Foldable electronic device

Abstract

The invention provides a foldable electronic device. The foldable electronic equipment comprises a foldable main body and an antenna assembly, the foldable main body comprises a first main body and a second main body which can be folded along a folding axis, the first main body is provided with a first free edge deviating from the folding axis, and the second main body is provided with a second free edge deviating from the folding axis; the antenna assembly comprises a first antenna and a second antenna. The first antenna comprises a first radiator and a first feed source which are electrically connected, the first radiator is arranged corresponding to the first free edge, and the first feed source electrically excites the first radiator to support a first frequency band for communicating with a satellite; the second antenna comprises a second radiator and a second feed source which are electrically connected, the second radiator is arranged corresponding to the second free edge, and the second feed source excites the second radiator to support a second frequency band of cellular communication; when the foldable electronic device is in a folded state, the first radiator and the second radiator are at least partially stacked and coupled, and the second radiator is also used as a parasitic branch of the first antenna to support the first 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, when an electronic device is folded, the performance of some antennas is seriously degraded, 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 foldable along a folding axis, so that the foldable electronic device is in a folded state and an unfolded state, wherein the first body has a first free edge away from the folding axis, and the second body has a second free edge away from the folding axis; the antenna assembly comprises:

[0004] A first antenna includes a first radiator and a first feed source, wherein the first radiator is arranged corresponding to the first free edge, the first radiator has a first feed point, and the first feed source is electrically connected to the first feed point to excite the first radiator to support a first frequency band for communicating with a satellite; and

[0005] A second antenna, comprising a second radiator and a second feed source, wherein the second radiator is arranged corresponding to the second free edge, the second radiator has a second feed point, and the second feed source is electrically connected to the second feed point to excite the second radiator to support a second frequency band of cellular communication;

[0006] When the foldable electronic device is in a folded state, the second radiator is at least partially stacked and coupled with the first radiator, and the second radiator also serves as a parasitic branch of the first antenna to support the first frequency band.

[0007] In summary, the first radiator in the foldable electronic device provided in the embodiment of the present application is arranged corresponding to the first free edge, and the second radiator is arranged corresponding to the second free edge. When the foldable electronic device is in the unfolded state, the user usually grasps the side of the foldable electronic device between the first free edge and the second free edge, while avoiding the first free edge and the second free edge. Therefore, when the foldable electronic device is in the unfolded state, the first radiator and the second radiator are usually not blocked by the user's hand. Therefore, when the foldable electronic device is in the unfolded state, the first antenna and the second antenna both have good communication effects.

[0008] When the foldable electronic device is in a folded state, when the user holds the foldable electronic device with his hand, he usually holds the side of the middle part of the electronic device and avoids the first free edge and the second free edge. Therefore, when the foldable electronic device is in a folded state, the first radiator and the second radiator are usually not blocked by the user's hand. Therefore, when the foldable electronic device is in a folded state, the first antenna and the second antenna both have good communication effects.

[0009] In addition, in the foldable electronic device provided in this embodiment, when the foldable electronic device is in a folded state, the second radiator is coupled with the first radiator, and supports the first frequency band as a parasitic branch of the first antenna, thereby improving the bandwidth and efficiency of the first frequency band. Therefore, the foldable electronic device has better antenna performance when in a folded state. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0011] Figure 1 A schematic diagram of some components of a foldable electronic device in the related art in an unfolded state;

[0012] Figure 2 A schematic diagram of a foldable electronic device in a folded state in the related art;

[0013] Figure 3 A schematic diagram of the structure of a foldable electronic device provided in an embodiment of the present application;

[0014] Figure 4 is a schematic diagram of a partially disassembled structure of a foldable electronic device provided in an embodiment of the present application;

[0015] Figure 5 A schematic diagram of a structure in which a first body and a second body of a foldable electronic device provided in an embodiment of the present application are rotated and folded;

[0016] Figure 6 A schematic diagram of a portion of the structure of a foldable electronic device in an unfolded state provided by an embodiment of the present application;

[0017] Figure 7 for Figure 6 A schematic diagram of a three-dimensional structure of a foldable electronic device when a partial structure thereof is in a folded state;

[0018] Figure 8 for Figure 6 A side view of a partial structure of a foldable electronic device provided in the embodiment of the present invention when the foldable electronic device is in a folded state;

[0019] Fig. 9 for Figure 7 A schematic diagram of a first resonant current of a first radiator and a second resonant current of a second radiator when the foldable electronic device shown in FIG. 1 is in a folded state;

[0020] Figure 10-Figure 17 Schematic diagrams of matching sub-circuits in the first matching circuit provided in various embodiments;

[0021] Fig.18 for Figure 6 A schematic diagram of the physical length of the first radiator and the physical length of the second radiator shown;

[0022] Fig.19 A schematic diagram of a foldable electronic device provided in another embodiment of the present application;

[0023] Fig. 20 A schematic diagram of a portion of the structure of a foldable electronic device in an unfolded state provided by another embodiment of the present application;

[0024] Fig.21 A schematic diagram of a portion of the structure of a foldable electronic device in an unfolded state provided by another embodiment of the present application;

[0025] Fig. 22 A schematic diagram of a foldable electronic device provided in one embodiment of the present application;

[0026] Fig.23 A schematic diagram of a foldable electronic device provided in yet another embodiment of the present application;

[0027] Fig.24 for Fig.23 A schematic diagram of a specific circuit of a foldable electronic device provided in;

[0028] Fig.25 for Figure 6 Schematic diagram of S parameters and total system efficiency of foldable electronic devices shown;

[0029] Fig.26 for Fig.24 A schematic diagram of the structure of a foldable electronic device shown;

[0030] Fig. 27 A schematic diagram of the structure of a foldable electronic device provided in one embodiment of the present application;

[0031] Fig.28 A circuit diagram of a foldable electronic device provided in one embodiment;

[0032] Fig.29 A schematic diagram of S parameters and total system efficiency of a foldable electronic device in a folded state in a first frequency band provided by an embodiment of the present application;

[0033] Fig.30 A schematic diagram of the proportion of the upper hemisphere in the first frequency band when the foldable electronic device is in an unfolded state;

[0034] Fig.31 A schematic diagram of the S parameters and total system efficiency of the foldable electronic device in the second frequency band;

[0035] Fig.32 It is a schematic diagram of an S parameter curve of a foldable electronic device in an unfolded state and a folded state when not adopting the embodiments of the present application, and an S parameter curve of a foldable electronic device in a folded state when adopting the embodiments of the present application;

[0036] Fig.33 It is a schematic diagram of an S parameter curve of a foldable electronic device in an unfolded state and a folded state when not adopting the embodiment of the present application, and a schematic diagram of a system total efficiency curve of a foldable electronic device in a folded state when adopting the embodiment of the present application;

[0037] Fig.34 This is a schematic diagram of the upper hemisphere proportion in the first frequency band when the foldable electronic device is in a folded state.

[0038] Description of main component numbers:

[0039] Foldable electronic device 1, foldable body 10, antenna assembly 20, camera module 30, housing 40, main display screen 50, auxiliary display screen 60, processor 70;

[0040] First body 110, electrical connector 120, first free edge 111, first connecting edge 112, first side edge 113, second side edge 114, second body 130, second free edge 131, second connecting edge 132, third side edge 133, fourth side edge 134, coupling gap 11a, coupling gap 11b;

[0041] A first antenna 210, a second antenna 220, a third antenna 230, and an NFC antenna 240;

[0042] A first radiator 211, a first ground terminal 2111, a first free terminal 2112, a first feeding point P1, a first feed source S1, a first matching circuit M1, a first DC blocking capacitor C11, a first isolation inductor L11, a first impedance matching branch 2115, a main radiator 221a, and a parasitic radiator 221b;

[0043] A second radiator 221, a second ground end 2211, a second free end 2212, a free end portion 2213, a second feeding point P2, a second feed source S2, a second matching circuit M2, and a second DC blocking capacitor C12;

[0044] A third radiator 231, a third ground terminal 2311, a third free end 2312, a third feeding point P3, a third feed source S3, a third matching circuit M3, a second isolation inductor L12, and a second impedance matching branch 235;

[0045] A third DC blocking capacitor C3 and a fourth DC blocking capacitor C4;

[0046] A first shell 41, a second shell 42, a first fixing portion 510, a bending portion 520, and a second fixing portion 530;

[0047] The first resonant current I1 and the second resonant current I2. DETAILED DESCRIPTION

[0048] 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.

[0049] 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.

[0050] 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.

[0051] In order to facilitate understanding of the beneficial effects of the foldable electronic device 1 provided by the relevant embodiments of the present application, the foldable electronic device 1 provided in the relevant technology (not the prior art) is first introduced. It can be understood that the foldable electronic device 1 provided in the relevant technology should not be understood as the prior art. Please refer to Figure 1 and Figure 2 , Figure 1 A schematic diagram of some components of a foldable electronic device in the related art in an unfolded state;

[0052] Figure 2 It is a schematic diagram of a foldable electronic device in the related art in a folded state. The foldable electronic device 1 includes a foldable body 10 and an antenna assembly 20. The foldable body 10 includes a first body 110 and a second body 130 that can be folded along a folding axis L, so that the foldable electronic device 1 is in a folded state and an unfolded state. The first body 110 has a first free edge 111 that is away from the folding axis L, and the first body 110 also has a first side edge 113 that is bent and connected to the first free edge 111. The second body 130 has a second free edge 131 that is away from the folding axis L. Generally speaking, the first free edge 111 is the top edge of the foldable electronic device 1, and the second free edge 131 is the bottom edge of the foldable electronic device 1. The antenna assembly 20 includes a first antenna 210, the first antenna 210 includes a first radiator 211 and a first feed source S1, the first radiator 211 is arranged corresponding to the first side 113 and adjacent to the first free edge 111, and the first feed source S1 is electrically connected to the first radiator 211 to stimulate the first radiator 211 to support a first frequency band for communicating with a satellite. In this embodiment, the first side 113 is taken as the right side of the first body 110 as an example for illustration, and the first frequency band is taken as the GPS-L5 frequency band as an example for illustration, which can be understood that it should not be understood as a limitation on the embodiments of the present application.

[0053] In the foldable electronic device 1 provided in the implementation in the related art, the foldable electronic device 1 further includes a secondary display screen 60 . In other implementations, there is no limitation on whether the foldable electronic device 1 includes the secondary display screen 60 .

[0054] When the foldable electronic device 1 is in the unfolded state, the user holds the foldable electronic device 1 with his hand, and usually does not hold it and block the first antenna 210, whether holding it with the right hand or the left hand. When the foldable electronic device 1 is in the folded state, the length of the entire foldable electronic device 1 is reduced by half or nearly half. When the foldable electronic device 1 is in the folded state, the top view of the entire foldable electronic device 1 is a rectangle or approximately a rectangle. When the foldable electronic device 1 is in the folded state, when the user holds the foldable electronic device 1, the first antenna 210 is usually blocked. For example, when holding it with the right hand, the fingers of the right hand will touch the foldable electronic device 1 and block the first antenna 210; when holding it with the left hand, the base of the left hand may block the first antenna 210, making the performance of the first antenna 210 in the first frequency band poor (this is called holding the first antenna 210). In addition, when the foldable electronic device 1 is in the folded state, the main ground (also called the main floor, or the main ground pole) is halved or approximately halved compared to the main ground when the foldable electronic device 1 is in the unfolded state, resulting in a greater decrease in the efficiency of the first antenna 210 when supporting the first frequency band. It can be seen that when the foldable electronic device 1 is in the folded state and held by the user, the antenna performance of the first antenna 210 decreases by 15dB to 20dB.

[0055] It can be seen that when the foldable electronic device 1 provided in the related art is in a folded state, the antenna performance of the first antenna 210 is relatively poor.

[0056] Next, the foldable electronic device 1 provided in the embodiment of the present application is introduced in detail.

[0057] See also Figure 3 and Figure 4 , Figure 3 A schematic diagram of the structure of a foldable electronic device provided in an embodiment of the present application; Figure 4 1 is a schematic diagram of a partially disassembled structure of a foldable electronic device provided in an embodiment of the present application. The foldable electronic device 1 includes but is not limited to a mobile phone, a tablet computer, a laptop computer, a computer, a wearable device, a drone, and other devices with communication functions and capable of being folded or unfolded. The present embodiment of the application is described using a mobile phone as an example, and other electronic devices may refer to this embodiment.

[0058] 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. 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.

[0059] The foldable electronic device 1 includes a foldable body 10 and an antenna assembly 20 . The foldable body 10 includes a first body 110 and a second body 130 foldable along a folding axis L, so that the foldable electronic device 1 is in a folded state and an unfolded state.

[0060] The following is an example of the environment in which the antenna assembly 20 of the foldable electronic device 1, the foldable body 10, etc. is located with reference to the accompanying drawings.

[0061] See also Figure 4 , the foldable electronic device 1 also includes a shell 40. The shell 40 includes a first shell 41 and a second shell 42. The first shell 41 is covered on the outside of the first body 110, and the second shell 42 is covered on the outside of the second body 130. Among them, each shell 40 includes a bottom plate (also called a back cover) and a frame surrounding the periphery of the bottom plate. The bottom plate and the frame around the periphery include a receiving space. Among them, the radiator of the antenna assembly 20 (at least one of the first radiator 211 or the second radiator 221 described later) can be a part of the frame. Among them, the first body 110 is arranged on the bottom plate of the first shell 41 (contained in the first shell 41), and the second body 130 is arranged on the bottom plate of the second shell 42 (contained in the second shell 42). The receiving space is also used to accommodate devices such as a floor, a camera module 30, a receiver module, a battery, and various sensors. The material of the foldable body 10 is a metal conductive material. The present application is not limited to the shapes of the first body 110 and the second body 130. Optionally, the first body 110 may be substantially rectangular, and the second body 130 may be substantially rectangular, and their shapes are not specifically limited, including but not limited to rectangular, square, irregular, etc. The foldable body 10 is provided with through holes, notches, grooves, etc. to accommodate devices.

[0062] The present application does not make any specific limitation on the foldable body 10. Optionally, the foldable body 10 includes but is not limited to a middle plate inside the middle frame of the foldable electronic device 1. The middle plate is used to carry circuit boards, form receiving slots for receiving electronic devices, avoid gaps, etc. The middle plate can be made of metal, or non-metal, or a combination of metal and non-metal. When the middle plate is made of metal, such as magnesium-aluminum alloy, the middle plate can also be used as a reference ground system for the foldable electronic device 1.

[0063] In other embodiments, the floor and the frame are separate structures, and the middle plate and the frame are interconnected and integrated.

[0064] The foldable body 10 includes a folded state or an unfolded state. In the folded state, the first body 110 and the second body 130 are superimposed in the thickness direction (Z-axis direction), specifically, along the Z-axis direction, the first body 110 and the second body 130 are respectively arranged in the upper and lower layers. The unfolded state is that the first body 110 is translated from the folded state to the overlap area between the first body 110 and the second body 130 is less than the preset area, and the preset area is, for example, 20%, 15%, 10%, 5%, 1%, 0% of the area of ​​the first body 110. The unfolded state can also be that the first body 110 is flipped from the folded state to the overlap area between the first body 110 and the second body 130 is less than the preset area, and the preset area is, for example, 20%, 15%, 10%, 5%, 1%, 0% of the area of ​​the first body 110. The foldable electronic device 1 includes but is not limited to a foldable mobile phone. In this embodiment, the state of the foldable body 10 is the same as the state of the foldable electronic device 1. When the foldable body 10 is in a folded state, the foldable electronic device 1 is in a folded state; correspondingly, when the foldable body 10 is in an unfolded state, the foldable electronic device 1 is in a folded state. In the schematic diagram of this embodiment, the foldable body 10 includes a first body 110 and a second body 130 that are foldable along a folding axis L.

[0065] See also Figure 5 , Figure 5 A schematic diagram of the structure of the first body and the second body rotating and folding in the foldable electronic device provided in the embodiment of the present application. The first body 110 and the second body 130 are connected to each other by a rotating shaft. The axial direction of the rotating shaft is the X-axis direction. The first body 110 and / or the second body 130 rotate around the rotating shaft to a folded state or an unfolded state. The first body 110 is located at Figure 5 The solid line in the middle is in the folded state, and the first body 110 is located at Figure 5 The dotted line in the middle indicates the expanded state.

[0066] The embodiment of the present application is described by taking the rotational connection between the first body 110 and the second body 130 as an example.

[0067] See also Figure 4 , the foldable electronic device 1 also includes a main display screen 50. The main display screen 50 can be but is not limited to a flexible display screen. The main display screen 50 is arranged 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 main display screen 50). The main display screen 50 includes a first fixing portion 510, a bending portion 520, and a second fixing portion 530 arranged in sequence. The first fixing portion 510 is fixedly connected to the first shell 41, and the second fixing portion 530 is fixedly connected to the second shell 42, and the fixing method thereof includes but is not limited to gluing, etc. The bending portion 520 is arranged on the rotating connection mechanism, and the connection method between the two can be a fixed connection or a non-connected state. The bending portion 520 bends when the foldable electronic device 1 is used, and its shape when bent includes but is not limited to a water drop shape or a U shape.

[0068] Please also read Figure 6 , Figure 7 and Figure 8 , Figure 6 A schematic diagram of a portion of the structure of a foldable electronic device in an unfolded state provided by an embodiment of the present application; Figure 7 for Figure 6 A schematic diagram of a three-dimensional structure of a foldable electronic device when a partial structure thereof is in a folded state; Figure 8 for Figure 6 A side view of a partial structure of a foldable electronic device provided in the embodiment of the present invention when in a folded state. The first body 110 has a first free edge 111 away from the folding axis L, and the second body 130 has a second free edge 131 away from the folding axis L. The antenna assembly 20 includes a first antenna 210 and a second antenna 220. The first antenna 210 includes a first radiator 211 and a first feed source S1. The first radiator 211 is arranged corresponding to the first free edge 111, the first radiator 211 has a first feed point P1, and the first feed source S1 is electrically connected to the first feed point P1 to excite the first radiator 211 to support a first frequency band for communication with a satellite. The second antenna 220 includes a second radiator 221 and a second feed source S2. The second radiator 221 is arranged corresponding to the second free edge 131, the second radiator 221 has a second feed point P2, and the second feed source S2 is electrically connected to the second feed point P2 to excite the second radiator 221 to support a second frequency band for cellular communication. When the foldable electronic device 1 is in a folded state, the second radiator 221 is at least partially stacked and coupled with the first radiator 211, and the second radiator 221 also serves as a parasitic branch of the first antenna 210 to support the first frequency band.

[0069] See also Figure 6 The first body 110 includes a first connecting edge 112 and a first free edge 111 that are disposed opposite to each other. The first body 110 is substantially rectangular. The first connecting edge 112 and the first free edge 111 are edges at two ends along the Y-axis direction. The first body 110 also includes a first side edge 113 and a second side edge 114 that are disposed opposite to each other and are both connected between the first free edge 111 and the first connecting edge 112. The first side edge 113 and the second side edge 114 are edges at two ends along the X-axis direction.

[0070] See also Figure 6 The second body 130 includes a second connecting edge 132 and a second free edge 131 that are disposed opposite to each other. The second body 130 is substantially rectangular. The second connecting edge 132 and the second free edge 131 are edges at two ends along the Y-axis direction, respectively. The second body 130 also includes a third side edge 133 and a fourth side edge 134 that are disposed opposite to each other and are both connected between the second free edge 131 and the second connecting edge 132. The third side edge 133 and the fourth side edge 134 are edges at two ends along the X-axis direction, respectively.

[0071] See also Figure 6 , the first body 110 and the second body 130 are both conductive parts. That is, the first body 110 and the second body 130 are both conductive structures. When the first body 110 and the second body 130 are folded, the first body 110 and the second body 130 are arranged opposite to each other. The first body 110 and the second body 130 are similar to two similar conductive plate structures.

[0072] In one embodiment, the first connecting edge 112 and the second connecting edge 132 are rotatably electrically connected via an electrical connector 120. When the first body 110 is folded relative to the second body 130, the first body 110 and the second body 130 are folded in half. The first free edge 111 and the second free edge 131 are aligned with each other and spaced apart. In other words, the lengths of the first body 110 and the second body 130 in the Y-axis direction are similar or the same.

[0073] See also Figure 6 When the foldable electronic device 1 is in the unfolded state, the first side edge 113 and the third side edge 133 are arranged in a collinear or approximately collinear manner, and the second side edge 114 and the fourth side edge 134 are arranged in a collinear or approximately collinear manner. When the foldable electronic device 1 is in the folded state, the first side edge 113 and the third side edge 133 are aligned and spaced apart; the second side edge 114 and the fourth side edge 134 are aligned and spaced apart, and the first free edge 111 and the second free edge 131 are aligned and spaced apart.

[0074] In the schematic diagram of this embodiment, the first radiator 211 is disposed on one side of the first free edge 111, and the second radiator 221 is disposed on one side of the second free edge 131. When the foldable electronic device 1 is in the unfolded state, the first radiator 211 is located at the top of the foldable body 10, and the second radiator 221 is located at the bottom of the foldable body 10. It can be understood that as the foldable electronic device 1 is placed in different postures, the position of the first radiator 211 relative to the foldable body 10 also changes, and the position of the second radiator 221 relative to the foldable body 10 also changes.

[0075] The first radiator 211 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 211 can be a structural antenna (Mechanical Design Antenna, MDA) radiator designed using the metal embedding of the foldable electronic device 1 itself. For example, the first radiator 211 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 211 can also be a radiator of a metal frame antenna designed with a metal middle frame.

[0076] It is understandable that the present application does not specifically limit the shape, structure and material of the first radiator 211, and the shapes of the first radiator 211 include but are not limited to bent, straight, L-shaped, sheet-shaped, rod-shaped, coated, thin film, etc. When the first radiator 211 is in a strip shape, the present application does not limit the extension track of the first radiator 211, so the first radiator 211 can be extended in a straight line, a curve, a multi-stage bend, etc. The first radiator 211 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.

[0077] The first feed source S1 may be electrically connected to the first feed point P1 by, but is not limited to, direct electrical connection (such as welding) or indirect electrical connection to the first feed point P1 by coaxial line, microstrip line, conductive spring, conductive glue, etc.

[0078] The second radiator 221 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 221 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 221 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 221 can also be a radiator of a metal frame antenna designed with a metal middle frame.

[0079] It is understandable that the present application does not specifically limit the shape, structure and material of the second radiator 221. The shapes of the second radiator 221 include but are not limited to bent, straight, L-shaped, sheet-shaped, rod-shaped, coated, thin film, etc. When the second radiator 221 is in a strip shape, the present application does not limit the extension trajectory of the second radiator 221, so the second radiator 221 can extend in a straight line, a curve, a multi-stage bend, etc. The second radiator 221 can be a line with uniform width on the extension trajectory, or it can be an irregular shape with different widths such as a gradual width and a widened area. The second radiator 221 can be made of the same or different materials as the first radiator 211, and the embodiments of the present application do not limit this.

[0080] In the foldable electronic device 1 provided in the embodiment of the present application, when the foldable electronic device 1 is in a folded state, the second radiator 221 is at least partially stacked with the first radiator 211, and the second radiator 221 is spaced apart from the first radiator 211 to form a coupling gap 11a, and the second radiator 221 can be coupled with the first radiator 211 through the coupling gap 11a. When the second radiator 221 is coupled with the first radiator 211, the second radiator 221 also serves as a parasitic branch of the first antenna 210 to support the first frequency band.

[0081] For example, the size W of the coupling slot 11a may be, but is not limited to, 0.5 mm, 1.0 mm, 1.5 mm, 2.0 mm, 2.5 mm, 3.0 mm, 3.5 mm, or 4.0 mm. When the foldable electronic device 1 is in a folded state, in the direction from the first body 110 to the second body 130, the size W of the coupling slot 11a satisfies: 0.5 mm ≤ W ≤ 4.0 mm, so that the second radiator 221 can better couple the energy of the first radiator 211, and has a better coupling effect, thereby enabling the second radiator 221 to have better antenna performance when supporting the first frequency band.

[0082] In one implementation, the first frequency band is the GPS-L5 frequency band (the resonance frequency is 1176 MHz), and the second frequency band is a lower frequency band (Lower Band, LB), and the frequency of the lower frequency band is less than 1000 MHz.

[0083] When the foldable electronic device 1 is in a folded state, when the user's hand holds the foldable electronic device 1, the user usually holds the side of the middle of the electronic device, avoiding the first free edge 111 and the second free edge 131. Therefore, when the foldable electronic device 1 is in a folded state, the first radiator 211 and the second radiator 221 are usually not blocked by the user's hand. In other words, the foldable electronic device 1 is not easily held tightly by the user's hand when it is in a folded state, thereby providing manual efficiency. Therefore, when the foldable electronic device 1 is in a folded state, the first antenna 210 and the second antenna 220 both have good communication effects.

[0084] In addition, when the foldable electronic device 1 provided in the embodiment of the present application is in a folded state, the second radiator 221 also serves as a parasitic branch of the first radiator 211 to support the first frequency band. Therefore, the antenna assembly 20 of the foldable electronic device 1 has higher bandwidth and efficiency when supporting the first frequency band.

[0085] In summary, the first radiator 211 in the foldable electronic device 1 provided in the embodiment of the present application is arranged corresponding to the first free edge 111, and the second radiator 221 is arranged corresponding to the second free edge 131. When the foldable electronic device 1 is in the unfolded state, the user usually grasps the side of the foldable electronic device 1 between the first free edge 111 and the second free edge 131, while avoiding the first free edge 111 and the second free edge 131. Therefore, when the foldable electronic device 1 is in the unfolded state, the first radiator 211 and the second radiator 221 are usually not blocked by the user's hand. Therefore, when the foldable electronic device 1 is in the unfolded state, the first antenna 210 and the second antenna 220 both have good communication effects.

[0086] When the foldable electronic device 1 is in a folded state, when the user holds the foldable electronic device 1 with his hand, he usually holds the side of the middle part of the electronic device and avoids the first free edge 111 and the second free edge 131. Therefore, when the foldable electronic device 1 is in a folded state, the first radiator 211 and the second radiator 221 are usually not blocked by the user's hand. Therefore, when the foldable electronic device 1 is in a folded state, the first antenna 210 and the second antenna 220 both have good communication effects.

[0087] In addition, in the foldable electronic device 1 provided in this embodiment, when the foldable electronic device 1 is in a folded state, the second radiator 221 is coupled with the first radiator 211, and supports the first frequency band as a parasitic branch of the first antenna 210, thereby improving the bandwidth and efficiency of the first frequency band. Therefore, the foldable electronic device 1 has better antenna performance when in a folded state.

[0088] The specific structure of the first radiator 211 is described in detail below. Figure 6 , the first radiator 211 also has a first grounding end 2111 and a first free end 2112. The first grounding end 2111 is grounded, and the first feeding point P1 is located between the first grounding end 2111 and the first free end 2112. The second radiator 221 also has a second grounding end 2211 and a second free end 2212. The second grounding end 2211 is grounded, and the second feeding point P2 is located between the second grounding end 2211 and the second free end 2212. The direction from the second grounding end 2211 to the second free end 2212 is opposite to the direction from the first grounding end 2111 to the first free end 2112.

[0089] The first ground terminal 2111 is electrically connected to the ground of the foldable electronic device 1 to ground the first ground terminal 2111. The grounding of the first ground terminal 2111 includes but is not limited to the following embodiments. The way in which the first ground terminal 2111 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 110 is a conductive component that can constitute a ground, so the first ground terminal 2111 is electrically connected to the first body 110 to be grounded.

[0090] The second grounding terminal 2211 is electrically connected to the ground of the foldable electronic device 1 to ground the second grounding terminal 2211. The grounding of the second grounding terminal 2211 includes but is not limited to the following embodiments. The way in which the second grounding terminal 2211 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 130 is a conductive component that can constitute a ground, so the second grounding terminal 2211 is electrically connected to the second body 130 to be grounded.

[0091] In the schematic diagram of the present embodiment, the first grounding end 2111 of the first radiator 211 is located on the left, and the first free end 2112 is located on the right. The direction in which the first grounding end 2111 points to the first free end 2112 is rightward. In other words, the opening of the first radiator 211 is rightward. Correspondingly, in the schematic diagram of the present embodiment, the second grounding end 2211 of the second radiator 221 is located on the right, and the second free end 2212 is located on the left. The direction in which the second grounding end 2211 points to the second free end 2212 is leftward. In other words, the opening of the second radiator 221 is leftward. It can be understood that in other embodiments, the opening of the first radiator 211 is leftward, and the opening of the second radiator 221 is rightward. In summary, the opening of the first radiator 211 is oriented in a preset direction, and the opening of the second radiator 221 is in the opposite direction of the preset direction.

[0092] In the foldable electronic device 1 provided in this embodiment, the direction from the second ground end 2211 to the second free end 2212 is opposite to the direction from the first ground end 2111 to the first free end 2112, so that when the foldable electronic device 1 is in a folded state, the second radiator 221 is coupled with the first radiator 211 and it is convenient to excite a resonant current on the second radiator 221 to support the first frequency band. Thus, the antenna assembly 20 has a higher bandwidth and efficiency in the first frequency band.

[0093] When the first radiator 211 supports the first frequency band, the first radiator 211 is excited to generate a first resonance mode, wherein the first resonance mode is a quarter wavelength mode from the first ground end 2111 to the first free end 2112. When the foldable electronic device 1 is in a folded state, the second radiator 221 is excited to generate a second resonance mode to support the first frequency band, wherein the second resonance mode is a quarter wavelength mode from the second free end 2212 to the second ground end 2211.

[0094] It should be noted that the "wavelength" in the "quarter wavelength mode" in "the first resonance mode is a quarter wavelength mode from the first ground end 2111 to the first free end 2112" refers to the wavelength corresponding to the center frequency of the first frequency band. The quarter wavelength mode is also called the fundamental mode, and the first resonance mode is a quarter wavelength mode from the first ground end 2111 to the first free end 2112, that is, the first radiator 211 works in the fundamental mode when supporting the first frequency band. When the first radiator 211 supports the first frequency band, it works in the fundamental mode, so the first radiator 211 has better radiation efficiency when supporting the first frequency band.

[0095] It should be noted that the wavelength of the "quarter wavelength mode" mentioned in "the second resonant mode is a quarter wavelength mode from the second free end 2212 to the second ground end 2211" refers to the wavelength corresponding to the center frequency of the first frequency band. The second resonant mode is a quarter wavelength mode from the second free end 2212 to the second ground end 2211, that is, the second radiator 221 works in the fundamental mode when supporting the first frequency band. When the second radiator 221 supports the first frequency band, it works in the fundamental mode. Therefore, when the foldable electronic device 1 is in the folded state, the second radiator 221 has better radiation efficiency when supporting the first frequency band as a parasitic branch of the first radiator 211.

[0096] See also Fig. 9 , Fig. 9 for Figure 7Schematic diagram of the first resonant current of the first radiator and the second resonant current of the second radiator when the foldable electronic device is in a folded state. When the foldable electronic device 1 is in a folded state, the first radiator 211 is excited to generate the first resonant current I1 to support the first frequency band. The second radiator 221 is excited to generate the second resonant current I2 to support the first frequency band, wherein the flow direction of the second resonant current I2 is the same as the flow direction of the first resonant current I1.

[0097] In this embodiment, the direction of the first resonant current I1 is represented by a dotted line, and the direction of the second resonant current I2 is represented by a dotted line. Since the second resonant current I2 on the second radiator 221 has the same flow direction as the first resonant current I1 of the first radiator 211, it can be seen that the first resonant current I1 and the second resonant current I2 jointly support the first frequency band. Therefore, the antenna assembly 20 has a wider bandwidth and higher efficiency when supporting the first frequency band, that is, the antenna performance of the antenna assembly 20 when supporting the first frequency band is better.

[0098] See also Figure 6 The first antenna 210 further includes a first matching circuit M1. The first feed source S1 electrically connects the first matching circuit M1 to the second radiator 221, and the first matching circuit M1 is used to adjust the equivalent electrical length of the first radiator 211.

[0099] In one embodiment, the first matching circuit M1 includes a switch and a matching device (also referred to as a matching subcircuit). The matching device may be, but is not limited to, at least one of a variable capacitor or an inductor. For example, in one embodiment, the first matching circuit M1 may include a switch and a variable capacitor, etc.; in another embodiment, the first matching circuit M1 may include a switch, a variable capacitor or an inductor, etc.

[0100] Please also read Figures 10 to 17 , Figure 10-Figure 17 Schematic diagrams of matching sub-circuits in the first matching circuit provided for various embodiments. The matching sub-circuit 620 in the first matching circuit M1 includes one or more of the following circuits.

[0101] Please also read Fig.10 ,exist Fig.10 In the embodiment, the matching sub-circuit 620 includes a band-pass circuit formed by connecting the inductor L0 and the capacitor C0 in series.

[0102] Please also read Fig.11 ,exist Fig.11 In the embodiment, the matching sub-circuit 620 includes a band-stop circuit formed by connecting an inductor L0 and a capacitor C0 in parallel.

[0103] See also Fig.12 ,exist Fig.12 In the embodiment, the matching subcircuit 620 includes an inductor L0, a first capacitor C1, and a second capacitor C2. The inductor L0 is connected in parallel with the first capacitor C1, and the second capacitor C2 is electrically connected to a node where the inductor L0 and the first capacitor C1 are electrically connected.

[0104] Please also read Fig.13 ,exist Fig.13 In the embodiment, the matching subcircuit 620 includes a capacitor C0, a first inductor L1, and a second inductor L2. The capacitor C0 is connected in parallel with the first inductor L1, and the second inductor L2 is electrically connected to a node where the capacitor C0 and the first inductor L1 are electrically connected.

[0105] Please also read Fig.14 ,exist Fig.14 In the embodiment, the matching subcircuit 620 includes an inductor L0, a first capacitor C1, and a second capacitor C2. The inductor L0 is connected in series with the first capacitor C1, and one end of the second capacitor C2 is electrically connected to the first end of the inductor L0 that is not connected to the first capacitor C1, and the other end of the second capacitor C2 is electrically connected to the end of the first capacitor C1 that is not connected to the inductor L0.

[0106] Please also read Fig.15 ,exist Fig.15 In the embodiment, the matching subcircuit 620 includes a capacitor C0, a first inductor L1, and a second inductor L2. The capacitor C0 is connected in series with the first inductor L1, one end of the second inductor L2 is electrically connected to an end of the capacitor C0 that is not connected to the first inductor L1, and the other end of the second inductor L2 is electrically connected to an end of the first inductor L1 that is not connected to the capacitor C0.

[0107] Please also read Fig.16 ,exist Fig.16 In the embodiment, the matching subcircuit 620 includes a first capacitor C1, a second capacitor C2, a first inductor L1, and a second inductor L2. The first capacitor C1 is connected in parallel with the first inductor L1, the second capacitor C2 is connected in parallel with the second inductor L2, and one end of the whole formed by the second capacitor C2 and the second inductor L2 in parallel is electrically connected to one end of the whole formed by the first capacitor C1 and the first inductor L1 in parallel.

[0108] Please also read Fig.17 ,exist Fig.17In the embodiment, the matching subcircuit 620 includes a first capacitor C1, a second capacitor C2, a first inductor L1, and a second inductor L2. The first capacitor C1 and the first inductor L1 are connected in series to form a first unit 113b. The second capacitor C2 and the second inductor L2 are connected in series to form a second unit 113c. The first unit 113b and the second unit 113c are connected in parallel.

[0109] See also Figure 6 The second antenna 220 further includes a second matching circuit M2 . The second feed source S2 electrically connects the second matching circuit M2 to the second radiator 221 . The second matching circuit M2 is used to adjust the equivalent electrical length of the second radiator 221 .

[0110] In one embodiment, the second matching circuit M2 includes a switch and a matching device (also referred to as a matching subcircuit). The matching device may be, but is not limited to, at least one of a variable capacitor or an inductor. For example, in one embodiment, the second matching circuit M2 may include a switch and a variable capacitor, etc.; in another embodiment, the second matching circuit M2 may include a switch, a variable capacitor or an inductor, etc. The switch in the second matching circuit M2 changes the state of the switch to realize that different matching devices are electrically connected to the second radiator 221, so that the switching of each frequency band in the LB frequency band can be realized, and the foldable electronic device 1 has little or no effect on supporting the first frequency band as a parasitic branch when it is in the folded state, that is, the switch has no effect on the second radiator 221 as a parasitic branch of the first radiator 211 and thus on the enhancement of the first frequency band.

[0111] The matching sub-circuit 620 in the second matching circuit M2 includes Fig.10 to- Fig.17 For details, please refer to Figure 10-Figure 17 The matching sub-circuit in the second matching circuit M2 may be the same as or different from the matching sub-circuit in the first matching circuit M1.

[0112] See also Fig.18 , Fig.18 for Figure 6A schematic diagram of the physical length of the first radiator and the physical length of the second radiator is shown. The resonant frequency of the first frequency band is greater than the resonant frequency of the second frequency band. The physical length of the first radiator 211 is a first length La, and the physical length of the second radiator 221 is a second length Lb, wherein Lb>La; and the second antenna 220 further includes a second matching circuit M2, the second feed source S2 electrically connects the second matching circuit M2 to the second radiator 221, and the second matching circuit M2 is used to adjust the equivalent electrical length of the second radiator 221.

[0113] In an antenna, the equivalent electrical length of a radiator is related to the frequency band supported by the radiator. Generally speaking, the higher the frequency band supported by the radiator, the lower the equivalent electrical length of the radiator; correspondingly, the lower the frequency band supported by the radiator, the longer the equivalent electrical length of the radiator. The equivalent electrical length of the radiator is related to the physical length of the radiator and the matching circuit electrically connected to the radiator.

[0114] In the implementation mode of the present application, since the resonant frequency of the first frequency band is greater than the resonant frequency of the second frequency band, the frequency of the first frequency band is higher and the frequency of the second frequency band is lower. Therefore, the equivalent electrical length of the first radiator 211 is less than the equivalent electrical length of the second radiator 221. In this implementation mode, Lb>La, so that when the foldable electronic device 1 is in the folded state, the second radiator 221 is more matched with the first frequency band supported by the second radiator 221, so that the first frequency band supported by the second radiator 221 has better antenna performance.

[0115] See also Fig.19 , Fig.19 A schematic diagram of a foldable electronic device provided in another embodiment of the present application. The first radiator 211 also has a first grounding end 2111 and a first free end 2112, the first grounding end 2111 is grounded, and the first feeding point P1 is located between the first grounding end 2111 and the first free end 2112. The second radiator 221 also has a free end 2213 that is disposed opposite to the second free end 2212. The second grounding end 2211 and the second feeding point P2 are both located between the second free end 2212 and the free end 2213, and the second grounding end 2211 is adjacent to the free end 2213, and the second feeding point P2 is adjacent to the second free end 2212.

[0116] In this embodiment, since the second radiator 221 has two free ends arranged opposite to each other, namely, the second free end 2212 and the free end 2213, and the second ground end 2211 and the second feeding point P2 are both located between the second free end 2212 and the free end 2213, the structure of the second radiator 221 is called a T-shaped radiator.

[0117] See also Fig. 20 , Fig. 20 A partial structural schematic diagram of a foldable electronic device in an unfolded state provided in another embodiment of the present application. The first radiator 211 also has a first grounding terminal 2111 and a first free end 2112. The first grounding terminal 2111 is grounded, and the first feeding point P1 is located between the first grounding terminal 2111 and the first free end 2112. The antenna assembly 20 also includes a third antenna 230. The third antenna 230 includes a third radiator 231 and a third feed source S3. The third radiator 231 is arranged corresponding to the first free edge 111, and the third radiator 231 includes a third grounding terminal 2311, a third feeding point P3 and a third free end 2312. The third grounding terminal 2311 is grounded and connected to the first grounding terminal 2111, and the third feed source S3 is electrically connected to the third feeding point P3 and excites the third radiator 231 with a third frequency band.

[0118] The third radiator 231 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 third radiator 231 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 third radiator 231 can be an antenna radiator designed using the middle frame formed by plastic and metal of the foldable electronic device 1. In addition, the third radiator 231 can also be a radiator of a metal frame antenna designed with a metal middle frame.

[0119] It is understandable that the present application does not specifically limit the shape, structure and material of the third radiator 231, and the shapes of the third radiator 231 include but are not limited to bent, straight, L-shaped, sheet-shaped, rod-shaped, coated, thin film, etc. When the third radiator 231 is in a strip shape, the present application does not limit the extension track of the third radiator 231, so the third radiator 231 can be extended in a straight line, a curve, a multi-stage bend, etc. The third radiator 231 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.

[0120] In this embodiment, the third radiator 231 and the first radiator 211 are an integral structure.

[0121] The way in which the third feed source S3 is electrically connected to the third feeding point P3 may be, but is not limited to, direct electrical connection (such as welding) or indirect electrical connection to the third feeding point P3 via a coaxial line, a microstrip line, a conductive spring, a conductive adhesive, etc.

[0122] The third ground terminal 2311 is electrically connected to the ground of the foldable electronic device 1 to ground the third ground terminal 2311. The grounding of the third ground terminal 2311 includes but is not limited to the following embodiments. The way in which the third ground terminal 2311 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 110 is a conductive component that can constitute a ground, so the third ground terminal 2311 is electrically connected to the first body 110 to be grounded.

[0123] In one embodiment, the third frequency band is a GPS-L1 frequency band for communicating with a satellite, wherein a resonant frequency point of the GPS-L1 frequency band is 1575 GHz, or the third frequency band is a low frequency band.

[0124] Please continue reading Fig. 20 The first grounding terminal 2111 has a first grounding point G1, and the first grounding terminal 2111 is grounded through the first grounding point G1. The third grounding terminal 2311 has a second grounding point G2, and the third grounding terminal 2311 is grounded through the second grounding point G2, and the first grounding point G1 is spaced from the second grounding point G2.

[0125] The first grounding end 2111 is grounded through the first grounding point G1, and the second grounding end 2211 is grounded through the second grounding point G2. Therefore, the first radiator 211 can be fully grounded, and the third radiator 231 can be fully grounded, and the interference of the first frequency band supported by the first radiator 211 with the third frequency band supported by the third radiator 231 can be reduced or even avoided. In addition, the interference of the third frequency band supported by the third radiator 231 with the first frequency band supported by the first radiator 211 can be reduced or even avoided, thereby making the foldable electronic device 1 have better antenna performance in both the first frequency band and the third frequency band.

[0126] It can be understood that in other embodiments, the foldable electronic device 1 satisfies: the first grounding terminal 2111 is grounded through the first grounding point G1, or the second grounding terminal 2211 is grounded through the second grounding point G2. In other embodiments, the foldable electronic device 1 satisfies: the first grounding terminal 2111 is grounded through one or more first grounding points G1; the third grounding terminal 2311 is grounded through one or more second grounding points G2. The foldable electronic device 1 provided in the embodiment of the present application does not limit the number of first grounding points G1 of the first grounding terminal 2111, and the number of second grounding points G2 of the third grounding terminal 2311.

[0127] Please continue reading Fig. 20 The first body 110 has a first side 113 and a second side 114 disposed opposite to each other. The first side 113 and the second side 114 are respectively connected to the first free edge 111 by bending. The second body 130 has a third side 133 and a fourth side 134 disposed opposite to each other, and the third side 133 and the fourth side 134 are respectively connected to the second free edge 131 by bending. When the foldable electronic device 1 is in an unfolded state, the third side 133 and the first side 113 are located on the same side of the foldable electronic device 1, and the second side 114 and the fourth side 134 are located on the same side of the foldable electronic device 1. The first radiator 211 is disposed adjacent to the first side 113 compared to the third radiator 231, and the second radiator 221 is disposed adjacent to the third side 133.

[0128] The first side 113 , the second side 114 , the third side 133 , and the fourth side 134 are described above and will not be described again.

[0129] Compared with the third radiator 231, the first radiator 211 is arranged adjacent to the first side 113, and the second radiator 221 is arranged adjacent to the third side 133. Therefore, when the foldable electronic device 1 is in a folded state, the second radiator 221 and the first radiator 211 have a larger portion facing each other, thereby making the coupling effect between the second radiator 221 and the first radiator 211 better, and further making the second radiator 221 better support the first frequency band when the foldable electronic device 1 is in a foldable state, and the antenna assembly 20 has better antenna performance in the first frequency band.

[0130] See also Fig.21 , Fig.21 A partial structural schematic diagram of a foldable electronic device in an unfolded state provided in another embodiment of the present application. In this embodiment, the first radiator 211 also has a first grounding end 2111 and a first free end 2112. The first grounding end 2111 is grounded, and the first feeding point P1 is located between the first grounding end 2111 and the first free end 2112. The antenna assembly 20 also includes a third antenna 230. The third antenna 230 includes a third radiator 231 and a third feed source S3. The third radiator 231 is arranged corresponding to the first free edge 111, and the third radiator 231 includes a third grounding end 2311, a third feeding point P3 and a third free end 2312. The third grounding end 2311 is grounded and connected to the first grounding end 2111, and the third feed source S3 is electrically connected to the third feeding point P3 and excites the third radiator 231 to support a third frequency band.

[0131] The second radiator 221 further has a free end 2213 disposed opposite to the second free end 2212. The second ground end 2211 and the second feeding point P2 are both located between the second free end 2212 and the free end 2213, and the second ground end 2211 is adjacent to the free end 2213, and the second feeding point P2 is adjacent to the second free end 2212.

[0132] See also Fig. 22 , Fig. 22A schematic diagram of a foldable electronic device provided in one embodiment of the present application. The first body 110 has a first side 113 and a second side 114 disposed opposite to each other. The first side 113 and the second side 114 are respectively connected to the first free edge 111 by bending. The second body 130 has a third side 133 and a fourth side 134 disposed opposite to each other. The third side 133 and the fourth side 134 are respectively connected to the second free edge 131 by bending. When the foldable electronic device 1 is in an unfolded state, the third side 133 and the first side 113 are located on the same side of the foldable electronic device 1, and the second side 114 and the fourth side 134 are located on the same side of the foldable electronic device 1. The first radiator 211 is disposed adjacent to the second side 114 compared to the third radiator 231, the second radiator 221 includes a main radiator 221a and a parasitic radiator 221b, the main radiator 221a is electrically connected to the second feed source S2, and the second radiator 221 is adjacent to the third side 133 compared to the parasitic radiator 221b, a coupling gap 221c is provided between the parasitic radiator 221b and the main radiator 221a, the parasitic radiator 221b is coupled to the main radiator 221a through the coupling gap 221c, and the parasitic radiator 221b is adjacent to the fourth side 134 compared to the main radiator 221a. When the foldable electronic device 1 is in a folded state, the parasitic radiator 221b is coupled to the first radiator 211, and the parasitic radiator 221b serves as a parasitic branch of the first antenna 210.

[0133] The first side 113 , the second side 114 , the third side 133 , and the fourth side 134 are described above and will not be described again.

[0134] In this embodiment, the first radiator 211 is arranged adjacent to the second side 114 compared to the third radiator 231, and the parasitic branches of the second radiator 221 are adjacent to the fourth side 134 compared to the main radiating branches. Therefore, when the foldable electronic device 1 is in a folded state, more parasitic branches of the first radiator 211 and the second radiator 221 are directly facing each other, so that the coupling effect between the technical branches of the first radiator 211 and the second radiator 221 is better, and further, when the foldable electronic device 1 is in a foldable state, the second radiator 221 can better support the first frequency band, and the antenna assembly 20 has better antenna performance in the first frequency band.

[0135] See also Fig.23 , Fig.23A schematic diagram of a foldable electronic device provided in another embodiment of the present application. The antenna assembly 20 further includes a Near Field Communication (NFC) antenna. The NFC antenna 240 further includes an NFC feed source S4, which is electrically connected to the first feed point P1 and the third feed point P3, so that the first radiator 211 and the third radiator 231 also support the NFC frequency band.

[0136] In this embodiment, the NFC feed source S4 is electrically connected to the first feeding point P1 and the third feeding point P3, so the first radiator 211 and the third radiator 231 are used together as radiators supporting the NFC frequency band, so that the NFC antenna 240 shares the first radiator 211 of the first antenna 210 and the third radiator 231 of the third antenna 230 as radiators. Compared with the NFC antenna 240 not sharing the first radiator 211 of the first antenna 210 and the third radiator 231 of the third antenna 230 as radiators, the foldable electronic device 1 in the embodiment of the present application can realize the reuse of radiators, reduce the occupied space of the antenna assembly 20 in the foldable electronic device 1, and is conducive to the thinness of the foldable electronic device 1.

[0137] The NFC antenna 240 can be used for swiping bus cards, subway cards, access control, elevators and other scenarios. In the implementation of the present application, the NFC antenna 240 can be a non-coil NFC antenna 240. When the first radiator 211 and the third radiator 231 are flexible printed circuit (FPC) radiators, the NFC antenna 240 can be an ordinary flexible printed circuit (FPC) radiator. It can be understood that the present application does not limit the structural form of the second radiator 221, and the above examples should not be understood as limitations on the implementation of the present application.

[0138] It can be seen that the antenna assembly 20 can not only reuse the first radiator 211 of the first antenna 210 to support the NFC frequency band, but also reuse the first radiator 211 of the third antenna 230 to support the NFC frequency band, so that the size of the radiator supporting the NFC frequency band in the antenna assembly 20 can be larger, and the area of ​​the NFC radiator can be expanded, so that the antenna assembly 20 can communicate with other NFC antennas 240 with higher efficiency, and the NFC performance in some scenarios can be improved, so that the antenna assembly 20 is more conducive to wide application in electronics. In the related art, the radiator of the NFC antenna 240 usually includes a coil and a ferrite arranged in a stacked manner, which is relatively large in size and relatively high in cost. Therefore, when the size of the radiator supporting the NFC frequency band required as a whole is certain, the first radiator 211131 and the third radiator 231 of the foldable electronic device 1 provided in the embodiment of the present application also support the NFC frequency band, which is conducive to reducing the area of ​​the NFC radiator, thereby making the size of the antenna assembly 20 smaller and the cost lower.

[0139] See also Fig.23 The first antenna 210 further includes a first DC blocking capacitor C11, one end of which is electrically connected to the first ground terminal 2111, and the other end of which is grounded. The third antenna 230 further includes a second DC blocking capacitor C12, one end of which is electrically connected to the third ground terminal 2311, and the other end of which is grounded.

[0140] One end of the first DC blocking capacitor C11 is electrically connected to the first grounding terminal 2111, and the other end of the first DC blocking capacitor C11 is grounded. In other words, the first grounding terminal 2111 is grounded through the first DC blocking capacitor C11. Correspondingly, one end of the second DC blocking capacitor C12 is electrically connected to the third grounding terminal 2311, and the other end of the second DC blocking capacitor C12 is grounded. In other words, the third grounding terminal 2311 is grounded through the second DC blocking capacitor C12.

[0141] Since the frequency of the NFC frequency band is relatively low, the current in the NFC frequency band is approximately equivalent to a direct current, and the first DC blocking capacitor C11 is equivalent to an open circuit for the NFC frequency band, that is, the first DC blocking capacitor C11 is a DC blocking capacitor for the NFC frequency band; and the first DC blocking capacitor C11 is equivalent to a path for the first frequency band supported by the first radiator 211, that is, the first DC blocking capacitor C11 has little or no effect on the first frequency band supported by the first radiator 211.

[0142] Correspondingly, since the frequency of the NFC frequency band is relatively low, the current in the NFC frequency band can be approximately equivalent to a direct current, and the second DC blocking capacitor C12 is equivalent to an open circuit for the NFC frequency band, that is, the second DC blocking capacitor C12 is a DC blocking capacitor for the NFC frequency band; and the second DC blocking capacitor C12 is equivalent to a path for the third frequency band supported by the third radiator 231, that is, the second DC blocking capacitor C12 has little or no effect on the third frequency band supported by the third radiator 231.

[0143] It can be seen that, since the first ground terminal 2111 is grounded through the first DC blocking capacitor C11, the resonant current corresponding to the NFC frequency band excited by the NFC antenna 240 on the first radiator 211 will not go to the ground at the first ground terminal 2111; accordingly, since the third ground terminal 2311 is grounded through the second DC blocking capacitor C12, the resonant current corresponding to the NFC frequency band excited by the NFC antenna 240 on the third radiator 231 will not go to the ground at the third ground terminal 2311. It can be seen that the current of the NFC antenna 240 can utilize the first radiator 211 and the second radiator 221, that is, it has a longer radiation branch, so the NFC antenna 240 has better antenna performance.

[0144] The following describes in detail the specific details of the first matching circuit M1 and the NFC antenna 240 in the foldable electronic device 1. Fig.24 , Fig.24 for Fig.23 A schematic diagram of a specific circuit of a foldable electronic device provided in . The first matching circuit M1 includes a first isolation inductor L11 and a first impedance matching branch 2115. One end of the first isolation inductor L11 is electrically connected to the first feeding point P1, and the first feed source S1 is electrically connected to the first impedance matching branch 2115 to the first feeding point P1. The NFC antenna 240 also includes a third DC blocking capacitor C13, one end of the third DC blocking capacitor C13 is electrically connected to the other end of the first isolation inductor L11, the other end of the third DC blocking capacitor C13 is grounded, and the NFC feed source S4 is electrically connected to the one end of the third DC blocking capacitor C13.

[0145] The first isolation inductor L11 is used to isolate the NFC signal from the signal of the first frequency band. Specifically, the first isolation inductor L11 is equivalent to an open circuit for the first frequency band. Therefore, the first isolation inductor L11 can reduce or even avoid the influence of the NFC antenna 240 on the first antenna 210, so as to reduce or even avoid the influence of the signal of the NFC frequency band on the signal of the first frequency band, so that the antenna assembly 20 can not only work in the first frequency band and the NFC frequency band, but also has good communication performance in the first frequency band and the NFC frequency band.

[0146] The first isolation inductor L11 may satisfy at least one of the following conditions: a single inductor; a plurality of inductors connected in series; a plurality of inductors connected in parallel, etc., which are not limited here.

[0147] The first impedance matching branch 2115 is used to match the output impedance of the first feed source S1 with the input impedance of the first radiator 211, so that the first antenna 210 has a higher radiation efficiency in the first frequency band.

[0148] The electrical connection method of the third DC blocking capacitor C13 in the embodiment of the present application can improve the antenna performance of the NFC antenna 240. Specifically, the third DC blocking capacitor C13 can prevent the NFC feed source S4 from being directly grounded, so that the antenna assembly 20 can not only operate in the first frequency band and the NFC frequency band, but also have good communication performance in the NFC frequency band and the first frequency band.

[0149] Please continue reading Fig.24 The third antenna 230 further includes a third matching circuit M3. The third matching circuit M3 includes a second isolation inductor L12 and a second impedance matching branch 235, one end of the second isolation inductor L12 is electrically connected to the third feeding point P3, and the third feed source S3 is electrically connected to the second impedance matching branch 235 to the third feeding point P3.

[0150] The NFC antenna 240 further includes a fourth DC blocking capacitor C14, one end of the fourth DC blocking capacitor C14 is connected to the other end of the second isolation inductor L12, the other end of the fourth DC blocking capacitor C14 is grounded, and the NFC feed source S4 is also electrically connected to the one end of the fourth DC blocking capacitor C14.

[0151] The second isolation inductor L12 is used to isolate the NFC signal from the signal of the third frequency band. Specifically, the second isolation inductor L12 is equivalent to an open circuit for the third frequency band. Therefore, the second isolation inductor L12 can reduce or even avoid the influence of the NFC antenna 240 on the third antenna 230, so as to reduce or even avoid the influence of the signal of the NFC frequency band on the signal of the third frequency band, so that the antenna assembly 20 can not only work in the first frequency band and the NFC frequency band, but also have good communication performance in the third frequency band and the NFC frequency band.

[0152] The second isolation inductor L12 may satisfy at least one of the following conditions: a single inductor; a plurality of inductors connected in series; a plurality of inductors connected in parallel, etc., which are not limited here.

[0153] The second impedance matching branch 235 is used to match the output impedance of the third feed source S3 with the input impedance of the third radiator 231, so that the third antenna 230 has a higher radiation efficiency in the third frequency band.

[0154] The electrical connection method of the fourth DC blocking capacitor C14 in the embodiment of the present application can improve the antenna performance of the NFC antenna 240. Specifically, the fourth DC blocking capacitor C14 can prevent the NFC feed source S4 from being directly grounded, so that the antenna assembly 20 can not only operate in the third frequency band and the NFC frequency band, but also have better communication performance in the NFC frequency band and the third frequency band.

[0155] For further information, see Fig.25 , Fig.25 for Figure 6The schematic diagram of S parameters and system total efficiency of the foldable electronic device shown. Wherein, the horizontal axis is frequency, the unit is GHz, and the vertical axis is dB. Wherein, curve ① is the S1,1 curve of the first antenna 210, and curve ② is the system efficiency (System Tot. Efficiency) of the antenna assembly 20. The first feed source S1 is also used to excite the first radiator 211 to support the fourth frequency band, wherein the resonant frequency of the fourth frequency band is greater than the resonant frequency of the first frequency band. The fourth frequency band can be but is not limited to the N78 frequency band, or the WIFI2.4 frequency band, or the MHB frequency band, etc. It can be seen from curve ① that the S1,1 curve has two resonant frequencies, wherein the coordinates at the position marked as 1 are (1.176, -9.2927), and the corresponding frequency band is the GPS-L5 frequency band; the left side of the position marked as 2 is (3.452, -6.6936), and the corresponding frequency band is the N78 frequency band. It can be understood that the fourth frequency band in curve ① is the N78 frequency band, which should not be understood as a limitation on the frequency band supported by the first antenna 210 in the antenna assembly 20 in the foldable electronic device 1 provided in the embodiment of the present application. Point 1 in the S1,1 curve corresponds to the first resonant mode to support the first frequency band, and point 2 in the S1,1 curve corresponds to the third resonant mode to support the fourth frequency band. It can be seen from curve ② that the antenna assembly 20 has a good overall system efficiency in both the first frequency band and the fourth frequency band.

[0156] Further, point 1 in the S1,1 curve corresponds to the first resonant mode, that is, when the first radiator 211 supports the first frequency band, it is a quarter-wavelength mode from the first grounding point G1 of the first radiator 211 to the first free end 2112; point 2 in the S1,1 curve corresponds to the third resonant mode, that is, when the first radiator 211 supports the fourth frequency band, the first radiator 211 is excited to generate a third resonant mode, wherein the third resonant mode is a quarter-wavelength mode from the first feed source S1 to the first free end 2112.

[0157] It should be noted that the "wavelength" in the "quarter wavelength mode" in "the third resonance mode is a quarter wavelength mode from the first feed source S1 to the first free end 2112" refers to the wavelength corresponding to the center frequency of the fourth frequency band. The quarter wavelength mode is also called the fundamental mode, and the third resonance mode is the quarter wavelength mode from the first feed source S1 to the first free end 2112, that is, the first radiator 211 works in the fundamental mode when supporting the fourth frequency band. When the first radiator 211 supports the fourth frequency band, it works in the fundamental mode, so the first radiator 211 has better radiation efficiency when supporting the fourth frequency band.

[0158] See also Fig.24 and Fig.26 , Fig.26 for Fig.24 The foldable electronic device 1 further comprises a camera module 30 . The camera module 30 is arranged corresponding to the first body 110 and adjacent to the NFC antenna 240 .

[0159] The camera module 30 is usually arranged corresponding to the top of the foldable electronic device 1. In this embodiment, the camera module 30 is arranged corresponding to the first body 110, so the first body 110 can be regarded as the upper half of the foldable electronic device 1. When the foldable electronic device 1 is in the unfolded state, the end of the first body 110 away from the second body 130 can be regarded as the top of the foldable electronic device 1. The first radiator 211 and the third radiator 231 are arranged on one side of the first free edge 111, so the first radiator 211 and the third radiator 231 are equivalent to being arranged at the top of the foldable electronic device 1. The NFC antenna 240 uses the first radiator 211 and the third radiator 231 as the radiator of the NFC antenna 240, so the radiator of the NFC antenna 240 is also arranged at the top of the foldable electronic device 1. When the user uses the NFC antenna 240 to swipe a bus card, subway card, access control, elevator, etc., the upper part of the foldable electronic device 1 can be aligned with the card swiping area of ​​the bus card, subway card, access control, elevator, etc. to swipe the card, thereby better adapting to the card swiping scenario of the NFC antenna 240.

[0160] In another embodiment, the camera module 30 is arranged corresponding to the second body 130, and when the user uses the foldable electronic device 1, the end of the second body 130 away from the first body 110 is the top of the foldable electronic device 1, and the NFC antenna 240 is arranged at the bottom of the foldable electronic device 1. Usually, when the user uses the foldable electronic device 1, the end where the camera module 30 is located is usually located at the top, and when the user uses the NFC antenna 240 for swiping bus cards, subway cards, access control, elevators, etc., it is necessary to align the bottom of the NFC antenna 240 with the swiping position of the bus card, subway card, access control, elevator, etc. to swipe the card.

[0161] Please combine Fig.24 Also see Fig. 27 , Fig. 27 A schematic diagram of the structure of a foldable electronic device provided in one embodiment of the present application; wherein: Fig. 27 (a) is a schematic diagram of a foldable electronic device in an unfolded state provided by an embodiment of the present application; Fig. 27 (b) in Fig. 27(a) in the figure provides a schematic diagram of a foldable electronic device in a folded state. The first body 110 also has a first side 113, and the first side 113 is bent and connected to the first free edge 111. The foldable electronic device 1 also includes a main display screen 50 and a secondary display screen 60. The main display screen 50 is arranged on one side of the foldable body 10 and corresponds to the first body 110 and the second body 130. The secondary display screen 60 is arranged on the other side of the foldable body 10 and corresponds to the first body 110, and the secondary display screen 60 is arranged opposite to the main display screen 50, and the secondary display screen 60 is arranged adjacent to the first side 113. In this embodiment, the secondary display screen 60 is arranged on the side of the first shell 41 in the shell 40 away from the main display screen 50 as an example for illustration, which can be understood that it should not constitute a limitation on the embodiments of the present application.

[0162] The main display screen 50 is provided corresponding to the first body 110 and the second body 130. When the foldable electronic device 1 is in the unfolded state, the main display screen 50 can be fully exposed for user use. The main display screen 50 usually has a large display area and is more convenient to use.

[0163] In this embodiment, the display area of ​​the secondary display screen 60 is smaller than the display area of ​​the main display screen 50, and the secondary display screen 60 is only provided corresponding to the first body 110. The secondary display screen 60 is provided corresponding to the first body 110, and the secondary display screen 60 is provided corresponding to the first side 113, which can facilitate the operation of the secondary display screen 60 when the foldable electronic device 1 is held by the user in the folded state. It can be understood that in other embodiments, the secondary display screen 60 also has a larger display area, for example, the secondary display screen 60 can be provided corresponding to the first body 110 and the second body 130.

[0164] Further, in this embodiment, the distance from the auxiliary display screen 60 to the first side edge 113 is a first distance d1, and the distance from the auxiliary display screen 60 to the first free edge 111 is a second distance d2, wherein d2>d1.

[0165] In this embodiment, d2>d1, therefore, the auxiliary display screen 60 is farther away from the first free edge 111, and therefore, the auxiliary display screen 60 has less impact on the first antenna 210, and the first antenna 210 has a larger clearance, so that the first antenna 210 has better antenna performance.

[0166] For further information, see Fig.28 , Fig.28The circuit diagram of a foldable electronic device provided in one embodiment is shown in FIG. 1 . The foldable electronic device 1 further includes a processor 70. When the foldable electronic device 1 is in a folded state, the secondary display screen 60 is exposed, and the processor 70 controls the secondary display screen 60 to display a map navigation interface and use the first antenna 210 for navigation.

[0167] In this embodiment, when the foldable electronic device 1 is in the folded state, the processor 70 controls the secondary display screen 60 to display a map navigation interface, so that the foldable electronic device 1 can still have relatively convenient functions in the folded state. In addition, since the first antenna 210 has a good antenna performance, when the secondary display screen 60 displays the map navigation interface, navigating using the first antenna 210 can have a good navigation effect.

[0168] Next, the foldable electronic device 1 provided in the embodiment of the present application is simulated and explained.

[0169] See also Fig.29 , Fig.29 A schematic diagram of the S parameters and system total efficiency of a foldable electronic device in a folded state in a first frequency band provided for one embodiment of the present application. In this schematic diagram, the horizontal axis is frequency (Frequency), the unit is GHz; the vertical axis is dB. Among them, curve ① is the S1,1 parameter curve when the foldable electronic device 1 is in the unfolded state; curve ② is the system total efficiency (SystemTot.Efficiency) curve when the foldable electronic device 1 is in the unfolded state. It can be seen from curve ① of this simulation diagram that the first frequency band is the GPS-L5 frequency band; it can be seen from curve ② of this simulation diagram that the foldable electronic device 1 has a good system total efficiency in the first frequency band when it is in the unfolded state.

[0170] See also Fig.30 , Fig.30The figure is a schematic diagram of the upper hemisphere proportion in the first frequency band when the foldable electronic device is in the unfolded state. In this schematic diagram, point a is the total radiation value (Power pattern, 3D, Tot. Rad. Power (Solid Angle)_all) of the foldable electronic device 1 in the unfolded state in the first frequency band, and the value is 0.0031736092; point b is the upper hemisphere radiation value (Power pattern, 3D, Tot. Rad. Power (Solid Angle)_top) of the foldable electronic device 1 in the unfolded state in the first frequency band, and the value is 0.001626428; point c is the lower hemisphere radiation value (Power pattern, 3D, Tot. Rad. Power (Solid Angle)_down) of the foldable electronic device 1 in the unfolded state in the first frequency band, and the value is 0.0015471812. Among them, the ratio of the value at point b to the value at point a is the proportion of the upper hemisphere of the first frequency band when the foldable electronic device 1 is in the unfolded state (about 51.2%), which shows that the upper hemisphere has a higher proportion. When the foldable electronic device 1 is in the unfolded state, it has a better communication effect and antenna performance when communicating with the satellite using the first frequency band.

[0171] See also Fig.31 , Fig.31 It is a schematic diagram of the S parameters and system total efficiency of the foldable electronic device in the second frequency band. In this schematic diagram, the horizontal axis is frequency (Frequency), the unit is GHz; the vertical axis unit is dB. Among them, curve ① is the S1,1 parameter curve when the foldable electronic device 1 is in the unfolded state; curve ② is the system total efficiency (SystemTot.Efficiency) curve when the foldable electronic device 1 is in the unfolded state. It can be seen from curve ① of this simulation diagram that the second frequency band is a low-frequency band; it can be seen from curve ② of this simulation diagram that the foldable electronic device 1 has a good system total efficiency in the second frequency band when it is in the unfolded state.

[0172] See also Fig.32 , Fig.32It is a schematic diagram of the S parameter curves of the foldable electronic device in the unfolded state and the folded state provided by the embodiment of the present application and the S parameter curve of the foldable electronic device in the folded state provided by the embodiment of the present application. In this schematic diagram, the horizontal axis is the frequency (Frequency), the unit is GHz; the vertical axis unit is dB. Curve ① is the S parameter (S-Parameter) curve of the foldable electronic device 1 in the unfolded state provided by the embodiment of the present application, curve ② is the S parameter curve of the foldable electronic device 1 in the folded state provided by the embodiment of the present application, and curve ③ is the S parameter curve of the foldable electronic device 1 in the folded state provided by the embodiment of the present application. Since the foldable electronic device 1 provided by the embodiment of the present application supports the first frequency band, the second radiator 221 is a parasitic branch of the first radiator 211, and therefore, it is marked as S1,1 folded + parasitic in the figure. It can be seen from this simulation diagram that the antenna performance of the foldable electronic device 1 provided by the embodiment of the present application when it is in the folded state and supports the first frequency band is better than the antenna performance of the foldable electronic device 1 provided by the embodiment of the present application when it is in the folded state and supports the first frequency band.

[0173] See also Fig.33 , Fig.33 The S parameter curves of the foldable electronic device in the unfolded state and the folded state provided by the embodiment of the present application are not adopted, and the schematic diagram of the total system efficiency curve of the foldable electronic device in the folded state provided by the embodiment of the present application is adopted. In this schematic diagram, the horizontal axis is the frequency (Frequency), the unit is GHz; the vertical axis unit is the total system efficiency (System Total Efficiency), the unit is dB. Curve ① is the total system efficiency curve of the foldable electronic device 1 in the unfolded state provided by the embodiment of the present application, curve ② is the total system efficiency curve of the foldable electronic device 1 in the folded state provided by the embodiment of the present application, and curve ③ is the total system efficiency curve of the foldable electronic device 1 in the folded state provided by the embodiment of the present application. It can be seen from this simulation diagram that the foldable electronic device 1 provided by this embodiment is at least partially stacked and coupled with the first radiator 221 in the folded state, and the second radiator 221 supports the first frequency band as a parasitic branch of the first antenna 210. Therefore, the total system efficiency of the foldable electronic device 1 in the folded state and in the first frequency band is significantly improved, even exceeding the total system efficiency in the unfolded state in curve ①. It can be seen that the performance of the foldable electronic device 1 provided in the embodiment of the present application is significantly improved when it is in the folded state and in the first frequency band.

[0174] See also Fig.34 , Fig.34It is a schematic diagram of the upper hemisphere proportion in the first frequency band when the foldable electronic device is in the folded state. In this schematic diagram, point a is the total radiation value (Power pattern, 3D, Tot. Rad. Power (Solid Angle)_all) of the foldable electronic device 1 in the first frequency band when it is in the folded state, and the value is 0.038449672; point b is the upper hemisphere radiation value (Power pattern, 3D, Tot. Rad. Power (Solid Angle)_top) of the foldable electronic device 1 in the first frequency band when it is in the folded state, and the value is 0.22463707; point c is the lower hemisphere radiation value (Power pattern, 3D, Tot. Rad. Power (Solid Angle)_down) of the foldable electronic device 1 in the first frequency band when it is in the folded state, and the value is 0.015985965. Among them, the ratio of the value at point b to the value at point a is the proportion of the upper hemisphere of the first frequency band when the foldable electronic device 1 is in the unfolded state (about 58.4%), which shows that the upper hemisphere accounts for a higher proportion. When the foldable electronic device 1 is in the folded state, it has a better communication effect and antenna performance when communicating with the satellite using the first frequency band. When the foldable electronic device 1 is in the folded state and uses the first frequency band to communicate with the satellite for positioning, the positioning is more accurate. When the foldable electronic device 1 is a mobile phone, the mobile phone is in the folded state and uses the first frequency band to communicate with the satellite for positioning, the positioning is more accurate.

[0175] In summary, an embodiment of the present application provides a design of a first antenna 210 (a GPS-L5 antenna in one embodiment of the present case) of a foldable electronic device 1 (e.g., a FLIP folding machine), in which the first radiator 211 of the first antenna 210 is disposed on a side of the first free edge 111 away from the folding axis L. When the foldable electronic device 1 is in a folded state, the risk of the user folding the first radiator 211 and holding the first antenna 210 tightly when holding the foldable electronic device 1 can be reduced or even avoided, thereby improving manual efficiency.

[0176] Furthermore, the first antenna 210 (a GPS-L5 antenna in one embodiment of the present invention) of the foldable electronic device 1 (FLIP folding machine) provided in the embodiment of the present application is designed, and in combination with the second antenna 220 (a lower antenna LB antenna in one embodiment of the present invention), the foldable electronic device 1 has a higher bandwidth and efficiency in the first frequency band when in the folded state, and the total radiation efficiency increases instead of decreases compared to the unfolded state.

[0177] In addition, the foldable electronic device 1 provided in the embodiment of the present application has a high upper hemisphere occupancy rate regardless of whether it is in the unfolded state or the folded state, and the upper hemisphere occupancy rate is even higher when the foldable electronic device 1 is in the folded state (also called a folding scenario).

[0178] In addition, in one embodiment, the third radiator 231 in the third antenna 230 of the foldable electronic device 1 may be an integral structure with the first radiator 211 of the first antenna 210. In addition, when the foldable electronic device 1 further includes an NFC antenna 240, the first radiator 211 and the third radiator 231 may also be reused as the radiator of the NFC antenna 240. In other words, the first radiator 211 of the first antenna 210 and the third radiator 231 of the third antenna 230 are co-existent, so as to realize that the radiator of the NFC antenna 240 is purely co-existent with the first radiator 211 and the third radiator 231.

[0179] In addition, in one embodiment, when the foldable electronic device 1 includes a secondary display screen 60, the first radiator 211 is located away from the secondary display screen 60. When the foldable electronic device 1 is in a folded state, the free efficiency can be improved, the system total efficiency and system radiation efficiency of the foldable electronic device 1 in the first frequency band can be improved, and the first antenna 210 can be prevented from being held tightly when the secondary display screen 60 is operated when the foldable electronic device 1 is in a folded state.

[0180] In addition, in one embodiment, when the foldable electronic device 1 is in a folded state and a map navigation interface is displayed through the secondary display screen 60, navigation is performed using the first antenna 210, which can have a better navigation effect.

[0181] It can be understood that the foldable electronic device 1 provided in each embodiment of the present application is mainly introduced when the foldable electronic device 1 is in a folded state. In one embodiment, when the foldable electronic device 1 is in an unfolded state, the first antenna 210 supports a first frequency band, and the second antenna 220 supports a second frequency band. Since the second radiator 221 cannot couple with the first radiator 211 when the foldable electronic device 1 is in an unfolded state, the second radiator 221 no longer supports the first frequency band when the foldable electronic device 1 is in an unfolded state.

[0182] The third antenna 230 in the antenna assembly 20 has nothing to do with whether the foldable electronic device 1 is folded, and the third antenna 230 can support the third frequency band regardless of whether the foldable electronic device is in a folded state or an unfolded state.

[0183] Accordingly, the NFC antenna 240 in the antenna assembly 20 has nothing to do with whether the foldable electronic device 1 is folded, and the NFC antenna 240 can support the third frequency band regardless of whether the foldable electronic device is in a folded state or an unfolded state.

[0184] In addition, when the first antenna 210 in the antenna assembly 20 also supports the fourth frequency band, it has nothing to do with whether the foldable electronic device 1 is folded. Regardless of whether the foldable electronic device 1 is in a folded state or an unfolded state, the first antenna 210 can support the fourth frequency band.

[0185] 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 foldable along a folding axis, so that the foldable electronic device is in a folded state and an unfolded state, wherein the first body has a first free edge away from the folding axis, and the second body has a second free edge away from the folding axis; The antenna assembly comprises: A first antenna includes a first radiator and a first feed source, wherein the first radiator is arranged corresponding to the first free edge, the first radiator has a first feed point, and the first feed source is electrically connected to the first feed point to excite the first radiator to support a first frequency band for communicating with a satellite; and A second antenna, comprising a second radiator and a second feed source, wherein the second radiator is arranged corresponding to the second free edge, the second radiator has a second feed point, and the second feed source is electrically connected to the second feed point to excite the second radiator to support a second frequency band of cellular communication; When the foldable electronic device is in a folded state, the second radiator is at least partially stacked and coupled with the first radiator, and the second radiator also serves as a parasitic branch of the first antenna to support the first frequency band.

2. The foldable electronic device according to claim 1, characterized in that: The first radiator further has a first grounding end and a first free end, the first grounding end is grounded, and the first feeding point is located between the first grounding end and the first free end; The second radiator further has a second grounding end and a second free end, the second grounding end is grounded, and the second feeding point is located between the second grounding end and the second free end; A direction from the second ground end to the second free end is opposite to a direction from the first ground end to the first free end.

3. The foldable electronic device according to claim 2, characterized in that: When the first radiator supports the first frequency band, the first radiator is excited to generate a first resonance mode, wherein the first resonance mode is a quarter wavelength mode from the first ground end to the first free end; When the foldable electronic device is in a folded state, the second radiator is excited to generate a second resonance mode to support the first frequency band, wherein the second resonance mode is a quarter-wavelength mode from the second free end to the second ground end.

4. The foldable electronic device according to claim 3, characterized in that: When the foldable electronic device is in a folded state, the first radiator is excited to generate a first resonant current to support the first frequency band; The second radiator is excited to generate a second resonant current to support the first frequency band, wherein a flow direction of the second resonant current is the same as a flow direction of the first resonant current.

5. The foldable electronic device according to claim 1, wherein: The first antenna also includes a first matching circuit. The first feed source electrically connects the first matching circuit to the second radiator. The first matching circuit is used to adjust the equivalent electrical length of the first radiator.

6. The foldable electronic device according to claim 5, characterized in that: The resonant frequency of the first frequency band is greater than the resonant frequency of the second frequency band, the physical length of the first radiator is a first length La, and the physical length of the second radiator is a second length Lb, wherein Lb>La; and the second antenna also includes a second matching circuit, the second feed source electrically connects the second matching circuit to the second radiator, and the second matching circuit is used to adjust the equivalent electrical length of the second radiator.

7. The foldable electronic device according to claim 2, characterized in that: The first radiator further has a first grounding end and a first free end, the first grounding end is grounded, and the first feeding point is located between the first grounding end and the first free end; The second radiator also has a free end portion disposed opposite to the second free end, wherein the second ground end and the second feeding point are both located between the second free end and the free end portion, and the second ground end is disposed adjacent to the free end portion, and the second feeding point is disposed adjacent to the second free end.

8. The foldable electronic device according to claim 2, wherein: The antenna assembly further comprises: The third antenna comprises a third radiator and a third feed source, the third radiator is arranged corresponding to the first free edge, the third radiator comprises a third grounding terminal, a third feeding point and a third free end, the third grounding terminal is grounded and connected to the first grounding terminal, the third feed source is electrically connected to the third feeding point and excites the third radiator with a third frequency band.

9. The foldable electronic device according to claim 8, characterized in that: The first grounding end has a first grounding point, and the first grounding end is grounded through the first grounding point; the third grounding end has a second grounding point, and the third grounding end is grounded through the second grounding point, and the first grounding point is spaced apart from the second grounding point.

10. The foldable electronic device according to claim 8, characterized in that: The first body has a first side and a second side disposed opposite to each other, and the first side and the second side are respectively connected to the first free edge by bending; the second body has a third side and a fourth side disposed opposite to each other, and the third side and the fourth side are respectively connected to the second free edge by bending; and when the foldable electronic device is in an unfolded state, the third side and the first side are located on the same side of the foldable electronic device, and the second side and the fourth side are located on the same side of the foldable electronic device; The first radiator is disposed adjacent to the first side edge compared to the third radiator, and the second radiator is disposed adjacent to the third side edge.

11. The foldable electronic device according to claim 8, characterized in that: The first body has a first side and a second side disposed opposite to each other, and the first side and the second side are respectively connected to the first free edge by bending; the second body has a third side and a fourth side disposed opposite to each other, and the third side and the fourth side are respectively connected to the second free edge by bending; and when the foldable electronic device is in an unfolded state, the third side and the first side are located on the same side of the foldable electronic device, and the second side and the fourth side are located on the same side of the foldable electronic device; The first radiator is disposed adjacent to the second side edge compared to the third radiator, the second radiator includes a main radiator and a parasitic radiator, the main radiator is electrically connected to the second feed source, and the second radiator is adjacent to the third side edge compared to the parasitic radiator, a coupling gap is provided between the parasitic radiator and the main radiator, the parasitic radiator is coupled to the main radiator through the coupling gap, and the parasitic radiator is adjacent to the fourth side edge compared to the main radiator; When the foldable electronic device is in a folded state, the parasitic radiator is coupled to the first radiator, and the parasitic radiator serves as a parasitic branch of the first antenna.

12. The foldable electronic device according to claim 8, characterized in that: The antenna assembly further comprises: An NFC antenna, wherein the NFC antenna further comprises an NFC feed source, wherein the NFC feed source is electrically connected to the first feeding point and the third feeding point, so that the first radiator and the third radiator also support an NFC frequency band.

13. The foldable electronic device according to claim 12, characterized in that: The first antenna further includes a first DC blocking capacitor, one end of the first DC blocking capacitor is electrically connected to the first ground terminal, and the other end of the first DC blocking capacitor is grounded; The third antenna further includes a second DC blocking capacitor, one end of the second DC blocking capacitor is electrically connected to the third ground terminal, and the other end of the second DC blocking capacitor is grounded.

14. The foldable electronic device according to claim 13, characterized in that: The first antenna further includes a first matching circuit, the first matching circuit includes a first isolation inductor and a first impedance matching branch, one end of the first isolation inductor is electrically connected to the first feeding point, and the first feed source is electrically connected to the first impedance matching branch to the first feeding point; The NFC antenna also includes a third DC blocking capacitor, one end of the third DC blocking capacitor is electrically connected to the other end of the first isolation inductor, the other end of the third DC blocking capacitor is grounded, and the NFC feed source is electrically connected to the one end of the third DC blocking capacitor.

15. The foldable electronic device according to claim 14, characterized in that: The third antenna further includes a third matching circuit, the third matching circuit includes a second isolation inductor and a second impedance matching branch, one end of the second isolation inductor is electrically connected to the third feeding point, and the third feed source is electrically connected to the second impedance matching branch to the third feeding point; The NFC antenna also includes a fourth DC blocking capacitor, one end of the fourth DC blocking capacitor is connected to the other end of the second isolation inductor, the other end of the fourth DC blocking capacitor is grounded, and the NFC feed source is also electrically connected to the one end of the fourth DC blocking capacitor.

16. The foldable electronic device according to claim 12, characterized in that: The first feed source is further used to excite the first radiator to support a fourth frequency band, wherein a resonant frequency point of the fourth frequency band is greater than a resonant frequency point of the first frequency band.

17. The foldable electronic device according to claim 16, wherein: When the first radiator supports the fourth frequency band, the first radiator is excited to generate a third resonance mode, wherein the third resonance mode is a quarter-wavelength mode from the first feed source to the first free end.

18. The foldable electronic device according to claim 12, wherein: The foldable electronic device further comprises: A camera module is disposed corresponding to the first body and adjacent to the NFC antenna.

19. The foldable electronic device according to claim 1, wherein: The first body further comprises a first side edge, and the first side edge is bent and connected to the first free edge; the foldable electronic device further comprises: A main display screen, which is disposed on one side of the foldable body and corresponds to the first body and the second body; A secondary display screen is arranged at the other side of the foldable main body and corresponds to the first main body, and the secondary display screen is arranged opposite to the main display screen, and the secondary display screen is arranged adjacent to the first side.

20. The foldable electronic device according to claim 19, characterized in that: The foldable electronic device also includes a processor. When the foldable electronic device is in a folded state, the secondary display screen is exposed, and the processor controls the secondary display screen to display a map navigation interface and use the first antenna for navigation.

21. The foldable electronic device according to claim 1, characterized in that: The first frequency band is the GPSL5 frequency band, and the second frequency band is the LB frequency band.

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