Antenna device, electronic device, and electronic device component

Abstract

An embodiment of the present application provides an antenna device, an electronic device, and an electronic device assembly. The antenna device is configured with at least one parasitic branch on the side of the radiating unit facing the display screen or the side of the radiating unit facing the rear housing. The parasitic branch is used to change the radiation pattern characteristics of the radiating unit, thereby reducing the adverse effects of human body parts on antenna performance, thereby improving the user's actual experience.

Description

[0001] This application is filed with the China Patent Office with application number 202110378226.5 and application date April 8, 2021.

[0002] A divisional application of the invention patent application titled "Antenna device, electronic device and electronic device component." Technical Field

[0003] The embodiments of the present application relate to the field of terminal technology, and in particular to an antenna device, an electronic device, and an electronic device component. Background Art

[0004] With the advancement of information technology, the wireless performance of terminal products has become increasingly important. For example, many national certifications and operator access requirements have set clear and high wireless performance requirements for terminal products such as mobile phones. The wireless performance of terminal products in actual consumer usage scenarios is directly related to the actual user experience. These common usage scenarios include the head and hand (BHH) and hand (H) phantoms for mobile phone products. These scenarios are also common test scenarios for national certification and operator access. Because human parts such as the head and hands are dielectric, when these parts are close to the antenna, the dielectric will affect the antenna's performance, causing a certain degree of degradation in the product's antenna performance.

[0005] Taking mobile phones as an example, conventional antennas are typically installed on the back or middle frame of mobile phones. For example, in devices with metal frames or glass backs, conventional antenna designs typically create multi-segment antennas from the metal frame. However, proximity to the antenna by human parts like the head and hands can degrade the performance of the mobile phone's antenna. Therefore, mitigating the impact of human body parts on antenna performance is a critical challenge facing the antenna industry. Summary of the Invention

[0006] The embodiments of the present application provide an antenna device, an electronic device, and an electronic device component, which can reduce the adverse effects of human body parts on antenna performance, thereby improving the user's actual experience.

[0007] A first aspect of an embodiment of the present application provides an antenna device, which is applied to an electronic device, wherein the electronic device includes a display screen, a back cover, and a middle frame located between the display screen and the back cover, and the antenna device includes: at least one radiating unit and at least one parasitic branch, wherein the parasitic branch is used to change the radiation pattern characteristics of the radiating unit; the parasitic branch is located on the side of the radiating unit facing the display screen; or, the parasitic branch is located on the side of the radiating unit facing the back cover.

[0008] The antenna device provided in an embodiment of the present application is configured such that at least one parasitic branch is provided on the side of the radiating unit facing the display screen or the side of the radiating unit facing the back shell. The parasitic branch is used to change the radiation pattern characteristics of the radiating unit so that the radiated electromagnetic waves of the radiating unit are directed toward the display screen or the back shell. In this way, when a human hand or head approaches the back shell or the display screen of the electronic device, the adverse effects of the human body on the antenna performance are reduced, thereby improving the actual user experience.

[0009] In a possible implementation, the parasitic branch includes: at least one directing parasitic branch; the at least one directing parasitic branch is located on a side of the radiation unit facing the display screen, and the directing parasitic branch is used to direct the electromagnetic waves radiated by the radiation unit toward the display screen;

[0010] Alternatively, the parasitic branch includes: at least one reflective parasitic branch, the at least one reflective parasitic branch being located on a side of the radiation unit facing the rear housing, and the reflective parasitic branch being configured to reflect the electromagnetic waves radiated by the radiation unit in a direction toward the display screen;

[0011] Alternatively, the parasitic branch includes: at least one directing parasitic branch and at least one reflecting parasitic branch; the at least one directing parasitic branch is located on the side of the radiating unit facing the display screen, and the directing parasitic branch is used to direct the radiated electromagnetic waves of the radiating unit in the direction toward the display screen; the at least one reflecting parasitic branch is located on the side of the radiating unit facing the rear shell, and the reflecting parasitic branch is used to reflect the radiated electromagnetic waves of the radiating unit in the direction toward the display screen.

[0012] By providing at least one directing parasitic branch on the side of the radiating unit facing the display screen, the radiated electromagnetic waves of the radiating unit can be directed toward the display screen. By providing at least one reflecting parasitic branch on the side of the radiating unit facing the rear housing, the radiated electromagnetic waves of the radiating unit can be directed away from the rear housing (i.e., toward the display screen), thereby preventing a human hand from approaching the rear housing of the electronic device from adversely affecting the antenna performance of the electronic device. By providing at least one directing parasitic branch on the side of the radiating unit facing the display screen, and providing at least one reflecting parasitic branch on the side of the radiating unit facing the rear housing, the radiated electromagnetic waves of the radiating unit can be further directed toward the display screen, thereby further preventing a human hand from approaching the rear housing of the electronic device from adversely affecting the antenna performance of the electronic device.

[0013] In one possible implementation, the at least one radiating unit includes: a bottom radiating unit; the bottom radiating unit is provided with the guiding parasitic branch on the side facing the display screen, or the bottom radiating unit is provided with the reflecting parasitic branch on the side facing the rear shell, or the bottom radiating unit is provided with the guiding parasitic branch on the side facing the display screen and the reflecting parasitic branch on the side facing the rear shell.

[0014] When a person holds an electronic device, the upper palm and the lower palm are the main influencing factors, and have the greatest impact on the bottom radiating unit located at the bottom of the electronic device. If the influence of these two parts of the hand model on the bottom radiating unit can be eliminated or weakened, the antenna efficiency in the hand model scenario can be significantly improved. Through the above setting, the antenna's radiation pattern can be directed towards the display screen as much as possible, and the radiation pattern of the antenna toward the back shell is weaker. This can reduce the hand model drop and improve the antenna performance, especially the antenna performance in the user's actual usage scenario.

[0015] In a possible implementation, the directing parasitic branch is located on a surface of the display screen facing the middle frame, and the directing parasitic branch is located within a projection area of ​​the bottom radiation unit on the display screen.

[0016] In a possible implementation, the bottom radiation unit is a metal radiator formed by disconnecting two slits of a bottom metal frame of the electronic device.

[0017] In a possible implementation, the parasitic branch includes: at least one guiding parasitic branch; the at least one guiding parasitic branch is located on a side of the radiating unit facing the rear shell, and the guiding parasitic branch is used to guide the electromagnetic waves radiated by the radiating unit toward the rear shell;

[0018] Alternatively, the parasitic branch includes: at least one reflective parasitic branch, the at least one reflective parasitic branch being located on a side of the radiation unit facing the display screen, and the reflective parasitic branch being configured to reflect the electromagnetic waves radiated by the radiation unit in a direction toward the rear housing;

[0019] Alternatively, the parasitic branch includes: at least one directing parasitic branch and at least one reflecting parasitic branch; the at least one directing parasitic branch is located on the side of the radiating unit facing the rear shell, and the directing parasitic branch is used to direct the radiated electromagnetic waves of the radiating unit in the direction toward the rear shell; the at least one reflecting parasitic branch is located on the side of the radiating unit facing the display screen, and the reflecting parasitic branch is used to reflect the radiated electromagnetic waves of the radiating unit in the direction toward the rear shell.

[0020] By providing at least one directing parasitic branch on the side of the radiating unit facing the rear housing, the radiated electromagnetic waves of the radiating unit can be directed toward the rear housing. By providing at least one reflecting parasitic branch on the side of the radiating unit facing the display screen, the radiated electromagnetic waves of the radiating unit can be directed away from the display screen (i.e., toward the rear housing), thereby preventing a human head from approaching the rear housing of the electronic device and causing adverse effects on the antenna performance of the electronic device. By providing at least one directing parasitic branch on the side of the radiating unit facing the rear housing and at least one reflecting parasitic branch on the side of the radiating unit facing the display screen, the radiated electromagnetic waves of the radiating unit can be further directed toward the rear housing, thereby preventing a human head from approaching the rear housing of the electronic device and causing adverse effects on the antenna performance of the electronic device to a greater extent.

[0021] In one possible implementation, the at least one radiating unit includes: a top radiating unit; the reflective parasitic branch is provided on the side of the top radiating unit facing the display screen; or, the guiding parasitic branch is provided on the side of the top radiating unit facing the rear shell; or, the reflective parasitic branch is provided on the side of the top radiating unit facing the display screen, and the guiding parasitic branch is provided on the side of the top radiating unit facing the rear shell.

[0022] When the human head is close to an electronic device, the impact on the top radiating unit located on the top of the electronic device is the greatest. If the impact on the top radiating unit can be eliminated or weakened, the antenna efficiency in the head form scenario can be significantly improved. Through the above setting, the antenna's radiation pattern can be directed as much as possible toward the rear shell, and the radiation pattern of the antenna toward the display screen is weaker. This can reduce the head form drop and improve the antenna performance, especially the antenna performance in the user's actual usage scenario.

[0023] In a possible implementation, the top radiation unit is a metal radiator formed by disconnecting two slits of a top metal frame of the electronic device.

[0024] In a possible implementation, the distance between the parasitic branch and the radiation unit is less than 1 / 4 wavelength corresponding to the resonant frequency of the radiation unit.

[0025] In a possible implementation, the length of the directed parasitic branch is less than half the wavelength corresponding to the resonant frequency of the radiation unit.

[0026] In a possible implementation, the length of the reflective parasitic branch is greater than half the wavelength corresponding to the resonant frequency of the radiation unit.

[0027] The second aspect of an embodiment of the present application also provides an electronic device, which includes at least: a display screen, a back cover, and a middle frame located between the display screen and the back cover, and also includes: any of the antenna devices described above; the middle frame is a metal middle frame, and the metal middle frame at least includes a metal frame, and the metal frame forms at least one metal radiator in the antenna device; the metal radiator serves as the radiation unit.

[0028] An electronic device provided in an embodiment of the present application includes at least an antenna device. The antenna device is configured by setting at least one parasitic branch between a radiating unit and a display screen or between a radiating unit and a back shell. The parasitic branch is used to change the radiation pattern characteristics of the radiating unit so that the radiated electromagnetic waves of the radiating unit are directed toward the display screen or the back shell. In this way, when a human hand or head approaches the back shell or the display screen of the electronic device, the adverse effects of human body parts on the antenna performance are reduced, thereby improving the user's actual experience.

[0029] The third aspect of the embodiments of the present application also provides an electronic device assembly, including: an electronic device and a protective cover located on the outside of the electronic device; the electronic device includes at least: a display screen, a back cover, an antenna device and a middle frame located between the display screen and the back cover; the antenna device includes: at least one radiation unit and at least one parasitic branch, the parasitic branch is used to change the radiation pattern characteristics of the radiation unit; the parasitic branch is located on the protective cover.

[0030] The electronic device assembly provided in the embodiment of the present application is capable of directing the radiated electromagnetic waves of the radiating unit toward the display screen or the back cover by providing a parasitic branch on the protective cover for changing the radiation pattern characteristics of the radiating unit. In this way, when a person's hand or head is close to the back cover or the display screen of the electronic device, the adverse effects of the human body parts on the antenna performance are reduced, thereby improving the user's actual experience.

[0031] In one possible implementation, the protective cover includes at least: a main body and a wrapping portion connected to the main body; the main body is in contact with the back shell, the wrapping portion is arranged around at least part of the metal frame of the electronic device, and the wrapping portion covers the joint between at least part of the metal frame and the display screen and the joint between the metal frame and the back shell; the parasitic branch is provided on the side of the wrapping portion close to the back shell; or, the parasitic branch is provided on the side of the wrapping portion close to the display screen; or, the parasitic branch is provided on both the side of the wrapping portion close to the back shell and the side of the wrapping portion close to the display screen.

[0032] In one possible implementation, the parasitic branch includes: at least one guiding parasitic branch; the at least one guiding parasitic branch is located on a side of the wrapping portion close to the display screen, and the guiding parasitic branch is used to guide the electromagnetic waves radiated by the radiating unit toward the display screen;

[0033] Alternatively, the parasitic branch includes: at least one reflective parasitic branch, the at least one reflective parasitic branch being located on a side of the wrapping portion close to the rear housing, and the reflective parasitic branch being configured to reflect the electromagnetic waves radiated by the radiating unit in a direction toward the display screen;

[0034] The parasitic branch includes: at least one guiding parasitic branch and at least one reflecting parasitic branch; the at least one guiding parasitic branch is located on the side of the wrapping portion close to the display screen, and the guiding parasitic branch is used to guide the radiated electromagnetic waves of the radiating unit in the direction toward the display screen; the at least one reflecting parasitic branch is located on the side of the wrapping portion close to the rear shell, and the reflecting parasitic branch is used to reflect the radiated electromagnetic waves of the radiating unit in the direction toward the display screen.

[0035] By providing at least one directing parasitic branch on the side of the wrapping portion facing the display screen, the electromagnetic waves radiated by the radiating unit can be directed toward the display screen. By providing at least one reflecting parasitic branch on the side of the wrapping portion facing the rear shell, the electromagnetic waves radiated by the radiating unit can be directed away from the rear shell (i.e., toward the display screen), thereby preventing a human hand from approaching the rear shell of the electronic device from adversely affecting the antenna performance of the electronic device. By providing at least one directing parasitic branch on the side of the wrapping portion facing the display screen and at least one reflecting parasitic branch on the side of the wrapping portion facing the rear shell, the electromagnetic waves radiated by the radiating unit can be further directed toward the display screen, thereby further preventing a human hand from approaching the rear shell of the electronic device from adversely affecting the antenna performance of the electronic device.

[0036] In one possible implementation, the parasitic branch includes: at least one guiding parasitic branch; the at least one guiding parasitic branch is located on a side of the wrapping portion close to the rear shell, and the guiding parasitic branch is used to guide the electromagnetic waves radiated by the radiating unit in a direction toward the rear shell;

[0037] Alternatively, the parasitic branch includes: at least one reflective parasitic branch, the at least one reflective parasitic branch being located on a side of the wrapping portion close to the display screen, and the reflective parasitic branch being configured to reflect the electromagnetic waves radiated by the radiating unit in a direction toward the rear housing;

[0038] The parasitic branch includes: at least one guiding parasitic branch and at least one reflecting parasitic branch; the at least one guiding parasitic branch is located on the side of the wrapping portion close to the rear shell, and the guiding parasitic branch is used to guide the radiated electromagnetic waves of the radiating unit in the direction toward the rear shell; the at least one reflecting parasitic branch is located on the side of the wrapping portion close to the display screen, and the reflecting parasitic branch is used to reflect the radiated electromagnetic waves of the radiating unit in the direction toward the rear shell.

[0039] By providing at least one directing parasitic branch on the side of the wrapping portion facing the rear shell, the electromagnetic waves radiated by the radiating unit can be directed toward the rear shell. By providing at least one reflecting parasitic branch on the side of the wrapping portion facing the display screen, the electromagnetic waves radiated by the radiating unit can be directed away from the display screen (i.e., toward the rear shell), thereby preventing adverse effects on the antenna performance of the electronic device when a person's head approaches the rear shell of the electronic device. By providing at least one directing parasitic branch on the side of the wrapping portion facing the rear shell and at least one reflecting parasitic branch on the side of the wrapping portion facing the display screen, the electromagnetic waves radiated by the radiating unit can be further directed toward the rear shell, thereby preventing adverse effects on the antenna performance of the electronic device when a person's head approaches the rear shell of the electronic device to a greater extent.

[0040] In a possible implementation, the middle frame is a metal middle frame, and the metal middle frame includes at least a metal frame, and the metal frame forms at least one metal radiator in the antenna device; and the metal radiator serves as the radiation unit.

[0041] In a possible implementation, the distance between the parasitic branch and the radiation unit is less than 1 / 4 wavelength corresponding to the resonant frequency of the radiation unit.

[0042] In a possible implementation, the length of the directed parasitic branch is less than half the wavelength corresponding to the resonant frequency of the radiation unit.

[0043] In a possible implementation, the length of the reflective parasitic branch is greater than half the wavelength corresponding to the resonant frequency of the radiation unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A schematic diagram of the overall structure of an electronic device provided in one embodiment of the present application;

[0045] Figure 2 A schematic diagram of the disassembled structure of an electronic device provided in one embodiment of the present application;

[0046] Figure 3 A schematic structural diagram of a metal frame of an electronic device provided in one embodiment of the present application;

[0047] Figure 4 The figure is a radiation performance diagram of an antenna device in an electronic device in the prior art in free space;

[0048] Figure 5 A diagram showing a simulated scene of an electronic device provided in an embodiment of the present application removing the upper palm in a hand-held scenario;

[0049] Figure 6 A diagram showing a simulated scene of an electronic device being dropped from a hand while being held in a hand according to an embodiment of the present application;

[0050] Figure 7 A diagram showing a simulated scene of an electronic device provided in an embodiment of the present application removing the right palm from a hand-held scene;

[0051] Figure 8 A diagram showing a simulated scene of an electronic device provided in an embodiment of the present application removing the left palm from a hand-held scene;

[0052] Figure 9 A comparison diagram of the simulated efficiency of the antenna device of the electronic device provided by one embodiment of the present application after removing the palms of different areas in a hand-held scenario;

[0053] Figure 10 A schematic structural diagram of an antenna device in an electronic device according to an embodiment of the present application;

[0054] Figure 11 A schematic structural diagram of an antenna device in an electronic device according to an embodiment of the present application;

[0055] Figure 12 for Figure 11 A-A' cross-sectional structural diagram;

[0056] Figure 13 A comparison curve of radiation performance of directed parasitic stubs and reflected parasitic stubs in an antenna device in an electronic device provided in an embodiment of the present application;

[0057] Figure 14 A schematic structural diagram of an antenna device in an electronic device according to an embodiment of the present application;

[0058] Figure 15 A schematic structural diagram of an antenna device in an electronic device according to an embodiment of the present application;

[0059] Figure 16 A schematic structural diagram of an antenna device in an electronic device according to an embodiment of the present application;

[0060] Figure 17 A graph showing the radiation performance of an antenna device in an electronic device in free space according to an embodiment of the present application;

[0061] Figure 18 The radiation pattern of the antenna device of the electronic device provided in one embodiment of the present application in free space at 2.25 GHz;

[0062] Figure 19 The radiation pattern of the antenna device at 2.25 GHz in the scenario where the electronic device provided by one embodiment of the present application is held in the left hand close to the left ear;

[0063] Figure 20 The radiation pattern of the antenna device of the electronic device provided in one embodiment of the present application in free space at 2.52 GHz;

[0064] Figure 21 This is the radiation pattern of the antenna device at 2.52 GHz when the electronic device provided by one embodiment of the present application is held in the right hand close to the right ear;

[0065] Figure 22 A comparative curve chart of the radiation performance of the antenna device of the electronic device provided by one embodiment of the present application in free space, when held in the left hand close to the left ear, and when held in the right hand close to the right ear;

[0066] Figure 23 A comparative curve chart of the radiation performance of the antenna device of the electronic device provided by one embodiment of the present application in free space, in the left-handed usage scenario, and in the left-handed usage scenario close to the left ear;

[0067] Figure 24 A schematic structural diagram of an electronic device assembly provided in one embodiment of the present application;

[0068] Figure 25 for Figure 24 Schematic diagram of the BB' cross-section structure.

[0069] Description of reference numerals:

[0070] 100 - antenna assembly; 10 - radiating element; a, b, c, d, e, f, g, h - slots;

[0071] 1011-top radiating unit; 1012-bottom radiating unit; 1013-left radiating unit;

[0072] 1014-right radiating unit; 20-parasitic branch; 201-leading to the parasitic branch;

[0073] 202-reflective parasitic branch; 301-upper palm covering area; 302-lower palm covering area;

[0074] 303-right palm coverage area; 304-left palm coverage area; 200-mobile phone;

[0075] 21-display screen; 211-opening; 22-middle frame;

[0076] 221-Metal middle plate; 222-Frame; 2221-Top frame;

[0077] 2222-bottom border; 2223-left border; 2224-right border;

[0078] 23-circuit board; 24-battery; 25-back cover;

[0079] 300-protective cover; 3001-main body; 3002-wrapping part. DETAILED DESCRIPTION

[0080] The terms used in the implementation section of this application are only used to explain the specific embodiments of this application and are not intended to limit this application. The implementation of the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0081] The embodiments of the present application provide an electronic device, which may include but is not limited to a mobile phone, a tablet computer, a laptop computer, an ultra-mobile personal computer (UMPC), a handheld computer, a walkie-talkie, a netbook, a point of sales (POS) machine, a personal digital assistant (PDA), a wearable device, a virtual reality device, a wireless USB flash drive, a Bluetooth speaker / headphone, or a mobile or fixed terminal with an antenna, such as a vehicle-mounted front-end device, a driving recorder, and a security device.

[0082] Among them, in the embodiment of the present application, the mobile phone 200 is taken as an example of the above-mentioned electronic device for description. The mobile phone 200 provided in the embodiment of the present application can be a curved screen mobile phone or a flat screen mobile phone. In the embodiment of the present application, the flat screen mobile phone is taken as an example for description. Figure 1 and Figure 2 The overall structure and split structure of the mobile phone 200 are shown respectively. The display screen 21 of the mobile phone 200 provided in the embodiment of the present application can be a water drop screen, a notch screen, a full screen or a hole screen (see Figure 1 As shown), for example, a hole 211 is provided on the display screen 21, and the following description is made using the hole-punch screen as an example.

[0083] See also Figure 2 As shown, the mobile phone 200 may include: a display screen 21, a middle frame 22, a rear shell 25, and a battery 24 located between the middle frame 22 and the rear shell 25, wherein the battery 24 may be located on a side of the middle frame 22 facing the rear shell 25 (e.g., Figure 2 As shown), or the battery 24 can be arranged on the side of the middle frame 22 facing the display screen 21, for example, the side of the middle frame 22 facing the rear shell 25 can have a battery compartment (not shown in the figure), and the battery 24 is installed in the battery compartment. In some other examples, the mobile phone 200 can also include a circuit board 23, wherein the circuit board 23 can be arranged on the middle frame 22, for example, the circuit board 23 can be arranged on the side of the middle frame 22 facing the rear shell 25 (as shown in the figure). Figure 2 As shown), or the circuit board 23 can be set on the side of the middle frame 22 facing the display screen 21, and the display screen 21 and the rear shell 25 are respectively located on both sides of the middle frame 22.

[0084] The battery 24 can be connected to the charging management module and the circuit board 23 through a power management module. The power management module receives input from the battery 24 and / or the charging management module and provides power to the processor, internal memory, external memory, display screen 21, camera module, and communication module. The power management module can also be used to monitor parameters such as the capacity of the battery 24, the number of cycles of the battery 24, and the health status of the battery 24 (leakage, impedance). In some other embodiments, the power management module can also be set in the processor of the circuit board 23. In other embodiments, the power management module and the charging management module can also be set in the same device.

[0085] When the mobile phone 200 is a flat screen mobile phone, the display screen 21 can be an organic light-emitting diode (OLED) display screen or a liquid crystal display (LCD) display screen. When the mobile phone 200 is a curved screen mobile phone, the display screen 21 can be an OLED display screen.

[0086] Continue to refer to Figure 2 The middle frame 22 may include a metal middle plate 221 and a frame 222, with the frame 222 being arranged around the outer periphery of the metal middle plate 221. Generally, the frame 222 may include a top frame 2221, a bottom frame 2222, a left frame 2223, and a right frame 2224, with the top frame 2221, the bottom frame 2222, the left frame 2223, and the right frame 2224 forming a square ring structure of the frame 222. The material of the metal middle plate 221 includes, but is not limited to, aluminum plate, aluminum alloy, stainless steel, steel-aluminum composite die-cast plate, titanium alloy, or magnesium alloy. The frame 222 may be a metal frame, a ceramic frame, or a glass frame. When the frame 222 is a metal frame, the material of the metal frame may include, but is not limited to, aluminum alloy, stainless steel, steel-aluminum composite die-cast plate, or titanium alloy. The metal middle plate 221 and the frame 222 may be snap-fitted, welded, bonded, or integrally formed, or the metal middle plate 221 and the frame 222 may be fixedly connected by injection molding.

[0087] Reference Figure 2 As shown, the top frame 2221 and the bottom frame 2222 are arranged opposite each other, and the left frame 2223 and the right frame 2224 are arranged opposite each other. The top frame 2221 is connected to one end of the left frame 2223 and one end of the right frame 2224 with rounded corners, and the bottom frame 2222 is connected to the other end of the left frame 2223 and the other end of the right frame 2224 with rounded corners, thereby forming a rounded rectangular area. The back shell ground plane is arranged in the rounded rectangular area and is connected to the top frame 2221, the bottom frame 2222, the left frame 2223, and the right frame 2224. It is understood that the back shell ground plane can be the back shell 25 of the mobile phone 200.

[0088] The back cover 25 may be a metal back cover, a glass back cover, a plastic back cover, or a ceramic back cover. In the embodiment of the present application, the material of the back cover 25 is not limited and is not limited to the above examples.

[0089] It should be noted that, in some examples, the back shell 25 of the mobile phone 200 can be connected to the frame 222 to form an integrally molded (Unibody) back shell. For example, the mobile phone 200 may include: a display screen 21, a metal middle plate 221 and a back shell. The back shell can be a back shell formed by integrally molding (Unibody) the frame 222 and the back shell 25, so that the circuit board 23 and the battery 24 are located in the space surrounded by the metal middle plate 221 and the back shell.

[0090] It should be understood that the structures illustrated in the embodiments of the present application do not constitute a specific limitation on the mobile phone 200. In other embodiments of the present application, the mobile phone 200 may include more or fewer components than shown, or may combine or separate certain components, or arrange the components differently. The components shown in the illustrations may be implemented in hardware, software, or a combination of software and hardware.

[0091] In order to realize the communication function of the mobile phone 200, an antenna can be provided on the mobile phone 200 to transmit and receive signals. At present, most mobile phones 200 use an industrial design (ID) of a metal frame and a glass back cover. Due to the limited size of the metal frame and the tight antenna environment, antennas in certain frequency bands can only excite a single mode of the metal frame to minimize the size. Therefore, the performance of antennas designed with a metal frame is greatly affected by the body parts. Since the human body parts are dielectrics, when the head and hands and other parts of the human body are close to the antenna, the dielectric will affect the performance of the antenna, thereby causing a certain degree of reduction and deterioration in the performance of the product antenna, which directly affects the actual user experience. Therefore, the wireless performance level of the mobile phone 200 in actual usage scenarios is directly related to the actual user experience.

[0092] Common usage scenarios generally include besides head and hand (BHH), besides head (BH), and hand (H). Tables 1 to 3 below show the antenna system efficiency of the lower antenna B1 band of a mobile phone 200 in the head and hand, head, and hand scenarios, as well as the efficiency reduction level compared to free space (FS).

[0093] Table 1: Efficiency values ​​and efficiency reduction of the head-hand model scene relative to free space

[0094]

[0095]

[0096] Table 2: Efficiency values ​​and efficiency reduction of the hand model scene relative to free space

[0097]

[0098] Table 3: Efficiency values ​​and efficiency reduction of head model scenes relative to free space

[0099]

[0100] Combining the above tables clearly shows that the head has a smaller impact on antenna efficiency, while the hand has a greater impact. The hand's impact directly determines the antenna's performance in both head-hand and hand-manipulation scenarios. Therefore, minimizing the impact of the hand-manipulation on antenna performance is a key issue facing antennas.

[0101] Taking the lower antenna at the bottom of a mobile phone as an example, by studying the impact of hand models on the performance degradation of the lower antenna, it was found that different areas of the human hand have a significant impact on the performance degradation of the antenna. Figure 4 As shown, the radiation pattern of the lower antenna is relatively balanced toward the front screen (i.e., display screen 21) and the rear cover 25. However, in actual use scenarios, a person holds the rear cover 25 of the mobile phone 200, and the radiation pattern of the rear cover 25 is greatly affected by the hand shape.

[0102] Therefore, through the study of the influence of the hand model on the antenna amplitude reduction, it can be known that if the hand model amplitude reduction is to be reduced, the antenna radiation pattern needs to be adjusted, and the antenna radiation pattern should avoid the influence of the hand model. That is to say, the antenna radiation pattern should be as close to the display screen 21 as possible, and the radiation pattern toward the back shell 25 should be as weak as possible. In this way, the hand model amplitude reduction can be reduced and the antenna performance can be improved, especially the antenna performance in the actual user usage scenario.

[0103] In addition, through experimental tests, such as Figure 5-Figure 8 As shown, different areas of the hand model can be cut out to verify the difference in the impact of different areas of the hand on the performance degradation of the antenna. Figure 5 In the hand model scene, the simulated scene diagram is to remove the upper palm covering area 301. Figure 6 In the hand model scene, the simulated scene diagram is to remove the lower palm covering area 302. Figure 7 In order to remove the palm right covering area 303 in the hand model scene, Figure 8 In order to remove the left palm covering area 304 in the hand model scene, the simulation scene diagram is Figure 5-Figure 8 The hand model with different cutting areas shown in the figure is simulated, and the results are as follows Figure 9 shown.

[0104] Figure 9 In the figure, S1 is the corresponding radiation curve of the antenna when no area is removed in the hand model scene, and S2 is the corresponding radiation curve of the antenna when the upper palm coverage area 301 (i.e. Figure 5 S3 is the radiation curve corresponding to the scene where the antenna removes the lower palm coverage area 302 (i.e. Figure 6 S4 is the radiation curve corresponding to the scene where the antenna removes the right palm coverage area 303 (i.e. Figure 7S5 is the radiation curve corresponding to the scene where the antenna removes the left palm coverage area 304 (i.e. Figure 8 From the radiation curve diagram corresponding to the scene) in Figure 3, it can be seen that the upper and lower areas of the palm are the main factors affecting the antenna radiation performance. If the influence of these two parts of the hand model can be eliminated or weakened, the antenna efficiency in the hand model scene can be significantly improved.

[0105] Based on the above description, an embodiment of the present application provides an antenna device, which can be used in an electronic device (such as a mobile phone 200). The antenna device is configured by setting at least one parasitic branch between the radiation unit and the display screen or between the radiation unit and the back shell. The parasitic branch is used to change the radiation pattern characteristics of the radiation unit so that the radiation pattern of the radiation unit is directed toward the display screen. In this way, when a human hand approaches the back shell of the electronic device, the adverse effects of the human body on the antenna performance are reduced, thereby improving the user's actual experience.

[0106] It should be noted that the antenna device provided in this application is suitable for electronic devices that adopt any one or more of the following communication technologies, such as long-term evolution (LTE) communication technology, Wi-Fi communication technology, 5G communication technology, SUB-6G communication technology, and other future MIMO communication technologies.

[0107] The specific structure of the antenna device is described below with reference to specific drawings (the following embodiments do not emphasize the requirements of the communication network, but only illustrate the working characteristics of the antenna device in terms of frequency).

[0108] The embodiment of the present application provides an antenna device 100, which is applied to a mobile phone 200. The mobile phone 200 may include a display screen 21, a rear cover 25, and a middle frame 22 located between the display screen 21 and the rear cover 25 (see FIG. Figure 2 ), where reference is made to Figure 10 and Figure 11 As shown, the antenna device 100 may include: at least one radiation element 10 and at least one parasitic branch 20 (eg, a directing parasitic branch 201 and a reflecting parasitic branch 202 ), wherein the parasitic branch 20 is used to change the radiation pattern characteristics of the radiation element 10 .

[0109] The parasitic branch 20 is located on the side of the radiating unit 10 facing the display screen 21, or the parasitic branch 20 is located on the side of the radiating unit 10 facing the back cover 25. By providing 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 back cover 25, the parasitic branch 20 is used to change the radiation pattern characteristics of the radiating unit 10 so that the electromagnetic waves radiated by the radiating unit 10 are directed toward the display screen 21 or the back cover 25. In this way, when a person's hand or head is close to the back cover 25 or the display screen 21 of the mobile phone 200, the adverse effects of the human body on the antenna performance are reduced, thereby improving the actual user experience.

[0110] It should be noted that, in the examples of this application, see Figure 12 As shown, the distance L2 between the parasitic branch 20 and the radiation unit 10 may be less than 1 / 4 wavelength corresponding to the resonant frequency of the radiation unit 10. In addition, the shape of the parasitic branch 20 may be linear or curved, which is not limited in this embodiment of the present application.

[0111] in addition, Figure 13 In FIG. 1 , S1 is a radiation efficiency curve corresponding to the case of adopting the parasitic branch 201, and S2 is a radiation efficiency curve corresponding to the case of adopting the parasitic branch 202. Figure 13 As shown, for the radiation unit 10 operating at 2.2 GHz to 2.6 GHz, after adding different parasitic branches 20 , the efficiency corresponding to the parasitic branch 201 is before 2.2 GHz to 2.6 GHz, while the efficiency corresponding to the reflective parasitic branch 202 is after 2.2 GHz to 2.6 GHz.

[0112] In the hand model scenario, that is, a scenario where a person holds a mobile phone (the hand is close to the back cover 25 of the mobile phone), the structure and configuration of the parasitic branch 20 include but are not limited to the following possible implementations:

[0113] One possible implementation is: Figure 14 As shown, the parasitic branch 20 may include: at least one directing parasitic branch 201, at least one directing parasitic branch 201 is located on the side of the radiating unit 10 facing the display screen 21, and the directing parasitic branch 201 is used to direct the electromagnetic waves radiated by the radiating unit 10 toward the display screen 21. The directing parasitic branch 201 may be a director. By providing at least one directing parasitic branch 201 on the side of the radiating unit 10 facing the display screen 21, the electromagnetic waves radiated by the radiating unit 10 can be directed toward the display screen 21, thereby preventing the antenna performance of the mobile phone 200 from being adversely affected when a human hand approaches the back cover 25 of the mobile phone 200.

[0114] Another possible implementation is: Figure 15As shown, the parasitic branch 20 may include: at least one reflective parasitic branch 202, at least one reflective parasitic branch 202 is located on the side of the radiating unit 10 facing the rear housing 25, and the reflective parasitic branch 202 is used to reflect the electromagnetic waves radiated by the radiating unit 10 in the direction toward the display screen 21. The reflective parasitic branch 202 may be a reflector. By providing at least one reflective parasitic branch 202 on the side of the radiating unit 10 facing the rear housing 25, the electromagnetic waves radiated by the radiating unit 10 can be directed away from the rear housing 25 (i.e., toward the display screen 21), thereby preventing a human hand from adversely affecting the antenna performance of the mobile phone 200 when the rear housing 25 of the mobile phone 200 is approached.

[0115] Another possible implementation is: Figure 16 As shown, the parasitic branch 20 may include: at least one directing parasitic branch 201 and at least one reflecting parasitic branch 202. The at least one directing parasitic branch 201 is located on the side of the radiating unit 10 facing the display screen 21, and is used to direct the electromagnetic waves radiated by the radiating unit 10 toward the display screen 21. The at least one reflecting parasitic branch 202 is located on the side of the radiating unit 10 facing the back cover 25, and is used to reflect the electromagnetic waves radiated by the radiating unit 10 toward the display screen 21. By providing at least one directing parasitic branch 201 on the side of the radiating unit 10 facing the display screen 21 and at least one reflecting parasitic branch 202 on the side of the radiating unit 10 facing the back cover 25, the electromagnetic waves radiated by the radiating unit 10 can be further directed toward the display screen 21, thereby greatly preventing adverse effects on the antenna performance of the mobile phone 200 when a human hand approaches the back cover 25 of the mobile phone 200.

[0116] Reference Figure 3 As shown, at least one radiation unit 10 may include: a bottom radiation unit 1012. In an embodiment of the present application, the bottom radiation unit 1012 is provided with a guide to a parasitic branch 201 on the side facing the display screen 21, or the bottom radiation unit 1012 is provided with a reflective parasitic branch 202 on the side facing the rear shell 25, or the bottom radiation unit 1012 is provided with a guide to a parasitic branch 201 on the side facing the display screen 21, and the bottom radiation unit 1012 is provided with a reflective parasitic branch 202 on the side facing the rear shell 25.

[0117] When a person holds an electronic device, the upper palm and the lower palm are the main influencing factors, and have the greatest impact on the bottom radiating unit located at the bottom of the electronic device. If the influence of these two parts of the hand model on the bottom radiating unit can be eliminated or weakened, the antenna efficiency in the hand model scenario can be significantly improved. Through the above setting, the antenna's radiation pattern can be directed towards the display screen as much as possible, and the radiation pattern of the antenna toward the back shell is weaker. This can reduce the hand model drop and improve the antenna performance, especially the antenna performance in the user's actual usage scenario.

[0118] For example, the parasitic branch 201 can be located on a side of the display screen 21 facing the middle frame 22, and the parasitic branch 201 can be located within the projection area of ​​the bottom radiating unit 1012 on the display screen 21, so that the electromagnetic waves radiated by the bottom radiating unit 1012 are directed toward the display screen 21. The embodiments of the present application do not limit the specific fixed position of the parasitic branch 20, nor are they limited to the above examples.

[0119] In the head model scenario, that is, when the human head is close to the mobile phone (in this case, the head is close to the display screen 21 of the mobile phone), the structure and configuration of the parasitic branch 20 include but are not limited to the following possible implementations:

[0120] In one possible implementation, the parasitic branch 20 may include at least one directing parasitic branch 201, located on a side of the radiating unit 10 facing the rear housing 25, and configured to direct the electromagnetic waves radiated by the radiating unit 10 toward the rear housing 25. By providing at least one directing parasitic branch on the side of the radiating unit facing the rear housing, the electromagnetic waves radiated by the radiating unit can be directed toward the rear housing, thereby preventing adverse effects on the antenna performance of the electronic device when a person's head is close to the rear housing of the electronic device.

[0121] Another possible implementation is that the parasitic branch 20 may include: at least one reflective parasitic branch 202, at least one reflective parasitic branch 202 is located on the side of the radiating unit 10 facing the display screen 21, and the reflective parasitic branch 202 is used to reflect the electromagnetic waves radiated by the radiating unit 10 in the direction toward the back cover 25. By providing at least one reflective parasitic branch on the side of the radiating unit facing the display screen, the electromagnetic waves radiated by the radiating unit can be directed away from the display screen (i.e., toward the back cover), thereby preventing the antenna performance of the electronic device from being adversely affected when the human head is close to the back cover of the electronic device.

[0122] In another possible implementation, the parasitic branch 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 the side of the radiating unit 10 facing the rear housing 25, and is used to direct the electromagnetic waves radiated by the radiating unit 10 toward the rear housing 25. The at least one reflecting parasitic branch 202 is located on the side of the radiating unit 10 facing the display screen 21, and is used to reflect the electromagnetic waves radiated by the radiating unit 10 toward the rear housing 25. By providing at least one directing parasitic branch on the side of the radiating unit facing the rear housing and at least one reflecting parasitic branch on the side of the radiating unit facing the display screen, the electromagnetic waves radiated by the radiating unit can be further directed toward the rear housing, thereby further preventing adverse effects on the antenna performance of the electronic device when a person's head is close to the rear housing of the electronic device.

[0123] Reference Figure 3 As shown, at least one radiation unit 10 may include: a top radiation unit 1011. In an embodiment of the present application, a reflective parasitic branch 202 is provided on the side of the top radiation unit 1011 facing the display screen 21, or a directed parasitic branch 201 is provided on the side of the top radiation unit 1011 facing the rear shell 25, or a reflective parasitic branch 202 is provided on the side of the top radiation unit 1011 facing the display screen 21, and a directed parasitic branch 201 is provided on the side of the top radiation unit 1011 facing the rear shell 25.

[0124] When the human head is close to an electronic device, the impact on the top radiating unit located on the top of the electronic device is the greatest. If the impact on the top radiating unit can be eliminated or weakened, the antenna efficiency in the head form scenario can be significantly improved. Through the above setting, the antenna's radiation pattern can be directed as much as possible toward the rear shell, and the radiation pattern of the antenna toward the display screen is weaker. This can reduce the head form drop and improve the antenna performance, especially the antenna performance in the user's actual usage scenario.

[0125] It should be noted that in the embodiment of the present application, the length L1 of the parasitic branch 201 can be less than 1 / 2 wavelength corresponding to the resonant frequency of the radiation unit 10, and the length L1 of the reflected parasitic branch 202 can be greater than 1 / 2 wavelength corresponding to the resonant frequency of the radiation unit 10.

[0126] Furthermore, in some embodiments, the radiation unit 10 can be a metal radiator formed by breaking two seams of the metal frame of the mobile phone. Specifically, the middle frame 22 can be a metal middle frame, and the metal middle frame at least includes a metal frame, and the metal frame forms at least one metal radiator in the antenna device 100, and the metal radiator serves as the radiation unit 10. Figure 3As shown, the top radiation unit 1011 is a metal radiator formed by breaking two fractures (fracture a and fracture b) of the top metal frame of the mobile phone (i.e., the top frame 2221), and the bottom radiation unit 1012 is a metal radiator formed by breaking two fractures (fracture a and fracture b) of the bottom metal frame of the mobile phone (i.e., the bottom frame 2222).

[0127] Of course, in some other embodiments, at least one radiation unit 10 may also include a left radiation unit 1013 and a right radiation unit 1014, wherein the left radiation unit 1013 is a metal radiator formed by breaking two fractures (fracture e and fracture f) of the left metal frame of the mobile phone (i.e., the left frame 2223), and the right radiation unit 1014 is a metal radiator formed by breaking two fractures (fracture g and fracture h) of the right metal frame of the mobile phone (i.e., the right frame 2224).

[0128] Similarly, a parasitic branch 20 may be provided between the left radiating unit 1013 and the display screen 21, or between the left radiating unit 1013 and the back cover 25, or between the left radiating unit 1013 and the display screen 21 and between the left radiating unit 1013 and the back cover 25. A parasitic branch 20 may be provided between the right radiating unit 1014 and the display screen 21, or between the right radiating unit 1014 and the back cover 25, or between the right radiating unit 1014 and the display screen 21 and between the right radiating unit 1014 and the back cover 25.

[0129] The top radiating unit 1011, the bottom radiating unit 1012, the left radiating unit 1013, and the right radiating unit 1014 can be diversity antennas, Wi-Fi antennas, Bluetooth antennas, GPS antennas, main antennas, or medium- and high-frequency multiple-input multiple-output (MIMO) antennas. When the bottom radiating unit 1012 is the main antenna, the main antenna is located at the bottom of the mobile phone 200, thereby reducing the specific absorption rate (SAR) of the mobile phone 200.

[0130] Figure 17 The performance curve of the antenna device 100 provided in the embodiment of the present application in free space is given. Figure 17, A1 is a graph showing how the antenna reflection coefficient of the antenna device 100 in free space varies with frequency, A2 is a graph showing how the radiation efficiency of the antenna device 100 provided in an embodiment of the present application varies with frequency in free space, and A3 is a graph showing how the total efficiency of the antenna device 100 in free space varies with frequency in an embodiment of the present application.

[0131] in addition, Figure 18 、 Figure 19 、 Figure 20 and Figure 21 They are respectively the radiation patterns corresponding to the antenna device 100 provided in the embodiment of the present application in different working scenarios. As can be seen from the figure, the radiation performance diagram of the antenna device 100 provided in the embodiment of the present application is compared with the antenna device in the electronic device in the prior art in free space, that is, Figure 4 The directional pattern shown in FIG. 1 shows that the directional pattern characteristics have undergone a significant directional change, and the main radiation pattern is completely directed towards the direction of the display screen 21. Moreover, by comparing Figure 18 and Figure 19 and contrast Figure 20 and Figure 21 It can be seen that by adopting the antenna device 100 provided in the embodiment of the present application, the influence of the human body on the radiation pattern characteristics of the radiation unit 10 can be reduced.

[0132] In addition, after the head-hand performance of the three antenna devices 100 is evaluated in different simulation scenarios, namely, free space, right head-hand model and left head-hand model, as shown in FIG. Figure 22 As shown, A1 is the reflection coefficient curve corresponding to the antenna device 100 provided in the embodiment of the present application in free space, A2 is the radiation efficiency curve corresponding to the antenna device 100 provided in the embodiment of the present application in free space, B1 is the reflection coefficient curve corresponding to the antenna device 100 provided in the embodiment of the present application in the right hand model scenario, B2 is the radiation efficiency curve corresponding to the antenna device 100 provided in the embodiment of the present application in the right hand model scenario, C1 is the reflection coefficient curve corresponding to the antenna device 100 provided in the embodiment of the present application in the left hand model scenario, and C2 is the radiation efficiency curve corresponding to the antenna device 100 provided in the embodiment of the present application in the left hand model scenario. According to Figure 22 It can be seen that by adopting the antenna device 100 provided in the embodiment of the present application, the efficiency of the antenna in the left hand and the right hand is reduced by 3.7 dB and 3.3 dB respectively, which is significantly smaller than the data shown in Table 1. The antenna performance in the hand-held scenario is significantly improved.

[0133] Furthermore, after application evaluation of the antenna performance of the three antenna devices 100 in free space, left head hand model and left hand model scenarios, as shown in FIG. Figure 23As shown, A2 is a radiation efficiency curve corresponding to the antenna device 100 provided in the embodiment of the present application in free space, C2 is a radiation efficiency curve corresponding to the antenna device 100 provided in the embodiment of the present application in the left head hand model scene, and D2 is a radiation efficiency curve corresponding to the antenna device 100 provided in the embodiment of the present application in the left hand model scene. Figure 23 It can be seen that the efficiency reduction of the left head hand and the left hand of the antenna device 100 provided in the embodiment of the present application is compared with Table 1 and Figure 2 The data shown have all been significantly reduced, and the antenna performance in the handheld scenario has been significantly improved.

[0134] In addition, it should be noted that, in some embodiments, the radiating unit 10 may be disposed on the inner surface of the rear housing. Specifically, the radiating unit 10 may be a suspended metal, a graphene layer, or a transparent conductive layer. Of course, in other embodiments, the radiating unit 10 is not limited to being a suspended metal antenna, a graphene antenna, or a transparent antenna. For example, the radiating unit 10 disposed on the inner surface of the rear housing 25 may also be other antenna elements disposed on the inner surface of the rear housing 25 that can be coupled and radiate signals.

[0135] In this way, the feed network can be largely implemented by the radiation unit 10 provided on the inner surface of the battery cover, thereby reducing the layout area of ​​the antenna on the metal frame and reducing the impact on other antennas. In addition, the antenna device can be implemented within a limited design space, effectively saving antenna design space inside the electronic device to a certain extent. To a certain extent, the antenna device 100 can be implemented within a limited design space, effectively saving antenna design space inside the mobile phone 200. Moreover, the antenna device 100 does not require additional slots on the metal frame of the middle frame 22, will not affect the industrial design appearance of the mobile phone 200, and can effectively reduce the impact of handholding.

[0136] It should be noted that the radiation unit 10 can be printed or affixed to the inner surface of the rear housing 25, or the radiation unit 10 can also be embedded in the inner surface of the rear housing 25. The embodiment of the present application does not limit the specific arrangement of the radiation unit 10 on the inner surface of the rear housing 25, nor is it limited to the above example. Of course, in some other embodiments, the radiation unit 10 can also be arranged on the outer surface of the rear housing 25, and the embodiment of the present application is not limited to this.

[0137] It can be understood that, in some embodiments, the antenna device 100 provided in the embodiment of the present application may include multiple groups of radiation units 10 to add more radiators. By increasing the number of radiators, the antenna device 100 can achieve more modes of coverage.

[0138] In addition, the embodiment of the present application further provides an electronic device assembly, which may include: an electronic device and a protective cover 300 located outside the electronic device (see Figure 24 and Figure 25 As shown, taking a mobile phone 200 as an example, the electronic device may include at least: a display screen 21, a rear cover 25, an antenna device 100, and a middle frame 22 located between the display screen 21 and the rear cover 25. The antenna device 100 may include: at least one radiating element 10 and at least one parasitic branch 20, wherein the parasitic branch 20 is used to change the radiation pattern characteristics of the radiating element 10, and the parasitic branch 20 is located on the protective cover 300.

[0139] By providing a parasitic branch 20 on the protective cover 300 for changing the radiation pattern characteristics of the radiation unit, the electromagnetic waves radiated by the radiation unit 10 can be directed toward the display screen 21 or the back cover 25. In this way, when a person's hand or head is close to the back cover or display screen of the mobile phone 200, the adverse effects of the human body on the antenna performance are reduced, thereby improving the user's actual experience.

[0140] It should be noted that, in the embodiment of the present application, the distance between the parasitic branch 20 and the radiation unit 10 is less than 1 / 4 wavelength corresponding to the resonant frequency of the radiation unit 10 .

[0141] Continue to refer to Figure 24 and Figure 25 As shown, the protective case 300 may include at least: a main body 3001 and a wrapping portion 3002 connected to the main body 3001, wherein the main body 3001 is in contact with the back cover 25, and the wrapping portion 3002 is arranged around at least a portion of the metal frame of the mobile phone 200, and the wrapping portion 3002 covers at least a portion of the seam between the metal frame and the display screen 21, and the seam between the metal frame and the back cover 25. A parasitic branch 20 is provided on the side of the wrapping portion 3002 close to the back cover 25, or a parasitic branch 20 is provided on the side of the wrapping portion 3002 close to the display screen 21, or a parasitic branch 20 is provided on both the side of the wrapping portion 3002 close to the back cover 25 and the side of the wrapping portion 3002 close to the display screen 21.

[0142] Specifically, in the hand model scenario, that is, in the scenario where a person holds a mobile phone (the hand is close to the back cover 25 of the mobile phone), the structure and setting of the parasitic branch 20 include but are not limited to the following possible implementations:

[0143] In one possible implementation, the parasitic branch 20 may include at least one guiding parasitic branch 201, located on a side of the wrapping portion 3002 close to the display screen 21. The guiding parasitic branch 201 is used to direct the electromagnetic waves radiated by the radiating unit toward the display screen 21. By providing at least one guiding parasitic branch 201 on a side of the wrapping portion 3002 close to the display screen 21, the electromagnetic waves radiated by the radiating unit 10 can be directed toward the display screen 21, thereby preventing adverse effects on the antenna performance of the mobile phone 200 when a human hand approaches the rear cover 25 of the mobile phone 200.

[0144] Another possible implementation is that the parasitic branch 20 may include: at least one reflective parasitic branch 202, at least one reflective parasitic branch 202 is located on the side of the wrapping portion 3002 close to the rear housing 25, and the reflective parasitic branch 202 is used to reflect the electromagnetic waves radiated by the radiating unit in the direction toward the display screen 21. By providing at least one reflective parasitic branch 202 on the side of the wrapping portion 3002 close to the rear housing 25, the electromagnetic waves radiated by the radiating unit 10 can be directed away from the rear housing 25 (i.e., toward the display screen 21), thereby preventing a human hand from adversely affecting the antenna performance of the mobile phone 200 when the rear housing 25 of the mobile phone 200 is approached.

[0145] In another possible implementation, the parasitic branch 20 may include at least one directing parasitic branch 201 and at least one reflecting parasitic branch 202. The at least one directing parasitic branch 201 is located on a side of the wrapping portion 3002 close to the display screen 21, and is used to direct the electromagnetic waves radiated by the radiating unit toward the display screen 21. The at least one reflecting parasitic branch 202 is located on a side of the wrapping portion 3002 close to the back cover 25, and is used to reflect the electromagnetic waves radiated by the radiating unit toward the display screen 21. By providing at least one directing parasitic branch 201 on the side of the wrapping portion 3002 close to the display screen 21 and at least one reflecting parasitic branch 202 on the side of the wrapping portion 3002 close to the back cover 25, the electromagnetic waves radiated by the radiating unit 10 can be further directed toward the display screen 21, thereby further preventing adverse effects on the antenna performance of the mobile phone 200 when a human hand approaches the back cover 25 of the mobile phone 200.

[0146] In the head model scenario, that is, when the human head is close to the mobile phone (in this case, the head is close to the display screen 21 of the mobile phone), the structure and setting of the parasitic branch 2020 include but are not limited to the following possible implementations:

[0147] In one possible implementation, the parasitic branch 20 may include at least one guiding parasitic branch 201, wherein the at least one guiding parasitic branch 201 is located on a side of the wrapping portion 3002 close to the rear housing 25, and the guiding parasitic branch 201 is used to guide the electromagnetic waves radiated by the radiating unit toward the rear housing 25. By providing at least one guiding parasitic branch 201 on a side of the wrapping portion 3002 close to the rear housing 25, the electromagnetic waves radiated by the radiating unit can be directed toward the rear housing 25, thereby preventing adverse effects on the antenna performance of the mobile phone 200 when a person's head is close to the rear housing 25 of the mobile phone 200.

[0148] Another possible implementation is that the parasitic branch 20 may include: at least one reflective parasitic branch 202, at least one reflective parasitic branch 202 being located on a side of the wrapping portion 3002 close to the display screen 21, and the reflective parasitic branch 202 being used to reflect the electromagnetic waves radiated by the radiating unit toward the rear housing 25. By providing at least one reflective parasitic branch 202 on a side of the wrapping portion 3002 close to the display screen 21, the electromagnetic waves radiated by the radiating unit can be directed away from the display screen 21 (i.e., toward the rear housing 25), thereby preventing the adverse effects on the antenna performance of the mobile phone 200 when the human head is close to the rear housing 25 of the mobile phone 200.

[0149] In another possible implementation, the parasitic branch 20 may include at least one directing parasitic branch 201 and at least one reflecting parasitic branch 202. The at least one directing parasitic branch 201 is located on a side of the wrapping portion 3002 close to the rear housing 25, and is used to direct the electromagnetic waves radiated by the radiating unit toward the rear housing 25. The at least one reflecting parasitic branch 202 is located on a side of the wrapping portion 3002 close to the display screen 21, and is used to reflect the electromagnetic waves radiated by the radiating unit toward the rear housing 25. By providing at least one directing parasitic branch 201 on the side of the wrapping portion 3002 close to the rear housing 25 and at least one reflecting parasitic branch 202 on the side of the wrapping portion 3002 close to the display screen 21, the electromagnetic waves radiated by the radiating unit can be further directed toward the rear housing 25, thereby further minimizing adverse effects on the antenna performance of the mobile phone 200 when a person's head is close to the rear housing 25 of the mobile phone 200.

[0150] 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, the metal frame forms at least one metal radiator 101 in the antenna device, and the metal radiator 101 serves as the radiation unit 10 .

[0151] 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 radiation unit 10, and the length of the reflected parasitic branch 202 is greater than 1 / 2 wavelength corresponding to the resonant frequency of the radiation unit 10.

[0152] In addition, it should be noted that the electronic device provided in the embodiment of the present application can be a folding screen electronic device (such as a folding screen mobile phone). In this way, when the folding screen is in the closed state, the performance of the antenna hand model, head model or head-hand model in the closed state can also be improved by changing the radiation pattern.

[0153] In the description of the embodiments of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to a fixed connection, an indirect connection via an intermediate medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on specific circumstances.

[0154] In the embodiments of the present application, any device or element referred to or implied must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present application. In the description of the embodiments of the present application, the meaning of "plurality" is two or more, unless otherwise specifically specified.

[0155] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described here. In addition, the terms "may include" and "have" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0156] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the embodiments of the present application have been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An electronic device, characterized in that: Display, Back shell, a middle frame, the middle frame being located between the display screen and the rear housing, the middle frame comprising at least a bottom metal frame; An antenna device, comprising a bottom radiation unit with the bottom metal frame as a radiator and at least one parasitic branch, wherein the parasitic branch is spaced apart from the bottom metal frame in a thickness direction of the electronic device; The distance between the parasitic branch and the bottom metal frame in the thickness direction of the electronic device is less than 1 / 4 wavelength corresponding to the resonant frequency of the bottom radiation unit; The parasitic branch is used to direct the radiation pattern of the bottom radiation unit toward the display screen; The radiation unit of the antenna device is configured to operate in a first frequency band, the first frequency band being a frequency band from a first frequency to a second frequency, the first frequency being lower than the second frequency; The parasitic branches include guiding parasitic branches and reflecting parasitic branches, wherein the length of the guiding parasitic branches is less than 1 / 2 wavelength corresponding to the resonant frequency of the bottom radiating unit, and the resonant frequency generated by the guiding parasitic branches is higher than the second frequency; the length of the reflecting parasitic branches is greater than 1 / 2 wavelength corresponding to the resonant frequency of the bottom radiating unit, and the resonant frequency generated by the reflecting parasitic branches is lower than the first frequency; The guiding parasitic branch includes a first guiding parasitic branch, which is located on a side of the bottom radiating unit facing the display screen. In a hand model scenario, the first guiding parasitic branch is used to guide the radiation pattern of the bottom radiating unit in a direction toward the display screen and away from the direction of the human hand to reduce the influence of the human hand on the bottom radiating unit; The reflective parasitic branch includes a first reflective parasitic branch; The first reflective parasitic branch is located on the side of the bottom radiating unit facing the rear shell. In a hand model scenario, the first reflective parasitic branch reflects the radiation pattern of the bottom radiating unit in the direction toward the display screen, away from the direction of the human hand to reduce the impact of the human hand on the bottom radiating unit.

2. The electronic device according to claim 1, wherein The first directing parasitic branch is located on the display screen, and the first directing parasitic branch is located within a projection area of ​​the bottom radiation unit on the display screen.

3. The electronic device according to claim 1, wherein The first reflective parasitic branch is located on a surface of the rear shell facing the middle frame.

4. An electronic device, characterized in that: Display, Back shell, a middle frame, the middle frame being located between the display screen and the rear housing, the middle frame comprising at least a top metal frame; An antenna device, comprising a top radiating unit with the top metal frame as a radiator and at least one parasitic branch, wherein the parasitic branch is spaced apart from the top metal frame in a thickness direction of the electronic device; and a distance between the parasitic branch and the top metal frame in a thickness direction of the electronic device is less than 1 / 4 wavelength corresponding to the resonant frequency of the top radiation unit; The parasitic branch is used to direct the radiation pattern of the top radiation unit toward the rear shell; The radiation unit of the antenna device is configured to operate in a first frequency band, the first frequency band being a frequency band from a first frequency to a second frequency, the first frequency being lower than the second frequency; The parasitic branches include guiding parasitic branches and reflecting parasitic branches. The length of the guiding parasitic branches is less than 1 / 2 wavelength corresponding to the resonant frequency of the top radiating unit, and the resonant frequency of the guiding parasitic branches is higher than the second frequency; the length of the reflecting parasitic branches is greater than 1 / 2 wavelength corresponding to the resonant frequency of the top radiating unit, and the resonant frequency generated by the reflecting parasitic branches is lower than the first frequency.

5. The electronic device according to claim 4, characterized in that The guiding parasitic branch includes a second guiding parasitic branch, which is located on a side of the top radiating unit facing the rear shell, and is used to guide the radiation pattern of the top radiating unit toward the rear shell.

6. The electronic device according to claim 5, characterized in that The second guiding parasitic branch is located on a surface of the rear shell facing the top radiation unit, and the second guiding parasitic branch is located within a projection area of ​​the top radiation unit on the rear shell.

7. The electronic device according to claim 4, wherein: The reflective parasitic branch includes a second reflective parasitic branch, which is located on a side of the top radiating unit facing the display screen, and reflects the radiation pattern of the top radiating unit in a direction toward the rear shell.

8. The electronic device according to claim 7, wherein: The second reflective parasitic branch is located on the display screen.

9. An electronic device, characterized in that: Display, Back shell, a middle frame, the middle frame being located between the display screen and the rear housing, the middle frame comprising at least a bottom metal frame and a top metal frame; An antenna device, comprising a bottom radiating unit with the bottom metal frame as a radiator, a top radiating unit with the top metal frame as a radiator, at least one first parasitic branch, and at least one second parasitic branch; The first parasitic branch and the bottom metal frame are spaced apart in the thickness direction of the electronic device, and the distance between the first parasitic branch and the bottom metal frame in the thickness direction of the electronic device is less than 1 / 4 wavelength corresponding to the resonant frequency of the bottom radiation unit; The second parasitic branch and the top metal frame are spaced apart in the thickness direction of the electronic device, and the distance between the second parasitic branch and the top metal frame in the thickness direction of the electronic device is less than 1 / 4 wavelength corresponding to the resonant frequency of the top radiation unit; In a hand model scenario, the first parasitic branch is used to direct the radiation pattern of the bottom radiation unit toward the display screen and away from the human hand to reduce the influence of the human hand on the bottom radiation unit, and the second parasitic branch is used to direct the radiation pattern of the top radiation unit toward the back cover; The radiation unit of the antenna device is configured to operate in a first frequency band, the first frequency band being a frequency band from a first frequency to a second frequency, the first frequency being lower than the second frequency; The first parasitic branch includes a first directing parasitic branch and a first reflecting parasitic branch, wherein the length of the first directing parasitic branch is less than half the wavelength corresponding to the resonant frequency of the bottom radiating unit, and the resonant frequency generated by the first directing parasitic branch is higher than the second frequency; the length of the first reflecting parasitic branch is greater than half the wavelength corresponding to the resonant frequency of the bottom radiating unit, and the resonant frequency generated by the first reflecting parasitic branch is lower than the first frequency; The second parasitic branch includes a second guiding parasitic branch and a second reflecting parasitic branch, the length of the second guiding parasitic branch is less than 1 / 2 wavelength corresponding to the resonant frequency of the top radiating unit, and the resonant frequency generated by the second guiding parasitic branch is higher than the second frequency; the length of the second reflecting parasitic branch is greater than 1 / 2 wavelength corresponding to the resonant frequency of the top radiating unit, and the resonant frequency generated by the second reflecting parasitic branch is lower than the first frequency.

10. The electronic device according to claim 9, characterized in that The first directing parasitic branch is located on a side of the bottom radiating unit facing the display screen, and the first directing parasitic branch is used to direct the radiation pattern of the bottom radiating unit toward the display screen.

11. The electronic device according to claim 10, characterized in that The first directing parasitic branch is located on the display screen, and the first directing parasitic branch is located within a projection area of ​​the bottom radiation unit on the display screen.

12. The electronic device according to claim 9, wherein: The first reflective parasitic branch is located on a side of the bottom radiating unit facing the rear housing, and the first reflective parasitic branch reflects the radiation pattern of the bottom radiating unit in a direction toward the display screen.

13. The electronic device according to claim 12, wherein: The first reflective parasitic branch is located on a surface of the rear shell facing the middle frame.

14. The electronic device according to claim 9, wherein: The second directing parasitic branch is located on a side of the top radiating unit facing the rear shell, and the second directing parasitic branch is used to direct the radiation pattern of the top radiating unit toward the rear shell.

15. The electronic device according to claim 14, characterized in that The second guiding parasitic branch is located on a surface of the rear shell facing the top radiation unit, and the second guiding parasitic branch is located within a projection area of ​​the top radiation unit on the rear shell.

16. The electronic device according to claim 9, characterized in that The second reflective parasitic branch is located on a side of the top radiating unit facing the display screen, and the second reflective parasitic branch reflects the radiation pattern of the top radiating unit in a direction toward the rear housing.

17. The electronic device according to claim 16, wherein: The second reflective parasitic branch is located on the display screen.

18. An electronic device assembly, characterized in that: include: An electronic device and a protective cover located outside the electronic device; The electronic device comprises at least: a display screen, a rear cover, a radiation unit, and a middle frame located between the display screen and the rear cover, wherein the middle frame is located between the display screen and the rear cover, the middle frame comprises at least a metal frame, and the radiation unit uses the metal frame as a radiator; The protective cover includes at least one parasitic branch, and the parasitic branch and the metal frame are spaced apart in the thickness direction of the electronic device; The radiating unit is configured to operate in a first frequency band, the first frequency band being a frequency band from a first frequency to a second frequency, and the first frequency being lower than the second frequency; The parasitic branches include at least one of directed parasitic branches and reflected parasitic branches; The distance between the deflecting parasitic branch and the metal frame is less than 1 / 4 wavelength corresponding to the resonant frequency of the radiating unit, the length of the deflecting parasitic branch is less than 1 / 2 wavelength corresponding to the resonant frequency of the radiating unit, and the resonant frequency of the deflecting parasitic branch is higher than the second frequency; the deflecting parasitic branch is used to direct the radiation pattern of the radiating unit in the direction toward the display screen or in the direction toward the rear housing; The distance between the reflective parasitic branch and the metal frame is less than 1 / 4 wavelength corresponding to the resonant frequency of the radiation unit, the length of the reflective parasitic branch is greater than 1 / 2 wavelength corresponding to the resonant frequency of the radiation unit, and the resonant frequency generated by the reflective parasitic branch is lower than the first frequency; the reflective parasitic branch is used to reflect the radiation pattern of the radiation unit in the direction toward the rear shell or in the direction toward the display screen.

19. The electronic device assembly according to claim 18, wherein: The protective cover at least comprises: a main body portion and a wrapping portion connected to the main body portion; The main body is fitted with the rear cover, and the wrapping portion is arranged around at least a portion of the metal frame of the electronic device, and the wrapping portion covers the joint between at least a portion of the metal frame and the display screen, and the joint between the metal frame and the rear cover; The parasitic branch is provided on a side of the wrapping portion close to the rear shell; or, the parasitic branch is provided on a side of the wrapping portion close to the display screen; or, the parasitic branch is provided on both a side of the wrapping portion close to the rear shell and a side of the wrapping portion close to the display screen.

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