band; therefore, it can also be said that the fundamental mode of the first parasitic stub supports the first sub-band. The first antenna 100 has high radiation efficiency in the first sub-band.

[0077] For further information, please refer to [link / reference]. Figure 9 The physical length of the first parasitic radiator 112 satisfy: in, λ is the ratio of the propagation time of the electromagnetic wave signal of the first target frequency band in the medium surrounding the first radiator to the propagation time of the electromagnetic wave signal of the first target frequency band in free space, given the same physical length. Specifically, for the same physical length of medium and free space, 'a' is the propagation time of the electromagnetic wave signal of the first target frequency band in the medium surrounding the first radiator 110, 'b' is the propagation time of the electromagnetic wave signal of the first target frequency band in free space, and λ... 10 The wavelength is the wavelength corresponding to the center frequency of the first target frequency band.

[0078] For example, when the first radiator 110 is wrapped in a plastic or ceramic package, the medium includes the package.

[0079] The physical length of the first parasitic radiator 112 satisfies: Therefore, the first parasitic radiator 112 can better support the first sub-frequency band, so that the first antenna 100 of the antenna assembly 10 has better antenna performance in the first sub-frequency band.

[0080] In one implementation, please refer to... Figure 10 The electric length L of the first parasitic radiator 112 EF satisfy: Where, λ 11 The wavelength is the wavelength corresponding to the center frequency of the first sub-band.

[0081] The electric length L of the first parasitic radiator 112 EF It can be, but is not limited to, for or or

[0082] The electric length L of the first parasitic radiator 112 EF satisfy: When the first resonant mode is generated, it can be well matched with the electrical length required by the quarter-wavelength mode from the second coupling end 1121 to the second end 1122, and can be well excited on the first parasitic radiator 112 to generate the first resonant mode (including the quarter-wavelength mode from the second coupling end 1121 to the second end 1122), so that the first sub-band supported by the first resonant mode has good antenna performance.

[0083] Please see Figure 11 , Figure 11 for Figure 8 The diagram shows the resonant current distribution corresponding to the second resonant mode of the antenna assembly. The second resonant mode is a zero-order mode, and the second sub-resonant mode includes a first sub-mode and a second sub-mode. The first sub-mode is a half-wavelength mode along the extension direction of the ground plane 120 along the first side 120a, and the second sub-mode includes a half-wavelength mode from the first feed point P1 to the first coupling end 1112 and from the second coupling end 1121 to the second end 1122.

[0084] For ease of description, the resonant current corresponding to the second resonant mode is named the second resonant current I2. The resonant current when the first sub-mode supports the second sub-frequency band is named the first sub-resonant current I21. The resonant current corresponding to the second sub-resonant mode is named the second sub-resonant current I22. The first sub-mode is a half-wavelength mode of the floor 120 along the extension direction of the first side 120a; therefore, the first sub-resonant current I21 is distributed on the floor 120 and extends along the extension direction of the first side 120a. Figure 11The current half-wavelength period shown is illustrated by taking the example of the first sub-resonant current I21 extending along the extension direction of the first side 120a and flowing in a direction away from the second side 120b; the second sub-resonant current I22 flows from the second end 1122 to the second coupling end 1121, and from the first coupling end 1112 to the first feed point P1. It can be understood that the first sub-resonant current I21 changes periodically. In the next half-wavelength period, the first sub-resonant current I21 extends along the extension direction of the first side 120a and flows towards the second side 120b; correspondingly, the second sub-resonant current I22 flows from the first feed point P1 to the first coupling end 1112, and from the second coupling end 1121 to the second end 1122.

[0085] It should be noted that the "wavelength" in the first sub-mode, which is the half-wavelength mode of the extension direction of the floor 120 along the first side 120a, refers to the wavelength corresponding to the center frequency (also known as the center frequency point) of the second sub-band.

[0086] The "wavelength" in the half-wavelength mode from the first feed point P1 to the first coupling terminal 1112 and from the second coupling terminal 1121 to the second terminal 1122 refers to the wavelength corresponding to the center frequency (also known as the center frequency point) of the second sub-band.

[0087] The first sub-mode is a half-wavelength mode of the ground plane 120 along the extension direction of the first side 120a. As described above, the frequency band supported by the zero-order mode has high system radiation efficiency. The antenna assembly 10 provided in this application, in which the first sub-mode is a half-wavelength mode of the ground plane 120 along the extension direction of the first side 120a, supports a second sub-band of the first target frequency band. Therefore, the second sub-band has good system radiation efficiency.

[0088] Further, in one embodiment, the frequency of the first sub-frequency band is greater than the frequency of the second sub-frequency band. Specifically, the frequency of the first sub-frequency band being greater than the frequency of the second sub-frequency band includes the following situations: the maximum frequency of the first sub-frequency band is greater than the maximum frequency of the second sub-frequency band, and the frequency ranges of the first sub-frequency band and the second sub-frequency band partially overlap; or, the maximum frequency of the first sub-frequency band is greater than the maximum frequency of the second sub-frequency band, and the frequency ranges of the first sub-frequency band and the second sub-frequency band do not overlap. This application does not limit whether the frequencies of the first and second sub-frequency bands partially overlap; as long as the maximum frequency of the first sub-frequency band is greater than the maximum frequency of the second sub-frequency band, it is considered that the frequency of the first sub-frequency band is greater than the frequency of the second sub-frequency band.

[0089] As can be seen from the foregoing, the antenna assembly 10 provided in this application has a high system radiation efficiency when the first sub-mode of the second resonant mode supports the second sub-band of the first target frequency band.

[0090] Furthermore, the first resonant mode is used to support a first sub-band of the first target frequency band. This first resonant mode includes a quarter-wavelength mode from the second coupling terminal 1121 to the second ground terminal, utilizing the entire branch of the first parasitic radiator 112. Therefore, the first resonant mode is also called a parasitic mode. The parasitic mode has an efficiency dip when supporting the first sub-band. Since the frequency of the first sub-band is higher than the frequency of the second sub-band, the adverse effects of the efficiency dip of the first sub-band on the second sub-band can be reduced or even avoided.

[0091] Please refer to the following: Figure 28 , Figure 29 , Figure 12 , Figure 13 and Figure 14 , Figure 12 A schematic diagram of an antenna assembly provided according to one embodiment of this application; Figure 13 for Figure 12 A partial structural diagram of the antenna assembly provided in the document; Figure 14 for Figure 12The diagram shows the second sub-resonant current distribution corresponding to the second sub-mode of the antenna assembly. The electronic device 1 includes a ground plane 120 and an antenna assembly 10. The ground plane 120 includes a first side 120a and a second side 120b that are bent and connected, wherein the length of the first side 120a is greater than the length of the second side 120b. The antenna assembly 10 includes a first antenna 100. The first antenna 100 includes a first radiator 110 and a first feed source S1. At least a portion of the first radiator 110 is disposed corresponding to the first side 120a. The first radiator 110 includes a first main radiator 111 and a first parasitic radiator 112. The first main radiator 111 includes a first end 1111, a first feed point P1, and a first coupling end 1112 arranged sequentially. The first parasitic radiator 112 includes a second coupling end 1121 and a second end 1122 arranged sequentially. The second coupling end 1121 is spaced apart from and coupled to the first coupling end 1112, and the second end 1122 is grounded. The first feed source S1 is electrically connected to the first feed point P1, exciting a first resonant mode to support a first sub-band of the first target frequency band, and exciting a second resonant mode to support a second sub-band of the first target frequency band. The frequency range of the first sub-band is different from that of the second sub-band. The first resonant mode includes the parasitic mode of the first parasitic radiator 112, and the second resonant mode includes a zero-order mode.

[0092] The first feed source S1 is electrically connected to the first feed point P1, exciting the first resonant mode to support the first sub-band of the first target frequency band, and exciting the second resonant mode to support the second sub-band of the first target frequency band. The frequency range of the first sub-band is different from that of the second sub-band. This difference includes: the frequency ranges of the first and second sub-bands being partially different and partially overlapping; or the frequency ranges of the first and second sub-bands being completely different. Because the frequency ranges of the first and second sub-bands are different, the bandwidth of the first target frequency band is wider. Furthermore, the second resonant mode includes the zero-order mode. As described above, the second resonant mode includes the zero-order mode; therefore, the system radiation efficiency is higher when the antenna assembly 10 supports the second sub-band of the first target frequency band.

[0093] Furthermore, the first main radiator 111 has a grounding point G1. The grounding point G1 is located between the first feed point P1 and the first coupling terminal 1112, and is grounded. The second resonant mode includes a first sub-mode and a second sub-mode. The first sub-mode is a half-wavelength mode along the extension direction of the ground plane 120 along the first side 120a. The second sub-mode includes a half-wavelength mode from the grounding point G1 to the first coupling terminal 1112 and from the second coupling terminal 1121 to the second terminal 1122; the second sub-mode and the first sub-mode together support the second sub-band.

[0094] The location of the grounding point G1 will be described in detail later. The grounding point G1 can be grounded via, but is not limited to, through the alloy of the front housing 30 (also called the middle frame), or via a screw-locked spring clip, or by adding an additional small plate and grounding via the spring clip. The antenna assembly 10 provided in this application does not limit the grounding method of the grounding point.

[0095] For ease of description, the resonant current corresponding to the second resonant mode is named the second resonant current I2. The resonant current when the first sub-mode supports the second sub-frequency band is named the first sub-resonant current I21. The resonant current when the second sub-mode supports the second sub-frequency band is named the second sub-resonant current I22.

[0096] The second sub-mode includes a half-wavelength mode from the ground point G1 to the first coupling terminal 1112 and from the second coupling terminal 1121 to the second terminal 1122. Therefore, the second resonant current I2 corresponding to the second sub-mode is distributed between the ground terminal of the first main radiator 111 and the first coupling terminal 1112, and distributed in the stub of the first parasitic radiator 112.

[0097] exist Figure 14 The current half-wavelength period is illustrated by taking the second sub-resonant current I22 flowing from the second terminal 1122 to the second coupling terminal 1121 and from the first coupling terminal 1112 to the grounding point G1 as an example. It can be understood that the second sub-resonant current I22 changes periodically; in the next half-wavelength period, the second sub-resonant current I22 flows from the grounding point G1 to the first coupling terminal 1112 and from the second coupling terminal 1121 to the second terminal 1122.

[0098] It should be noted that the "wavelength" in the second sub-mode, which includes the half-wavelength mode from the grounding point G1 to the first coupling terminal 1112 and the second coupling terminal 1121 to the second terminal 1122, refers to the wavelength corresponding to the center frequency (also known as the center frequency point) of the second sub-band.

[0099] It should be noted that the first sub-resonant current I21 on the floor 120 and the second sub-resonant current I22 of the first radiator 110 form a closed loop. For example, in Figure 14 The current half-wavelength period is shown as follows: the first sub-resonant current I21 extends along the extension direction of the first side 120a, and flows in a direction away from the second side 120b; the second sub-resonant current I22 flows from the second end 1122 to the second coupling end 1121, and from the first coupling end 1112 to the grounding point G1. Specifically, in Figure 14 As shown in the current half-wavelength period, the first sub-resonant current I21 extends along the first side 120a and is self-distributed between the ground point G1 and the second end 1122 of the ground 120.

[0100] The second resonant mode further includes a second sub-mode, which includes a half-wavelength mode from the ground point G1 to the first coupling terminal 1112 and from the second coupling terminal 1121 to the second terminal 1122. The second sub-mode and the first sub-mode are used together to support the second sub-frequency band. Therefore, the antenna assembly 10 provided in this application embodiment has a higher system radiation efficiency in the second sub-frequency band.

[0101] Please see Figure 15 , Figure 15 for Figure 13 The diagram shows partial dimensions of the first radiator in the antenna assembly. In this embodiment, the sum L of the electrical length from the grounding point G1 in the first radiator 110 to the first coupling end 1112 and the electrical length of the first parasitic radiator 112 is... BAEF satisfy: Where, λ 12 The wavelength is the wavelength corresponding to the center frequency point of the second sub-band.

[0102] L BAEF The electrical length L from the grounding point G1 in the first radiator 110 to the first coupling terminal 1112 is equal to the electrical length L. BA The electric length L of the first parasitic radiator 112 EF The sum of L. BAEF It can be, but is not limited to, for or or The sum L of the electrical length from the grounding point G1 in the first radiator 110 to the first coupling end 1112 and the electrical length of the first parasitic radiator 112. BAEF satisfy: This allows the sum of the electrical lengths L to be such that BAEFIt can better match the electrical length required by the second sub-mode, so that the second sub-band supported by the second sub-mode has better antenna performance.

[0103] Please see Figure 16 and Figure 17 , Figure 16 for Figure 12 The diagram shows the distribution of the third resonant current corresponding to the third resonant mode of the antenna assembly shown. Figure 17 for Figure 16 The diagram shows the S-parameters corresponding to the first resonant mode, second resonant mode, and third resonant mode of the first target frequency band in the antenna assembly shown. The first feed source S1 is also used to excite the third resonant mode to support the third sub-band of the first target frequency band, wherein the third resonant mode includes a composite right / left-handed (CRLH) mode from the ground point G1 to the first feed point P1. The frequency of the third sub-band is lower than the frequency of the first sub-band, and the frequency of the third sub-band is lower than the frequency of the second sub-band.

[0104] In this embodiment, the third resonant mode includes a composite right / left-handed (CRLH) mode from the ground point G1 to the first feed point P1. Therefore, the first main radiator 111 also has a ground point G1. The ground point G1 is set to meet the boundary conditions for exciting the third resonant mode, so as to facilitate the excitation of the third resonant mode.

[0105] In this embodiment, the first feed source S1 is also used to excite the third resonant mode to support the third sub-band of the first target frequency band, thereby enabling the antenna assembly 10 to support not only the first and second sub-bands of the first target frequency band, but also the third sub-band of the first target frequency band. That is, the antenna assembly 10 can support a greater number of sub-bands in the first target frequency band, satisfying the communication requirements of the antenna assembly 10 in multiple sub-bands of the first target frequency band, and giving the antenna assembly 10 a wider bandwidth in the first target frequency band. In other words, the bandwidth of the antenna assembly 10 in the first target frequency band is increased.

[0106] In this embodiment, the third resonant mode includes a composite left-handed and right-handed mode from the ground point G1 to the first feed point P1, utilizing the portion of the first main radiator 111 between the ground point G1 and the first feed point P1. For ease of description, the resonant current when the third resonant mode supports the third sub-frequency band is named the third resonant current I3. The third resonant current I3 is distributed between the ground point G1 and the first feed point P1 in the first main radiator 111. Figure 16 As shown in the current half-wavelength period, the third resonant current I3 flows from the grounding point G1 to the first feed point P1. It can be understood that the third resonant current I3 is periodically changing; in the next half-wavelength period, the third resonant current I3 flows from the first feed point P1 to the grounding point G1.

[0107] It should be noted that when the antenna assembly 10 supports the third sub-band, in addition to exciting the third resonant current I3, a resonant current I3' corresponding to the third resonant current I3 is also excited on the ground plane 120. The resonant current on the ground plane 120 is distributed in the portion corresponding to the first feed point P1 to the ground point G1. The resonant current on the ground plane 120 and the third resonant current I3 form a loop. Figure 16 The current half-wavelength period is shown as follows: the third resonant current I3 flows from the grounding point G1 to the first feed point P1; correspondingly, the resonant current on the ground plate 120 flows from the part corresponding to the first feed point P1 to the part corresponding to the grounding point G1.

[0108] Furthermore, when the antenna assembly 10 supports the third sub-band, in addition to exciting the third resonant current I3, it also exciting currents at other parts of the first radiator 110, as shown by the dashed lines in the figure. The current value of the third resonant current I3 is greater than the current excited at other parts of the first radiator 110 (current I3” as shown by the dashed lines in the figure).

[0109] It should be noted that the first resonant current I1, the first sub-resonant current I21 of the second resonant current I2, the second sub-resonant current I22 of the second resonant current I2, and the third resonant current I3 described in the embodiments of this application are all the main resonant current distributions supporting the corresponding frequency band. When the antenna assembly 10 supports the corresponding frequency band, in addition to the main resonant current distributions described above, it will also excite the resonant currents of other parts. The above description of the first resonant current I1, the first sub-resonant current I21 of the second resonant current I2, the second sub-resonant current I22 of the second resonant current I2, and the third resonant current I3 should not be understood as supporting the resonant currents of other parts excluded.

[0110] exist Figure 17 In the diagram, the first resonant mode is identified as A1, the second resonant mode is identified as A2, and the third resonant mode is identified as A3.

[0111] In this embodiment, the frequency of the third sub-band is lower than the frequency of the first sub-band, the frequency of the third sub-band is lower than the frequency of the second sub-band, and the frequency of the second sub-band is lower than the frequency of the first sub-band. In other words, among the three sub-bands—the first, second, and third—the first sub-band has the highest frequency, the third sub-band has the lowest frequency, and the frequency of the second sub-band is between the first and third sub-bands. Because the frequency of the third sub-band is lower than that of the first, second, and third sub-bands, they can cover a wider frequency range, enabling the antenna assembly 10 to have better communication performance in the first target frequency band.

[0112] As described above, the antenna assembly 10 exhibits an efficiency dip when supporting the first sub-band. The frequency of the third sub-band is lower than that of the second sub-band, and the frequency of the second sub-band is lower than that of the first sub-band. Therefore, the adverse effects of the efficiency dip of the first sub-band on the second sub-band can be reduced or even avoided, and the adverse effects of the efficiency dip of the first sub-band on the third sub-band can also be reduced or avoided. This results in the antenna assembly 10 having good antenna performance in both the second and third sub-bands.

[0113] In related technologies, antenna assemblies typically incorporate a switching switch to enable support for multiple sub-bands of the first target frequency band. This switch allows for switching between the sub-bands supported by the antenna assembly. However, antenna assemblies in these technologies cannot support a large number of sub-bands simultaneously, and the inclusion of a switching switch increases antenna cost and degrades the performance of the supported sub-bands.

[0114] The antenna assembly 10 provided in this embodiment can form a first resonant mode, a second resonant mode, and a third resonant mode, thereby covering the first sub-band, the second sub-band, and the third sub-band in the first target frequency band from the perspective of multiple resonant modes. In one embodiment, the first sub-band, the second sub-band, and the third sub-band can cover part or all of the operating frequency band in the first target frequency band. For example, when the first target frequency band is a low-frequency band, the antenna assembly 10 provided in this embodiment can cover part or all of the operating frequency band of the low-frequency band. Therefore, when the antenna assembly 10 provided in this embodiment supports the first sub-band, the second sub-band, and the third sub-band, it has a wide coverage range and does not require switching, thus reducing the cost of the antenna assembly 10. Furthermore, the performance of the first sub-band, the second sub-band, and the third sub-band supported by the antenna assembly 10 is good.

[0115] Please see Figure 18 , Figure 18 for Figure 12 The diagram shows a detailed representation of the antenna assembly. The first main radiator 111 includes a first radiating part 111a and a second radiating part 111b. The first radiating part 111a is disposed corresponding to the second side 120b, and has a first end 1111 and a first feed point P1. The second radiating part 111b and the first parasitic radiating part are both disposed corresponding to the first side 120a, and the second radiating part 111b is bent and connected to the first radiating part 111a. The grounding point G1 is located at a point centered on the reference point O1 and extending beyond the reference point O1. Within a circular region of radius R, the reference point O1 is the intersection of the edge of the first radiating part 111a in its extending direction and the edge of the second radiating part 111b in its extending direction, λ 10 The wavelength is the wavelength corresponding to the center frequency of the first target frequency band.

[0116] The bend where the second radiating part 111b connects to the first radiating part 111a can be arc-shaped or right-angled, and there is no limitation here, as long as the second radiating part 111b and the first radiating part 111a are connected by a bend.

[0117] In this embodiment, the reference point O1 is defined as the intersection of the edge of the first radiating portion 111a facing away from the floor 120 and the edge of the second radiating portion 111b facing away from the floor 120. It can be understood that in other embodiments, the reference point O1 is defined as the angle between the edge of the first radiating portion 111a near the floor 120 and the edge of the second radiating portion 111b near the floor 120. Since the width of the first radiating portion 111a is not large, the reference point O1 and the circular area obtained in these two embodiments are not significantly different.

[0118] From the illustrated perspective, the first radiating portion 111a extends horizontally, and the second radiating portion 111b extends vertically. Therefore, the reference point O1 is defined as the intersection of the horizontal edge of the first radiating portion 111a extending horizontally and the vertical edge of the second radiating portion 111b extending vertically.

[0119] The first main radiator 111 is located in a circle with the reference point O1 as the center, and with... The portion of the circular region with radius R represents the possible locations for the connection point. Therefore, a portion of both the first radiating part 111a and the second radiating part 111b falls within the circular region. Consequently, the reference point O1 is located within the circular region and can be located at the junction of the first radiating part 111a, the second radiating part 111b, or the point where the first radiating part 111a and the second radiating part 111b connect.

[0120] The grounding point G1 is located at a point centered on the reference point O1 and within a radius of 1 / 2. Within a circular region of radius R, the boundary conditions for exciting the third resonant mode can be well satisfied, facilitating the excitation of the third resonant mode. Therefore, the antenna assembly 10 can effectively meet the excitation conditions supporting the first, second, and third resonant modes. Consequently, the antenna assembly 10 can effectively support the first, second, and third sub-bands of the first target frequency band, satisfying the communication requirements of the antenna assembly 10 in multiple sub-bands of the first target frequency band, thus giving the antenna assembly 10 a wider bandwidth in the first target frequency band.

[0121] Further, please refer to Figure 18 The grounding point G1 is located in the second radiating part 111b, and the physical length from the grounding point G1 in the second radiating part 111b to the first coupling end 1112 is... satisfy: in, λ is the ratio of the propagation time of the electromagnetic wave signal of the first target frequency band in the medium surrounding the first radiator to the propagation time of the electromagnetic wave signal of the first target frequency band in free space, given the same physical length. Specifically, for the same physical length of medium and free space, 'a' is the propagation time of the electromagnetic wave signal of the first target frequency band in the medium surrounding the first radiator 110, 'b' is the propagation time of the electromagnetic wave signal of the first target frequency band in free space, and λ... 10 The wavelength is the wavelength corresponding to the center frequency of the first target frequency band.

[0122] In this embodiment, the grounding point G1 is located in the second radiating part 111b, and therefore, the second grounding point G1 is provided corresponding to the first side 120a of the floor 120.

[0123] The physical length from the grounding point G1 in the second radiating section 111b to the first coupling end 1112 satisfy: or or

[0124] The physical length from the grounding point G1 in the second radiating section 111b to the first coupling end 1112 satisfy: Therefore, the second radiating element 111b and the first parasitic radiator 112 work together to effectively excite the zero-order mode of the ground plane 120, resulting in better system radiation efficiency of the antenna assembly 10 in the second sub-frequency band.

[0125] Furthermore, the electrical length L in the first main radiator 111 located between the grounding point G1 and the first feed point P1 BC satisfy: Where, λ 13 The wavelength is the wavelength corresponding to the center frequency of the third sub-band.

[0126] The electrical length L in the first main radiator 111 located between the first grounding point G1 and the first feed point P1 BC It can be, but is not limited to, for or or

[0127] The electrical length L in the first main radiator 111 located between the grounding point G1 and the first feed point P1 BC satisfy: This allows the electrical length of the portion of the first main radiator 111 located between the grounding point G1 and the first feed point P1 to be more closely matched with the electrical length required to excite the third resonant mode, thereby improving the performance of the third sub-frequency band supported by the third resonant mode.

[0128] Further, in one embodiment, the first target frequency band is a low-frequency band. The first sub-frequency band is used to cover the receiving frequency band of the B8 band; the second sub-frequency band is used to cover the transmitting frequency bands of the B20 band, the B5 band, and the B8 band; and the third sub-frequency band is used to cover the B28 band.

[0129] Specifically, in this embodiment, the second sub-band is used to cover the transmitting and receiving bands of the B20 band, the B5 band, and the B5 band. The third sub-band is used to cover the transmitting and receiving bands of the B28 band.

[0130] In summary, the antenna assembly 10 provided in this application can cover the receiving band, transmitting band, transmitting band, receiving band, transmitting band, and receiving band of the B8, B20, B5, and B28 frequency bands in the low-frequency band. Therefore, the antenna assembly 10 can meet the communication needs of the B20, B5, B8, and B28 frequency bands in the low-frequency band, and has a wide operating bandwidth in the low-frequency band.

[0131] The performance of the antenna assembly 10 provided in one embodiment of this application will be simulated and explained next.

[0132] In this embodiment, during simulation, using Figure 12 The structure of the antenna assembly 10 shown in the simulation is intended to illustrate, but it should not be construed as a limitation on the antenna assembly 10 provided in the embodiments of this application. Please refer to [the relevant documentation / reference]. Figure 12 , Figure 19 , Figure 20 and Figure 21 , Figure 19 for Figure 12 A schematic diagram of the first resonant current corresponding to the first resonant mode of the provided antenna assembly; Figure 20 for Figure 12 A schematic diagram of the second resonant current corresponding to the second resonant mode of the provided antenna assembly; Figure 21 for Figure 12 A schematic diagram of the third resonant current corresponding to the third resonant mode of the provided antenna assembly. To clearly illustrate the flow direction of each resonant current, Figures 19 to 21The images are illustrated in (a) and (b), where (a) is a color image and (b) is a grayscale image of (a) in the same figure. Figures 19 to 21 In (a) of the diagram, to clearly illustrate the direction of each resonant current, a red line with an arrow indicates the direction of each resonant current. Figures 19 to 21 In this design, some components of electronic device 1 are obscured. Figure 19 It can be seen that, during the current half-wavelength period, the first resonant current I1 flows from the second coupling terminal 1121 to the second terminal 1122. From... Figure 20 It can be seen that the second resonant current I2 includes a first sub-resonant current I21 and a second sub-resonant current I22. In the current half-wavelength period: the first sub-resonant current I21 extends along the extension direction of the first side 120a and flows in a direction away from the second side 120b; the second sub-resonant current I22 flows from the second end 1122 to the second coupling end 1121, and from the first coupling end 1112 to the grounding point G1.

[0133] Depend on Figure 21 As can be seen, the third resonant current I3 flows from the grounding point G1 to the first feed point P1. Furthermore, when the antenna assembly 10 supports the third sub-band, in addition to exciting the third resonant current I3, a resonant current corresponding to the third resonant current I3 is also excited on the ground plane 120. The resonant current on the ground plane 120 is distributed across the portion corresponding to the first feed point P1 to the grounding point G1. The resonant current on the ground plane 120 and the third resonant current I3 form a loop. Figure 21 The current half-wavelength period is shown as follows: the third resonant current I3 flows from the grounding point G1 to the first feed point P1; correspondingly, the resonant current on the ground plate 120 flows from the part corresponding to the first feed point P1 to the part corresponding to the grounding point G1.

[0134] In addition, please continue to refer to Figure 16 and Figure 21 When the antenna assembly 10 supports the third sub-band, in addition to exciting the third resonant current I3, it also exciting current I3' on the ground 120 and current I3” at other parts of the first radiator 110, as shown by the dashed lines in the figure. The current value of the third resonant current I3 is greater than the current excited at other parts of the first radiator 110 (as shown by the dashed lines in the figure).

[0135] Please see Figure 22 , Figure 22This is a schematic diagram of an antenna assembly provided in another embodiment of this application. In this embodiment, the antenna assembly 10 includes a first antenna 100. The first antenna 100 is described above and will not be repeated here. The antenna assembly 10 of this embodiment also includes a second antenna 200. The second antenna 200 is used to support a second target frequency band, the frequency of which is greater than the frequency of the first target frequency band.

[0136] The antenna assembly 10 provided in this application embodiment further includes a second antenna 200, which can be incorporated into the antenna assembly 10 provided in any of the preceding embodiments that also includes a first antenna 100. The schematic diagrams in this application illustrate the antenna assembly 10 further including a second antenna 200 incorporated into an antenna assembly 10 provided in a preceding embodiment; it should be understood that this should not be construed as a limitation on the antenna assembly 10 provided in this application embodiment.

[0137] The antenna assembly 10 provided in this application includes a first antenna 100 and a second antenna 200. The first antenna 100 is used to support a first target frequency band, and the second antenna 200 also includes a second target frequency band. Therefore, the antenna assembly 10 can meet the communication requirements of the first target frequency band and the second target frequency band.

[0138] In one embodiment, the first target frequency band is a low-frequency band, and the second target frequency band is a mid-frequency band. In another embodiment, the first target frequency band is a low-frequency band, and the second target frequency band is a high-frequency band. In yet another embodiment, the first target frequency band is a low-frequency band, and the second target frequency band is a mid-to-high frequency band.

[0139] Please refer to the following: Figure 22 and Figure 23 , Figure 23 for Figure 22 A detailed schematic diagram of the antenna assembly is shown. In this embodiment, the second antenna 200 includes a second radiator 210 and a second feed source S2. The second radiator 210 includes a second main radiator 211 and a second parasitic radiator 212. The second main radiator 211 includes a third terminal 2111, a second feed point P2, and a third coupling terminal 2112 arranged sequentially. The third terminal 2111 is grounded. The second parasitic radiator 212 includes a fourth coupling terminal 2121 and a fourth terminal 2122. The third coupling terminal 2112 and the fourth coupling terminal 2121 are spaced apart and coupled, the fourth terminal 2122 is grounded, and the fourth terminal 2122 is spaced apart from the first terminal 2111. The second feed source S2 is electrically connected to the second feed point P2, energizing the second radiator 210 to support the second target frequency band.

[0140] In this embodiment, the second main radiator 211 and the second parasitic radiator 212 are disposed corresponding to the second side 120b. It should be understood that the positions of the second main radiator 211 and the second parasitic radiator 212 provided in the schematic diagram of this embodiment should not be construed as limiting the antenna assembly 10 provided in this embodiment.

[0141] The second antenna 200 of the antenna assembly 10 provided in this application supports the second target frequency band. It utilizes not only the second main radiator 211 but also the second parasitic radiator 212, which enables the second target frequency band supported by the second antenna 200 to have better antenna performance.

[0142] Understandably, in another embodiment, the first antenna 100, in addition to supporting the first target frequency band, is also used to support a third target frequency band, the frequency of which is greater than the frequency of the first target frequency band.

[0143] In addition to supporting the first target frequency band, the first antenna 100 is also used to support the third target frequency band, thus realizing the multiplexing of the antennas for the first target frequency band and the third target frequency band; in addition, it also enables the first antenna 100 to meet the communication requirements of the first target frequency band and the third target frequency band.

[0144] In one embodiment, the first target frequency band includes a low-frequency band (LB), and the third target frequency band includes a mid-frequency band (MB), a high-frequency band (HB), or a mid-high-frequency band (MHB). This allows for the reuse of antennas in the low-frequency band and the mid-frequency band (MB), high-frequency band (HB), or mid-high-frequency band (MHB), satisfying the communication requirements of both the low-frequency and high-frequency bands.

[0145] The dimensions of various parts of the first radiator 110 when the antenna assembly 10 provided in this embodiment is applied to the electronic device 1 will be illustrated below. Please refer to [link / reference]. Figure 22 , Figure 23 and Figure 24 , Figure 24This is a schematic diagram showing the dimensions of various parts of the first radiator when the antenna assembly provided in one embodiment of this application is applied to an electronic device. In this embodiment, the second side 120b corresponding to the bottom edge of the electronic device 1 is used as an example. Since the fourth end 2122 is spaced apart from the first end 1111, and the third coupling end 2112 is spaced apart from the fourth coupling end 2121, the bottom edge of the electronic device 1 to which the antenna assembly 10 is applied has two gaps. One of these gaps is the gap between the fourth end 2122 and the first end 1111, and the other gap is the gap between the third coupling end 2112 and the fourth coupling end 2121.

[0146] In one implementation, please refer to... Figure 22 The electronic device 1 to which the antenna assembly 10 is applied also includes a USB interface 60. One of the two slits is located on one side of the USB interface 60, and the other of the two slits is located on the other side of the USB interface 60.

[0147] From the perspective of the illustration, the left side of the gap on the left side of the USB interface 60 is the first main radiator 111 of the first antenna 100. The first main radiator 111 is roughly "L"-shaped, and both ends of the first main radiator 111 (i.e., the first end 1111 and the first coupling end 1112) are open-circuited. From the perspective of the illustration, the gap on the right side of the USB interface 60 is the second main radiator 211 of the second antenna 200. The end of the second radiator 210 near the USB junction interface is the third coupling end 2112, which is open-circuited; the end of the second radiator 210 away from the USB interface 60 is the third end 2111, which is grounded. For example, the third end 2111 can be grounded via, but is not limited to, the metal of the front shell 30. Understandably, in other embodiments, the third end 2111 can be grounded via a spring or a conductive screw, etc. The radiator between the two gaps is the second parasitic radiator 212 of the second antenna 200.

[0148] The first feed point P1 is located to the left of the USB interface 60 shown in the figure. The first feed point P1 can be electrically connected to the first feed source S1 via a spring contact. A matching position can be reserved between the spring contact and the first feed point P1 for connection to a matching circuit. The lower left corner of the figure shows the grounding point G1 of the first main radiator 111. The grounding point G1 can be grounded by setting a grounding component (such as a steel sheet) on the acoustic cavity (BOX) of the electronic device 1 and connecting the grounding point G1 of the first main radiator 111 to the front shell 30 (also called the middle frame, constituting at least part of the ground electrode) by screws. Specifically, the antenna assembly 10 includes two screws, one of which secures the grounding point G1 and one end of the grounding component; the other screw connects the other end of the grounding component to the front shell 30. Figure 24 In the schematic diagram shown, one of the two screws is further away from the second side 120b than the other of the two screws. See also... Figure 25 , Figure 25 This is a schematic diagram showing the grounding point electrically connected to the ground in an antenna assembly provided for another embodiment. In this embodiment, the antenna assembly 10 includes, for example, two screws. One screw 710 secures the grounding point G1 and one end of the grounding member 720; the other screw 730 connects the other end of the grounding member 720 to the front housing 30. Figure 25 In the schematic diagram shown, the other of the two screws is closer to the second side 120b than the first of the two screws. This application does not limit the position of the two screws when the antenna assembly 10 includes two screws, as long as the grounding point G1 is grounded through the two screws. It is understood that in other embodiments, the grounding point G1 can also be grounded through other means such as a spring clip, as long as the grounding point G1 is grounded.

[0149] In one embodiment, the grounding point G1 can be achieved by placing a steel sheet on the sound cavity (BOX) of the electronic device 1 and connecting the grounding point G1 of the first main radiator 111 to the front shell 30 (also called the middle frame) of the electronic device 1 using a screw, thus achieving a return to ground. This is equivalent to connecting an inductor to ground in series at the grounding point G1. In this way, the frequencies of each sub-band of the first target frequency band can be adjusted. The inductance value of the inductor can be equivalent to, but not limited to, 1nH, or approximately 1nH. The gap between the first coupling end 1112 of the first main radiator 111 and the second coupling end 1121 of the first parasitic radiator 112 can be, but not limited to, 1mm. The second end 1122 of the first parasitic radiator is directly connected to the front shell 30 of the electronic device 1 for a return to ground.

[0150] In this embodiment, the dimension of the portion of the first main radiator 111 located between the first feed point P1 and the ground point G1 is defined as L1, the dimension of the portion between the ground point G1 and the first coupling end 1112 is defined as L2, and the dimension of the stub of the first parasitic stub is defined as L3. In one embodiment, appropriate L1, L2, and L3 can be selected according to the frequency band supported by the first antenna 100. The first parasitic radiator 112 is excited to produce a first resonant mode (also called a parasitic mode) to support the first sub-band for covering the receiving frequency band of the B8 band. The ground point G1 to the first coupling end 1112 and the second coupling end 1121 to the second end 1122 are excited to produce a second resonant mode (including a zero-order mode) to support the second sub-band for covering the transmitting frequency bands of the B20, B5, and B8 bands. The portion of the first main radiator 111 located between the grounding point G1 and the first feed point is excited to a third resonant mode (CRLH mode) to support a third sub-band for covering the B28 band.

[0151] Please see Figure 26 , Figure 26 for Figure 22 The diagram shows the S-parameter curves of the antenna assembly. In this diagram, the horizontal axis represents frequency (GHz), and the vertical axis represents S-parameters (dB). For ease of illustration, Figure 26 (a) in the image is in color. Figure 26 (b) in the middle is Figure 26 The image is a grayscale representation of (a). Curve ① is the S-parameter curve of the first antenna 100, indicating that the first target frequency band supported by the first antenna 100 is the low-frequency band (LB). When the first target frequency band supported by the first antenna 100 is the low-frequency band, the bandwidth is relatively wide and can cover the entire operating frequency band of the low-frequency band. Curve ② is the S-parameter curve of the second antenna 200, indicating that the second target frequency band supported by the second antenna 200 is the mid-high frequency band (MHB).

[0152] In summary, one embodiment of this application provides an antenna assembly 10. In the first antenna 100 of the antenna assembly 10, the first feed S1 can excite a number of resonant modes (a first resonant mode and a second resonant mode; or, a first resonant mode, a second resonant mode, and a third resonant mode) to support the first target frequency band, resulting in a wide overall bandwidth for the first target frequency band. Furthermore, the antenna assembly 10 provided by this application can cover the entire operating frequency band of the first target frequency band without requiring an antenna, saving 1-2 switches compared to existing technologies and reducing the cost of the electronic device 1 to which the antenna assembly 10 is used.

[0153] Furthermore, since the antenna assembly 10 does not require a switch (also known as zero-switching) when supporting the first target frequency band, the losses introduced by the switch can be reduced or even avoided, thereby improving the antenna performance of the antenna assembly 10 in the first target frequency band. For example, the antenna performance of the antenna assembly 10 in the first target frequency band can be improved by 1.5 dB to 2.0 dB.

[0154] Furthermore, when the antenna assembly 10 supports the first target frequency band, no switch is required (also known as zero switch), thus saving layout space on the electronic device 1 to which the antenna assembly 10 is applied (such as a PCB board), optimizing the overall performance of the electronic device 1 to which the antenna assembly 10 is applied, and improving the user experience.

[0155] Furthermore, when the first antenna 100 supports the first target frequency band, the second resonant mode (including the zero-order mode) is the dominant mode, which greatly improves the radiation efficiency of the antenna assembly 10 when supporting the first target frequency band.

[0156] Furthermore, the first radiator 110 and the first feed S1 of the antenna assembly 10 constitute an ICE unit. The first radiator 110 has a larger size, which allows it to support more potential modes. In addition, this embodiment of the application also excites the first resonant mode, the second resonant mode, and the third resonant mode by rationally designing the location of the return point, thus covering the entire operating frequency band of the low-frequency band.

[0157] Please see Figure 27 , Figure 27 This is a comparative schematic diagram of an antenna assembly provided in one embodiment of this application and antenna assemblies in related technologies. Free-space (FS) performance is labeled "FS performance" in the diagram. The FS performance includes radiation efficiency. In the comparison, the first target frequency band is considered a low-frequency band, and the comparison is taken as an example of the B8, B5, and B28 frequency bands. In related technologies, antenna assemblies 10 require switching 1-2 antennas to support the first target frequency band; however, the antenna assembly 10 provided in this embodiment does not require switching when supporting the first target frequency band. Compared to the antenna assembly 10 provided in related technologies, the antenna assembly 10 provided in this embodiment shows improved free-space performance (e.g., radiation efficiency) in the B8, B5, and B28 frequency bands.

[0158] Furthermore, this application also provides an electronic device 1. The electronic device 1 includes, but is not limited to, devices capable of transmitting and receiving electromagnetic wave signals such as mobile phones, telephones, televisions, tablets, cameras, personal computers, laptops (PCs), in-vehicle devices, headphones, watches, wearable devices, base stations, vehicle radars, customer premises equipment (CPEs), and large-screen terminals. In this application, a mobile phone is used as an example of the electronic device 1; other devices can be referred to the specific description in this application.

[0159] Please refer to the following: Figure 28 , Figure 29 , Figure 30 and Figure 31 , Figure 28 A schematic diagram of an electronic device provided according to one embodiment of this application; Figure 29 for Figure 28 A partial structural diagram of the electronic device provided in the document; Figure 30 A schematic diagram of an electronic device provided according to another embodiment of this application; Figure 31 for Figure 30 A partial structural diagram of the electronic device provided is shown. The electronic device 1 includes an antenna assembly 10. The antenna assembly 10 is described previously and will not be repeated here. Figure 28 and Figure 29 In the illustrated electronic device 1, the antenna assembly 10 of the electronic device 1 includes a first antenna 100 as an example. Figure 30 and Figure 31 In the electronic device 1 shown, the antenna assembly 10 of the electronic device 1 includes a first antenna 100 and a second antenna 200 as an example.

[0160] From the front Figure 8 As described in the antenna assembly 10, the electronic device 1 provided in this application includes an antenna assembly 10. At least a portion of the first radiator 110 is disposed corresponding to the first side 120a. The first radiator 110 includes a first end 1111, a first feed point P1, and a first coupling end 1112 arranged sequentially. The second coupling end 1121 of the first parasitic radiator 112 is spaced apart from and coupled to the first coupling end 1112 of the first radiator 110. The second end 1122 is grounded. Therefore, the first radiator 110 and the first feed S1 of the antenna assembly 10 constitute an ICE unit, which can effectively excite the zero-order mode of the ground plane 120. Consequently, when the first antenna 100 supports the first target frequency band, it has high radiation efficiency in the first target frequency band. Therefore, the first antenna 100 of the antenna assembly 10 provided in this application has good communication performance in the first target frequency band.

[0161] In this embodiment, the electronic device 1 further includes a front housing 30. The front housing 30 is also referred to as a mid-frame. The front housing 30 includes a frame body 310 and a side frame portion 320. The frame body 310 constitutes at least a portion of the ground electrode in the antenna assembly 10. The side frame portion 320 surrounds the periphery of the frame body 310 and is bent and connected to the frame body 310. Figure 28 and Figure 29 In the illustrated embodiment, both the first main radiator 111 and the first parasitic radiator 112 of the first antenna 100 are located in the frame portion 320. Figure 30 and Figure 31 In the illustrated embodiment, the first main radiator 111 and the first parasitic radiator 112 of the first antenna 100 are both located in the frame portion 320. The second main radiator 211 and the second parasitic radiator 212 of the second antenna 200 are both located in the frame portion 320.

[0162] Understandably, the electronic device 1 provided in this application embodiment, when in portrait mode, also has a bent and connected side edge 1a and bottom edge 1b. The first side 120a of the floor 120 corresponds to the side edge 1a, and the second side 120b of the floor corresponds to the bottom edge 1b. Thus, the first radiating portion 111a of the first main radiator 111 corresponds to the bottom edge 1b of the electronic device 1, and the second radiating portion 111b and the first parasitic radiator 112 correspond to the side edge 1a of the electronic device 1. In this way, the long side of the floor 120 in the electronic device 1 can be better utilized to realize the zero-order mode, resulting in higher radiation efficiency of the antenna assembly 10 in the second sub-frequency band.

[0163] It should be noted that the schematic diagrams of this application's embodiments are illustrated by taking the first radiator 110 of the first antenna 100 as an example located on the left and bottom of the rear view of the electronic device 1. This should not be construed as a limitation on the antenna assembly 10 provided in this application's embodiments. In other embodiments, the first radiator 110 of the first antenna 100 may also be located on the right and bottom of the electronic device 1; or simply on the right side. It is understood that when the position of the first radiator 110 of the first antenna 100 changes in the electronic device 1, the position of the first feed point P1 will also change accordingly. For example, as the position of the first radiator 110 of the first antenna 100 changes in the electronic device 1, the first feed point P1 may also be at the bottom, top, or side of the electronic device 1.

[0164] The electronic device 1 provided in this application embodiment is illustrated with the second radiator 210 of the second antenna 200 located at the bottom of the electronic device 1 as an example. It can be understood that the second radiator 210 of the second antenna 200 may also be located at other positions of the electronic device 1. The schematic diagram of this application embodiment should not be construed as a limitation on the position of the second antenna 200 of the antenna assembly 10 provided in this application embodiment.

[0165] It is understood that in the schematic diagrams of the embodiments of this application, the first radiator 110 and the second radiator 210 are illustrated as frame radiators formed with the frame portion 320. It is understood that in other embodiments, the first radiator 110 may also be a Mechanical Design Antenna (MDA) radiator, a PFC radiator, an LDS radiator, a PDS radiator, or a metal stub radiator, etc. Correspondingly, in other embodiments, the second radiator 210 may also be a Mechanical Design Antenna (MDA) radiator, a PFC radiator, an LDS radiator, a PDS radiator, or a metal stub radiator, etc.

[0166] Understandably, the antenna assembly 10 provided in this application supports the first target frequency band using the first resonant mode and the second resonant mode; or, it supports the first target frequency band using the first resonant mode, the second resonant mode, and the third resonant mode, without the need for a switch. Understandably, based on the antenna assembly 10 provided in the foregoing embodiments, in order to further optimize the S-parameters of the first target frequency band or further extend the bandwidth of the first target frequency band, a switch and corresponding matching device may also be added at the first feed point P1.

[0167] In one embodiment, the electronic device 1 further includes a USB interface 60 and a USB board. The USB board is electrically connected to the USB interface 60. The USB board is located at the bottom of the electronic device 1. In this embodiment, the second side 120b of the floor 120 is located at the bottom of the electronic device 1; therefore, the USB board is disposed adjacent to the second side 120b. The first feed source S1 is located on the USB board. Thus, the first feed source S1 and the USB interface 60 share the same USB board; therefore, there is no need to add an additional board to accommodate the first feed source S1, thereby saving costs.

[0168] In another embodiment, the second feed source S2 is located on the USB board. Therefore, the second feed source S2 and the USB interface 60 share the same USB board, eliminating the need for an additional board to accommodate the second feed source S2, thus saving costs.

[0169] Furthermore, the electronic device 1 provided in this application embodiment also includes a display screen 40 and a rear cover 50. The display screen 40 is a component that realizes the display function of the electronic device 1. The display screen 40 is supported on the front shell 30. The rear cover 50 is disposed on one side of the front shell 30, and the rear cover 50 is disposed opposite to the display screen 40.

[0170] Understandably, the above description of the electronic device 1 is merely an illustration of one environment in which the antenna assembly 10 is applied, and the specific structure of the electronic device 1 should not be construed as a limitation on the antenna assembly 10 provided in this application.

[0171] The above description represents some embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

Claims

1. An electronic device, characterized in that, The electronic device includes a floor and an antenna assembly; the floor includes a first side and a second side that are bent and connected, wherein the length of the first side is greater than the length of the second side; the antenna assembly includes a first antenna, which includes: A first radiator, at least partially corresponding to the first side, comprises a first main radiator and a first parasitic radiator. The first main radiator includes a first end, a first feed point, and a first coupling end arranged sequentially. The first parasitic radiator includes a second coupling end and a second end arranged sequentially, the second coupling end being spaced apart from and coupled to the first coupling end, and the second end being grounded. A first feed source is electrically connected to the first feed point, which excites a first resonant mode to support a first sub-band of the first target frequency band and excites a second resonant mode to support a second sub-band of the first target frequency band. The frequency range of the first sub-band is different from that of the second sub-band. The first resonant mode includes the parasitic mode of the first parasitic radiator, and the second resonant mode includes the zero-order mode of the ground plane. The first main radiator has a grounding point located between the first feed point and the first coupling end. The grounding point is grounded. The first feed source is also used to excite a third resonant mode to support the third sub-band of the first target frequency band. The third resonant mode includes a composite left-handed mode from the grounding point to the first feed point. The frequency of the third sub-band is less than the frequency of the first sub-band and less than the frequency of the second sub-band.

2. The electronic device as claimed in claim 1, characterized in that, The first resonant mode includes a quarter-wavelength mode from the second coupling end to the second end, and the first resonant mode is used to support a first sub-band of the first target frequency band.

3. The electronic device as described in claim 2, characterized in that, Physical length of the first parasitic radiator satisfy: in, Let λ be the ratio of the propagation time of the electromagnetic wave signal of the first target frequency band in the medium surrounding the first radiator to the propagation time of the electromagnetic wave signal of the first target frequency band in free space, given the same physical length. 10 The wavelength is the wavelength corresponding to the center frequency of the first target frequency band.

4. The electronic device as claimed in claim 2, characterized in that, The electric length L of the first parasitic radiator EF satisfy: Where, λ 11 The wavelength is the wavelength corresponding to the center frequency of the first sub-band.

5. The electronic device as claimed in claim 2, characterized in that, The frequency of the first sub-band is greater than the frequency of the second sub-band.

6. The electronic device as claimed in claim 1, characterized in that, The second resonant mode includes a first sub-mode and a second sub-mode. The first sub-mode is a half-wavelength mode along the extension direction of the ground along the first side. The second sub-mode includes a half-wavelength mode from the first feed point to the first coupling end and from the second coupling end to the second end.

7. The electronic device as claimed in claim 1, characterized in that, The first main radiator has a grounding point, which is located between the first feed point and the first coupling end, and the grounding point is grounded; The second resonant mode includes a first sub-mode and a second sub-mode. The first sub-mode is a half-wavelength mode along the extension direction of the ground plane along the first side. The second sub-mode includes a half-wavelength mode from the ground point to the first coupling end and from the second coupling end to the second end.

8. The electronic device as claimed in claim 7, characterized in that, The sum L of the electrical length from the grounding point to the first coupling end in the first radiator and the electrical length of the first parasitic radiator. BAEF satisfy: Where, λ 12 The wavelength is the wavelength corresponding to the center frequency point of the second sub-band.

9. The electronic device as claimed in claim 1, characterized in that, The first main radiator includes: A first radiating portion, disposed corresponding to the second side, the first radiating portion having a first end and a first feed point; and The second radiating part and the first parasitic radiator are both arranged corresponding to the first side, and the second radiating part is bent and connected to the first radiating part; The grounding point is located at a point centered on the reference point and within a circle... Within a circular region with radius λ, the reference point is the intersection of the edge of the first radiating part along its extension direction and the edge of the second radiating part along its extension direction. 10 The wavelength is the wavelength corresponding to the center frequency of the first target frequency band.

10. The electronic device as claimed in claim 9, characterized in that, The grounding point is located in the second radiating section, and the physical length from the grounding point in the second radiating section to the first coupling end is... satisfy: in, Let λ be the ratio of the propagation time of the electromagnetic wave signal of the first target frequency band in the medium surrounding the first radiator to the propagation time of the electromagnetic wave signal of the first target frequency band in free space, given the same physical length. 10 The wavelength is the wavelength corresponding to the center frequency of the first target frequency band.

11. The electronic device as claimed in claim 1, characterized in that, The electrical length L in the first main radiator located between the grounding point and the first feed point BC satisfy: Where, λ 13 The wavelength is the wavelength corresponding to the center frequency of the third sub-band.

12. The electronic device as claimed in claim 1, characterized in that, The first target frequency band is a low-frequency band; The first sub-band is used to cover the receiving frequency band of the B8 band; The second sub-band is used to cover the transmission frequency bands of the B20 band, the B5 band, and the B8 band; The third sub-band is used to cover the B28 band.

13. The electronic device according to any one of claims 1-12, characterized in that, The antenna assembly further includes a second antenna for supporting a second target frequency band, the frequency of which is greater than that of the first target frequency band.

14. The electronic device as claimed in claim 13, characterized in that, The second antenna includes: The second radiator includes a second main radiator and a second parasitic radiator. The second main radiator includes a third terminal, a second feed point, and a third coupling terminal arranged sequentially, with the third terminal grounded. The second parasitic radiator includes a fourth coupling terminal and a fourth terminal, with the third coupling terminal and the fourth coupling terminal spaced apart and coupled. The fourth terminal is grounded and spaced apart from the first terminal. The second feed source is electrically connected to the second feed point, which excites the second radiator to support the second target frequency band.

15. The electronic device as claimed in claim 1, characterized in that, The first antenna is also used to support a third target frequency band, wherein the frequency of the third target frequency band is greater than the frequency of the first target frequency band, the first target frequency band includes a low frequency band, and the third target frequency band includes a mid frequency band, or a high frequency band, or a mid-to-high frequency band.

16. The electronic device as claimed in claim 1, characterized in that, When the electronic device is in portrait mode, the electronic device has a bent and connected side and bottom edge, the first edge of the floor is set corresponding to the side edge, and the second edge of the floor is set corresponding to the bottom edge.

17. The electronic device as claimed in claim 16, characterized in that, The electronic device also includes a USB interface, which is located corresponding to the bottom edge. The first main radiator and the first parasitic radiator are both located on one side of the USB interface, and the first power supply point is located adjacent to the USB interface relative to the grounding point.

18. The electronic device as claimed in claim 17, characterized in that, The electronic device also includes a USB board electrically connected to the USB interface, and the first feed source of the first antenna is located on the USB board.

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