CN117748137A

CN117748137A - Electronic equipment

Info

Publication number: CN117748137A
Application number: CN202311874288.0A
Authority: CN
Inventors: 雍征东
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2023-12-29
Filing date: 2023-12-29
Publication date: 2024-03-22

Abstract

The application provides an electronic device. The electronic equipment comprises a reference ground and an antenna assembly, wherein the antenna assembly comprises a first radiator, a feed source, a second radiator and a second switch circuit; the first radiator is arranged at the top of the reference ground and is provided with a first end, a feed point and a second end; the feed source is electrically connected to the feed point and is used for exciting the first radiator to generate a first resonance mode supporting a first target frequency band, and the first resonance mode is a balanced mode of the first radiator; the second radiator is arranged corresponding to the reference ground and is electrically connected to the reference ground; the first switch circuit is electrically connected to the second radiator, and has a first state of being electrically disconnected from the reference ground and a second state of being electrically connected to the reference ground; the antenna component supports a first target frequency band when the first switch circuit is in a first state and has a first directional diagram; the antenna assembly has a second pattern when supporting a second target frequency band when the first switch circuit is in the second state, the second pattern being different from the first pattern.

Description

Electronic equipment

Technical Field

The application relates to the technical field of communication, in particular to electronic equipment.

Background

With the development of technology, electronic devices such as mobile phones are becoming more and more popular. The electronic device typically includes an antenna assembly. The antenna assembly can receive and transmit electromagnetic wave signals, and the electronic equipment communicates with other equipment through the antenna assembly. For example, the electronic device may communicate with an antenna assembly of another electronic device using the antenna assembly, or the electronic device may communicate with a satellite using the antenna assembly. However, in the related art, when an electromagnetic wave signal is transmitted and received by an antenna assembly, the communication effect is not good.

Disclosure of Invention

In a first aspect, embodiments of the present application provide an electronic device including a reference ground and an antenna assembly, the antenna assembly including:

the first radiator is arranged corresponding to the top of the reference ground and is provided with a first end, a feed point and a second end;

the feed source is electrically connected to the feed point and is used for exciting the first radiator to generate a first resonance mode supporting a first target frequency band, wherein the first resonance mode is a balanced mode of the first radiator;

a second radiator disposed corresponding to the reference ground, and electrically connected to the reference ground; and

A first switching circuit electrically connected to the second radiator, the first switching circuit having a first state electrically disconnected from the reference ground and a second state electrically connected to the reference ground;

when the first switch circuit is in the first state, the antenna component has a first directional diagram when supporting the first target frequency band; when the first switch circuit is in the second state, the antenna component supports the first target frequency band and has a second directional diagram, wherein the second directional diagram is different from the first directional diagram.

In summary, in the antenna assembly in the electronic device provided by the embodiment of the present application, the first resonant mode is a balanced mode of the first radiator, and when the antenna assembly supports the first target frequency band, the antenna assembly has a better upper hemispherical duty ratio. In addition, the antenna assembly further includes a second radiator and a first switching circuit electrically connected to the second radiator and also electrically connected to the reference ground. When the first switch circuit is in a first state of being electrically disconnected from the reference ground, the antenna assembly has a first directivity pattern when supporting the first target frequency band; when the first switch circuit is in a second state electrically connected with the reference, the antenna component has a second directional diagram when supporting the first target frequency band. It follows that by configuring the state of the first switching circuit, a reconfiguration of the pattern when the antenna assembly supports the first target frequency band can be achieved. When the antenna component of the electronic equipment is used for communicating with the satellite, the state of the first switch circuit can be configured according to different postures of the electronic equipment relative to the satellite, so that the communication with the satellite by using the first target frequency band has good traffic performance.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

For a clearer description of the technical solutions in the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of an electronic device according to an embodiment of the present application;

FIG. 2 is a schematic view of a portion of the structure of the electronic device provided in FIG. 1;

FIG. 3 is an equivalent schematic diagram of the first switch circuit of FIG. 2 electrically disconnected from the reference ground;

FIG. 4 is an equivalent schematic diagram of the first switch circuit in FIG. 2 electrically connected to the reference ground;

FIG. 5 is a schematic diagram of the currents when the antenna assembly in the electronic device shown in FIG. 2 supports a first resonant mode;

FIG. 6 is a schematic diagram of a portion of the electronic device of FIG. 2;

fig. 7 is a schematic view of a part of the structure of an electronic device according to another embodiment;

FIG. 8 is an identified schematic view of a portion of the components of the electronic device shown in FIG. 7;

FIG. 9 is a schematic diagram of a partial size indicator of the electronic device shown in FIG. 7;

FIG. 10 is a schematic diagram of an electronic device according to another embodiment in an expanded state;

FIG. 11 is a schematic view of the electronic device shown in FIG. 10 in a folded state;

FIG. 12 is a schematic view of a portion of the electronic device shown in FIG. 10;

fig. 13 is a partial schematic structural view of the electronic device shown in fig. 11;

FIG. 14 is a schematic view of a portion of the electronic device of FIG. 13;

fig. 15 is a schematic view of a part of the structure of an electronic device according to another embodiment of the present application;

fig. 16 is a schematic view of a part of the structure of an electronic device according to another embodiment of the present disclosure;

fig. 17 is a schematic view of a part of the structure of an electronic device according to another embodiment of the present application;

fig. 18 is a schematic view of a part of the structure of an electronic device according to another embodiment of the present application;

FIG. 19 is a schematic diagram of a current distribution corresponding to a second resonant mode of the electronic device shown in FIG. 18;

FIG. 20 is a schematic view of a part of an electronic device according to another embodiment of the present disclosure;

fig. 21 is a schematic view of an electronic device provided in the related art in an unfolded state;

FIG. 22 is a schematic view of the electronic device of FIG. 21 in a folded state;

fig. 23 is a schematic diagram of S-parameters of an antenna assembly in the electronic device shown in fig. 21 and 22;

FIG. 24 is a schematic current diagram of the electronic device shown in FIG. 22 supporting a first resonant mode;

FIG. 25 is a diagram illustrating the electronic device of FIG. 22 supporting a first target frequency band;

FIG. 26 is a schematic diagram of the current flow of the electronic device shown in FIG. 22 supporting a second resonant mode;

FIG. 27 is a diagram illustrating the electronic device of FIG. 22 supporting a second target frequency band;

FIG. 28 is a block diagram of a first switch circuit in a first state when the electronic device of FIG. 20 is in a folded state;

FIG. 29 is a radiation pattern of the first switching circuit of FIG. 28 in a first state;

FIG. 30 is a schematic diagram showing the current distribution of the first switch circuit in the first state;

fig. 31 is a graph of upper hemispherical duty cycle data of the antenna assembly when the first switching circuit is in the first state;

FIG. 32 is a block diagram of a first switch in a second state when the electronic device of FIG. 20 is in a folded state;

FIG. 33 is a radiation pattern of the first switch of FIG. 32 in a second state;

FIG. 34 is a schematic diagram showing the current distribution of the first switch in the second state;

FIG. 35 is a graph of the upper hemisphere data duty cycle when the first switch circuit is in the second state;

FIG. 36 is a diagram illustrating the left-hand component and right-hand component of the directivity pattern when the electronic device in FIG. 22 supports the first target frequency band;

FIG. 37 is a schematic diagram of a left-hand component and a right-hand component of a directional diagram supporting a first target frequency band when a first switch circuit in the electronic device of FIG. 8 is in a first state;

FIG. 38 is a schematic diagram of the left-hand component and the right-hand component of the directivity pattern supporting the first target frequency band when the first switch circuit in the electronic device in FIG. 8 is in the second state;

FIG. 39 is a diagram illustrating a first target frequency band supported by the electronic device of FIG. 17 in a state;

FIG. 40 is a diagram illustrating a first target frequency band supported by the electronic device of FIG. 17 in another state;

fig. 41 is a schematic view of a part of the structure of an electronic device according to another embodiment of the present application.

Reference numerals for main elements:

the electronic device 1, the reference ground 10, the antenna assembly 20, the first middle frame 30, the second middle frame 40, the flexible display screen 50 and the shell 60;

With reference to ground 10, top edge 101, side edge 102, bottom edge 103, connecting edges 104;

first sub-reference ground 110, fold axis L0, first top edge 111, first side edge 112, first bottom edge 113, first connecting edge 114;

a second sub-reference ground 120, a second top edge 121, a second side edge 122, a second bottom edge 123, a second connecting edge 124, and a rotation axis 130;

a first radiator 210, a first end 211, a second end 212, a feed point P1 and a feed source S;

the second radiator 220, the third end 221, the first connection point P2, the first ground point G1, the fourth end 222;

a first switching circuit 230, a first switch 231, a first matching device 232, a second switching circuit 240;

a third radiator 250, a fifth end 251, a second connection point P3, a second ground point G2, and a sixth end 252;

a third switching circuit 260, a second switch 261, a second matching device 262;

a fourth radiator 270;

the display device comprises a first frame body 310, a first frame 320, a second frame body 410, a second frame 420, a first display portion 510, a second display portion 520, a bending portion 530, a first shell 610 and a second shell 620.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without undue burden, are within the scope of the present application.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

The present application provides an electronic device 1, where the electronic device 1 includes, but is not limited to, devices with communication functions such as a mobile phone, a wristwatch, an internet device (mobile internet device, MID), an electronic book, a portable player station (Play Station Portable, PSP), or a Personal digital assistant (Personal DigitalAssistant, PDA). In one embodiment, the electronic device 1 includes an antenna assembly 20, and the antenna assembly 20 supports a first target frequency band for communication with a satellite. In an embodiment, the electronic device 1 is an electronic device 1 using GPS technology. GPS as referred to herein means positioning, including but not limited to Global positioning System (Global Positioning System, GPS) positioning, beidou positioning, GLONASS positioning, GALILEO positioning, and the like.

Referring to fig. 1, fig. 2, fig. 3, and fig. 4 together, fig. 1 is a schematic diagram of an electronic device according to an embodiment of the present application; FIG. 2 is a schematic view of a portion of the structure of the electronic device provided in FIG. 1; FIG. 3 is an equivalent schematic diagram of the first switch circuit of FIG. 2 electrically disconnected from the reference ground;

fig. 4 is an equivalent schematic diagram of the first switch circuit in fig. 2 when electrically connected to the reference ground. The electronic device 1 comprises a reference ground 10 and an antenna assembly 20. The antenna assembly 20 includes a first radiator 210, a feed S, a second radiator 220, and a first switching circuit 230. The first radiator 210 is disposed corresponding to the top of the reference ground 10, and the first radiator 210 has a first end 211, a feeding point P1, and a second end 212. The feed source S is electrically connected to the feeding point P1, and is configured to excite the first radiator 210 to generate a first resonant mode supporting a first target frequency band, where the first resonant mode is a balanced mode of the first radiator 210. The second radiator 220 is disposed corresponding to the reference ground 10, and the second radiator 220 is electrically connected to the reference ground 10. The first switching circuit 230 is electrically connected to the second radiator 220, and the first switching circuit 230 has a first state (see fig. 3) of being electrically disconnected from the reference ground 10, and a second state (see fig. 4) of being electrically connected to the reference ground 10. When the first switch circuit 230 is in the first state, the antenna assembly 20 has a first directivity pattern when supporting the first target frequency band; when the first switch circuit 230 is in the second state, the antenna assembly 20 has a second pattern when supporting the first target frequency band, wherein the second pattern is different from the first pattern.

The electronic device 1 may be a non-foldable electronic device (also referred to as a board machine) or a foldable electronic device. In the schematic diagram of the present embodiment, the electronic device 1 is exemplified as a non-foldable electronic device.

The reference ground 10 may be, but is not limited to, a middle frame of the electronic device 1, or a shielding of a display screen of the electronic device 1, or a battery cover of the electronic device 1, etc.

The first radiator 210 may be a laser direct structuring (Laser Direct Structuring, LDS) radiator, or a flexible circuit board (Flexible Printed Circuit, FPC) radiator, or a printed direct structuring (Print Direct Structuring, PDS) radiator, or a metal stub radiator. When the antenna assembly 20 is applied to the electronic device 1, the first radiator 210 may be a structural antenna (Mechanical DesignAntenna, MDA) radiator designed by using the metal of the insert of the electronic device 1 itself, for example, the first radiator 210 may be an antenna radiator designed by using a middle frame formed by plastic and metal of the electronic device 1. In addition, the first radiator 210 may be a metal frame antenna radiator designed for a metal middle frame. It is to be understood that the shape, configuration and material of the first radiator 210 are not particularly limited.

Neither the first end 211 nor the second end 212 is electrically connected to the reference ground 10, and therefore both the first end 211 and the second end 212 are free ends.

The first target frequency band is a frequency band capable of communicating with a satellite, and the frequency range of the first target frequency band can be, but is not limited to, 1.98 GHz-2.2 GHz. In the description of the range in the embodiment of the present application, the end point value is included. For example, the frequencies of the first target frequency band include an end point value of 1.98GHz and also include an end point value of 2.2GHz. When the range of the first target frequency band is 1.98GHz to 2.2GHz, the first target frequency band may be a frequency band between 1.98GHz and 2.2GHz.

Referring to fig. 5, fig. 5 is a schematic diagram illustrating currents when the antenna assembly in the electronic device shown in fig. 2 supports the first resonant mode. The first resonance mode is a balanced mode of the first radiator 210, i.e. the first resonance mode is a half wavelength mode from the first end 211 to the second end 212. In the schematic diagram of the present embodiment, the resonant current corresponding to the first resonant mode flows from the second end 212 to the first end 211. The direction of the resonant current is shown by the arrow in fig. 5, and it will be understood that the position of the resonant current is located on the first radiator 210, and the position of the arrow in fig. 5 should not be construed as limiting the position of the resonant current on the first radiator 210. It will be appreciated that in the next half-wavelength period, the resonant current corresponding to the first resonant mode flows from the first end 211 to the second end 212.

The first resonant mode is a balanced mode of the first radiator 210, and thus, when the antenna assembly 20 supports the first target frequency band, the antenna assembly has a better upper hemispherical duty cycle. Specifically, if the first resonant mode is a balanced mode of the first radiator 210, the directional diagram when the antenna assembly 20 supports the first target frequency band is directional radiation of radiation toward the top of the electronic device 1, which is beneficial to satellite positioning when the electronic device 1 uses the first target frequency band to communicate with satellites. The illustration will be made later in connection with the simulation diagram.

The second radiator 220 may be a laser direct structuring (Laser Direct Structuring, LDS) radiator, or a flexible circuit board (Flexible Printed Circuit, FPC) radiator, or a printed direct structuring (Print Direct Structuring, PDS) radiator, or a metal stub radiator. When the antenna assembly 20 is applied to the electronic device 1, the second radiator 220 may be a structural antenna (Mechanical DesignAntenna, MDA) radiator designed by using the metal of the insert of the electronic device 1 itself, for example, the second radiator 220 may be an antenna radiator designed by using a middle frame formed by plastic and metal of the electronic device 1. In addition, the second radiator 220 may be a metal frame antenna radiator designed for a metal middle frame. It is to be understood that the shape, configuration and material of the second radiator 220 are not particularly limited. The form of the second radiator 220 may be the same as that of the first radiator 210, or may be different from that of the first radiator 210, which is not limited herein.

Referring to fig. 2, the second radiator 220 has a first connection point P2, one end of the first switch circuit 230 is electrically connected to the first connection point P2, and the other end of the first switch circuit 230 is electrically connected to the reference ground 10. When the first switching circuit 230 is electrically disconnected from the reference ground 10, the second radiator 220 is disconnected through a path electrically connected between the first connection point P2 and the reference ground 10. When the first switching circuit 230 is electrically connected to the reference ground 10, the second radiator 220 may be electrically connected to the reference ground 10 through the first connection point P2. As can be seen from this, when the states of the first switching circuits 230 are different, the connection relationship between the first connection point P2 of the second radiator 220 and the reference ground 10 is different. As can be seen from this, the different states of the first switch circuit 230 result in different connection relationships between the first connection point P2 of the second radiator 220 and the reference ground 10, so that the second radiator 220 has different adjustment effects on the current on the reference ground 10, and thus the antenna assembly 20 supports different patterns in the first target frequency band.

The pattern when the first switch circuit 230 is in the first state and the first switch circuit 230 is in the second state will be described later with reference to a simulation diagram.

In summary, in the antenna assembly 20 of the electronic device 1 provided in the embodiment of the present application, the first resonant mode is the balanced mode of the first radiator 210, and when the antenna assembly 20 supports the first target frequency band, the antenna assembly has a better upper hemispherical duty ratio. In addition, the antenna assembly 20 further includes a second radiator 220 and a first switch circuit 230, the first switch circuit 230 being electrically connected to the second radiator 220 and also electrically connected to the reference ground 10. When the first switch circuit 230 is in a first state of being electrically disconnected from the reference ground 10, the antenna assembly 20 has a first pattern when supporting the first target frequency band; when the first switch circuit 230 is in a second state electrically connected to the reference ground 10, the antenna assembly 20 has a second pattern when supporting the first target frequency band. It follows that by configuring the state of the first switching circuit 230, a reconfiguration of the pattern when the antenna assembly 20 supports the first target frequency band can be achieved. When the antenna assembly 20 of the electronic device 1 is used for communication with a satellite, the state of the first switch circuit 230 can be configured according to different attitudes of the electronic device 1 relative to the satellite, so that the communication with the satellite by using the first target frequency band has better traffic performance.

With further reference to fig. 2, the reference ground 10 includes a top edge 101, a side edge 102, a bottom edge 103, and a connecting edge 104 that are sequentially bent and connected. The first radiator 210 is disposed in correspondence with the top edge 101. The second radiator 220 is disposed corresponding to the side 102. The second radiator 220 includes a third end 221, a first connection point P2, a first ground point G1 and a fourth end 222, the first connection point P2 is electrically connected to the first switch circuit 230 to the reference ground 10, and the first ground point G1 is electrically connected to the reference ground 10 to be grounded.

In the present embodiment, the electronic apparatus 1 is illustrated as an example of a portrait screen state. The top edge 101 is the edge farthest from the ground when the electronic device 1 is in the vertical screen state; the bottom edge 103 is the edge closest to the ground when the electronic equipment 1 is used in a vertical screen; the side 102 and the connecting side 104 are both sides of the electronic device 1 when the electronic device is in use.

In this embodiment, the reference ground 10 is rectangular or similar. In this embodiment, the length of the side edge 102 is greater than the length of the top edge 101, and the length of the side edge 102 is greater than the length of the bottom edge 103; the length of the connecting edge 104 is greater than the length of the bottom edge 103, and the length of the connecting edge 104 is greater than the length of the top edge 101. The length of the top edge 101 is equal or approximately equal to the length of the bottom edge 103. The length of the connecting edge 104 is equal or approximately equal to the length of the side edge 102.

The first radiator 210 is disposed corresponding to the top edge 101, so that the first radiator 210 radiates toward the top of the electronic device 1 in a direction pattern when supporting the first target frequency band.

The second radiator 220 is disposed corresponding to the side 102, and radiates toward the side 102 when the antenna assembly 20 of the electronic device 1 supports the first target frequency band by the action of the first switch circuit 230.

In this embodiment, the first ground point G1 of the second radiator 220 is electrically connected to the reference ground 10 in a manner that the second radiator 220 and the reference ground 10 are integrally formed, but not limited to, the first ground point G1 of the second radiator 220 is electrically connected to the reference ground 10 through a connection branch; alternatively, the first ground point G1 of the second radiator 220 is electrically connected to the reference ground 10 through a matching circuit, wherein the matching circuit may be a zero ohm device; alternatively, the first ground point G1 of the second radiator 220 is electrically connected to the reference ground 10 through conductive paste or conductive wires.

In the present embodiment, the first ground point G1 of the second radiator 220 is electrically connected to the reference ground 10 so as to affect the distribution of the resonant current on the reference ground 10, so that the resonant current on the reference ground 10 is concentrated on the top of the reference ground 10, the current distribution at the bottom of the reference ground 10 is suppressed, and the lateral current (viewing angle) distribution on the reference ground 10 is increased. Thereby increasing the upper hemispherical radiation duty ratio of the antenna assembly 20 when operating in the first target frequency band, increasing the directivity of the antenna assembly 20 when supporting the first target frequency band, and increasing the antenna gain. When the electronic device 1 communicates with the satellite by using the first target frequency band of the antenna assembly 20, the communication effect is better.

Therefore, in the antenna assembly 20 of the electronic device 1 provided in the embodiment of the present application, the first radiator 210 is disposed corresponding to the top edge 101, the second radiator 220 is disposed corresponding to the side edge 102, and the first switch circuit 230 is used to control the antenna assembly 20 to support the first target frequency band, so that the directional diagram is reconfigurable. The antenna assembly 20 is realized to support the radiation of the directional diagram towards the top edge 101 and the radiation of the side edge 102 of the electronic device 1 when the first target frequency band, so that the use requirement of the vertical screen of the electronic device 1 is met, the upper hemispherical radiation duty ratio of the electronic device 1 and the directivity of the antenna under the use scene of the vertical screen are improved, the gain of the circularly polarized antenna is improved, and the user experience is improved.

Referring to fig. 6, fig. 6 is a schematic diagram of a portion of the electronic device in fig. 2. The distance Gap1 from the first ground point G1 to the top edge 101 satisfies the formula (1):

wherein f1 is the working frequency of the first target frequency band εr ₁ For the dielectric constant of the medium around the second radiator, a is 0.7 to 1.5. The working frequency of the first target frequency band is generally 1.97GHz-2.2GHz. When the second radiator 220 is wrapped with a medium such as a wrapping layer, the er ₁ A dielectric constant that is the encapsulation layer; when the second radiator 220 is exposed to air without a coating layer, the medium surrounding the second radiator 220 is air, and the dielectric constant is 1.

The distance from the first ground point G1 to the top edge 101 satisfies the above formula (1), so that the second radiator 220 has a better adjustment effect on the directional diagram of the first target frequency band.

Referring to fig. 7, fig. 7 is a schematic view of a portion of an electronic device according to another embodiment. The electronic device 1 comprises a reference ground 10 and an antenna assembly 20. The antenna assembly 20 includes a first radiator 210, a feed S, a second radiator 220, and a first switching circuit 230. The first radiator 210 is disposed corresponding to the top of the reference ground 10, and the first radiator 210 has a first end 211, a feeding point P1, and a second end 212. The feed source S is electrically connected to the feeding point P1, and is configured to excite the first radiator 210 to generate a first resonant mode supporting a first target frequency band, where the first resonant mode is a balanced mode of the first radiator 210. The second radiator 220 is disposed corresponding to the reference ground 10, and the second radiator 220 is electrically connected to the reference ground 10. The first switching circuit 230 is electrically connected to the second radiator 220, and the first switching circuit 230 has a first state electrically disconnected from the reference ground 10, and a second state electrically connected to the reference ground 10. When the first switch circuit 230 is in the first state, the antenna assembly 20 has a first directivity pattern when supporting the first target frequency band; when the first switch circuit 230 is in the second state, the antenna assembly 20 has a second pattern when supporting the first target frequency band, wherein the second pattern is different from the first pattern.

The reference ground 10 and the antenna assembly 20 refer to the foregoing descriptions, and are not repeated herein.

In this embodiment, the antenna assembly 20 further includes a third radiator 250 and a second switching circuit 240. The third radiator 250 is disposed corresponding to the connecting edge 104. The second switching circuit 240 is electrically connected to the third radiator 250. The second switching circuit 240 has a third state of being electrically disconnected from the reference ground 10 and a fourth state of being electrically connected to the reference ground 10. Wherein the pattern of the second switch circuit 240 in the fourth state is different from the pattern of the second switch in the fourth state. The second switch circuit 240 cooperates with the first switch circuit 230 to adjust the pattern of the antenna assembly 20 when supporting the first target frequency band.

The third radiator 250 may be a laser direct structuring (Laser Direct Structuring, LDS) radiator, or a flexible circuit board (Flexible Printed Circuit, FPC) radiator, or a printed direct structuring (Print Direct Structuring, PDS) radiator, or a metal stub radiator. When the antenna assembly 20 is applied to the electronic device 1, the third radiator 250 may be a structural antenna (Mechanical DesignAntenna, MDA) radiator designed by using the metal of the insert of the electronic device 1 itself, for example, the third radiator 250 may be an antenna radiator designed by using a middle frame formed by plastic and metal of the electronic device 1. In addition, the third radiator 250 may be a metal frame antenna radiator designed for a metal middle frame. It is to be understood that the shape, configuration and material of the third radiator 250 are not particularly limited. The form of the third radiator 250 may be the same as the form of the first radiator 210, or may be different from the form of the first radiator 210; the third radiator 250 may have the same form as the second radiator 220 or may have a different form from the second radiator 220, which is not limited herein.

In this embodiment, the third radiator 250 and the second radiator 220 are respectively disposed on different sides of the reference ground 10, specifically, the second radiator 220 is disposed on the side 102, and the third radiator 250 is disposed on the connecting side 104, so that the second switch circuit 240 and the third radiator 250 have different influences on the directional diagram of the first target frequency band supported by the antenna assembly 20, and the first switch circuit 230 and the second radiator 220 have different influences on the first target frequency band supported by the antenna assembly 20. The third radiator 250 is disposed corresponding to the connection edge 104 of the reference ground 10, so that radiation toward the connection edge 104 when the antenna assembly 20 supports the first target frequency band can be realized.

The first switch circuit 230 has a first state of being electrically disconnected from the reference ground 10, and a second state of the first switch circuit 230 being electrically connected to the reference ground 10; further, the second switching circuit 240 has a third state of being electrically disconnected from the reference ground 10, and a fourth state of the second switching circuit 240 being electrically connected to the reference ground 10; accordingly, the first switch circuit 230 and the second switch circuit 240 are combined in various ways. Specifically, the first combination is: the first switch circuit 230 is in a first state, and the second switch circuit 240 is in a third state; the second combination is: the first switch circuit 230 is in a first state, and the second switch circuit 240 is in a fourth state; the third combination is: the first switch circuit 230 is in a second state, and the second switch circuit 240 is in a third state; the fourth combination is: the second switch circuit 240 is in the second state, and the second switch circuit 240 is in the fourth state. When the first switch circuit 230 and the second switch circuit 240 are different combinations, the antenna assembly 20 has different patterns when supporting the first target frequency band. Therefore, in the antenna assembly 20 of the electronic device 1 provided in the embodiment of the present application, the first radiator 210 is disposed corresponding to the top edge 101, the second radiator 220 is disposed corresponding to the side edge 102, and the first switch circuit 230 controls the antenna assembly 20 to support the first target frequency band, so that the directional diagram is reconfigurable. In addition, the antenna assembly 20 further includes a third radiator 250 and a second switch circuit 240, and by setting the third radiator 250 corresponding to the connection edge 104 and controlling the second switch circuit 240, the directional diagram is further reconfigurable when the antenna assembly 20 supports the first target frequency band. The combination states of the first switch circuit 230 and the second switch circuit 240 are different, so that the antenna assembly 20 has different patterns when supporting the first target frequency band, and the antenna assembly 20 has more patterns when supporting the first target frequency band. When the electronic device 1 communicates with the satellite using the first target frequency band of the antenna assembly 20, the state of the first switch circuit 230 may be configured according to different postures of the electronic device 1 relative to the satellite, so as to have better traffic performance when communicating with the satellite using the first target frequency band.

Referring to fig. 8, fig. 8 is a schematic diagram illustrating identification of a part of components of the electronic device shown in fig. 7. The third radiator 250 includes a fifth end 251, a second connection point P3, a second ground point G2, and a sixth end 252, the second connection point P3 is electrically connected to the second switch circuit 240 to the reference ground 10, and the second ground point G2 is electrically connected to the reference ground 10 to be grounded.

In this embodiment, the second ground point G2 of the third radiator 250 is electrically connected to the reference ground 10 in a manner that the third radiator 250 is integrally formed with the reference ground 10, and the second ground point G2 of the third radiator 250 is electrically connected to the reference ground 10 through a connection branch; alternatively, the second ground point G2 of the third radiator 250 is electrically connected to the reference ground 10 through a matching circuit, wherein the matching circuit may be a zero ohm device; alternatively, the second ground point G2 of the third radiator 250 is electrically connected to the reference ground 10 through conductive paste or conductive wires.

In the present embodiment, the second ground point G2 of the third radiator 250 is electrically connected to the reference ground 10 so as to affect the distribution of the resonant current on the reference ground 10, so that the resonant current on the reference ground 10 is concentrated on the top of the reference ground 10, the current distribution at the bottom of the reference ground 10 is suppressed, and the lateral current (viewing angle) distribution on the reference ground 10 is increased. Thereby increasing the upper hemispherical radiation duty ratio of the antenna assembly 20 when operating in the first target frequency band, increasing the directivity of the antenna assembly 20 when supporting the first target frequency band, and increasing the antenna gain. When the electronic device 1 communicates with the satellite by using the first target frequency band of the antenna assembly 20, the communication effect is better.

Therefore, in the antenna assembly 20 of the electronic device 1 provided in the embodiment of the present application, the first radiator 210 is disposed corresponding to the top edge 101, the third radiator 250 is disposed corresponding to the connecting edge 104, and the second switch circuit 240 is used to control the antenna assembly 20 to support the first target frequency band, so that the directional diagram is reconfigurable. The antenna assembly 20 is realized to radiate the directional diagram towards the top edge 101 and the connecting edge 104 of the electronic device 1 when supporting the first target frequency band, so that the use requirement of the vertical screen of the electronic device 1 is met, the upper hemispherical radiation duty ratio of the electronic device 1 and the directivity of the antenna under the use scene of the vertical screen are improved, the gain of the circularly polarized antenna is improved, and the user experience is improved.

Referring to fig. 9, fig. 9 is a schematic diagram showing the identification of part of the components of the electronic device 1 shown in fig. 7. The distance Gap2 from the second ground point G2 to the top edge 101 satisfies formula (2):

wherein f1 is the operating frequency of the first target frequency band，εr ₂ For the dielectric constant of the medium around the third radiator 250, a is 0.7 to 1.5.

The working frequency of the first target frequency band is generally 1.97GHz-2.2GHz. When the third radiator 250 is wrapped with a medium such as a wrapping layer, the εr ₂ A dielectric constant that is the encapsulation layer; when the third radiator 250 is exposed to air without a coating, the medium surrounding the third radiator 250 is air, and the dielectric constant is 1.

The distance Gap2 from the second ground point G2 to the top edge 101 satisfies the formula (2), so that the third radiator 250 has a better adjustment effect on the directional diagram of the first target frequency band.

Note that Gap2 may be the same as Gap1 or may be different from Gap1, and is not limited in this embodiment.

Referring to fig. 10, 11, 12 and 13, fig. 10 is a schematic diagram of an electronic device in an unfolded state according to another embodiment; FIG. 11 is a schematic view of the electronic device shown in FIG. 10 in a folded state; FIG. 12 is a schematic view of a portion of the electronic device shown in FIG. 10; fig. 13 is a partial schematic structural view of the electronic apparatus shown in fig. 11. The electronic device 1 comprises a reference ground 10 and an antenna assembly 20. The antenna assembly 20 includes a first radiator 210, a feed S, a second radiator 220, and a first switching circuit 230. The first radiator 210 is disposed corresponding to the top of the reference ground 10, and the first radiator 210 has a first end 211, a feeding point P1, and a second end 212. The feed source S is electrically connected to the feeding point P1, and is configured to excite the first radiator 210 to generate a first resonant mode supporting a first target frequency band, where the first resonant mode is a balanced mode of the first radiator 210. The second radiator 220 is disposed corresponding to the reference ground 10, and the second radiator 220 is electrically connected to the reference ground 10. The first switching circuit 230 is electrically connected to the second radiator 220, and the first switching circuit 230 has a first state electrically disconnected from the reference ground 10, and a second state electrically connected to the reference ground 10. When the first switch circuit 230 is in the first state, the antenna assembly 20 has a first directivity pattern when supporting the first target frequency band; when the first switch circuit 230 is in the second state, the antenna assembly 20 has a second pattern when supporting the first target frequency band, wherein the second pattern is different from the first pattern.

The antenna assembly 20 is described above, and will not be described in detail herein.

In this embodiment, the reference ground 10 includes a first sub-reference ground 110 and a second sub-reference ground 120 that are foldable relative to a folding axis L0. The first sub-reference ground 110 includes a first top edge 111, a first side edge 112, a first bottom edge 113, and a first connecting edge 114 that are sequentially bent and connected, wherein the first connecting edge 114 is closer to the folding axis L0 than the first side edge 112. The first radiator 210 is disposed on a side of the first top edge 111 facing away from the first bottom edge 113. The second radiator 220 is disposed on a side of the first side 112 away from the first connection edge 114, the second radiator 220 includes a third end 221, a first connection point P2, a first ground point G1, and a fourth end 222, the first connection point P2 is electrically connected to the first switch circuit 230, and the first ground point G1 is electrically connected to the first sub-reference ground 110 for grounding.

The electronic apparatus 1 shown in the present embodiment is a foldable electronic apparatus. The electronic device 1 has a folded state and an unfolded state. It will be appreciated that the electronic device 1 also has an intermediate state between the folded state and the unfolded state. The electronic device 1 comprises a reference ground 10, which reference ground 10 may be, but is not limited to, a middle frame of the electronic device 1, or a shield of a display screen of the electronic device 1, or a battery cover of the electronic device 1, etc. The first sub-reference ground 110 may be rectangular or substantially rectangular, and correspondingly, the second sub-reference ground 120 may be rectangular or substantially rectangular. The shape of the first sub-reference land 110 and the second sub-reference land 120 is not limited in this embodiment. In the present embodiment, the state of the reference ground 10 is the same as the state of the electronic apparatus 1. When the reference ground 10 is in a folded state, the electronic device 1 is in a folded state; accordingly, when the reference ground 10 is in the unfolded state, the electronic apparatus 1 is in the unfolded state.

The folded state is a state in which the first sub-reference ground 110 and the second sub-reference ground 120 are layered on top of each other in the thickness direction (Z-axis direction), specifically, along the Z-axis direction, the first sub-reference ground 110 and the second sub-reference ground 120 are respectively disposed on top of each other and below each other. The unfolded state is that the overlapping area between the first sub-reference ground 110 and the second sub-reference ground 120 is smaller than a preset area, and the preset area is, for example, 20%, 15%, 10%, 5%, 1%, 0% of the area of the first sub-reference ground 110.

In one embodiment, the first sub-reference ground 110 and the second sub-reference ground 120 are rotatably connected by a rotation shaft 130. In the view of the drawing, the axial direction of the rotating shaft 130 is the Y-axis direction, and the arrangement direction of the second sub-reference ground 120 and the first sub-reference ground 110 is the X-axis positive direction. The first sub-reference ground 110 and/or the second sub-reference ground 120 are rotated about the rotation axis 130 to a folded state or an unfolded state. The embodiment of the present application is exemplified by the rotational connection of the first sub-reference ground 110 and the second sub-reference ground 120 through the rotation shaft 130. It will be appreciated that in other embodiments, the first sub-reference ground 110 and the second sub-reference ground 120 may be integrally formed, and the connection between the first sub-reference ground 110 and the second sub-reference ground 120 may be flexible and bendable. It should be understood that, in other embodiments, the first sub-reference ground 110 and the second sub-reference ground 120 may be connected by sliding, etc., so long as the first sub-reference ground 110 and the second sub-reference ground 120 have a folded state and an unfolded state, and the manner of changing the first sub-reference ground 110 and the second sub-reference ground 120 from the folded state to the unfolded state and from the unfolded state to the folded state is not limited in this embodiment.

Referring to fig. 10 and 11, in an embodiment, the electronic device 1 further includes a flexible display 50. The flexible display 50 is provided on the front side of the reference ground 10 (the front side refers to the direction toward the user when the user normally uses the flexible display 50). The flexible display 50 includes a first display portion 510, a bending portion 530, and a second display portion 520, which are sequentially arranged. The first display portion 510 is carried on the first sub-reference ground 110, and the second display portion 520 is carried on the second sub-reference ground 120. The first display portion 510 may be fixed to the first sub-reference ground 110 by, but not limited to, fixing by gluing, or screws. Accordingly, the second display part 520 may be fixed to the second sub-reference ground 120 by, but not limited to, fixing by gluing, or screws. The bending part 530 is disposed on the rotating shaft 130, and the connection mode between the bending part 530 and the rotating shaft 130 may be a fixed connection or a non-connection state. The bending part 530 is bent at the time of the electronic device 1, and its shape at the time of bending includes, but is not limited to, a drop type or a U type.

Referring to fig. 10 and 11, the electronic device 1 further includes a housing 60. The housing 60 includes a first housing 610 and a second housing 620. The first casing 610 is wrapped around the outside of the first sub-reference ground 110, and the second casing 620 is wrapped around the outside of the second sub-reference ground 120. The first housing 610 and the first sub-reference ground 110 may form a receiving space, and the second housing 620 and the second sub-reference ground 120 may form a receiving space. The accommodating space is also used for accommodating devices such as floors, camera modules, receiver modules, batteries, various sensors and the like.

It will be appreciated that when the electronic device 1 is in a folded state, the flexible display 50 may be covered and the housing 60 may be exposed, at which point the electronic device 1 may also be referred to as an in-folded electronic device. In other embodiments, the flexible display 50 may be exposed and the housing 60 may be covered when the electronic device 1 is in the unfolded state, and the electronic device 1 may be also referred to as an out-folded electronic device.

It should be understood that the foregoing description of one embodiment of the electronic device 1 is not to be construed as limiting the electronic device 1 provided in the embodiments of the present application. The present application is not limited as to whether the electronic device 1 includes a flexible display 50. In addition, the present application is not limited as to whether the electronic apparatus 1 includes the housing 60.

In the schematic diagram of the present embodiment, the folding axis L0 is illustrated as a vertical direction. The folding axis L0 is vertical, so that the first sub-reference ground 110 and the second sub-reference ground 120 can be folded left and right. It will be appreciated that in other embodiments, the folding axis L0 may be along other directions, such as, for example, the folding axis L0 may be transverse, depending on the pose of the electronic device 1. When the folding axis L0 is transverse, the first sub-reference ground 110 and the second sub-reference ground 120 can be folded up and down.

The first top edge 111 is the top-lying edge of the first sub-reference ground 110. The first bottom edge 113 is the edge of the first sub-reference ground 110 that is located at the bottom. The first bottom edge 113 is opposite to and spaced apart from the first top edge 111. The first side edge 112 and the first connecting edge 114 are edges of the first sub-reference ground 110 opposite to and spaced apart from the folding axis L0. Wherein the first connecting edge 114 is opposite to and spaced apart from the first side edge 112, and the first connecting edge 114 is adjacent to the folding axis L0 as compared to the first side edge 112.

As can be seen from the foregoing description, the first radiator 210 and the second radiator 220 are disposed corresponding to the first sub-reference ground 110. Therefore, in the present embodiment, the first radiator 210 and the second radiator 220 are disposed at the same sub-reference ground 10 among the reference grounds 10. When the electronic device 1 further includes the flexible display 50, the first radiator 210 and the second radiator 220 are disposed corresponding to the first display portion 510 of the flexible display 50. It can be seen that the first radiator 210 and the second radiator 220 are disposed on the same display portion of the flexible display screen 50. That is, the first radiator 210 and the second radiator 220 are disposed on the same screen side.

In the present embodiment, the electronic apparatus 1 is illustrated as an example of a portrait screen state. The first top edge 111 is the edge farthest from the ground in the first sub-reference ground 110 when the electronic device 1 is in the vertical screen state; the first bottom edge 113 is the edge closest to the ground in the first sub-reference ground 110 when the electronic device 1 is in use; the first side 112 and the first connection side 114 are both sides of the first sub-reference ground 110 of the electronic device 1 that are located at sides when the vertical screen is in use.

In this embodiment, the first reference ground 10 is rectangular or similar. In this embodiment, the length of the first side edge 112 is greater than the length of the first top edge 111, and the length of the first side edge 112 is greater than the length of the first bottom edge 113; the first connecting edge 114 has a length greater than the length of the first bottom edge 113, and the first connecting edge 114 has a length greater than the length of the first top edge 111. The length of the first top edge 111 is equal to or approximately equal to the length of the first bottom edge 113. The length of the first connecting edge 114 is equal to or approximately equal to the length of the first side edge 112.

The first radiator 210 is disposed corresponding to the first top edge 111, so that the first radiator 210 radiates toward the top of the electronic device 1 in a direction pattern when supporting the first target frequency band.

The second radiator 220 is disposed corresponding to the first side 112, and radiates toward the first side 112 under the action of the first switch circuit 230 when the antenna assembly 20 of the electronic device 1 supports the first target frequency band.

In this embodiment, the first ground point G1 of the second radiator 220 is electrically connected to the first sub-reference ground 110 in a manner that the second radiator 220 is integrally formed with the first sub-reference ground 110, and the first ground point G1 of the second radiator 220 is electrically connected to the first sub-reference ground 110 through a connection branch; alternatively, the first ground point G1 of the second radiator 220 is electrically connected to the first sub-reference ground 110 through a matching circuit, wherein the matching circuit may be a zero ohm device; alternatively, the first ground point G1 of the second radiator 220 is electrically connected to the first sub-reference ground 110 through conductive paste or conductive wires.

In the present embodiment, the first ground point G1 of the second radiator 220 is electrically connected to the first sub-reference ground 110 so as to affect the distribution of the resonant current on the first sub-reference ground 110, so that the resonant current on the first sub-reference ground 110 is concentrated on the top of the first sub-reference ground 110, the current distribution at the bottom of the first sub-reference ground 110 is suppressed, and the lateral current (viewing angle) distribution on the first sub-reference ground 110 is increased. Thereby increasing the upper hemispherical radiation duty ratio of the antenna assembly 20 when operating in the first target frequency band, increasing the directivity of the antenna assembly 20 when supporting the first target frequency band, and increasing the antenna gain. When the electronic device 1 communicates with the satellite by using the first target frequency band of the antenna assembly 20, the communication effect is better.

Therefore, in the antenna assembly 20 of the electronic device 1 provided in the embodiment of the present application, the first radiator 210 is disposed corresponding to the first top edge 111, the second radiator 220 is disposed corresponding to the first side edge 112, and the first switch circuit 230 is used to control the antenna assembly 20 to support the first target frequency band, so that the pattern is reconfigurable. The antenna assembly 20 is realized to radiate the directional diagram towards the first top edge 111 and radiate the first side edge 112 of the electronic device 1 when supporting the first target frequency band, so that the use requirement of the vertical screen of the electronic device 1 is met, the upper hemispherical radiation duty ratio of the electronic device 1 and the directivity of the antenna in the vertical screen use scene are improved, the circularly polarized antenna gain is improved, and the user experience is improved.

Referring to fig. 14, fig. 14 is a schematic diagram of a portion of the electronic device in fig. 13. The distance Gap3 from the first ground point G1 to the first top edge 111 satisfies the formula (3):

wherein f1 is the working frequency of the first target frequency band εr ₃ For the dielectric constant of the medium around the second radiator 220, a is 0.7 to 1.5. The working frequency of the first target frequency band is generally 1.97GHz-2.2GHz. When the second radiator 220 is wrapped with a medium such as a wrapping layer, the εr ₃ A dielectric constant that is the encapsulation layer; when the second radiator 220 is exposed to air without a coating layer, the medium surrounding the second radiator 220 is air, and the dielectric constant is 1.

The distance from the first ground point G1 to the first top edge 111 satisfies the above formula (3), so that the second radiator 220 has a better adjustment effect on the directional diagram of the first target frequency band.

Referring to fig. 15 and fig. 16, fig. 15 is a schematic view of a part of an electronic device according to another embodiment of the present disclosure; fig. 16 is a schematic view of a part of the structure of an electronic device according to another embodiment of the present application. The first radiator 210 is positioned in fig. 15 in correspondence with the second top edge 121; in fig. 16, the first radiator 210 is disposed in correspondence with the first top edge 111.

The electronic device 1 comprises a reference ground 10 and an antenna assembly 20. The antenna assembly 20 includes a first radiator 210, a feed S, a second radiator 220, and a first switching circuit 230. The first radiator 210 is disposed corresponding to the top of the reference ground 10, and the first radiator 210 has a first end 211, a feeding point P1, and a second end 212. The feed source S is electrically connected to the feeding point P1, and is configured to excite the first radiator 210 to generate a first resonant mode supporting a first target frequency band, where the first resonant mode is a balanced mode of the first radiator 210. The second radiator 220 is disposed corresponding to the reference ground 10, and the second radiator 220 is electrically connected to the reference ground 10. The first switching circuit 230 is electrically connected to the second radiator 220, and the first switching circuit 230 has a first state electrically disconnected from the reference ground 10, and a second state electrically connected to the reference ground 10. When the first switch circuit 230 is in the first state, the antenna assembly 20 has a first directivity pattern when supporting the first target frequency band; when the first switch circuit 230 is in the second state, the antenna assembly 20 has a second pattern when supporting the first target frequency band, wherein the second pattern is different from the first pattern.

The reference ground 10 includes a first sub-reference ground 110 and a second sub-reference ground 120 that are foldable relative to a fold axis L0. The first sub-reference ground 110 includes a first top edge 111, a first side edge 112, a first bottom edge 113, and a first connecting edge 114 that are sequentially bent and connected, wherein the first connecting edge 114 is closer to the folding axis L0 than the first side edge 112. The second sub-reference ground 120 includes a second top edge 121, a second side edge 122, a second bottom edge 123, and a second connecting edge 124 that are sequentially bent and connected, wherein the second top edge 121 is disposed adjacent to the first top edge 111 compared to the second bottom edge 123, the second connecting edge 124 is closer to the folding axis L0 compared to the second side edge 122, and the second connecting edge 124 is disposed opposite to the first connecting edge 114. The first radiator 210 is disposed corresponding to one of the first top edge 111 and the second top edge 121. The second radiator 220 is disposed corresponding to the other of the first top edge 111 and the second top edge 121.

The second top edge 121 is the top edge of the second sub-reference ground 120, and the second bottom edge 123 is the bottom edge of the second sub-reference ground 120. The second bottom edge 123 is opposite to and spaced apart from the second top edge 121. The second side 122 and the second connecting side 124 are opposite to and spaced apart from the folding axis L0 in the second sub-reference ground 120, wherein the second connecting side 124 is opposite to and spaced apart from the second side 122, and the second connecting side 124 is adjacent to the folding axis L0 compared with the second side 122.

In fig. 15, the first radiator 210 is disposed corresponding to the second top edge 121, and correspondingly, the second radiator 220 is disposed corresponding to the first top edge 111. In fig. 16, the first radiator 210 is disposed corresponding to the first top edge 111, and the second radiator 220 is disposed corresponding to the second top edge 121.

In summary, in the antenna assembly 20 of the electronic device 1 provided in the embodiment of the present application, the first radiator 210 is disposed corresponding to one of the first top edge 111 and the second top edge 121, and the first resonant mode is a balanced mode of the first radiator 210, so that the antenna assembly 20 has a better upper hemispherical duty ratio when supporting the first target frequency band. In addition, the antenna assembly 20 further includes a second radiator 220, where the second radiator 220 is disposed corresponding to the other of the first top edge 111 and the second top edge 121, so as to better guide the pattern of the first radiator 210 during operation. The antenna assembly 20 further comprises a first switching circuit 230, the first switching circuit 230 being electrically connected to the second radiator 220 and also to the reference ground 10. When the first switch circuit 230 is in a first state of being electrically disconnected from the reference ground 10, the antenna assembly 20 has a first pattern when supporting the first target frequency band; when the first switch circuit 230 is in a second state electrically connected to the reference ground 10, the antenna assembly 20 has a second pattern when supporting the first target frequency band. It follows that by configuring the state of the first switching circuit 230, a reconfiguration of the pattern when the antenna assembly 20 supports the first target frequency band can be achieved. When the antenna assembly 20 of the electronic device 1 is used for communication with a satellite, the state of the first switch circuit 230 can be configured according to different attitudes of the electronic device 1 relative to the satellite, so that the communication with the satellite by using the first target frequency band has better traffic performance.

Referring to fig. 17, fig. 17 is a schematic view of a part of an electronic device according to another embodiment of the present disclosure. The first target frequency band includes a transmit sub-band (Tx) and a receive sub-band (Rx). The first switch circuit 230 further includes a first switch 231 and a plurality of first matching devices 232. The first switch 231 may be electrically connected to one of the plurality of first matching devices 232 to ground. The antenna assembly 20 further includes a fourth radiator 270 and a third switching circuit 260. The fourth radiator 270 is disposed corresponding to the sub-reference ground 10 corresponding to the second radiator 220. The third switching circuit 260 includes a second switch and a plurality of second matching devices 262, the second switch being electrically connectable to one of the plurality of second matching devices 262 to ground. The first switching circuit 230 cooperates with the third switching circuit 260 to adjust the directivity pattern of the transmit and receive sub-bands when the antenna assembly 20 supports the first target frequency band.

The fourth radiator 270 is disposed corresponding to the sub-reference ground 10 corresponding to the second radiator 220, specifically: when the second radiator 220 is disposed corresponding to the first sub-reference ground 110, the fourth radiator 270 is disposed corresponding to the first sub-reference ground 110; when the second radiator 220 is disposed corresponding to the second sub-reference ground 120, the fourth radiator 270 is disposed corresponding to the second sub-reference ground 120. In the schematic diagram of the present embodiment, the first radiator 210 is disposed corresponding to the second sub-reference ground 120, and the second radiator 220 and the fourth radiator 270 are disposed corresponding to the first sub-reference ground 110, which is illustrated as an example, and it should be understood that the present embodiment is not limited thereto.

The first matching device 232 may include an inductor, a capacitor, and the like. When the first switch 231 is electrically connected to a different first matching device 232 to ground, the electrical length of the second radiator 220 is different. The second matching device 262 may include inductive, capacitive, etc. elements. The electrical length of the fourth radiator 270 is different when the second switch is electrically connected to a different second matching device 262 to ground.

The first switching circuit 230 cooperates with the third switching circuit 260 to adjust the directivity pattern of the transmit and receive sub-bands when the antenna assembly 20 supports the first target frequency band. In other words, the first switch circuit 230 is configured according to the first configuration parameter and the third switch circuit 260 is configured according to the second matching parameter, so that the patterns of the transmitting sub-band and the receiving sub-band when the antenna assembly 20 supports the first target band are preset patterns. When the first configuration parameters and the second matching parameters are different, the preset patterns are different. The details will be described later in connection with the simulation diagram.

The antenna assembly 20 provided in this embodiment further includes a fourth radiator 270 and a third switch circuit 260, where the third single-switch circuit is matched with the first switch circuit 230, so that the patterns of the transmitting sub-band and the receiving sub-band when the antenna assembly 20 supports the first target band can be adjusted, and thus the reconfigurability of the patterns of the transmitting sub-band of the first target band is achieved, and the reconfigurability of the patterns of the receiving sub-band of the first target band is achieved. When the antenna assembly 20 of the electronic device 1 is used to communicate with a satellite, the states of the first switch circuit 230 and the third switch circuit 260 can be configured according to different postures of the electronic device 1 relative to the satellite, so that the first target frequency band has better traffic performance in both the transmitting sub-band and the receiving sub-band when the first target frequency band is used to communicate with the satellite.

Referring to fig. 18, 19 and 20, fig. 18 is a schematic view of a part of the structure of an electronic device according to another embodiment of the present disclosure; FIG. 19 is a schematic diagram of a current distribution corresponding to a second resonant mode of the electronic device shown in FIG. 18; fig. 20 is a schematic view of a part of an electronic device according to another embodiment of the present application. The first radiator 210 further includes a second ground point G2, and the second ground point G2 is grounded. The feed source S is further configured to excite the first radiator 210 to generate a second resonant mode supporting a second target frequency band, where the second resonant mode is a monopole mode of the first radiator 210.

In this embodiment, the second ground point G2 of the first radiator 210 is electrically connected to the reference ground 10 in a manner that the first radiator 210 and the reference ground 10 are integrally formed, but not limited to, the second ground point G2 of the first radiator 210 is electrically connected to the reference ground 10 through a connection branch; alternatively, the second ground point G2 of the first radiator 210 is electrically connected to the reference ground 10 through a matching circuit, wherein the matching circuit may be a zero ohm device; alternatively, the second ground point G2 of the first radiator 210 is electrically connected to the reference ground 10 through conductive paste or conductive wires. The schematic diagrams in this embodiment (see fig. 18 and 20) are illustrated by taking the example that the second ground point G2 of the first radiator 210 is electrically connected to the reference ground 10 through a connection stub, and it should be understood that the embodiment of the present application is not limited thereto.

As can be seen from fig. 19, the monopole mode is also referred to as common mode radiation. The current corresponding to the second resonance mode comprises a first sub-current I1 and a second sub-current I2. The first sub-current is distributed between the first end 211 and the second ground point G2, and the second sub-current is distributed between the second end 212 and the second ground point G2. In the schematic diagram of the present embodiment, the first sub-current is directed from the first end 211 to the second ground point G2, and the second sub-current is directed from the second end 212 to the second ground point G2. It will be appreciated that in the next half wavelength period, the first sub-current is directed from the second ground point G2 to the first end 211 and the second sub-current is directed from the second ground point G2 to the second end 212. In an embodiment, the second target frequency band may be an intermediate frequency band of long term evolution (Long Term Evolution, LTE), for example, the resonance frequency point of the second resonance frequency band is 1.8GHz, and the directivity pattern is downward.

In this embodiment, the first radiator 210 may support not only the first target frequency band but also a second target frequency band, so that the electronic device 1 may not only work with the first target frequency band, but also work with the second target frequency band, so that the electronic device 1 may meet the communication requirements of the first target frequency band and the second target frequency band.

In addition, in the schematic diagram of the present embodiment, the antenna assembly 20 further includes a matching circuit M1. In an embodiment, the matching circuit M1 is configured to match an impedance between the first feed S and the first radiator 210, in other words, to match an impedance between a Radio Frequency (RF) port and the first radiator 210. In another embodiment, the matching circuit M1 is configured to tune a resonance frequency point of the first target frequency band. It will be appreciated that the embodiment of the present application does not limit whether the antenna assembly 20 includes the matching circuit M1.

In order to embody the advantages of the performance of the electronic apparatus 1 provided in the embodiment of the present application, the electronic apparatus 1 and the performance provided in the related art (not the related art) are described next.

Referring to fig. 21 and 22 together, fig. 21 is a schematic diagram of an electronic device in an unfolded state provided by the related art; fig. 22 is a schematic view of the electronic device of fig. 21 in a folded state. In the related art, the electronic device 1 includes a reference ground 10 and an antenna assembly 20. The reference ground 10 includes a first sub-reference ground 110 and a second sub-reference ground 120 that are foldable relative to a fold axis L0. The first sub-reference ground 110 has a first top edge 111. The antenna assembly 20 includes a first radiator 210 and a first feed S. The first end 211 is disposed in correspondence with the first top edge 111. The first radiator 210 includes a first end 211, a feeding point P1, a second ground point G2, and a second end 212. Wherein the first end 211 and the second end 212 are free ends. The second ground point G2 is grounded, and the feed source S is electrically connected to the feed point P1 to excite the first radiator 210 to support a first target frequency band. As can be seen by the structure of the first radiator 210, the first radiator 210 is also referred to as a T-shaped radiator and the antenna assembly 20 is also referred to as a T-shaped antenna. In one embodiment, the length of the first radiator 210 may be, but is not limited to, 49 millimeters (mm).

In the electronic device 1 provided in the related art, the antenna assembly 20 does not include a notch structure (i.e., does not include the second radiator 220 and does not include the first switching circuit 230).

Referring to fig. 23 together, fig. 23 is a schematic diagram of S-parameters of an antenna assembly in the electronic device shown in fig. 21 and 22. In the present schematic, the abscissa is frequency in GHz; the ordinate is the S Parameter (S Parameter) in dB. As can be seen from the schematic diagram, the antenna assembly 20 has two resonant modes, one of which is the first resonant mode (at the corresponding point 2), resonating around 2.0 GHz; the other resonant mode is the second resonant mode (at corresponding point 1), resonating around 1.8 GHz.

Referring to fig. 24 and 25 together, fig. 24 is a schematic diagram of the current when the electronic device shown in fig. 22 supports the first resonant mode; fig. 25 is a diagram illustrating the electronic device shown in fig. 22 supporting a first target frequency band. As can be seen from fig. 24, the first resonance mode is a balanced mode of the first radiator 210, i.e. the first resonance mode is a half wavelength mode from the first end 211 to the second end 212. In this schematic diagram, the resonant current corresponding to the first resonant mode flows from the second end 212 to the first end 211. It will be appreciated that in the next half-wavelength period, the resonant current corresponding to the first resonant mode flows from the first end 211 to the second end 212. As can be seen from fig. 25, if the first resonant mode is a balanced mode of the first radiator 210, the directional diagram when the antenna assembly 20 supports the first target frequency band is directional radiation of radiation toward the top of the electronic device 1, which is beneficial for satellite positioning when the electronic device 1 uses the first target frequency band to communicate with satellites.

Referring to fig. 26 and 27 together, fig. 26 is a schematic diagram of the current when the electronic device shown in fig. 22 supports the second resonant mode; fig. 27 is a diagram illustrating the electronic device shown in fig. 22 supporting a second target frequency band. The second resonant mode is also referred to as a monopole mode, which is also referred to as common mode radiation. The current corresponding to the second resonance mode comprises a first sub-current and a second sub-current. The first sub-current is distributed between the first end 211 and the second ground point G2, and the second sub-current is distributed between the second end 212 and the second ground point G2. In the schematic diagram of the present embodiment, the first sub-current is directed from the first end 211 to the second ground point G2, and the second sub-current is directed from the second end 212 to the second ground point G2. It will be appreciated that in the next half wavelength period, the first sub-current is directed from the second ground point G2 to the first end 211 and the second sub-current is directed from the second ground point G2 to the second end 212. As can be seen from fig. 27, the resonance frequency point of the second target frequency band is 1.8GHz, and the directional diagram is downward.

It follows that the pattern of the balanced mode is a directional radiation of radiation towards the top of the electronic device 1, facilitating satellite positioning when the electronic device 1 communicates with satellites.

Next, the communication performance of the electronic device 1 provided in the embodiment of the present application is simulated and described.

Referring to fig. 20 and fig. 28 together, fig. 28 is a block diagram of a first switch circuit in a first state when the electronic device in fig. 20 is in a folded state. In this embodiment, the matching circuit M1 is configured to perform impedance matching between the first feed S and the first radiator 210, in other words, perform impedance matching between a Radio Frequency (RF) port and the first radiator 210. In the present embodiment, the matching circuit M1 includes a capacitor C1 and an inductor L1 as an example. The feed source S is electrically connected with the inductor L1 to the feed point P1; one end of the capacitor C1 is electrically connected to a connection point of the feed source S and the inductor L1, and the other end of the capacitor C1 is grounded. When the first switch circuit 230 is turned off, i.e., the first switch circuit 230 is in the first state, the radiation pattern, the current distribution diagram, and the upper hemisphere duty cycle data of the antenna assembly 20 are shown in fig. 29, 30, and 31. FIG. 29 is a radiation pattern of the first switching circuit of FIG. 28 in a first state; FIG. 30 is a schematic diagram showing the current distribution of the first switch circuit in the first state; fig. 31 is a graph of upper hemispherical duty cycle data of the antenna assembly when the first switching circuit is in the first state. As can be seen from fig. 29, the directivity of the first switch circuit 230 in the first state is 5.479dBi toward the top of the electronic device 1, which is improved by about 1.5dBi compared to the directivity of the first target frequency band of the antenna assembly 20 provided in the related art. As can be seen from fig. 30, the resonant current is distributed not only to the first radiator 210 but also to the second radiator 220. As can be seen from fig. 31, the ratio of the abscissa data (0.16874) of point 2 to the abscissa data (0.2053) of point 1 for the upper hemispherical radiation is 82.19%, exceeding 80%.

Referring to fig. 32, 33, 34 and 35, fig. 32 is a block diagram of a first switch in a second state when the electronic device in fig. 20 is in a folded state; FIG. 33 is a radiation pattern of the first switch of FIG. 32 in a second state; FIG. 34 is a schematic diagram showing the current distribution of the first switch in the second state; fig. 35 is a graph of upper hemisphere data duty cycle data when the first switch circuit is in the second state. As can be seen in fig. 33, the pattern when the first switch circuit 230 is in the second state is towards the side 102 of the electronic device; as can be seen from fig. 34, the current is mainly distributed on the lower half branch of the second radiator 220; in fig. 35, the ordinate value of point 1 divided by the ordinate value of point 2 yields a specific value of the upper hemispherical radiation duty cycle; as can be seen in fig. 35, the upper hemispherical radiation fraction of the side 102 reaches about 70%.

Firstly, the pattern of the electronic device 1 in the related art when supporting the first target frequency band is simulated. Referring to fig. 36, fig. 36 is a schematic diagram illustrating a left-handed component and a right-handed component of the directivity pattern when the electronic device in fig. 22 supports the first target frequency band. Fig. 36 (a) is a schematic diagram of a left-hand component of the directional diagram when the electronic device 1 in the related art supports the first target frequency band; fig. 36 (b) is a schematic diagram of a right-hand component of the pattern when the electronic device 1 in the related art supports the first target frequency band.

Next, a pattern when the electronic device 1 provided in the embodiment of the present application supports the first target frequency band is simulated. Referring to fig. 37, fig. 37 is a schematic diagram of a left-hand component and a right-hand component of a directional diagram when the first switch circuit in the electronic device in fig. 8 is in the first state and supports the first target frequency band. Fig. 37 (a) is a schematic diagram of a left-hand component of a directional diagram when the first switch circuit in the electronic device in fig. 8 is in the first state and supports the first target frequency band; fig. 37 (b) is a schematic diagram of a right-hand component of a pattern when the first switching circuit in the electronic device 1 in fig. 8 is in the first state and supports the first target frequency band.

Referring to fig. 38, fig. 38 is a schematic diagram of a left-hand component and a right-hand component of a pattern supporting a first target frequency band when the first switch circuit in the electronic device in fig. 8 is in the second state. Fig. 38 (a) is a schematic diagram of a left-hand component of a pattern when the first switch circuit 230 in the electronic device 1 in fig. 8 is in the second state and supports the first target frequency band; fig. 38 (b) is a schematic diagram of a right-hand component of a pattern when the first switch circuit in the electronic device in fig. 8 is in the second state and supports the first target frequency band.

As can be seen from fig. 36 and 37, the electronic device 1 provided in the embodiment of the present application has improved left-handed directionality and right-handed directionality when the first switch circuit 230 is in the first state.

As can be seen from fig. 36 and 38, the electronic device 1 provided in the embodiment of the present application has improved left-handed directionality and right-handed directionality when the first switch circuit 230 is in the second state.

Referring to fig. 39, fig. 39 is a direction diagram of the electronic device in fig. 17 when supporting the first target frequency band in a state. The state in which the electronic device 1 is located may also be referred to as state 1, specifically, state 1 is: the first switch circuit 230 connects a capacitor of 0.5pF in series with the first switch 231 to ground, and the third switch circuit 260 is turned off, and the antenna assembly 202.0GHz receives and transmits at 2.2 GHz. Fig. 39 is a simulation performed based on the electronic apparatus 1 being in state 1. Wherein (a) in fig. 39 is a 3D pattern of a transmission sub-band (Tx) of the first target band; fig. 39 (b) is a left-hand component of a transmission sub-band (Tx) of the first target band; fig. 39 (c) is a 3D pattern of the reception sub-band (Rx) of the first target band; fig. 39 (d) is a left-hand component of the reception sub-band (Rx) of the first target band. The simulation is performed by taking 2.0GHz as a frequency point of a transmitting sub-frequency band of the first target frequency band and 2.2GHz as a frequency point of a receiving sub-frequency band of the first target frequency band as an example.

Referring to fig. 40, fig. 40 is a diagram illustrating a case where the electronic device in fig. 17 supports the first target frequency band in another state. The other state in which the electronic device 1 is located may also be referred to as state 2, specifically, state 2 is: the first switch circuit 230 has a capacitance of 1pF in series with the first switch 231 to ground, and the second switch of the third switch circuit 260 has a capacitance of 0.5pF in series with ground, and the antenna assembly 202.0GHz receives and transmits at 2.2 GHz. Fig. 40 is a simulation performed based on the electronic device 1 being in state 2. Wherein (a) in fig. 40 is a 3D pattern of a transmission sub-band (Tx) of the first target band; fig. 40 (b) is a left-hand component of a transmission sub-band (Tx) of the first target band; fig. 40 (c) is a 3D pattern of a reception sub-band (Rx) of the first target band; fig. 40 (d) is a left-hand component of a reception sub-band (Rx) of the first target band. The simulation is performed by taking 2.0GHz as a frequency point of a transmitting sub-frequency band of the first target frequency band and 2.2GHz as a frequency point of a receiving sub-frequency band of the first target frequency band as an example.

As can be seen from fig. 39 and 40, when the states of the first switch circuit 230 and the second switch circuit 240 are switched, the antenna assembly 20 supports the transmission frequency band and the reception frequency band of the first target frequency band to be greatly changed, so as to realize the switching of the beam. Furthermore, the maximum direction and right-hand circular polarization component overlap ratio of the pattern of the transmit sub-band (Tx) of the first target band of state 2 and the receive sub-band (Rx) of state 1 increases. When the electronic device 1 communicates with the satellite using the transmitting sub-band (Tx) of the first target band in state 2 and the receiving sub-band (Rx) in state 1, a better communication effect is achieved.

Referring to fig. 12 and fig. 41 together, fig. 41 is a schematic view of a part of an electronic device according to another embodiment of the present disclosure. The electronic device 1 comprises a first middle frame 30 and a second middle frame 40 foldable with respect to the folding axis L0. The first middle frame 30 includes a first frame body 310 and a first frame 320. The first frame 320 is disposed at least partially around the periphery of the first frame body 310. The second middle frame 40 includes a second frame body 410 and a second frame 420, and the second frame 420 is disposed at least partially around the second frame body 410. The first sub-reference ground 110 includes the first frame body 310, and the first radiator 210 and the second radiator 220 are formed on the first frame 320. The second sub-reference ground 120 includes the second frame body 410.

In the schematic view of the present embodiment, the first frame 320 in which the first radiator 210 and the second radiator 220 are formed in the first middle frame 30 is illustrated as an example. It will be understood that no limitation of the embodiments of the present application is to be interpreted. In this embodiment, the first radiator 210 and the second radiator 220 may be directly formed on the first frame 320 of the first middle frame 30, so that the functions of the first frame 320 of the first middle frame 30 are multiplexed, and the structure of the electronic device 1 is compact.

It is to be understood that the foregoing is by way of example only and is not to be construed as limiting the embodiments of the present application. The various radiators of the antenna assembly 20 in the electronic device 1 provided in other embodiments may also be formed on the frame of the middle frame of the electronic device 1.

Note that, the antenna assembly 20 provided in each embodiment of the present application may include the matching circuit M1, or may not include the matching circuit M1, which is not limited herein. The antenna assembly 20 may be incorporated into the antenna assembly 20 provided in any of the previous embodiments when the antenna assembly 20 includes the matching circuit M1. The function of the matching circuit M1 is described above, and will not be described herein.

In summary, the present embodiment provides a high-gain antenna scheme of an electronic device 1 with a reconfigurable pattern, where the first radiator 210 is used as a main radiating antenna and is located at the top of the electronic device 1, and the second radiator is disposed at the side 102 of the electronic device 1, so that the reconfigurable pattern is realized based on balanced mode radiation of the first radiator 210 and the guiding effect of the second radiator 220 on the pattern when the first main radiator supports the first target frequency band, and controlled by the first switch circuit 230. It may be realized that when the antenna assembly 20 supports the first target frequency band, the directivity pattern radiates towards the top and the side 102 of the electronic device 1, thereby meeting the requirement of the vertical screen use of the electronic device 1. Meanwhile, the hemispherical radiation duty ratio and the antenna directivity of the electronic equipment 1 in the horizontal and vertical screen scene are improved, so that the gain of the circularly polarized antenna is improved, and the user experience is improved. Therefore, the antenna assembly 20 of the electronic device 1 has a larger upper hemispherical duty cycle and better directivity when supporting the first target frequency band. That is, compared to the related art, the electronic device 1 provided in the embodiment of the present application can increase the upper hemispherical duty ratio and the antenna directivity when supporting the first target frequency band. In addition, the gain of the left-handed antenna and the gain of the right-handed antenna can be improved. In addition, the antenna assembly 20 provided in the embodiment of the present application may support the first target frequency band with a reconfigurable pattern. In addition, in an embodiment, the present application provides a high-gain antenna scheme of the electronic device 1 with a reconfigurable pattern, the first radiator 210 is used as a main radiating antenna and is located on the top of the electronic device 1, the second radiator is disposed on the top side 101 of the electronic device 1, the first radiator 210 is disposed corresponding to one of the first top side 111 and the second top side 121, and the second radiator 220 is disposed corresponding to the other of the first top side 111 and the second top side 121. Based on the balanced mode radiation of the first radiator 210 and the guiding effect of the second radiator 220 on the pattern when the first main radiator supports the first target frequency band, the first switching circuit 230 controls the first main radiator to realize the reconstruction of the pattern. It may be realized that when the antenna assembly 20 supports the first target frequency band, the directivity pattern radiates towards the top and the side 102 of the electronic device 1, thereby meeting the requirement of the vertical screen use of the electronic device 1. Meanwhile, the hemispherical radiation duty ratio and the antenna directivity of the electronic equipment 1 in the horizontal and vertical screen scene are improved, so that the gain of the circularly polarized antenna is improved, and the user experience is improved.

In addition, the fourth radiator 270 is disposed and matched by the first switch circuit 230 and the third switch circuit 260 to adjust the patterns of the transmitting sub-band and the receiving sub-band of the antenna assembly 20 supporting the first target band. When the transmitting sub-band and the receiving sub-band of the first target band of the antenna assembly 20 of the electronic device 1 are used for communication with the satellite, the states of the first switch circuit 230 and the third switch circuit 260 can be configured according to different postures of the electronic device 1 relative to the satellite, so that the electronic device 1 has better communication performance when the transmitting sub-band and the receiving sub-band of the first target band are used for communication with the satellite.

In another dimension, the arrangement of the second, third and fourth radiators 220, 250, 270 may change the current distribution on the reference ground 10, and thus any of the second, third and fourth radiators 220, 250, 270 may be referred to as a notch (wavetrap) structure.

In an embodiment, the antenna assembly 20 includes not only the second radiator 220 but also the third radiator 250, so that the directivity and the reconfigurable dimension of the directivity and the pattern of the antenna assembly 20 supporting the first target frequency band can be further improved.

In an embodiment, the antenna assembly 20 includes not only the third radiator 250 but also the fourth radiator 270, so that the directivity and the reconfigurable dimension of the directivity and the pattern of the antenna assembly 20 supporting the first target frequency band can be further improved.

While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the present application, and that variations, modifications, alternatives and alterations of the above embodiments may be made by those skilled in the art within the scope of the present application, which are also to be regarded as being within the scope of the protection of the present application.

Claims

1. An electronic device comprising a reference ground and an antenna assembly, the antenna assembly comprising:

2. The electronic device of claim 1, wherein the reference ground comprises a top edge, a side edge, a bottom edge, and a connecting edge that are sequentially bent and connected;

the first radiator is arranged corresponding to the top edge;

the second radiator is arranged corresponding to the side edge and comprises a third end, a first connecting point, a first grounding point and a fourth end, wherein the first connecting point is electrically connected to the first switch circuit to the reference ground, and the first grounding point is electrically connected to the reference ground to be grounded.

3. The electronic device of claim 2, wherein a distance Gap1 from the first ground point to the top edge satisfies:

wherein f1 is the operating frequency of the first target frequency band ε _r1 For the dielectric constant of the medium around the second radiator, a is 0.7 to 1.5.

4. The electronic device of claim 2, wherein the antenna assembly further comprises:

the third radiator is arranged corresponding to the connecting edge;

a second switching circuit electrically connected to the third radiator, the second switching circuit having a third state electrically disconnected from the reference ground, and a fourth state electrically connected to the reference ground, wherein a pattern of the second switching circuit in the fourth state is different from a pattern of the second switch in the fourth state;

and the second switch circuit is matched with the first switch circuit to adjust the directional diagram when the antenna component supports the first target frequency band.

5. The electronic device of claim 4,

the third radiator comprises a fifth end, a second connection point, a second grounding point and a sixth end, wherein the second connection point is electrically connected to the second switch circuit, and the second grounding point is electrically connected to the reference ground for grounding.

6. The electronic device of claim 5, wherein a distance Gap2 from the second ground point to the top edge satisfies:

wherein f1 is the operating frequency, ε, of the first target frequency band _r2 For the dielectric constant of the medium around the third radiator, a is 0.7 to 1.5.

7. The electronic device of claim 1, wherein the reference ground comprises a first sub-reference ground and a second sub-reference ground that are foldable relative to a folding axis;

the first sub-reference ground comprises a first top edge, a first side edge, a first bottom edge and a first connecting edge which are sequentially bent and connected, wherein the first connecting edge is closer to the folding axis than the first side edge;

the first radiator is arranged on one side of the first top edge, which is away from the first bottom edge;

the second radiator is arranged on one side, deviating from the first connecting edge, of the first side edge, the second radiator comprises a third end, a first connecting point, a first grounding point and a fourth end, the first connecting point is electrically connected to the first switch circuit to the reference ground, and the first grounding point is electrically connected to the first sub-reference ground to be grounded.

8. The electronic device of claim 7, wherein a distance Gap3 from the first ground point to the first top edge satisfies:

Wherein f1 is the operating frequency of the first target frequency band ε _r3 For the dielectric constant of the medium around the second radiator, a is 0.7 to 1.5.

9. The electronic device of claim 1, wherein the reference ground comprises a first sub-reference ground and a second sub-reference ground that are foldable relative to a folding axis;

the second sub-reference ground comprises a second top edge, a second side edge, a second bottom edge and a second connecting edge which are sequentially bent and connected, wherein the second top edge is adjacent to the first top edge compared with the second bottom edge, the second connecting edge is closer to the folding axis compared with the second side edge, and the second connecting edge is opposite to the first connecting edge;

the first radiator is arranged corresponding to one of the first top edge and the second top edge;

the second radiator is disposed corresponding to the other of the first top edge and the second top edge.

10. The electronic device of claim 9, wherein the first target frequency band comprises a transmit sub-band and a receive sub-band;

The first switching circuit further comprises a first switch and a plurality of first matching devices, the first switch being electrically connectable to one of the plurality of first matching devices to ground;

the antenna assembly further comprises:

a fourth radiator disposed corresponding to the sub-reference ground corresponding to the second radiator; and

A third switching circuit comprising a second switch and a plurality of second matching devices, the second switch being electrically connectable to one of the plurality of second matching devices to ground;

the first switching circuit cooperates with the third switching circuit to adjust a pattern of transmit and receive sub-bands of the antenna assembly supporting a first target band.

11. The electronic device of claim 1, wherein the first radiator further comprises a second ground point, the second ground point being grounded, the feed source further for exciting the first radiator to produce a second resonant mode supporting a second target frequency band, wherein the second resonant mode is a monopole mode of the first radiator.