Foldable electronic device

Abstract

The invention provides a foldable electronic device. The foldable electronic equipment comprises a foldable main body and an antenna assembly, wherein the foldable main body comprises a first main body and a second main body which are foldable and are in conductive connection, so that the foldable electronic equipment is in a folded state and an unfolded state; the antenna assembly comprises a first radiator and a second radiator. The first radiating body is arranged on the first main body, the first radiating body is provided with a grounded first grounding end, a first feeding point and a first free end, and the first feeding point receives a first excitation signal; the second radiator is arranged on the second main body, and the second radiator is provided with a second grounding end which is grounded and a second free end; when the foldable electronic equipment is in a folded state, the first excitation signal excites the first main body through the first radiator to generate a first current, the second radiator excites the second main body to generate a second current, the direction of the second current is the same as that of the first current, and the first current and the second current are both used for supporting a target frequency band.

Description

Technical Field

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

[0002] Electronic devices that can be unfolded and folded have attracted more and more attention because they have a large display screen when unfolded and occupy a small space and are easy to carry when folded. However, the performance of some antennas of electronic devices deteriorates seriously after being folded, which affects the user experience. Therefore, how to improve the antenna performance of foldable electronic devices when folded has become a technical problem that needs to be solved. Summary of the invention

[0003] In a first aspect, the present application provides a foldable electronic device. The foldable electronic device comprises a foldable body and an antenna assembly, wherein the foldable body comprises a first body and a second body that are foldable and conductively connected, so that the foldable electronic device is in a folded state and an unfolded state; the antenna assembly comprises:

[0004] A first radiator, the first radiator is disposed on the first body, the first radiator has a first grounding end, a first feeding point and a first free end, the first grounding end is grounded, and the first feeding point is used to receive a first excitation signal; and

[0005] A second radiator, the second radiator is disposed on the second body, the second radiator has a second grounding end and a second free end, and the second grounding end is grounded;

[0006] When the foldable electronic device is in a folded state: the first excitation signal excites the first body to generate a first current through the first radiator, and the second radiator excites the second body to generate a second current, wherein the direction of the second current is the same as the direction of the first current, and the first current and the second current are both used to support the target frequency band.

[0007] In the antenna assembly of the foldable electronic device provided in this embodiment, since the antenna assembly includes not only the first radiator but also the second radiator, when the foldable electronic device is in a folded state, the first radiator can excite the first current of the first body, and the second radiator can also excite the second current of the second body, and the first current and the second current both support the target frequency band. It can be seen that the antenna assembly of the foldable electronic device provided in the embodiment of the present application excites the second body to generate the second current through the second radiator, so when the foldable electronic device is in a folded state, the radiation efficiency of the antenna assembly when supporting the target frequency band is high. 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 paying creative work.

[0009] Figure 1 A schematic diagram of the structure of a foldable electronic device in an unfolded state provided by one embodiment of the present application;

[0010] Figure 2 for Figure 1 A schematic diagram of a foldable electronic device in a folded state as shown in ;

[0011] Figure 3 An implementation method provided Figure 1 A schematic diagram of a partial structure of a foldable electronic device;

[0012] Figure 4 An implementation method provided Figure 2 A schematic diagram of a partial structure of a foldable electronic device shown in;

[0013] Figure 5 A schematic diagram showing the dimensions of some components of an antenna assembly in a foldable electronic device provided in one embodiment;

[0014] Figure 6 A schematic diagram showing the dimensions of some components of an antenna assembly in a foldable electronic device provided in one embodiment;

[0015] Figure 7 A schematic diagram of a user holding a foldable electronic device in his right hand;

[0016] Figure 8 A schematic diagram of a user holding a foldable electronic device in his left hand;

[0017] Fig. 9 A schematic structural diagram of a foldable electronic device in an unfolded state provided by another embodiment of the present application;

[0018] Fig.10 for Fig. 9 A schematic diagram of a foldable electronic device in a folded state as shown in ;

[0019] Fig.11 An implementation method provided Fig. 9 A schematic diagram of a partial structure of a foldable electronic device;

[0020] Fig.12 An implementation method provided Fig.10A schematic diagram of the flow directions of the first current and the second current in the antenna assembly of the foldable electronic device shown in ;

[0021] Fig.13 A schematic diagram of an antenna assembly in a foldable electronic device provided in another embodiment of the present application;

[0022] Fig.14 For an implementation shown Fig.13 A schematic diagram of an antenna assembly of a foldable electronic device;

[0023] Fig.15 Another embodiment is shown Fig.13 A schematic diagram of an antenna assembly of a foldable electronic device;

[0024] Fig.16 A schematic diagram of electric fields of a first radiator and a second radiator of a foldable electronic device in a folded state provided by an embodiment;

[0025] Fig.17 for Fig.16 The enlarged schematic diagram of point I in the middle;

[0026] Fig.18 An implementation method provided Figure 3 A schematic diagram of a partial structure of a foldable electronic device;

[0027] Fig.19 A schematic diagram of an S parameter curve of an antenna assembly when a foldable electronic device is in a folded state provided by the related art and a schematic diagram of a parameter curve of an antenna assembly when a foldable electronic device is in a folded state provided by an embodiment of the present application;

[0028] Fig. 20 A schematic diagram of the system efficiency of a foldable electronic device in a folded state provided by the related art and a schematic diagram of the system efficiency of a foldable electronic device in a folded state provided by an embodiment of the present application.

[0029] Description of main component numbers:

[0030] A foldable electronic device 1, a foldable body 10, a first body 11, a connecting member 12, and a second body 13;

[0031] A first side edge 111, a first bottom edge 112, a first top edge 113, and a first connecting edge 114;

[0032] A second side edge 131, a second bottom edge 132, a second top edge 133, and a second connecting edge 134;

[0033] Antenna assembly 20, first radiator 21, second radiator 22, first matching branch 23, first transmission line 231, second matching branch 24, second transmission line 241, feed source S, first matching circuit M1, second matching circuit M2, third matching circuit M3, first switch network SW1, second switch network SW2;

[0034] A first grounding end 211, a first free end 212, a first feeding point P1, a first end surface 21a, and a first opening direction;

[0035] A second grounding end 221, a second free end 222, a second feeding point P2, a second end surface 22a, and a second opening direction;

[0036] Display screen 30, housing 40;

[0037] The first middle frame 50 , the first side frame 52 , the second middle frame 60 , the second side frame 62 , the first gap 521 , the second gap 522 , the third gap 621 , and the fourth gap 622 . DETAILED DESCRIPTION

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

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

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

[0041] Please also read Figures 1 to 4 , Figure 1A schematic diagram of the structure of a foldable electronic device in an unfolded state provided by one embodiment of the present application; Figure 2 for Figure 1 A schematic diagram of a foldable electronic device in a folded state as shown in ; Figure 3 An implementation method provided Figure 1 A schematic diagram of a partial structure of a foldable electronic device; Figure 4 An implementation method provided Figure 2 The foldable electronic device 1 is a partial structural diagram of the foldable electronic device shown in FIG. Figure 3 FIG. 1 is a schematic diagram showing only a part of the structure of the foldable electronic device 1. Figure 3 Compared to Figure 1 The display screen 30 and the housing 40 are omitted. The present application provides a foldable foldable electronic device 1, which can be a mobile phone, a tablet computer, a desktop computer, a laptop computer, an e-reader, a handheld computer, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, and a cellular phone, a personal digital assistant (PDA), an augmented reality (AR)\virtual reality (VR) device, a media player, a smart wearable device and other foldable devices. It can be understood that the foldable electronic device 1 can be a foldable display device or a foldable non-display device. In this application, the foldable electronic device 1 is taken as an example of a foldable mobile phone, and other devices can refer to the specific description in this application.

[0042] For ease of description, the thickness direction of the foldable electronic device 1 is defined as the Z-axis direction, the length direction is defined as the Y-axis direction, and the width direction is defined as the X-axis direction, and the Z-axis, Y-axis, and X-axis are perpendicular to each other. This application does not limit the size of the foldable electronic device 1 in the length direction and the width direction. In some embodiments, the size of the foldable electronic device 1 in the length direction is greater than the size in the width direction, and in other embodiments, the size of the foldable electronic device 1 in the width direction is greater than or equal to the size in the length direction.

[0043] See also Figure 3 and Figure 4 The foldable electronic device 1 includes a foldable body 10 and an antenna assembly 20. The foldable body 10 has an unfolded shape (see Figure 3 ) state and folded state (see Figure 4 The unfolded state is also referred to as the open cover state, or the open cover. The folded state is also referred to as the closed cover state, or the closed cover.

[0044] The foldable body 10 is the skeleton structure of the foldable electronic device 1. The main body shape of the foldable body 10 is consistent with the main body shape of the foldable electronic device 1. When the foldable body 10 is in an unfolded state, the foldable electronic device 1 is in an unfolded state; when the foldable body 10 is in a folded state, the foldable electronic device 1 is in a folded state. Specifically, the foldable body 10 includes but is not limited to being a middle frame of the foldable electronic device 1. In this embodiment and subsequent embodiments, the foldable body 10 is taken as an example to be illustrated as the middle frame of the foldable electronic device 1.

[0045] In the schematic diagram of the present embodiment, the foldable electronic device 1 is taken as an example of an inward-folding foldable electronic device 1. The so-called inward-folding foldable electronic device 1 means that when the foldable electronic device 1 is in a folded state, the display screen 30 of the foldable electronic device 1 is located inside, and the shell 40 is exposed outside. In other embodiments, the foldable electronic device 1 may also be an outward-folding foldable electronic device 1. The so-called outward-folding foldable electronic device 1 means that when the foldable electronic device 1 is in a folded state, the display screen 30 is exposed outside, and the shell 40 is located inside. The present application does not limit whether the foldable electronic device 1 is an inward-folding foldable electronic device 1 or an outward-folding foldable electronic device 1.

[0046] Among them, when the foldable body 10 is in the unfolded state, the foldable body 10 can be flattened at 180°, or flattened at approximately 180° (for example, 170°, or 175°, or 185°, etc.), or can be bent at a certain bending angle, and the bending angle is not limited. In this embodiment, the flattened state of 180° is taken as an example. When the foldable electronic device 1 has a display screen 30, the unfolded area of ​​the display screen 30 is relatively large when in the unfolded state, so that the user can enjoy the foldable electronic device 1 with a large display screen 30. The folded state refers to the state in which the foldable body 10 is bent and stacked. At this time, the overall volume of the foldable electronic device 1 is small and easy to carry.

[0047] This embodiment is described by taking the foldable body 10 as an example of a folded structure having a folding axis L0.

[0048] See also Figure 3, the foldable body 10 includes a first body 11 and a second body 13 that are foldable and conductively connected. In this embodiment, the first body 11 is rotatably connected to the second body 13. Therefore, in other words, the foldable body 10 includes a first body 11 and a second body 13 that are rotatably connected. In this embodiment, at least one of the first body 11 and the second body 13 is connected by a connector 12. The connector 12 can be, but is not limited to, a rotating shaft, a hinge, etc., and is not limited here. In other words, the foldable body 10 includes a first body 11, a connector 12, and a second body 13 that are connected in sequence. In other embodiments, the first body 11 and the second body 13 are directly connected, and the connection between the first body 11 and the second body 13 is bendable. The embodiment of the present application does not limit the way in which the foldable body 10 is bent, as long as the foldable body 10 can be bent.

[0049] It should be noted that at least a portion of the first body 11 of the foldable body 10 is made of a conductive material, at least a portion of the second body 13 of the foldable body 10 is made of a conductive material, and the first body 11 is electrically connected to the second body 13. When the foldable body 10 further includes a connector 12, at least a portion of the connector 12 is made of a conductive material, and the first body 11 is electrically connected to the second body 13 through the connector 12.

[0050] The first body 11 and the second body 13 can be relatively folded or relatively unfolded, so that the foldable body 10 has a folded state and an unfolded state. The state of the foldable electronic device 1 is the same as the state of the foldable body 10. When the foldable body 10 is in the folded state, the foldable electronic device 1 is in the folded state; when the foldable body 10 is in the unfolded state, the foldable electronic device 1 is in the unfolded state. In addition, the foldable electronic device 1 also has an intermediate state between the folded state and the unfolded state.

[0051] Specifically, in the folded state, the first body 11 and the second body 13 are stacked in the thickness direction (Z-axis direction), and specifically, along the Z-axis direction, the first body 11 and the second body 13 are respectively arranged in the upper and lower layers.

[0052] The unfolded state is when the overlap area between the projection of the first body 11 and the projection of the second body 13 is less than a preset area, and the preset area is, for example, 20%, 15%, 10%, 5%, 1%, 0%, etc. of the area of ​​the first body 11. In the schematic diagram of this embodiment, the unfolded state is illustrated by taking the overlap area between the first body 11 and the second body 13 as 0% as an example.

[0053] In this embodiment, the first body 11 and the second body 13 are middle frames of the foldable electronic device 1 .

[0054] Optional, see Figure 1 , the foldable electronic device 1 further includes a display screen 30. The display screen 30 is disposed on one side of the foldable body 10. In this embodiment, the display screen 30 is disposed on the front side of the foldable body 10 (the front side refers to the direction facing the user when the user normally uses the display screen 30). Optionally, in one embodiment, the portion of the display screen 30 corresponding to the connecting member 12 is a bendable flexible display screen 30. Optionally, in another embodiment, the display screen 30 is not disposed at the corresponding portion of the connecting member 12, but two display screens 30 are disposed on the front sides of the first body 11 and the second body 13, respectively.

[0055] Optionally, see Figure 2 , the foldable electronic device 1 further includes a housing 40. When the foldable electronic device 1 is in a flattened state or a nearly flattened state, the display screen 30 and the housing 40 are respectively located on opposite sides (front and rear sides) of the foldable body 10. The display screen 30, the foldable body 10 and the housing 40 make the foldable electronic device 1 form a relatively closed whole device. Of course, in other embodiments, the rear side of the foldable electronic device 1 may also be provided with a display screen 30.

[0056] When the foldable electronic device 1 is a foldable mobile phone, the foldable electronic device 1 also includes a circuit board (including a main board, a sub-board, a flexible circuit board, etc.), a battery, a camera module, a microphone, a receiver, a speaker, a face recognition module, a fingerprint recognition module, etc., which are arranged in the receiving space and can realize the basic functions of the mobile phone. They are not repeated in this embodiment. It can be understood that the above introduction to the foldable electronic device 1 is only an explanation of an environment in which the antenna assembly 20 is applied, and the specific structure of the foldable electronic device 1 should not be understood as a limitation on the antenna assembly 20 provided in this application.

[0057] The structure of the antenna assembly 20 is introduced below.

[0058] Please continue reading Figure 3 and Figure 4 The antenna assembly 20 includes a first radiator 21 and a second radiator 22. The first radiator 21 is disposed on the first body 11. The first radiator 21 has a first grounding terminal 211, a first feeding point P1 and a first free end 212. The first grounding terminal 211 is grounded, and the first feeding point P1 is used to receive a first excitation signal. The second radiator 22 is disposed on the second body 13. The second radiator 22 has a second grounding terminal 221 and a second free end 222. The second grounding terminal 221 is grounded. Figure 4 The connecting member 12 is omitted, and in order to conveniently illustrate the current of the first body 11 and the second body 13 when the foldable electronic device 1 is in the folded state, the posture of the foldable electronic device 1 in the folded state is adjusted, wherein Figure 4 (a) and (b) are schematic diagrams of the foldable electronic device 1 in different viewing angles when in a folded state. When the foldable electronic device 1 is in a folded state: the first excitation signal excites the first body 11 to generate a first current I1 through the first radiator 21, and the second radiator 22 excites the second body 13 to generate a second current I2, wherein the direction of the second current I2 is the same as the direction of the first current I1, and the first current I1 and the second current I2 are both used to support the target frequency band.

[0059] The first radiator 21 can be a Laser Direct Structuring (LDS) radiator, or a Flexible Printed Circuit (FPC) radiator, or a Print Direct Structuring (PDS) radiator, or a metal branch radiator. When the antenna assembly 20 is applied to the foldable electronic device 1, the first radiator 21 can be a structural antenna (Mechanical Design Antenna, MDA) radiator designed using the metal insert of the foldable electronic device 1 itself. For example, the first radiator 21 can be an antenna radiator designed using the middle frame formed by plastic and metal of the foldable electronic device 1. In addition, the first radiator 21 can also be a radiator of a metal frame antenna designed with a metal middle frame.

[0060] It is understandable that the present application does not specifically limit the shape, structure and material of the first radiator 21, and the shapes of the first radiator 21 include but are not limited to bent, straight, L-shaped, sheet-shaped, rod-shaped, coated, thin film, etc. When the first radiator 21 is in a strip shape, the present application does not limit the extension track of the first radiator 21, so the first radiator 21 can be extended in a straight line, a curve, a multi-stage bend, etc. The first radiator 21 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.

[0061] The first grounding terminal 211 is electrically connected to the ground of the foldable electronic device 1 to ground the first grounding terminal 211. The grounding of the first grounding terminal 211 includes but is not limited to the following embodiments. The way in which the first grounding terminal 211 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 foldable electronic device 1 by means of a coaxial line, a microstrip line, a conductive spring, a conductive glue, etc. In this embodiment, the first body 11 is a conductive component that can constitute a ground, and therefore, the first grounding terminal 211 is electrically connected to the first body 11 to be grounded. In this embodiment, the first grounding terminal 211 and the first body 11 can be an integral structure.

[0062] The first feeding point P1 is used to receive a first excitation signal. The first excitation signal may be generated by a feed source S. In this embodiment, the target frequency band is a low frequency band as an example for illustration. It can be understood that in other embodiments, the target frequency band may also be a medium frequency band, or a high frequency band, etc. The source of the first excitation signal will be described in detail later.

[0063] The second radiator 22 can be a Laser Direct Structuring (LDS) radiator, or a Flexible Printed Circuit (FPC) radiator, or a Print Direct Structuring (PDS) radiator, or a metal branch radiator. When the antenna assembly 20 is applied to the foldable electronic device 1, the second radiator 22 can be a structural antenna (Mechanical Design Antenna, MDA) radiator designed using the metal insert of the foldable electronic device 1 itself. For example, the second radiator 22 can be an antenna radiator designed using the middle frame formed by plastic and metal of the foldable electronic device 1. In addition, the second radiator 22 can also be a radiator of a metal frame antenna designed with a metal middle frame.

[0064] It is understandable that the present application does not specifically limit the shape, structure and material of the second radiator 22, and the shapes of the second radiator 22 include but are not limited to bent, straight, L-shaped, sheet-shaped, rod-shaped, coated, thin film, etc. When the second radiator 22 is in a strip shape, the present application does not limit the extension track of the second radiator 22, so the second radiator 22 can extend in a straight line, a curve, a multi-stage bend, etc. The second radiator 22 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.

[0065] The second grounding terminal 221 is electrically connected to the ground of the foldable electronic device 1 to ground the second grounding terminal 221. The grounding of the second grounding terminal 221 includes but is not limited to the following embodiments. The way in which the second grounding terminal 221 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 foldable electronic device 1 by means of a coaxial line, a microstrip line, a conductive spring, a conductive glue, etc. In this embodiment, the second body 13 is a conductive component that can constitute a ground, so the second grounding terminal 221 is electrically connected to the second body 13 to be grounded. In this embodiment, the second grounding terminal 221 and the second body 13 can be an integral structure.

[0066] When the foldable electronic device 1 is in a folded state, the first excitation signal excites the first body 11 through the first radiator 21 to generate the first current I1, which may be that the first radiator 21 receives the first excitation signal generated by the feed source S, and the first radiator 21 excites the first body 11 to generate the first current I1. When the foldable electronic device 1 is in a folded state, the second radiator 22 excites the second body 13 to generate the second current I2 in a manner that is, but not limited to, as follows: when the foldable electronic device 1 is in a folded state, the second radiator 22 does not receive the excitation signal generated by the feed source S, but the second radiator 22 is coupled with the first radiator 21, the second radiator 22 couples the energy of the first radiator 21 to generate a coupling current, and the coupling current of the second radiator 22 excites the second body 13 to generate the second current I2; or, in other embodiments, the second radiator 22 receives the excitation signal generated by the feed source S, the second radiator 22 is excited by the excitation signal, and excites the second body 13 to generate the second current I2. The direction of the second current I2 is the same as the direction of the first current I1. The direction of the first current I1 is related to the position of the first radiator 21 relative to the first body 11, which will be described later in conjunction with a specific embodiment. The direction of the second current I2 is related to the position of the second radiator 22 relative to the second body 13, which will be described later in conjunction with a specific embodiment.

[0067] The antenna assembly 20 in the related art usually does not include the second radiator 22. Therefore, when the foldable electronic device 1 in the related art is in a folded state, the current on the second body 13 is very weak or even no current. Therefore, the radiation efficiency of the foldable electronic device 1 in the folded state is poor. In the antenna assembly 20 of the foldable electronic device 1 provided in this embodiment, since the antenna assembly 20 includes not only the first radiator 21 but also the second radiator 22, when the foldable electronic device 1 is in a folded state, the first radiator 21 can excite the first current I1 of the first body 11, and the second radiator 22 can also excite the second current I2 of the second body 13, and the first current I1 and the second current I2 both support the target frequency band. It can be seen that the antenna assembly 20 of the foldable electronic device 1 provided in the embodiment of the present application excites the second body 13 to generate the second current I2 through the second radiator 22. Therefore, when the foldable electronic device 1 is in a folded state, the radiation efficiency of the antenna assembly 20 when supporting the target frequency band is high.

[0068] See also Figure 3 , the first body 11 and the second body 13 can be folded relative to each other along the folding axis L0. When the foldable electronic device 1 is in an unfolded state, the first radiator 21 and the second radiator 22 are respectively located on two opposite sides of the folding axis L0. When the foldable electronic device 1 is in a folded state, the first radiator 21 and the second radiator 22 are both located on the same side of the folding axis L0. The second radiator 22 has a second feeding point P2, and the second feeding point P2 is used to receive a second excitation signal, and the second excitation signal excites the second body 13 to generate the second current I2 through the second radiator 22, wherein the second excitation signal has the same frequency band and the same phase as the first excitation signal.

[0069] In the schematic diagram of this embodiment, when the foldable electronic device 1 is in the unfolded state: the first radiator 21 is located on the left side of the folding axis L0 and on the side of the first body 11 away from the folding axis L0 (that is, the first side 111) as an example for illustration; the second radiator 22 is located on the right side of the folding axis L0 and on the side of the second body 13 away from the folding axis L0 (that is, the second side 131) as an example for illustration.

[0070] In this embodiment, the second radiator 22 has a second feeding point P2, and the second feeding point P2 is used to receive a second excitation signal. The second excitation signal may be generated by a feed source S. In one embodiment, the second excitation signal and the first excitation signal are generated by the same feed source S. In another embodiment, the second excitation signal and the first excitation signal are generated by different feed sources S. The first excitation signal and the second excitation signal have the same frequency band and the same phase.

[0071] The second excitation signal has the same frequency band as the first excitation signal, which means that the frequency band supported when the second excitation signal generates the second current I2 through the second radiator 22 is the same as the frequency band supported when the first excitation signal generates the first current I1 through the first radiator.

[0072] In the antenna assembly 20 of the foldable electronic device 1 provided in this embodiment, since the antenna assembly 20 includes not only the first radiator 21 but also the second radiator 22, when the foldable electronic device 1 is in a folded state, the first radiator 21 can excite the first current I1 of the first body 11, and the second excitation signal can also excite the second current I2 of the second body 13 through the second radiator 22, and the first current I1 and the second current I2 both support the target frequency band. It can be seen that the antenna assembly 20 of the foldable electronic device 1 provided in the embodiment of the present application excites the second body 13 to generate the second current I2 through the second radiator 22, so when the foldable electronic device 1 is in a folded state, the radiation efficiency of the antenna assembly 20 when supporting the target frequency band is high. In addition, the second radiator 22 receives the second excitation signal through the second feeding point P2, and compared with the coupling current generated by coupling the first radiator 21, the intensity of the second current I2 generated by the second radiator 22 is larger, so that when the foldable electronic device 1 is in a folded state, the radiation efficiency of the antenna assembly 20 when supporting the target frequency band is higher. In addition, compared to the antenna component 20 having only one radiating branch, the antenna component 20 in the embodiment of the present application includes a first radiator 21 and a second radiator 22, and the first feeding point P1 of the first radiator 21 receives the first excitation signal, and the second feeding point P2 of the second radiator 22 receives the second excitation signal. Therefore, the reflection coefficient bandwidth of the antenna component 20 becomes wider and the system efficiency is better, which will be described later in conjunction with the simulation diagram.

[0073] For further information, please refer to Figure 3 and Figure 4, the direction in which the first ground end 211 of the first radiator 21 points to the first free end 212 is the first opening direction, and the direction in which the second ground end 221 of the second radiator 22 points to the second free end 222 is the second opening direction, wherein the second opening direction is the same as the first opening direction. In the schematic diagram of this embodiment, the first opening direction and the second opening direction are both the positive direction of the Y axis for illustration. It can be understood that as the placement posture of the foldable electronic device 1 is different, in other embodiments, the first opening direction and the second opening direction can also be other directions, as long as the first opening direction and the second opening direction are the same.

[0074] In this embodiment, the positions of the first radiator 21 and the second radiator 22 are set, and the phases of the first excitation signal and the second excitation signal are the same, and the first opening direction is the same as the second opening direction, so that the second excitation signal can better stimulate the second body 13 to generate the second current I2 with the same direction as the first current I1 through the second radiator 22, so that when the foldable electronic device 1 is in the folded state, the antenna assembly 20 has a higher radiation efficiency when supporting the target frequency band.

[0075] The structures of the first body 11 and the second body 13 are introduced below.

[0076] Please continue reading Figure 3The first main body 11 includes a first connecting edge 114 and a first side edge 111 which are arranged opposite to each other, and the first connecting edge 114 is arranged adjacent to the folding axis L0 relative to the first side edge 111. The first main body 11 is rectangular or substantially rectangular. The first connecting edge 114 and the first side edge 111 are edges at two ends along the X-axis direction, respectively. The first main body 11 also includes a first bottom edge 112 and a first top edge 113 which are arranged opposite to each other and connected between the first connecting edge 114 and the first side edge 111. The first bottom edge 112 and the first top edge 113 are edges at two ends along the Y-axis direction, respectively. The first bottom edge 112 is connected to the first connecting edge 114 by bending, and the first bottom edge 112 is connected to the first side edge 111 by bending. The first top edge 113 is connected to the first connecting edge 114 by bending, and the first top edge 113 is connected to the first side edge 111 by bending. From another dimension, when the foldable electronic device 1 is in the unfolded state: the first body 11 includes a first side edge 111 disposed opposite to the second body 13 and away from the folding axis L0, a first bottom edge 112 bent and connected to the first side edge 111, a first top edge 113 bent and connected to the first side edge 111, and a first connecting edge 114 disposed opposite to the first side edge 111 and close to the folding axis L0. In other words, when the foldable electronic device 1 is in the unfolded state: the first connecting edge 114 is closer to the folding axis L0 than the first side edge 111, and the first side edge 111 is closer to the folding axis L0 than the first connecting edge 114.

[0077] See also Figure 3The second body 13 includes a second connecting edge 134 and a second side 131 which are arranged opposite to each other, and the second connecting edge 134 is arranged adjacent to the folding axis L0 relative to the second side 131. The second body 13 is rectangular or substantially rectangular. The second connecting edge 134 and the second side 131 are edges at two ends along the X-axis direction, respectively. The second body 13 also includes a second bottom edge 132 and a second top edge 133 which are arranged opposite to each other and connected between the second connecting edge 134 and the second side 131. The second bottom edge 132 and the second top edge 133 are edges at two ends along the Y-axis direction, respectively. The second bottom edge 132 is connected to the second connecting edge 134 by bending, and the second bottom edge 132 is connected to the second side 131 by bending. The second top edge 133 is connected to the second connecting edge 134 by bending, and the second top edge 133 is connected to the second side 131 by bending. From another dimension, when the foldable electronic device 1 is in the unfolded state: the second body 13 includes a second side edge 131 disposed opposite to the second body 13 and away from the folding axis L0, a second bottom edge 132 bent and connected to the second side edge 131, a second top edge 133 bent and connected to the second side edge 131, and a second connecting edge 134 disposed opposite to the second side edge 131 and close to the folding axis L0. In other words, when the foldable electronic device 1 is in the unfolded state: the second connecting edge 134 is closer to the folding axis L0 than the second side edge 131, and the second side edge 131 is away from the folding axis L0 than the second connecting edge 134.

[0078] See also Figure 3 and Figure 4 , the first body 11 and the second body 13 are both conductive members. That is, the first body 11 and the second body 13 are both conductive structures. When the foldable electronic device 1 is in a folded state, the first body 11 and the second body 13 are arranged opposite to each other. The first body 11 and the second body 13 are similar to two adjacent conductive plate structures.

[0079] In one embodiment, the first connecting edge 114 and the second connecting edge 134 are electrically connected via a conductive connector 12. When the foldable electronic device 1 is in a folded state, the first side edge 111 and the second side edge 131 are aligned with each other and spaced apart. In other words, the first body 11 and the second body 13 have the same or approximately the same size in the X-axis direction.

[0080] See also Figure 3 and Figure 4When the foldable electronic device 1 is in an unfolded state, the first bottom edge 112 and the second bottom edge 132 are arranged in a collinear or approximately collinear manner. When the foldable electronic device 1 is in a folded state, the first bottom edge 112 and the second bottom edge 132 are aligned and spaced apart.

[0081] See also Figure 3 and Figure 4 When the foldable electronic device 1 is in an unfolded state, the first top edge 113 and the second top edge 133 are arranged in a collinear or approximately collinear manner. When the foldable electronic device 1 is in a folded state, the first top edge 113 and the second top edge 133 are aligned and spaced apart.

[0082] When the foldable electronic device 1 is in an unfolded state: the first body 11 includes a first side 111 disposed opposite to the second body 13 and away from the folding axis L0, and a first bottom 112 bent and connected to the first side 111. The first radiator 21 is disposed adjacent to the first side 111, and the first free end 212 is away from the first bottom 112 compared to the first ground end 211. When the foldable electronic device 1 is in an unfolded state: the second body 13 includes a second side 131 disposed opposite to the first body 11 and away from the folding axis L0, and a second bottom 132 bent and connected to the second side 131, the second radiator 22 is disposed adjacent to the second side 131, and the second free end 222 is away from the second bottom 132 compared to the second ground end 221.

[0083] The first free end 212 is away from the first bottom edge 112 compared to the first ground end 211. Therefore, in the schematic diagram of this embodiment, the first free end 212 is located at the top of the first radiator 21, and the first ground end 211 is located at the bottom of the first radiator 21. It can be understood that as the placement posture of the foldable electronic device 1 changes, the positions of the first free end 212 and the first ground end 211 will also change.

[0084] The second free end 222 is away from the first bottom edge 112 compared to the second ground end 221. Therefore, in the schematic diagram of this embodiment, the second free end 222 is located at the top of the second radiator 22, and the first ground end 211 is located at the bottom of the second radiator 22. It can be understood that as the placement posture of the foldable electronic device 1 changes, the positions of the second free end 222 and the second ground end 221 will also change.

[0085] In this embodiment, the relative position setting of the first free end 212 of the first radiator 21 and the first ground end 211, the relative position setting of the second free end 222 of the second radiator 22 and the second ground end 221, and the phase of the first excitation signal and the second excitation signal are the same, so that the second excitation signal can better stimulate the second body 13 to generate the second current I2 with the same direction as the first current I1 through the second radiator 22, so that when the foldable electronic device 1 is in the folded state, the radiation efficiency of the antenna assembly 20 when supporting the target frequency band is higher.

[0086] For further information, see Figure 5 , Figure 6 , Figure 7 and Figure 8 , Figure 5 A schematic diagram showing the dimensions of some components of an antenna assembly in a foldable electronic device provided in one embodiment; Figure 6 A schematic diagram showing the dimensions of some components of an antenna assembly in a foldable electronic device provided in one embodiment; Figure 7 A schematic diagram of a user holding a foldable electronic device in his right hand; Figure 8 Schematic diagram of a user holding a foldable electronic device with his left hand. In order to conveniently illustrate the relative position relationship between the user's hand and the first radiator 21 and the second radiator 22 of the antenna assembly 20 in the foldable electronic device 1, Figure 7 and Figure 8 Other structures in the foldable electronic device 1 are omitted. For example, when the foldable electronic device 1 includes a display screen 30 and a housing 40, the display screen 30 and the housing 40 are omitted. Figure 5 , the distance d from the end surface of the first free end 212 away from the first bottom edge 112 to the first bottom edge 112 11 Satisfaction:d 11 ≥89mm, the first grounding end 211 is connected to the first body 11 for grounding, and the distance d from the connection between the first grounding end 211 and the first body 11 to the first bottom edge 112 is 12 Satisfy: 30mm≤d 12 ≤75mm.

[0087] The distance d 11 It may be, but is not limited to, 89 mm, 90 mm, 91 mm, 92 mm, 93 mm, 94 mm, 95 mm, etc. It is understandable that in one embodiment, since the first radiator 21 is disposed adjacent to the first side edge 111 , the first free end 212 is located between the first bottom edge 112 and the first top edge 113 .

[0088] 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.

[0089] See also Figure 6 , the distance d from the end surface of the second free end 222 away from the first bottom edge 112 to the second bottom edge 132 21 Satisfaction:d 21 ≥89mm, the second grounding end 221 is connected to the second body 13 with a base, and the distance d from the connection between the second grounding end 221 and the second body 13 to the second bottom edge 132 is 22 Satisfy: 30mm≤d 22 ≤75mm. The distance d 21 It may be, but is not limited to, 89 mm, 90 mm, 91 mm, 92 mm, 93 mm, 94 mm, 95 mm, etc. It is understandable that in one embodiment, since the second radiator 22 is disposed adjacent to the second side edge 131 , the second free end 222 is located between the second bottom edge 132 and the second top edge 133 .

[0090] 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.

[0091] The d 11 ,d 12 ,d 21 ,d 22 The above range can make it possible for the user to hold the foldable electronic device 1 in the left and right hands when the foldable electronic device 1 is in the folded state, and the fingers can touch the first radiator 21 and the second radiator 22. For example, the d 11 ,d 12 ,d 21 ,d 22The above range can make the position of the gap between the first free end 212 and the first body 11 (i.e., the first gap 521) be located above the thumb and middle finger of the user, the position of the gap between the second free end 222 and the second body 13 (i.e., the third gap 621) be located above the thumb and middle finger of the user, and the first grounding end 211 be below the thumb and middle finger of the user, and the second grounding end 221 be below the thumb and middle finger of the user. Specifically, when the foldable electronic device 1 is in the folded state and is held by the user with the right hand, the position of the gap between the first free end 212 and the first body 11 (i.e., the first gap 521) be located above the thumb of the user, the position of the gap between the second free end 222 and the second body 13 (i.e., the third gap 621) be located above the thumb of the user, and the first grounding end 211 and the second grounding end are both below the thumb of the user. When the foldable electronic device 1 is in a folded state and is held by the user's left hand, the gap between the first free end 212 and the first body 11 (i.e., the first gap 521) is located above the user's middle finger, the gap between the second free end 222 and the second body 13 (i.e., the third gap 621) is located above the user's middle finger, and the first grounding end 211 and the second grounding end 221 are both below the user's middle finger.

[0092] As an object with high dielectric constant characteristics, the human body has radiation performance and energy loss characteristics. When the user's finger contacts the first radiator 21 and the second radiator 22, 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 contacts the first radiator 21 and the second radiator 22, the human body is stimulated by the vertical electric field in the first radiator 21 and the second radiator 22 and exhibits radiation characteristics, so that the system radiation efficiency of the foldable electronic device 1 is high when it is in the folded state and held by the user's hand. Generally speaking, there is a gap between the first radiator 21 and the first body 11, and the remaining surfaces of the first radiator 21 except the surface facing the gap have an electric field perpendicular to the surface. Correspondingly, there is a gap between the second radiator 22 and the second body 13, and the remaining surfaces of the second radiator 22 except the surface facing the gap have an electric field perpendicular to the surface. Later, the system radiation efficiency of the foldable electronic device 1 when held by the user's right hand and left hand will be described in detail in conjunction with the simulation diagram.

[0093] It should be noted that in Figure 7 and Figure 8The example in which the user's hand holds the foldable electronic device 1 in a folded state and contacts the first radiator 21 and the second radiator 22 is used for illustration. It can be understood that when the user's hand holds the foldable electronic device 1 in a folded state and contacts at least one of the first radiator 21 and the second radiator 22, the at least one is used to stimulate the user's hand holding the foldable electronic device 1.

[0094] It can be seen that the foldable electronic device 1 provided in the embodiment of the present application can reduce or even avoid the deterioration of the transmission performance and receiving performance of the antenna assembly 20 caused by the hand holding when the foldable electronic device 1 is in a foldable state, which leads to the deterioration of the user experience. In other words, the foldable electronic device 1 provided in the embodiment of the present application can effectively improve the antenna performance when the user holds the foldable electronic device 1 by hand, so as to achieve a radiation performance comparable to that of the foldable electronic device 1 when it is in free space, or even exceed the radiation performance of the foldable electronic device 1 when it is in free space.

[0095] Please refer again Figure 4 When the foldable electronic device 1 is in a folded state: the first current I1 extends in the same direction as the first side 111 , and the second current I2 extends in the same direction as the second side 131 .

[0096] In this embodiment, the extension direction of the first side 111 is the Y-axis direction, and the extension direction of the second side 131 is the Y-axis direction. In the schematic diagram of this embodiment, in the current half-wavelength period, the directions of the first current I1 and the second current I2 are both in the positive direction of the Y-axis. It can be understood that the first current I1 and the second current I2 are both periodic, and in the next half-wavelength period, the directions of the first current I1 and the second current I2 are both in the negative direction of the Y-axis.

[0097] In this embodiment, the first side 111 and the second side 131 are both long sides of the foldable electronic device 1 in a folded state. Therefore, in this embodiment, the first current I1 and the second current I2 are both referred to as longitudinal currents.

[0098] In this embodiment, when the foldable electronic device 1 is in a folded state: the first current I1 is in the same extension direction as the first side 111, and the second current I2 is in the same extension direction as the second side 131, so that when the foldable electronic device 1 is in a folded state, the antenna assembly 20 has a higher radiation efficiency when supporting the target frequency band.

[0099] exist Figure 3 to Figure 4In the illustrated embodiment, when the foldable electronic device 1 is in a folded state: the first excitation signal and the second excitation signal have the same frequency band and the same phase. When the foldable electronic device 1 is in an unfolded state: the first excitation signal and the second excitation signal have the same frequency band and the same phase.

[0100] See also Fig. 9 , Fig.10 , Fig.11 and Fig.12 , Fig. 9 A schematic structural diagram of a foldable electronic device in an unfolded state provided by another embodiment of the present application; Fig.10 for Fig. 9 A schematic diagram of a foldable electronic device in a folded state as shown in ; Fig.11 An implementation method provided Fig. 9 A schematic diagram of a partial structure of a foldable electronic device; Fig.12 An implementation method provided Fig.10 Schematic diagram of the flow direction of the first current and the second current in the antenna assembly of the foldable electronic device shown in . When the foldable electronic device 1 is in the unfolded state: the first body 11 includes a first side 111 disposed opposite to the second body 13, and a first top 113 bent and connected to the first side 111. The first radiator 21 is located at the first top 113, and the first free end 212 is adjacent to the second body 13 compared to the first ground end 211. The second body 13 includes a second side 131 disposed opposite to the first body 11, and a second top 133 bent and connected to the first side 111; the second radiator 22 is located at the second top 133, and the second free end 222 is adjacent to the first body 11 compared to the second ground end 221. The second radiator 22 has a second feeding point P2, and the second feeding point P2 is used to receive a second excitation signal. When the foldable electronic device 1 is in an unfolded state: the second excitation signal has the same frequency band as the first excitation signal, and the phase difference is 180°; when the foldable electronic device 1 is in a folded state: the second excitation signal has the same frequency band as the first excitation signal, and the phase difference is 180°, so that the first excitation signal generates the first current I1 through the first body 11 (see Fig.12 (a)), the second excitation signal generates the second current I2 through the second body 13 (see Fig.12 (b) in the figure.

[0101] When the foldable electronic device 1 is in a folded state: the second excitation signal has the same frequency band as the first excitation signal, and the phase difference is 180°, the first excitation signal excites the first body 11 to generate a first current I1, and the second excitation signal excites the second body 13 to generate a second current I2, wherein the first current I1 and the second current I2 have the same flow direction. For example, in the current half-wavelength period, the directions of the first current I1 and the second current I2 are both in the positive direction of the X-axis for illustration. It can be understood that the first current I1 and the second current I2 are both periodic, and in the next half-wavelength period, the directions of the first current I1 and the second current I2 are both in the negative direction of the X-axis.

[0102] In the schematic diagram of this embodiment, when the foldable electronic device 1 is in the unfolded state: the first radiator 21 is located on the left side of the folding axis L0 and on the top edge of the first body 11 (i.e., the first top edge 113) as an example for illustration; the second radiator 22 is located on the right side of the folding axis L0 and on the top edge of the second body 13 (i.e., the second top edge 133) as an example for illustration.

[0103] Because when the foldable electronic device 1 is in the unfolded state, the first free end 212 is adjacent to the first body 11 compared to the first end, and the second free end 222 is adjacent to the first body 11 compared to the second ground end 221, therefore, when the foldable electronic device 1 is in the folded state, the opening of the first radiator 21 is opposite to the opening of the second radiator 22.

[0104] In this embodiment, the second excitation signal may be generated by a feed source S. In one embodiment, the second excitation signal and the first excitation signal are generated by the same feed source S. In another embodiment, the second excitation signal and the first excitation signal are generated by different feed sources S. As long as the following conditions are met: when the foldable electronic device 1 is in an unfolded state: the second excitation signal and the first excitation signal have the same frequency band and a phase difference of 180°; when the foldable electronic device 1 is in a folded state: the second excitation signal and the first excitation signal have the same frequency band and the same phase.

[0105] In the antenna assembly 20 of the foldable electronic device 1 provided in this embodiment, since the antenna assembly 20 includes not only the first radiator 21 but also the second radiator 22, when the foldable electronic device 1 is in a folded state, the first radiator 21 can excite the first current I1 of the first body 11, and the second radiator 22 can also excite the second current I2 of the second body 13, and the first current I1 and the second current I2 both support the target frequency band. It can be seen that the antenna assembly 20 of the foldable electronic device 1 provided in the embodiment of the present application excites the second body 13 to generate the second current I2 through the second radiator 22, so when the foldable electronic device 1 is in a folded state, the radiation efficiency of the antenna assembly 20 when supporting the target frequency band is high.

[0106] When the foldable electronic device 1 is in a folded state: the first current I1 extends in the same direction as the first top edge 113 , and the second current I2 extends in the same direction as the second top edge 133 .

[0107] In this embodiment, the extension direction of the first top edge 113 is the X-axis direction, and the extension direction of the second top edge 133 is the X-axis direction. In the schematic diagram of this embodiment, in the current half-wavelength period, the directions of the first current I1 and the second current I2 are both in the positive direction of the X-axis. It can be understood that the first current I1 and the second current I2 are both periodic, and in the next half-wavelength period, the directions of the first current I1 and the second current I2 are both in the negative direction of the X-axis.

[0108] In this embodiment, the first top side 113 and the second top side 133 are both short sides of the foldable electronic device 1 in the folded state, and therefore, the first current I1 and the second current I2 are both referred to as transverse currents.

[0109] In this embodiment, when the foldable electronic device 1 is in a folded state: the first current I1 is in the same extension direction as the first top edge 113, and the second current I2 is in the same extension direction as the second top edge 133, so that when the foldable electronic device 1 is in a folded state, the antenna assembly 20 has a higher radiation efficiency when supporting the target frequency band.

[0110] In combination with the above-described implementation method in which the first radiator 21 has a first feeding point P1 and receives a first excitation signal, and the second radiator 22 has a second feeding point P2 and receives a second excitation signal (for example, Figures 1 to 4 and Figures 9 to 12In the embodiment described, further, the foldable electronic device 1 also satisfies the following conditions, which are described in detail as follows. When the foldable electronic device 1 is in a folded state: the first excitation signal excites the first body 11 through the first radiator 21 to generate the first current I1, and the resonant frequency point when supporting the target frequency band is the first resonant frequency point, and the bandwidth is the first bandwidth. When the foldable electronic device 1 is in a folded state: the second excitation signal excites the second body 13 through the second radiator 22 to generate the second current I2, and the resonant frequency point when supporting the target frequency band is the second resonant frequency point, and the bandwidth of the antenna assembly 20 when supporting the target frequency band is the second bandwidth, wherein the second resonant frequency point is the same as the first resonant frequency point, and the second bandwidth is greater than the first bandwidth.

[0111] In the antenna assembly 20 in the foldable electronic device 1 provided in this embodiment, the first excitation signal is fed to the first radiator 21 through the first feeding point P1, and the second excitation signal is fed to the second radiator 22 through the second feeding point P2, so that the first resonant frequency is the same as the second resonant frequency. In addition, the antenna assembly 20 of the foldable electronic device 1 includes not only the first radiator 21 but also the second radiator 22. Therefore, when the foldable electronic device 1 is in a folded state, the first radiator 21 can excite the first current I1 of the first body 11, and the second excitation signal also excites the second current I2 of the second body 13 through the second radiator 22. The first current I1 and the second current I2 both support the target frequency band. It can be seen that the antenna assembly 20 of the foldable electronic device 1 provided in the embodiment of the present application excites the second body 13 to generate the second current I2 through the second radiator 22. Therefore, when the foldable electronic device 1 is in a folded state, the radiation efficiency of the antenna assembly 20 when supporting the target frequency band is high. In addition, the second radiator 22 receives the second excitation signal through the second feeding point P2. Compared with the coupling current generated by coupling the first radiator 21, the intensity of the second current I2 generated by the second radiator 22 is larger, so that when the foldable electronic device 1 is in a folded state, the radiation efficiency of the antenna component 20 when supporting the target frequency band is higher. In addition, compared with the antenna component 20 having only one radiation branch, the antenna component 20 in the embodiment of the present application includes a first radiator 21 and a second radiator 22, and the first feeding point P1 of the first radiator 21 receives the first excitation signal, and the second feeding point P2 of the second radiator 22 receives the second excitation signal. Therefore, the reflection coefficient bandwidth of the antenna component 20 becomes wider (that is, the second bandwidth is greater than the first bandwidth), and the system efficiency is better, which will be described later in conjunction with the simulation diagram.

[0112] In combination with the above-described implementation method in which the first radiator 21 has a first feeding point P1 and receives a first excitation signal, and the second radiator 22 has a second feeding point P2 and receives a second excitation signal (for example, Figures 1 to 4 and Figures 9 to 12 In the embodiment described in the introduction), further, the foldable electronic device 1 also satisfies the following conditions, which are described in detail as follows. The antenna assembly 20 also includes a feed source S, a first matching branch 23 and a second matching branch 24. The feed source S is used to generate an original excitation signal, and the original excitation signal has an original phase. One end of the first matching branch 23 is electrically connected to the feed source S to receive the original excitation signal, and the other end is electrically connected to the first feeding point P1. The first matching branch 23 is used to match the output impedance of the feed source S with the input impedance of the first radiator 21, and output the first excitation signal, wherein the first excitation signal has a first phase. One end of the second matching branch 24 is electrically connected to the feed source S to receive the original excitation signal, and the other end is electrically connected to the second feeding point P2. The second matching branch 24 is used to match the output impedance of the feed source S with the input impedance of the second radiator 22, and output the second excitation signal, wherein the second excitation signal has a second phase, and the second phase is the same as the first phase.

[0113] In this embodiment, the antenna assembly 20 shares a feed source S. One end of the first matching branch 23 is electrically connected to the feed source S, and the other end is electrically connected to the first feeding point P1. The first matching branch 23 is used to match the output impedance of the feed source S with the input impedance of the first radiator 21, so that the first radiator 21 has better radiation efficiency when supporting the target frequency band. The first matching branch 23 receives the original excitation signal output by the feed source S. The first matching branch 23 can adjust the phase of the received original excitation signal to obtain the first excitation signal, wherein the first excitation signal has a first phase. In one embodiment, the first phase is different from the original phase; in another embodiment, the first phase is the same as the original phase.

[0114] One end of the second matching branch 24 is electrically connected to the feed source S, and the other end is electrically connected to the second feeding point P2. The second matching branch 24 is used to match the output impedance of the feed source S with the input impedance of the second radiator 22, so that the second radiator 22 has better radiation efficiency when supporting the target frequency band. The second matching branch 24 receives the original excitation signal output by the feed source S, and the first matching branch 23 adjusts the phase of the received original excitation signal to obtain the second excitation signal, wherein the second excitation signal has a second phase. In one embodiment, the second phase is different from the original phase; in another embodiment, the second phase is the same as the original phase, as long as the second phase is the same as the first phase.

[0115] The first matching branch 23 and the second matching branch 24 are described in detail below. Figure 3 and Fig.11 , further, the first matching branch 23 includes a first matching circuit M1, a first transmission line 231 and a second matching circuit M2. It can be understood that each matching circuit can also be called a matching network. The input end of the first matching circuit M1 is electrically connected to the feed source S. One end of the first transmission line 231 is electrically connected to the output end of the first matching circuit M1. The input end of the second matching circuit M2 is electrically connected to the other end of the first transmission line 231, and the output end of the second matching circuit M2 is electrically connected to the first feeding point P1. The second matching circuit M2, the first transmission line 231 and the first matching circuit M1 jointly act on the original excitation signal to obtain the first excitation signal. The second matching branch 24 includes the first matching circuit M1, the second transmission line 241 and the third matching circuit M3. One end of the second transmission line 241 is electrically connected to the output end of the first matching circuit M1. The input end of the third matching circuit M3 is electrically connected to the other end of the second transmission line 241, and the other end of the third matching circuit M3 is electrically connected to the second feeding point P2. The third matching circuit M3 , the second transmission line 241 , and the first matching circuit M1 jointly act on the original excitation signal to obtain the second excitation signal.

[0116] The antenna assembly 20 provided in this embodiment not only uses the second matching circuit M2 to adjust the phase of the original excitation signal output by the feed source S, uses the third matching circuit M3 to adjust the phase of the original excitation signal output by the feed source S, but also uses the first matching circuit M1 to adjust the phase of the original excitation signal output by the feed source S, so that the phase of the first excitation signal and the phase of the second excitation signal obtained can be equal.

[0117] In addition, the first transmission line 231 also adjusts the phase of the original excitation signal, and the second transmission line 241 also changes (also referred to as adjusts) the phase of the original excitation signal. In one embodiment, when the phase change amount of the original excitation signal by the first matching circuit M1 and the second matching circuit M2 is equal to the phase change amount of the original excitation signal by the first matching circuit M1 and the third matching circuit M3, the phase change amount of the original excitation signal by the first transmission line 231 is equal to the phase change amount of the original excitation signal by the second transmission line 241. For example, the first transmission line 231 and the second transmission line 241 are of the same type and have the same length. It can be understood that in other embodiments, the phase change amount of the original excitation signal by the first transmission line 231 is not equal to the phase change amount of the original excitation signal by the second transmission line 241, as long as the phase change amount of the original excitation signal by the first matching branch 23 is equal to the phase change amount of the original excitation signal by the second matching branch 24.

[0118] In addition, in one embodiment, the antenna assembly 20 further includes a first switch network SW1 . The first switch network SW1 is electrically connected to the first radiator 21 , and the first switch network SW1 is used to adjust a target frequency band supported by the first radiator 21 .

[0119] In one embodiment, the antenna assembly 20 further includes a second switch network SW2 . The second switch network SW2 is electrically connected to the second radiator 22 , and the second switch network SW2 is used to adjust a target frequency band supported by the second radiator 22 .

[0120] See also Fig.13 , Fig.14 and Fig.15 , Fig.13 A schematic diagram of an antenna assembly in a foldable electronic device provided in another embodiment of the present application; Fig.14 An embodiment is shown Fig.13 A schematic diagram of an antenna assembly of a foldable electronic device; Fig.15 Another embodiment is shown Fig.13 Schematic diagram of antenna components for a foldable electronic device. Fig.13 and Fig.15 The antenna assembly 20 of the foldable electronic device 1 is in an unfolded state, Fig.14The antenna assembly 20 in the foldable electronic device 1 shown is in a folded state. The antenna assembly 20 includes a first radiator 21 and a second radiator 22. The first radiator 21 is arranged corresponding to the first body 11, and the first radiator 21 has a first grounding end 211, a first feeding point P1 and a first free end 212, the first grounding end 211 is grounded, and the first feeding point P1 is used to receive a first excitation signal. The second radiator 22 is arranged corresponding to the second body 13, and the second radiator 22 has a second grounding end 221 and a second free end 222, and the second grounding end 221 is grounded. When the foldable electronic device 1 is in a folded state: the first excitation signal excites the first body 11 to generate a first current I1 through the first radiator 21, and the second radiator 22 excites the second body 13 to generate a second current I2, wherein the direction of the second current I2 is the same as the direction of the first current I1, and the first current I1 and the second current I2 are both used to support the target frequency band.

[0121] In addition, in this embodiment, the antenna assembly 20 further includes a feed source S. The feed source S is electrically connected to the first feeding point P1, and the feed source S is used to generate the first excitation signal. When the foldable electronic device 1 is in a folded state: the second radiator 22 is coupled with the first radiator 21 to generate a coupling current, and the second radiator 22 excites the second body 13 to generate the second current I2.

[0122] In an embodiment, the first radiator 21 has a first feeding point P1, and the first excitation signal generated by the feed source S is transmitted to the first radiator 21 through the first feeding point P1. Therefore, the first radiator 21 can effectively excite the first current I1 of the first body 11 under the effective excitation of the feed source S. In addition, if the second radiator 22 does not exist, the current on the second body 13 is very weak, which will cause the efficiency of the foldable electronic device 1 to be poor when it is in a folded state. The antenna assembly 20 in the foldable electronic device 1 provided in the embodiment of the present application includes a second radiator 22. When the foldable electronic device 1 is in a folded state, the second radiator 22 is coupled with the first radiator 21. In other words, when the foldable electronic device 1 is in a folded state, the second radiator 22 serves as a coupling branch of the first radiator 21. When the foldable electronic device 1 is in a folded state, the second radiator 22, as a coupling branch of the first radiator 21, can obtain energy from the first radiator 21 through electric field coupling in space, thereby exciting the second body 13, and then realizing the improvement of the efficiency of the foldable electronic device 1 in the folded state. A detailed description will be given later in conjunction with the simulation diagram.

[0123] Furthermore, when the foldable electronic device 1 is in a folded state: the first radiator 21 generates a first resonance mode, and the first resonance mode is a quarter-wavelength mode of the target frequency band, and the second radiator 22 generates a second resonance mode, and the second resonance mode is a quarter-wavelength mode of the target frequency band.

[0124] In this embodiment, the foldable electronic device 1 has two resonance modes (i.e., the first resonance mode and the second resonance mode) when it is in the folded state, so that the bandwidth of the antenna component 20 when supporting the target frequency band is wider. When the antenna component 20 supports the target frequency band, it has better radiation efficiency.

[0125] It should be noted that the "wavelength" of the "quarter wavelength mode" in "the first resonant mode is a quarter wavelength mode of the target frequency band" refers to the wavelength corresponding to the center frequency of the target frequency band. The quarter wavelength mode is also called the fundamental mode. The first radiator 21 generates a first resonant mode, and the first resonant mode is a quarter wavelength mode of the target frequency band, so that the antenna assembly 20 works in the fundamental mode when supporting the target frequency band, and has a higher radiation efficiency.

[0126] Correspondingly, the "wavelength" of the "quarter wavelength mode" in "the second resonant mode is a quarter wavelength mode of the target frequency band" refers to the wavelength corresponding to the center frequency of the target frequency band. The quarter wavelength mode is also called the fundamental mode. The second radiator 22 generates a second resonant mode, and the second resonant mode is a quarter wavelength mode of the target frequency band, so that the antenna assembly 20 works in the fundamental mode when supporting the target frequency band, and has a higher radiation efficiency.

[0127] Furthermore, the first resonance mode has a first resonance frequency point, and the second resonance mode has a second resonance frequency point, wherein the second resonance frequency point is greater than the first resonance frequency point.

[0128] In this embodiment, when the foldable electronic device 1 is in a folded state, it has two resonance modes (i.e., the first resonance mode and the second resonance mode), so that the bandwidth of the antenna component 20 supporting the target frequency band is wider. It should be noted that if the second resonance frequency is lower than the first resonance frequency, two floor currents in opposite directions will be excited on the foldable body 10 when the foldable electronic device 1 is in a folded state, which will reduce the efficiency of the antenna component 20 supporting the preset frequency band. In the foldable electronic device 1 provided in this embodiment, the second resonance frequency is higher than the first resonance frequency, and the two floor currents in the same direction (i.e., the first current I1 and the second current I2) of the foldable body 10 can be better excited when the foldable electronic device 1 is in a folded state, so that the antenna component 20 has not only a wider bandwidth but also a higher efficiency when supporting the target frequency band.

[0129] Furthermore, the electrical length of the second radiator 22 is smaller than the electrical length of the first radiator 21 .

[0130] Generally, the longer the electrical length of the radiator, the lower the frequency of the resonant frequency point of the supported frequency band; correspondingly, the shorter the electrical length of the radiator, the higher the frequency of the resonant frequency point of the supported frequency band. In this embodiment, the electrical length of the second radiator 22 is smaller than the electrical length of the first radiator 21, so as to support the second resonant frequency point to be greater than the first resonant frequency point.

[0131] In the foldable electronic device 1 provided in this embodiment, the second resonant frequency is greater than the first resonant frequency. When the foldable electronic device 1 is in a folded state, the two floor currents in the same direction of the foldable body 10 (i.e., the first current I1 and the second current I2) can be better excited, so that the antenna assembly 20 supports the target frequency band with not only a wider bandwidth but also higher efficiency.

[0132] Furthermore, a difference f0 between the second resonant frequency point and the first resonant frequency point satisfies: 70 MHz≤f0≤130 MHz.

[0133] f0 satisfies: 70MHz≤f0≤130MHz, which is equivalent to f0 satisfying: (100-30)MHz≤f0≤(100+30)MHz. f0 can be, but is not limited to, 70MHz, 80MHz, 90MHz, 100MHz, 110MHz, 120MHz, or 130MHz.

[0134] When the difference f0 between the second resonant frequency and the first resonant frequency satisfies: 70MHz≤f0≤130MHz, the two floor currents in the same direction (i.e., the first current I1 and the second current I2) of the foldable body 10 can be better stimulated when the foldable electronic device 1 is in a folded state, so that the antenna assembly 20 supports the target frequency band with not only a wider bandwidth but also higher efficiency.

[0135] It should be noted that in Fig.13 The first radiator 21 in the antenna assembly 20 shown in FIG. 1 is located at the first side 111, and the second radiator 22 is located at the second side 131. Fig.16 The first radiator 21 in the antenna assembly 20 shown in FIG. 1 is located at the first top edge 113 , and the second radiator 22 is located at the second top edge 133 .

[0136] In addition, in one embodiment, please continue to refer to Fig.13 and Fig.15 The antenna assembly 20 further includes a matching circuit (labeled as a second matching circuit M2), and the feed source S is electrically connected to the matching circuit to the first feeding point P1. The matching circuit is used to match the output impedance of the feed source S with the output impedance of the first radiator 21. In addition, the matching circuit is also used to adjust the phase of the original excitation signal output by the feed source S to obtain a first excitation signal with a first phase.

[0137] In addition, in one embodiment, the antenna assembly 20 further includes a first switch network SW1 . The first switch network SW1 is electrically connected to the first radiator 21 , and the first switch network SW1 is used to adjust a target frequency band supported by the first radiator 21 .

[0138] In one embodiment, the antenna assembly 20 further includes a second switch network SW2 . The second switch network SW2 is electrically connected to the second radiator 22 , and the second switch network SW2 is used to adjust a target frequency band supported by the second radiator 22 .

[0139] See also Fig.16 and Fig.17 , Fig.16 A schematic diagram of electric fields of a first radiator and a second radiator of a foldable electronic device in a folded state provided by an embodiment; Fig.17 for Fig.16The first radiator 21 has a first end surface 21a facing away from the first body 11, and the second radiator 22 has a second end surface 22a facing away from the second body 13. When the foldable electronic device 1 is in a folded state: the first radiator 21 generates a first electric field perpendicular to the first end surface 21a, and the second radiator 22 has a second electric field perpendicular to the second end surface 22a. The first electric field Fig.16 and Fig.17 The arrow in FIG. 1 is perpendicular to the first end surface 21a and away from the first body 11; the second electric field is shown in FIG. Fig.16 and Fig.17 The arrow in the figure is perpendicular to the second end surface 22a and away from the second body 13. The directions of the arrows of the first electric field and the second electric field in the schematic diagram of this embodiment should not be understood as limiting the embodiments of this application.

[0140] It should be noted that the first electric field and the second electric field are also periodic. In the current half-wavelength period, when the foldable electronic device 1 is in a folded state, the first radiator 21 generates a first electric field perpendicular to the first end face 21a and away from the first body 11, and the second radiator 22 generates a second electric field perpendicular to the second end face 22a and away from the second body 13. In the next half-wavelength period, when the foldable electronic device 1 is in a folded state, the first radiator 21 generates a first electric field perpendicular to the first end face 21a and toward the first body 11, and the second radiator 22 generates a second electric field perpendicular to the second end face 22a and toward the second body 13.

[0141] It can be understood that the direction of the first electric field and the direction of the first current are in a one-to-one correspondence; in other words, when the direction of the first current is determined, the direction of the first electric field is also determined. Correspondingly, the direction of the second electric field and the direction of the second current are in a one-to-one correspondence, and when the direction of the second current is determined, the direction of the second electric field is also determined.

[0142] The first radiator 21 generates a first electric field perpendicular to the first end surface 21a, and the second radiator 22 has a second electric field perpendicular to the second end surface 22a. It is applicable to the implementation method described above in which the first radiator 21 is fed with a first excitation current through the first feeding point P1 and the second radiator 22 is fed with a second excitation current through the second feeding point P2, and is also applicable to the implementation method in which the second radiator 22 is coupled with the first radiator 21 to generate a coupling current when the foldable electronic device 1 is in a folded state.

[0143] Since when the foldable electronic device 1 is in the folded state: the first radiator 21 generates a first electric field perpendicular to the first end surface 21a, and the second radiator 22 has a second electric field perpendicular to the second end surface 22a, the human body, as an object with high dielectric constant characteristics, has radiation performance and energy loss characteristics. When the user's finger contacts the first radiator 21 and the second radiator 22, 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 contacts the first end surface 21a of the first radiator 21 and the second end surface 22a of the second radiator 22, the human body is stimulated by the first electric field of the first radiator 21 and the second electric field of the second radiator 22 to exhibit radiation characteristics, so that the system radiation efficiency of the foldable electronic device 1 is high when it is in the folded state and held by the user's hand. The system radiation efficiency of the foldable electronic device 1 when held by the user's right hand and left hand will be described in detail later in conjunction with the simulation diagram.

[0144] In addition, it should be noted that the first end surface 21a of the first radiator 21 has a first electric field perpendicular to the first end surface 21a. The first radiator 21 also has two side surfaces connected to the first end surface 21a by bending, and one of the two side surfaces has an electric field perpendicular to the one; correspondingly, the other of the two side surfaces also has an electric field perpendicular to the other. When the foldable electronic device 1 is in a folded state, no matter the user's fingers touch the first end surface 21a of the first radiator 21 or hold the two side surfaces of the first radiator 21 connected to the first end surface 21a by bending, the radiation characteristics of the human body can be stimulated, so that the system radiation efficiency of the foldable electronic device 1 is higher when it is in a folded state and held by the user's hand.

[0145] Correspondingly, the second end 22a of the second radiator 22 has a second electric field perpendicular to the second end face 22a. The second radiator 22 also has two side faces connected to the second end face 22a by bending, and one of the two side faces has an electric field perpendicular to the one; accordingly, the other of the two side faces also has an electric field perpendicular to the other. When the foldable electronic device 1 is in a folded state, no matter the user's fingers hold and touch the second end face 22a of the second radiator 22 or hold the two side faces of the second radiator 22 connected to the second end face 22a by bending, the radiation effect of the human body can be stimulated, so that the system radiation efficiency of the foldable electronic device 1 is higher when it is in a folded state and held by the user's hand.

[0146] It should be noted that when the foldable electronic device 1 is in the folded state, whether the first radiator 21 is held is related to the position of the slit between the first radiator 21 and the first body 11 and the position of the ground return. Since the first free end 212 and the first ground end 211 are formed by the slit between the first radiator 21 and the first body 11, whether the first radiator 21 is held is related to the distance from the end face of the first free end 212 away from the first bottom edge 112 to the first bottom edge 112 and the distance from the connection between the first ground end 211 and the first body 11 to the first bottom edge 112. For details, please refer to Figure 5 and Figure 6 Description of related embodiments. The distance d between the end surface of the first free end 212 facing away from the first bottom edge 112 and the first bottom edge 112 is 11 Satisfaction:d 11 ≥89mm, the first grounding end 211 is connected to the first body 11 for grounding, and the distance d from the connection between the first grounding end 211 and the first body 11 to the first bottom edge 112 is 12 Satisfy: 30mm≤d 12 ≤75mm.

[0147] Accordingly, when the foldable electronic device 1 is in the folded state, whether the second radiator 22 is held is related to the position of the slit between the second radiator 22 and the second body 13 and the position of the ground return. Since the second radiator 22 and the second body 13 are opened to form the second free end 222 and the second ground end 221, whether the second radiator 22 is held is related to the distance from the end face of the second free end 222 away from the second bottom edge 132 to the second bottom edge 132 and the distance from the connection between the second ground end 221 and the second body 13 to the second bottom edge 132. For details, please refer to Figure 5 and Figure 6 Description of related embodiments. The distance d between the end surface of the second free end 222 away from the first bottom edge 112 and the second bottom edge 132 is 21 Satisfaction:d 21 ≥89mm, the second grounding end 221 is connected to the second body 13 with a base, and the distance d from the connection between the second grounding end 221 and the second body 13 to the second bottom edge 132 is 22 Satisfy: 30mm≤d 22 ≤75mm.

[0148] Please continue reading Fig.18 An implementation method provided Figure 3Schematic diagram of a partial structure of a foldable electronic device. The foldable electronic device 1 includes a foldable and conductively connected middle frame 80, and the middle frame 80 includes a first middle frame 50 and a second middle frame 60. The first middle frame 50 includes the first body 11 and a first frame 52 bent and connected to at least part of the periphery of the first body 11, and the first radiator 21 is located in the first frame 52. The second middle frame 60 includes the second body 13 and a second frame 62 bent and connected to at least part of the periphery of the second body 13, and the second radiator 22 is located in the second frame 62.

[0149] In this embodiment, the first radiator 21 is located in the first frame 52. In other words, part of the first frame 52 of the first middle frame 50 in the foldable electronic device 1 can be reused as the first radiator 21, so the foldable electronic device 1 can be made more compact. Specifically, the first frame 52 has a first slit 521, and the first body 11 has a second slit 522 adjacent to the first frame 52, and the second slit 522 is bent and connected to the first slit 521 and communicates.

[0150] In this embodiment, the second radiator 22 is located in the second frame 62. In other words, part of the second frame 62 of the second middle frame 60 in the foldable electronic device 1 can be reused as the second radiator 22, so the foldable electronic device 1 can be made more compact. Specifically, the second frame 62 has a third slit 621, and the second body 13 has a fourth slit 622 adjacent to the second frame 62, and the fourth slit 622 is bent and connected to the third slit 621 and communicates.

[0151] In one embodiment, when the foldable electronic device 1 is in a folded state, the first slit 521 is aligned with the third slit 621. It can be understood that in other embodiments, the first slit 521 and the third slit 621 are staggered.

[0152] It should be noted that the technical features of this embodiment are applicable to the embodiment described above in which the first radiator 21 is fed with the first excitation current through the first feeding point P1 and the second radiator 22 is fed with the second excitation current through the second feeding point P2, and is also applicable to the embodiment in which the second radiator 22 is coupled with the first radiator 21 to generate a coupling current when the foldable electronic device 1 is in a folded state.

[0153] The performance of the foldable electronic device 1 provided in each embodiment of the present application will be described below with reference to simulation diagrams.

[0154] Please combine Figure 7 and Figure 8 and Fig.18 It can be seen that when the foldable electronic device 1 is in a folded state and is held by the user with the right hand, the position of the gap between the first free end 212 and the first body 11 (i.e., the first gap 521) is located above the user's thumb, the position of the gap between the second free end 222 and the second body 13 (i.e., the third gap 621) is located above the user's thumb, and the first grounding end 211 is below the user's thumb, and the second grounding end 221 is below the user's thumb. When the foldable electronic device 1 is in a folded state and is held by the user with the left hand, the position of the gap between the first free end 212 and the first body 11 (i.e., the first gap 521) is located above the user's middle finger, the position of the gap between the second free end 222 and the second body 13 (i.e., the third gap 621) is located above the user's middle finger, and the first grounding end 211 is below the user's middle finger, and the second grounding end 221 is below the user's middle finger. In other words, when a user holds the foldable electronic device 1 in a folded state, the user can hold (ie, contact or touch) the first radiator 21 and the second radiator 22 .

[0155] See also Fig.19 , Fig.19 A schematic diagram of the S-parameter curve of the antenna assembly when the foldable electronic device provided in the related art is in a folded state and a schematic diagram of the parameter curve of the antenna assembly when the foldable electronic device provided in the embodiment of the present application is in a folded state. In this schematic diagram, the horizontal axis is frequency (Frequency), and the unit is GHz; the vertical axis is S parameters (S-Parameters), and the unit is dB. Among them, curve ① is a schematic diagram of the S-parameter curve of the antenna assembly 20 when the foldable electronic device 1 provided in the related art is in a folded state. The antenna assembly 20 in the foldable electronic device 1 in the related art only includes the first radiator 21, and does not include the second radiator 22. Curve ② is Fig.13The illustrated embodiment provides a schematic diagram of an S parameter curve of the antenna assembly 20 when the foldable electronic device 1 is in a folded state. In this embodiment, when the foldable electronic device 1 is in a folded state, the second radiator 22 is coupled with the first radiator 21 to generate a coupling current, and the second radiator 22 excites the second body 13 to generate a second current I2. As can be seen from curves ① and ②, the antenna assembly 20 has the second radiator 22. When the foldable electronic device 1 is in a folded state, the second radiator 22 acts as a parasitic branch of the first radiator 21. The reflection coefficient bandwidth of the antenna assembly 20 in the preset frequency band is wider than the bandwidth of the antenna assembly 20 provided by the related art, and there are two resonant modes, wherein the first resonant mode is generated by the first radiator 21, the second resonant mode is generated by the second radiator 22, and the first resonant mode ( Fig.19 The first resonance frequency is marked as resonance 1, and the second resonance mode ( Fig.19 The curve ③ is marked as resonance 2) having a second resonance frequency point, wherein the second resonance frequency point is greater than the first resonance frequency point. Figure 3 The illustrated embodiment provides a schematic diagram of an S parameter curve of the antenna assembly 20 when the foldable electronic device 1 is in a folded state. In this embodiment, when the foldable electronic device 1 is in a folded state, the first radiator 21 is fed with a first excitation signal through a first feeding point P1, and the second radiator 22 is fed with a second excitation signal through a second feeding point P2. The second excitation signal has the same frequency band and phase as the first excitation signal, and the simulation is performed by taking the first excitation signal and the second excitation signal being excited by the same feed source S as an example. As can be seen from curve ③, the feed source S can simultaneously excite the first radiator 21 and the second radiator 22, and the antenna assembly 20 has a resonant frequency point when supporting the target frequency band, and as can be seen from curves ① and ③, the reflection absorption bandwidth of the foldable electronic device 1 is widened when it is in a folded state.

[0156] See also Fig. 20 , Fig. 20A schematic diagram of the system efficiency of a foldable electronic device in a folded state provided by the related art and a schematic diagram of the system efficiency of a foldable electronic device in a folded state provided by an embodiment of the present application. In this schematic diagram, the horizontal axis is frequency (Frequency), and the unit is GHz; the vertical axis is system total efficiency (System Total Efficiency), and the unit is dB. Among them, curve ① is a schematic diagram of the S parameter curve of the antenna assembly 20 when the foldable electronic device 1 provided by the related art is in a folded state. The antenna assembly 20 in the foldable electronic device 1 in the related art only includes the first radiator 21, and does not include the second radiator 22. It can be seen from curve ① that the system total efficiency of the antenna assembly 20 in the preset frequency band in the related art is -8.8dB. Curve ② is a solution in which the antenna assembly 20 has the second radiator 22. When the foldable electronic device 1 is in a folded state, the second radiator 22 is used as a parasitic branch of the first radiator 21. The average total system efficiency is -7.3dB, which is 1.5dB higher than the total system efficiency of the antenna assembly 20 with only the first radiator 21 in the related art, which is -8.8dB. Curve ③ is a solution in which the foldable electronic device 1 is in a folded state, the first radiator 21 is fed with a first excitation signal through the first feeding point P1, and the second radiator 22 is fed with a second excitation signal through the second feeding point P2. The second excitation signal has the same frequency band and phase as the first excitation signal, and the first excitation signal and the second excitation signal are excited by the same feed source S. The total system efficiency of the antenna assembly 20 is optimal, with an average of -7.1dB, which is 1.7dB higher than the total system efficiency of the antenna assembly 20 with only the first radiator 21 in the related art, which is -8.8dB. Curve ③ is a schematic diagram of the total system efficiency curve of the antenna assembly 20 of the foldable electronic device 1 in free space; Curve ④ is a schematic diagram of the total system efficiency curve when the foldable electronic device 1 is held in the right hand compared to Curve ③; Curve ⑤ is a schematic diagram of the total system efficiency curve when the foldable electronic device 1 is held in the left hand compared to Curve ③. It can be seen from Curve ④ and Curve ⑤ that when the foldable electronic device 1 is in a folded state and the left hand holds the foldable electronic device 1, the average total system efficiency is -6.5dB, and when the foldable electronic device 1 is in a folded state and the left hand holds the foldable electronic device 1, the average total system efficiency of the right hand holding the foldable electronic device 1 is -6.4dB. It can be seen from Curve ③, Curve ④ and Curve ⑤ that when the user holds the foldable electronic device 1 in the right hand or the left hand, the performance is improved by more than 0.6dB compared to when the foldable electronic device 1 is in free space.

[0157] To summarize, in one embodiment, the foldable electronic device 1 provided in the embodiment of the present application feeds the first radiator 21 and the second radiator 22 in the antenna assembly 20 together, thereby maximally exciting the current of the first body 11 and the second body 13, and effectively improving the antenna performance of the foldable electronic device 1 in a folded state.

[0158] In addition, in one embodiment, the first radiator 21 and the second radiator 22 are fed by the same feed source S, that is, the first radiator 21 and the second radiator 22 in the antenna assembly 20 utilize a common feeding design to maximize the current of the first body 11 and the second body 13, thereby effectively improving the antenna performance of the foldable electronic device 1 in a folded state.

[0159] In one embodiment, when the foldable electronic device 1 includes a foldable and conductively connected metal middle frame, for example, a first middle frame 50 and a second middle frame 60, the first middle frame 50 includes the first body 11 and a first frame 52 bent and connected to at least a portion of the periphery of the first body 11, and the first radiator 21 is located at the first frame 52; the second middle frame 60 includes the second body 13 and a second frame 62 bent and connected to at least a portion of the periphery of the second body 13, and the second radiator 22 is located at the second frame 62. The first radiator 21 and the second radiator 22 in the antenna assembly 20 are fed together to maximize the current of the first body 11 and the second body 13 as parts of the metal middle frame, thereby effectively improving the antenna performance of the foldable electronic device 1 in a folded state.

[0160] In addition, in one embodiment, when the foldable electronic device 1 is in a folded state, the second radiator 22 is used as a parasitic branch (auxiliary branch) of the first radiator 21. When the foldable electronic device 1 is in a folded state, it is possible to stimulate current in the first body 11 and the second body 13 which are parts of the metal middle frame, thereby effectively improving the antenna performance of the foldable electronic device 1 in a folded state.

[0161] In addition, in one embodiment, based on the innovative features of the above embodiment, the positions of the first free end 212 and the first ground end 211, the positions of the second free end 222 and the second ground end 221 are determined. When the first radiator 21 is located at the first frame 52 and the second radiator is located at the second frame 62, the positions of the antenna slots (the first slot 521, the second slot 522, the third slot 621 and the fourth slot 622) can be determined, so that when the foldable electronic device 1 is in a folded state and when the user holds the foldable electronic device 1, the first free end 212 ( That is, the first gap 521) and the second free end 222 (that is, the second gap 522) are located above the thumb and middle finger of the user, and the first grounding end 211 and the second grounding end 221 are below the thumb and the middle finger. Therefore, when the user holds the foldable electronic device 1 in a foldable state, the user's hand can hold the first radiator 21 and the second radiator 22, and the first radiator 21 and the second radiator 22 can effectively stimulate the user (for example, the user's fingers), thereby achieving that the hand-held performance of the foldable electronic device 1 in the folded state is better than that of the free space.

[0162] The above is part of the 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. A foldable electronic device, characterized in that: The foldable electronic device comprises a foldable body and an antenna assembly, wherein the foldable body comprises a first body and a second body which are foldable and conductively connected, so that the foldable electronic device can be in a folded state and an unfolded state; the antenna assembly comprises: A first radiator, the first radiator is disposed on the first body, the first radiator has a first grounding end, a first feeding point and a first free end, the first grounding end is grounded, and the first feeding point is used to receive a first excitation signal; and A second radiator, the second radiator is disposed on the second body, the second radiator has a second grounding end and a second free end, and the second grounding end is grounded; When the foldable electronic device is in a folded state: the first excitation signal excites the first body to generate a first current through the first radiator, and the second radiator excites the second body to generate a second current, wherein the direction of the second current is the same as the direction of the first current, and the first current and the second current are both used to support the target frequency band.

2. The foldable electronic device according to claim 1, characterized in that: The first body and the second body can be relatively folded along a folding axis. When the foldable electronic device is in an unfolded state, the first radiator and the second radiator are respectively located on two sides opposite to the folding axis; when the foldable electronic device is in a folded state, the first radiator and the second radiator are both located on the same side of the folding axis. The second radiator has a second feeding point, and the second feeding point is used to receive a second excitation signal. The second excitation signal excites the second body to generate the second current through the second radiator, wherein the second excitation signal has the same frequency band and the same phase as the first excitation signal.

3. The foldable electronic device according to claim 2, characterized in that: The direction in which the first ground end of the first radiator points to the first free end is a first opening direction, and the direction in which the second ground end of the first radiator points to the second free end is a second opening direction, wherein the second opening direction is the same as the first opening direction.

4. The foldable electronic device according to claim 3, characterized in that: When the foldable electronic device is in an unfolded state: the first body includes a first side edge disposed opposite to the second body and away from the folding axis, and a first bottom edge bent and connected to the first side edge, the first radiator is disposed adjacent to the first side edge, and the first free end is away from the first bottom edge compared to the first ground end; When the foldable electronic device is in an unfolded state: the second body includes a second side edge arranged opposite to the first body and away from the folding axis, and a second bottom edge bent and connected to the second side edge, the second radiator is arranged adjacent to the second side edge, and the second free end is away from the second bottom edge compared to the second ground end.

5. The foldable electronic device according to claim 4, characterized in that: The distance d between the end surface of the first free end facing away from the first bottom edge and the first bottom edge 11 Satisfaction:d 11 ≥89mm, the first grounding end is connected to the first body to be grounded, and the distance d from the connection between the first grounding end and the first body to the first bottom edge is 12 Satisfy: 30mm≤d 12 ≤75mm; The distance d between the end surface of the second free end facing away from the second bottom edge and the second bottom edge 21 Satisfaction:d 21 ≥89mm, the second grounding end is connected to the second body to be grounded, and the distance d from the connection between the second grounding end and the second body to the second bottom edge is 22 Satisfy: 30mm≤d 22 ≤75mm.

6. The foldable electronic device according to claim 4, characterized in that: When the foldable electronic device is in a folded state: the first current is in the same extension direction as the first side, and the second current is in the same extension direction as the second side.

7. The foldable electronic device according to claim 1, characterized in that: When the foldable electronic device is in an unfolded state: the first body includes a first side edge disposed opposite to the second body, and a first top edge bent and connected to the first side edge, the first radiator is located at the first top edge, and the first free end is closer to the second body than the first ground end, the second body includes a second side edge disposed opposite to the first body, and a second top edge bent and connected to the first side edge, the second radiator is located at the second top edge, and the second free end is closer to the first body than the second ground end; The second radiator has a second feeding point, and the second feeding point is used to receive a second excitation signal; When the foldable electronic device is in an unfolded state: the second excitation signal has the same frequency band as the first excitation signal, and the phase difference is 180°; when the foldable electronic device is in a folded state: the second excitation signal has the same frequency band as the first excitation signal, and the phase difference is 180°, so that the first excitation signal generates the first current through the first body, and the second excitation signal generates the second current through the second body.

8. The foldable electronic device according to claim 7, characterized in that: When the foldable electronic device is in a folded state: the first current and the first top edge extend in the same direction, and the second current and the second top edge extend in the same direction.

9. A foldable electronic device as described in claim 2 or 7, when a user's hand holds the foldable electronic device in a folded state and contacts at least one of the first radiator and the second radiator, the at least one is used to stimulate the user's hand holding the foldable electronic device.

10. The foldable electronic device according to claim 2 or 7, characterized in that: The antenna assembly further comprises: A feed source, the feed source is used to generate an original excitation signal, the original excitation signal has an original phase; a first matching branch, one end of which is electrically connected to the feed source to receive the original excitation signal, and the other end of which is electrically connected to the first feeding point, the first matching branch being used to match the output impedance of the feed source with the input impedance of the first radiator and output the first excitation signal, wherein the first excitation signal has a first phase; and A second matching branch, one end of the second matching branch is electrically connected to the feed source to receive the original excitation signal, and the other end is electrically connected to the second feeding point, the second matching branch is used to match the output impedance of the feed source with the input impedance of the second radiator, and output the second excitation signal, wherein the second excitation signal has a second phase, and the second phase is the same as the first phase.

11. The foldable electronic device according to claim 10, characterized in that: The first matching branch comprises: a first matching circuit, wherein an input end of the first matching circuit is electrically connected to the feed source; a first transmission line, one end of the first transmission line being electrically connected to an output end of the first matching circuit; and a second matching circuit, wherein an input end of the second matching circuit is electrically connected to the other end of the first transmission line, an output end of the second matching circuit is electrically connected to the first feeding point, and the second matching circuit, the first transmission line and the first matching circuit jointly act on the original excitation signal to obtain the first excitation signal; The second matching branch comprises: the first matching circuit; a second transmission line, one end of the second transmission line being electrically connected to an output end of the first matching circuit; and A third matching circuit, wherein an input end of the third matching circuit is electrically connected to the other end of the second transmission line, and the third matching circuit, the second transmission line and the first matching circuit jointly act on the original excitation signal to obtain the second excitation signal.

12. The foldable electronic device according to claim 1, wherein: The antenna assembly further comprises: A feed source, the feed source being electrically connected to the first feeding point, and the feed source being used to generate the first excitation signal; When the foldable electronic device is in a folded state: the second radiator is coupled with the first radiator to generate a coupling current, and the second radiator excites the second body to generate the second current.

13. The foldable electronic device according to claim 12, characterized in that: When the foldable electronic device is in a folded state: the first radiator generates a first resonance mode, and the first resonance mode is a quarter wavelength mode of the target frequency band; the second radiator generates a second resonance mode, and the second resonance mode is a quarter wavelength mode of the target frequency band.

14. The foldable electronic device according to claim 13, characterized in that: The first resonance mode has a first resonance frequency point, and the second resonance mode has a second resonance frequency point, wherein the second resonance frequency point is greater than the first resonance frequency point.

15. The foldable electronic device according to claim 14, characterized in that: The electrical length of the second radiator is smaller than the electrical length of the first radiator.

16. The foldable electronic device according to claim 14, characterized in that: A difference f0 between the second resonant frequency point and the first resonant frequency point satisfies: 70 MHz≤f0≤130 MHz.

17. The foldable electronic device according to claim 1, wherein: The first radiator has a first end surface facing away from the first body, and the second radiator has a second end surface facing away from the second body; When the foldable electronic device is in a folded state: the first radiator generates a first electric field perpendicular to the first end surface, and the second radiator has a second electric field perpendicular to the second end surface.

18. The foldable electronic device according to claim 1, wherein: The foldable electronic device includes a first middle frame and a second middle frame that are foldable and conductively connected, the first middle frame includes the first body and a first frame that is bent and connected to at least a portion of the periphery of the first body, and the first radiator is located at the first frame; the second middle frame includes the second body and a second frame that is bent and connected to at least a portion of the periphery of the second body, and the second radiator is located at the second frame.

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