CN117996397A

CN117996397A - Antenna device, electronic device, and electronic device assembly

Info

Publication number: CN117996397A
Application number: CN202410080932.5A
Authority: CN
Inventors: 蔡晓涛; 曲增朝; 李元鹏; 梁铁柱
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2021-04-08
Filing date: 2021-04-08
Publication date: 2024-05-07
Also published as: CN113224508A

Abstract

The embodiment of the application provides an antenna device, electronic equipment and an electronic equipment assembly.

Description

Antenna device, electronic device, and electronic device assembly

The application is that the application number filed to China patent office is 202110378226.5, the application date is 2021, 04 and 08,

The invention is a divisional application of an invention patent application named as an antenna device, an electronic device and an electronic device assembly.

Technical Field

The embodiment of the application relates to the technical field of terminals, in particular to an antenna device, electronic equipment and an electronic equipment assembly.

Background

With the development of information technology, wireless performance of terminal products has been paid more attention, for example, many national authentications or operator admission have put clear and high demands on wireless performance of terminal products such as mobile phones. The wireless performance level of the terminal product in the actual use situation of the consumer is directly related to the actual experience of the user, and the common use situations include a head-hand model (besides HEAD AND HAND, BHH) of the mobile phone product, a head model (besides head, BH), a hand model (hand, H) and other various situations, which are also common test situations when the country is authenticated or the operator is in the standard. Since the parts of the human body such as the head and the hand belong to the dielectric, when the parts are close to the antenna, the dielectric affects the performance of the antenna, and the performance of the antenna of the product is deteriorated to a certain extent.

Taking an electronic device as an example of a mobile phone, in the prior art, when an antenna is disposed in the mobile phone, the antenna is mainly disposed on a rear shell or a middle frame of the mobile phone, for example, on an electronic device with a metal frame and a glass rear shell ID, and the traditional design scheme of the antenna is generally to design the metal frame into a multi-segment antenna. However, when the human body parts such as the head, the hand and the like are close to the antenna, the antenna performance of the mobile phone is reduced and deteriorated to a certain extent, so that the antenna performance is deteriorated. Therefore, how to reduce the influence of the human body part on the antenna performance is a serious problem faced by the current antenna field.

Disclosure of Invention

The embodiment of the application provides an antenna device, electronic equipment and an electronic equipment assembly, which can reduce the adverse effect of human body parts on antenna performance, thereby improving the actual experience of a user.

An embodiment of the present application provides an antenna apparatus, which is applied to an electronic device, where the electronic device includes a display screen, a rear case, and a middle frame located between the display screen and the rear case, and the antenna apparatus includes: at least one radiating element and at least one parasitic stub for changing a radiation pattern characteristic of the radiating element; the parasitic branch is positioned on one side of the radiating unit facing the display screen; or the parasitic branch is positioned on the side of the radiating element facing the rear shell.

According to the antenna device provided by the embodiment of the application, at least one parasitic branch is arranged on one side of the radiating unit, which faces the display screen, or one side of the radiating unit, which faces the rear shell, and is used for changing the radiation pattern characteristics of the radiating unit, so that the radiation electromagnetic wave of the radiating unit faces the display screen or the rear shell, and when a human hand or a head approaches the rear shell or the display screen of the electronic equipment, the adverse effect of a human body part on the antenna performance is reduced, and the actual experience of a user is improved.

In one possible implementation, the parasitic stub includes: at least one lead to a parasitic branch; the at least one guiding parasitic branch is positioned on one side of the radiating unit facing the display screen, and the guiding parasitic branch is used for guiding the radiating electromagnetic wave of the radiating unit to the direction facing the display screen;

Or the parasitic dendrite includes: at least one reflecting parasitic branch located at a side of the radiating unit facing the rear case, and reflecting the radiated electromagnetic wave of the radiating unit to a direction facing the display screen;

Or the parasitic dendrite includes: at least one directing parasitic branch and at least one reflecting parasitic branch; the at least one guiding parasitic branch is positioned on one side of the radiating unit facing the display screen, and the guiding parasitic branch is used for guiding the radiating electromagnetic wave of the radiating unit to the direction facing the display screen; the at least one reflection parasitic branch is positioned on one side of the radiation unit, which faces the rear shell, and the reflection parasitic branch is used for reflecting the radiation electromagnetic wave of the radiation unit to the direction facing the display screen.

Through set up at least one at the radiating element towards the parasitic branch of one side of display screen, can make radiating element's radiation electromagnetic wave towards the display screen, through set up at least one reflection parasitic branch in radiating element towards one side of backshell, can make radiating element's radiation electromagnetic wave deviate from the backshell (i.e. towards the display screen) to this avoids the staff to be close to when electronic equipment's backshell, causes harmful effects to electronic equipment's antenna performance. Through setting up at least one and guiding parasitic branch in the side of radiating element towards the display screen to set up at least one reflection parasitic branch in the side of radiating element towards the backshell, can make radiating electromagnetic wave of radiating element towards the display screen further, when avoiding the staff to be close to electronic equipment's backshell with this to a greater extent, cause harmful effects to electronic equipment's antenna performance.

In one possible implementation, the at least one radiating element comprises: a bottom radiating unit; the bottom radiation unit is provided with towards the side of display screen the parasitic branch of guiding, perhaps the bottom radiation unit is provided with towards the side of backshell the parasitic branch of reflection, perhaps the bottom radiation unit is provided with towards the side of display screen the parasitic branch of guiding, just the bottom radiation unit is provided with towards the side of backshell the parasitic branch of reflection.

Because the staff is the main influencing factor when holding electronic equipment, upper palm and lower palm are the biggest, and the influence of the bottom radiating element that lies in electronic equipment bottom, if can eliminate or weaken the influence of these two parts hand mould to the bottom radiating element then can obviously promote the antenna efficiency under the hand mould scene, and through above-mentioned setting, can make the directional pattern of antenna towards the display screen direction as far as possible for the directional pattern of antenna towards the backshell direction is weaker, can realize like this reducing the hand mould and fall the width of cloth, promote the effect of antenna performance especially the antenna performance under the user's in-service use scene.

In one possible implementation, the directing parasitic stub is located on a side of the display screen facing the middle frame, and the directing parasitic stub is located within a projection area of the bottom radiating element on the display screen.

In one possible implementation, the bottom radiating element is a metal radiator formed by breaking two breaks in a bottom metal frame of the electronic device.

In one possible implementation, the parasitic stub includes: at least one lead to a parasitic branch; the at least one guiding parasitic branch is positioned on one side of the radiating unit facing the rear shell, and the guiding parasitic branch is used for guiding the radiating electromagnetic wave of the radiating unit to the direction facing the rear shell;

Or the parasitic dendrite includes: at least one reflecting parasitic branch located at a side of the radiating unit facing the display screen, the reflecting parasitic branch being for reflecting the radiated electromagnetic wave of the radiating unit to a direction facing the rear case;

Or the parasitic dendrite includes: at least one directing parasitic branch and at least one reflecting parasitic branch; the at least one guiding parasitic branch is positioned on one side of the radiating unit facing the rear shell, and the guiding parasitic branch is used for guiding the radiating electromagnetic wave of the radiating unit to the direction facing the rear shell; the at least one reflection parasitic branch is positioned on one side of the radiation unit facing the display screen, and the reflection parasitic branch is used for reflecting the radiation electromagnetic wave of the radiation unit to the direction facing the rear shell.

Through set up at least one and draw to parasitic branch in the one side of radiation unit towards the backshell, can make the radiation electromagnetic wave of radiation unit towards the backshell, through set up at least one reflection parasitic branch in the one side of radiation unit towards the display screen, can make the radiation electromagnetic wave of radiation unit deviate from the display screen (i.e. towards the backshell) to this avoids human head to be close to when electronic equipment's backshell, causes the harmful effects to electronic equipment's antenna performance. Through setting up at least one and guiding parasitic branch in the side of radiation unit towards the backshell to set up at least one reflection parasitic branch in the side of radiation unit towards the display screen, can make the radiation electromagnetic wave of radiation unit towards the backshell further, when avoiding human head to be close to electronic equipment's backshell with this to a greater extent, cause harmful effects to electronic equipment's antenna performance.

In one possible implementation, the at least one radiating element comprises: a top radiating element; the side, facing the display screen, of the top radiation unit is provided with the reflection parasitic branches; or the side of the top radiation unit facing the rear shell is provided with the guiding parasitic branch; or the side of the top radiation unit facing the display screen is provided with the reflection parasitic branch, and the side of the top radiation unit facing the rear shell is provided with the guiding parasitic branch.

Because when human head is close to electronic equipment, the influence of the top radiation unit on the top of the electronic equipment is the biggest, if the influence on the top radiation unit can be eliminated or weakened, the antenna efficiency in the head model scene can be obviously improved, and through the arrangement, the direction diagram of the antenna can be enabled to face the rear shell direction as much as possible, the direction diagram of the antenna facing the display screen direction is weaker, so that the effects of reducing the head model amplitude reduction and improving the antenna performance, especially the antenna performance under the actual use scene of a user can be realized.

In one possible implementation, the top radiating element is a metal radiator formed by breaking two breaks of a top metal frame of the electronic device.

In one possible implementation, the distance between the parasitic stub and the radiating element is less than 1/4 wavelength corresponding to the resonant frequency of the radiating element.

In one possible implementation, the length of the director parasitic stub is less than 1/2 wavelength of the resonant frequency of the radiating element.

In one possible implementation, the length of the reflective parasitic stub is greater than 1/2 wavelength corresponding to the resonant frequency of the radiating element.

The second aspect of the embodiment of the present application further provides an electronic device, where the electronic device at least includes: display screen, backshell and be located the display screen with center between the backshell still includes: an antenna device as described in any one of the above; the middle frame is a metal middle frame and at least comprises a metal frame, and the metal frame forms at least one metal radiator in the antenna device; the metal radiator serves as the radiating element.

According to the electronic equipment provided by the embodiment of the application, at least one parasitic branch is arranged between the radiating unit and the display screen or between the radiating unit and the rear shell, so that the radiating electromagnetic wave of the radiating unit is directed to the display screen or the rear shell, and when a human hand or a head is close to the rear shell or the display screen of the electronic equipment, the adverse effect of a human body part on the antenna performance is reduced, and the actual experience of a user is improved.

A third aspect of an embodiment of the present application further provides an electronic device assembly, including: electronic equipment and a protective sleeve positioned outside the electronic equipment; the electronic device includes at least: the antenna comprises a display screen, a rear shell, an antenna device and a middle frame, wherein the middle frame is positioned between the display screen and the rear shell; the antenna device includes: at least one radiating element and at least one parasitic stub for changing a radiation pattern characteristic of the radiating element; the parasitic dendrites are located on the protective sleeve.

According to the electronic equipment assembly provided by the embodiment of the application, the parasitic branches for changing the radiation pattern characteristics of the radiation unit are arranged on the protective cover, so that the radiation electromagnetic wave of the radiation unit can be directed to the display screen or the rear shell, and when a human hand or a head is close to the rear shell or the display screen of the electronic equipment, the adverse effect of a human body part on the antenna performance is reduced, and the actual experience of a user is improved.

In one possible implementation, the protective sleeve includes at least: a main body portion and a wrapping portion connected to the main body portion; the main body part is attached to the rear shell, the wrapping part is arranged around at least part of the metal frame of the electronic equipment, and the wrapping part covers the joint of the metal frame and the display screen and the joint of the metal frame and the rear shell; the parasitic branch is arranged on one side of the wrapping part, which is close to the rear shell; or the parasitic branches are arranged on one side of the wrapping part, which is close to the display screen; or the parasitic branches are arranged on one side of the wrapping part close to the rear shell and one side of the wrapping part close to the display screen.

In one possible implementation, the parasitic stub includes: at least one lead to a parasitic branch; the at least one guiding parasitic branch is positioned on one side of the wrapping part close to the display screen, and the guiding parasitic branch is used for guiding the radiation electromagnetic wave of the radiation unit to the direction facing the display screen;

Or the parasitic dendrite includes: at least one reflection parasitic branch located on a side of the wrapping portion near the rear case, the reflection parasitic branch being for reflecting the radiation electromagnetic wave of the radiation unit to a direction toward the display screen;

The parasitic dendrite includes: at least one directing parasitic branch and at least one reflecting parasitic branch; the at least one guiding parasitic branch is positioned on one side of the wrapping part close to the display screen, and the guiding parasitic branch is used for guiding the radiation electromagnetic wave of the radiation unit to the direction facing the display screen; the at least one reflection parasitic branch is positioned on one side of the wrapping part close to the rear shell, and the reflection parasitic branch is used for reflecting the radiation electromagnetic wave of the radiation unit to the direction facing the display screen.

Through set up at least one and guide parasitic branch on the one side of parcel towards the display screen, can make radiating element's radiation electromagnetic wave towards the display screen, through set up at least one reflection parasitic branch on the one side of parcel towards the backshell, can make radiating element's radiation electromagnetic wave deviate from the backshell (i.e. towards the display screen) to this avoids the staff to be close to when electronic equipment's backshell, causes harmful effects to electronic equipment's antenna performance. Through set up at least one and guide parasitic branch on the one side of parcel towards the display screen to set up at least one reflection parasitic branch on the one side of parcel towards the backshell, can make the radiation electromagnetic wave of radiating element towards the display screen further, when avoiding the staff to be close to electronic equipment's backshell with this to a greater extent, cause harmful effects to electronic equipment's antenna performance.

In one possible implementation, the parasitic stub includes: at least one lead to a parasitic branch; the at least one guiding parasitic branch is positioned on one side of the wrapping part close to the rear shell, and the guiding parasitic branch is used for guiding the radiation electromagnetic wave of the radiation unit to the direction towards the rear shell;

Or the parasitic dendrite includes: at least one reflecting parasitic stub located on a side of the wrapping portion near the display screen, the reflecting parasitic stub being for reflecting the radiant electromagnetic wave of the radiating unit to a direction toward the rear case;

The parasitic dendrite includes: at least one directing parasitic branch and at least one reflecting parasitic branch; the at least one guiding parasitic branch is positioned on one side of the wrapping part close to the rear shell, and the guiding parasitic branch is used for guiding the radiation electromagnetic wave of the radiation unit to the direction towards the rear shell; the at least one reflection parasitic branch is positioned on one side of the wrapping part close to the display screen, and the reflection parasitic branch is used for reflecting the radiation electromagnetic wave of the radiation unit to the direction facing the rear shell.

Through set up at least one and guide parasitic branch on the one side of parcel portion towards the backshell, can make radiating element's radiation electromagnetic wave towards the backshell, through set up at least one reflection parasitic branch on the one side of parcel portion towards the display screen, can make radiating element's radiation electromagnetic wave deviate from the display screen (i.e. towards the backshell) to this avoids human head to be close to when electronic equipment's backshell, causes the harmful effects to electronic equipment's antenna performance. Through set up at least one and guide parasitic branch on the one side of parcel portion towards the backshell to set up at least one reflection parasitic branch on the one side of parcel portion towards the display screen, can make the radiation electromagnetic wave of radiating element towards the backshell further, when avoiding human head to be close to the backshell of electronic equipment with this to a greater extent, cause harmful effects to electronic equipment's antenna performance.

In one possible implementation manner, the middle frame is a metal middle frame, and the metal middle frame at least comprises a metal frame, and the metal frame forms at least one metal radiator in the antenna device; and the metal radiator serves as the radiating element.

Drawings

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

Fig. 2 is a schematic diagram of a split structure of an electronic device according to an embodiment of the present application;

Fig. 3 is a schematic structural diagram of a metal frame of an electronic device according to an embodiment of the present application;

FIG. 4 is a graph of radiation performance of an antenna device in free space in an electronic device according to the prior art;

FIG. 5 is a simulated scene diagram of an electronic device according to an embodiment of the present application with an upper palm removed in a hand-held scene;

FIG. 6 is a simulated scene diagram of an electronic device according to an embodiment of the present application with a lower palm removed in a hand-held scene;

FIG. 7 is a simulated scene diagram of an electronic device according to an embodiment of the application with the right palm removed in a hand-held scene;

FIG. 8 is a simulated scene diagram of an electronic device according to an embodiment of the application with a left palm removed in a hand-held scene;

Fig. 9 is a diagram showing a comparison of simulation efficiency of an antenna device of an electronic device according to an embodiment of the present application after removing palms in different areas in a hand-held scenario;

fig. 10 is a schematic structural diagram of an antenna device in an electronic apparatus according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of an antenna device in an electronic apparatus according to an embodiment of the present application;

FIG. 12 is a schematic view of the cross-sectional structure A-A' of FIG. 11;

FIG. 13 is a graph showing radiation performance versus reflected parasitic branches and directed parasitic branches in an antenna assembly of an electronic device according to an embodiment of the present application;

Fig. 14 is a schematic structural diagram of an antenna device in an electronic apparatus according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of an antenna device in an electronic apparatus according to an embodiment of the present application;

Fig. 16 is a schematic structural diagram of an antenna device in an electronic apparatus according to an embodiment of the present application;

fig. 17 is a graph showing radiation performance of an antenna device in an electronic device according to an embodiment of the present application;

fig. 18 is a radiation pattern of an antenna device at 2.25GHz in free space for an electronic device according to an embodiment of the present application;

FIG. 19 is a radiation pattern of the antenna device at 2.25GHz in a use scenario of the electronic device in a left-hand grip near the left ear according to an embodiment of the present application;

FIG. 20 is a radiation pattern of an antenna device at 2.52GHz in free space for an electronic device according to an embodiment of the present application;

FIG. 21 is a radiation pattern at 2.52GHz of an antenna assembly for an electronic device according to an embodiment of the present application in a use scenario in which the electronic device is held in a right hand;

FIG. 22 is a graph showing the radiation performance of an antenna device for an electronic device according to an embodiment of the present application in free space, in a use scenario where a left hand holds near the left ear, and in a use scenario where a right hand holds near the right ear;

FIG. 23 is a graph showing radiation performance of an antenna device in free space, in a left-hand-held use scenario, and in a left-hand-held use scenario near the left ear for an electronic device according to an embodiment of the present application;

FIG. 24 is a schematic diagram of an electronic device assembly according to an embodiment of the present application;

FIG. 25 is a schematic view of the cross-sectional structure B-B' of FIG. 24.

Reference numerals illustrate:

100-antenna device; 10-radiating elements; a, b, c, d, e, f, g, h-break;

1011-top radiating element; 1012-bottom radiating element; 1013-left side radiating element;

1014-right side radiating element; 20-parasitic knots; 201-directing to parasitic knots;

202-reflecting parasitic branches; 301-palm upper coverage area; 302-lower palm coverage area;

303-palm right coverage area; 304-palm left coverage area; 200-a mobile phone;

21-a display screen; 211-opening holes; 22-middle frame;

221-a metal middle plate; 222-frame; 2221-top bezel;

2222-bottom bezel; 2223-left side border; 2224-right side border;

23-a circuit board; 24-cell; 25-backshell;

300-protecting sleeve; 3001-a body portion; 3002-wrapping.

Detailed Description

The terminology used in the description of the embodiments of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application, as will be described in detail with reference to the accompanying drawings.

Embodiments of the present application provide an electronic device, which may include, but is not limited to, mobile or fixed terminals with antennas, such as a mobile phone, a tablet computer, a notebook computer, an ultra-mobile personal computer (UMPC), a handheld computer, an intercom, a Point of sale (POS) device, a Personal Digital Assistant (PDA), a wearable device, a virtual reality device, a wireless U-disc, a bluetooth sound/earphone, or a vehicle-mounted front-mounted device, a car recorder, a security device, and the like.

In the embodiment of the present application, the mobile phone 200 is taken as an example of the electronic device, and the mobile phone 200 provided in the embodiment of the present application may be a curved screen mobile phone or a flat screen mobile phone. Fig. 1 and fig. 2 show an overall structure and a split structure of a mobile phone 200, respectively, and a display screen 21 of the mobile phone 200 according to an embodiment of the present application may be a water drop screen, liu Haibing, a full screen or a hole digging screen (see fig. 1), for example, an opening 211 is formed in the display screen 21, and the following description will take the hole digging screen as an example.

Referring to fig. 2, the mobile phone 200 may include: the display screen 21, the middle frame 22, the rear case 25 and the battery 24 located between the middle frame 22 and the rear case 25, wherein the battery 24 may be provided on a side of the middle frame 22 facing the rear case 25 (as shown in fig. 2), or the battery 24 may be provided on a side of the middle frame 22 facing the display screen 21, for example, a side of the middle frame 22 facing the rear case 25 may have a battery compartment (not shown in the drawings) in which the battery 24 is mounted. In some other examples, the mobile phone 200 may further include a circuit board 23, where the circuit board 23 may be disposed on the middle frame 22, for example, the circuit board 23 may be disposed on a side of the middle frame 22 facing the rear case 25 (as shown in fig. 2), or the circuit board 23 may be disposed on a side of the middle frame 22 facing the display 21, and the display 21 and the rear case 25 are located on both sides of the middle frame 22, respectively.

The battery 24 may be connected to the charge management module and the circuit board 23 through a power management module, where the power management module receives input from the battery 24 and/or the charge management module and supplies power to the processor, the internal memory, the external memory, the display screen 21, the camera module, the communication module, and the like. The power management module may also be configured to monitor battery 24 capacity, battery 24 cycle times, battery 24 health (leakage, impedance) and other parameters. In other embodiments, the power management module may also be provided in the processor of the circuit board 23. In other embodiments, the power management module and the charge management module may be disposed in the same device.

When the mobile phone 200 is a flat-screen mobile phone, the display 21 may be an Organic Light-Emitting Diode (OLED) display or a Liquid crystal display (Liquid CRYSTAL DISPLAY, LCD), and when the mobile phone 200 is a curved-screen mobile phone, the display 21 may be an OLED display.

With continued reference to fig. 2, the middle frame 22 may include a metal middle plate 221 and a rim 222, the rim 222 being disposed one week around the outer circumference of the metal middle plate 221. In general, the bezel 222 may include a top frame 2221, a bottom frame 2222, a left side frame 2223, and a right side frame 2224, the top frame 2221, the bottom frame 2222, the left side frame 2223, and the right side frame 2224 enclosing the bezel 222 in a square ring structure. Among them, the material of the metal middle plate 221 includes, but is not limited to, an aluminum plate, an aluminum alloy, stainless steel, a steel aluminum composite die-casting plate, a titanium alloy, a magnesium alloy, or the like. The frame 222 may be a metal frame, a ceramic frame, or a glass frame. When bezel 222 is a metal bezel, the material of the metal bezel includes, but is not limited to, aluminum alloy, stainless steel, steel aluminum composite die cast plate, titanium alloy, or the like. The metal middle plate 221 and the frame 222 may be clamped, welded, glued or integrally formed, or the metal middle plate 221 and the frame 222 may be fixedly connected by injection molding.

Referring to fig. 2, the top frame 2221 and the bottom frame 2222 are oppositely disposed, the left side frame 2223 and the right side frame 2224 are oppositely disposed, the top frame 2221 is connected with one end of the left side frame 2223 and one end of the right side frame 2224 by a rounded corner, and the bottom frame 2222 is connected with the other end of the left side frame 2223 and the other end of the right side frame 2224 by a rounded corner, so as to form a rounded corner rectangular area together. The back shell ground plane is disposed in the rounded rectangular area and is connected to the top frame 2221, the bottom frame 2222, the left side frame 2223, and the right side frame 2224, respectively. It will be appreciated that the back shell ground plane may be the back shell 25 of the handset 200.

The rear case 25 may be a metal rear case, a glass rear case, a plastic rear case, or a ceramic rear case, and in the embodiment of the present application, the material of the rear case 25 is not limited, and is not limited to the above example.

It should be noted that, in some examples, the rear case 25 of the mobile phone 200 may be connected to the bezel 222 to form an integrally formed (Unibody) rear case, for example, the mobile phone 200 may include: the display 21, the metal middle plate 221 and the rear case may be a rear case formed by integrally molding (Unibody) the bezel 222 and the rear case 25, so that the circuit board 23 and the battery 24 are located in a space surrounded by the metal middle plate 221 and the rear case.

It should be understood that the structure illustrated in the embodiment of the present application is not limited to the specific embodiment of the mobile phone 200. In other embodiments of the application, the handset 200 may include more or fewer components than shown, or certain components may be combined, or certain components may be split, or different arrangements of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

In order to implement the communication function of the mobile phone 200, an antenna may be provided on the mobile phone 200, through which signals are transmitted and received. At present, most of mobile phones 200 use Industrial Design (ID) of metal frames and glass backshells, and because the size of the metal frames is limited and the antenna environment is tense, antennas with certain frequency bands can only excite a single mode of the metal frames to be miniaturized as much as possible, so that the performance of the antennas adopting the metal frame Design is greatly influenced by human body parts. Because the human body part belongs to the dielectric medium, when the human body parts such as the head, the hand and the like are close to the antenna, the dielectric medium can influence the performance of the antenna, thereby causing the degradation and deterioration of the performance of the antenna of the product to a certain extent and directly influencing the actual experience of a user. Thus, the wireless performance level of the handset 200 in an actual usage scenario is directly related to the actual experience of the user.

Common usage scenarios generally include a head-hand model (besides HEAD AND HAND, BHH), a head model (besides head, BH), a hand model (hand, H), etc., and the following tables 1 to 3 show the antenna system efficiency and the efficiency degradation level compared with the Free Space (FS) of the lower antenna B1 of a mobile phone 200 in the head-hand model, head model, and hand model scenarios.

Table 1: efficiency value and efficiency amplitude reduction of head-hand model scene relative to free space

Table 2: efficiency value and efficiency reduction of hand model scene relative to free space

Table 3: efficiency value and efficiency reduction of head model scene relative to free space

It is evident from the above tables that the head has a small effect on the antenna efficiency in terms of amplitude reduction, whereas the hand has a large effect on the antenna efficiency, and the hand effect on the antenna directly determines the antenna performance level in the head-hand and hand-mode scenarios. Therefore, how to reduce the amplitude reduction effect of the hand die on the performance of the lower antenna is an important problem to be solved by the antenna.

Taking a lower antenna at the bottom end of a mobile phone as an example, the influence of a hand model on the performance amplitude reduction of the lower antenna is researched, and the fact that the difference of the influence of different areas of a human hand on the performance amplitude reduction of the antenna is larger is found. As shown in fig. 4, the radiation pattern of the lower antenna is relatively balanced toward both the front screen (i.e., display screen 21) and the rear housing 25. In the practical use situation, the hand holds the back case 25 of the mobile phone 200, i.e. the pattern of the back case 25 is greatly affected by the hand model.

Therefore, through the research on the influence of the hand mold on the antenna amplitude reduction, it can be known that if the amplitude reduction of the hand mold is to be reduced, the antenna pattern needs to be adjusted, and the antenna pattern needs to avoid the influence of the hand mold, that is, the antenna pattern needs to be as far as possible towards the display screen 21, and the antenna pattern needs to be as weak as possible towards the rear shell 25, so that the amplitude reduction of the hand mold can be reduced, and the antenna performance, especially the antenna performance under the actual use situation of a user, is improved.

In addition, through experimental tests, as shown in fig. 5-8, different areas of the hand model can be cut off, and the difference of influence of the different areas of the hand on performance degradation of the antenna can be verified. Fig. 5 is a simulated scene view of the palm top coverage area 301 removed in a hand mold scene, fig. 6 is a simulated scene view of the palm bottom coverage area 302 removed in a hand mold scene, fig. 7 is a simulated scene view of the palm right coverage area 303 removed in a hand mold scene, fig. 8 is a simulated scene view of the palm left coverage area 304 removed in a hand mold scene, and the results are shown in fig. 9 by simulating the hand mold of the different cutting areas shown in fig. 5-8.

In fig. 9, S1 is a radiation curve corresponding to the antenna when any region is not removed in the hand model scene, S2 is a radiation curve corresponding to the antenna when the upper palm coverage region 301 (i.e. the scene corresponding to fig. 5) is removed in the hand model scene, S3 is a radiation curve corresponding to the antenna when the lower palm coverage region 302 (i.e. the scene corresponding to fig. 6) is removed in the hand model scene, S4 is a radiation curve corresponding to the antenna when the right palm coverage region 303 (i.e. the scene corresponding to fig. 7) is removed in the hand model scene, S5 is a radiation curve corresponding to the antenna when the left palm coverage region 304 (i.e. the scene corresponding to fig. 8) is removed in the hand model scene, and it is known that the upper palm region and the lower palm region are main factors influencing the radiation performance of the antenna when the hand model influence of the two parts can be eliminated or weakened, so that the antenna efficiency in the hand model scene can be significantly improved.

Based on the above description, the embodiment of the present application provides an antenna device, which may be applied to an electronic device (for example, a mobile phone 200), where at least one parasitic branch is disposed between a radiating unit and a display screen or between the radiating unit and a rear case, and the parasitic branch is used to change the radiation pattern characteristic of the radiating unit, so that the radiation pattern of the radiating unit faces the display screen, and thus, when a human hand approaches the rear case of the electronic device, the adverse effect of the human body part on the antenna performance is reduced, and the actual experience of the user is improved.

It should be noted that, the antenna device provided by the present application is suitable for an electronic device employing any one or more of the following communication technologies, for example, long term evolution (long term evolution, LTE) communication technology, wi-Fi communication technology, 5G communication technology, SUB-6G communication technology, and other MIMO communication technologies in the future.

The specific structure of the antenna device will be described below with reference to the specific drawings (the following embodiments do not emphasize the need for a communication network, and only illustrate the operation characteristics of the antenna device in terms of frequency size).

An embodiment of the present application provides an antenna apparatus 100, where the antenna apparatus 100 is applied to a mobile phone 200, and the mobile phone 200 may include a display screen 21, a rear case 25, and a middle frame 22 (see fig. 2) located between the display screen 21 and the rear case 25, and referring to fig. 10 and 11, the antenna apparatus 100 may include: at least one radiating element 10 and at least one parasitic stub 20 (e.g., leading to parasitic stub 201 and reflecting parasitic stub 202), the parasitic stub 20 being used to alter the radiation pattern characteristics of the radiating element 10.

The parasitic branch 20 is located on a side of the radiating element 10 facing the display screen 21, or the parasitic branch 20 is located on a side of the radiating element 10 facing the rear case 25. By arranging at least one parasitic branch 20 on the side of the radiating unit 10 facing the display screen 21 or the side of the radiating unit 10 facing the rear shell 25, the parasitic branch 20 is used for changing the radiation pattern characteristic of the radiating unit 10, so that the radiation electromagnetic wave of the radiating unit 10 faces the display screen 21 or the rear shell 25, and when the hand or the head approaches the rear shell 25 or the display screen 21 of the mobile phone 200, the adverse effect of the human body part on the antenna performance is reduced, and the actual experience of the user is improved.

It should be noted that, in the embodiment of the present application, referring to fig. 12, the distance L2 between the parasitic branch 20 and the radiating element 10 may be smaller than 1/4 wavelength corresponding to the resonant frequency of the radiating element 10. In addition, the shape of the parasitic dendrite 20 may be a linear shape or a curved shape, which is not limited in the embodiment of the present application.

In addition, in fig. 13, S1 is a graph of radiation efficiency corresponding to the case of using the parasitic branch 201, S2 is a graph of radiation efficiency corresponding to the case of using the reflective parasitic branch 202, and as shown in fig. 13, for the radiation unit 10 operating at 2.2GHz to 2.6GHz, after adding different parasitic branches 20, the efficiency corresponding to the parasitic branch 201 is before 2.2GHz to 2.6GHz, and the efficiency corresponding to the reflective parasitic branch 202 is after 2.2GHz to 2.6 GHz.

In the hand-molded scenario, i.e., where a hand is holding the phone (where the hand is near the back case 25 of the phone), the structure and arrangement of the parasitic dendrites 20 includes, but is not limited to, the following several possible implementations:

One possible implementation is: as shown in fig. 14, the parasitic stub 20 may include: at least one of the directing parasitic dendrites 201, at least one of the directing parasitic dendrites 201 being located on a side of the radiating element 10 facing the display screen 21, and the directing parasitic dendrites 201 being configured to direct the radiated electromagnetic waves of the radiating element 10 in a direction towards the display screen 21. The parasitic branch 201 may be a director, and by setting at least one parasitic branch 201 on a side of the radiating unit 10 facing the display screen 21, the radiating electromagnetic wave of the radiating unit 10 can face the display screen 21, so as to avoid adverse effects on the antenna performance of the mobile phone 200 when the hand approaches the rear shell 25 of the mobile phone 200.

Another possible implementation is: as shown in fig. 15, the parasitic stub 20 may include: at least one reflecting parasitic stub 202, the at least one reflecting parasitic stub 202 being located on a side of the radiating element 10 facing the rear housing 25, and the reflecting parasitic stub 202 being configured to reflect the radiated electromagnetic wave of the radiating element 10 in a direction towards the display screen 21. The reflection parasitic branch 202 may be a reflector, and by arranging at least one reflection parasitic branch 202 on a side of the radiation unit 10 facing the rear housing 25, the radiation electromagnetic wave of the radiation unit 10 can deviate from the rear housing 25 (i.e. face the display screen 21), so as to avoid adverse effects on the antenna performance of the mobile phone 200 when the hand approaches the rear housing 25 of the mobile phone 200.

Yet another possible implementation is: as shown in fig. 16, the parasitic stub 20 may include: at least one directing parasitic leg 201 and at least one reflecting parasitic leg 202, at least one directing parasitic leg 201 being located on a side of the radiating element 10 facing the display screen 21, the directing parasitic leg 201 being for directing the radiated electromagnetic wave of the radiating element 10 in a direction towards the display screen 21. At least one reflecting parasitic stub 202 is located on a side of the radiating element 10 facing the rear housing 25, the reflecting parasitic stub 202 being adapted to reflect the radiated electromagnetic waves of the radiating element 10 in a direction towards the display screen 21. By providing at least one guiding parasitic node 201 on the side of the radiating element 10 facing the display screen 21 and providing at least one reflecting parasitic node 202 on the side of the radiating element 10 facing the rear case 25, it is possible to further make the radiated electromagnetic wave of the radiating element 10 facing the display screen 21, thereby avoiding to a greater extent adverse effects on the antenna performance of the mobile phone 200 when a human hand approaches the rear case 25 of the mobile phone 200.

Referring to fig. 3, at least one radiation unit 10 may include: the bottom radiating element 1012, in the embodiment of the present application, a side of the bottom radiating element 1012 facing the display screen 21 is provided with a guiding parasitic branch 201, or a side of the bottom radiating element 1012 facing the rear case 25 is provided with a reflecting parasitic branch 202, or a side of the bottom radiating element 1012 facing the display screen 21 is provided with a guiding parasitic branch 201, and a side of the bottom radiating element 1012 facing the rear case 25 is provided with a reflecting parasitic branch 202.

For example, the parasitic branch 201 may be located on a side of the display screen 21 facing the middle frame 22, and the parasitic branch 201 is located in a projection area of the bottom radiating element 1012 on the display screen 21, so that the radiated electromagnetic wave of the bottom radiating element 1012 faces the direction of the display screen 21. The embodiment of the present application is not limited to the specific fixing position of the parasitic branch 20, nor to the above example.

In the head mold scenario, i.e. where the human head is close to the mobile phone (where the head is close to the display 21 of the mobile phone), the structure and arrangement of the parasitic knots 20 include, but are not limited to, the following several possible implementations:

One possible implementation is: the parasitic branch 20 may include: at least one of the directing parasitic dendrites 201, at least one of the directing parasitic dendrites 201 being located on a side of the radiating element 10 facing the rear shell 25, and the directing parasitic dendrites 201 being configured to direct the radiated electromagnetic wave of the radiating element 10 in a direction towards the rear shell 25. Through setting up at least one and guiding parasitic branch in the side of radiation unit towards the backshell, can make the radiation electromagnetic wave of radiation unit towards the backshell to this avoids human head to be close to when the backshell of electronic equipment, causes harmful effect to the antenna performance of electronic equipment.

Another possible implementation is: the parasitic branch 20 may include: at least one reflecting parasitic stub 202, the at least one reflecting parasitic stub 202 being located on a side of the radiating element 10 facing the display screen 21, and the reflecting parasitic stub 202 being configured to reflect the radiated electromagnetic wave of the radiating element 10 in a direction towards the rear housing 25. Through setting up at least one reflection parasitic branch in the side of radiating element towards the display screen, can make radiating element's radiation electromagnetic wave deviate from the display screen (i.e. towards the backshell) to this avoids human head to be close to when the backshell of electronic equipment, causes harmful effect to electronic equipment's antenna performance.

Yet another possible implementation is: the parasitic dendrites may include: at least one directing parasitic branch 201 and at least one reflecting parasitic branch 202, wherein the at least one directing parasitic branch 201 is located on a side of the radiating element 10 facing the rear housing 25, and the directing parasitic branch 201 is for directing the radiated electromagnetic wave of the radiating element 10 in a direction towards the rear housing 25. At least one reflecting parasitic stub 202 is located on the side of the radiation unit 10 facing the display screen 21, the reflecting parasitic stub 202 being adapted to reflect the radiated electromagnetic waves of the radiation unit 10 in a direction towards the rear housing 25. Through setting up at least one and guiding parasitic branch in the side of radiation unit towards the backshell to set up at least one reflection parasitic branch in the side of radiation unit towards the display screen, can make the radiation electromagnetic wave of radiation unit towards the backshell further, when avoiding human head to be close to electronic equipment's backshell with this to a greater extent, cause harmful effects to electronic equipment's antenna performance.

Referring to fig. 3, at least one radiation unit 10 may include: in the embodiment of the present application, the side of the top radiating element 1011 facing the display screen 21 is provided with a reflective parasitic branch 202, or the side of the top radiating element 1011 facing the rear case 25 is provided with a guide parasitic branch 201, or the side of the top radiating element 1011 facing the display screen 21 is provided with a reflective parasitic branch 202, and the side of the top radiating element 1011 facing the rear case 25 is provided with a guide parasitic branch 201.

It should be noted that, in the embodiment of the present application, the length L1 of the guiding parasitic branch 201 may be smaller than 1/2 wavelength corresponding to the resonant frequency of the radiating unit 10, and the length L1 of the reflecting parasitic branch 202 may be larger than 1/2 wavelength corresponding to the resonant frequency of the radiating unit 10.

Further, in some embodiments, the radiating element 10 may be a metal radiator formed by breaking two breaks for the metal bezel of the mobile phone. Specifically, the middle frame 22 may be a metal middle frame, and the metal middle frame includes at least a metal frame, where the metal frame forms at least one metal radiator in the antenna device 100, and the metal radiator serves as the radiating unit 10. Referring to fig. 3, the top radiating element 1011 is a metal radiator formed by breaking two breaks (break a and break b) in the top metal frame (i.e., top frame 2221) of the mobile phone, and the bottom radiating element 1012 is a metal radiator formed by breaking two breaks (break a and break b) in the bottom metal frame (i.e., bottom frame 2222) of the mobile phone.

Of course, in other embodiments, the at least one radiating element 10 may further include a left radiating element 1013 and a right radiating element 1014, wherein the left radiating element 1013 is a metal radiator formed by breaking two breaks (break e and break f) for a left metal bezel (i.e., left bezel 2223) of the mobile phone, and the right radiating element 1014 is a metal radiator formed by breaking two breaks (break g and break h) for a right metal bezel (i.e., right bezel 2224) of the mobile phone.

Also, a parasitic stub 20 may be provided between the left radiating element 1013 and the display screen 21, or a parasitic stub 20 may be provided between the left radiating element 1013 and the rear case 25, or a parasitic stub 20 may be provided between the left radiating element 1013 and the display screen 21 and between the left radiating element 1013 and the rear case 25. A parasitic branch 20 may be disposed between the right side radiating element 1014 and the display screen 21, or a parasitic branch 20 may be disposed between the right side radiating element 1014 and the rear case 25, or a parasitic branch 20 may be disposed between the right side radiating element 1014 and the display screen 21, and between the right side radiating element 1014 and the rear case 25.

The top radiating element 1011, the bottom radiating element 1012, the left radiating element 1013, and the right radiating element 1014 may be diversity antennas (DIV ANTENNA), WIFI antennas, bluetooth antennas, and GPS antennas, main antennas (MAIN ANTENNA), or medium-high frequency Multiple-Input Multiple-Output (MIMO) antennas. When the bottom radiating element 1012 is a main antenna, the main antenna is located at the bottom of the mobile phone 200, so that the absorption emissivity (Specific Absorption Rate, SAR) of the mobile phone 200 is low.

Fig. 17 shows a performance curve of the antenna device 100 provided in the embodiment of the present application in free space. Referring to fig. 17, A1 is a graph of a frequency-dependent reflection coefficient of an antenna corresponding to the antenna device 100 in free space, A2 is a graph of a frequency-dependent radiation efficiency of the antenna device 100 corresponding to the antenna device 100 provided in the embodiment of the present application, and A3 is a graph of a frequency-dependent total efficiency of the antenna device 100 corresponding to the antenna device 100 provided in the embodiment of the present application.

In addition, fig. 18, 19, 20 and 21 are respectively corresponding radiation patterns of the antenna device 100 provided in the embodiment of the present application under different working scenarios, and it can be seen from the figures that, compared with the radiation performance pattern of the antenna device in the free space in the electronic device in the prior art, that is, the pattern shown in fig. 4, the radiation pattern characteristics of the antenna device 100 provided in the embodiment of the present application are obviously changed, and the main radiation pattern is completely oriented to the direction of the display screen 21. Further, as can be seen from comparing fig. 18 and 19 with fig. 20 and 21, by adopting the antenna device 100 provided by the embodiment of the present application, the influence of the human body part on the radiation pattern characteristic of the radiation unit 10 can be made smaller.

In addition, through application evaluation of three antenna devices 100 in different simulation scenes, namely, free space, right-hand mode and left-hand mode, as shown in fig. 22, A1 is a reflection coefficient curve graph corresponding to the antenna device 100 in the free space provided by the embodiment of the present application, A2 is a radiation efficiency curve graph corresponding to the antenna device 100 in the free space provided by the embodiment of the present application, B1 is a reflection coefficient curve graph corresponding to the antenna device 100 in the right-hand mode provided by the embodiment of the present application, B2 is a radiation efficiency curve graph corresponding to the antenna device 100 in the right-hand mode provided by the embodiment of the present application, C1 is a reflection coefficient curve graph corresponding to the antenna device 100 in the left-hand mode provided by the embodiment of the present application, and C2 is a radiation efficiency curve graph corresponding to the antenna device 100 in the left-hand mode provided by the embodiment of the present application. As can be seen from fig. 22, by adopting the antenna device 100 provided by the embodiment of the present application, the efficiency degradation of the left and right hands of the antenna is 3.7dB and 3.3dB, respectively, and the degradation is significantly reduced compared with the data shown in table 1, and the antenna performance in the hand-held scenario is significantly improved.

And, through application evaluation of the antenna performance of the three antenna devices 100 in the free space, the left-hand mode and the left-hand mode, as shown in fig. 23, A2 is a graph of radiation efficiency corresponding to the antenna device 100 in the free space, C2 is a graph of radiation efficiency corresponding to the antenna device 100 in the left-hand mode, and D2 is a graph of radiation efficiency corresponding to the antenna device 100 in the left-hand mode, as shown in fig. 23, the efficiency degradation of the left-hand and the left-hand of the antenna device 100 in the embodiment of the application is significantly reduced compared with the data shown in table 1 and fig. 2, and the antenna performance in the hand-held mode is significantly improved.

In addition, it should be noted that, in some embodiments, the radiation unit 10 may be disposed on an inner surface of the rear case, and in particular, the radiation unit 10 may be a suspended metal, a graphene layer, or a transparent conductive layer. Of course, in other embodiments, the radiating element 10 may not be limited to a suspended metal antenna, a graphene antenna, and a transparent antenna, for example, the radiating element 10 disposed on the inner surface of the rear case 25 may also be other antenna elements disposed on the inner surface of the rear case 25 that can be coupled to radiate signals.

Thus, the feeding network can be mostly realized through the radiation unit 10 arranged on the inner surface of the battery cover, so that the layout area of the antenna on the metal frame can be reduced, the influence on other antennas is reduced, the antenna device can be realized in a limited design space, and the antenna design space inside the electronic equipment is effectively saved to a certain extent. To a certain extent, the antenna device 100 can be implemented in a limited design space, so that the antenna design space inside the mobile phone 200 is effectively saved. In addition, the antenna device 100 does not need to provide additional slots on the metal frame of the middle frame 22, which does not affect the industrial design appearance of the mobile phone 200, and can effectively reduce the hand-holding effect.

It should be noted that, the radiating element 10 may be printed or adhered to the inner surface of the rear housing 25, or the radiating element 10 may be embedded in the inner surface of the rear housing 25, and the specific arrangement of the radiating element 10 on the inner surface of the rear housing 25 is not limited, and is not limited to the above examples. Of course, in other embodiments, the radiation unit 10 may be disposed on the outer surface of the rear housing 25, which is not limited in this embodiment of the present application.

It will be appreciated that in some embodiments, the antenna device 100 provided by the embodiments of the present application may include multiple sets of radiating elements 10 to add more radiators, and by increasing the number of radiators, the antenna device 100 can achieve coverage in more modes.

In addition, the embodiment of the application also provides an electronic device assembly, which can include: the electronic device and the protective case 300 (see fig. 24 and 25) located outside the electronic device, where, taking the electronic device as the mobile phone 200 as an example, the mobile phone 200 may at least include: the display screen 21, the rear case 25, the antenna device 100, and the center 22 between the display screen 21 and the rear case 25. The antenna device 100 may include: at least one radiating element 10 and at least one parasitic stub 20, the parasitic stub 20 being for changing the radiation pattern characteristics of the radiating element 10, and the parasitic stub 20 being located on the protective sheath 300.

By providing the parasitic dendrite 20 for changing the radiation pattern characteristic of the radiation unit on the protective cover 300, the radiation electromagnetic wave of the radiation unit 10 can be directed to the display screen 21 or the rear case 25, so that when the hand or the head approaches the rear case or the display screen of the mobile phone 200, the adverse effect of the human body part on the antenna performance is reduced, thereby improving the actual experience of the user.

It should be noted that, in the embodiment of the present application, the distance between the parasitic node 20 and the radiating element 10 is less than 1/4 wavelength corresponding to the resonant frequency of the radiating element 10.

With continued reference to fig. 24 and 25, the protective sheath 300 may include at least: the mobile phone comprises a main body portion 3001 and a wrapping portion 3002 connected with the main body portion 3001, wherein the main body portion 3001 is attached to the rear case 25, the wrapping portion 3002 is arranged around at least part of the metal frame of the mobile phone 200, and the wrapping portion 3002 covers at least part of the joint between the metal frame and the display screen 21 and the joint between the metal frame and the rear case 25. The parasitic branch 20 is arranged on one side of the wrapping portion 3002 close to the rear shell 25, or the parasitic branch 20 is arranged on one side of the wrapping portion 3002 close to the display screen 21, or the parasitic branch 20 is arranged on one side of the wrapping portion 3002 close to the rear shell 25 and one side of the wrapping portion 3002 close to the display screen 21.

Specifically, in the hand model scenario, i.e. the scenario where a hand is holding the mobile phone (where the hand is near the back shell 25 of the mobile phone), the structure and arrangement of the parasitic knots 20 includes, but is not limited to, the following several possible implementations:

One possible implementation is: the parasitic branch 20 may include: at least one of the guide parasitic branches 201, at least one of the guide parasitic branches 201 being located on a side of the wrapping portion 3002 near the display screen 21, and the guide parasitic branches 201 being for guiding the radiation electromagnetic wave of the radiation unit to a direction toward the display screen 21. By providing at least one parasitic branch 201 on the side of the wrapping portion 3002 near the display screen 21, the radiation electromagnetic wave of the radiation unit 10 can be directed toward the display screen 21, so as to avoid adverse effects on the antenna performance of the mobile phone 200 when a human hand approaches the rear case 25 of the mobile phone 200.

Another possible implementation is: the parasitic branch 20 may include: at least one reflecting parasitic stub 202, the at least one reflecting parasitic stub 202 being located on a side of the wrapping portion 3002 near the rear case 25, and the reflecting parasitic stub 202 being for reflecting the radiant electromagnetic wave of the radiating unit to a direction toward the display screen 21. By providing at least one reflection parasitic branch 202 on the side of the wrapping portion 3002 near the rear case 25, the radiation electromagnetic wave of the radiation unit 10 can deviate from the rear case 25 (i.e. towards the display screen 21), so as to avoid adverse effects on the antenna performance of the mobile phone 200 when the hand approaches the rear case 25 of the mobile phone 200.

Yet another possible implementation is: the parasitic branch 20 may include: at least one directing parasitic branch 201 and at least one reflecting parasitic branch 202, wherein the at least one directing parasitic branch 201 is located on a side of the wrapping 3002 near the display screen 21, the directing parasitic branch 201 being for directing the radiated electromagnetic wave of the radiating element in a direction towards the display screen 21. At least one reflecting parasitic stub 202 is located on a side of the wrapping 3002 near the rear case 25, the reflecting parasitic stub 202 being for reflecting the radiant electromagnetic wave of the radiating unit to a direction toward the display screen 21. By providing at least one guiding parasitic node 201 on the side of the wrapping portion 3002 close to the display screen 21 and providing at least one reflecting parasitic node 202 on the side of the wrapping portion 3002 close to the rear case 25, the radiation electromagnetic wave of the radiation unit 10 can be further directed to the display screen 21, so that the adverse effect on the antenna performance of the mobile phone 200 is avoided to a greater extent when the human hand approaches the rear case 25 of the mobile phone 200.

In the head mold scenario, i.e., where the human head is close to the mobile phone (where the head is close to the display 21 of the mobile phone), the structure and arrangement of the parasitic dendrites 2020 includes, but is not limited to, the following several possible implementations:

One possible implementation is: the parasitic branch 20 may include: at least one of the guide parasitic branches 201, wherein the at least one guide parasitic branch 201 is located on a side of the wrapping portion 3002 near the rear case 25, and the guide parasitic branch 201 is for guiding the radiation electromagnetic wave of the radiation unit to a direction toward the rear case 25. By providing at least one parasitic branch 201 on a side of the wrapping portion 3002 near the rear case 25, the radiation electromagnetic wave of the radiation unit can be directed toward the rear case 25, so as to avoid adverse effects on the antenna performance of the mobile phone 200 when the human head approaches the rear case 25 of the mobile phone 200.

Another possible implementation is: the parasitic branch 20 may include: at least one reflecting parasitic stub 202, the at least one reflecting parasitic stub 202 being located on a side of the wrapping portion 3002 near the display screen 21, and the reflecting parasitic stub 202 being for reflecting the radiant electromagnetic wave of the radiating unit to a direction toward the rear case 25. By arranging at least one reflection parasitic branch 202 on one side of the wrapping portion 3002 close to the display screen 21, the radiation electromagnetic wave of the radiation unit can deviate from the display screen 21 (i.e. face towards the rear shell 25), so that adverse effects on the antenna performance of the mobile phone 200 when the human head approaches the rear shell 25 of the mobile phone 200 are avoided.

Yet another possible implementation is: the parasitic branch 20 may include: at least one directing parasitic branch 201 and at least one reflecting parasitic branch 202, wherein the at least one directing parasitic branch 201 is located on a side of the envelope 3002 near the back shell 25, the directing parasitic branch 201 being for directing the radiated electromagnetic wave of the radiating element in a direction towards the back shell 25. At least one reflecting parasitic stub 202 is located on a side of the wrapping 3002 near the display screen 21, the reflecting parasitic stub 202 being configured to reflect the radiant electromagnetic wave of the radiating element in a direction towards the rear housing 25. By providing at least one guiding parasitic node 201 on the side of the wrapping portion 3002 facing the rear case 25 and providing at least one reflecting parasitic node 202 on the side of the wrapping portion 3002 facing the display screen 21, it is possible to further direct the radiated electromagnetic wave of the radiating unit toward the rear case 25, thereby avoiding the adverse effect on the antenna performance of the mobile phone 200 when the human head approaches the rear case 25 of the mobile phone 200 to a greater extent.

In the embodiment of the present application, the middle frame 22 may be a metal middle frame 22, and the metal middle frame 22 may at least include a metal frame, where the metal frame forms at least one metal radiator 101 in the antenna device, and the metal radiator 101 is used as the radiating unit 10.

It should be noted that, in the embodiment of the present application, the length of the parasitic branch 201 is less than 1/2 wavelength corresponding to the resonant frequency of the radiating element 10, and the length of the reflective parasitic branch 202 is greater than 1/2 wavelength corresponding to the resonant frequency of the radiating element 10.

In addition, it should be noted that, the electronic device provided in the embodiment of the present application may be a folding screen electronic device (for example, a folding screen mobile phone), so that when the folding screen is in a closed state, the performance of the antenna hand mold, the antenna head mold or the antenna head hand mold can be improved by changing the radiation pattern.

In describing embodiments of the present application, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "coupled" should be construed broadly, and may be, for example, fixedly coupled, indirectly coupled through an intermediary, in communication between two elements, or in an interaction relationship between two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

The embodiments of the application may be implemented or realized in any number of ways, including as a matter of course, such that the apparatus or elements recited in the claims are not necessarily oriented or configured to operate in any particular manner. In the description of the embodiments of the present application, the meaning of "a plurality" is two or more unless specifically stated otherwise.

The terms first, second, third, fourth and the like in the description and in the claims and in the above-described figures, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented, for example, in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "may include" and "have," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the embodiments of the present application, and are not limited thereto; although embodiments of the present application have been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An electronic device, characterized in that,

The display screen is provided with a display screen,

The back shell is provided with a plurality of grooves,

The middle frame is positioned between the display screen and the rear shell and at least comprises a metal frame;

The antenna device comprises a radiating unit taking the metal frame as a radiator and at least one parasitic branch, wherein the parasitic branch and the metal frame are arranged at intervals in the thickness direction of the electronic equipment;

the distance between the parasitic branches and the metal frame in the thickness direction of the electronic equipment is smaller than 1/4 wavelength corresponding to the resonance frequency of the radiating unit;

The radiation unit of the antenna device is used for working in a first frequency band, wherein the first frequency band is a frequency band from a first frequency to a second frequency, and the first frequency is smaller than the second frequency;

The resonance frequency generated by the parasitic branch of the antenna device is higher than the second frequency, or the resonance frequency generated by the parasitic branch of the antenna device is lower than the first frequency;

the parasitic branch is for directing a radiation pattern of the radiating element toward at least one of the display screen and the rear housing.

2. The electronic device of claim 1, wherein the parasitic stub includes a guide parasitic stub having a length less than 1/2 wavelength corresponding to a resonant frequency of the radiating element, the guide parasitic stub resonant frequency being higher than the second frequency.

3. The electronic device of claim 2, wherein the directing parasitic dendrites include a first directing parasitic dendrite that is located on a side of the radiating element toward the display screen, the first directing parasitic dendrite being configured to direct a radiation pattern of the radiating element toward the display screen.

4. The electronic device of claim 3, wherein the first directing parasitic stub is located on the display screen and the first directing parasitic stub is located within a projection area of the radiating element on the display screen.

5. The electronic device of any one of claims 1-4, wherein the parasitic dendrite comprises a reflective parasitic dendrite comprising a first reflective parasitic dendrite;

The first reflective parasitic dendrite is located at a side of the radiating element facing the rear case, and reflects a radiation pattern of the radiating element to a direction facing the display screen.

6. The electronic device of claim 5, wherein the first reflective parasitic stub is located on a side of the rear housing that faces the center frame.

7. The electronic device of claim 5, wherein the metal bezel comprises a bottom metal bezel,

The radiation unit comprises a bottom radiation unit, and the bottom metal frame forms the bottom radiation unit;

the distance between the first guiding parasitic branch and the bottom metal frame in the thickness direction of the electronic equipment is smaller than 1/4 wavelength corresponding to the resonance frequency of the radiating unit, and the distance between the first reflecting parasitic branch and the bottom metal frame in the thickness direction of the electronic equipment is smaller than 1/4 wavelength corresponding to the resonance frequency of the radiating unit.

8. The electronic device of any of claims 2-7, wherein the parasitic branch includes a second parasitic branch on a side of the radiating element facing the rear housing, the second parasitic branch being configured to direct a radiation pattern of the radiating element in a direction toward the rear housing.

9. The electronic device of claim 8, wherein the second directing parasitic dendrite is located on a side of the back shell facing the radiating element and the second directing parasitic dendrite is located within a projection area of the radiating element on the back shell.

10. The electronic device of any one of claims 1-9, wherein the parasitic dendrites include a reflective parasitic dendrite that includes a second reflective parasitic dendrite that is located on a side of the radiating element facing the display screen that reflects a radiation pattern of the radiating element to a direction toward the rear housing.

11. The electronic device of claim 10, wherein the second reflective parasitic stub is located on the display screen.

12. The electronic device of claim 10, wherein the metal bezel comprises a top metal bezel,

The radiating element comprises a top radiating element, and the top metal frame forms the top radiating element;

The distance between the second guiding parasitic branch and the top metal frame in the thickness direction of the electronic equipment is smaller than 1/4 wavelength corresponding to the resonance frequency of the radiating unit, and the distance between the second reflecting parasitic branch and the top metal frame in the thickness direction of the electronic equipment is smaller than 1/4 wavelength corresponding to the resonance frequency of the radiating unit.

13. The electronic device of any one of claims 5 to 7, wherein the length of the reflective parasitic stub is greater than 1/2 wavelength corresponding to the resonant frequency of the radiating element; the reflected parasitic branch produces a resonant frequency lower than the first frequency.

14. An electronic device assembly, comprising: electronic equipment and a protective sleeve positioned outside the electronic equipment;

The electronic device includes at least: the display screen, the backshell, the radiating element and the middle frame that is located between the display screen and the backshell, the middle frame includes at least metal frame, the radiating element uses the metal frame as the radiator;

the protective sleeve comprises at least one parasitic branch, and the parasitic branch and the metal frame are arranged at intervals in the thickness direction of the electronic equipment;

The distance between the parasitic branches and the metal frame is smaller than 1/4 wavelength corresponding to the resonance frequency of the radiating unit;

The radiation unit is used for working in a first frequency band, wherein the first frequency band is a frequency band from a first frequency to a second frequency, and the first frequency is smaller than the second frequency;

the parasitic dendrite produces a resonant frequency that is higher than the second frequency or the parasitic dendrite produces a resonant frequency that is lower than the first frequency.

15. The electronic device assembly of claim 14, wherein the protective sleeve comprises at least: a main body portion and a wrapping portion connected to the main body portion;

The main body part is attached to the rear shell, the wrapping part is arranged around at least part of the metal frame of the electronic equipment, and the wrapping part covers the joint of the metal frame and the display screen and the joint of the metal frame and the rear shell;

The parasitic branch is arranged on one side of the wrapping part, which is close to the rear shell; or the parasitic branches are arranged on one side of the wrapping part, which is close to the display screen; or the parasitic branches are arranged on one side of the wrapping part close to the rear shell and one side of the wrapping part close to the display screen.

16. The electronic device assembly of claim 14 or 15, wherein the parasitic dendrite includes at least one of a directing parasitic dendrite and a reflecting parasitic dendrite;

the distance between the guide parasitic branches and the metal frame is smaller than 1/4 wavelength corresponding to the resonant frequency of the radiating unit, and the guide parasitic branches are used for guiding the radiation direction diagram of the radiating unit to the direction of the display screen or the direction of the rear shell;

the distance between the reflection parasitic branches and the metal frame is smaller than 1/4 wavelength corresponding to the resonant frequency of the radiation unit, and the reflection parasitic branches are used for reflecting the radiation pattern of the radiation unit to the direction facing the rear shell or to the direction facing the display screen.

17. The electronic device assembly of claim 16, wherein the electronic device assembly comprises a plurality of electronic devices,

The length of the guide parasitic branch is smaller than 1/2 wavelength corresponding to the resonance frequency of the radiation unit;

The length of the reflection parasitic branch is larger than 1/2 wavelength corresponding to the resonance frequency of the radiation unit.

18. The electronic device assembly of claim 16 or 17, wherein the steering parasitic branch resonant frequency is higher than the second frequency;

The reflected parasitic branch produces a resonant frequency lower than the first frequency.