CN118099709A

CN118099709A - Electronic equipment

Info

Publication number: CN118099709A
Application number: CN202211455397.4A
Authority: CN
Inventors: 张小伟; 王泽东
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-11-21
Filing date: 2022-11-21
Publication date: 2024-05-28
Also published as: WO2024109272A1

Abstract

An electronic device includes a foldable body and an antenna device; the foldable main body comprises a first main body and a second main body which can be folded relatively and has a folded state and an unfolded state; the antenna device comprises a first antenna component and a second antenna component which are respectively arranged on the first main body and the second main body; the first antenna component comprises a first radiator, a first feed source and a first matching circuit, wherein the first feed source generates an excitation signal of a first frequency band, the first radiator comprises a first sub radiator and a second sub radiator which are arranged at intervals, and the first sub radiator and the second sub radiator are respectively and electrically connected to the first feed source and the first matching circuit; the second antenna assembly comprises a second radiator and a second feed source which are electrically connected, the second feed source is used for generating excitation signals of a second frequency band, and the first frequency band and the second frequency band are different; when the foldable main body is in an unfolding state, the first feed source is also electrically connected to the first matching circuit so as to adjust the phase of the excitation signal of the first frequency band; the second sub-radiator acts as a parasitic branch of the second radiator when the foldable body is in the folded state.

Description

Electronic equipment

Technical Field

The present application relates to the field of communications technologies, and in particular, to an electronic device.

Background

With the development of technology, electronic devices such as mobile phones with communication functions have become more and more popular and more powerful. An antenna assembly is typically included in an electronic device to enable communication functions of the electronic device. However, the performance of the antenna assembly in the related art electronic device is not good enough, and there is room for improvement.

Disclosure of Invention

In a first aspect, the present application provides an electronic device comprising:

The foldable main body comprises a first main body and a second main body which can be relatively folded and has a folding state and an unfolding state; and

The antenna device comprises a first antenna component arranged on the first main body and a second antenna component arranged on the second main body;

the first antenna component comprises a first radiator, a first feed source and a first matching circuit, wherein the first feed source is used for generating excitation signals of a first frequency band, the first radiator comprises a first sub radiator and a second sub radiator which are arranged at intervals, the first sub radiator is electrically connected to the first feed source, and the second sub radiator is electrically connected to the first matching circuit;

The second antenna assembly comprises a second radiator and a second feed source, wherein the second feed source is used for generating excitation signals of a second frequency band and is electrically connected with the second radiator, and the second frequency band is different from the first frequency band;

When the foldable main body is in an unfolding state, the first feed source is further electrically connected to a first matching circuit, and the first matching circuit is used for adjusting the phase of an excitation signal of the first frequency band; the second sub-radiator is coupled with the second radiator to act as a parasitic stub for the second radiator when the foldable body is in the folded state.

According to the electronic device provided by the embodiment of the application, when the foldable main body is in the unfolded state, the first feed source directly excites the first sub-radiator, and the first feed source also directly excites the second sub-radiator, so that the first feed source can better excite the first sub-radiator and the second sub-radiator, and the first antenna component has larger bandwidth and better antenna performance such as system radiation efficiency when supporting the receiving and transmitting of electromagnetic wave signals of the first frequency band. In addition, the first matching circuit adjusts the phase of the excitation signal of the first frequency band, so that the first frequency band supported by the first sub-radiator and the second sub-radiator has higher resonance efficiency in the band. When the foldable body is in a folded state, the second sub-radiator is coupled with the second radiator and acts as a parasitic stub of the second radiator, so that the antenna performance of the second antenna assembly can be improved. In addition, compared with the related art, the antenna performance of the first antenna component and the antenna performance of the second antenna component can be improved by utilizing one radiation branch of the second sub-radiator, so that one radiation branch is saved, the occupied space of one radiation branch is smaller, and the space utilization rate of the electronic equipment is improved.

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 some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

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

FIG. 2 is a schematic view of the electronic device shown in FIG. 1 in a folded state;

FIG. 3 is a schematic view of a portion of the electronic device of FIG. 1;

Fig. 4 is a schematic diagram illustrating a deformation of the antenna device in the electronic device in fig. 2 in a folded state;

FIG. 5 is a schematic view of a part of an electronic device with a foldable main body in an unfolded state according to an embodiment;

fig. 6 is a schematic diagram of a variation of the antenna device of fig. 5 when the foldable body is in a folded state;

FIG. 7 is a block diagram of an electronic device according to an embodiment of the present application;

FIG. 8 is a schematic view of a portion of an electronic device with a foldable body in an unfolded state;

fig. 9 is a schematic diagram showing a variation of the antenna device when the foldable body of fig. 8 is in a folded state;

FIG. 10 is a schematic circuit diagram of the third matching circuit and a switch connected to the third matching circuit in FIG. 8;

Fig. 11 is a schematic view of a part of the structure of an electronic device in which a foldable body according to another embodiment is in an unfolded state;

fig. 12 is a schematic diagram showing a variation of the antenna device of fig. 11 when the foldable body is in a folded state;

fig. 13 is a schematic view of a part of an electronic device provided in another embodiment with a foldable main body in an unfolded state;

fig. 14 is a schematic diagram showing a variation of the antenna device of fig. 13 when the foldable body is in a folded state;

FIG. 15 is a schematic view of a portion of an electronic device with a foldable body in an unfolded state;

fig. 16 is a schematic diagram showing a variation of the antenna device of fig. 15 when the foldable body is in a folded state;

fig. 17 is a schematic diagram of a first antenna assembly according to an embodiment;

Fig. 18 is a schematic diagram of S parameters of a first antenna assembly and S parameters of a single branch antenna in the related art;

Fig. 19 is a schematic diagram showing the system radiation efficiency and the system radiation efficiency of the first antenna assembly and the system radiation efficiency and the system total efficiency of the single branch antenna in the related art.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without any inventive effort, are intended to be within the scope of the application.

Reference herein to "an embodiment" or "implementation" means that a particular feature, structure, or characteristic described in connection with the embodiment or implementation may be included in at least one embodiment of the 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.

Referring to fig. 1 to fig. 4 together, fig. 1 is a schematic structural diagram of an electronic device in an unfolded state according to an embodiment of the present application; FIG. 2 is a schematic view of the electronic device shown in FIG. 1 in a folded state; FIG. 3 is a schematic view of a portion of the electronic device of FIG. 1; fig. 4 is a schematic diagram illustrating a variation of the antenna device in the electronic apparatus shown in fig. 2 in a folded state. For convenience of illustration, only a part of the schematic structure of the electronic device is illustrated in fig. 3, and the display screen and the housing are omitted in fig. 3 compared with fig. 1. In fig. 4, when the electronic device 1 is in a folded state, the first antenna assembly 210 and the second antenna assembly 220 are partially stacked and shielded, for convenience in illustration, the second antenna assembly 220 of the electronic device 1 in the folded state is moved upward compared with the first antenna assembly 210, and the second feed source S2 and the ground symbol in the second antenna assembly 220 are turned to the side of the second radiator 221 facing away from the first antenna assembly 210. Therefore, fig. 4 does not show the actual relative positional relationship between the first antenna assembly 210 and the second antenna assembly 220 when the electronic device 1 is in the folded state, and the positional relationship between the first antenna assembly 210 and the second antenna assembly 220 when the electronic device 1 is in the folded state can be obtained with reference to fig. 1 to 3. In the schematic diagrams of the following embodiments, the deformation schematic diagrams of the antenna device when the foldable main body or the electronic device is in the folded state and the relative positional relationship between the foldable main body or the electronic device in the unfolded state of the corresponding embodiments are all adaptively modified as shown in fig. 3 and fig. 4, and should not be construed as limiting the embodiments of the present application. The present application provides a foldable electronic device 1, where the electronic device 1 may be a foldable device such as a mobile phone, a tablet computer, a desktop computer, a laptop computer, an electronic reader, a handheld computer, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, a cellular phone, a Personal Digital Assistant (PDA), an augmented reality (augmented reality, AR), a Virtual Reality (VR) device, a media player, an intelligent wearable device, etc. It will be appreciated that the electronic device 1 may be a foldable display device or a foldable non-display device. In the present application, the electronic device 1 is taken as an example of a folding mobile phone, and other devices may refer to the specific description in the present application.

Referring to fig. 3, the electronic device 1 includes a foldable main body 10 and an antenna device 20. The foldable body 10 has an unfolded state and a folded state. The unfolded state is also referred to as an uncapped state, or uncapped. The folded state is also referred to as a closed state, or closed.

The foldable body 10 is a skeletal structure of the electronic device 1. The body form of the foldable body 10 corresponds to the body form of the electronic device 1. When the foldable body 10 is in the unfolded state, the electronic apparatus 1 is in the unfolded state; when the foldable body 10 is in the folded state, the electronic device 1 is in the folded state. Specifically, the foldable body 10 includes, but is not limited to, a center of the electronic device 1. In this and the following embodiments, the foldable main body 10 is exemplified as a middle frame of the electronic device 1.

In the schematic diagram of the present embodiment, the electronic device 1 is illustrated as an example of a foldable electronic device. The foldable electronic device 1 means that when the electronic device 1 is in a folded state, the display 30 of the electronic device 1 is located inside, and the housing 40 is exposed outside. In other embodiments, the electronic device 1 may be a fold-out electronic device. By out-folding electronic device 1, it is meant that when the electronic device 1 is in a folded state, the display 30 is exposed to the outside and the housing 40 is located inside. The present application is not limited to the electronic device 1 being an inward folding electronic device or an outward folding electronic device.

When the foldable main body 10 is in the unfolded state, the foldable main body 10 may be in a flattened shape of 180 ° or a flattened shape of approximately 180 ° (e.g. 170 °, or 175 °, or 185 °), or a bent shape with a certain bending angle, and the bending angle is not limited. In this embodiment, a flattened shape having an expanded state of 180 ° is taken as an example. When the electronic device 1 has the display screen 30, the display screen 30 has a relatively large unfolded area in the unfolded state so that the user can enjoy the electronic device 1 of the large display screen 30. The folded state is a state in which the foldable main body 10 is folded and stacked, and at this time, the electronic apparatus 1 has a small overall size and is easy to carry.

Alternatively, the foldable body 10 includes, but is not limited to, a fold-over structure having one rotation axis L0, and may be a fold-over structure having two or more rotation axes L0, a three-fold, four-fold, or the like. The present embodiment will be described taking the foldable body 10 as an example of a folded structure.

Referring to fig. 2, the foldable main body 10 includes a first main body 110 and a second main body 120 rotatably connected, and in this embodiment, at least one of the first main body 110 and the second main body 120 is rotatably connected through a rotation shaft 130. In other words, the foldable body 10 includes a first body 110, a rotation shaft 130, and a second body 120, which are sequentially connected. In other embodiments, the first body 110 and the second body 120 are directly connected, and the connection between the first body 110 and the second body 120 is bendable. The mode of bending the foldable body 10 is not limited in the embodiment of the present application, as long as the foldable body 10 can be bent.

It should be noted that at least a portion of the first body 110 of the foldable body 10 is made of a conductive material, at least a portion of the second body 120 of the foldable body 10 is made of a conductive material, and the first body 110 is electrically connected to the second body 120. When the foldable main body 10 further includes a rotating shaft 130, at least a portion of the rotating shaft 130 is made of a conductive material, and the first main body 110 is electrically connected to the second main body 120 through the rotating shaft 130. It follows that the foldable body 10 may serve as a reference ground (also referred to as ground pole) for the antenna device 20.

Optionally, referring to fig. 2, the electronic device 1 further includes a display screen 30. The display 30 is disposed on one side of the foldable body 10, and in this embodiment, the display 30 is disposed on a front side of the foldable body 10 (the front side refers to a direction facing the user when the user uses the display 30 normally), and optionally, in one embodiment, a portion of the display 30 corresponding to the rotation axis 130 is a flexible display 30 that is bendable. Alternatively, in another embodiment, the display screen 30 is not disposed at a position corresponding to the rotation shaft 130, but two display screens 30 are disposed at front sides of the first body 110 and the second body 120, respectively.

Optionally, referring to fig. 2, the electronic device 1 further includes a housing 40. The housing 40 includes a rim 410 and a rear cover 420. When the electronic device 1 is in the flattened state or the approximately flattened state, the display screen 30 and the rear cover 420 are respectively located at two opposite sides (front and rear sides) of the foldable main body 10, wherein the frame 410 is connected between the display screen 30 and the rear cover 420 and surrounds the periphery of the foldable main body 10, and the display screen 30, the frame 410 and the rear cover 420 form a relatively closed whole machine for the electronic device 1. Of course, in other embodiments, the rear side of the electronic device 1 may also be provided with the display screen 30.

The frame 410 and the rear cover 420 may be an integral structure or a split structure. When the frame 410 and the rear cover 420 are in a separate structure, the interior of the frame 410 may be formed as an integral structure with the middle frame (foldable body 10). The middle frame is formed with a plurality of mounting grooves for mounting various electronic devices. After the display screen 30, the middle frame and the rear cover 420 are closed, a receiving space is formed on both sides of the middle frame. The electronic device 1 further includes a circuit board (including a main board, an auxiliary board, a flexible circuit board, etc.), a battery, a camera module, a microphone, a receiver, a speaker, a face recognition module, a fingerprint recognition module, etc. disposed in the accommodating space, which are capable of implementing the basic functions of the mobile phone, and will not be described in detail in this embodiment. It should be understood that the above description of the electronic device 1 is merely illustrative of one environment in which the antenna device 20 is applied, and the specific structure of the electronic device 1 should not be construed as limiting the antenna device 20 provided by the present application.

The antenna device 20 may be provided inside a housing 40 of the electronic apparatus 1. The antenna device 20 is configured to transmit and receive radio frequency signals, where the radio frequency signals are transmitted as electromagnetic wave signals in an air medium, so as to implement a communication function of the electronic device 1. The position of the antenna device 20 on the electronic device 1 is not particularly limited in the present application, and the position of the antenna device 20 on the electronic device 1 shown in fig. 1 is only an example.

The structure of the antenna device 20 will be described below. The antenna device 20 includes a first antenna assembly 210 disposed on the first body 110 and a second antenna assembly 220 disposed on the second body 120. The first antenna component 210 includes a first radiator 211, a first feed source S1, and a first matching circuit M1. The first feed source S1 is used for generating excitation signals of a first frequency band. The first radiator 211 includes a first sub-radiator 2111 and a second sub-radiator 2112 that are disposed at intervals, the first sub-radiator 2111 is electrically connected to the first feed source S1, and the second sub-radiator 2112 is electrically connected to the first matching circuit M1. The second antenna assembly 220 includes a second radiator 221 and a second feed source S2, where the second feed source S2 is configured to generate an excitation signal in a second frequency band, and is electrically connected to the second radiator 221, where the second frequency band is different from the first frequency band. When the foldable body 10 is in the unfolded state, the first feed source S1 is further electrically connected to a first matching circuit M1, and the first matching circuit M1 is configured to adjust the phase of the excitation signal in the first frequency band. The second sub-radiator 2112 is coupled to the second radiator 221 to act as a parasitic branch of the second radiator 221 when the foldable body 10 is in a folded state.

The shape of the first sub-radiator 2111 is not particularly limited in the present application. For example, the shape of the first sub-radiator 2111 includes, but is not limited to, a bar, a sheet, a rod, a coating, a film, and the like. The first sub-radiator 2111 shown in the schematic view of the present embodiment is only an example, and the shape of the first sub-radiator 2111 provided by the present application is not limited. Alternatively, when the frame is made of a conductive material, the first sub-radiator 2111 may be integrated with the frame, that is, the first sub-radiator 2111 is a frame antenna, and a portion of the frame is the first sub-radiator 2111. Still alternatively, the first sub-radiator 2111 may also be a part of the middle frame (i.e., the foldable body 10), so that the first sub-radiator 2111 and the middle frame are interconnected as a unitary structure. The first sub-radiator 2111 may be formed by cutting a slit in the middle frame. In this embodiment, the frame portion corresponding to the first sub-radiator 2111 may be made of a non-conductive material, so that the first sub-radiator 2111 can transmit and receive electromagnetic wave signals through the frame. Still alternatively, the antenna formed by the first sub-radiator 2111 is a bracket antenna. Among them, the bracket antenna includes, but is not limited to, a flexible circuit board antenna molded on a flexible circuit board (Flexible Printed Circuit board, FPC), a laser direct Structuring antenna by Laser Direct Structuring (LDS), a printed direct Structuring antenna by Printing Direct Structuring (PDS), a conductive patch antenna, and the like.

Optionally, the material of the first sub-radiator 2111 is a conductive material, and specific materials include, but are not limited to, metals such as copper, gold, silver, etc., or alloys formed by copper, gold, silver, etc., and other materials; or other non-metallic conductive materials such as oxide conductive materials such as metal oxide conductive materials (e.g., indium tin oxide, gallium indium tin oxide), or carbon nanotubes and polymers forming mixed conductive materials, etc.

The first feed S1 is electrically connected to the first sub-radiator 2111. The first feed source S1 includes, but is not limited to, a radio frequency transceiver chip and a radio frequency front-end circuit. Typically, the first feed S1 is disposed on a motherboard of the electronic device 1.

The first sub-radiator 2111 is electrically connected to the first feed source S1, and the first feed source S1 generates an excitation signal in a first frequency band, so that the first feed source S1 can directly excite the first sub-radiator 2111, and the first sub-radiator 2111 can support the receiving and transmitting of electromagnetic wave signals in the first frequency band.

The first matching circuit M1 includes a capacitor, an inductor, a series connection of a capacitor and an inductor, or a parallel connection of a capacitor and an inductor.

The structure of the first matching circuit M1 is not limited, as long as the phase of the excitation signal in the first frequency band can be adjusted. For example, the phase of the excitation signal of the first frequency band output by the first feed source S1 is a first phase, and the first matching circuit M1 receives the excitation signal of the first frequency band of the first phase and outputs the excitation signal of the first frequency band of a second phase, where the second phase is different from the first phase. It can be seen that the phase of the excitation signal reaching the first frequency band of the first sub-radiator 2111 is different from the phase of the excitation signal reaching the first frequency band of the second sub-radiator 2112 due to the effect of the first matching circuit M1. The first matching circuit M1 adjusts the phase of the excitation signal in the first frequency band, so that when the first antenna assembly 210 radiates the electromagnetic wave signal in the first frequency band, a pit with system radiation efficiency (where the pit indicates that the system radiation efficiency is lower) is located outside the bandwidth of the first frequency band. In other words, the first matching circuit M1 adjusts the phase of the excitation signal in the first frequency band, so that the first antenna assembly 210 has a higher system radiation efficiency within the bandwidth of the electromagnetic wave signal radiating the first frequency band, thereby improving the antenna performance of the first antenna assembly 210.

In addition, when the foldable main body 10 is in the folded state, since the second sub-radiator 2112 is used as a parasitic branch of the second radiator 221, the second sub-radiator 2112 supports the transmission and reception of the electromagnetic wave signal in the second frequency band, so the first matching circuit M1 is further configured to adjust the resonance frequency point of the electromagnetic wave signal transmitted and received by the second sub-radiator 2112, thereby improving the antenna performance of the second antenna assembly 220 when the foldable main body 10 is in the folded state.

The first matching circuit M1 is configured to enable the first antenna assembly 210 to support the first frequency band when the foldable main body 10 is in the unfolded state, and has a first resonant frequency point and a second resonant frequency point in the first frequency band, where the first resonant frequency point and the second resonant frequency point are different.

One of the first and second sub-radiators 2111 and 2112 resonates at the first resonance frequency point, and the other of the first and second sub-radiators 2111 and 2112 resonates at the second resonance frequency point. In other words, the first sub-radiator 2111 resonates at one of the first resonance frequency point and the second resonance frequency point, and the second sub-radiator 2112 resonates at the other of the first resonance frequency point and the second resonance frequency point.

The first matching circuit M1 enables the second phase output by the first matching circuit M1 to be a preset phase according to a preset matching parameter, so that the first frequency band supported by the first sub-radiator 2111 and the second sub-radiator 2112 has higher resonance efficiency.

The shape of the second sub-radiator 2112 is not particularly limited in the present application. For example, the shapes of the second sub-radiator 2112 include, but are not limited to, a stripe, a sheet, a rod, a coating, a film, and the like. The second sub-radiator 2112 shown in the schematic view of the present embodiment is only an example, and the shape of the second sub-radiator 2112 provided by the present application is not limited. Alternatively, when the bezel is made of a conductive material, the second sub-radiator 2112 may be integrated with the bezel, that is, the second sub-radiator 2112 is a bezel antenna, and a portion of the bezel is the second sub-radiator 2112. Still alternatively, the second sub-radiator 2112 may also be a part of the middle frame (i.e., the foldable body 10), so that the second sub-radiator 2112 is interconnected with the middle frame as a unitary structure. The second sub-radiator 2112 may be formed by cutting a slit in the middle frame. In this embodiment, the frame portion corresponding to the second sub-radiator 2112 may be made of a non-conductive material, so that the second sub-radiator 2112 can transmit and receive electromagnetic wave signals through the frame. Still alternatively, the antenna formed by the second sub-radiator 2112 is a bracket antenna. Among them, the bracket antenna includes but is not limited to FPC antenna, LDS antenna, PDS antenna, conductive sheet antenna, and the like. The type of the second sub-radiator 2112 may be the same as the type of the first sub-radiator 2111, or may be different from the type of the first sub-radiator 2111, and is not limited in the present application.

Optionally, the second sub-radiator 2112 is made of a conductive material, and specific materials include, but are not limited to, metals such as copper, gold, silver, or alloys formed by copper, gold, and silver and other materials; or other non-metallic conductive materials such as oxide conductive materials such as metal oxide conductive materials (e.g., indium tin oxide, gallium indium tin oxide), or carbon nanotubes and polymers forming mixed conductive materials, etc. The material of the second sub-radiator 2112 may be the same as that of the first sub-radiator 2111, or may be different from that of the first sub-radiator 2111, and is not limited in this embodiment.

In the present embodiment, the first radiator 211 is illustrated as being located on the top (view angle) of the first body 110, and the second radiator 221 is illustrated as being located on the top of the second body 120. It will be appreciated that in other embodiments, the first radiator 211 may also be located at the bottom of the first body 110, and correspondingly, the second radiator 221 may be located at the bottom of the second body 120. Or in other embodiments, the first radiator 211 is located on a side of the first body 110 facing away from the folding axis L0, and the second radiator 221 is located on a side of the second body 120 facing away from the folding axis L0.

In the present embodiment, the first sub-radiator 2111 is illustrated as being away from the foldable axis L0 compared to the second sub-radiator 2112. In other embodiments, the first sub-radiator 2111 is disposed adjacent to the fold axis L0 as compared to the second sub-radiator 2112.

The second sub-radiator 2112 is electrically connected to the first matching circuit M1, and when the first feed source S1 is also electrically connected to the first matching circuit M1, the first feed source S1 can directly excite not only the first sub-radiator 2111 but also the second sub-radiator 2112, and thus, the structure of the first antenna assembly 210 is referred to as a distributed antenna. When the first feed source S1 is electrically connected to the first matching circuit M1 and excites the second sub-radiator 2112, the second sub-radiator 2112 may support the transmission and reception of electromagnetic wave signals in the first frequency band. In other words, when the first feed source S1 directly excites the first sub-radiator 2111 and the first feed source S1 also directly excites the second sub-radiator 2112, the first antenna assembly 210 has a larger bandwidth and better antenna performance when supporting the transmission and reception of the electromagnetic wave signals of the first frequency band. Compared with the narrower bandwidth of the first antenna element 210 in the related art, the first antenna element 210 in the antenna device 20 in the electronic device 1 provided by the embodiment of the application has the technical effects of widening the bandwidth and improving the antenna performance. The case when the first sub-radiator 2111 and the second sub-radiator 2112 support the first frequency band when the foldable body 10 is in the unfolded state will be described later with reference to a simulation diagram.

When the foldable body 10 is in the folded state, the second sub-radiator 2112 is coupled with the second radiator 221 and acts as a parasitic branch of the second radiator 221, and thus, the antenna performance of the second antenna assembly 220 can be improved. Since the second sub-radiator 2112 can enhance the performance of the second antenna assembly 220 when the foldable body 10 is in the folded state, it can also be considered that the second sub-radiator 2112 can enhance the antenna performance (also referred to as the antenna performance in the closed-cover state, or the closed-cover antenna performance) of the second antenna assembly 220 when the foldable body 10 is in the folded state.

Therefore, in the embodiment of the present application, when the second sub-radiator 2112 can be directly excited by the first feed source S1, the antenna performance (for example, the system transceiving efficiency) of the first frequency band supported by the first antenna component 210 can be improved; when the antenna assembly is in the folded state, the second sub-radiator 2112 is coupled to the second radiator 221, so as to act as a parasitic branch of the second radiator 221, so as to improve the antenna performance (such as the system transceiving efficiency) of the second frequency band supported by the second antenna assembly 220. In other words, the second sub-radiator 2112 may improve the antenna performance of the first antenna assembly 210 as well as the antenna performance of the second antenna assembly 220. In the related art, different radiation branches are utilized to improve the antenna performance of different antenna assemblies, so that the occupied space of the antenna assemblies in the electronic equipment 1 in the related art is larger, which is not beneficial to improving the space utilization rate of the electronic equipment 1. Compared with the related art, the embodiment of the application can realize the improvement of the antenna performances of the first antenna assembly 210 and the second antenna assembly 220 by using one radiation branch of the second sub-radiator 2112, thereby saving one radiation branch, and having smaller occupied space, so as to improve the space utilization rate of the electronic device 1.

As can be appreciated, in the foregoing embodiment, when the foldable body 10 is in the unfolded state, the first feed source S1 is electrically connected to the first matching circuit M1, and the first feed source S1 excites the second sub-radiator 2112 to transmit and receive the electromagnetic wave signal of the first frequency band through the first matching circuit M1.

In summary, in the electronic device 1 according to the embodiment of the present application, when the foldable main body 10 is in the unfolded state, the first feed source S1 directly excites the first sub-radiator 2111, and the first feed source S1 also directly excites the second sub-radiator 2112, so that the first feed source S1 can better excite the first sub-radiator 2111 and the second sub-radiator 2112, and the first antenna assembly 210 has a larger bandwidth and better antenna performance such as system radiation efficiency when supporting the transmission and reception of the electromagnetic wave signals of the first frequency band. In addition, the first matching circuit M1 adjusts the phase of the excitation signal of the first frequency band, so that the first frequency band supported by the first sub-radiator 2111 and the second sub-radiator 2112 has a higher resonance efficiency in the band. When the foldable body 10 is in the folded state, the second sub-radiator 2112 is coupled with the second radiator 221 and acts as a parasitic branch of the second radiator 221, and thus, the antenna performance of the second antenna assembly 220 can be improved. In addition, compared with the related art, the embodiment of the application can realize the improvement of the antenna performance of the first antenna assembly 210 and the second antenna assembly 220 by using one radiation branch of the second sub-radiator 2112, thereby saving one radiation branch, and having smaller occupied space of one radiation branch, so as to improve the space utilization rate of the electronic device 1.

Referring to fig. 5 and fig. 6 together, fig. 5 is a schematic view of a part of an electronic device when a foldable main body of an embodiment is in an unfolded state; fig. 6 is a schematic diagram of a variation of the antenna device of fig. 5 when the foldable body is in a folded state. The relationship between the antenna device in fig. 6 and the antenna device in fig. 5 is the same as the relationship between fig. 4 and fig. 3, and the description of the relative positions of the first antenna element 210 and the second antenna element 220 in fig. 4 and fig. 3 is omitted here.

The first antenna assembly 210 further includes a second matching circuit M2. One end of the second matching circuit M2 is electrically connected to the first sub-radiator 2111, the other end of the second matching circuit M2 is electrically connected to the first feed source S1, and the second matching circuit M2 is configured to adjust a resonance frequency point of the first frequency band supported by the first sub-radiator 2111.

In the case that the resonance frequency point of the first frequency band supported by the second sub-radiator 2112 is fixed, the second matching circuit M2 provided in the embodiment of the present application adjusts the resonance frequency point of the first frequency band supported by the first sub-radiator 2111, and can adjust the bandwidth of the first frequency band supported by the first antenna assembly 210, so that the bandwidth of the first frequency band supported by the first antenna assembly 210 is larger, and the performance of the first antenna assembly 210 is improved.

Referring to fig. 7, fig. 7 is a circuit block diagram of an electronic device according to an embodiment of the application. The electronic device 1 further comprises a controller 50. The controller 50 is electrically connected to the first matching circuit M1, and when the foldable body 10 is in the folded state: the controller 50 controls the first antenna assembly 210 to be inactive and the second antenna assembly 220 to be active, and the controller 50 controls the first matching circuit M1 to be disconnected from the first feed source S1.

The controller 50 may be a processor in the electronic device 1, or a functional circuit or chip having a control function in the electronic device 1 other than the processor.

It will be appreciated that the electronic device 1 further comprises a sensor 60, which sensor 60 can detect the state of the foldable body 10. The sensor 60 is electrically connected to the controller 50 to transmit an electrical signal to the controller 50 that detects the state of the first foldable body 10.

When the foldable body 10 is in the folded state, the controller 50 controls the first antenna assembly 210 not to operate, so that the first antenna assembly 210 does not transmit and receive electromagnetic wave signals of the first frequency band any more, and does not transmit and receive electromagnetic wave signals of other frequency bands. The controller 50 controls the second antenna assembly 220 to operate, so that the second antenna assembly 220 receives and transmits electromagnetic wave signals in a second frequency band. Since the first antenna assembly 210 does not operate, the influence of the first antenna assembly 210 on the second antenna assembly 220 receiving and transmitting electromagnetic wave signals in the second frequency band can be avoided. In addition, the controller 50 controls the first matching circuit M1 to be disconnected from the first feed source S1, so that the second sub-radiator 2112 is no longer electrically connected to the first feed source S1, and the second sub-radiator 2112 may act as a parasitic branch of the second radiator 221, which is beneficial to improving the antenna performance of the second antenna assembly 220. Since the second sub-radiator 2112 can enhance the performance of the second antenna assembly 220 when the foldable body 10 is in the folded state, it can also be considered that the second sub-radiator 2112 can enhance the antenna performance (also referred to as the antenna performance in the closed-cover state, or the closed-cover antenna performance) of the second antenna assembly 220 when the foldable body 10 is in the folded state.

In other embodiments, when the foldable main body 10 is in the folded state, the first feed source S1 may also be electrically connected to the first matching circuit M1, and the first feed source S1 directly excites the second sub-radiator 2112 to transmit and receive the electromagnetic wave signal of the first frequency band through the first matching circuit M1. Specifically, the controller 50 may further control the first feed S1 to be electrically connected to the first matching circuit M1 when the foldable body 10 is in the folded state.

Referring to fig. 7, 8, 9 and 10, fig. 8 is a schematic view of a part of the electronic device when the foldable main body is in an unfolded state; fig. 9 is a schematic diagram showing a variation of the antenna device when the foldable body of fig. 8 is in a folded state; fig. 10 is a circuit schematic diagram of the third matching circuit and the switch connected to the third matching circuit in fig. 8. The relationship between the antenna device in fig. 9 and the antenna device in fig. 8 is the same as the relationship between fig. 4 and fig. 3, and the description of the relative positions of the first antenna element 210 and the second antenna element 220 in fig. 4 and fig. 3 is omitted here. The second sub-radiator 2112 has a connection point P1, and the first matching circuit M1 is electrically connected to the connection point P1. The electronic device 1 further comprises a controller 50. The first antenna component 210 further includes a switch 2121 and a third matching circuit M3. The third matching circuit M3 includes a plurality of matching sub-circuits 2122, the switch 2121 is electrically connected to the connection point P1, one end of the matching sub-circuit 2122 is electrically connected to the switch 2121, and the other end is grounded. When the foldable body 10 is in the folded state: the controller 50 controls the first antenna assembly 210 to be inactive and the second antenna assembly 220 to be active, the first matching circuit M1 is electrically connected to the first feed S1, and the controller 50 controls the switch 2121 to be electrically connected to at least one of the plurality of matching sub-circuits 2122.

In the present embodiment, the number of the matching sub-circuits 2122 is 4, and the change-over switch 2121 is exemplified as a single pole four throw switch, and it should be understood that the third matching circuit M3 provided in the implementation of the present application is not limited. In other embodiments, the matching sub-circuit 2122 may be 2, or 3, or 5, or greater than 5, etc. Accordingly, when the number of the matching sub-circuits 2122 is N (N is greater than or equal to 2 and N is a positive integer), it can be appreciated that the switch 2121 is a single pole N throw switch, or the switch 2121 includes N switch sub-switches, each switch sub-switch is electrically connected to one matching sub-circuit 2122 and the connection point P1, and different switch sub-switches are electrically connected to different matching sub-circuits 2122.

When the foldable body 10 is in the folded state, the controller 50 controls the first antenna assembly 210 not to operate, so that the first antenna assembly 210 does not transmit and receive electromagnetic wave signals of the first frequency band any more, and does not transmit and receive electromagnetic wave signals of other frequency bands. The controller 50 controls the second antenna assembly 220 to operate, so that the second antenna assembly 220 receives and transmits electromagnetic wave signals in a second frequency band. Since the first antenna assembly 210 does not operate, the influence of the first antenna assembly 210 on the second antenna assembly 220 receiving and transmitting electromagnetic wave signals in the second frequency band can be avoided. Further, the controller 50 controls the change-over switch 2121 to be electrically connected to at least one of the plurality of matching sub-circuits 2122 such that an equivalent electrical length of the second sub-radiator 2112 matches the second frequency band. In other words, the controller 50 controls the switch 2121 to be electrically connected to at least one of the plurality of matching sub-circuits 2122 such that the equivalent electrical length of the second sub-radiator 2112 supports the transceiving of the electromagnetic wave signal of the second frequency band, and thus, the second sub-radiator 2112 can transceive the electromagnetic wave signal of the second frequency band as a parasitic branch of the second radiator 221. In addition, the third matching circuit M3 is configured to adjust a resonance frequency point of the frequency band supported by the second sub-radiator 2112. Specifically, whether the foldable main body 10 is in a folded state or the foldable main body 10 is in an unfolded state, the third matching circuit M3 is configured to adjust a resonance frequency point of the first frequency band supported by the second sub-radiator 2112 as long as the first feed source S1 is electrically connected to the first matching circuit M1, and the second sub-radiator 2112 is excited to transmit and receive electromagnetic wave signals of the first frequency band; when the second sub-radiator 2112 is used as a parasitic radiator of the second radiator 221, the second radiator 221 receives and transmits electromagnetic wave signals of a second frequency band, and the third matching circuit M3 is configured to adjust a resonance frequency point of the electromagnetic wave signals of the second frequency band received and transmitted by the second sub-radiator 2112.

In another embodiment, when the collapsible body 10 is in a collapsed state: the first antenna assembly 210 operates, the second antenna assembly 220 operates, and the controller 50 controls the first matching circuit M1 to be disconnected from the first feed source S1. Since the first matching circuit M1 is disconnected from the first feed source S1, the first feed source S1 in the first antenna assembly 210 is only electrically connected to the first sub-radiator 2111, and when the first antenna assembly 210 is operated, the first sub-radiator 2111 can be used to transmit and receive electromagnetic wave signals of a first frequency band, and the second sub-radiator 2112 cannot be used to transmit and receive electromagnetic wave signals of a first frequency band, so that the first antenna assembly 210 has a resonance frequency point (i.e., single resonance) when operating in the first frequency band. In addition, the second sub-radiator 2112 acts as a parasitic stub of the second radiator 221, and the generated resonance serves to supplement and improve the performance of the second antenna assembly 220 in a folded state (a covered state).

Further, in another embodiment, when the foldable body 10 is in a folded state: the controller 50 controls the first antenna assembly 210 to be inactive and controls the second antenna assembly 220 to be active. Specifically, when the foldable body 10 is in the folded state: the controller 50 controls the first feed source S1 to disconnect the electrical connection with the second matching circuit M2, and adjusts the switch in the second matching circuit M2 to adjust the matching parameters of the second matching circuit M2, so that the first sub-radiator 2111 serves as a parasitic radiator of the second radiator 221. Further, when the foldable body 10 is in the folded state: the controller 50 also controls the first feed S1 to disconnect the electrical connection with the first matching circuit M1, and the second sub-radiator 2112 also acts as a parasitic radiator of the second radiator 221.

As can be seen, in this embodiment, when the foldable body 10 is in the folded state: the controller 50 controls the first feed source S1 to disconnect from the electrical connection with the second matching circuit M2, the first sub-radiator 2111 is used as a parasitic radiator of the second radiator 221, and the second matching circuit M2 is used for adjusting a resonance frequency point of the second frequency band supported by the first sub-radiator 2111, so that the second antenna assembly 220 has better antenna performance. In other words, in such an embodiment, the first sub-radiator 2111 and the second sub-radiator 2112 both act as parasitic radiators of the second radiator 221, and therefore, the second antenna assembly 220 has better antenna performance. Specifically, the controller 50 may adjust the switch in the second matching circuit M2 to adjust the matching parameter of the second matching circuit M2, thereby adjusting the resonance frequency point of the second frequency band supported by the first sub-radiator 2111.

In addition to the foregoing embodiments, the first antenna assembly 210 operates and the second antenna assembly 220 operates when the foldable body 10 is in the unfolded state, and in other embodiments, the first antenna assembly 210 and the second antenna assembly 220 have other modes of operation when the foldable body 10 is in the unfolded state. For example, the controller 50 may control the operation of the first antenna assembly 210 and the second antenna assembly 220 according to actual needs. When the foldable body 10 is in the unfolded state: the first antenna assembly 210 operates and the second antenna assembly 220 operates; or the first antenna assembly 210 is operational and the second antenna assembly 220 is not operational; or the first antenna assembly 210 is not operating and the second antenna assembly 220 is operating; or the first antenna assembly 210 is not operational and the second antenna assembly 220 is not operational. The application is not limited to the operation of the first antenna assembly 210 and the second antenna assembly 220 when the foldable device is in the unfolded state.

Further, when the foldable body 10 is in the folded state: the first antenna assembly 210 operates and the second antenna assembly 220 operates; or the first antenna assembly 210 is operational and the second antenna assembly 220 is not operational; or the first antenna assembly 210 is not operating and the second antenna assembly 220 is operating; or the first antenna assembly 210 is not operational and the second antenna assembly 220 is not operational. The application is not limited to the operation of the first antenna assembly 210 and the second antenna assembly 220 when the foldable device is in the folded state.

Referring to fig. 11 and 12 together, fig. 11 is a schematic view of a portion of an electronic device with a foldable main body in an unfolded state according to another embodiment; fig. 12 is a schematic diagram showing a variation of the antenna device in the folded state of the foldable body in fig. 11. The first sub-radiator 2111 includes a first end 211a and a second end 211b. The first end 211a is grounded, and the second end 211b is electrically connected to the first feed S1. The second sub-radiator 2112 includes a third end 212a and a fourth end 212b, the third end 212a is spaced from the second end 211b, the third end 212a is electrically connected to the first matching circuit M1, and the fourth end 212b is a free end.

In this embodiment, the first end 211a is a ground end, and the second end 211b is electrically connected to the first feed source S1, so that, in a case where the length of the first sub-radiator 2111 is fixed, a position where the first sub-radiator 2111 receives the excitation signal of the first frequency band (i.e., a position where the second end 211b is electrically connected to the first feed source S1) is relatively far from a position where the ground end of the first sub-radiator 2111, so that the first sub-radiator 2111 can be fully utilized.

The third end 212a is electrically connected to the first matching circuit M1, and when the first matching circuit M1 is electrically connected to the first feed source S1, the first feed source S1 may excite the second sub-radiator 2112 to transmit and receive electromagnetic wave signals of the first frequency band.

Referring to fig. 13 and 14 together, fig. 13 is a schematic view of a portion of an electronic device provided by another embodiment in which a foldable main body is in an unfolded state; fig. 14 is a schematic diagram showing a variation of the antenna device of fig. 13 when the foldable body is in a folded state. The first sub-radiator 2111 includes a first end 211a and a second end 211b. The first end 211a is grounded, and the second end 211b is electrically connected to the first feed S1. The second sub-radiator 2112 includes a third end 212a and a fourth end 212b. The third end 212a is spaced from the second end 211b, and the third end 212a is grounded, and the fourth end 212b has a connection point P1. The first antenna component 210 further includes a switch 2121, a third matching circuit M3, and a fourth matching circuit M4. The third matching circuit M3 includes a plurality of matching sub-circuits 2122, and one end of the matching sub-circuit 2122 is electrically connected to the switch 2121, and the other end is grounded. One end of the fourth matching circuit M4 is electrically connected to the connection point P1, the other end is electrically connected to the switch 2121, and a connection portion between the fourth matching circuit M4 and the switch 2121 is further electrically connected to the first matching circuit M1.

When the foldable body 10 is in a folded state and the first antenna assembly 210 is not in operation, the controller 50 may control the switch 2121 to be electrically connected to at least one of the plurality of sub-matching circuits, so that the equivalent electrical length of the second sub-radiator 2112 matches the second frequency band, thereby adjusting the resonance frequency point of the second frequency band supported by the second sub-radiator 2112. In other words, the controller 50 controls the switch 2121 to be electrically connected to at least one of the plurality of matching sub-circuits 2122 such that the equivalent electrical length of the second sub-radiator 2112 supports the transceiving of the electromagnetic wave signal of the second frequency band, and thus, the second sub-radiator 2112 can transceive the electromagnetic wave signal of the second frequency band as a parasitic branch of the second radiator 221.

The third matching circuit M3 is configured to adjust a resonance frequency point of a frequency band supported by the second sub-radiator 2112. Specifically, the third matching circuit M3 is configured to adjust a resonance frequency point of the first frequency band supported by the second sub-radiator 2112 when the second sub-radiator 2112 is excited to transmit and receive the electromagnetic wave signal of the first frequency band, as long as the first feed source S1 is electrically connected to the first matching circuit M1, regardless of whether the foldable main body 10 is in the folded state or the unfolded state of the foldable main body 10. When the second sub-radiator 2112 is used as a parasitic radiator of the second radiator 221, the second radiator 221 receives and transmits electromagnetic wave signals of a second frequency band, and the third matching circuit M3 is configured to adjust a resonance frequency point of the electromagnetic wave signals of the second frequency band received and transmitted by the second sub-radiator 2112.

The fourth matching circuit M4 is configured to adjust a resonance frequency point of the electromagnetic wave signal supported by the second sub-radiator 2112. Specifically, the fourth matching circuit M4 is configured to adjust a resonance frequency point of the first frequency band supported by the second sub-radiator 2112 when the second sub-radiator 2112 is excited to transmit and receive the electromagnetic wave signal of the first frequency band, as long as the first feed source S1 is electrically connected to the first matching circuit M1, regardless of whether the foldable main body 10 is in the folded state or the unfolded state of the foldable main body 10. When the second sub-radiator 2112 is used as a parasitic radiator of the second radiator 221, the second radiator 221 receives and transmits electromagnetic wave signals of a second frequency band, and the fourth matching circuit M4 is configured to adjust a resonance frequency point of the electromagnetic wave signals of the second frequency band received and transmitted by the second sub-radiator 2112.

Therefore, the third matching circuit M3 and the fourth matching circuit M4 jointly adjust the resonance frequency point of the electromagnetic wave signal supported by the second sub-radiator 2112, so that the adjustment of the resonance frequency point of the electromagnetic wave signal supported by the second sub-radiator 2112 is more flexible and finer.

The structure of the second radiator 221 will be described. Referring to fig. 8 and 9, the second radiator 221 includes a third sub-radiator 2211. The third sub-radiator 2211 includes a first ground 221a and a first coupling 221b. The first ground 221a is grounded, and the first coupling 221b is electrically connected to the second feed S2. The third sub-radiator 2211 is coupled with the second sub-radiator 2112 when the foldable body 10 is in a folded state.

In this embodiment, the second radiator 221 has one radiation branch, i.e., a third sub-radiator 2211. When the foldable body 10 is in the folded state, the first grounding end 221a is disposed adjacent to the first end 211a grounded in the first sub-radiator 2111 as compared to the first coupling end 221 b.

When the foldable body 10 is in the folded state, the third sub-radiator 2211 is closer to the second sub-radiator 2112, and the third sub-radiator 2211 is coupled to the second sub-radiator 2112, so that the second sub-radiator 2112 may act as a parasitic branch of the third sub-radiator 2211. When the second antenna assembly 220 operates, the second sub-radiator 2112 can transmit and receive electromagnetic wave signals in the second frequency band because the second sub-radiator 2112 is used as a parasitic branch of the third sub-radiator 2211.

In this embodiment, the second radiator 221 includes a third sub-radiator 2211, and when the foldable main body 10 is in the folded state, the second sub-radiator 2112 is coupled to the third sub-radiator 2211 and acts as a parasitic branch of the third sub-radiator 2211, so that the antenna performance of the second antenna assembly 220 can be improved.

Referring to fig. 11 and 12, or referring to fig. 13 and 14, the second radiator 221 includes a third sub-radiator 2211 and a fourth sub-radiator 2212. The third sub-radiator 2211 includes a first ground 221a and a first coupling 221b. The first ground 221a is grounded, and the first coupling 221b is electrically connected to the second feed S2. The fourth sub-radiator 2212 includes a second grounding end 222a and a second coupling end 222b. The second grounding end 222a is grounded, the second coupling end 222b and the first coupling end 221b are spaced apart to form a coupling gap, and the fourth sub-radiator 2212 and the third sub-radiator 2211 are coupled through the coupling gap. When the foldable body 10 is in the folded state: the third sub-radiator 2211 is at least partially stacked and coupled with the first sub-radiator 2111, and the fourth sub-radiator 2212 is at least partially stacked and coupled with the second sub-radiator 2112.

The first coupling end 221b is electrically connected to the second feed source S2, and the fourth sub-radiator 2212 is coupled with the third sub-radiator 2211 through the coupling gap, so the fourth sub-radiator 2212 is a coupling branch of the third sub-radiator 2211.

In the present embodiment, the second radiator 221 has two radiating branches, namely, a third sub-radiator 2211 and a fourth sub-radiator 2212. Compared to the second radiator 221 having one radiating branch, the second radiator 221 having two radiating branches, i.e., the third sub-radiator 2211 and the fourth sub-radiator 2212, can make the second radiator 221 have a larger bandwidth and better antenna performance.

When the foldable body 10 is in a folded state, the third sub-radiator 2211 is partially stacked and coupled with the first sub-radiator 2111 support, and the first sub-radiator 2111 serves as a parasitic branch of the third sub-radiator 2211.

When the foldable body 10 is in a folded state, the fourth sub-radiator 2212 is at least partially stacked and coupled with the second sub-radiator 2112, the second sub-radiator 2112 acting as a parasitic stub of the fourth sub-radiator 2212.

It will be appreciated that since the fourth sub-radiator 2212 is coupled to the third sub-radiator 2211, the first sub-radiator 2111 is coupled to the third sub-radiator 2211 when the foldable body 10 is in the folded state, and thus the first sub-radiator 2111 is also coupled to the fourth sub-radiator 2212, in other words, the first sub-radiator 2111 also acts as a parasitic branch of the fourth sub-radiator 2212.

It will be appreciated that since the fourth sub-radiator 2212 is coupled to the third sub-radiator 2211, the second sub-radiator 2112 is coupled to the fourth sub-radiator 2212 when the foldable body 10 is in the folded state, and thus the second sub-radiator 2112 is also coupled to the third sub-radiator 2211, in other words, the second sub-radiator 2112 also acts as a parasitic branch of the third sub-radiator 2211.

When the first antenna assembly 210 is not in operation, the second sub-radiator 2112 acts as a parasitic branch of the second radiator 221, and the first sub-radiator 2111 also acts as a parasitic branch of the second radiator 221, so that the antenna performance of the second antenna assembly 220 can be improved.

Since the first and second sub-radiators 2111 and 2112 can improve the performance of the second antenna assembly 220 when the foldable body 10 is in the folded state, the first and second sub-radiators 2111 and 2112 can also be regarded as improving the antenna performance (also referred to as the antenna performance in the closed-cover state or the closed-cover antenna performance) of the second antenna assembly 220 when the foldable body 10 is in the folded state.

Referring to fig. 15 and 16, fig. 15 is a schematic view of a part of the structure of the electronic device when the foldable main body is in the unfolded state; fig. 16 is a schematic diagram showing a variation of the antenna device in the folded state of the foldable body in fig. 15. The antenna device 20 further comprises a third antenna assembly 230. The third antenna assembly 230 is disposed on the second body 120, and the third antenna assembly 230 includes a third radiator 231 and a third feed source S3. The third radiator 231 is disposed on a side of the fourth sub-radiator 2212 facing away from the third sub-radiator 2211, and the third radiator 231 and the fourth sub-radiator 2212 are disposed at intervals. The third feed source S3 is electrically connected to the third radiator 231, and the third feed source S3 is configured to generate an excitation signal in a third frequency band. When the foldable body 10 is in the folded state: a portion of the second sub-radiator 2112 is laminated with the third radiator 231, and a portion of the second sub-radiator 2112 and the fourth sub-radiator 2212 are laminated, the second sub-radiator 2112 functioning as a parasitic branch of the second antenna assembly 220 or the third antenna assembly 230.

When the foldable body 10 is in a folded state, a part of the second sub-radiator 2112 is laminated with the third radiator 231 and a part of the second sub-radiator 2112 and the fourth sub-radiator 2212 are laminated, and thus, the second sub-radiator 2112 may be coupled with the third radiator 231 and the second sub-radiator 2112 may be coupled with the fourth sub-radiator 2212.

The second sub-radiator 2112 acts as a parasitic stub for the second antenna assembly 220 or the third antenna assembly 230 when the foldable body 10 is in the folded state. In other words, when the foldable body 10 is in the folded state, the second sub-radiator 2112 can only act as a parasitic branch of one of the second antenna assembly 220 and the third antenna assembly 230, and cannot simultaneously act as a parasitic branch of the second antenna assembly 220 and the third antenna assembly 230.

When the foldable body 10 is in the folded state, the second sub-radiator 2112 acts as a parasitic stub of the second antenna assembly 220, and thus, the antenna performance of the second antenna assembly 220 can be improved. Since the second sub-radiator 2112 can enhance the performance of the second antenna assembly 220 when the foldable body 10 is in the folded state, it can also be considered that the second sub-radiator 2112 can enhance the antenna performance (also referred to as the antenna performance in the closed-cover state, or the closed-cover antenna performance) of the second antenna assembly 220 when the foldable body 10 is in the folded state. When the foldable body 10 is in the folded state, the second sub-radiator 2112 acts as a parasitic stub of the third antenna assembly 230, and thus, the antenna performance of the third antenna assembly 230 can be improved. Since the second sub-radiator 2112 can enhance the performance of the third antenna assembly 230 when the foldable body 10 is in the folded state, it can also be considered that the second sub-radiator 2112 can enhance the antenna performance (also referred to as the antenna performance in the closed-cover state, or the closed-cover antenna performance) of the third antenna assembly 230 when the foldable body 10 is in the folded state.

The specific structure of the third radiator 231 will be described in detail. The third radiator 231 includes a fifth sub-radiator 2311 and a sixth sub-radiator 2312. The fifth sub-radiator 2311 has a fifth end 231a and a sixth end 231b, the fifth end 231a is grounded, and the sixth end 231b is electrically connected to the third feed S3. The sixth sub-radiator 2312 has a seventh end 232a and an eighth end 232b, the seventh end 232a being spaced apart from and coupled to the sixth end 231b, the eighth end 232b being grounded. When the foldable body 10 is in a folded state, a part of the second sub-radiator 2112 is laminated and coupled with the fifth sub-radiator 2311.

The sixth end 231b is electrically connected to the third feed source S3, and the seventh end 232a is spaced apart from and coupled to the sixth end 231b, so that the sixth sub-radiator 2312 serves as a coupling stub of the fifth sub-radiator 2311.

In the present embodiment, the third radiator 231 has two radiation branches, namely, a fifth sub-radiator 2311 and a sixth sub-radiator 2312. Compared to the third radiator 231 having one radiating branch, the third radiator 231 having two radiating branches, namely the fifth sub-radiator 2311 and the sixth sub-radiator 2312, can make the third radiator 231 have a larger bandwidth and better antenna performance. In other embodiments, the third radiator 231 includes the fifth sub-radiator 2311, and does not include the sixth sub-radiator 2312. When the third radiator 231 includes the fifth sub-radiator 2311, the fifth sub-radiator 2311 has a fifth end 231a and a sixth end 231b, the fifth end 231a is grounded, and the sixth end 231b is electrically connected to the third feed S3.

Referring further to fig. 17, fig. 17 is a schematic diagram of a first antenna assembly according to an embodiment. The first radiator 211 includes one or more second sub-radiators 2112. In the schematic diagram of the present embodiment, the number of the second sub-radiators 2112 is illustrated as 2, and it is understood that the limitation of the first antenna assembly 210 provided in the embodiment of the present application should not be constructed. When the first radiator 211 includes a plurality of second sub-radiators 2112, the plurality of second sub-radiators 2112 are spaced. When the first radiator 211 includes a plurality of second sub-radiators 2112, the first antenna assembly 210 includes a plurality of first matching circuits M1, the second sub-radiators 2112 are electrically connected to the first matching circuits M1 and different second sub-radiators 2112 are electrically connected to different first matching circuits M1. The first feed S1 is electrically connected to one or more first matching circuits M1 when the foldable body 10 is in the unfolded state. When the foldable body 10 is in a folded state, one or more of the plurality of second sub-radiators 2112 are coupled with the second radiator 221 to act as parasitic branches of the second radiator 221. In this embodiment, the first antenna assembly 210 is configured and incorporated into the second antenna assembly 220 provided in any of the previous embodiments.

When the foldable body 10 is in the unfolded state, the first feed S1 is electrically connected to one or more first matching circuits M1, and the first feed S1 branches excite one or more second sub-radiators 2112 electrically connected to the one or more first matching circuits M1, since the first matching circuits M1 are electrically connected to the second sub-radiators 2112. Therefore, the first antenna assembly 210 has a larger bandwidth and better antenna performance when supporting the transmission and reception of the electromagnetic wave signals in the first frequency band. When the foldable body 10 is in a folded state, one or more of the plurality of second sub-radiators 2112 are coupled with the second radiator 221 to act as parasitic branches of the second radiator 221, and thus, the antenna performance of the second antenna assembly 220 can be improved.

In combination with the above embodiments, for example, the first frequency band is a low frequency band, and the second frequency band may be a medium frequency band or a high frequency band. For example, the first frequency band is a low-frequency N28 frequency band, and the second frequency band operates at 2GHz. Of course, the present application does not limit the first frequency band and the second frequency band, as long as the first frequency band and the second frequency band are different. Correspondingly, the third frequency band is not limited by the application, so long as the first frequency band, the second frequency band and the third frequency band are different.

The performance of the antenna device 20 in the electronic apparatus 1 according to the embodiment of the present application will be described with reference to the simulation. Referring to fig. 18, fig. 18 is a schematic diagram of an S parameter of a first antenna element and an S parameter of a single branch antenna in the related art. In the present schematic diagram, the horizontal axis is frequency, the unit is GHz, the vertical axis is S parameter (S PARAMETERS), the unit is dB, the curve ① is an S parameter curve of the first antenna component 210 according to the present application, and the curve ② is an S parameter curve of a related art in which a single branch (single) supports the first frequency band. It can be seen that the first antenna component 210 in the antenna device 20 provided in the embodiment of the present application has two resonant frequency points, which are respectively marked as point 1 and point 2 in the curve ①, wherein the coordinate values of point 1 are (0.7345, -5.9436), the coordinate values of point 2 are (0.81936, -20.037), and only one resonant frequency point is in the curve ②. Further, as can be seen from curve ① and curve ②, the bandwidth is larger in curve ①. In summary, the antenna performance such as the bandwidth of the first antenna assembly 210 provided in the embodiment of the present application is better than that of the single branch antenna in the related art. Since the first antenna assembly 210 is a distributed antenna, it can be seen that the present application designs the first antenna assembly 210 to be a distributed antenna so that the performance of the antenna is better than that of the single branch antenna in the related art.

Referring to fig. 19, fig. 19 is a schematic diagram showing the system radiation efficiency and the system radiation efficiency of the first antenna assembly and the system radiation efficiency and the system total efficiency of the single branch antenna in the related art. In the present schematic diagram, the horizontal axis is frequency, the unit is GHz, the vertical axis is efficiency, the unit is dB, the curve ① is a System radiation efficiency (System rad. Efficiency) curve of the first antenna assembly 210 of the present application, the curve ② is a System radiation efficiency curve of a single-branch antenna in the related art, the curve ③ is a System total efficiency (System tot. Efficiency) curve of the first antenna assembly 210 of the present application, and the curve ④ is a System total efficiency curve of a single-branch antenna in the related art. The simulation is performed in this simulation diagram by using the first antenna assembly 210 and the single branch antenna in the related art to work at Low frequency (LB). As can be seen from the curves ① and ② in the present simulation, the system radiation efficiency of the first antenna assembly 210 provided by the embodiment of the present application is better than that of the single branch antenna in the related art. As can be seen from the curves ③ and ④ in the present simulation, the overall system efficiency of the first antenna assembly 210 provided by the embodiments of the present application is superior to that of the single-branch antenna of the related art. Further, as can be seen from curve ①, curve ① has two pits, labeled a ₁ and a ₂, respectively. The pits a ₁ and a ₂ represent a lower system radiation efficiency in the first antenna element 210, while the pits a ₁ and a ₂ are outside the bandwidth of the first frequency band supported by the first antenna element 210. In other words, the first frequency band has a better system radiation efficiency within the bandwidth range of the first frequency band.

In an embodiment, the first matching circuit M1 is 20nH, the first frequency band is a low-frequency N28 frequency band, and the second frequency band is operated at 2GHz, so that a pit (also called a pit, which indicates that the resonance efficiency is lower) of the resonance efficiency of the first antenna assembly 210 is located outside the bandwidth of the first frequency band supported by the first antenna assembly 210.

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

Claims

1. An electronic device, the electronic device comprising:

2. The electronic device of claim 1, wherein the first antenna assembly further comprises:

One end of the second matching circuit is electrically connected to the first sub-radiator, the other end of the second matching circuit is electrically connected to the first feed source, and the second matching circuit is used for adjusting the resonance frequency point of the first frequency band supported by the first sub-radiator.

3. The electronic device of claim 2, wherein the electronic device further comprises:

The controller is electrically connected with the first matching circuit, and when the foldable main body is in a folded state: the controller controls the first antenna component to be not operated and controls the second antenna component to be operated, and the controller controls the first matching circuit to be disconnected with the first feed source.

4. The electronic device of claim 3, wherein when the foldable body is in a folded state: the controller also controls the first feed source to be disconnected from electrical connection with the second matching circuit, the first sub-radiator is used as a parasitic branch of the second radiator, and the second matching circuit is used for adjusting a resonance frequency point of a second frequency band supported by the first sub-radiator.

5. The electronic device of claim 2, wherein the second sub-radiator has a connection point to which the first matching circuit is electrically connected, the electronic device further comprising a controller;

The first antenna assembly further comprises a switch and a third matching circuit, the third matching circuit comprises a plurality of matching sub-circuits, the switch is electrically connected to the connection point, one end of the matching sub-circuit is electrically connected to the switch, and the other end of the matching sub-circuit is grounded;

When the foldable body is in a folded state: the controller controls the first antenna assembly to be inactive and the second antenna assembly to be active, the first matching circuit is electrically connected with the first feed source, and the controller controls the change-over switch to be electrically connected to at least one of the plurality of matching sub-circuits.

6. The electronic device of claim 1, wherein the electronic device further comprises:

The controller is electrically connected with the first matching circuit, and when the foldable main body is in a folded state: the controller controls the first feed source to be electrically connected to a first matching circuit.

7. The electronic device of claim 1, wherein the first sub-radiator comprises a first end and a second end, the first end being grounded, the second end being electrically connected to the first feed;

The second sub-radiator comprises a third end and a fourth end, the third end is arranged between the second end and the second end, the third end is electrically connected with the first matching circuit, and the fourth end is a free end.

8. The electronic device of claim 1, wherein,

The first sub-radiator comprises a first end and a second end, the first end is grounded, and the second end is electrically connected to the first feed source;

the second sub-radiator comprises a third end and a fourth end, the third end is arranged between the second end and the second end, the third end is grounded, and the fourth end is provided with a connecting point;

the first antenna assembly further comprises:

A change-over switch;

the third matching circuit comprises a plurality of matching sub-circuits, one end of each matching sub-circuit is electrically connected to the corresponding change-over switch, and the other end of each matching sub-circuit is grounded; and

And one end of the fourth matching circuit is electrically connected to the connection point, the other end of the fourth matching circuit is electrically connected to the change-over switch, and the connection part of the fourth matching circuit and the change-over switch is also electrically connected with the first matching circuit.

9. The electronic device of any of claims 1-6, wherein the second radiator comprises:

the third sub-radiator comprises a first grounding end and a first coupling end, the first grounding end is grounded, and the first coupling end is electrically connected to the second feed source;

the third sub-radiator is coupled with the second sub-radiator when the foldable body is in a folded state.

10. The electronic device of any of claims 1-6, wherein the second radiator comprises:

The third sub-radiator comprises a first grounding end and a first coupling end, the first grounding end is grounded, and the first coupling end is electrically connected to the second feed source; and

The fourth sub-radiator comprises a second grounding end and a second coupling end, the second grounding end is grounded, the second coupling end and the first coupling end are arranged at intervals to form a coupling gap, and the fourth sub-radiator and the third sub-radiator are coupled through the coupling gap;

When the foldable body is in a folded state: the third sub-radiator is at least partially stacked and coupled with the first sub-radiator, and the fourth sub-radiator is at least partially stacked and coupled with the second sub-radiator.

11. The electronic device of claim 10, wherein the antenna arrangement further comprises:

The third antenna assembly is arranged on the second main body and comprises a third radiator and a third feed source, the third radiator is arranged on one side, away from the third radiator, of the fourth sub-radiator, the third radiator and the fourth sub-radiator are arranged at intervals, the third feed source is electrically connected to the third radiator, and the third feed source is used for generating excitation signals of a third frequency band;

When the foldable body is in a folded state: and part of the second sub-radiating branches are laminated with the third radiator, part of the second sub-radiating branches and the fourth sub-radiator are laminated, and the second sub-radiating branches are used as parasitic branches of the second antenna component or the third antenna component.

12. The electronic device of claim 11, wherein the third radiator comprises:

A fifth sub-radiator having a fifth end and a sixth end, the fifth end being grounded, the sixth end being electrically connected to the third feed; and

A sixth sub-radiator having a seventh end and an eighth end, the seventh end being disposed and coupled between the sixth end and the end, the eighth end being grounded;

When the foldable body is in a folded state, a portion of the second sub-radiating branches are stacked and coupled with the fifth sub-radiator.

13. The electronic device of claim 1, wherein the first radiator comprises one or more second sub-radiators, the plurality of second sub-radiators being spaced apart when the first radiator comprises a plurality of second sub-radiators;

When the first radiator includes a plurality of second sub-radiators, the first antenna assembly includes a plurality of first matching circuits, the second sub-radiators are electrically connected to the first matching circuits and different second sub-radiators are electrically connected to different first matching circuits;

The first feed is electrically connected to one or more first matching circuits when the foldable body is in an unfolded state; one or more of the plurality of second sub-radiators are coupled with the second radiator as parasitic branches of the second radiator when the foldable body is in a folded state.

14. The electronic device of claim 1, wherein the first matching circuit comprises a capacitance, or an inductance, or a series of a capacitance and an inductance, or a parallel of a capacitance and an inductance.

15. The electronic device of claim 1, wherein the first matching circuit supports the first frequency band when the foldable body is in an unfolded state or the foldable body is in a folded state according to a preset matching parameter, and has a first resonant frequency point and a second resonant frequency point in the first frequency band, wherein the first resonant frequency point and the second resonant frequency point are different.