Electronic device

Abstract

The invention provides an electronic device. The electronic equipment 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 sequentially connected in a bent mode. The antenna assembly comprises a first feed source for providing a first excitation signal and a first radiator; the first radiating body is arranged adjacent to the first side edge and is provided with a first grounding end, a first feeding point and a first free end, the first grounding end is electrically connected to the floor, and the first free end is arranged adjacent to the top edge compared with the first grounding end; the first radiator is electrically connected to a first feed source through a first feed point and supports a first target frequency band under the excitation of a first excitation signal; the first free end is provided with a first end face deviating from the bottom edge and a second end face deviating from the second side edge, the distance d11 from the first end face to the bottom edge is larger than or equal to 89 mm, the distance d11 'from the first end face to the top edge is larger than or equal to 60 mm, 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 field of communication technology, and in particular to an electronic device. Background Art

[0002] Mobile phones and other electronic devices have communication functions because they include antenna components, and therefore are widely used. Mobile phones and other electronic devices are usually held by users when in use. However, in the related art, when an electronic device is held by a user, the performance of the antenna component in the electronic device will decrease. Summary of the invention

[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 which are bent and connected in sequence, the top edge and the bottom edge are both located on the same side of the first side edge, the second side edge is bent and connected to the top edge and the bottom edge respectively, and the second side edge is opposite to the first side edge and is arranged at intervals; the antenna assembly comprises:

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

[0005] a first radiator, disposed adjacent to the first side edge, the first radiator having a first ground end, a first feeding point, and a first free end, the first ground end being electrically connected to the floor, the first free end being disposed 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 feeding point, and supporting a first target frequency band under the excitation of the first excitation signal;

[0006] The first free end has a first end surface away from the bottom edge and a second end surface away from the second side edge, and the distance d from the first end surface to the bottom edge is 11 Satisfaction:d 11 ≥89mm, the distance d from the first end surface to the top edge 11 'Satisfied: 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, in the antenna assembly of the electronic device provided in the embodiment of the present application, the distance d from the first end surface to the bottom edge is 11 Satisfaction:d 11 ≥89mm, the distance d from the first end surface to the top edge 11 'Satisfied: D 11'≥60mm, the electronic device can be in a vertical state, and the user's finger can touch the first radiator. The first radiator generates an electric field perpendicular to the second end face. Therefore, since the human body has a high dielectric constant, when the user's finger touches the first radiator, the human body is stimulated by the electric field perpendicular to the second end face generated by the first radiator and exhibits radiation characteristics, so that the electronic device is in a vertical state and the system radiation efficiency is high when it is held by the user's hand. In addition, the distance d from the first end face to the bottom edge is 11 Satisfaction:d 11 ≥89mm, the distance d from the first end surface to the top edge 11 'Satisfied: D 11 '≥60mm, so that when the electronic device is in a horizontal state, the first radiator is not touched by the user's finger and is less blocked, thereby making the first radiator have better antenna performance when the electronic device is in a horizontal state. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0009] Figure 1 A three-dimensional schematic diagram of an electronic device provided in one embodiment of the present application;

[0010] Figure 2 for Figure 1 A schematic diagram of an antenna assembly in an electronic device shown in an embodiment;

[0011] Figure 3 for Figure 2 A schematic diagram of some dimensions of the antenna assembly;

[0012] Figure 4 for Figure 2 Schematic diagram of the electric field at point I;

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

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

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

[0016] Figure 8 is a schematic diagram of a user holding the electronic device with both hands when the electronic device is in another horizontal state;

[0017] Fig. 9 for Figure 2 A schematic diagram of current distribution of a first radiator in an antenna assembly shown in ;

[0018] Fig.10 for Figure 1 A schematic diagram of an antenna assembly in an electronic device shown in another embodiment;

[0019] Fig.11 for Fig.10 A schematic diagram of current distribution of a first radiator in an antenna assembly shown in ;

[0020] Fig.12 for Figure 1 A schematic diagram of an antenna assembly in an electronic device shown in yet another embodiment;

[0021] Fig.13 for Fig.12 A schematic diagram of current distribution of a first radiator in an antenna assembly shown in ;

[0022] Fig.14 for Fig.12 A schematic diagram of the dimensions of the first feeding point of the antenna assembly at the bottom edge;

[0023] Fig.15 A schematic diagram of an antenna assembly provided in another embodiment of the present application;

[0024] Fig.16 is a schematic diagram of an antenna assembly according to another embodiment;

[0025] Fig.17 for Fig.16 A circuit block diagram of the antenna assembly shown in;

[0026] Fig.18 is a schematic diagram of an antenna assembly according to another embodiment;

[0027] Fig.19 for Fig.18 A partial dimension diagram of the antenna assembly shown in ;

[0028] Fig. 20 for Fig.18 The enlarged schematic diagram of II in the middle;

[0029] Fig.21 for Fig. 20 A schematic diagram of current flow in a third radiator of the antenna assembly shown in ;

[0030] Fig. 22is a schematic diagram of a third radiator shown in another embodiment;

[0031] Fig.23 for Fig. 22 Schematic diagram of current distribution of the third radiator;

[0032] Fig.24 for Fig. 22 A schematic diagram showing the distance between the third radiator and other components;

[0033] Fig.25 is a schematic diagram of a third radiator shown in another embodiment;

[0034] Fig.26 is a schematic diagram of current distribution of the third radiator;

[0035] Fig. 27 for Fig.25 A schematic diagram of the dimensions of the bottom edge of the third feeding point of the antenna assembly;

[0036] Fig.28 is a schematic diagram of an antenna assembly according to another embodiment;

[0037] Fig.29 for Fig.28 A circuit block diagram of the antenna assembly shown in;

[0038] Fig.30 is a schematic diagram of an antenna assembly according to another embodiment;

[0039] Fig.31 for Fig.30 A circuit block diagram of the antenna assembly shown in;

[0040] Fig.32 A schematic diagram of S parameters of an antenna assembly in various situations provided in one embodiment of the present application;

[0041] Fig.33 A schematic diagram of the system radiation efficiency and the system total efficiency of the antenna assembly provided in an embodiment of the present application under various conditions.

[0042] Description of main component numbers:

[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 feeding point P1, first free end 312, first end surface 310a, second end surface 310b;

[0045] A second radiator 320, a second feeding point P2, a first RF front-end circuit 350, a first switch 351, a first filter circuit 352, and a first power amplifier circuit 353;

[0046] Controller 360, second feed source S2;

[0047] A third radiator 330, a second ground end 331, a third feeding point P3, a second free end 332, a third end surface 330a, and a fourth end surface 330b;

[0048] A fourth radiator 340, a fourth feeding point P4, a second RF front-end circuit 370, a second switch 371, a second filter circuit 372, and a second power amplifier circuit 373;

[0049] RF front-end circuit 380, switch 381, filter circuit 382, ​​power amplifier circuit 383;

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

[0051] Housing 90 , display screen 70 . DETAILED DESCRIPTION

[0052] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the embodiments described in the present application are only a part of the embodiments, not all of the embodiments. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present application.

[0053] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive, independent, or alternative to other embodiments. It can be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0054] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example: a component or device including one or more parts is not limited to the one or more parts listed, but optionally includes one or more parts that are not listed but inherent to the exemplified product, or one or more parts that it should have based on the described function.

[0055] Please also read Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 1 A three-dimensional schematic 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 an 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 I in the figure. The electronic device 1 can be a device with communication function such as a mobile phone, a tablet computer, etc. In this embodiment, the electronic device 1 is illustrated as a mobile phone. The electronic device 1 includes a floor 10 and an antenna assembly 30. The floor 10 includes a top edge 110, a first side edge 120, a bottom edge 130 and a second side edge 140 that are bent and connected in sequence. The top edge 110 and the bottom edge 130 are both located on the same side of the first side edge 120, and the second side edge 140 is bent and connected to the top edge 110 and the bottom edge 130 respectively, and the second side edge 140 is opposite to the first side edge 120 and is arranged at intervals. 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 arranged adjacent to the first side edge 120. The first radiator 310 has a first grounding terminal 311, a first feeding point P1 and a first free end 312. The first grounding terminal 311 is electrically connected to the floor 10. The first free end 312 is disposed adjacent to the top edge 110 compared to the first ground end 311. The first radiator 310 is electrically connected to the first feed source S1 through 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 face 310a facing away from the bottom edge 130 and a second end face 310b facing away from the second side edge 140. The distance d from the first end face 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 floor 10 may be at least a portion of the middle frame 50 of the electronic device 1, or a ground electrode in a circuit board of the electronic device 1, or a shielding member of a display screen of the electronic device 1. In this embodiment, the floor 10 is taken as a portion of the middle frame 50 of the electronic device 1 for illustration and description.

[0058] The floor 10 is rectangular or substantially rectangular. In the schematic diagram of this embodiment, the floor 10 is rectangular as an example. The top edge 110 and the bottom edge 130 of the floor 10 are two short sides of the floor 10. The first side edge 120 and the second side edge 140 of the floor 10 are two long sides of the floor 10.

[0059] In this embodiment, when the electronic device 1 is in a vertical state, the top edge 110 is usually located at the top of the electronic device 1, so when the electronic device 1 is in a vertical state, the edge of the floor 10 located at the top is called the top edge 110. Correspondingly, when the electronic device 1 is in a vertical state, the bottom edge 130 is usually located at the bottom of the electronic device 1, so when the electronic device 1 is in a vertical state, the edge of the floor 10 located at the bottom is called the bottom edge 130. It can be understood that, as the electronic device 1 is placed in a different posture, 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 perspective of the schematic diagram of this embodiment, the first side 120 is located on the right side and the second side 140 is located on the left side. It is understandable that, as the electronic device 1 is placed in a different posture, the first side 120 may also be located on the left side of the electronic device 1, and the second side 140 may also be located on the right side of the electronic device 1. It is understandable that, as the electronic device 1 is placed in a different posture, for example, the electronic device 1 is in a horizontal state (also called a horizontal placement posture, see Figure 7 ), the top edge 110 may also be located on the left side of the electronic device 1, the bottom edge 130 may also be located on the right side of the electronic device 1, and accordingly, the first side edge 120 may also be located at the bottom of the electronic device 1, and the second side edge 140 may also be located at the top of the electronic device 1. Alternatively, the electronic device 1 is in another horizontal state (also referred to as a horizontal placement posture, see Figure 8 ), the top edge 110 is located on the right side of the electronic device 1, the bottom edge 130 is located on 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 may be a laser direct structuring (LDS) radiator, or a flexible printed circuit (FPC) radiator, or a print direct structuring (PDS) radiator, or a metal branch radiator. When the antenna assembly 30 is applied to the electronic device 1, the first radiator 310 may be a mechanical design antenna (MDA) radiator designed using the metal insert of the electronic device 1 itself. For example, the first radiator 310 may be an antenna radiator designed using the middle frame 50 formed of plastic and metal of the electronic device 1. In addition, the first radiator 310 may also be a radiator of a metal frame antenna designed using a metal middle frame 50.

[0062] It is understandable that the present application does not specifically limit the shape, structure and material of the first radiator 310, and the shapes of the first radiator 310 include but are not limited to bent, straight, L-shaped, sheet-shaped, rod-shaped, coated, thin film, etc. When the first radiator 310 is in a strip shape, the present application does not limit the extension track of the first radiator 310, so the first radiator 310 can be extended in a straight line, a curve, a multi-stage bend, etc. The first radiator 310 can be a line with uniform width on the extension track, or it can be an irregular shape with different widths such as a gradual width and a widened area.

[0063] The first ground terminal 311 is electrically connected to the ground 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 way in which the first ground terminal 311 is electrically connected to the ground may include but is not limited to direct electrical connection (such as welding), or indirect electrical connection to the ground of the electronic device 1 by means of a coaxial line, a microstrip line, a conductive spring, a conductive glue, etc. In one embodiment, when the first radiator 310 can also be a radiator of a metal frame antenna designed for a metal middle frame 50, the first ground terminal 311 and the frame body 510 of the middle frame 50 are an integral 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 this embodiment, the first target frequency band is a middle high frequency band (Middle High Band, MHB) as an example for explanation. It can be understood that in other embodiments, the first target frequency band can be or an ultra high frequency band (Ultra High Band, UHB), etc.

[0064] The first feeding point P1 may be electrically connected to the first feed source S1 by, but is not limited to, being electrically connected to the first feed source S1 by 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 to excite 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 is 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 is 11 'Satisfied: D 11 '≥60mm. The distance d 11 'It can be but is 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'≥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 first radiator 310. 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, because the human body has a high dielectric constant, when the user's finger touches the first radiator 310, the human body is excited by the electric field generated by the first radiator 310 perpendicular to the second end surface 310b and exhibits radiation characteristics, so that the electronic device 1 is in a vertical state and the system radiation efficiency is high when it is held by the user's hand. In this embodiment, the electronic device 1 also includes a middle frame 50, the middle frame 50 includes a frame body 510 and a first frame 520 bent and connected to the frame body 510, the floor 10 includes the frame body 510, the first frame 520 is adjacent to the first side 120, and the first radiator 310 is located in the first frame 520. The example is illustrated. There is a gap between the first radiator 310 and the frame body 510, and the remaining surfaces of the first radiator 310, except for the surface facing the gap, have an electric field perpendicular to the surface. The system radiation efficiency of the electronic device 1 when it is in a vertical state and held by the user's right hand and in a vertical state and held by the user's left hand will be described in detail later in conjunction with the simulation diagram.

[0069] Specifically, see Figure 2 And together Figure 5 and Figure 6 , Figure 5 is a schematic diagram of a left hand holding an electronic device when the electronic device is in a vertical state; Figure 6 is a schematic diagram of a right hand holding an electronic device when the electronic device is in a vertical state. Figure 5 It can be seen that when the electronic device 1 is in a vertical state and the left hand holds the electronic device 1, the first end surface 310a is located above the middle finger of the user, and the middle finger of the user contacts the first radiator 310. Figure 6It can be seen that when the electronic device 1 is in a vertical state and is held in the right hand, the first end surface 310a is located above the thumb of the user, and the thumb of the user contacts the first radiator 310. When the user's finger contacts the first radiator 310, the human body (including the finger) is excited 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 higher when it is in a vertical state and held by the user's hand. It can be understood that in this embodiment, the gap between the first free end 312 and the frame body 510 is named the first gap 521. The first end surface 310a is a surface of the first free end 312 that defines the first gap 521. By Figure 5 It can be seen that when the electronic device 1 is in a vertical state and the left hand holds the electronic device 1, the first gap 521 is located above the middle finger of the user, and the middle finger of the user contacts the first radiator 310. Figure 6 It can be seen that when the electronic device 1 is in the digital state and the user holds the electronic device 1 in the right hand, the first gap 521 is located above the user's thumb, and the user's thumb contacts the first radiator 310 .

[0070] Please also read Figure 7 and Figure 8 , Figure 7 A schematic diagram of a user holding the electronic device with both hands when the electronic device is in a horizontal state; Figure 8 FIG. 1 is a schematic diagram of a user holding the electronic device with both hands when the electronic device is in another horizontal state. Figure 7 In the embodiment, the first side 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; Figure 8 In the embodiment, the first side 120 is located at the top of the electronic device 1, and accordingly, the first radiator 310 is located at the top of the electronic device 1. The distance d 11 Satisfaction:d 11 ≥89mm and the distance d 11 'Satisfied: D 11 '≥60mm, it can be ensured that the first end surface 310a is located between the fingers of the user's right hand and the fingers of the user's left hand. Specifically, according to the holding posture of the user's hand when the electronic device 1 is in the horizontal state (also called the horizontal screen state), in Figure 7 and Figure 8 In the embodiment, the first end surface 310a is located between the pinky finger of the right hand and the pinky finger of the left hand of the user, and the distance from the first gap 521 to the nearest pinky finger is less than λ 1 / 8, therefore, when the electronic device 1 is in a horizontal state, the first radiator 310 is less blocked by the left and right hands of the user, so that the first radiator 310 also has good antenna performance when the antenna assembly 30 is in a horizontal screen state. In this 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 a 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 right hand and the pinky finger of the left hand of the user, and the distance from the first gap 521 to the nearest pinky finger is less than λ 1 / 8, therefore, when the electronic device 1 is in the horizontal state, the first radiator 310 is less blocked by the left and right hands of the user, so that the first radiator 310 also has better antenna performance when the electronic device 1 is in the horizontal state.

[0071] In summary, in 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, the electronic device 1 can be 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 electronic device 1 is in a vertical state and the system radiation efficiency is high when it is 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, so that the first radiator 310 also has good antenna performance when the electronic device 1 is in the horizontal state.

[0072] Please also read Figure 2 , Figure 3 and Fig. 9 , Fig. 9 for Figure 2 Schematic diagram of current distribution of the first radiator in the antenna assembly shown in FIG. Figure 2 In the figure, the dotted line corresponds to the position of the first radiator 310 and identifies 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, which 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 repeated later. The first radiator 310 is taken as having an equivalent length (i.e., electrical length) equal to λ 1 The λ / 4 inverted F-shaped antenna (IFA) antenna radiator is used as an example. 1 is the wavelength corresponding to the center frequency of the first target frequency band, wherein the distance d from the connection between the first ground terminal 311 and the floor 10 to the bottom edge 130 is 12 Satisfy: 30mm≤d 12 ≤75mm.

[0073] In this embodiment, when the first radiator 310 has an equivalent length equal to λ 1 / 4 IFA antenna radiator, 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 works 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, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, 55 mm, 60 mm, 65 mm, 70 mm, or 75 mm.

[0076] The distance d between the connection point between the first grounding end 311 and the floor 10 and the bottom edge 130 is 12 Satisfy: 30mm≤d 12≤75mm, so that when the electronic device 1 is in a vertical state and held by the left hand of the user, the first grounding terminal 311 is located below the middle finger. 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 from the first end surface 310a to the bottom edge 130 is 11 Satisfaction:d 11 ≥89mm, so that the first end surface 310a is located above the middle finger of the left hand; the distance d from the connection between the first grounding end 311 and the floor 10 to the bottom edge 130 12 Satisfy: 30mm≤d 12 ≤75mm, so that the first grounding end 311 can be located below the middle finger; therefore, the middle finger of the user's left hand contacts the first radiator 310, and then the human body (including the middle finger of the left hand) is excited by the electric field perpendicular to the second end surface 310b generated by the first radiator 310 to exhibit radiation characteristics, so that the electronic device 1 is in a vertical state and has a higher system radiation efficiency when held by the user's left hand.

[0077] In addition, the distance d between the connection point between the first grounding end 311 and the floor 10 and the bottom edge 130 is 12 Satisfy: 30mm≤d 12 ≤75mm, so that when the electronic device 1 is in a vertical state and held by the right hand of the user, the first grounding end 311 is located below the thumb. In other words, when the electronic device 1 is in a 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 is 11 Satisfaction: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 between the first grounding end 311 and the floor 10 to the bottom edge 130 12 Satisfy: 30mm≤d 12 ≤75mm, so that the first grounding end 311 can be located below the thumb; therefore, the user's right thumb contacts the first radiator 310, and then the human body (including the right thumb) is excited by the electric field perpendicular to the second end surface 310b generated by the first radiator 310 to exhibit radiation characteristics, so that the electronic device 1 is in a vertical state and has a higher system radiation efficiency when held by the user's right hand.

[0078] Please also read Fig.10 and Fig.11 , Fig.10 for Figure 1 A schematic diagram of an antenna assembly in an electronic device shown in another embodiment; Fig.11 for Fig.10Schematic diagram of current distribution of the first radiator in the antenna assembly shown in FIG. In this embodiment, the first radiator 310 has an equivalent length of 3λ 1 / 4 IFA antenna radiator. 1 is the wavelength corresponding to the center frequency of the first target frequency band, wherein the distance d from the connection between the first ground terminal 311 and the floor 10 to the bottom edge 130 is 12 Satisfy: 30mm≤d 12 ≤75mm.

[0079] In this embodiment, when the first radiator 310 has an equivalent length equal to 3λ 1 / 4 IFA antenna radiator, 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 works in a three-quarter wavelength mode when supporting the first target frequency band.

[0080] The three-quarter wavelength mode is also called a higher-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 and works 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 It can be, but is not limited to, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, 55 mm, 60 mm, 65 mm, 70 mm, or 75 mm.

[0082] The distance d between the connection point between the first grounding end 311 and the floor 10 and the bottom edge 130 is 12 Satisfy: 30mm≤d 12 ≤75mm, so that when the electronic device 1 is in a vertical state and held by the left hand of the user, the first grounding terminal 311 is located below the middle finger. 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 from the first end surface 310a to the bottom edge 130 is 11 Satisfaction:d 11 ≥89mm, so that the first end surface 310a is located above the middle finger of the left hand; the distance d from the connection between the first grounding end 311 and the floor 10 to the bottom edge 130 12 Satisfy: 30mm≤d 12≤75mm, so that the first grounding end 311 can be located below the middle finger; therefore, the middle finger of the user's left hand contacts the first radiator 310, and then the human body (including the middle finger of the left hand) is excited by the electric field perpendicular to the second end surface 310b generated by the first radiator 310 to exhibit radiation characteristics, so that the electronic device 1 is in a vertical state and has a higher system radiation efficiency when held by the user's left hand.

[0083] In addition, the distance d between the connection point between the first grounding end 311 and the floor 10 and the bottom edge 130 is 12 Satisfy: 30mm≤d 12 ≤75mm, so that when the electronic device 1 is in a vertical state and held by the right hand of the user, the first grounding end 311 is located below the thumb. In other words, when the electronic device 1 is in a 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 is 11 Satisfaction: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 between the first grounding end 311 and the floor 10 to the bottom edge 130 12 Satisfy: 30mm≤d 12 ≤75mm, so that the first grounding end 311 can be located below the thumb; therefore, the user's right thumb contacts the first radiator 310, and then the human body (including the right thumb) is excited by the electric field perpendicular to the second end surface 310b generated by the first radiator 310 to exhibit radiation characteristics, so that the electronic device 1 is in a vertical state and has a higher system radiation efficiency when held by the user's right hand.

[0084] Please also read Fig.12 , Fig.13 and Fig.14 , Fig.12 for Figure 1 A schematic diagram of an antenna assembly in an electronic device shown in yet another embodiment; Fig.13 for Fig.12 A schematic diagram of current distribution of a first radiator in an antenna assembly shown in ; Fig.14 for Fig.12 Schematic diagram of the dimensions of the first feeding point of the antenna assembly from the bottom edge. The first radiator 310 is an equivalent length of λ from the first free end 312 to the first feeding point P1. 1 / 4 monopole antenna radiator, the distance d from the first feeding point P1 to the bottom edge 130 13 Satisfy: 30mm≤d 13 ≤75mm.

[0085] In this embodiment, when the first radiator 310 has an equivalent length equal to λ1 / 4 monopole antenna radiator, the resonant current generated by the first excitation signal exciting the first radiator 310 is mainly distributed between the first free end 312 and the first feeding point P1. In other words, some branches between the first free end 312 and the first feeding point P1 of the first radiator 310 support the first target frequency band, and the first radiator 310 works in a quarter-wavelength mode when supporting the first target frequency band.

[0086] The quarter-wavelength mode is also called the fundamental mode. When some branches between the first free end 312 of the first radiator 310 and the first feeding point P1 support 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.

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

[0088] The distance d from the first feeding point P1 to the bottom edge 130 13 Satisfy: 30mm≤d 13 ≤75mm, so that when the electronic device 1 is in a vertical state and held by the left hand of the user, the first feeding point P1 is located below the middle finger. 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 from the first end surface 310a to the bottom edge 130 is 11 Satisfaction:d 11 ≥89mm, so that the first end surface 310a is located above the middle finger of the left hand; the distance d from the first feeding point P1 to the bottom edge 130 13 Satisfy: 30mm≤d 13 ≤75mm, so that the first feeding point P1 can be located below the middle finger; therefore, the middle finger of the user's left hand contacts a part of the branches between the first free end 312 of the first radiator 310 and the first feeding point P1, and then the human body (including the middle finger of the left hand) is excited by the electric field perpendicular to the second end surface 310b generated by the part of the branches between the first free end 312 of the first radiator 310 and the first feeding point P1, and exhibits radiation characteristics, so that the electronic device 1 is in a vertical state and has a higher system radiation efficiency when held by the user's left hand.

[0089] In addition, the distance d from the first feeding point P1 to the bottom edge 130 is 13 Satisfy: 30mm≤d 13≤75mm, so that when the electronic device 1 is in a vertical state and held by the right hand of the user, the first feeding point P1 is located below the thumb. In other words, when the electronic device 1 is in a 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 is 11 Satisfaction: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 first feeding point P1 to the bottom edge 130 13 Satisfy: 30mm≤d 13 ≤75mm, so that the first feeding point P1 can be located below the thumb; therefore, the user's right thumb contacts a portion of the branches between the first free end 312 of the first radiator 310 and the first feeding point P1, and then the human body (including the right thumb) is excited by the electric field perpendicular to the second end surface 310b generated by the first radiator 310 and exhibits radiation characteristics, so that the electronic device 1 is in a vertical state and has a higher system radiation efficiency when held by the user's right hand.

[0090] Please read further Figure 2 , Fig.10 and Fig.12 The electronic device 1 also includes a middle frame 50, the middle frame 50 includes a frame body 510 and a first frame 520 bent and connected to the frame body 510, the floor 10 includes the frame body 510, the first frame 520 is adjacent to the first side 120, and the first radiator 310 is located in the first frame 520.

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

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

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

[0094] In one implementation, the first target frequency band is a middle high frequency band (Middle High Band, MHB). It can be understood that in other implementations, the first target frequency band may be an ultra high frequency band (UHB), etc.

[0095] When the first target frequency band is a medium-high frequency band or an ultra-high frequency band, when the user's hand touches the first radiator 310, it is easier to stimulate the radiation characteristics of the human body, so that the first target frequency band has better radiation efficiency.

[0096] See also Fig.15 , Fig.15 A schematic diagram of an antenna assembly provided for 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 electrically connects the first matching circuit M1 to the first feeding point P1. In one embodiment, the first matching circuit M1 is used to match the output impedance of the first feed source S1 and the input impedance of the first radiator 310. In another embodiment, the first matching circuit M1 is used to adjust the first target frequency band supported by the first radiator 310.

[0097] Please also read Fig.16 and Fig.17 , Fig.16 is a schematic diagram of an antenna assembly according to another embodiment; Fig.17 for Fig.16. In combination with the antenna assembly 30 provided in any of the previous embodiments, the antenna assembly 30 further includes a second radiator 320, a first RF 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 the second radiator 320 has a second feeding point P2. The second radiator 320 receives the first excitation signal through the second feeding point P2, and supports the first target frequency band under the excitation of the first excitation signal. The first RF front-end circuit 350 includes a first switch 351, and 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. 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 the first intensity within the first preset time period, and the attenuation value is greater than or equal to the first threshold, 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 to the first feeding point P1. When the first switch 351 is electrically connected to 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 the 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 disposed adjacent to the top edge 110 for illustration. It can be understood that this should not be construed as a limitation on the embodiments of the present application.

[0099] The second radiator 320 may 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 may be the same as or different from the type of the first radiator 310, which is not limited here.

[0100] When the intensity of the electromagnetic wave signal of the first target frequency band emitted by the second radiator 320 decays within the first preset time period, and the decay value is greater than or equal to the first threshold value, it indicates that the performance of the electromagnetic wave signal of the first target frequency band emitted by the second radiator 320 has dropped sharply. 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, 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 emission 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 in emitting the electromagnetic wave signal of the first target frequency band decreases, 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 enabling the antenna assembly 30 to have better antenna performance in the first target frequency band.

[0101] In addition, in this embodiment, the first RF front-end circuit 350 further includes a first power amplifier circuit 353 and a first filter circuit 352. The first power amplifier circuit 353 is used to amplify the power of the first excitation signal. The first filter circuit 352 is used to filter the first excitation signal after power amplification to filter out other clutters other than the electromagnetic waves supporting the first target frequency band.

[0102] In other embodiments, the first RF front-end circuit 350 may not include the first power amplifier circuit 353 and the first filter circuit 352. It can be understood that in this embodiment, the first feed source S1 and the first RF front-end circuit 350 are two modules for illustration. In other embodiments, the first feed source S1 may also be a module in the first RF front-end circuit 350.

[0103] See also Fig.18 , Fig.19 and Fig. 20 , Fig.18 is a schematic diagram of an antenna assembly according to another embodiment; Fig.19 for Fig.18 A partial dimension diagram of the antenna assembly shown in ; Fig. 20 for Fig.18 The enlarged schematic diagram of II in the figure. Fig.16 and Fig.17The electronic device 1 provided in the embodiment, in this embodiment, the antenna assembly 30 also includes 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 140. The third radiator 330 has a second grounding end 331, a third feeding point P3 and a second free end 332. The second grounding end 331 is electrically connected to the floor 10, and the second free end 332 is arranged adjacent to the top edge 110 compared to the second grounding end 331. The third radiator 330 is electrically connected to the second feed source S2 through the third feeding point P3, and supports the second target frequency band under the excitation of the second excitation signal. Among them, 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 120, and the distance d from the third end face 330a to the bottom edge 130 is 21 Satisfaction:d 21 ≥89mm, the distance d from the third end surface 330a to the top edge 110 21 'Satisfied: 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 Fig. 20 ).

[0104] The distance d from the third end surface 330a to the bottom edge 130 21 Satisfaction:d 21 ≥89mm. The distance d 21 It can be but is not limited to 89mm, 90mm, 91mm, 92mm, 93mm, 94mm, 95mm, etc.

[0105] The distance d from the third end surface 330a to the top edge 110 is 21 'Satisfied: D 21 '≥60mm. The distance d 21 'It can be but is not limited to 60mm, or 61mm, or 62mm, or 63mm, or 64mm, or 65mm, etc.

[0106] The distance d 21 Satisfaction:d 21 ≥89mm and the distance d 21 'Satisfied: 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 generated by the first radiator 310 that is perpendicular to the fourth end face 330b 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 Fig.19 , Fig. 20 and Fig.21 , Fig.21 for Fig. 20 The equivalent length of the third radiator 330 is equal to λ 2 / 4 IFA antenna radiator, wherein the λ 2 is the wavelength corresponding to the center frequency of the second target frequency band, wherein the distance d from the connection between the second grounding end 331 and the floor 10 to the bottom edge 130 is 22 Satisfy: 30mm≤d 22 ≤75mm.

[0108] In this embodiment, when the third radiator 330 has an equivalent length equal to λ 2 / 4 IFA antenna radiator, the first excitation signal excites the third radiator 330 to generate a resonant current 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 works 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, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, 55 mm, 60 mm, 65 mm, 70 mm, or 75 mm.

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

[0112] In addition, the distance d between the connection point between the second grounding end 331 and the floor 10 and the bottom edge 130 is 22 Satisfy: 30mm≤d 22 ≤75mm, so that when the electronic device 1 is in a vertical state and held by the right hand of the user, the second grounding end 331 is located below the thumb. In other words, when the electronic device 1 is in a vertical state and held by the right hand of the user: the distance d from the third end surface 330a to the bottom edge 130 is 21 Satisfaction:d 21 ≥89mm, so that the third end surface 330a is located above the middle finger of the right hand; the distance d from the connection between the second grounding end 331 and the floor 10 to the bottom edge 130 22 Satisfy: 30mm≤d 22 ≤75mm, so that the second grounding end 331 is located below the thumb; therefore, the user's right thumb touches the third radiator 330, and then the human body (including the right thumb) is excited by the electric field perpendicular to the fourth end face 330b generated by the third radiator 330 to exhibit radiation characteristics, so that the electronic device 1 is in a vertical state and has a higher system radiation efficiency when held by the user's right hand.

[0113] Please also read Fig. 22 , Fig.23 and Fig.24 , Fig. 22 is a schematic diagram of a third radiator shown in another embodiment; Fig.23 for Fig. 22 Schematic diagram of current distribution of the third radiator; Fig.24 for Fig. 22 The third radiator 330 has an equivalent length of 3λ. 2 / 4 IFA antenna radiator, wherein the λ 2 is the wavelength corresponding to the center frequency of the second target frequency band, wherein the distance d from the connection between the second grounding end 331 and the floor 10 to the bottom edge 130 is 22 Satisfy: 30mm≤d 22 ≤75mm.

[0114] In this embodiment, when the third radiator 330 has an equivalent length equal to 3λ 2 / 4 IFA antenna radiator, the first excitation signal excites the third radiator 330 to generate a resonant current 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 works in a three-quarter wavelength mode when supporting the second target frequency band.

[0115] The three-quarter wavelength mode is also called a higher-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 and 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 It can be, but is not limited to, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, 55 mm, 60 mm, 65 mm, 70 mm, or 75 mm.

[0117] The distance d from the connection between the second grounding end 331 and the floor 10 to the bottom edge 130 is the distance d from the connection between the second grounding end 331 and the floor 10 to the bottom edge 130. 22 Satisfy: 30mm≤d 22 ≤75mm, so that when the electronic device 1 is in a vertical state and held by the left hand of the user, the second grounding terminal 331 is located below the middle finger. 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 from the third end surface 330a to the bottom edge 130 is 21 Satisfaction:d 21≥89mm, so that the third end surface 330a is located above the middle finger of the left hand; the distance d from the connection between the second grounding end 331 and the floor 10 to the bottom edge 130 is 22 Satisfy: 30mm≤d 22 ≤75mm, so that the second grounding end 331 is located below the middle finger; therefore, the middle finger of the user's left hand contacts the third radiator 330, and then the human body (including the middle finger of the left hand) is excited by the electric field perpendicular to the fourth end surface 330b generated by the third radiator 330 and exhibits radiation characteristics, so that the electronic device 1 is in a vertical state and has a higher system radiation efficiency when held in the user's left hand.

[0118] In addition, the distance d between the connection point between the second grounding end 331 and the floor 10 and the bottom edge 130 is 22 Satisfy: 30mm≤d 22 ≤75mm, so that when the electronic device 1 is in a vertical state and held by the right hand of the user, the second grounding end 331 is located below the thumb. In other words, when the electronic device 1 is in a vertical state and held by the right hand of the user: the distance d from the third end surface 330a to the bottom edge 130 is 21 Satisfaction:d 21 ≥89mm, so that the third end surface 330a is located above the middle finger of the right hand; the distance d from the connection between the second grounding end 331 and the floor 10 to the bottom edge 130 22 Satisfy: 30mm≤d 22 ≤75mm, so that the second grounding end 331 is located below the thumb; therefore, the user's right thumb touches the third radiator 330, and then the human body (including the right thumb) is excited by the electric field perpendicular to the fourth end face 330b generated by the third radiator 330 to exhibit radiation characteristics, so that the electronic device 1 is in a vertical state and has a higher system radiation efficiency when held by the user's right hand.

[0119] Please refer to Fig.25 , Fig.26 and Fig. 27 , Fig.25 is a schematic diagram of a third radiator shown in another embodiment; Fig.26 is a schematic diagram of current distribution of the third radiator; Fig. 27 for Fig.25 The third radiator 330 is a schematic diagram of the dimensions from the third feeding point of the antenna assembly to the bottom edge. The equivalent length of the third radiator 330 from the second free end 332 to the third feeding point P3 is λ 2 / 4 monopole antenna radiator, the distance d from the third feeding point P3 to the bottom edge 130 23Satisfy: 30mm≤d 23 ≤75mm.

[0120] In this embodiment, when the third radiator 330 has an equivalent length equal to λ 2 / 4 monopole antenna radiator, the resonant current generated by the second excitation signal exciting the third radiator 330 is mainly distributed between the second free end 332 and the third feeding point P3. In other words, some branches between the second free end 332 and the third feeding point P3 of the third radiator 330 support the second target frequency band, and the third radiator 330 works in a quarter-wavelength mode when supporting the second target frequency band.

[0121] The quarter-wavelength mode is also called the fundamental mode. When some branches between the second free end 332 of the third radiator 330 and the third feeding point P3 support 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.

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

[0123] The distance dd from the third feeding point P3 to the bottom edge 130 23 Satisfy: 30mm≤d 23 ≤75mm, so that when the electronic device 1 is in a vertical state and held by the left hand of the user, the third feeding point P3 is located below the middle finger. 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 from the third end surface 330a to the bottom edge 130 is 21 Satisfaction:d 21 ≥89mm, so that the third end surface 330a is located above the middle finger of the left hand; the distance d from the third feeding point P3 to the bottom edge 130 23 Satisfy: 30mm≤d 23 ≤75mm, so that the third feeding point P3 can be located below the middle finger; therefore, the middle finger of the user's left hand contacts a part of the branches between the second free end 332 of the third radiator 330 and the third feeding point P3, and then the human body (including the middle finger of the left hand) is excited by the electric field perpendicular to the fourth end face 330b generated by the part of the branches between the second free end 332 of the third radiator 330 and the third feeding point P3, and exhibits radiation characteristics, so that the electronic device 1 is in a vertical state and has a higher system radiation efficiency when held by the user's left hand.

[0124] In addition, the distance d from the third feeding point P3 to the bottom edge 130 is 23 Satisfy: 30mm≤d 23 ≤75mm, so that when the electronic device 1 is in a vertical state and held by the right hand of the user, the third feeding point P3 is located below the thumb. In other words, when the electronic device 1 is in a vertical state and held by the right hand of the user: the distance d from the third end surface 330a to the bottom edge 130 is 11 Satisfaction:d 11 ≥89mm, so that the third end surface 330a is located above the middle finger of the right hand; the distance d from the third feeding point P3 to the bottom edge 130 is 23 Satisfy: 30mm≤d 23 ≤75mm, so that the third feeding point P3 can be located below the thumb; therefore, the user's right thumb contacts a portion of the branches 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 perpendicular to the fourth end face 330b generated by the third radiator 330 and exhibits radiation characteristics, so that the electronic device 1 is in a vertical state and has a higher system radiation efficiency when held by the user's right hand.

[0125] Please read further Fig.18 , Fig. 22 and Fig.25 The electronic device 1 also includes a middle frame 50, the middle frame 50 includes a frame body 510 and a second frame 530 bent and connected to the frame body 510, the second frame 530 is adjacent to the second side 140, and the third radiator 330 is located in the second frame 530.

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

[0127] In one embodiment, the third slit 531 is flush with the first slit 521. In other embodiments, the third slit 531 is offset from the first slit 521. In this embodiment, the relative position relationship between the third slit 531 and the first slit 521 is not limited too much.

[0128] Please also read Fig.28and Fig.29 , Fig.28 is a schematic diagram of an antenna assembly according to another embodiment; Fig.29 for Fig.28 The circuit block diagram of the antenna assembly shown in . Combined with the above-mentioned manner that the antenna assembly 30 includes a first radiator 310, a second radiator 320, a third radiator 330, a first feed source S1 and a second feed source S2, in this embodiment, the antenna assembly 30 also includes a fourth radiator 340 and a second RF front-end circuit 370. The fourth radiator 340 is adjacent to the other of the top edge 110 and the bottom edge 130. The fourth radiator 340 has a fourth feeding point P4, and the fourth radiator 340 receives the second excitation signal through the fourth feeding point P4, and supports the second target frequency band under the excitation of the second excitation signal. The second RF front-end circuit 370 includes a second switch 371, and 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. 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 attenuation value is greater than or equal to a second threshold, the controller 360 controls the second switch 371 to disconnect the electrical connection with 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 this embodiment, the second radiator 320 is disposed adjacent to the edge, and the fourth radiator 340 is disposed adjacent to the bottom edge 130. In other embodiments, the second radiator 320 may be disposed adjacent to the bottom edge 130, and the fourth radiator 340 may be disposed adjacent to the top edge 110.

[0130] The fourth radiator 340 may 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 may be the same as or different from the type of the third radiator 330, which is not limited here.

[0131] When the intensity of the electromagnetic wave signal of the second target frequency band emitted by the fourth radiator 340 decays within the second preset time period, and the attenuation value is greater than or equal to the second threshold value, it indicates that the performance of the electromagnetic wave signal of the second target frequency band emitted by the fourth radiator 340 has dropped sharply. 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 to the third feeding point P3, then the controller 360 controls the second switch 371 to be electrically disconnected from the fourth feeding point P4. That is, the controller 360 switches the emission 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 in 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, so that the antenna assembly 30 has better antenna performance in the second target frequency band.

[0132] In addition, in this embodiment (see Fig.29 ), the first RF front-end circuit 350 further includes a first power amplifier circuit 353 and a first filter circuit 352. The first power amplifier circuit 353 is used to amplify the power of the first excitation signal. The first filter circuit 352 is used to filter the first excitation signal after power amplification to filter out other clutters other than the electromagnetic waves supporting the first target frequency band.

[0133] In other implementations, the first RF front-end circuit 350 may not include the first power amplifier circuit 353 and the first filter circuit 352 .

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

[0135] In addition, in this embodiment (see Fig.29 ), the second RF front-end circuit 370 further includes a second power amplifier circuit 373 and a second filter circuit 372. The second power amplifier circuit 373 is used to amplify the power of the first excitation signal. The second filter circuit 372 is used to filter the first excitation signal after power amplification to filter out other clutters other than the electromagnetic waves supporting the first target frequency band.

[0136] In other implementations, the second RF front-end circuit 370 may not include the second power amplifier circuit 373 and the second filter circuit 372 .

[0137] It can be understood that in this embodiment, the second feed source S2 and the second RF front-end circuit 370 are taken as two modules for illustration. In other embodiments, the second feed source S2 can also be a module in the second RF front-end circuit 370.

[0138] In one implementation, 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, can meet the communication antenna performance requirements of the antenna assembly 30 in the MHB frequency band, and can be adapted to the communication application scenarios of the electronic device 1 in the MHB frequency band.

[0140] See also Fig.30 and Fig.31 , Fig.30 is a schematic diagram of an antenna assembly according to another embodiment; Fig.31 for Fig.30The circuit block diagram of the antenna assembly shown in . This embodiment can be combined with the embodiment of the antenna assembly 30 described above in which the antenna assembly 30 includes a first radiator 310 and a second radiator 320. The floor 10 also includes a second side 140, and the second side 140 is bent and connected to the top side 110 and the bottom side 130 respectively, and the second side 140 is opposite to the first side 120 and is arranged at intervals. The antenna assembly 30 also includes 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 the third radiator 330 has a second ground terminal 331, a third feeding point P3, and a second free end 332, wherein the second ground terminal 331 is electrically connected to the floor 10, and the second free end 332 is disposed adjacent to the top edge 110 compared to the second ground terminal 331, and the third radiator 330 receives the first excitation signal through the third feeding point P3, and supports the first target frequency band under the excitation of the first excitation signal. The fourth radiator 340 is adjacent to the other of the top edge 110 and the bottom edge 130, and the fourth radiator 340 has a fourth feeding point P4, and receives the first excitation signal through the fourth feeding point P4, and supports the first target frequency band under the excitation of the first excitation signal. The RF front-end circuit 380 includes 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 the fifth intensity within the third preset time period, and the decay value is greater than or equal to the third threshold, the controller 360 controls the switch 381 to disconnect the electrical connection with the currently working one, and electrically connect to the other one of the first radiator 310, the second radiator 320, the third radiator 330 and the fourth radiator 340, wherein the intensity of the electromagnetic wave signal of the first target frequency band emitted by the other one is the sixth intensity, wherein the sixth intensity is greater than the fifth intensity.

[0141] When one of the first radiator 310, the second radiator 320, the third radiator 330 and the fourth radiator 340 currently working attenuates within the third preset time, and the attenuation value is greater than or equal to the third threshold value, it indicates that the performance of the one transmitting the electromagnetic wave signal of the first target frequency band has dropped sharply. The controller 360 controls the switch 381 to be electrically connected to the other 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 performance of the one transmitting the electromagnetic wave signal of the first target frequency band drops, the controller 360 can control the switch 381 to be electrically connected to the other, so that the antenna assembly has better antenna performance in the first target frequency band.

[0142] In this embodiment, the switching of the radiators of the first target frequency band supported by the four antenna radiators can be achieved through one RF front-end circuit 380 .

[0143] In this embodiment, the RF front-end circuit 380 further includes a power amplifier circuit 383 and a filter circuit 382. The power amplifier circuit 383 is used to amplify the power of the first excitation signal. The filter circuit 382 is used to filter the first excitation signal after power amplification to filter out other clutters other than the electromagnetic waves supporting the first target frequency band.

[0144] In other implementations, the RF front-end circuit 380 may not include the power amplifier circuit 383 and the filter circuit 382 .

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

[0146] It is understandable that, in one embodiment, the antenna assembly 30 further includes a second matching circuit, which is connected in series in the path from the first feed source S1 to the second feed point P2. It is understandable that, in other embodiments, the antenna assembly 30 further includes a third matching circuit, and the second feed source 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 from the second feed source S1 to the fourth feed point P4.

[0147] Next, the performance of the antenna assembly 30 provided in one embodiment of the present application is simulated.

[0148] See also Fig.32 , Fig.32 Schematic diagram of the S parameters of the antenna assembly provided in various situations for one embodiment of the present application. In this schematic diagram, the horizontal axis is frequency (Frequency), the unit is GHz; the vertical axis is S parameter (SParameter), the unit is dB. In this simulation diagram, the antenna assembly 30 provided by an embodiment of the antenna assembly 30 is taken as an example and the first target frequency band is the B3 frequency band (1.71GHz~1.88GHz) for simulation. Among them, curve ① is the S1,1 curve of the antenna assembly 30 when the electronic device 1 is in a horizontal state (also called a horizontal screen state) and is held with both hands, and is marked as S1,1 horizontal holding with both hands in the figure. Curve ② is the S1,1 curve of the antenna assembly 30 when the electronic device 1 is in a vertical state (also called a vertical screen state) and is held with the right hand, and is marked as S1,1 vertical holding with the right hand in the figure. Curve ③ is the S1,1 curve of the antenna assembly 30 when the electronic device 1 is in free space, and is marked as S1,1 free space in the figure. Curve ④ is the S1,1 curve of the antenna assembly 30 when the electronic device 1 is in a vertical state (also called a vertical screen state) and is held by the left hand, which is marked as S1,1 left hand vertical holding in the figure. It can be seen from this simulation diagram that the reflection coefficient S1,1 becomes better after being held by the user's hand, which is mainly due to the participation of the hand in radiation and loss. In addition, when the electronic device 1 is in a vertical state and held by the left hand and the electronic device 1 is in a vertical state and held by the right hand, the lowest point of the reflection coefficient S1,1 curve shifts to a low frequency, which is mainly caused by the hand as a medium with a high dielectric constant.

[0149] See also Fig.33 , Fig.33Schematic diagram of the system radiation efficiency and system total efficiency of the antenna assembly provided in one embodiment of the present application under various conditions. In this schematic diagram, the horizontal axis is frequency (Frequency), the unit is GHz; the vertical axis is efficiency, the unit is dB. In this simulation diagram, the antenna assembly 30 provided in one embodiment is taken as an example and the first target frequency band is the B3 frequency band (1.71GHz~1.88GHz) for simulation. Among them, curve ① is a system radiation efficiency (SystemRad.Efficiency) curve of the antenna assembly 30 when the electronic device 1 is in a horizontal state and held with both hands (referred to as horizontal holding with both hands); curve ② is a system radiation efficiency (System Rad.Efficiency) curve when the electronic device 1 is in a vertical state and held with the right hand (referred to as vertical holding with the right hand); curve ③ is a system radiation efficiency curve when the electronic device 1 is in a free space; curve ④ is a system radiation efficiency curve when the electronic device 1 is in a vertical state and held with the left hand; curve ⑤ is a system total efficiency (System Total Efficiency) curve of the antenna assembly 30 when the electronic device 1 is in a horizontal state and held with both hands (referred to as horizontal holding with both hands); curve ⑥ is a system total efficiency (System Total Efficiency) curve when the electronic device 1 is in a vertical state and held with the right hand (referred to as vertical holding with the right hand); curve ⑦ is a system total efficiency (System Total Efficiency) curve when the electronic device 1 is in a free space; curve ⑧ is a system total efficiency (System Total Efficiency) curve when the electronic device 1 is in a vertical state and held with the left hand. It can be seen from the simulation diagram that the average system radiation efficiency (also called average radiation efficiency) of the antenna assembly 30 in free space is -5.7dB, and the average system total efficiency (also called system efficiency) is -7.7dB. When the right hand is held vertically: the average system radiation efficiency is -3.7dB, the average system total efficiency is -4.5dB, and the system total efficiency is nearly 3.2dB higher than the system total efficiency in free space. When the left hand is held vertically: the average radiation efficiency is -4.8dB, the system efficiency is -6dB, and the system efficiency is nearly 3.2dB higher than the system efficiency in free space. When both hands are held horizontally: the average radiation efficiency is -7.1dB, the system efficiency is -8.5dB, and the system efficiency is 0.8dB worse than that in free space. This is mainly because when the hands are lying horizontally, the electric field that excites the little finger is small; in addition, after adding both hands, the loss of the hand that is not excited by the electric field increases.

[0150] In summary, the antenna assembly 30 in the electronic device 1 provided in an embodiment of the present application is based on the scenario of the user holding the right hand vertically, holding the left hand vertically, and holding both hands horizontally, and the position, gap and return point (i.e., the grounding point of the grounding terminal) of the radiator working at a frequency greater than or equal to 1GHz is limited, so that the vertical holding (right hand vertical holding, left hand vertical holding) scenario can achieve better antenna performance than free space, such as space download technology (Over-the-Air Technology, OTA) performance. Especially under the trend of full-screen development of electronic devices 1, under the extreme clearance of the small clearance of electronic devices 1, the antenna assembly 30 provided in the embodiment of the present application can significantly improve the performance of the antenna, at least 1.7dB. In addition, according to the characteristics of holding the right hand vertically, holding the left hand vertically, and holding both hands horizontally, the position of the first radiator 310 is determined to take into account the use scenarios of holding the right hand vertically, holding the left hand vertically, and holding both hands horizontally. When the antenna assembly 30 also includes a third radiator 330, the position of the third radiator 330 is also determined to take into account the use scenarios of holding the right hand vertically, holding the left hand vertically, and holding both hands horizontally. The antenna performance OTA of the antenna assembly 30 when the two hands are held horizontally is reduced less than that of the free space (only reduced by 0.8 dB). Therefore, the antenna assembly 30 provided in the embodiment of the present application can take into account the antenna performance OTA when the right hand is held vertically, the left hand is held vertically, and the two hands are held horizontally, so that the user has a better experience when using the electronic device 1.

[0151] As can be seen from the above description, the first radiator 310 includes three implementation modes: the first implementation mode is that the first radiator 310 has an equivalent length (ie, electrical length) equal to λ 1 / 4 IFA antenna radiator; the second embodiment is that the first radiator 310 has an equivalent length of 3λ 1 / 4 IFA antenna radiator; the third embodiment is that the first radiator 310 is the first free end 312 to the first feeding point P1 equivalent length is λ 1 / 4 monopole antenna radiator. In one embodiment, for vertical holding scenarios (including right-hand vertical holding and left-hand vertical holding), the first radiator 310 based on the three embodiments described above is lower than the first radiator 310 of the first embodiment, the second embodiment and the third embodiment: the position of the first slit 521 (i.e., the first end surface 310a) of the first radiator 310 is required to be higher than the middle finger in the left-hand vertical holding scenario, and the position of the first slit 521 (i.e., the first end surface 310a) of the first radiator 310 is required 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 point (i.e., the return point) of the first grounding end 311 of the first radiator 310 and the floor 10 in the left-hand vertical holding scenario is lower than the contact position of the middle finger and the first radiator 310, and the connection point (i.e., the return point) of the first grounding end 311 of the first radiator 310 and the floor 10 in the right-hand vertical holding scenario is lower than the contact position of the thumb and the first radiator 310. For the third embodiment, in the left hand vertical holding scenario, 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 right hand vertical holding scenario, the position of the feeding point of the first radiator 310 is lower than the position where the thumb contacts the first radiator 310.

[0152] In addition, based on the above conditions in the left-hand vertical holding scenario and the right-hand vertical holding scenario, in one embodiment, it is also necessary to satisfy that the distance between the first end surface 310a of the first radiator 310 (i.e., the first gap 521) and the nearest little finger is less than λ 1 / 8, in addition, the first end surface 310a (i.e., the first gap 521) should also be located between the two little fingers.

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

[0154] In one embodiment, the first RF front-end circuit 350 can be used to switch the first radiator 310 and the second radiator 320 supporting the first target frequency band, and the second RF front-end circuit 370 can be used to switch the third radiator 330 and the fourth radiator 340 supporting the second target frequency band. That is, two RF front-end circuits are used to switch the two pairs of antenna radiators.

[0155] In other implementations, one RF front-end circuit may be used to implement switching of four antenna radiators.

[0156] It should be noted that, in one embodiment, the electronic device 1 further includes 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 horizontal state (or a horizontal screen state), and the USB port is located on the right side of the electronic device 1, at this time, it is also referred to as a horizontal state with the USB port facing right, or a horizontal screen state with the USB port facing right. When the electronic device 1 is in a horizontal state (or a horizontal screen state), and the USB port is located on the left side of the electronic device 1, at this time, it is also referred to as a horizontal state with the USB port facing left, or a horizontal screen state with the USB port facing left.

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

[0158] The above are some implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. An electronic device, characterized in that: The electronic device comprises a floor and an antenna assembly, wherein the floor comprises a top edge, a first side edge, a bottom edge and a second side edge which are bent and connected in sequence, wherein the top edge and the bottom edge are both located on the same side of the first side edge, and the second side edge is bent and connected to the top edge and the bottom edge respectively, and the second side edge is opposite to the first side edge and is arranged at intervals; the antenna assembly comprises: A first feed source, providing a first excitation signal; and a first radiator, disposed adjacent to the first side edge, the first radiator having a first ground end, a first feeding point, and a first free end, the first ground end being electrically connected to the floor, the first free end being disposed 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 feeding point, and supporting a first target frequency band under the excitation of the first excitation signal; The first free end has a first end surface away from the bottom edge and a second end surface away from the second side edge, and the distance d from the first end surface to the bottom edge is 11 Satisfaction:d 11 ≥89mm, the distance d from the first end surface to the top edge 11 'Satisfied: 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.

2. The electronic device according to claim 1, wherein: The first radiator is an IFA antenna radiator with an equivalent length equal to λ1 / 4, wherein λ1 is the wavelength corresponding to the center frequency of the first target frequency band, wherein the distance d from the connection between the first ground end and the floor to the bottom edge is 12 Satisfy: 30mm≤d 12 ≤75mm; or, The first radiator is an IFA antenna radiator with an equivalent length of 3λ1 / 4, wherein λ1 is the wavelength corresponding to the center frequency of the first target frequency band, wherein the distance d from the connection between the first ground end and the floor to the bottom edge is 12 Satisfy: 30mm≤d 12 ≤75mm.

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

4. The electronic device according to claim 1, wherein: The electronic device further includes a middle frame, which includes a frame body and a first frame bent and connected to the frame body. The floor includes the frame body, the first frame is adjacent to the first side, and the first radiator is located at the first frame.

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

6. The electronic device according to any one of claims 1 to 5, characterized in that: The antenna assembly further comprises: a second radiator, the second radiator being adjacent to one of the top edge and the bottom edge, the second radiator having a second feeding point, the second radiator receiving the first excitation signal through the second feeding point, and supporting the first target frequency band under the excitation of the first excitation signal; a first RF front-end circuit, the first RF front-end circuit comprising a first switch, the first feed source being electrically connected to one of the first feed point and the second feed point through the first switch; and Controller; When the first feed source is electrically connected to the second feeding point through the first switch, and the intensity of the electromagnetic wave signal in the first target frequency band emitted by the second radiator decays to a first intensity within a first preset time period, and the attenuation value is greater than or equal to a first threshold, the controller controls the first switch to disconnect the electrical connection with the second feeding point, and controls the first switch to be electrically connected to the first feeding point; when the first switch is electrically connected to the first feeding point, the intensity of the electromagnetic wave signal in 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 according to claim 6, characterized in that: The antenna assembly further comprises: A second feed source provides a second excitation signal; and 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 compared to the second ground end, the third radiator being electrically connected to the second feed source through the third feeding point, and supporting a second target frequency band under the excitation of the second excitation signal; The third radiator has a third end face away from the bottom edge and a fourth end face away from the first side edge, and the distance d from the third end face to the bottom edge is 21 Satisfaction:d 21 ≥89mm, the distance d from the third end surface to the top edge 21 'Satisfied: D 21 '≥60mm; 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 according to claim 7, wherein the equivalent length of the third radiator is equal to the IFA antenna radiator of λ2 / 4, wherein: The 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 end and the floor to the bottom edge is 22 Satisfy: 30mm≤d 22 ≤75mm; or, The third radiator is an IFA antenna radiator with an equivalent length of 3λ2 / 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 end and the floor to the bottom edge is 22 Satisfy: 30mm≤d 22 ≤75mm.

9. The electronic device according to claim 8, characterized in that: The third radiator is a monopole antenna radiator with an equivalent length from the second free end to the third feeding point of λ2 / 4, and a distance d from the third feeding point to the bottom edge of 23 Satisfy: 30mm≤d 23 ≤75mm.

10. The electronic device according to claim 7, characterized in that: 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 at the second frame.

11. The electronic device according to claim 7, characterized in that: The antenna assembly further comprises: a fourth radiator, adjacent to the other of the top edge and the bottom edge, the fourth radiator having a fourth feeding point, the fourth radiator 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 decays 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 according to claim 11, characterized in that: 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 according to claim 7, characterized in that: The antenna assembly further comprises: 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 compared 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 the excitation of the first excitation signal; a fourth radiator, adjacent to the other of the top edge and the bottom edge, the fourth radiator having a fourth feeding point, the fourth radiator 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 through 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 value, 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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