Electronic device

Abstract

The application provides an electronic device; the electronic device comprises a floor and an antenna assembly, the floor comprises a top edge, a first side edge, a bottom edge and a second side edge which are connected in sequence and are bent; the antenna assembly comprises a first feed source for providing a first excitation signal and a first radiator; the first radiator is arranged adjacent to the first side edge and has a first grounding end, a first feeding point and a first free end; the first grounding end is electrically connected to the floor; the first free end is arranged adjacent to the top edge compared with the first grounding end; the first radiator is electrically connected to the first feed source through the first feeding point and supports a first target frequency band under the excitation of the first excitation signal; the first free end has a first end face away from the bottom edge and a second end face away from the second side edge; the distance d 11 ≥89mm between the first end face and the bottom edge, the distance d 11 ’≥60mm between the first end face and the top edge; and an electric field perpendicular to the second end face is generated when the first radiator supports the first target frequency band.

Description

TECHNICAL FIELD

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

[0002] Electronic devices such as mobile phones have communication functions due to the inclusion of an antenna assembly, and thus are widely used. Electronic devices such as mobile phones are usually held by a user's hand when in use. However, in the related art, when an electronic device is held by a user's hand, the performance of the antenna assembly in the electronic device is degraded. SUMMARY

[0003] In a first aspect, the present application provides an electronic device, the electronic device comprising a floor and an antenna assembly, the floor comprising a top edge, a first side edge, a bottom edge and a second side edge connected in sequence by bending, the top edge and the bottom edge being located on the same side of the first side edge, the second side edge being connected to the top edge and the bottom edge by bending respectively, and the second side edge being located opposite to and spaced apart from the first side edge; the antenna assembly comprising:

[0004] a first feed source providing a first excitation signal; and

[0005] a first radiator located adjacent to the first side edge, the first radiator having a first ground end, a first feed point and a first free end, the first ground end being electrically connected to the floor, the first free end being located adjacent to the top edge compared to the first ground end, the first radiator being electrically connected to the first feed source through the first feed point and supporting a first target frequency band under the excitation of the first excitation signal;

[0006] wherein the first free end has a first end face facing away from the bottom edge and a second end face facing away from the second side edge, the distance d 11 from the first end face to the bottom edge satisfies: d 11 ≥ 89mm, the distance d 11 ’ from the first end face to the top edge satisfies: d 11 ’ ≥ 60mm; and when the first radiator supports the first target frequency band, the first radiator generates an electric field perpendicular to the second end face.

[0007] In summary, the electronic device provided by the embodiment of the present application has the following advantages: the distance d 11 from the first end face to the bottom edge satisfies: d 11 ≥ 89mm, the distance d 11 ’ from the first end face to the top edge satisfies: d 11≥ 60mm, so that the electronic device is in a vertical state, and a user's finger can contact the first radiator. An electric field is generated on the first radiator that is perpendicular to the second end face, so that, due to the high dielectric constant of a human body, when a user's finger contacts the first radiator, the human body is excited by the electric field generated by the first radiator that is perpendicular to the second end face to exhibit a radiation characteristic, so that the system radiation efficiency of the electronic device is higher when the electronic device is in a vertical state and is held by a user's hand. In addition, the distance d 11 satisfies: d 11 ≥ 89mm, the distance d 11 of the first end face to the top edge satisfies: d 11 ≥ 60mm, so that the electronic device is in a horizontal state, the first radiator is not touched by a user's finger and is less shielded, so that the first radiator also has good antenna performance when the electronic device is in a horizontal state. BRIEF DESCRIPTION OF DRAWINGS

[0008] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0009] Figure 1 a perspective view of an electronic device provided by an embodiment of the present application;

[0010] Figure 2 a schematic view of an antenna assembly in an electronic device shown in an embodiment of the present application; Figure 1

[0011] a partial size schematic view of the antenna assembly in Figure 3 Figure 2 a schematic view of an electric field at I in

[0012] Figure 4 Figure 2 a schematic view of an electric field at I in

[0013] Figure 5 a schematic view of a left hand holding an electronic device when the electronic device is in a vertical state;

[0014] Figure 6 a schematic view of a right hand holding an electronic device when the electronic device is in a vertical state;

[0015] Figure 7 a schematic view of both hands of a user holding an electronic device when the electronic device is in a horizontal state;

[0016] ​​Figure 8 Fig. 2 is a schematic view of a user holding an electronic device in another landscape state;

[0017] Figure 9 Fig. 3 is a schematic view of an antenna assembly in the electronic device of Fig. 1 ; Figure 2 Fig. 4 is a schematic view of a current distribution in a first radiator of the antenna assembly of Fig. 3;

[0018] Figure 10 Fig. 5 is a schematic view of an antenna assembly in another embodiment of the electronic device of Fig. 1 ; Figure 1 Fig. 6 is a schematic view of a current distribution in a first radiator of the antenna assembly of Fig. 5;

[0019] Figure 11 Fig. 7 is a schematic view of an antenna assembly in another embodiment of the electronic device of Fig. 1 ; Figure 10 Fig. 8 is a schematic view of a current distribution in a first radiator of the antenna assembly of Fig. 7;

[0020] Figure 12 Fig. 9 is a schematic view of an antenna assembly in another embodiment of the electronic device of Fig. 1 ; Figure 1 Fig. 10 is a schematic view of a current distribution in a first radiator of the antenna assembly of Fig. 9;

[0021] Figure 13 Fig. 11 is a schematic view of an antenna assembly in another embodiment of the electronic device of Fig. 1 ; Figure 12 Fig. 12 is a schematic view of a current distribution in a first radiator of the antenna assembly of Fig. 11;

[0022] Figure 14 Fig. 13 is a schematic view of a dimension of a first feed point of the antenna assembly of Fig. 1 to a bottom edge; Figure 12

[0023] Fig. 14 is a schematic view of an antenna assembly according to another embodiment of the application; Figure 15

[0024] Fig. 15 is a schematic view of an antenna assembly according to another embodiment of the application; Figure 16

[0025] Fig. 16 is a schematic view of an antenna assembly according to another embodiment of the application; Figure 17 Figure 16 Fig. 17 is a circuit diagram of the antenna assembly of Fig. 1 ;

[0026] Figure 18 Fig. 18 is a schematic view of an antenna assembly according to another embodiment of the application;

[0027] Figure 19 Fig. 19 is a schematic view of a dimension of the antenna assembly of Fig. 1 ; Figure 18 Fig. 20 is a schematic view of a dimension of the antenna assembly of Fig. 1 ;

[0028] Figure 20 Fig. 21 is a schematic view of a dimension of the antenna assembly of Fig. 1 ; Figure 18 Fig. 22 is a schematic view of a dimension of the antenna assembly of Fig. 1 ;

[0029] Figure 21 Fig. 23 is a schematic view of a current distribution in a third radiator of the antenna assembly of Fig. 1 ; Figure 20 Fig. 24 is a schematic view of a current distribution in a third radiator of the antenna assembly of Fig. 1 ;

[0030] Figure 22 ​Schematic diagram of the third radiator shown in another embodiment;

[0031] Figure 23 Schematic diagram of the third radiator shown in another embodiment; Figure 22 Schematic diagram of the current distribution of the third radiator;

[0032] Figure 24 Schematic diagram of the third radiator shown in another embodiment; Figure 22 Schematic diagram of the distance of the third radiator in the embodiment from other components;

[0033] Figure 25 Schematic diagram of the third radiator shown in another embodiment;

[0034] Figure 26 Schematic diagram of the current distribution of the third radiator;

[0035] Figure 27 Schematic diagram of the third feed point of the antenna assembly shown in another embodiment; Figure 25 Schematic diagram of the size of the bottom edge of the third feed point of the antenna assembly shown in another embodiment;

[0036] Figure 28 Schematic diagram of the antenna assembly shown in another embodiment;

[0037] Figure 29 Schematic diagram of the antenna assembly shown in another embodiment; Figure 28 Circuit block diagram of the antenna assembly shown in another embodiment;

[0038] Figure 30 Schematic diagram of the antenna assembly shown in another embodiment;

[0039] Figure 31 Circuit block diagram of the antenna assembly shown in another embodiment; Figure 30 Circuit block diagram of the antenna assembly shown in another embodiment;

[0040] Figure 32 Schematic diagram of the S parameters of the antenna assembly provided in an embodiment of the present application in various cases;

[0041] Figure 33 Schematic diagram of the system radiation efficiency and the system total efficiency of the antenna assembly provided in an embodiment of the present application in various cases.

[0042] Explanation of main element reference numerals:

[0043] Electronic device 1, floor 10, top edge 110, first side edge 120, bottom edge 130, second side edge 140;

[0044] Antenna assembly 30, first feed source S1, first matching circuit M1, first radiator 310, first ground terminal 311, first feed point P1, first free end 312, first end face 310a, second end face 310b;

[0045] The second radiator 320, the second feed point P2, the first radio frequency front-end circuit 350, the first switch 351, the first filter circuit 352, the first power amplifier circuit 353;

[0046] The controller 360, the second feed source S2;

[0047] The third radiator 330, the second ground terminal 331, the third feed point P3, the second free end 332, the third end face 330a, the fourth end face 330b;

[0048] The fourth radiator 340, the fourth feed point P4, the second radio frequency front-end circuit 370, the second switch 371, the second filter circuit 372, the second power amplifier circuit 373;

[0049] The radio frequency front-end circuit 380, the switch 381, the filter circuit 382, the power amplifier circuit 383;

[0050] The middle frame 50, the frame body 510, the first frame 520, the second frame 530, the first gap 521, the second gap 522, the third gap 531, the fourth gap 532;

[0051] The shell 90, the display screen 70. DETAILED DESCRIPTION

[0052] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the embodiments described in the present application are only part of the embodiments, rather than all the embodiments. Based on the embodiments provided in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0053] In the present application, the phrase "embodiment" means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment to other embodiments. Those skilled in the art can explicitly and implicitly understand that the embodiments described in the present application can be combined with other embodiments.

[0054] The terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish different objects, and are not used to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example: an assembly or device including one or more components is not limited to the listed one or more components, but can optionally include one or more components not listed but inherent to the product exemplified, or one or more components that should be included based on the described function.

[0055] Please also refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , Figure 1 A schematic three-dimensional diagram of an electronic device provided in one embodiment of the present application; Figure 2 for Figure 1 A schematic diagram of an antenna assembly in an electronic device shown in one embodiment; Figure 3 for Figure 2 A schematic diagram of some dimensions of the antenna assembly;

[0056] Figure 4 for Figure 2 Schematic diagram of the electric field at point I in the figure. The electronic device 1 can be a mobile phone, tablet computer, or other device with communication capabilities. In this embodiment, the electronic device 1 is a mobile phone as an example. The electronic device 1 includes a base 10 and an antenna assembly 30. The base 10 includes a top edge 110, a first side edge 120, a bottom edge 130, and a second side edge 140, which are connected in a bent manner. The top edge 110 and the bottom edge 130 are both located on the same side of the first side edge 120. The second side edge 140 is bent and connected to the top edge 110 and the bottom edge 130, respectively. The second side edge 140 is spaced apart from and opposite to the first side edge 120. The antenna assembly 30 includes a first feed source S1 and a first radiator 310. The first feed source S1 is used to provide a first excitation signal. The first radiator 310 is disposed adjacent to the first side edge 120. The first radiator 310 has a first ground terminal 311, a first feed point P1, and a first free end 312. The first ground terminal 311 is electrically connected to the base 10. The first free end 312 is disposed adjacent to the top edge 110 relative to the first ground end 311. The first radiator 310 is electrically connected to the first feed source S1 via the first feeding point P1 and supports the first target frequency band under the excitation of the first excitation signal. The first free end 312 has a first end surface 310a facing away from the bottom edge 130 and a second end surface 310b facing away from the second side edge 140. A distance d from the first end surface 310a to the bottom edge 130 is 11 Satisfaction: d 11 ≥89mm, the distance d from the first end surface 310a to the top edge 110 11 'Satisfied:d 11 When the first radiator 310 supports the first target frequency band, the first radiator 310 generates an electric field perpendicular to the second end face 310b (see electric field). Figure 4 , marked with arrows).

[0057] The ground plate 10 can be at least part of a middle frame 50 of the electronic device 1, or be a ground pole in a circuit board of the electronic device 1, or be a shielding member of a display screen of the electronic device 1. In the embodiment, the ground plate 10 is taken as an example of being part of the middle frame 50 of the electronic device 1 for illustration and description.

[0058] The ground plate 10 is rectangular or substantially rectangular. In the schematic view of the embodiment, the ground plate 10 is taken as an example of being rectangular for illustration. The top edge 110 and the bottom edge 130 of the ground plate 10 are two short edges of the ground plate 10. The first side edge 120 and the second side edge 140 of the ground plate 10 are two long edges of the ground plate 10.

[0059] In the embodiment, when the electronic device 1 is in a vertical state, the top edge 110 is generally located at the top of the electronic device 1, and thus, the edge located at the top of the ground plate 10 when the electronic device 1 is in the vertical state is referred to as the top edge 110. Correspondingly, when the electronic device 1 is in the vertical state, the bottom edge 130 is generally located at the bottom of the electronic device 1, and thus, the edge located at the bottom of the ground plate 10 when the electronic device 1 is in the vertical state is referred to as the bottom edge 130. It can be understood that, with different placement postures of the electronic device 1, the top edge 110 can also be located at the bottom of the electronic device 1, and correspondingly, the bottom edge 130 can also be located at the top of the electronic device 1.

[0060] In the schematic view of the embodiment, the first side edge 120 is taken as an example of being located at the right side and the second side edge 140 is taken as an example of being located at the left side for illustration. It can be understood that, with different placement postures of the electronic device 1, the first side edge 120 can also be located at the left side of the electronic device 1 and the second side edge 140 can also be located at the right side of the electronic device 1. It can be understood that, with different placement postures of the electronic device 1, for example, when the electronic device 1 is in a first transverse state (also referred to as a transverse placement posture, see Figure 7 ), the top edge 110 can also be located at the left side of the electronic device 1 and the bottom edge 130 can also be located at the right side of the electronic device 1, and correspondingly, the first side edge 120 can also be located at the bottom of the electronic device 1 and the second side edge 140 can also be located at the top of the electronic device 1. Alternatively, when the electronic device 1 is in a second transverse state (also referred to as a transverse placement posture, see Figure 8 ), the top edge 110 is located at the right side of the electronic device 1, the bottom edge 130 is located at the left side of the electronic device 1, the first side edge 120 is located at the top of the electronic device 1, and the second side edge 140 is located at the bottom of the electronic device 1.

[0061] The first radiator 310 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 stub radiator. When the antenna assembly 30 is applied to the electronic device 1, the first radiator 310 can be a Mechanical Design Antenna (MDA) radiator designed by using the insert metal of the electronic device 1 itself. For example, the first radiator 310 can be an antenna radiator designed by using the middle frame 50 formed by the plastic and metal of the electronic device 1. In addition, the first radiator 310 can also be a metal edge frame antenna radiator designed by the metal middle frame 50.

[0062] It can be understood that the shape, structure and material of the first radiator 310 are not limited in the present application, and the shape of the first radiator 310 includes but is not limited to a bending shape, a straight shape, an L shape, a sheet shape, a rod shape, a coating, a film, etc. When the first radiator 310 is in a strip shape, the extension track of the first radiator 310 is not limited in the present application, so the first radiator 310 can extend in a straight line, a curve, or multiple bending segments. The first radiator 310 described above can be a line with uniform width in the extension track, or can be an irregular shape with different widths, such as a gradually changing width or a widened area.

[0063] The first ground terminal 311 is electrically connected to the ground pole of the electronic device 1 to ground the first ground terminal 311. The grounding of the first ground terminal 311 includes but is not limited to the following embodiments. The electrical connection of the first ground terminal 311 to the ground pole can include but is not limited to direct electrical connection (such as welding) or indirect electrical connection to the ground pole of the electronic device 1 through a coaxial line, a microstrip line, a conductive spring, conductive glue, etc. In an embodiment, when the first radiator 310 can also be a metal edge frame antenna radiator designed by the metal middle frame 50, the first ground terminal 311 and the frame body 510 of the middle frame 50 are in an integrated structure. The first feeding point P1 is used to receive a first excitation signal. The first excitation signal can be generated by a first feed source S1. In the present embodiment, the first target frequency band is taken as a Middle High Band (MHB) as an example for description. It can be understood that in other embodiments, the first target frequency band can be an Ultra High Band (UHB) or the like.

[0064] The first feeding point P1 may be electrically connected to the first feed source S1 by, but is not limited to, a conductive member (such as a conductive spring, conductive glue, a coaxial line, a microstrip line) or the like.

[0065] The first excitation signal generated by the first feed source S1 is transmitted to the first radiator 310 via the first feeding point P1 , thereby exciting the first radiator 310 to support the first target frequency band.

[0066] The distance d from the first end surface 310a to the bottom edge 130 11 Satisfaction: d 11 ≥89mm. The distance d 11 It can be but is not limited to 89mm, 90mm, 91mm, 92mm, 93mm, 94mm, 95mm, etc.

[0067] The distance d from the first end surface 310a to the top edge 110 11 'Satisfied:d 11 '≥60mm. The distance d 11 'It can be but not limited to 60mm, or 61mm, or 62mm, or 63mm, or 64mm, or 65mm, etc.

[0068] The distance d 11 Satisfaction: d 11 ≥89mm and the distance d 11 'Satisfied:d 11≥ 60 mm, so that when the electronic device 1 is in a vertical state (also referred to as a portrait state), a user's finger can touch the first radiator 310. A human body, as an object with a high dielectric constant, has radiation performance and energy loss characteristics. When a user's finger contacts the first radiator 310, the radiation characteristics of the human body are more easily exhibited relative to the energy loss characteristics of the human body. In other words, because the human body has a high dielectric constant, when a user's finger contacts the first radiator 310, the human body exhibits radiation characteristics due to the electric field generated by the first radiator 310 that is perpendicular to the second end surface 310b, so that the system radiation efficiency of the electronic device 1 is higher when the electronic device 1 is in a vertical state and is held by a user. In this embodiment, the electronic device 1 also includes a middle frame 50, the middle frame 50 including a frame body 510 and a first side frame 520 that is bent and connected to the frame body 510, the floor 10 including the frame body 510, the first side frame 520 adjacent to the first side edge 120, and the first radiator 310 located in the first side frame 520, for example. The first radiator 310 and the frame body 510 have a gap therebetween, and the first radiator 310 has an electric field that is perpendicular to a surface of the first radiator 310 other than a surface of the first radiator 310 that faces the gap. The system radiation efficiency of the electronic device 1 when the electronic device 1 is in a vertical state and is held by a user's right hand and when the electronic device 1 is in a vertical state and is held by a user's left hand will be described in detail later in connection with simulation diagrams.

[0069] Specifically, refer to Figure 2 and Figure 5 and Figure 6 , Figure 5 FIG. 4 is a schematic diagram of a user's left hand holding an electronic device in a vertical state; Figure 6 FIG. 5 is a schematic diagram of a user's right hand holding an electronic device in a vertical state. As can be seen from Figure 5 when the electronic device 1 is in a vertical state and the user's left hand holds the electronic device 1, the first end surface 310a is located above the user's middle finger, and the user's middle finger contacts the first radiator 310. As can be seen from Figure 6It can be seen that when the electronic device 1 is in the vertical state and the right hand holds the electronic device 1, the first end surface 310a is located above the user's thumb, and the user's thumb contacts the first radiator 310. When the user's finger contacts the first radiator 310, the human body (including the finger) is excited to exhibit radiation characteristics by the electric field generated by the first radiator 310 perpendicular to the second end surface 310b, so that the system radiation efficiency of the electronic device 1 is higher when the electronic device 1 is in the vertical state and held by the user's hand. It can be understood that in the embodiment, the gap between the first free end 312 and the frame body 510 is named as the first gap 521. The first end surface 310a is one surface of the first gap 521 defined by the first free end 312. By Figure 5 It can be seen that when the electronic device 1 is in the vertical state and the right hand holds the electronic device 1, the first gap 521 is located above the user's thumb, and the user's thumb contacts the first radiator 310. Figure 6 It can be seen that when the electronic device 1 is in the vertical state and the right hand holds the electronic device 1, the first gap 521 is located above the user's thumb, and the user's thumb contacts the first radiator 310.

[0070] Please refer to Figure 7 and Figure 8 , Figure 7 is a schematic view of the user holding the electronic device with both hands when the electronic device is in a lateral state; Figure 8 is a schematic view of the user holding the electronic device with both hands when the electronic device is in another lateral state. In Figure 7 , the first side edge 120 is located at the bottom of the electronic device 1, and correspondingly, the first radiator 310 is located at the bottom of the electronic device 1; in Figure 8 , the first side edge 120 is located at the top of the electronic device 1, and correspondingly, the first radiator 310 is located at the top of the electronic device 1. The distance d 11 satisfies: d 11 ≥ 89mm and the distance d 11 ' satisfies: d 11 '≥ 60mm, which can ensure that the first end surface 310a is located between the user's right hand finger and the user's left hand finger. Specifically, from the holding posture of the user's hand when the electronic device 1 is in the lateral state (also referred to as the horizontal screen state), in Figure 7 and Figure 8In the embodiment, the first end surface 310a is located between the user's right pinky and left pinky, and the distance from the first gap 521 to the nearest pinky is less than λ1 / 8. Therefore, when the electronic device 1 is in landscape orientation, the first radiator 310 is less likely to be blocked by the user's left and right hands, thereby ensuring that the first radiator 310 has good antenna performance even when the antenna assembly 30 is in landscape orientation. In this embodiment, the gap between the first free end 312 and the frame body 510 is referred to as the first gap 521. The first end surface 310a is the surface of the first free end 312 that defines the first gap 521. When the electronic device 1 is in a horizontal state and the first side 120 is located at the bottom of the electronic device 1, the first gap 521 is located between the pinky finger of the user's right hand and the pinky finger of the left hand, and the distance from the first gap 521 to the nearest pinky finger is less than λ1 / 8. Therefore, when the electronic device 1 is in a horizontal state, the first radiator 310 is less likely to be blocked by the left and right hands of the user, thereby enabling the first radiator 310 to have better antenna performance even when the electronic device 1 is in a horizontal state.

[0071] In summary, the antenna assembly 30 of the electronic device 1 provided in the embodiment of the present application, the distance d from the first end surface 310a to the bottom edge 130 is 11 Satisfaction: d 11 ≥89mm, the distance d from the first end surface 310a to the top edge 110 11 'Satisfied:d 11 '≥60mm, so that the electronic device 1 is in a vertical state and the user's finger can touch the first radiator 310. The first radiator 310 generates an electric field perpendicular to the second end surface 310b. Therefore, since the human body has a high dielectric constant, when the user's finger touches the first radiator 310, the human body is stimulated by the electric field perpendicular to the second end surface 310b generated by the first radiator 310 and exhibits radiation characteristics, so that the system radiation efficiency of the electronic device 1 is high when it is in a vertical state and held by the user's hand. In addition, the distance d from the first end surface 310a to the bottom edge 130 is 11 Satisfaction: d 11 ≥89mm, the distance d from the first end surface 310a to the top edge 110 11 'Satisfied:d 11 '≥60mm, the first radiator 310 can be not touched by the user's fingers and is less blocked when the electronic device 1 is in the horizontal state, thereby making the first radiator 310 have better antenna performance when the electronic device 1 is in the horizontal state.

[0072] Please also refer toFigure 2 、 Figure 3 and Figure 9 , Figure 9 for Figure 2 Schematic diagram of current distribution of the first radiator in the antenna assembly shown in . Figure 2 In the figure, the dotted line corresponds to the position of the first radiator 310, which indicates the current distribution of the first radiator 310. It can be understood that for the convenience of identification, the dotted line is drawn outside the first radiator 310, and it should not be understood as a limitation on the current distribution of the first radiator 310 in the antenna assembly 30 provided in the embodiment of the present application. The current distribution involved in the subsequent embodiments is also similarly expressed, and will not be described in detail later. Take the first radiator 310 as an inverted F antenna (IFA) antenna radiator with an equivalent length (i.e., electrical length) equal to λ1 / 4 as an example. Among them, λ1 is the wavelength corresponding to the center frequency of the first target frequency band, and the distance d from the connection between the first grounding end 311 and the floor 10 to the bottom edge 130 is 12 Meet: 30mm≤d 12 ≤75mm.

[0073] In this embodiment, when the first radiator 310 is an IFA antenna radiator with an equivalent length equal to λ1 / 4, the resonant current generated by the first excitation signal exciting the first radiator 310 is distributed between the first free end 312 and the first ground end 311. In other words, the entire branch of the first radiator 310 supports the first target frequency band, and the first radiator 310 operates in a quarter-wavelength mode when supporting the first target frequency band.

[0074] The quarter-wavelength mode is also called the fundamental mode. When the entire branch of the first radiator 310 supports the first target frequency band and the first radiator 310 supports the first target frequency band and works in the quarter-wavelength mode, the first radiator 310 supports the first target frequency band with better radiation efficiency.

[0075] The distance d 12 It can be but is not limited to 30mm, or 35mm, or 40mm, or 45mm, or 50mm, or 55mm, or 60mm, or 65mm, or 70mm, or 75mm.

[0076] The distance d from the connection point between the first grounding end 311 and the floor 10 to the bottom edge 130 is 12 Meet: 30mm≤d 12≤75mm can make the first ground end 311 be below the middle finger when the electronic device 1 is in the vertical state and held by the left hand of the user. In other words, when the electronic device 1 is in the vertical state and held by the left hand of the user: the distance d from the first end face 310a to the bottom edge 130 11 satisfies: d 11 ≥89mm can make the first end face 310a be above the middle finger of the left hand; the distance d from the connection of the first ground end 311 and the floor 10 to the bottom edge 130 12 satisfies: 30mm≤d 12 ≤75mm, can make the first ground end 311 be below the middle finger; therefore, the middle finger of the left hand of the user contacts the first radiator 310, and then the human body (including the middle finger of the left hand) is excited to present the radiation characteristic by the electric field generated by the first radiator 310 which is perpendicular to the second end face 310b, so that the system radiation efficiency is higher when the electronic device 1 is in the vertical state and held by the left hand of the user.

[0077] In addition, the distance d from the connection of the first ground end 311 and the floor 10 to the bottom edge 130 12 satisfies: 30mm≤d 12 ≤75mm can make the first ground end 311 be below the thumb when the electronic device 1 is in the vertical state and held by the right hand of the user. In other words, when the electronic device 1 is in the vertical state and held by the right hand of the user: the distance d from the first end face 310a to the bottom edge 130 11 satisfies: d 11 ≥89mm can make the first end face 310a be above the middle finger of the right hand; the distance d from the connection of the first ground end 311 and the floor 10 to the bottom edge 130 12 satisfies: 30mm≤d 12 ≤75mm, can make the first ground end 311 be below the thumb; therefore, the thumb of the right hand of the user contacts the first radiator 310, and then the human body (including the thumb of the right hand) is excited to present the radiation characteristic by the electric field generated by the first radiator 310 which is perpendicular to the second end face 310b, so that the system radiation efficiency is higher when the electronic device 1 is in the vertical state and held by the right hand of the user.

[0078] Please refer to Figure 10 and Figure 11 , Figure 10 are Figure 1 schematic diagrams of an antenna assembly in an electronic device according to another embodiment; Figure 11 are Figure 10FIG. 2 shows a schematic diagram of current distribution of the first radiator in the antenna assembly shown in FIG. 1. In the embodiment, the first radiator 310 is an IFA antenna radiator with an equivalent length of 3λ1 / 4. Wherein, λ1is the wavelength corresponding to the center frequency of the first target frequency band, and the distance d between the connection of the first ground end 311 and the ground plate 10 and the bottom edge 130 12 satisfies: 30mm≤d 12 ≤75mm.

[0079] In the embodiment, when the first radiator 310 is an IFA antenna radiator with an equivalent length of 3λ1 / 4, the resonance current distribution generated by the first radiator 310 excited by the first excitation signal is distributed between the first free end 312 and the first ground end 311, in other words, the entire branch of the first radiator 310 supports the first target frequency band, and the first radiator 310 supports the first target frequency band in the three-quarter wavelength mode.

[0080] The three-quarter wavelength mode is also called high-order mode, when the entire branch of the first radiator 310 supports the first target frequency band, and the first radiator 310 supports the first target frequency band in the three-quarter wavelength mode, the wavelength mode of the first radiator 310 can be fully utilized to support the first target frequency band.

[0081] The distance d 12 may be, but is not limited to, 30mm, or 35mm, or 40mm, or 45mm, or 50mm, or 55mm, or 60mm, or 65mm, or 70mm, or 75mm.

[0082] The distance d 12 satisfies: 30mm≤d 12 ≤75mm can make the first ground end 311 be located below the middle finger when the electronic device 1 is in a vertical state and held by the left hand of the user. In other words, when the electronic device 1 is in a vertical state and held by the left hand of the user: the distance d 11 satisfies: d 11 ≥89mm can make the first end face 310a be located above the middle finger of the left hand; the distance d 12 satisfies: 30mm≤d 12≤75mm, so that the first ground end 311 is located below the middle finger; thus, the left middle finger of the user contacts the first radiator 310, and then the human body (including the left middle finger) is excited to present a radiation characteristic by the electric field generated by the first radiator 310 which is perpendicular to the second end surface 310b, so that the electronic device 1 is in a vertical state and the system radiation efficiency is higher when being held by the left hand of the user.

[0083] In addition, the distance d from the connection of the first ground end 311 with the ground plate 10 to the bottom edge 130 12 satisfies: 30mm≤d 12 ≤75mm, so that the first ground end 311 is located below the middle finger; thus, the left middle finger of the user contacts the first radiator 310, and then the human body (including the left middle finger) is excited to present a radiation characteristic by the electric field generated by the first radiator 310 which is perpendicular to the second end surface 310b, so that the electronic device 1 is in a vertical state and the system radiation efficiency is higher when being held by the left hand of the user. 11 satisfies: d 11 ≥89mm, so that the first end surface 310a is located above the middle finger of the right hand; the distance d from the connection of the first ground end 311 with the ground plate 10 to the bottom edge 130 12 satisfies: 30mm≤d 12 ≤75mm, so that the first ground end 311 is located below the thumb; thus, the thumb of the right hand of the user contacts the first radiator 310, and then the human body (including the thumb of the right hand) is excited to present a radiation characteristic by the electric field generated by the first radiator 310 which is perpendicular to the second end surface 310b, so that the electronic device 1 is in a vertical state and the system radiation efficiency is higher when being held by the right hand of the user.

[0084] Please refer to Figure 12 , Figure 13 and Figure 14 , Figure 12 as the schematic diagram of the antenna assembly in the electronic device shown in another embodiment of Figure 1 ; Figure 13 as the schematic diagram of the current distribution of the first radiator in the antenna assembly shown in Figure 12 ; Figure 14 as the schematic diagram of the distance from the first feeding point of the antenna assembly in Figure 12 to the bottom edge. The first radiator 310 is a monopole antenna radiator with an equivalent length of λ1 / 4 from the first free end 312 to the first feeding point P1, and the distance d from the first feeding point P1 to the bottom edge 130 13 satisfies: 30mm≤d 13 ≤75mm.

[0085] In the embodiment, when the first radiator 310 is a monopole antenna radiator with an equivalent length of λ1 / 4, the first excitation signal excites the first radiator 310 to generate a resonant current mainly distributed between the first free end 312 and the first feed point P1. In other words, the part of the branch between the first free end 312 and the first feed point P1 of the first radiator 310 supports the first target frequency band, and the first radiator 310 supports the first target frequency band in a quarter wavelength mode.

[0086] The quarter wavelength mode is also called the fundamental mode. When the part of the branch between the first free end 312 and the first feed point P1 of the first radiator 310 supports the first target frequency band, and the first radiator 310 supports the first target frequency band in the quarter wavelength mode, the first radiator 310 supports the first target frequency band with better radiation efficiency.

[0087] The distance d 13 may be, but is not limited to, 30 mm, or 35 mm, or 40 mm, or 45 mm, or 50 mm, or 55 mm, or 60 mm, or 65 mm, or 70 mm, or 75 mm.

[0088] The distance d 13 satisfies: 30 mm ≤ d 13 ≤ 75 mm, so that the first feed point P1 is located below the middle finger when the electronic device 1 is in the vertical state and held by the left hand of the user. In other words, when the electronic device 1 is in the vertical state and held by the left hand of the user: the distance d 11 satisfies: d 11 ≥ 89 mm, so that the first end surface 310a is located above the middle finger of the left hand; and the distance d 13 satisfies: 30 mm ≤ d 13 ≤ 75 mm, so that the first feed point P1 is located below the middle finger; therefore, the middle finger of the left hand of the user contacts the part of the branch between the first free end 312 and the first feed point P1 of the first radiator 310, and the human body (including the middle finger of the left hand) is excited by the electric field generated by the part of the branch between the first free end 312 and the first feed point P1 of the first radiator 310 and perpendicular to the second end surface 310b to exhibit radiation characteristics, so that the system radiation efficiency is higher when the electronic device 1 is in the vertical state and held by the left hand of the user.

[0089] In addition, the distance d 13satisfies: 30mm≤d 13 ≤75mm can make the first feeding point P1 be located below the thumb when the electronic device 1 is in the vertical state and held by the right hand of the user. In other words, when the electronic device 1 is in the vertical state and held by the right hand of the user: the distance d from the first end surface 310a to the bottom edge 130 11 satisfies: d 11 ≥89mm can make the first end surface 310a be located above the middle finger thumb of the right hand; the distance d from the first feeding point P1 to the bottom edge 130 13 satisfies: 30mm≤d 13 ≤75mm, the first feeding point P1 is located below the thumb; therefore, the right thumb of the user contacts the part of the branch of the first free end 312 of the first radiator 310 to the first feeding point P1, and the human body (including the right thumb) is excited to exhibit the radiation characteristic by the electric field generated by the first radiator 310 perpendicular to the second end surface 310b, so that the system radiation efficiency is higher when the electronic device 1 is in the vertical state and held by the right hand of the user.

[0090] Please further refer to Figure 2 , Figure 10 and Figure 12 , the electronic device 1 further comprises a middle frame 50, the middle frame 50 comprises a frame body 510 and a first side frame 520 bently connected to the frame body 510, the floor 10 comprises the frame body 510, the first side frame 520 is adjacent to the first side edge 120, and the first radiator 310 is located in the first side frame 520.

[0091] In an embodiment, the first radiator 310 is located in the first side frame 520, in other words, part of the first side frame 520 of the middle frame 50 of the electronic device 1 can be reused as the first radiator 310, so that the electronic device 1 can be more compact. Specifically, the first side frame 520 has a first gap 521. The frame body 510 has a second gap 522 adjacent to the first side frame 520, and the second gap 522 is bently connected and communicated with the first gap 521.

[0092] In an embodiment, the frequency of the first target frequency band is greater than or equal to 1GHz.

[0093] When the first radiator 310 supports the first target frequency band to generate an electric field perpendicular to the second end surface 310b, and when the frequency of the first target frequency band is greater than or equal to 1GHz, the first target frequency band is more likely to excite the radiation characteristic of the human body touching the first radiator 310, so that the first target frequency band has a higher radiation efficiency.

[0094] In an embodiment, the first target frequency band is a middle high band (MHB). In other embodiments, the first target frequency band can be an ultra high band (UHB) or the like.

[0095] When the first target frequency band is a middle high band or an ultra high band, the radiation characteristics of the human body are more easily excited when the user's hand touches the first radiator 310, so that the first target frequency band has better radiation efficiency.

[0096] Referring to Figure 15 , Figure 15 is a schematic diagram of an antenna assembly according to another embodiment of the present application. In this embodiment, the antenna assembly 30 further includes a first matching circuit M1. The first feed source S1 is electrically connected to the first matching circuit M1 at the first feed point P1. In an embodiment, the first matching circuit M1 is configured to match the output impedance of the first feed source S1 to the input impedance of the first radiator 310. In another embodiment, the first matching circuit M1 is configured to adjust the first target frequency band supported by the first radiator 310.

[0097] Referring to Figure 16 and Figure 17 , Figure 16 is a schematic diagram of an antenna assembly according to another embodiment of the present application; Figure 17 is Figure 16A circuit diagram of the antenna assembly is shown in FIG. 3. The antenna assembly 30 provided in any of the above embodiments further comprises a second radiator 320, a first radio frequency front-end circuit 350, and a controller 360. The second radiator 320 is adjacent to one of the top edge 110 and the bottom edge 130, and has a second feeding point P2 through which the second radiator 320 receives the first excitation signal and supports the first target frequency band under excitation of the first excitation signal. The first radio frequency front-end circuit 350 comprises a first switch 351, and the first feed source S1 is electrically connectable to one of the first feeding point P1 and the second feeding point P2 through the first switch 351. When the first feed source S1 is electrically connected to the second feeding point P2 through the first switch 351, and the intensity of the electromagnetic wave signal of the first target frequency band emitted by the second radiator 320 decays to a first intensity within a first preset time period, and the decay value is greater than or equal to a first threshold value, the controller 360 controls the first switch 351 to disconnect the electrical connection with the second feeding point P2, and controls the first switch 351 to be electrically connected with the first feeding point P1. When the first switch 351 is electrically connected with the first feeding point P1, the intensity of the electromagnetic wave signal of the first target frequency band emitted by the first radiator 310 is a second intensity, wherein the second intensity is greater than the first intensity.

[0098] In the schematic diagram of the present embodiment, the second radiator 320 is adjacent to the top edge 110 as an example, and it can be understood that this should not be construed as a limitation of the present embodiment.

[0099] The second radiator 320 can be, but is not limited to, 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, etc. The type of the second radiator 320 can be the same as or different from the type of the first radiator 310, which is not limited herein.

[0100] When the intensity of the electromagnetic wave signal of the first target frequency band emitted by the second radiator 320 attenuates within a first preset time period, and the attenuation value is greater than or equal to a first threshold value, it indicates that the performance of the second radiator 320 emitting the electromagnetic wave signal of the first target frequency band has sharply declined. Since the first feed source S1 can be electrically connected to one of the first feeding point P1 and the second feeding point P2 through the first switch 351, the controller 360 controls the first switch 351 to be electrically connected to the first feeding point P1, and then the controller 360 controls the first switch 351 to be electrically disconnected from the second feeding point P2. That is, the controller 360 switches the transmission path of the first excitation signal from the second radiator 320 to the first radiator 310. Since the second intensity is greater than the first intensity, it can be seen that when the performance of the second radiator 320 emitting the electromagnetic wave signal of the first target frequency band declines, the controller 360 controls the first feed source S1 to be electrically connected to the first feeding point P1 through the first switch 351, so as to support the first target frequency band through the first radiator 310, thereby making the antenna assembly 30 have better antenna performance in the first target frequency band.

[0101] In addition, in the embodiment, the first radio frequency front-end circuit 350 further includes a first power amplification circuit 353 and a first filter circuit 352. The first power amplification circuit 353 is configured to perform power amplification on the first excitation signal. The first filter circuit 352 is configured to filter the first excitation signal after power amplification to filter out other noise waves other than the electromagnetic waves supporting the first target frequency band.

[0102] In other embodiments, the first radio frequency front-end circuit 350 can not include the first power amplification circuit 353 and the first filter circuit 352. It can be understood that, in the embodiment, the first feed source S1 and the first radio frequency front-end circuit 350 are taken as two modules for example, and in other embodiments, the first feed source S1 can also be a module in the first radio frequency front-end circuit 350.

[0103] Please refer to Figure 18 , Figure 19 and Figure 20 , Figure 18 for a schematic view of an antenna assembly of another embodiment; Figure 19 for a partial size schematic view of the antenna assembly shown in Figure 18 for an enlarged schematic view of II in Figure 20 for an enlarged schematic view of III in Figure 18 for an enlarged schematic view of IV in Figure 16 for an enlarged schematic view of V in Figure 17The electronic device 1 provided by the embodiment, in the embodiment, the antenna assembly 30 further comprises a second feed source S2 and a third radiator 330. The second feed source S2 is used to provide a second excitation signal. The third radiator 330 is arranged adjacent to the second side edge 140. The third radiator 330 has a second ground end 331, a third feed point P3 and a second free end 332. The second ground end 331 is electrically connected to the ground plate 10, the second free end 332 is arranged adjacent to the top edge 110 compared with the second ground end 331, the third radiator 330 is electrically connected to the second feed source S2 through the third feed point P3, and supports a second target frequency band under the excitation of the second excitation signal. Wherein, the third radiator 330 has a third end face 330a away from the bottom edge 130 and a fourth end face 330b away from the first side edge 120, the distance d 21 of the third end face 330a to the bottom edge 130 satisfies: d 21 ≥89mm, the distance d 21 ’ of the third end face 330a to the top edge 110 satisfies: d 21 ’≥60mm; and when the third radiator 330 supports the second target frequency band, the third radiator 330 generates an electric field perpendicular to the fourth end face 330b (see Figure 20 ).

[0104] The distance d 21 of the third end face 330a to the bottom edge 130 satisfies: d 21 ≥89mm. The distance d 21 may be, but is not limited to, 89mm, or 90mm, or 91mm, or 92mm, or 93mm, or 94mm, or 95mm, etc.

[0105] The distance d 21 ’ of the third end face 330a to the top edge 110 satisfies: d 21 ’≥60mm. The distance d 21 ’ may be, but is not limited to, 60mm, or 61mm, or 62mm, or 63mm, or 64mm, or 65mm, etc.

[0106] The distance d 21 satisfies: d 21 ≥89mm and the distance d 21 ’ satisfies: d 21'≥60mm, so that when the electronic device 1 is in a vertical state (also called a vertical screen state), the user's finger can touch the third radiator 330. As an object with high dielectric constant characteristics, the human body has radiation performance and energy loss characteristics. When the user's finger touches the first radiator 310, the radiation characteristics of the human body are more easily manifested relative to the energy loss characteristics of the human body. In other words, since the human body has a high dielectric constant, when the user's finger touches the third radiator 330, the human body is excited by the electric field perpendicular to the fourth end face 330b generated by the first radiator 310 and exhibits radiation characteristics, so that the system radiation efficiency of the electronic device 1 is higher when it is in a vertical state and held by the user's hand.

[0107] Please refer to Figure 19 、 Figure 20 and Figure 21 , Figure 21 for Figure 20 The current diagram of the third radiator in the antenna assembly is shown in FIG. The equivalent length of the third radiator 330 is equal to the IFA antenna radiator of λ2 / 4, wherein λ2 is the wavelength corresponding to the center frequency of the second target frequency band, wherein the distance d from the connection between the second ground terminal 331 and the floor 10 to the bottom edge 130 is 22 Meet: 30mm≤d 22 ≤75mm.

[0108] In this embodiment, when the third radiator 330 is an IFA antenna radiator with an equivalent length equal to λ2 / 4, the resonant current generated by the first excitation signal exciting the third radiator 330 is distributed between the second free end 332 and the second ground end 331. In other words, the entire branch of the third radiator 330 supports the second target frequency band, and the third radiator 330 operates in a quarter-wavelength mode when supporting the second target frequency band.

[0109] The quarter-wavelength mode is also called the fundamental mode. When the entire branch of the third radiator 330 supports the second target frequency band and the third radiator 330 supports the second target frequency band and works in the quarter-wavelength mode, the third radiator 330 supports the second target frequency band with better radiation efficiency.

[0110] The distance d 12 It can be but is not limited to 30mm, or 35mm, or 40mm, or 45mm, or 50mm, or 55mm, or 60mm, or 65mm, or 70mm, or 75mm.

[0111] The distance d between the connection point between the second grounding end 331 and the floor 10 and the bottom edge 130 is 22satisfies: 30mm≤d 22 ≤75mm, the second ground end 331 is located below the middle finger; thus, the user's right thumb contacts the third radiator 330, and the human body (including the right thumb) is excited by the electric field generated by the third radiator 330 to exhibit radiation characteristics, so that the system radiation efficiency of the electronic device 1 is higher when the electronic device 1 is in a vertical state and held by the user's right hand. 11 satisfies: d 11 ≥89mm, the third end surface 330a is located above the middle finger of the right hand; the distance d 12 satisfies: 30mm≤d 12 ≤75mm, the second ground end 331 is located below the middle finger; thus, the user's right thumb contacts the third radiator 330, and the human body (including the right thumb) is excited by the electric field generated by the third radiator 330 to exhibit radiation characteristics, so that the system radiation efficiency of the electronic device 1 is higher when the electronic device 1 is in a vertical state and held by the user's right hand.

[0112] In addition, the distance d 22 satisfies: 30mm≤d 22 ≤75mm, the second ground end 331 is located below the middle finger; thus, the user's right thumb contacts the third radiator 330, and the human body (including the right thumb) is excited by the electric field generated by the third radiator 330 to exhibit radiation characteristics, so that the system radiation efficiency of the electronic device 1 is higher when the electronic device 1 is in a vertical state and held by the user's right hand. 21 satisfies: d 21 ≥89mm, the third end surface 330a is located above the middle finger of the right hand; the distance d 22 satisfies: 30mm≤d 22 ≤75mm, the second ground end 331 is located below the middle finger; thus, the user's right thumb contacts the third radiator 330, and the human body (including the right thumb) is excited by the electric field generated by the third radiator 330 to exhibit radiation characteristics, so that the system radiation efficiency of the electronic device 1 is higher when the electronic device 1 is in a vertical state and held by the user's right hand.

[0113] Please refer to Figure 22 , Figure 23 and Figure 24 , Figure 22 a schematic view of a third radiator shown in another embodiment; Figure 23 is Figure 22 a schematic view of current distribution of the third radiator in the middle.Figure 24 For Figure 22 the third radiator in the third radiator 330 and other components is shown in the schematic diagram. The third radiator 330 is an IFA antenna radiator with an equivalent length of 3λ2 / 4, where λ2is the wavelength corresponding to the center frequency of the second target frequency band, and the distance d 22 satisfies: 30mm≤d 22 ≤75mm.

[0114] In the embodiment, when the third radiator 330 is an IFA antenna radiator with an equivalent length of 3λ2 / 4, the resonant current distribution generated by the first excitation signal exciting the third radiator 330 is distributed between the second free end 332 and the second ground end 331, in other words, the entire branch of the third radiator 330 supports the second target frequency band, and the third radiator 330 supports the second target frequency band when it works in the three-quarter wavelength mode.

[0115] The three-quarter wavelength mode is also called high-order mode, when the entire branch of the third radiator 330 supports the second target frequency band, and the third radiator 330 supports the second target frequency band when it works in the three-quarter wavelength mode, the wavelength mode of the third radiator 330 can be fully utilized to support the second target frequency band.

[0116] The distance d 22 may be, but is not limited to, 30mm, or 35mm, or 40mm, or 45mm, or 50mm, or 55mm, or 60mm, or 65mm, or 70mm, or 75mm.

[0117] The distance d 22 from the connection of the second ground end 331 and the ground plate 10 to the bottom edge 130 satisfies: 30mm≤d 22 ≤75mm can make the second ground end 331 be located below the middle finger when the electronic device 1 is in a vertical state and held by the left hand of the user. In other words, when the electronic device 1 is in a vertical state and held by the left hand of the user: the distance d 21 from the third end face 330a to the bottom edge 130 satisfies: d 21 ≥89mm can make the third end face 330a be located above the middle finger of the left hand; and the distance d 22 from the connection of the second ground end 331 and the ground plate 10 to the bottom edge 130 satisfies: 30mm≤d 22≤75mm, so that the second grounding end 331 is located below the middle finger; thus, the left middle finger of the user contacts the third radiator 330, and then the human body (including the left middle finger) is excited by the electric field generated by the third radiator 330 to present a radiation characteristic, so that the electronic device 1 is in a vertical state and has a high system radiation efficiency when being held by the left hand of the user.

[0118] In addition, the distance d from the connection of the second grounding end 331 with the ground plate 10 to the bottom edge 130 22 satisfies: 30mm≤d 22 ≤75mm, so that the second grounding end 331 is located below the middle finger; thus, the left middle finger of the user contacts the third radiator 330, and then the human body (including the left middle finger) is excited by the electric field generated by the third radiator 330 to present a radiation characteristic, so that the electronic device 1 is in a vertical state and has a high system radiation efficiency when being held by the left hand of the user. 21 satisfies: d 21 ≥89mm, so that the third end face 330a is located above the middle finger of the right hand; the distance d from the connection of the second grounding end 331 with the ground plate 10 to the bottom edge 130 22 satisfies: 30mm≤d 22 ≤75mm, so that the second grounding end 331 is located below the thumb; thus, the right thumb of the user contacts the third radiator 330, and then the human body (including the right thumb) is excited by the electric field generated by the third radiator 330 to present a radiation characteristic, so that the electronic device 1 is in a vertical state and has a high system radiation efficiency when being held by the right hand of the user.

[0119] Please refer to Figure 25 , Figure 26 and Figure 27 , Figure 25 a schematic view of a third radiator shown in another embodiment; Figure 26 a schematic view of current distribution of the third radiator; Figure 27 a schematic view of the third feeding point of the antenna assembly in Figure 25 to the bottom edge. The third radiator 330 is a monopole antenna radiator with an equivalent length of λ2 / 4 from the second free end 332 to the third feeding point P3, and the distance d from the third feeding point P3 to the bottom edge 130 23 satisfies: 30mm≤d 23 ≤75mm.

[0120] In the embodiment, when the third radiator 330 is a monopole antenna radiator with an equivalent length of λ2 / 4, the second excitation signal excites the third radiator 330 to generate a resonant current mainly distributed between the second free end 332 and the third feed point P3 of the third radiator 330, in other words, the part of the branch between the second free end 332 and the third feed point P3 of the third radiator 330 supports the second target frequency band, and the third radiator 330 supports the second target frequency band when working in a quarter wavelength mode.

[0121] The quarter wavelength mode is also called a base mode, when the part of the branch between the second free end 332 and the third feed point P3 of the third radiator 330 supports the second target frequency band, and the third radiator 330 supports the second target frequency band when working in a quarter wavelength mode, the third radiator 330 supports the second target frequency band with better radiation efficiency.

[0122] The distance d 23 may be, but is not limited to, 30 mm, or 35 mm, or 40 mm, or 45 mm, or 50 mm, or 55 mm, or 60 mm, or 65 mm, or 70 mm, or 75 mm.

[0123] The distance d 23 satisfies: 30 mm ≤ d 23 ≤ 75 mm, so that the third feed point P3 is located below the middle finger when the electronic device 1 is in a vertical state and held by the left hand of the user. In other words, when the electronic device 1 is in a vertical state and held by the left hand of the user: the distance d 21 satisfies: d 21 ≥ 89 mm, so that the third end face 330a is located above the middle finger of the left hand; and the distance d 23 satisfies: 30 mm ≤ d 23 ≤ 75 mm, so that the third feed point P3 is located below the middle finger; therefore, the middle finger of the left hand of the user contacts the part of the branch between the second free end 332 and the third feed point P3 of the third radiator 330, and the human body (including the middle finger of the left hand) is excited by the electric field generated by the part of the branch between the second free end 332 and the third feed point P3 of the third radiator 330 and perpendicular to the fourth end face 330b to exhibit radiation characteristics, so that the system radiation efficiency is higher when the electronic device 1 is in a vertical state and held by the left hand of the user.

[0124] In addition, the distance d 23satisfies: 30mm≤d 23 ≤75mm can make the third feeding point P3 be located below the thumb when the electronic device 1 is in the vertical state and held by the right hand of the user. In other words, when the electronic device 1 is in the vertical state and held by the right hand of the user: the distance d 11 satisfies: d 11 ≥89mm can make the third end surface 330a be located above the middle finger thumb of the right hand; the distance d 23 satisfies: 30mm≤d 23 ≤75mm, can make the third feeding point P3 be located below the thumb; therefore, the right thumb of the user contacts the part of the branch between the second free end 332 of the third radiator 330 and the third feeding point P3, and then the human body (including the right thumb) is excited by the electric field generated by the third radiator 330 which is perpendicular to the fourth end surface 330b to present the radiation characteristics, so that the system radiation efficiency of the electronic device 1 is higher when the electronic device 1 is in the vertical state and held by the right hand of the user.

[0125] Please further refer to Figure 18 , Figure 22 and Figure 25 , the electronic device 1 further comprises a middle frame 50, the middle frame 50 comprises a frame body 510 and a second side frame 530 which is bently connected to the frame body 510, the second side frame 530 is adjacent to the second side 140, and the third radiator 330 is located in the second side frame 530.

[0126] In an embodiment, the third radiator 330 is located in the second side frame 530, in other words, part of the second side frame 530 of the middle frame 50 of the electronic device 1 can be reused as the third radiator 330, so that the electronic device 1 can be more compact. Specifically, the second side frame 530 has a third gap 531. The frame body 510 has a fourth gap 532 adjacent to the second side frame 530, and the fourth gap 532 is bently connected and communicated with the third gap 531.

[0127] In an embodiment, the third gap 531 is flush with the first gap 521. In other embodiments, the third gap 531 is misaligned with the first gap 521, and the relative positional relationship between the third gap 531 and the first gap 521 is not limited in this embodiment.

[0128] Please refer to Figure 28 and Figure 29 , Figure 28 is a schematic view of an antenna assembly of another embodiment; Figure 29 isFigure 28 The antenna assembly shown in the circuit diagram of the antenna assembly. In combination with the first radiator 310, the second radiator 320, the third radiator 330, the first feed source S1 and the second feed source S2, in the present embodiment, the antenna assembly 30 further comprises a fourth radiator 340 and a second radio frequency front-end circuit 370. The fourth radiator 340 is adjacent to the other one of the top edge 110 and the bottom edge 130. The fourth radiator 340 has a fourth feeding point P4, through which the fourth radiator 340 receives the second excitation signal and supports the second target frequency band under the excitation of the second excitation signal. The second radio frequency front-end circuit 370 comprises a second switch 371, through which the second feed source S2 can be electrically connected to one of the third feeding point P3 and the fourth feeding point P4. When the second feed source S2 is electrically connected to the fourth feeding point P4 through the second switch 371, and the electromagnetic wave signal of the second target frequency band emitted by the fourth radiator 340 decays to a third intensity within a second preset time period, and the decay value is greater than or equal to a second threshold value, the controller 360 controls the second switch 371 to be electrically disconnected from the fourth feeding point P4, and controls the second switch 371 to be electrically connected to the third feeding point P3; when the second switch 371 is electrically connected to the third feeding point P3, the intensity of the electromagnetic wave signal of the first target frequency band emitted by the third radiator 330 is a fourth intensity, wherein the fourth intensity is greater than the third intensity.

[0129] In the schematic diagram of the present embodiment, the fourth radiator 340 is adjacent to the bottom edge 130, and the second radiator 320 is adjacent to the edge. In other embodiments, the second radiator 320 can be adjacent to the bottom edge 130, and the fourth radiator 340 can be adjacent to the top edge 110.

[0130] The fourth radiator 340 can be, but is not limited to, 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, etc. The type of the fourth radiator 340 can be the same as or different from the type of the third radiator 330, which is not limited herein.

[0131] When the intensity of the electromagnetic wave signal of the second target frequency band emitted by the fourth radiator 340 attenuates within a second preset time period, and the attenuation value is greater than or equal to a second threshold value, it indicates that the performance of the fourth radiator 340 emitting the electromagnetic wave signal of the second target frequency band sharply decreases. Since the second feed source S2 can be electrically connected to one of the third feeding point P3 and the fourth feeding point P4 through the second switch 371, the controller 360 controls the second switch 371 to be electrically connected with the third feeding point P3, and then the controller 360 controls the second switch 371 to be electrically disconnected with the fourth feeding point P4. That is, the controller 360 switches the transmission path of the second excitation signal from the fourth radiator 340 to the third radiator 330. Since the fourth intensity is greater than the third intensity, it can be seen that when the performance of the fourth radiator 340 emitting the electromagnetic wave signal of the second target frequency band decreases, the controller 360 controls the second feed source S2 to be electrically connected to the third feeding point P3 through the second switch 371, so as to support the second target frequency band through the third radiator 330, thereby making the antenna assembly 30 have better antenna performance in the second target frequency band.

[0132] In addition, in the embodiment (see Figure 29 ), the first radio frequency front-end circuit 350 further includes a first power amplification circuit 353 and a first filter circuit 352. The first power amplification circuit 353 is configured to perform power amplification on the first excitation signal. The first filter circuit 352 is configured to filter the first excitation signal after power amplification to filter out other noise other than the electromagnetic wave supporting the first target frequency band.

[0133] In other embodiments, the first radio frequency front-end circuit 350 can not include the first power amplification circuit 353 and the first filter circuit 352.

[0134] It can be understood that, in the embodiment, the first feed source S1 and the first radio frequency front-end circuit 350 are taken as two modules for example, and in other embodiments, the first feed source S1 can also be a module in the first radio frequency front-end circuit 350.

[0135] In addition, in the embodiment (see Figure 29 ), the second radio frequency front-end circuit 370 further includes a second power amplification circuit 373 and a second filter circuit 372. The second power amplification circuit 373 is configured to perform power amplification on the first excitation signal. The second filter circuit 372 is configured to filter the first excitation signal after power amplification to filter out other noise other than the electromagnetic wave supporting the first target frequency band.

[0136] In other embodiments, the second radio frequency front-end circuit 370 can not include the second power amplification circuit 373 and the second filter circuit 372.

[0137] It can be understood that in the present embodiment, the second feed S2 and the second radio frequency front-end circuit 370 are taken as two modules for example, and in other embodiments, the second feed S2 can also be a module in the second radio frequency front-end circuit 370.

[0138] In an embodiment, the first target frequency band is an MHB frequency band, and the second target frequency band is an MHB frequency band.

[0139] When the first target frequency band and the second target frequency band are both MHB, the antenna assembly 30 has good antenna performance in the MHB frequency band, which can meet the needs of the antenna assembly 30 in the MHB frequency band communication antenna performance, and can be adapted to the communication application scenarios of the electronic device 1 in the MHB frequency band.

[0140] Please refer to Figure 30 and Figure 31 , Figure 30 is a schematic view of an antenna assembly of another embodiment; Figure 31 is Figure 30A circuit diagram of the antenna assembly is shown in FIG. 6. The present embodiment can be incorporated into the antenna assembly 30 of the above-described embodiments. The floor 10 further comprises a second side edge 140, which is bent and connected to the top edge 110 and the bottom edge 130, respectively, and which is opposite to and spaced apart from the first side edge 120. The antenna assembly 30 further comprises a third radiator 330, a fourth radiator 340, a radio frequency front-end circuit 380, and a controller 360. The third radiator 330 is disposed adjacent to the second side edge 140, and has a second ground end 331 electrically connected to the floor 10, a third feed point P3, and a second free end 332 disposed adjacent to the top edge 110 relative to the second ground end 331. The third radiator 330 receives the first excitation signal through the third feed point P3 and supports the first target frequency band under excitation of the first excitation signal. The fourth radiator 340 is disposed adjacent to the other one of the top edge 110 and the bottom edge 130, and has a fourth feed point P4. The fourth radiator 340 receives the first excitation signal through the fourth feed point P4 and supports the first target frequency band under excitation of the first excitation signal. The radio frequency front-end circuit 380 comprises a switch 381. The first feed source S1 is electrically connected to one of the first feed point P1, the second feed point P2, the third feed point P3, and the fourth feed point P4 through the switch 381. When the intensity of the currently working one of the first radiator 310, the second radiator 320, the third radiator 330, and the fourth radiator 340 decays to a fifth intensity in a third preset time period, and the decay value is greater than or equal to a third threshold value, the controller 360 controls the switch 381 to disconnect the electrical connection to the currently working one and to electrically connect to another one of the first radiator 310, the second radiator 320, the third radiator 330, and the fourth radiator 340, wherein the another one emits an electromagnetic wave signal of the first target frequency band with a sixth intensity, wherein the sixth intensity is greater than the fifth intensity.

[0141] When the one of the first radiator 310, the second radiator 320, the third radiator 330 and the fourth radiator 340 currently working attenuates in a third preset time, and the attenuation value is greater than or equal to a third threshold value, it indicates that the one emitting the electromagnetic wave signal of the first target frequency band has a sharp performance decline. The controller 360 controls the switch 381 to be electrically connected to another one of the first radiator 310, the second radiator 320, the third radiator 330 and the fourth radiator 340. Since the sixth intensity is greater than the fifth intensity, it can be seen that when the one emitting the electromagnetic wave signal of the first target frequency band has a performance decline, the controller 360 can control the switch 381 to be electrically connected to the another one, so that the antenna assembly has better antenna performance in the first target frequency band.

[0142] In the embodiment, the switching of the radiators supported by the four antenna radiators in the first target frequency band can be realized by one radio frequency front-end circuit 380.

[0143] In the embodiment, the radio frequency front-end circuit 380 further includes a power amplification circuit 383 and a filtering circuit 382. The power amplification circuit 383 is used for amplifying the power of the first excitation signal. The filtering circuit 382 is used for filtering the first excitation signal after power amplification to filter out other noise other than the electromagnetic wave supporting the first target frequency band.

[0144] In other embodiments, the radio frequency front-end circuit 380 can not include the power amplification circuit 383 and the filtering circuit 382.

[0145] It can be understood that in the embodiment, the first feed S1 and the radio frequency front-end circuit 380 are taken as two modules for example, and in other embodiments, the first feed S1 can also be a module in the radio frequency front-end circuit 380.

[0146] It can be understood that in an embodiment, the antenna assembly 30 further includes a second matching circuit, which is connected in series in the path of the first feed S1 to the second feed point P2. It can be understood that in other embodiments, the antenna assembly 30 further includes a third matching circuit, and the second feed S2 electrically connects the third matching circuit to the third feed point P3. In other embodiments, the antenna assembly 30 further includes a fourth matching circuit, which is connected in series in the path of the second feed S1 to the fourth feed point P4.

[0147] Next, the performance of the antenna assembly 30 provided by an embodiment of the application is simulated.

[0148] Please refer to Figure 32 ,Figure 32 The S parameter diagram of the antenna assembly provided for an embodiment of the present application in various cases is shown in the following simulation diagram. In the simulation diagram, the horizontal axis is frequency (Frequency) in GHz, and the vertical axis is S parameter (S Parameter) in dB. In the simulation diagram, the antenna assembly 30 provided for an embodiment of the present application is taken as an example and simulated in the first target frequency band B3 (1.71-1.88 GHz). Curve ① is the S1,1 curve of the antenna assembly 30 when the electronic device 1 is held by both hands in the horizontal state (also referred to as the horizontal screen state), which is marked as S1,1 double-hand horizontal holding in the diagram. Curve ② is the S1,1 curve of the antenna assembly 30 when the electronic device 1 is held by the right hand in the vertical state (also referred to as the vertical screen state), which is marked as S1,1 right-hand vertical holding in the diagram. Curve ③ is the S1,1 curve of the antenna assembly 30 when the electronic device 1 is in free space, which is marked as S1,1 free space in the diagram. Curve ④ is the S1,1 curve of the antenna assembly 30 when the electronic device 1 is held by the left hand in the vertical state (also referred to as the vertical screen state), which is marked as S1,1 left-hand vertical holding in the diagram. As can be seen from the simulation diagram, the reflection coefficient S1,1 is improved after being held by the user, which is mainly due to the participation of the hand in radiation and loss. In addition, the reflection coefficient S1,1 curve shifts to low frequency at the lowest point when the electronic device 1 is held by the left hand in the vertical state and when the electronic device 1 is held by the right hand in the vertical state, which is mainly due to the hand acting as a high dielectric constant medium.

[0149] Please refer to Figure 33 , Figure 33The antenna assembly provided in an embodiment of the present application is simulated in various cases. In the simulation, the horizontal axis is frequency (GHz), and the vertical axis is efficiency (dB). In the simulation, the antenna assembly 30 in the electronic device 1 is taken as an example, and the first target frequency band is the B3 frequency band (1.71-1.88 GHz). Curve ① is the system radiation efficiency (System Rad. Efficiency) curve of the antenna assembly 30 when the electronic device 1 is in a horizontal state and held by two hands (referred to as two-hand horizontal holding); curve ② is the system radiation efficiency (System Rad. Efficiency) curve when the electronic device 1 is in a vertical state and held by the right hand (referred to as right-hand vertical holding); curve ③ is the system radiation efficiency curve when the electronic device 1 is in free space; curve ④ is the system radiation efficiency curve when the electronic device 1 is in a vertical state and held by the left hand; curve ⑤ is the system total efficiency (System Total Efficiency) curve of the antenna assembly 30 when the electronic device 1 is in a horizontal state and held by two hands (referred to as two-hand horizontal holding); curve ⑥ is the system total efficiency (System Total Efficiency) curve when the electronic device 1 is in a vertical state and held by the right hand (referred to as right-hand vertical holding); curve ⑦ is the system total efficiency (System Total Efficiency) curve when the electronic device 1 is in free space; and curve ⑧ is the system total efficiency (System Total Efficiency) curve when the electronic device 1 is in a vertical state and held by the left hand. As shown in the simulation, the average system radiation efficiency (also referred to as average radiation efficiency) of the antenna assembly 30 in free space is -5.7 dB, and the average system total efficiency (also referred to as system efficiency) is -7.7 dB. When the right hand is held vertically, the average system radiation efficiency is -3.7 dB, the average system total efficiency is -4.5 dB, and the system total efficiency is improved by nearly 3.2 dB compared with the system total efficiency in free space. When the left hand is held vertically, the average radiation efficiency is -4.8 dB, the system efficiency is -6 dB, and the system efficiency is improved by nearly 3.2 dB compared with the system efficiency in free space. When two hands are held horizontally, the average radiation efficiency is -7.1 dB, the system efficiency is -8.5 dB, and the system efficiency is deteriorated by 0.8 dB compared with free space, which is mainly due to the small electric field exciting the little finger when two hands are held horizontally. In addition, the loss of the hands not excited by the electric field is increased when two hands are held.

[0150] In summary, the antenna assembly 30 in the electronic device 1 provided by the embodiment of the present application defines the position, slot and ground point (i.e. the position of the ground terminal) of the radiator working at a frequency greater than or equal to 1 GHz based on the scenarios of right-hand vertical holding, left-hand vertical holding and two-hand horizontal holding, so that better antenna performance than free space can be achieved in the vertical holding (right-hand vertical holding and left-hand vertical holding) scenarios, such as Over-the-Air Technology (OTA) performance. In particular, under the trend of the full-screen development of the electronic device 1, the antenna assembly 30 provided by the embodiment of the present application can significantly improve the performance of the antenna under the limit of the small clearance of the electronic device 1, and the performance is improved by at least 1.7 dB. In addition, according to the characteristics of right-hand vertical holding, left-hand vertical holding and two-hand horizontal holding, the position of the first radiator 310 is determined to take into account the use scenarios of right-hand vertical holding, left-hand vertical holding and two-hand horizontal holding. When the antenna assembly 30 further includes a third radiator 330, the position of the third radiator 330 is also determined to take into account the use scenarios of right-hand vertical holding, left-hand vertical holding and two-hand horizontal holding. So that the OTA performance of the antenna assembly 30 in the two-hand horizontal holding scenario decreases less (only decreases by 0.8 dB) compared with free space. Therefore, the antenna assembly 30 provided by the embodiment of the present application can take into account the OTA performance of the antenna in the right-hand vertical holding, left-hand vertical holding and two-hand horizontal holding scenarios, so that the user has a better experience when using the electronic device 1.

[0151] As introduced above, the first radiator 310 includes three embodiments: the first embodiment is that the first radiator 310 is an IFA antenna radiator with an equivalent length (i.e. electrical length) of λ1 / 4; the second embodiment is that the first radiator 310 is an IFA antenna radiator with an equivalent length of 3λ1 / 4; the third embodiment is that the first radiator 310 is a monopole antenna radiator with an equivalent length from the first free end 312 to the first feeding point P1 of λ1 / 4. In an embodiment, for the vertical holding scenario (including right hand vertical holding, left hand vertical holding), based on the first radiator 310 of the three embodiments introduced above, the first radiator 310 lower than the first embodiment, the second embodiment and the third embodiment: requires the position of the first gap 521 (i.e. the first end surface 310a) of the first radiator 310 to be higher than the middle finger in the left hand vertical holding scenario, and requires the position of the first gap 521 (i.e. the first end surface 310a) of the first radiator 310 to be higher than the right thumb in the right hand vertical holding scenario. In addition, for the first radiator 310 of the first embodiment and the second embodiment, the connection (i.e. the return point) of the first ground end 311 of the first radiator 310 to the ground plate 10 is lower than the position where the middle finger contacts the first radiator 310 in the left hand vertical holding scenario, and the connection (i.e. the return point) of the first ground end 311 of the first radiator 310 to the ground plate 10 is lower than the position where the thumb contacts the first radiator 310 in the right hand vertical holding scenario. For the third embodiment, the position of the feeding point of the first radiator 310 is lower than the position where the middle finger contacts the first radiator 310 in the left hand vertical holding scenario, and the position of the feeding point of the first radiator 310 is lower than the position where the thumb contacts the first radiator 310 in the right hand vertical holding scenario.

[0152] In addition, in addition to the above conditions based on the left hand vertical holding scenario and the right hand vertical holding scenario, in an embodiment, it is also required that the distance between the first end surface 310a (i.e. the first gap 521) of the first radiator 310 and its nearest thumb be less than λ1 / 8, and in addition, the first end surface 310a (i.e. the first gap 521) is also located between the two thumbs.

[0153] In addition, in an embodiment, an antenna architecture of four MHB antenna radiators is proposed, which can achieve good antenna OTA performance in the left hand vertical holding, right hand vertical holding and double hand horizontal lying scenarios.

[0154] In an embodiment, the first radiator 310 and the second radiator 320 supporting the first target frequency band can be switched by using the first radio frequency front-end circuit 350, and the third radiator 330 and the fourth radiator 340 supporting the second target frequency band can be switched by using the second radio frequency front-end circuit 370. That is, two pairs of antenna radiators are switched by using two radio frequency front-end circuits.

[0155] In other embodiments, a radio frequency front end circuit can be utilized to implement the switching of the four antenna radiators.

[0156] It should be noted that in an embodiment, the electronic device 1 further comprises a USB port. The USB port is arranged corresponding to the bottom edge 130 of the floor 10. When the electronic device 1 is in a landscape state (or a landscape screen state), and the USB port is located on the right side of the electronic device 1, this time is also referred to as a USB port rightward landscape state, or a USB port rightward landscape screen state. When the electronic device 1 is in a landscape state (or a landscape screen state), and the USB port is located on the left side of the electronic device 1, this time is also referred to as a USB port leftward landscape state, or a USB port leftward landscape screen state.

[0157] In an embodiment, the electronic device 1 further comprises a display screen 70, a middle frame 50, and a shell 90 (also referred to as a battery cover). The display screen 70 and the shell 90 are arranged on opposite sides of the middle frame 50, respectively. The middle frame 50, the shell 90, and at least one of the display screen 70 further form a receiving space. The electronic device 1 further comprises a battery, functional devices (the functional devices can include one or more of a camera module, a microphone, a receiver, a speaker, a face recognition module, a fingerprint recognition module, etc.), and other devices capable of realizing the basic functions of a mobile phone, which will not be described in detail in this embodiment. It can be understood that the above description of the electronic device 1 is only a description of an environment in which the antenna assembly 30 is applied, and the specific structure of the electronic device 1 should not be understood as a limitation of the antenna assembly 30 provided by the present application.

[0158] The above is part of the embodiments of the present application. It should be noted that for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which are also considered within the scope of protection of the present application.

Claims

1. An electronic device, comprising: The electronic device comprises a floor and an antenna assembly, the floor comprises a top edge, a first side edge, a bottom edge and a second side edge connected in sequence by bending, the top edge and the bottom edge are located on the same side of the first side edge, the second side edge is connected to the top edge and the bottom edge by bending respectively, and the second side edge is arranged apart from the first side edge; the antenna assembly comprises: a first feed source providing a first excitation signal; and a first radiator arranged adjacent to the first side edge, the first radiator has a first ground terminal, a first feed point and a first free end, the first ground terminal is electrically connected to the floor, the first free end is arranged adjacent to the top edge compared with the first ground terminal, the first radiator is electrically connected to the first feed source through the first feed point, and supports a first target frequency band under the excitation of the first excitation signal; wherein the first free end has a first end face facing away from the bottom edge and a second end face facing away from the second side edge, the distance d 11 satisfies: d 11 ≥ 89 mm, the distance d 11 ' of the first end face to the top edge satisfies: d 11 ' ≥ 60 mm; and when the first radiator supports the first target frequency band, the first radiator generates an electric field perpendicular to the second end face.

2. The electronic device according to claim 1, wherein The first radiator is an IFA antenna radiator with an equivalent length equal to λ 1 / 4, wherein λ 1 is a wavelength corresponding to a center frequency point of the first target frequency band, and wherein a distance d from a connection of the first ground end to the ground plate to the bottom side is 30mm≤d≤75mm. 12 30mm≤d≤75mm. 12 30mm≤d≤75mm. or, The first radiator is an IFA antenna radiator with an equivalent length of 3λ 1 / 4, wherein λ 1 is a wavelength corresponding to a center frequency point of the first target frequency band, and wherein a distance d from a connection of the first ground end to the ground plate to the bottom side 12 30mm≤d 12 ≤75mm.

3. The electronic device of claim 1, wherein, The first radiator is a monopole antenna radiator with an equivalent length of λ1 / 4 from the first free end to the first feed point, and a distance d from the first feed point to the bottom side 13 satisfies: 30mm ≤ d 13 ≤ 75mm.

4. The electronic device of claim 1, wherein, the electronic device further comprises a middle frame, the middle frame comprises a frame body and a first bezel connected to the frame body by bending, the floor comprises the frame body, and the first bezel is arranged adjacent to the first side edge, and the first radiator is located in the first bezel.

5. The electronic device of claim 1, wherein, The frequency of the first target frequency band is greater than or equal to 1 GHz.

6. The electronic device of any of claims 1-5, wherein, The antenna assembly further comprises: a second radiator, the second radiator is arranged adjacent to one of the top edge and the bottom edge, the second radiator has a second feed point, the second radiator receives the first excitation signal through the second feed point, and supports the first target frequency band under the excitation of the first excitation signal; a first radio frequency front-end circuit, the first radio frequency front-end circuit comprises a first switch, the first feed source can be electrically connected to one of the first feed point and the second feed point through the first switch; and a controller; when the first feed source is electrically connected to the second feed point through the first switch, and the intensity of the electromagnetic wave signal of the first target frequency band emitted by the second radiator decays to a first intensity within a first preset time period, and the decay value is greater than or equal to a first threshold value, the controller controls the first switch to disconnect the electrical connection with the second feed point, and controls the first switch to be electrically connected with the first feed point; when the first switch is electrically connected with the first feed point, the intensity of the electromagnetic wave signal of the first target frequency band emitted by the first radiator is a second intensity, wherein the second intensity is greater than the first intensity.

7. The electronic device of claim 6, wherein, The antenna assembly further comprises: a second feed source providing a second excitation signal; and a third radiator arranged adjacent to the second side edge, the third radiator has a second ground terminal, a third feed point and a second free end, the second ground terminal is electrically connected to the floor, the second free end is arranged adjacent to the top edge compared with the second ground terminal, the third radiator is electrically connected to the second feed source through the third feed point, and supports a second target frequency band under the excitation of the second excitation signal; wherein the third radiator has a third end face facing away from the bottom edge and a fourth end face facing away from the first side edge, the distance d 21 satisfies: d 21 ≥ 89 mm, the distance d 21 ’ of the third end face to the top edge satisfies: d 21 ’ ≥ 60 mm; and when the third radiator supports the second target frequency band, the third radiator generates an electric field perpendicular to the fourth end face.

8. The electronic device of claim 7, the third radiator having an equivalent length equal to an IFA antenna radiator of λ2 / 4, where, The λ2 is a wavelength corresponding to a center frequency point of the second target frequency band, wherein the distance d from the connection of the second ground terminal and the floor to the bottom side 22 satisfies: 30mm≤d 22 ≤75mm; or, The third radiator is an IFA antenna radiator with an equivalent length of 3λ 2 / 4, where λ 2 is the wavelength corresponding to the center frequency of the second target frequency band, and d is the distance from the connection of the second ground terminal and the floor to the bottom side 22 30mm≤d 22 ≤75mm.

9. The electronic device of claim 8, wherein, The third radiator is a monopole antenna radiator with an equivalent length of λ2 / 4 from the second free end to the third feed point, and a distance d from the third feed point to the bottom side 23 satisfies: 30mm ≤ d 23 ≤ 75mm.

10. The electronic device of claim 7, wherein, The electronic device further includes a middle frame, which includes a frame body and a second frame bent and connected to the frame body. The second frame is adjacent to the second side, and the third radiator is located on the second frame.

11. The electronic device of claim 7, wherein, The antenna assembly further includes: a fourth radiator, adjacent to the other of the top side and the bottom side, the fourth radiator having a fourth feeding point, receiving the second excitation signal through the fourth feeding point, and supporting a second target frequency band under the excitation of the second excitation signal; a second RF front-end circuit, the second RF front-end circuit comprising a second switch, and the second feed source can be electrically connected to one of the third feed point and the fourth feed point through the second switch; When the second feed source is electrically connected to the fourth feeding point through the second switch, and the electromagnetic wave signal of the second target frequency band emitted by the fourth radiator attenuates to a third intensity within a second preset time period, and the attenuation value is greater than or equal to a second threshold, the controller controls the second switch to disconnect the electrical connection with the fourth feeding point, and controls the second switch to be electrically connected to the third feeding point; when the second switch is electrically connected to the third feeding point, the intensity of the electromagnetic wave signal of the first target frequency band emitted by the third radiator is a fourth intensity, wherein the fourth intensity is greater than the third intensity.

12. The electronic device of claim 11, wherein, The first target frequency band is the MHB frequency band, and the second target frequency band is the MHB frequency band.

13. The electronic device of claim 7, wherein, The antenna assembly further includes: a third radiator, disposed adjacent to the second side edge, the third radiator having a second ground end, a third feeding point, and a second free end, the second ground end being electrically connected to the floor, the second free end being disposed adjacent to the top edge relative to the second ground end, the third radiator receiving the first excitation signal through the third feeding point, and supporting the first target frequency band under excitation by the first excitation signal; a fourth radiator, adjacent to the other of the top side and the bottom side, the fourth radiator having a fourth feeding point, receiving the first excitation signal through the fourth feeding point, and supporting a first target frequency band under the excitation of the first excitation signal; and a radio frequency front-end circuit, the radio frequency front-end circuit comprising a switch, the first feed source being electrically connected to one of the first feed point, the second feed point, the third feed point, and the fourth feed point via the switch; When the intensity of the currently working one of the first radiator, the second radiator, the third radiator and the fourth radiator decays to the fifth intensity within the third preset time period, and the attenuation value is greater than or equal to the third threshold, the controller controls the switch to disconnect the electrical connection with the currently working one, and electrically connect to the other one of the first radiator, the second radiator, the third radiator and the fourth radiator, wherein the intensity of the electromagnetic wave signal of the first target frequency band emitted by the other one is the sixth intensity, and wherein the sixth intensity is greater than the fifth intensity.

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