Electronic device

Abstract

The invention provides an electronic device. The electronic equipment comprises an antenna assembly, the antenna assembly comprises a first antenna, and the first antenna comprises a first radiator and a first feed source; the first radiator comprises a first free end, a second free end, a first feeding point and a first grounding point, the first feeding point and the first grounding point are located between the first free end and the second free end, the first feeding point is arranged close to the first free end compared with the first grounding point, and the first grounding point is grounded; the first feed source is electrically connected to the first feed point to excite the first radiator to generate a first resonance mode and a second resonance mode which support a first target frequency band, the first resonance mode is used for supporting the first target frequency band and has a first resonance frequency point, and the second resonance mode is used for supporting the second target frequency band and has a second resonance frequency point. The second resonant mode is used for supporting the first target frequency band and has a second resonant frequency point, and the second resonant frequency point is larger than the first resonant frequency point.

Description

Technical Field

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

[0002] With the development of technology, electronic devices with antenna components are increasingly widely used. However, in some application scenarios, when a user holds the electronic device, the communication performance of the antenna component in the electronic device is likely to be poor. Summary of the invention

[0003] In a first aspect, the present application provides an electronic device. The electronic device includes an antenna assembly, the antenna assembly includes a first antenna, and the first antenna includes:

[0004] a first radiator, the first radiator comprising a first free end and a second free end, and a first feeding point and a first grounding point located between the first free end and the second free end, the first feeding point being disposed closer to the first free end than the first grounding point, and the first grounding point being grounded; and

[0005] A first feed source, the first feed source is electrically connected to the first feeding point to excite the first radiator to generate a first resonant mode and a second resonant mode that support a first target frequency band, wherein the first resonant mode is used to support the first target frequency band and has a first resonant frequency point, and the second resonant mode is used to support the first target frequency band and has a second resonant frequency point, and the second resonant frequency point is greater than the first resonant frequency point.

[0006] In summary, the feed source of the antenna assembly provided in the embodiment of the present application excites the first radiator to generate two resonant modes, and the resonant frequencies of the two resonant modes are different. Therefore, the first antenna has a larger bandwidth when supporting the first target frequency band. Even when the frequency deviation occurs due to changes in the environment of the electronic device (such as being held by hand), since the first antenna has a larger bandwidth when supporting the first target frequency band, the frequency band supported by the first antenna after the frequency deviation also falls within the range of the first target frequency band. Therefore, the antenna assembly of the electronic device has better communication performance in the first target frequency band. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0008] Figure 1A schematic diagram of an electronic device provided in one embodiment of the present application;

[0009] Figure 2 A schematic diagram of an antenna assembly provided in one embodiment of the present application;

[0010] Figure 3 for Figure 2 The S parameters, system radiation efficiency and system overall efficiency simulation diagram of the antenna component shown in;

[0011] Figure 4 for Figure 2 A schematic diagram of current distribution when the first antenna in the antenna assembly shown in supports the first resonance mode;

[0012] Figure 5 for Figure 2 A schematic diagram of current distribution when the first antenna in the antenna assembly shown in supports the second resonance mode;

[0013] Figure 6 A schematic diagram of an antenna assembly provided in another embodiment of the present application;

[0014] Figure 7 An implementation method provided Figure 6 The equivalent circuit diagram of the antenna assembly shown;

[0015] Figure 8 A circuit diagram of an electronic device provided in one embodiment of the present application;

[0016] Fig. 9 for Figure 8 A correspondence table between the state of the switch unit when the electronic device is in various states and various frequency bands of the first target frequency band supported by the first antenna;

[0017] Fig.10 for Figure 7 A schematic diagram of S parameters of a first frequency band, a second frequency band and a third frequency band of the antenna assembly shown in FIG. 1 supporting a first target frequency band;

[0018] Fig.11 A schematic diagram of an antenna assembly provided in yet another embodiment of the present application;

[0019] Fig.12 A schematic diagram of current distribution when the first antenna in the antenna assembly provided in an embodiment of the present application supports the third resonance mode;

[0020] Fig.13 A schematic diagram of an antenna assembly provided in another embodiment of the present application;

[0021] Fig.14 A schematic diagram of an antenna assembly provided in another embodiment of the present application;

[0022] Fig.15 To include Fig.14 A circuit diagram of the electronics of the antenna assembly shown;

[0023] Fig.16 A schematic diagram of the efficiency of the first antenna of the antenna assembly provided in one embodiment of the present application in different frequency bands and states;

[0024] Fig.17 A Smith chart when the third frequency band supported by the electronic device used for the antenna assembly is the B8 frequency band when the electronic device is in the left head and hand state;

[0025] Fig.18 A Smith chart when the third frequency band supported by the electronic device applied to the antenna assembly is the B8 frequency band when the electronic device is in the right head and hand state;

[0026] Fig.19 A Smith chart when the third frequency band supported by the electronic device to which the antenna assembly is applied is the B8 frequency band when the electronic device is in a horizontal screen hand-held state;

[0027] Fig. 20 A schematic diagram of an electronic device provided in accordance with another embodiment of the present application.

[0028] Description of main component numbers:

[0029] Electronic device 1, antenna assembly 10, first antenna 110, first radiator 111, first feed source S1, tuning circuit 112, excitation inductor L0;

[0030] A first free end 1111, a second free end 1112, a first feeding point P1, and a first grounding point P0;

[0031] Switch unit 112a, common terminal 1120, first terminal 1121, second terminal 1122, third terminal 1123, fourth terminal 1124;

[0032] A first capacitor C1, a second capacitor C2, a third capacitor C3, a first inductor L1, and a second inductor L2;

[0033] The second antenna 120, the second radiator 121, the third free end 1211, the first ground end 1212, the second feeding point P2, the connection point P4, and the second feed source S2;

[0034] A third radiator 122, a fourth free end 1221, a second ground end 1222, a first slot 122a, and a second slot 122b;

[0035] A third antenna 130, a fourth antenna 140, an earpiece 150, a distance sensor 160, a posture sensor 170, and a controller 180;

[0036] Display screen 30, middle frame 50, circuit board 60, battery cover 70;

[0037] The first resonant current I1, the first sub-resonant current I11, the second sub-resonant current I12, the second resonant current I2, and the third resonant current I3. DETAILED DESCRIPTION

[0038] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the embodiments described in the present application are only a part of the embodiments, not all of the embodiments. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present application.

[0039] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive, independent, or alternative to other embodiments. It can be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0040] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example: a component or device including one or more parts is not limited to the one or more parts listed, but optionally includes one or more parts that are not listed but inherent to the exemplified product, or one or more parts that it should have based on the described function.

[0041] The present application provides an electronic device 1, which may be, but is not limited to, a mobile phone, a tablet computer, a laptop computer, a computer, a wearable device, or other device with a communication function.

[0042] See also Figure 1 , Figure 2 and Figure 3 , Figure 1 A schematic diagram of an electronic device provided in one embodiment of the present application; Figure 2 A schematic diagram of an antenna assembly provided in one embodiment of the present application; Figure 3 for Figure 2The S parameters, system radiation efficiency and system total efficiency simulation diagram of the antenna assembly shown in the figure. The electronic device 1 includes an antenna assembly 10. The antenna assembly 10 includes a first antenna 110. The first antenna 110 includes a first radiator 111 and a first feed source S1. The first radiator 111 includes a first free end 1111 and a second free end 1112, and a first feeding point P1 and a first grounding point P0 located between the first free end 1111 and the second free end 1112. The first feeding point P1 is arranged adjacent to the first free end 1111 compared to the first grounding point P0, and the first grounding point P0 is grounded. The first feed source S1 is electrically connected to the first feeding point P1 to excite the first radiator 111 to generate a first resonant mode and a second resonant mode that support a first target frequency band, wherein the first resonant mode is used to support the first target frequency band and has a first resonant frequency, and the second resonant mode is used to support the first target frequency band and has a second resonant frequency, and the second resonant frequency is greater than the first resonant frequency.

[0043] The first antenna 110 may be, but is not limited to, a low-frequency antenna. When the first antenna 110 is a low-frequency antenna, the first target frequency band may be a low-frequency band.

[0044] The first radiator 111 may be a laser direct structuring (LDS) radiator, or a flexible printed circuit (FPC) radiator, or a print direct structuring (PDS) radiator, or a metal branch radiator. When the antenna assembly 10 is applied to the electronic device 1, the first radiator 111 may be a mechanical design antenna (MDA) radiator designed using the metal insert of the electronic device 1 itself. For example, the first radiator 111 may be an antenna radiator designed using the middle frame formed of plastic and metal of the electronic device 1. In addition, the first radiator 111 may also be a radiator of a metal frame antenna designed using a metal middle frame.

[0045] It is understandable that the present application does not specifically limit the shape, structure and material of the first radiator 111. The shapes of the first radiator 111 include but are not limited to bent, straight, L-shaped, sheet-shaped, rod-shaped, coated, thin film, etc. When the first radiator 111 is in a strip shape, the present application does not limit the extension track of the first radiator 111, so the first radiator 111 can be extended in a straight line, a curve, a multi-stage bend, etc. The first radiator 111 can be a line with uniform width on the extension track, or it can be an irregular shape with different widths such as a gradual width and a widened area.

[0046] The first feed source S1 may be electrically connected to the first feed point P1 by, but is not limited to, direct electrical connection (such as welding) or indirect electrical connection to the first feed point P1 by coaxial line, microstrip line, conductive spring, conductive glue, etc.

[0047] The first grounding point P0 may be grounded in a manner that is, but not limited to, electrically connected to the ground electrode of the electronic device 1 through a coaxial line, a microstrip line, a conductive spring, a conductive adhesive, etc. It can be understood that the ground electrode of the electronic device 1 may be, but not limited to, a grounding layer of a circuit board in the electronic device 1, or a shielding member of a display screen of the electronic device 1, or a middle frame of the electronic device 1. This embodiment does not limit the specific form of the ground electrode of the electronic device 1.

[0048] The first radiator 111 includes a first free end 1111 and a second free end 1112 . The first feeding point P1 and the first grounding point P0 are located between the first free end 1111 and the second free end 1112 . It can be seen that the first radiator 111 is a T-shaped radiator.

[0049] In this embodiment, the first radiator 111 includes a first radiating portion and a second radiating portion connected by a bend, the first free end 1111 and the first feeding point P1 are located in the first radiating portion, and the second free end 1112 and the grounding point are located in the second radiating portion. It can be understood that the structure of the first radiator 111 in the schematic diagram of this embodiment should not be understood as a limitation of the first antenna 110 provided in the embodiment of the present application. In other embodiments, the first radiator 111 can also be a straight strip or a similar straight strip, and the first free end 1111 and the second free end 1112 are two opposite ends of the first radiator 111.

[0050] exist Figure 3 In the figure, the horizontal axis is frequency in GHz, and the vertical axis is in dB. Figure 2 The S1,1 curve of the first antenna 110 in the antenna assembly 10 shown; curve ② is Figure 2 The system radiation efficiency (System Rad.Efficiency) of the antenna assembly 10 shown; Curve ③ is Figure 2 The system total efficiency (SystemTot.Efficiency) of the antenna assembly 10 shown. It can be seen from curve ① that the frequency band range of the first target frequency band supported by the first antenna 110 is between 0.8GHz and 1.1GHz. Therefore, the first target frequency band can be regarded as a low-frequency band (Low Band, LB). It should be noted that, although the low-frequency band is generally a frequency band with a frequency less than 1GHz, the first target frequency band supported by the first antenna 110 provided in this embodiment can cover part of the low-frequency band, and although the maximum frequency of the first target frequency band is greater than 1GHz, it does not exceed 1GHz by much. Therefore, the first target frequency band can also be regarded as a low-frequency band. In curve ①, there are two depressions, among which the depression with a lower frequency corresponds to the first resonant mode, and the lowest point of this depression is the first resonant frequency; the depression with a higher frequency corresponds to the second resonant mode, and the lowest point of this depression is the second resonant frequency, and the second resonant frequency is greater than the first resonant frequency. It can be seen from this simulation diagram that the first antenna 110 of the antenna assembly 10 in the electronic device 1 provided in the embodiment of the present application has two resonant modes (the first resonant mode and the second resonant mode), and the resonant frequency bands of the two resonant modes are different. Therefore, the first antenna 110 has a larger bandwidth when supporting the first target frequency band.

[0051] In addition, it can be seen from curve ② and curve ③ that the first antenna 110 has a higher system radiation efficiency in the first target frequency band and has a higher system total efficiency.

[0052] When the electronic device 1 is in use, even if the first antenna 110 of the antenna assembly 10 supports the first target frequency band and frequency deviation occurs due to various reasons, such as the electronic device 1 is in the left hand, the right hand, or the horizontal screen is held, the frequency band supported after the frequency deviation also falls within the range of the first target frequency band, which can be better applied to scenes such as human hands (i.e., the user's hand holding the electronic device 1), human head and hand (i.e., the user's hand holding the electronic device 1 and close to the head). To a certain extent, the first antenna 110 of the antenna assembly 10 provided in the embodiment of the present application can be regarded as having lower head absorption and lower two-hand absorption performance in the first target frequency band. Therefore, the antenna assembly 10 of the electronic device 1 still has a good communication effect in the first target frequency band.

[0053] In summary, in the antenna assembly 10 provided in the embodiment of the present application, the feed source excites the first radiator 111 to generate two resonant modes, and the resonant frequencies of the two resonant modes are different. Therefore, the first antenna 110 has a larger bandwidth when supporting the first target frequency band. Even when the frequency deviation occurs due to changes in the environment of the electronic device 1 (such as being held by hand), since the first antenna 110 has a larger bandwidth when supporting the first target frequency band, the frequency band supported by the first antenna 110 after the frequency deviation also falls within the range of the first target frequency band. Therefore, the antenna assembly 10 of the electronic device 1 has better communication performance in the first target frequency band.

[0054] See also Figure 4 and Figure 5 , Figure 4 for Figure 2 A schematic diagram of current distribution when the first antenna in the antenna assembly shown in supports the first resonance mode; Figure 5 for Figure 2 Schematic diagram of current distribution when the first antenna in the antenna assembly supports the second resonant mode. The first resonant mode is a quarter-wavelength mode of convection from the first ground point P0 to the first free end 1111, and from the first ground point P0 to the second free end 1112; the second resonant mode is a half-wavelength mode from the first free end 1111 to the second free end 1112.

[0055] Depend on Figure 4It can be seen that the current corresponding to the first resonant mode is the first resonant current I1, and the first resonant current I1 includes a first sub-resonant current I11 and a second sub-resonant current I12, wherein the first sub-resonant current I11 is distributed between the first ground point P0 and the first free end 1111, and the second sub-resonant current I12 is distributed between the first ground point P0 and the second free end 1112. In the schematic diagram of the present embodiment, the first sub-resonant current I11 flows from the first ground point P0 to the first free end 1111, and the second sub-resonant current I12 flows from the first ground point P0 to the second free end 1112 as an example for illustration. In addition, in order to clearly illustrate the direction of the first sub-resonant current I11 and the second sub-resonant current I12, in the schematic diagram of the present embodiment, the first sub-resonant current I11 and the second sub-resonant current I12 are marked next to the first radiator 111 for illustration, which can be understood that it should not be understood as a limitation of the first resonant current I1 in the antenna assembly 10 provided in the embodiment of the present application. It can be understood that, in the same resonance mode, the resonance current on each radiator will change in different half-wavelength periods. In the current wavelength period, when the first antenna 110 supports the first resonance mode, the first sub-resonance current I11 and the second sub-resonance current I12 are excited on the first radiator 111, and the first sub-resonance current I11 flows from the first ground point P0 to the first free end 1111, and the second sub-resonance current I12 flows from the first ground point P0 to the second free end 1112. In the next half-wavelength period, when the first antenna 110 supports the first resonance mode, the first sub-resonance current I11 and the second sub-resonance current I12 are excited on the first radiator 111, and the first sub-resonance current I11 flows from the first free end 1111 to the first ground point P0, and the second sub-resonance current I12 flows from the second free end 1112 to the first ground point P0.

[0056] It should be noted that the "wavelength" of the "quarter-wavelength mode" mentioned in "the first resonant mode is a quarter-wavelength mode of convection from the first grounding point P0 to the first free end 1111, and from the first grounding point P0 to the second free end 1112" refers to the wavelength corresponding to the first resonant frequency.

[0057] When the first resonant mode is a quarter-wavelength mode of convection from the first ground point P0 to the first free end 1111 and from the first ground point P0 to the second free end 1112, the first antenna 110 in the antenna assembly 10 has higher radiation efficiency when supporting the first target frequency band.

[0058] See also Figure 5 , the current corresponding to the second resonant mode is the second resonant current I2. The second resonant current I2 is distributed between the first free end 1111 and the second free end 1112. In the schematic diagram of this embodiment, the second resonant current I2 flows from the first free end 1111 to the second free end 1112 as an example for illustration. In addition, in order to clearly illustrate the direction of the second resonant current I2, in the schematic diagram of this embodiment, the second resonant current I2 is marked next to the first radiator 111 for illustration, which can be understood that it should not be understood as a limitation of the second resonant current I2 in the antenna assembly 10 provided in the embodiment of the present application. It can be understood that under the same resonant mode, the resonant current of each radiator will change in different half-wavelength periods. In the current wavelength period, when the first antenna 110 supports the second resonant mode, the second resonant current I2 is excited on the first radiator 111, and the second resonant current I2 flows from the first free end 1111 to the second free end 1112. In the next half-wavelength period, when the first antenna 110 supports the second resonance mode, the second resonance current I2 excited on the first radiator 111 flows from the second free end 1112 to the first free end 1111. It can be understood that, Figure 5 The second resonant current I2 and Figure 4 The first resonant current I1 shown in is in the same half wavelength period.

[0059] In the antenna assembly 10 provided in this embodiment, the half-wavelength mode from the first free end 1111 to the second free end 1112 in the first radiator 111 is utilized as the second resonant mode to support the first target frequency band. Therefore, the mode of the first radiator 111 can be fully excited and utilized to improve the antenna performance of the first antenna 110 when supporting the first target frequency band.

[0060] See also Figure 6 , Figure 6 This is a schematic diagram of an antenna assembly provided in another embodiment of the present application. The first antenna 110 further includes a tuning circuit 112 , the tuning circuit 112 is electrically connected to the first feeding point P1 , and the tuning circuit 112 is used to adjust the first target frequency band.

[0061] In the antenna assembly 10 provided in the embodiment of the present application, the first antenna 110 also includes a tuning circuit 112, the tuning circuit 112 is electrically connected to the first feeding point P1, and the tuning circuit 112 is used to adjust the first target frequency band. For example, the tuning circuit 112 can adjust the electrical length of the first radiator 111 according to a preset tuning parameter (such as at least one of an inductance value and a capacitance value), thereby adjusting the first target frequency band supported by the first radiator 111. It should be noted that the tuning circuit 112 can also adjust the electrical length of the first radiator 111 according to the preset tuning parameters, so that the electrical length of the first radiator 111 matches the electrical length required for the supported first target frequency band.

[0062] See also Figure 7 , Figure 7 An implementation method provided Figure 6 Schematic diagram of equivalent circuit of antenna assembly shown. The tuning circuit 112 includes a switch unit 112a, a first capacitor C1, a second capacitor C2, a third capacitor C3, a first inductor L1 and a second inductor L2. The switch unit 112a has a common terminal 1120 (also referred to as RFC), a first terminal 1121 (also referred to as RF1), a second terminal 1122 (also referred to as RF2), a third terminal 1123 (also referred to as RF3) and a fourth terminal 1124 (also referred to as RF4), and the common terminal 1120 is electrically connected to the first feeding point P1. One end of the first capacitor C1 is electrically connected to the first feed source S1, and the other end of the first capacitor C1 is electrically connected to the first feeding point P1. One end of the second capacitor C2 is electrically connected to the first feed source S1, and the other end of the second capacitor C2 is electrically connected to the first terminal 1121. One end of the third capacitor C3 is electrically connected to the third terminal 1123, and the other end of the third capacitor C3 is grounded. One end of the first inductor L1 is electrically connected to the first feeding point P1, and the other end of the first inductor L1 is electrically connected to the fourth end 1124. One end of the second inductor L2 is electrically connected to the fourth end 1124, and the other end of the second inductor L2 is grounded. The common end 1120 can be electrically connected to at least one of the first end 1121, the second end 1122, and the fourth end 1124, and the common end 1120 can be electrically disconnected from the first end 1121, the second end 1122, the third end 1123, and the fourth end 1124 to adjust the first target frequency band.

[0063] In this embodiment, the switch unit 112a is a single-pole four-throw switch (SP4T) for illustration, which is understandable and should not be construed as limiting the embodiments of the present application. In other embodiments, the switch unit 112a may be a single-pole n-throw switch (SPnT).

[0064] The common terminal 1120 can be electrically connected to the first terminal 1121 and can also be electrically disconnected from the first terminal 1121; the common terminal 1120 can be electrically connected to the second terminal 1122 and can also be electrically disconnected from the second terminal 1122; the common terminal 1120 can be electrically connected to the third terminal 1123 and can also be electrically disconnected from the third terminal 1123; the common terminal 1120 can be electrically connected to the fourth terminal 1124 and can also be electrically disconnected from the fourth terminal 1124. It should be noted that the electrical connection relationship between the common terminal 1120 and one of the first terminal 1121, the second terminal 1122, the third terminal 1123 and the fourth terminal 1124 will not affect the electrical connection relationship between the common terminal 1120 and another of the first terminal 1121, the second terminal 1122, the third terminal 1123 and the fourth terminal 1124. For example, when the common terminal 1120 is electrically connected to the Nth terminal, the common terminal 1120 may be electrically connected to the Mth terminal or the common terminal 1120 may be electrically disconnected from the Mth terminal, wherein N is equal to one of one, two, three, and four, M is another of one, two, three, and four, and M is not equal to N. For example, when the common terminal 1120 is electrically connected to the first terminal 1121, the common terminal 1120 may be electrically connected to the second terminal 1122 or the common terminal 1120 may be electrically disconnected from the second terminal 1122.

[0065] By adjusting the electrical connection relationship between the common end 1120 and the first end 1121 , the second end 1122 , the third end 1123 and the fourth end 1124 , the tuning circuit 112 has different tuning parameters, thereby adjusting the first target frequency band.

[0066] It should be noted that the tuning circuit 112 in the schematic diagram of this embodiment is only an example of one case of the tuning circuit 112. It can be understood that there may be other matching devices (also called matching) on ​​the feed path from the first feed source S1 to the first feeding point P1. In order to clearly illustrate the tuning circuit 112 in the embodiment of the present application, some matching devices are omitted and only important matching devices in the tuning circuit 112 are illustrated. In the schematic diagram of this embodiment, the third end 1123 of the switch unit 112a in the tuning circuit 112 is not electrically connected to a matching device. In other embodiments, the third end 1123 may be electrically connected to a matching device (such as a capacitor, or an inductor, or a combination of a capacitor and an inductor).

[0067] In combination with the tuning circuit 112 described above, the specific situation of the tuning circuit 112 in the antenna assembly 10 provided in the embodiment of the present application is introduced. When the electronic device 1 is in free space or in the left hand or the right hand, and when the common end 1120 is electrically connected to the second end 1122, and the common end 1120 is electrically disconnected from the first end 1121, the third end 1123 and the fourth end 1124 respectively, the first antenna 110 supports the first frequency band in the first target frequency band.

[0068] In this embodiment, the electronic device 1 being in free space (FS) refers to the state when the electronic device 1 is placed on a carrier (such as a desktop) and is not held by the user. The electronic device 1 being in the left head-hand state refers to the state when the electronic device 1 is held by the user's hand and placed on the left side of the head, referred to as BHHL. The electronic device 1 being in the right head-hand state refers to the state when the electronic device 1 is held by the user's hand and placed on the right side of the head, referred to as BHHR.

[0069] See also Figure 8 and Fig. 9 , Figure 8 A circuit diagram of an electronic device provided in one embodiment of the present application; Fig. 9 for Figure 8A table of correspondence between the state of the switch unit when the electronic device is in various states and the various frequency bands of the first target frequency band supported by the first antenna. In one embodiment, the electronic device 1 also includes a handset 150, a distance sensor 160, a posture sensor 170 and a controller 180. The distance sensor 160 may be, but is not limited to, a proximity distance sensor 160. The distance sensor 160 is used to detect the distance between the user and the electronic device 1 to obtain a detection signal, and the controller 180 determines whether the user is close to the electronic device 1 based on the detection signal. For example, when the controller 180 determines that the distance between the electronic device 1 and the user is less than or equal to a preset distance (such as 3 cm, or 5 cm, etc.) based on the detection signal detected by the distance sensor 160, it is determined that the electronic device 1 is close to the user. In addition, the controller 180 is also used to determine whether the handset 150 is working (for example, the handset 150 is determined to be working when the handset 150 is turned on, and the handset 150 is determined to be not working when the handset 150 is not turned on). When the handset 150 is working and the controller 180 determines that the distance between the user and the electronic device 1 is less than or equal to the preset distance according to the detection signal detected by the distance sensor 160, the controller 180 determines that the electronic device 1 is in the head-hand mode. When the electronic device 1 is in the head-hand mode, it includes the electronic device 1 being in the left head-hand mode and the right head-hand mode. When the electronic device 1 is in the left head-hand mode, the corresponding scene may be, but not limited to, the user holding the electronic device 1 with his hand and placing the electronic device 1 on the left side of the user's head to answer a call. When the electronic device 1 is in the right head-hand mode, the corresponding scene may be, but not limited to, the user holding the electronic device 1 with his hand and placing the electronic device 1 on the right side of the user's head to answer a call. When the controller 180 determines that the distance between the electronic device 1 and the user is greater than the preset distance according to the detection signal detected by the distance sensor 160, the electronic device 1 is determined to be in a free space. It can be understood that this embodiment is only an embodiment for determining that the electronic device 1 is in a free space, a left hand, or a right hand, and should not be understood as a limitation on the embodiments of the present application.

[0070] The posture sensor 170 is used to detect the posture of the electronic device 1 , and the controller 180 is electrically connected to the posture sensor 170 to determine whether the electronic device 1 is in a horizontal state according to a signal detected by the posture sensor 170 .

[0071] exist Fig. 9In the figure, FS indicates that the electronic device 1 is in free space, BHHL indicates that the electronic device 1 is in the left head and hand state, BHHR indicates that the electronic device 1 is in the right head and hand state, and the landscape state indicates that the electronic device 1 is in the landscape state and is held by the user's hand. It can be understood that when the electronic device 1 includes a Universal Serial Bus (USB) interface, when the electronic device 1 is in the landscape state, the USB port of the electronic device 1 is usually facing right, so the landscape state of the electronic device 1 is also called landscape mode, or USB right state, or UBS right state.

[0072] Since one end of the first capacitor C1 is electrically connected to the first feed source S1, and the other end of the first capacitor C1 is electrically connected to the first feed point P1, the first capacitor C1 is always electrically connected between the first feed source S1 and the first feed point P1 regardless of the electrical connection relationship between the common terminal 1120 and the first terminal 1121, the second terminal 1122, the third terminal 1123, and the fourth terminal 1124. When the electronic device 1 is in free space or in the left hand or the right hand, and when the common terminal 1120 is electrically connected to the second terminal 1122, and the common terminal 1120 is electrically disconnected from the first terminal 1121, the third terminal 1123, and the fourth terminal 1124, respectively, the first antenna 110 supports the first frequency band in the first target frequency band.

[0073] The first frequency band may be, but is not limited to, a B28 frequency band, or an N28 frequency band.

[0074] Please refer again Fig. 9 When the electronic device 1 is in a horizontal state, when the common end 1120 is electrically connected to the first end 1121, and the common end 1120 is electrically connected to the second end 1122, the first antenna 110 supports the first frequency band in the first target frequency band.

[0075] In this embodiment, the common end 1120 is electrically connected to the first end 1121, the common end 1120 is electrically connected to the second end 1122, the common end 1120 is electrically disconnected from the third end 1123, and the common end 1120 is electrically disconnected from the fourth end 1124, so the second capacitor C2 is electrically connected to the path between the first feed source S1 and the first radiator 111, and the third capacitor C3 is electrically connected to the path between the first feed source S1 and the first radiator 111.

[0076] Compared with when the electronic device 1 is in free space, or in the left hand, or in the right hand, the environment when the electronic device 1 is in the landscape state has changed. Therefore, when the electronic device 1 is in the landscape state, the common end 1120 is electrically connected to the second end 1122 to connect the third capacitor C3 to reduce or even avoid frequency deviation due to environmental changes when the electronic device 1 supports the first frequency band.

[0077] Please refer again Fig. 9 When the electronic device 1 is in free space or in the left hand or the right hand, and when the common end 1120 is electrically disconnected from the first end 1121, the second end 1122, the third end 1123 and the fourth end 1124, the first antenna 110 supports the second frequency band of the first target frequency band.

[0078] The common end 1120 is electrically disconnected from the first end 1121, the second end 1122, the third end 1123 and the fourth end 1124. Therefore, only the first capacitor C1 is electrically connected to the path between the first feed source S1 and the first radiator 111. At this time, the tuning parameter of the tuning circuit 112 is the first capacitor C1, and the first antenna 110 supports the second frequency band of the first target frequency band.

[0079] In this implementation, the second frequency band is the B5 frequency band.

[0080] When the electronic device 1 is in a horizontal state, and when the common end 1120 is electrically connected to the first end 1121, and the common end 1120 is electrically disconnected from the second end 1122, the third end 1123 and the fourth end 1124 respectively, the first antenna 110 supports the second frequency band of the first target frequency band.

[0081] Compared with when the electronic device 1 is in free space, or in the left hand, or the right hand, the environment when the electronic device 1 is in the landscape state has changed. Therefore, when the electronic device 1 is in the landscape state, the common end 1120 is electrically connected to the first end 1121 to connect the second capacitor C2 to reduce or even avoid frequency deviation due to environmental changes when the electronic device 1 supports the second frequency band.

[0082] When the electronic device 1 is in free space, when the common end 1120 is electrically connected to the fourth end 1124, and the common end 1120 is electrically disconnected from the first end 1121, the second end 1122 and the third end 1123 respectively, the first antenna 110 supports the third frequency band of the first target frequency band.

[0083] When the common end 1120 is electrically connected to the fourth end 1124, the common end 1120 is electrically disconnected from the first end 1121, the common end 1120 is electrically disconnected from the second end 1122, and the common end 1120 is electrically disconnected from the third end 1123, the first antenna 110 supports the third frequency band of the first target frequency band.

[0084] In this implementation, the third frequency band is the B8 frequency band.

[0085] It can be seen that the electronic device 1 provided in the embodiment of the present application can control the electrical connection relationship between the common end 1120 and the first end 1121, the second end 1122, the third end 1123 and the fourth end 1124 according to the state of the electronic device 1 so that the first antenna 110 supports different frequency bands.

[0086] When the electronic device 1 is in the left hand or the right hand, and when the common end 1120 is electrically connected to the first end 1121 and the fourth end 1124 respectively, and the common end 1120 is electrically disconnected from the second end 1122 and the third end 1123 respectively, the first antenna 110 supports the third frequency band of the first target frequency band.

[0087] Compared with the case where the electronic device 1 is in free space, the environment changes when the electronic device 1 is in the left hand or the right hand. Therefore, when the electronic device 1 is in the left hand or the right hand, the common end 1120 is not only electrically connected to the fourth end 1124, but also electrically connected to the first end 1121 to connect the second capacitor C2, so as to reduce or even avoid frequency deviation due to environmental changes when the electronic device 1 supports the third frequency band.

[0088] When the electronic device 1 is in a horizontal screen state, and when the common end 1120 is electrically connected to the first end 1121, and the common end 1120 is electrically disconnected from the second end 1122, the third end 1123 and the fourth end 1124 respectively, the first antenna 110 supports the third frequency band of the first target frequency band.

[0089] Compared with when the electronic device 1 is in free space, or in the left hand, or the right hand, the environment when the electronic device 1 is in the landscape state has changed. Therefore, when the electronic device 1 is in the landscape state, the common end 1120 is only electrically connected to the first end 1121 to connect the second capacitor C2 to reduce or even avoid frequency deviation due to environmental changes when the electronic device 1 supports the third frequency band.

[0090] The electronic device 1 provided in the embodiment of the present application is described by taking the first antenna 110 supporting the third frequency band as an example. When the first antenna 110 supports the third frequency band (for example, the B8 frequency band), when the electronic device 1 is in free space, and the common terminal 1120 is only electrically connected to the fourth terminal 1124, and the common terminal 1120 in the switch unit 112a is electrically disconnected from the first terminal 1121, the second terminal 1122, and the third terminal 1123, and if the parasitic effect of the switch unit 112a is not considered, the tuning circuit 112 (also called matching) is connected in series with the first capacitor C1 (for example, 1.5pF), and in parallel with the second inductor L2 (for example, 18nH), and is capacitively fed. When the electronic device 1 is in the head-hand state (including the left head-hand and the right head-hand), in the switch unit 112a, in addition to the common terminal 1120 being electrically connected to the fourth terminal 1124, the common terminal 1120 is also electrically connected to the first terminal 1121, the common terminal 1120 is electrically disconnected from the second terminal 1122, and the common terminal 1120 is electrically disconnected from the third terminal 1123. Ignoring the parasitic capacitance of the switch unit 112a, the tuning circuit 112 (also called matching) is connected in parallel with the second inductor L2, and in series with the first capacitor C1 (for example, 1.5pF) and the second capacitor C2 (for example, 1.8pF), wherein the total value of the series connection of the first capacitor C1 (for example, 1.5pF) and the second capacitor C2 (for example, 1.8pF) is the sum of the capacitance value of the first capacitor C1 and the capacitance value of the second capacitor C2. When the electronic device 1 is in the horizontal screen state, the common terminal 1120 is electrically connected to the first terminal 1121, and the common terminal 1120 is electrically disconnected from the second terminal 1122, the common terminal 1120 is electrically disconnected from the third terminal 1123, and the common terminal 1120 is electrically disconnected from the fourth terminal 1124. Without considering the parasitic effect of the switch unit 112a, the tuning circuit 112 (also called matching) is a first inductor L1 and a second inductor L2 in parallel, and a first capacitor C1 and a second capacitor C2 in series. For example, the first inductor L1 is 43nH, the second inductor L2 is 18nH, the first capacitor C1 is 1.5pF, and the second capacitor C2 is 1.8pF. Therefore, the tuning circuit 112 (also called matching) is 43nH+18nH in parallel and 3.3pF (1.5pF+1.8pF) in series.

[0091] It is understandable that in one embodiment, the capacitance value of the first capacitor C1 is 1.5pF, the capacitance value of the second capacitor C2 is 1.8pF, the capacitance value of the third capacitor C3 is 1.5pF, the inductance value of the first inductor L1 is 43nH, and the inductance value of the second inductor L2 is 18nH. It is understandable that the first capacitor C1, the second capacitor C2, the third capacitor C3, the first inductor L1 and the second inductor L2 can also be selected as other values.

[0092] See also Fig.10 , Fig.10 for Figure 7 The S parameter diagram of the first frequency band, the second frequency band and the third frequency band of the first target frequency band supported by the first antenna of the antenna assembly shown in . In this diagram, the horizontal axis is the frequency, the unit is GHz, and the vertical axis is dB. Among them, curve ① is the S parameter curve of the first frequency band of the first antenna 110 of the antenna assembly 10 supporting the first target frequency band; curve ② is the S parameter curve of the second frequency band of the first antenna 110 of the antenna assembly 10 supporting the first target frequency band; curve ③ is the S parameter curve of the third frequency band of the first antenna 110 of the antenna assembly 10 supporting the first target frequency band. It can be seen from curve ①, curve ② and curve ③ respectively that the first antenna 110 has dual resonance (i.e., the first resonance mode and the second resonance mode) when supporting the first frequency band, the first antenna 110 has dual resonance (i.e., the first resonance mode and the second resonance mode) when supporting the second frequency band, and the first antenna 110 has dual resonance (i.e., the first resonance mode and the second resonance mode) when supporting the second frequency band.

[0093] It can be seen that under the action of the switch unit 112a, the first target frequency band can be effectively tuned. In this schematic diagram, the first frequency band is the B28 frequency band or the N28 frequency band, the second frequency band is the B5 frequency band, and the third frequency band is the B8 frequency band. It can be understood that it should not be understood as a limitation on the first frequency band, the second frequency band and the third frequency band in the first target frequency band supported by the first antenna 110 of the antenna assembly 10 provided in this application. In other words, under the action of the switch unit 112a, the low-frequency band can be effectively tuned so that the first antenna can cover all frequency bands of 703MHz-960MHz, or even lower, so that the conventional low-frequency band is better covered.

[0094] See also Fig.11 , Fig.11Schematic diagram of an antenna assembly provided in another embodiment of the present application. The first radiator 111 further has a connection point P4. The connection point P4 is closer to the second free end 1112 than the first grounding point P0. The first antenna 110 further includes an excitation inductor L0, one end of which is electrically connected to the connection point P4 and the other end is grounded.

[0095] In this embodiment, the first antenna 110 includes an excitation inductor L0, which can better excite the first resonance mode and the second resonance mode supporting the first target frequency band. In addition, the excitation inductor L0 is electrically connected to the connection point P4 of the first radiator 111, which can also better excite the first resonance mode and the second resonance mode supporting the first target frequency band.

[0096] The excitation inductor L0 is a conductive lead or an inductor. Fig.11 In the provided antenna assembly 10, the excitation inductor L0 is a conductive lead as an example for illustration; the conductive lead may be, but is not limited to, a metal thin wire, and the conductive lead may be equivalent to an inductor. When the first radiator 111 is a radiator formed on a metal middle frame, and when the excitation inductor L0 is a conductive lead, the metal thin wire may be processed on the middle frame of the electronic device 1, the processing method is simple, and does not need to occupy a large space inside the electronic device 1. Therefore, the electronic device 1 also has a large space for arranging a large-capacity battery. The method of processing the conductive lead on the middle frame of the electronic device 1 may be, but is not limited to, processing by a computerized numerical control (CNC) machine tool. In addition, when the first radiator 111 is a radiator formed on a metal middle frame, the middle frame includes a frame body and a frame portion surrounding the periphery of the frame body, and a gap is partially set between the frame portion and the frame body to form the first radiator 111. When the excitation inductor L0 is a conductive lead, the conductive lead and the first radiator 111 may be an integral structure. In addition, the conductive lead may be located in a gap between the frame portion and the frame body.

[0097] When the excitation inductor L0 is an inductor, the inductor is disposed on a circuit board and electrically connected to the connection point P4.

[0098] The first target frequency band is a low frequency band, and the inductance value L0 of the excitation inductor L0 satisfies: 2nH≤L0≤10nH.

[0099] The inductance value of the excitation inductor L0 satisfies: 2nH≤L0≤10nH. The excitation inductor L0 is more likely to excite the first resonant mode and the second resonant mode of the first target frequency band, thereby enabling the first antenna 110 to have a larger bandwidth when supporting the first target frequency band.

[0100] Please refer again Figure 2 and Fig.12 , Fig.12 A schematic diagram of current distribution when the first antenna in the antenna assembly supports the third resonance mode provided in an embodiment of the present application: The first feed source S1 further excites the first radiator 111 to generate a third resonance mode supporting the second target frequency band.

[0101] In this embodiment, the first feed source S1 also excites the first radiator 111 to generate a third resonance supporting the second target frequency band. Therefore, the first antenna 110 can not only support the first target frequency band, but also support the second target frequency band. Therefore, the first antenna 110 can support a larger frequency band and has better communication performance.

[0102] Please continue reading Figure 3 , it can be seen that the antenna assembly 10 provided in the embodiment of the present application can not only support the dual resonance of the first target frequency band, but also support the second target frequency band, which is the Bluetooth frequency band or the WiFi frequency band. In addition, it can be seen from this simulation diagram that the total system efficiency when supporting the Bluetooth frequency band can be above -5dB.

[0103] The third resonance mode is a quarter-wavelength mode from the first feeding point P1 to the first free end 1111 .

[0104] The current corresponding to the third resonant mode is the third resonant current I3, and the third resonant current I3 is distributed between the first feeding point P1 and the first free end 1111. In the schematic diagram of this embodiment, the third resonant current I3 flowing from the first feeding point P1 to the first free end 1111 is used as an example for illustration. In addition, in order to clearly illustrate the direction of the third resonant current I3, in the schematic diagram of this embodiment, the third resonant current I3 is marked next to the first radiator 111 for illustration, which can be understood that it should not be understood as a limitation of the third resonant current I3 in the antenna assembly 10 provided in the embodiment of the present application. It can be understood that under the same resonant mode, the resonant current excited on each radiator in different half-wavelength periods will change. In the current half-wavelength period, when the first antenna 110 supports the third resonant mode, the third resonant current I3 is excited on the first radiator 111, and the third resonant current I3 flows from the first feeding point P1 to the first free end 1111. In the next half-wavelength period, when the first antenna 110 supports the third resonance mode, a third resonance current I3 is excited on the first radiator 111, and the third resonance current I3 flows from the first free end 1111 to the first feeding point P1. It should be noted that the third resonance current I3 shown in the schematic diagram of this embodiment Figure 5 The second resonant current I2 and Figure 4 The first resonant currents I1 shown in FIG. 1 are all in the same half-wavelength period.

[0105] It should be noted that the "wavelength" of the "quarter-wavelength mode" mentioned in "the third resonant mode is a quarter-wavelength mode from the first feeding point P1 to the first free end 1111" refers to the wavelength corresponding to the center frequency point of the second target frequency band corresponding to the third resonant mode.

[0106] The quarter-wavelength mode is also called the fundamental mode. The third resonant mode is a quarter-wavelength mode from the first feeding point P1 to the first free end 1111, that is, the first feed source S1 also excites the first radiator 111 to operate in the fundamental mode when supporting the second target frequency band. The antenna assembly 10 has a higher radiation efficiency when supporting the second target frequency band.

[0107] See also Fig.13 , Fig.13A schematic diagram of an antenna assembly provided in another embodiment of the present application. The antenna assembly 10 further includes a second antenna 120, and the second antenna 120 includes a second radiator 121, a third radiator 122, and a second feed source S2. The second radiator 121 has a third free end 1211, a first grounding end 1212, and a second feeding point P2 located between the third free end 1211 and the first grounding end 1212, and the first grounding end 1212 is grounded. The third radiator 122 has a fourth free end 1221 and a second grounding end 1222, the fourth free end 1221 is spaced apart from the third free end 1211 and forms a first gap 122a, the third radiator 122 is coupled to the second radiator 121 through the first gap 122a, the second grounding end 1222 is spaced apart from the first free end 1111 of the first radiator 111 and forms a second gap 122b, and the second grounding end 1222 is grounded. The second feed source S2 is electrically connected to the second feeding point P2 to excite the second radiator 121 and the third radiator 122 to jointly support a third target frequency band.

[0108] It should be noted that the antenna assembly 10 shown in the schematic diagram of this embodiment is illustrated by taking the example that the antenna assembly 10 also includes a second antenna 120 combined with the schematic diagram of the previous embodiment. It can be understood that the antenna assembly 10 also includes a second antenna 120 which can be combined with the antenna assembly 10 provided in any of the previous embodiments.

[0109] The second antenna 120 may be, but is not limited to, a middle high band (MHB) antenna. In other words, the third target frequency band is a middle high band.

[0110] The second radiator 121 can be a laser direct structuring (LDS) radiator, or a flexible printed circuit (FPC) radiator, or a print direct structuring (PDS) radiator, or a metal branch radiator. When the antenna assembly 10 is applied to the electronic device 1, the second radiator 121 can be a mechanical design antenna (MDA) radiator designed using the metal insert of the electronic device 1 itself. For example, the second radiator 121 can be an antenna radiator designed using the middle frame formed by the plastic and metal of the electronic device 1. In addition, the second radiator 121 can also be a radiator of a metal frame antenna designed with a metal middle frame.

[0111] It is understandable that the present application does not specifically limit the shape, structure and material of the second radiator 121. The shapes of the second radiator 121 include but are not limited to bent, straight, L-shaped, sheet-shaped, rod-shaped, coated, thin film, etc. When the second radiator 121 is in a strip shape, the present application does not limit the extension trajectory of the second radiator 121, so the second radiator 121 can extend in a straight line, a curve, a multi-stage bend, etc. The second radiator 121 can be a line with uniform width on the extension trajectory, or it can be an irregular shape with different widths such as a gradient width and a widened area. The type of the second radiator 121 can be the same as or different from the type of the first radiator 111, which is not limited in this embodiment.

[0112] The third radiator 122 can be a laser direct structuring (LDS) radiator, or a flexible printed circuit (FPC) radiator, or a print direct structuring (PDS) radiator, or a metal branch radiator. When the antenna assembly 10 is applied to the electronic device 1, the third radiator 122 can be a mechanical design antenna (MDA) radiator designed using the metal insert of the electronic device 1 itself. For example, the third radiator 122 can be an antenna radiator designed using the middle frame formed by the plastic and metal of the electronic device 1. In addition, the third radiator 122 can also be a radiator of a metal frame antenna designed with a metal middle frame.

[0113] It is understandable that the present application does not specifically limit the shape, structure and material of the third radiator 122. The shapes of the third radiator 122 include but are not limited to bent, straight, L-shaped, sheet-shaped, rod-shaped, coated, thin film, etc. When the third radiator 122 is in a strip shape, the present application does not limit the extension trajectory of the third radiator 122, so the third radiator 122 can extend in a straight line, a curve, a multi-stage bend, etc. The third radiator 122 can be a line with uniform width on the extension trajectory, or it can be an irregular shape with different widths such as a gradual width and a widened area. The type of the third radiator 122 can be the same as or different from the type of the first radiator 111, which is not limited in this embodiment.

[0114] The second feed source S2 may be electrically connected to the second feed point P2 by, but is not limited to, direct electrical connection (such as welding) or indirect electrical connection to the second feed point P2 by coaxial line, microstrip line, conductive spring, conductive glue, etc.

[0115] The first grounding terminal 1212 may be grounded in a manner that is, but not limited to, electrically connected to the ground electrode of the electronic device 1 through a coaxial line, a microstrip line, a conductive spring, a conductive adhesive, etc. It can be understood that the ground electrode of the electronic device 1 may be, but not limited to, a grounding layer of a circuit board in the electronic device 1, or a shielding member of a display screen of the electronic device 1, or a middle frame of the electronic device 1. This embodiment does not limit the specific form of the ground electrode of the electronic device 1.

[0116] The second grounding terminal 1222 may be grounded in a manner that is, but not limited to, electrically connected to the ground electrode of the electronic device 1 through a coaxial line, a microstrip line, a conductive spring, a conductive adhesive, etc. It can be understood that the ground electrode of the electronic device 1 may be, but not limited to, a grounding layer of a circuit board in the electronic device 1, or a shielding member of a display screen of the electronic device 1, or a middle frame of the electronic device 1. This embodiment does not limit the specific form of the ground electrode of the electronic device 1.

[0117] In this embodiment, the second antenna 120 further includes a matching circuit M. One end of the matching circuit M is electrically connected to the second ground terminal 1222, and the other end of the matching circuit M is grounded. The matching circuit M may include passive matching such as one or more of a capacitor, an inductor, a series connection of a capacitor and an inductor, or a parallel connection of a capacitor and an inductor; or a capacitor, an inductor, a resistor, etc. connected by a switch to tune the third target frequency band.

[0118] The matching circuit M is used to adjust the third target frequency band supported by the second antenna 120. It can be understood that in other embodiments, the second antenna 120 may not include the matching circuit M. The antenna assembly 10 provided in the embodiment of the present application does not limit whether the second antenna 120 includes the matching circuit M.

[0119] In one embodiment, the second radiator 121 is adjacent to the microphone (SPK) of the electronic device 1, and the third radiator 122 is disposed adjacent to the USB port of the electronic device 1. It is understandable that in other embodiments, the second radiator 121 and the third radiator 122 may also be disposed at other positions of the electronic device 1.

[0120] See also Fig.14 and Fig.15 , Fig.14 A schematic diagram of an antenna assembly provided in another embodiment of the present application; Fig.15 To include Fig.14The circuit diagram of the electronic device of the antenna assembly shown in the figure. In addition to the first antenna 110, the antenna assembly 10 also includes a third antenna 130 and a fourth antenna 140. The third antenna 130 and the fourth antenna 140 are both spaced apart from the first antenna 110, and the third antenna 130 and the fourth antenna 140 both support the second target frequency band. The electronic device 1 also includes a controller 180. When the signal strength of one of the third antenna 130 and the fourth antenna 140 when supporting the second target frequency band is less than or equal to the preset strength, the controller 180 turns off the one of the third antenna 130 and the fourth antenna 140, and controls the first antenna 110 to support the second target frequency band, wherein the signal strength of the first antenna 110 antenna assembly 10 when supporting the second target frequency band is greater than the preset strength, so as to support the dual channel of the second target frequency band together with the other of the third antenna 130 and the fourth antenna 140.

[0121] In the schematic diagram of the present embodiment, the antenna assembly 10 includes the first antenna 110, the second antenna 120, the third antenna 130 and the fourth antenna 140 as an example. It is understandable that in other embodiments, the antenna assembly 10 may not include the second antenna 120. It is understandable that in the schematic diagram of the present embodiment, the antenna assembly 10 includes the third antenna 130 and the fourth antenna 140 and is combined with the first antenna 110 as an example. It is understandable that the antenna assembly 10 includes the third antenna 130 and the fourth antenna 140 and can be combined with the first antenna 110 provided in any of the above embodiments. In the schematic diagram of the present embodiment, the first antenna 110 includes the tuning circuit 112 and the excitation inductor L0 as an example. It is understandable that in other embodiments, the first antenna 110 also does not include the tuning circuit 112 and / or the excitation inductor L0. It is understandable that the structure and position of the third antenna 130 and the fourth antenna 140 should not be understood as limiting the embodiments of the present application.

[0122] Since the third antenna 130 and the fourth antenna 140 in the antenna assembly 10 both support the second target frequency band, the third antenna 130 and the fourth antenna 140 can be referred to as the first antenna and the second antenna supporting the second target frequency band. The first antenna 110 also supports the second target frequency band, so the first antenna 110 is also referred to as the third antenna supporting the second target frequency band. When the second target frequency band is a Bluetooth frequency band, the third antenna 130 and the fourth antenna 140 are respectively referred to as the first Bluetooth antenna and the second Bluetooth antenna; the first antenna 110 is also referred to as the third Bluetooth antenna. When the second target frequency band is a WiFi frequency band, the third antenna 130 and the fourth antenna 140 are respectively referred to as the first WiFi antenna and the second WiFi antenna; the first antenna 110 is also referred to as the third WiFi antenna.

[0123] The third antenna 130 and the fourth antenna 140 are both spaced apart from the first antenna 110. When one of the third antenna 130 and the fourth antenna 140 is blocked and its performance is degraded, for example, when the signal strength of one of the third antenna 130 and the fourth antenna 140 when supporting the second target frequency band is less than or equal to the preset strength, the controller 180 turns off the one of the third antenna 130 and the fourth antenna 140, and controls the first antenna 110 to support the second target frequency band, so that the first antenna 110, and the other of the third antenna 130 and the fourth antenna 140 jointly support the dual channels of the second target frequency band, so that the antenna assembly 10 has better communication effect and antenna performance when supporting the second target frequency band.

[0124] In one embodiment, the first antenna 110 is disposed at the bottom of the electronic device 1, and the third antenna 130 and the fourth antenna 140 are disposed at the top of the electronic device 1. For example, when the electronic device 1 to which the antenna assembly 10 is applied is placed with the top facing downward into a pocket of a user's clothing, the third antenna 130 and the fourth antenna 140 will be blocked, and the performance of at least one of the third antenna 130 and the fourth antenna 140 when supporting the second target frequency band will be reduced. In this case, the controller 180 controls the first antenna 110 and the other of the third antenna 130 and the fourth antenna 140 to jointly support the dual channels of the second target frequency band, so that the electronic device 1 still has a good communication effect and antenna performance in the second target frequency band.

[0125] For example, as the application scenarios of the electronic device 1 increase, the services for the electronic device 1 to communicate with the earphones also increase. For example, the earphones and the electronic device 1 can communicate using electromagnetic wave signals in the second target frequency band, such as listening to music. In one scenario, when the top of the electronic device 1 is placed face down in the pocket of the user's clothes, the connection between the third antenna 130 and the fourth antenna 140 located at the top of the electronic device 1 and the earphones will be blocked by the user, resulting in a large attenuation of the second target frequency band, which seriously affects the user's experience of listening to music with the earphones. In this case, the controller 180 turns off one of the third antenna 130 and the fourth antenna 140, and controls the first antenna 110 to support the second target frequency band, so that the first antenna 110, and the other of the third antenna 130 and the fourth antenna 140 jointly support the dual channels of the second target frequency band, so that the antenna assembly 10 has better communication effect and antenna performance when supporting the second target frequency band.

[0126] In one implementation, the first target frequency band is a low frequency band, and the second target frequency band is a Bluetooth frequency band or a WiFi frequency band.

[0127] The first antenna 110 in the antenna assembly 10 provided in this embodiment is compatible with a low-frequency band, and one of the Bluetooth band or the WiFi band. Therefore, the antenna assembly 10 can operate in a low-frequency band, and can also operate in one of the Bluetooth band or the WiFi band. Therefore, it has better communication effect and antenna performance.

[0128] The antenna assembly 10 in the related art usually uses a single resonance to support the first target frequency band. When the antenna assembly 10 is in a human hand or head-hand scenario, it will affect the antenna assembly 10, causing the frequency band supported by the antenna assembly 10 to deviate from the first target frequency band and fail to cover the full bandwidth of the first target frequency band. Therefore, the performance of the antenna assembly 10 in the first target frequency band is reduced. For example, the total system efficiency after the reduction is -12dB, which is 5dB lower than that in the free space scenario.

[0129] Compared with the related art that uses a single resonant mode to support the first target frequency band, the first antenna 110 of the antenna assembly 10 provided in the embodiment of the present application has a first resonant mode and a second resonant mode in the first target frequency band, so the first antenna 110 has a larger bandwidth in the first target frequency band. In scenarios such as human hands, head and hands, even if the first antenna 110 has a frequency deviation when supporting the first target frequency band, the frequency band supported by the first antenna 110 after the frequency deviation also falls within the range of the first target frequency band. Therefore, the antenna assembly 10 of the electronic device 1 has a strong energy to resist the frequency deviation caused by the human body effect when supporting the first target frequency band, and therefore has better performance for human heads and hands, and has better communication performance.

[0130] In addition, the first antenna 110 in the antenna assembly 10 provided in one embodiment of the present application includes a tuning circuit 112, and the tuning circuit 112 has different tuning parameters by controlling the connection mode of the tuning switch, so that when the electronic device 1 used by the antenna assembly 10 is in a human hand, or a head and hand, or in a horizontal screen state, the influence of the human body on the first target frequency band supported by the antenna assembly 10 caused by the frequency deviation is reduced or even avoided in scenarios such as a head and hand or a horizontal screen. Please refer to Fig.16 , Fig.16 A schematic diagram of the efficiency of the first antenna of the antenna assembly provided in one embodiment of the present application in different frequency bands and states. In the schematic diagram of the present embodiment, FS represents free space, BHHL represents the left hand, and BHHR represents the right hand. The simulation is performed by taking the first frequency band as the B28 frequency band, the second frequency band as the B5 frequency band, and the third frequency band as the B8 frequency band as an example. It can be understood that it should not be understood as a limitation on the antenna assembly 10 provided in the embodiment of the present application. It can be seen from this schematic diagram that when the electronic device 1 is in the three scenarios of left hand, right hand, or horizontal screen state, the efficiency of the antenna assembly 10 in the first frequency band, the second frequency band and the third frequency band are all about -10dB, and the performance is good.

[0131] Next, use the Smith chart to compare Fig. 9 The performance of the electronic device 1 to which the antenna assembly 10 described in its related embodiments is applied and adopts corresponding switching logic in various postures is introduced.

[0132] See also Fig.17 , Fig.17The Smith chart is a diagram showing a third frequency band supported by the electronic device used by the antenna assembly when it is in the left head-hand state and is the B8 frequency band. In the schematic diagram, curve ① represents a Smith chart showing a third frequency band supported by the antenna assembly 10 when the electronic device 1 used by the antenna assembly 10 is in the free space and adopts the control logic of the switch unit 112a in the free space (that is, the common end 1120 of the switch unit 112a is electrically connected to the fourth end 1124) and is the B8 frequency band. It can be seen from curve ① that the electronic device 1 used by the antenna assembly 10 is in the free space and adopts the control logic of the switch unit 112a in the free space. Fig. 9 When the control logic of the switch unit 112a is shown, the performance of the third frequency band supported by the antenna assembly 10 is the B8 frequency band. Curve ② is a Smith chart when the electronic device 1 used by the antenna assembly 10 is in the head-hand-left (BHHL) state, and the control logic of the switch unit 112a in free space is adopted (that is, the common terminal 1120 of the switch unit 112a is electrically connected to the fourth terminal 1124). It can be seen that the performance is not good. Curve ③ is when the electronic device 1 is in the head-hand-left (BHHL) state, and the control logic of the electronic device 1 in the left head-hand state is adopted (that is, the common terminal 1120 is electrically connected to the fourth terminal 1124, and the common terminal 1120 is electrically connected to the first terminal 1121). The performance of the third frequency band supported by the antenna assembly 10 is the B8 frequency band. In other words, when the electronic device 1 used by the antenna assembly 10 is in the left head and hand state, the original control logic of the switch unit 112a (i.e., the control logic of free space, i.e., the common end 1120 is only electrically connected to the fourth end 1124), the first antenna 110 is closer to the capacitance, so at this time, it is necessary to control the common end 1120 to be electrically connected to the first end 1121 based on the original control logic, and adjust the capacitance of the feed path between the first feed source S1 and the first radiator 111, so that the impedance value between the first feed source S1 and the first radiator 111 is closer to the impedance value of 50 ohms from the first feed source S1 to the RF end. When the impedance value between the first feed source S1 and the first radiator 111 is closer to the impedance value of 50 ohms from the first feed source S1 to the RF end, the impedance value from the first feed source S1 to the first radiator 111 is more matched with the impedance value from the first feed source S1 to the RF end, thereby improving the efficiency of the RF output from the RF end.

[0133] See also Fig.18 , Fig.18The Smith chart is a diagram showing a situation in which the third frequency band supported by the electronic device used by the antenna assembly is in the right head and hand state and is the B8 frequency band. In the schematic diagram, curve ① represents a Smith chart showing a situation in which the third frequency band supported by the antenna assembly 10 is the B8 frequency band when the electronic device 1 used by the antenna assembly 10 is in the free space and adopts the control logic of the switch unit 112a in the free space (that is, the common terminal 1120 of the switch unit 112a is electrically connected to the fourth terminal 1124). It can be seen from curve ① that the electronic device 1 used by the antenna assembly 10 is in the free space and adopts the control logic of the switch unit 112a in the free space. Fig. 9 When the control logic of the switch unit 112a is shown, the performance of the third frequency band supported by the antenna assembly 10 is the B8 frequency band. Curve ② is a Smith chart when the electronic device 1 used by the antenna assembly 10 is in the right head and hand (BHHR) state, and the control logic of the switch unit 112a in free space (that is, the common terminal 1120 of the switch unit 112a is electrically connected to the fourth terminal 1124) is adopted. It can be seen that the performance is not good. Curve ③ is when the electronic device 1 is in the right head and hand (BHHR) state, and the control logic of the electronic device 1 in the right head and hand state (that is, the common terminal 1120 is electrically connected to the fourth terminal 1124, and the common terminal 1120 is electrically connected to the first terminal 1121), the performance of the third frequency band supported by the antenna assembly 10 is the B8 frequency band. In other words, when the electronic device 1 used by the antenna assembly 10 is in the right-hand state, the original control logic of the switch unit 112a (i.e., the control logic of free space, i.e., the common end 1120 is only electrically connected to the fourth end 1124), the first antenna 110 is closer to the capacitance, so at this time, it is necessary to control the common end 1120 to be electrically connected to the first end 1121 based on the original control logic, and adjust the capacitance of the feed path between the first feed source S1 and the first radiator 111, so that the impedance value between the first feed source S1 and the first radiator 111 is closer to the impedance value of 50 ohms (Ω) from the first feed source S1 to the RF end, which is represented by 50ohm in the figure. When the impedance value between the first feed source S1 and the first radiator 111 is closer to the impedance value of 50 ohms from the first feed source S1 to the RF end, the impedance value from the first feed source S1 to the first radiator 111 is more matched with the impedance value from the first feed source S1 to the RF end, thereby improving the efficiency of the RF output from the RF end.

[0134] See also Fig.19 , Fig.19The Smith chart is a diagram showing a Smith chart when the third frequency band supported by the electronic device to which the antenna assembly is applied is the B8 frequency band when the electronic device is in a horizontal screen hand-held state. In the schematic diagram, curve ① represents a Smith chart when the third frequency band supported by the antenna assembly 10 is the B8 frequency band when the electronic device 1 to which the antenna assembly 10 is applied is in a free space and adopts the control logic of the switch unit 112a in free space (that is, the common end 1120 of the switch unit 112a is electrically connected to the fourth end 1124). It can be seen from curve ① that the electronic device 1 to which the antenna assembly 10 is applied is in a free space and adopts the control logic of the switch unit 112a in free space. Fig. 9 When the control logic of the switch unit 112a is used, the performance of the third frequency band supported by the antenna assembly 10 is better when the B8 frequency band is the B8 frequency band. Curve ② is a Smith chart when the electronic device 1 used by the antenna assembly 10 is in a horizontal hand-held state and the control logic of the switch unit 112a in free space is adopted (that is, the common end 1120 of the switch unit 112a is electrically connected to the fourth end 1124). It can be seen that the performance is not good. Curve ③ is a Smith chart when the electronic device 1 is in a horizontal hand-held state and the control logic of the electronic device 1 in the horizontal hand-held state is adopted (that is, the common end 1120 is electrically connected to the first end 1121). The performance of the third frequency band supported by the antenna assembly 10 is better when the B8 frequency band is the B8 frequency band, and it is even better than the control logic under free space. In other words, when the antenna assembly 10 of the embodiment of the present application is in a horizontal hand-held mode, using Fig. 9 The control logic of the switch unit 112a in the horizontal screen holding state (ie, the common terminal 1120 is electrically connected to the first terminal 1121) is Fig. 9 The performance under the control logic of the switch unit 112a in free space (i.e., the common end 1120 is electrically connected to the fourth end 1124) is better. In other words, when the electronic device 1 to which the antenna assembly 10 is applied is in a horizontal screen hand-held state, the original control logic of the switch unit 112a (i.e., the control logic of free space, that is, the common end 1120 is only electrically connected to the fourth end 1124), the first antenna 110 is closer to capacitance, and at this time, the common end 1120 is controlled to be electrically connected to the first end 1121, and the capacitance of the feed path between the first feed source S1 and the first radiator 111 is adjusted, so that the impedance value between the first feed source S1 and the first radiator 111 is closer to the impedance value of 50 ohms (Ω) from the first feed source S1 to the RF end, which is closer to 50 ohms than the control logic of the switch unit 112a in free space (i.e., the common end 1120 is electrically connected to the fourth end 1124). When the impedance value between the first feed source S1 and the first radiator 111 is closer to the impedance value of 50 ohms from the first feed source S1 to the RF end, the impedance value from the first feed source S1 to the first radiator 111 is more matched with the impedance value from the first feed source S1 to the RF end, thereby improving the efficiency of the RF output from the RF end.

[0135] It can be seen from the above Smith simulation diagram that the antenna assembly 10 provided in the embodiment of the present application is Fig. 9 The topological structure and control logic of the switch unit 112a of the tuning circuit 112 shown in the figure make the switch unit 112a have a path at the first end 1121, and the matching devices such as the first capacitor C1, the second capacitor C2, the third capacitor C3, the first inductor L1 and the second inductor L2 are not completely parallel matching devices, but also include matching devices in series, which can adjust the capacitance of the entire first antenna 110, and can also reduce mismatch in the head-hand state or horizontal screen hand-holding scenario, so as to achieve radiation efficiency similar to that of free space radiation, and reduce the large efficiency drop caused by the human head, or human hand, or human head and hand. In other words, the efficiency drop caused by the human head, or human hand, or human head and hand of the antenna assembly 10 provided in the embodiment of the present application is small, or even no drop.

[0136] It should be noted that, in one embodiment, the first antenna 110 in the antenna assembly 10 provided in the embodiment of the present application is usually arranged at the bottom of the electronic device 1, so the first antenna 110 is also called the lower antenna. In addition to supporting the first target frequency band, the first antenna 110 of the antenna assembly 10 also supports the second target frequency band; when the first target frequency band is a low frequency band and the second target frequency band is a Bluetooth frequency band or a WiFi frequency band (such as WiFi 2.4G), the first antenna 110 is an antenna whose lower antenna low frequency band is compatible with the Bluetooth frequency band or the WiFi frequency band.

[0137] In addition, in one embodiment, when the antenna assembly 10 further includes a third antenna 130 supporting the second target frequency band and a fourth antenna 140 supporting the second target frequency band, when the electronic device 1 to which the antenna assembly 10 is applied is placed with the top facing downward into the pocket of the user's clothes, the third antenna 130 and the fourth antenna 140 will be blocked, and the performance of at least one of the third antenna 130 and the fourth antenna 140 when supporting the second target frequency band will be reduced. In this case, the controller 180 controls the first antenna 110 and the other of the third antenna 130 and the fourth antenna 140 to jointly support the dual channel of the second target frequency band, so that the electronic device 1 still has good communication effect and antenna performance in the second target frequency band. This control method can be applied to the scenario when the headset communicates with the electronic device 1 placed in the user's clothes pocket using the second target frequency band, and can improve the communication effect when the headset communicates with the electronic device 1 placed in the user's clothes pocket using the second target frequency band, thereby improving the user experience.

[0138] In addition, it should be noted that the specific implementation of the switch unit 112a of the tuning circuit 112 in the first antenna 110 given in the embodiment of the present application is only one implementation of the first antenna 110 provided in the embodiment of the present application, and should not be understood as a limitation on the antenna assembly 10 provided in the embodiment of the present application. The antenna assembly 10 provided in the embodiment of the present application does not limit the number of switch units 112a in the tuning circuit 112, and the tuning devices such as capacitors and inductors in the tuning circuit 112 can share switches or be controlled by separate switches, and there are also various connection methods.

[0139] It can be understood that the positions of the first antenna 110 and the second antenna 120 in the implementation diagram of the present application are merely for illustration. In other implementations, the first antenna 110 and the second antenna 120 may also be arranged in a mirror image. When the first target frequency band supported by the first antenna 110 is a low frequency band, the first antenna 110 is a low frequency antenna; when the third target frequency band supported by the second antenna 120 is a medium and high frequency band, the second antenna 120 is a medium and high frequency antenna, and the low frequency antenna and the medium and high frequency antenna may also be arranged in a mirror image.

[0140] In addition, in one embodiment, the antenna assembly 10 includes three antennas supporting the second target frequency band (respectively, the first antenna 110, the third antenna 130, and the fourth antenna 140), but this should not be understood as a limitation on the antenna assembly 10 provided in the implementation of the present application. In other embodiments, the antenna assembly 10 may also include four or more antennas supporting the second target frequency band.

[0141] In addition, in one embodiment, the first antenna 110 of the antenna assembly 10 may include the excitation inductor L0. In another embodiment, the first antenna 110 of the antenna assembly 10 may also not include the excitation inductor L0.

[0142] In one embodiment, the second antenna 120 may include the matching circuit M. In another embodiment, the second antenna 120 may not include the matching circuit M.

[0143] See also Fig. 20 , Fig. 20 This is a schematic diagram of an electronic device provided in another embodiment of the present application. The electronic color plate 1 includes an antenna assembly 10 provided in any of the above embodiments. Please refer to the above description of the antenna assembly 10, which will not be described again here.

[0144] In addition, in one embodiment, the electronic device 1 further includes a display screen 30, and the display screen 30 is arranged opposite to the battery cover 70 to form a receiving space, and the receiving space is used to receive circuit boards, functional components, etc.

[0145] In one embodiment, the electronic device 1 further includes a middle frame 50, and the middle frame 50 is located between the display screen 30 and the battery cover 70. The first radiator 111 is a frame antenna formed in the frame portion of the middle frame 50. When the antenna assembly 10 includes a second antenna 120, the second radiator 121 and the third radiator 122 may also be frame antennas formed in the frame portion of the middle frame 50. In addition, the electronic device 1 further includes a circuit board 60, and the circuit board 60 is disposed in the receiving space. When the first antenna 110 of the antenna assembly 10 includes a first feed source S1, the first feed source S1 may be disposed on the circuit board 60. When the second antenna 120 of the antenna assembly 10 includes a second feed source S2, the second feed source S2 is disposed on the circuit board 60.

[0146] In addition, the electronic device 1 also includes a battery, functional devices (the functional devices may include one or more of a camera module, a microphone, a receiver, a speaker, a face recognition module, and a fingerprint recognition module) and other devices that can realize the basic functions of the mobile phone, which will not be described in detail in this embodiment. It can be understood that the above introduction to the electronic device 1 is only an explanation of an environment in which the antenna assembly 10 is applied, and the specific structure of the electronic device 1 should not be understood as a limitation on the antenna assembly 10 provided in this application.

[0147] The above are some implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. An electronic device, characterized in that: The electronic device includes an antenna assembly, the antenna assembly includes a first antenna, and the first antenna includes: a first radiator, the first radiator comprising a first free end and a second free end, and a first feeding point and a first grounding point located between the first free end and the second free end, the first feeding point being disposed closer to the first free end than the first grounding point, and the first grounding point being grounded; and A first feed source, the first feed source is electrically connected to the first feeding point to excite the first radiator to generate a first resonant mode and a second resonant mode that support a first target frequency band, wherein the first resonant mode is used to support the first target frequency band and has a first resonant frequency point, and the second resonant mode is used to support the first target frequency band and has a second resonant frequency point, and the second resonant frequency point is greater than the first resonant frequency point.

2. The electronic device according to claim 1, wherein: The first resonant mode is a quarter-wavelength mode of convection from the first ground point to the first free end and from the first ground point to the second free end; the second resonant mode is a half-wavelength mode from the first free end to the second free end.

3. The electronic device according to claim 1, wherein: The first antenna further includes a tuning circuit electrically connected to the first feeding point, and the tuning circuit is used to adjust the first target frequency band.

4. The electronic device according to claim 3, characterized in that: The tuning circuit comprises: a switch unit, the switch unit having a common terminal, a first terminal, a second terminal, a third terminal and a fourth terminal, the common terminal being electrically connected to the first feeding point; a first capacitor, one end of the first capacitor being electrically connected to the first feed source, and the other end of the first capacitor being electrically connected to the first feed point; a second capacitor, one end of the second capacitor being electrically connected to the first feed source, and the other end of the second capacitor being electrically connected to the first end; A third capacitor, one end of the third capacitor is electrically connected to the third end, and the other end of the third capacitor is grounded; a first inductor, one end of the first inductor being electrically connected to the first feeding point, and the other end of the first inductor being electrically connected to the fourth end; and a second inductor, one end of the second inductor being electrically connected to the fourth end, and the other end of the second inductor being grounded; The common end may be electrically connected to at least one of the first end, the second end, and the fourth end, and the common end may be electrically disconnected from the first end, the second end, the third end, and the fourth end to adjust the first target frequency band.

5. The electronic device according to claim 4, characterized in that: When the electronic device is in free space or in the left hand or the right hand, and when the common end is electrically connected to the second end, and the common end is electrically disconnected from the first end, the third end and the fourth end respectively, the first antenna supports the first frequency band in the first target frequency band.

6. The electronic device according to claim 4, characterized in that: When the electronic device is in a horizontal screen state, when the common end is electrically connected to the first end, and when the common end is electrically connected to the second end, the first antenna supports a first frequency band in the first target frequency band.

7. The electronic device according to claim 4, characterized in that: When the electronic device is in free space or in the left hand or the right hand, and when the common end is electrically disconnected from the first end, the second end, the third end and the fourth end, the first antenna supports the second frequency band of the first target frequency band.

8. The electronic device according to claim 4, characterized in that: When the electronic device is in a horizontal state, and when the common end is electrically connected to the first end and the common end is electrically disconnected from the second end, the third end and the fourth end respectively, the first antenna supports the second frequency band of the first target frequency band.

9. The electronic device according to claim 4, characterized in that: When the electronic device is in free space, when the common end is electrically connected to the fourth end, and the common end is electrically disconnected from the first end, the second end, and the third end respectively, the first antenna supports a third frequency band of the first target frequency band.

10. The electronic device according to claim 4, characterized in that: When the electronic device is in the left hand or the right hand, and when the common end is electrically connected to the first end and the fourth end respectively, and the common end is electrically disconnected from the second end and the third end respectively, the first antenna supports the third frequency band of the first target frequency band.

11. The electronic device according to claim 4, characterized in that: When the electronic device is in a horizontal screen state, and when the common end is electrically connected to the first end and the common end is electrically disconnected from the second end, the third end and the fourth end respectively, the first antenna supports the third frequency band of the first target frequency band.

12. The electronic device according to claim 1, wherein: The first radiator further has a connection point, and the connection point is closer to the second free end than the first ground point; The first antenna further includes an excitation inductor, one end of which is electrically connected to the connection point, and the other end of which is grounded.

13. The electronic device according to claim 12, characterized in that: The excitation inductor is a conductive lead or an inductor.

14. The electronic device according to claim 13, characterized in that: The first target frequency band is a low frequency band, and the inductance value L0 of the excitation inductor satisfies: 2nH≤L0≤10nH.

15. The electronic device according to any one of claims 1 to 14, characterized in that: The first feed source also excites the first radiator to generate a third resonance mode supporting a second target frequency band.

16. The electronic device according to claim 15, characterized in that: The third resonance mode is a quarter-wavelength mode from the first feeding point to the first free end.

17. The electronic device according to any one of claims 1 to 14, characterized in that: The antenna assembly further includes a second antenna, the second antenna comprising: A second radiator, the second radiator having a third free end, a first ground end, and a second feeding point located between the third free end and the first ground end, the first ground end being grounded; a third radiator, the third radiator having a fourth free end and a second ground end, the fourth free end and the third free end are spaced apart to form a first gap, the third radiator is coupled to the second radiator through the first gap, the second ground end and the first free end of the first radiator are spaced apart to form a second gap, and the second ground end is grounded; and A second feed source is electrically connected to the second feed point to excite the second radiator and the third radiator to jointly support a third target frequency band.

18. The electronic device according to claim 15, characterized in that: The antenna assembly further comprises: a third antenna and a fourth antenna, wherein the third antenna and the fourth antenna are both spaced apart from the first antenna, and both support a second target frequency band; The electronic device further comprises: A controller, when the signal strength of one of the third antenna and the fourth antenna when supporting the second target frequency band is less than or equal to a preset strength, the controller turns off the one of the third antenna and the fourth antenna, and controls the first antenna to support the second target frequency band, wherein the signal strength of the first antenna component when supporting the second target frequency band is greater than the preset strength, so as to jointly support the dual channel of the second target frequency band with the other of the third antenna and the fourth antenna.

19. The electronic device according to claim 15, characterized in that: in, The first target frequency band is a low frequency band, and the second target frequency band is a Bluetooth frequency band or a WiFi frequency band.

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