WO2023226919A1

WO2023226919A1 - Electronic device

Info

Publication number: WO2023226919A1
Application number: PCT/CN2023/095465
Authority: WO
Inventors: 马国忠; 孙乔; 叶茂; 李堃
Original assignee: 华为技术有限公司
Priority date: 2022-05-24
Filing date: 2023-05-22
Publication date: 2023-11-30
Also published as: CN117154383A

Abstract

Embodiments of the present application provide an electronic device. The electronic device comprises a metal housing. Gaps are provided on the metal housing to form an antenna unit. The antenna unit is characterized by a small size, and has relatively good 3 dB lobe width. The electronic device comprises a metal housing, a metal partition plate, a first back plane and a first antenna unit. The metal housing comprises a first surface and a second surface which are opposite to each other, and a side surface which connects the first surface and the second surface. The metal partition plate and the first back plane are located in the housing and enclose a first cavity with the first surface and the side surface. The first antenna unit comprises the first cavity. The first surface and the side surface enclosing the first cavity are provided with a first gap, a second gap and a third gap. One end of the third gap is communicated with the first gap, and the other end of the third gap is communicated with the second gap.

Description

an electronic device

This application claims priority to the Chinese patent application filed with the China Patent Office on May 24, 2022, with application number 202210572341.0 and application title "An electronic device", the entire content of which is incorporated into this application by reference.

Technical field

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

Background technique

Wireless fidelity (WiFi) communication technology is a wireless networking technology, which can be simply understood as wireless Internet access. It is developed based on the IEEE802.11 series of standards. The most common applications of WiFi technology in life are wireless routers and customer premise equipment/customer premise equipment (CPE), as well as electronic devices connected through the WiFi technology of wireless routers and CPE, such as speakers, etc. . As long as the speaker device is within the signal range of the wireless router and CPE, it can use WiFi to access the Internet. WiFi technology allows wireless electronic devices, such as computers and mobile phones, to connect to each other wirelessly and is suitable for short-distance transmission. Currently, the most commonly used WiFi access standards are IEEE802.11n (fourth generation) and 802.11ac (fifth generation), operating in the 2.4GHz frequency band and 5GHz frequency band.

However, more and more electronic devices use metal materials as their casings, such as routers, smart speakers and smart screens, cars and drones, etc. In this type of higher-end products, the antenna must be placed in a fully enclosed metal cavity or blocked by large metal. Designing any antenna in this environment presents various challenges. It will be more difficult to get an antenna system with comprehensive performance.

Contents of the invention

An embodiment of the present application provides an electronic device. The electronic device includes a metal shell, and a gap is opened in the metal shell to form an antenna unit.

In a first aspect, an electronic device is provided, including: a metal casing, including a first surface and a second surface arranged oppositely, and a side connecting the first surface and the second surface; and a metal partition located in the casing. , and is parallel to the first surface; a first back plate is located in the housing and forms a first cavity with the first surface, the partition and the side; a first antenna unit includes The first cavity; wherein, a first slit, a second slit and a third slit are provided on the first surface and side surfaces surrounding the first cavity; one end of the third slit is connected to the first slit The other end of the third slit is connected to the second slit; the extension direction of the first slit or the extension direction of the second slit is perpendicular to the first direction, and the first direction is perpendicular to the the direction of the first surface.

According to the technical solution of the embodiment of the present application, a first cavity is surrounded by a plurality of components on the upper part of the metal shell, and the first cavity is used as the radiation body of the antenna structure, and communication is provided on the surface of the shell surrounding the cavity. The three slits allow the antenna structure to be miniaturized while having a better 3dB beam width.

In conjunction with the first aspect, in some implementations of the first aspect, the interior of the housing is divided into a second cavity and a third cavity by the partition.

According to the technical solution of the embodiment of the present application, the separator may be a complete metal layer. The cavity enclosed by the housing can be divided into a second cavity and a third cavity by a partition. Alternatively, in one embodiment, the partition may be a hollow metal layer, including only the portion surrounding the cavity (for example, the first cavity) of the antenna unit, and removing metal from other areas.

With reference to the first aspect, in some implementations of the first aspect, the first slit is located on the first surface, and the second slit is located on the side.

According to the technical solution of the embodiment of the present application, in one embodiment, the first slit may be located on the first surface, and the second slit may be located on the side. For example, the first slit may be disposed at the edge of the first surface and is surrounded by the first surface and the side surface. In this case, the third slit may be disposed at the side surface. Alternatively, the first slit may be disposed on the first surface and offset from the edge of the first surface. In this case, part of the third slit may be disposed on the first surface and the other part may be disposed on the side.

With reference to the first aspect, in some implementations of the first aspect, the first slit, the second slit and the third slit form an I-shaped slit structure or a C-shaped slit structure.

According to the technical solution of the embodiment of the present application, both ends of the third slit can be connected with the ends of the first slit and the second slit respectively to form a C-shaped (which can be understood as forming by rotating the U-shaped structure by 90°) slit structure. . Alternatively, in one embodiment, both ends of the third slit may be connected to positions deviating from the ends of the first slit and the second slit respectively to form an I-shaped slit structure.

With reference to the first aspect, in some implementations of the first aspect, the length of the first gap and the length of the second gap are different.

According to the technical solution of the embodiment of the present application, the length (arc length) of the first gap and the length (arc length) of the second gap may be the same or different. The width of the first slit and the width of the second slit may be the same or different. In one embodiment, the width of the third slit may be smaller than the width of the first slit or the width of the second slit.

With reference to the first aspect, in some implementations of the first aspect, the distance between the partition and the first surface is less than or equal to 8 mm.

With reference to the first aspect, in some implementations of the first aspect, the distance between the partition and the first surface is less than or equal to 4 mm.

According to the technical solution of the embodiment of the present application, the distance between the partition and the first surface is less than or equal to the first threshold. The first threshold can be 8mm, 4mm or 2mm. The distance between the partition and the first surface can also be understood as the height of the first cavity. By arranging the gap structure in the first cavity, the space occupied by the antenna unit in the housing can be compressed (the size occupied in the height direction is reduced), and the antenna unit can maintain good radiation performance.

With reference to the first aspect, in some implementations of the first aspect, the first antenna unit includes a feed branch; the feed branch is located in the first cavity, and the first end of the feed branch is provided There are feed points for feeding electrical signals.

With reference to the first aspect, in some implementations of the first aspect, the second end of the feed branch is connected to the side surface.

According to the technical solution of the embodiment of the present application, the feed branch can feed the first antenna unit through indirect coupling (the second end without a feed point is not connected to the conductor around the gap). Alternatively, in one embodiment, the feeding branch may feed the first antenna unit through direct feeding (the second end without a feeding point is connected to the conductor around the gap, for example, connected to the side).

With reference to the first aspect, in some implementations of the first aspect, the first cavity includes a first dielectric layer and a second dielectric layer; the feeding branch is located in the first dielectric layer and the second dielectric layer. between media layers.

According to the technical solution of the embodiment of the present application, the first cavity may be filled with dielectric to reduce the size of the first antenna unit.

In conjunction with the first aspect, in some implementations of the first aspect, the 3dB lobe width of the pattern generated by the first antenna unit is greater than or equal to 180°.

According to the technical solution of the embodiment of the present application, the first antenna unit has a low directivity coefficient and a 3dB lobe width greater than 180°, which can cover the x-axis forward area. Therefore, only two first antenna units are needed in the electronic device to achieve horizontal (xoy plane) omnidirectional coverage.

With reference to the first aspect, in some implementations of the first aspect, the electronic device further includes: a second backplane located in the housing and connected with the first surface, the partition and the side surface. Enclosing a fourth cavity; a second antenna unit, including the fourth cavity; wherein a fourth slit, a fifth slit and a sixth slit are provided on the first surface and side surfaces of the fourth cavity; One end of the sixth slit is connected to the fourth slit, and the other end of the sixth slit is connected to the fifth slit; the extension direction of the fourth slit or the extension direction of the fifth slit is consistent with the extension direction of the sixth slit. The first direction is vertical.

With reference to the first aspect, in some implementations of the first aspect, the first distance and the second distance between the first antenna unit and the second antenna unit are the same; wherein the first distance is the The distance between the first antenna unit and the second antenna unit along the side in the clockwise direction, and the second distance is the distance between the first antenna unit and the second antenna unit along the side in the counterclockwise direction. The distance in the clockwise direction.

According to the technical solution of the embodiment of the present application, when the first antenna unit and the second antenna unit are same-frequency antennas, they include the same operating frequency band. The first antenna unit and the second antenna unit are respectively arranged on both sides of the electronic device, which can enable the electronic device to achieve full coverage on the horizontal plane (xoy plane), avoid electric field zero points, and improve the transmission rate of the electronic device.

With reference to the first aspect, in some implementations of the first aspect, the working frequency band of the first antenna unit includes the 2.4G frequency band of wireless fidelity WiFi, or the 5G frequency band of WiFi; and/or the second The working frequency band of the antenna unit includes the 2.4G frequency band of wireless fidelity WiFi, or the 5G frequency band of WiFi.

With reference to the first aspect, in some implementations of the first aspect, the electronic device further includes: a third antenna unit and a fourth antenna unit; wherein the third antenna unit is located between the first antenna unit and the first antenna unit. between the second antenna unit; the second antenna unit is located between the third antenna unit and the fourth antenna unit.

According to the technical solution of the embodiment of the present application, the first antenna unit, the second antenna unit, the third antenna unit and the fourth antenna unit may include the same working frequency band and be applied to the MIMO system as the antenna sub-units therein. Alternatively, the first antenna unit and the second antenna unit may be same-frequency antennas, including the same operating frequency band, and the third antenna unit and the fourth antenna unit may be same-frequency antennas, including the same operating frequency band.

With reference to the first aspect, in some implementations of the first aspect, the working frequency band of the first antenna unit and the working frequency band of the second antenna unit both include the 2.4G frequency band of WiFi; and/or, the third antenna unit The working frequency band of the three antenna units and the working frequency band of the fourth antenna unit both include the 5G frequency band of WiFi.

With reference to the first aspect, in some implementations of the first aspect, the electronic device is any one of a Bluetooth speaker, customer front-end equipment (CPE), a router, a smart screen or a drone.

Description of the drawings

Figure 1 is a schematic architectural diagram of a mobile communication system suitable for embodiments of the present application.

FIG. 2 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.

FIG. 3 is a three-dimensional directional diagram of the slot antenna structure in the electronic device shown in FIG. 2 .

Figure 4 is a directional diagram in the xoy plane of the slot antenna structure in the electronic device shown in Figure 2.

FIG. 5 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.

FIG. 6 is a three-dimensional directional diagram of the slot antenna structure in the electronic device shown in FIG. 5 .

FIG. 7 is a schematic three-dimensional structural diagram of the electronic device 100 provided by the embodiment of the present application.

FIG. 8 is a schematic cross-sectional view along xoz of the electronic device 100 provided by the embodiment of the present application.

Figure 9 is a schematic structural diagram of the second cavity provided by an embodiment of the present application.

FIG. 10 is a schematic cross-sectional view along xoz of another electronic device 100 according to an embodiment of the present application.

Figure 11 is a schematic structural diagram of the second cavity provided by an embodiment of the present application.

FIG. 12 is a top view of the electronic device 100 provided by the embodiment of the present application.

Figure 13 is the simulation results of S parameters of multiple antenna units.

Figure 14 is the simulation result of the radiation efficiency of multiple antenna units.

Figure 15 is the simulation result of the isolation between multiple antenna units.

Figure 16 is the simulation result of ECC between the first antenna unit and the second antenna unit.

Figure 17 is the simulation result of ECC between the third antenna unit and the fourth antenna unit.

FIG. 18 is a top view of the three-dimensional directional diagram of the first antenna unit provided by the embodiment of the present application.

Figure 19 is a direction diagram of the horizontal plane (xoy plane) of the first antenna unit provided by the embodiment of the present application.

Figure 20 is a directional pattern generated by the first antenna unit and a directional pattern generated by the second antenna unit.

Figure 21 is a composite pattern of the first antenna unit and the second antenna unit.

Figure 22 is a composite pattern of the third antenna unit and the fourth antenna unit.

FIG. 23 is a schematic structural diagram of an electronic device 200 provided by an embodiment of the present application.

FIG. 24 is a composite pattern of the antenna unit in the electronic device 200 shown in FIG. 23 .

Detailed ways

The terms that may appear in the embodiments of this application are explained below.

Coupling: can be understood as direct coupling and/or indirect coupling, and "coupling connection" can be understood as direct coupling connection and/or indirect coupling connection. Direct coupling can also be called "electrical connection", which is understood as the physical contact and electrical conduction of components; it can also be understood as the printed circuit board (PCB) copper foil or wires between different components in the circuit structure. A form of connection through physical lines that can transmit electrical signals; "indirect coupling" can be understood as two conductors being electrically connected through space/non-contact. In one embodiment, indirect coupling may also be called capacitive coupling, for example, signal transmission is achieved by forming an equivalent capacitance through coupling between a gap between two conductive members.

Connection/connection: It can refer to a mechanical connection relationship or a physical connection relationship. For example, the connection between A and B or the connection between A and B can refer to the existence of fastening components (such as screws, bolts, rivets, etc.) between A and B. Or A and B are in contact with each other and A and B are difficult to separate.

Connecting: The conduction or connection between two or more components through the above "electrical connection" or "indirect coupling" method for signal/energy transmission can be called connection.

Relative/relative setting: The relative setting of A and B can refer to the opposite to (opposite to, or face to face) setting of A and B.

Resonance/resonance frequency: Resonance frequency is also called resonance frequency. The resonant frequency can have a frequency range, that is, the frequency range in which resonance occurs. The frequency corresponding to the strongest resonance point is the center frequency point frequency. The return loss characteristics of the center frequency can be less than -20dB.

Resonance frequency band/communication frequency band/working frequency band: No matter what type of antenna, it is always within a certain frequency range (frequency band width). For example, the working frequency band of an antenna that supports the B40 frequency band includes frequencies in the range of 2300MHz to 2400MHz, or in other words, the working frequency band of the antenna includes the B40 frequency band. The frequency range that meets the index requirements can be regarded as the working frequency band of the antenna.

Electrical length: It can refer to the ratio of physical length (i.e. mechanical length or geometric length) to the wavelength of the transmitted electromagnetic wave. The electrical length can satisfy the following formula:

Among them, L is the physical length, and λ is the wavelength of the electromagnetic wave.

In some embodiments of the present application, the physical length of the radiator can be understood to be within the range of ±25% of the electrical length of the radiator.

In some embodiments of the present application, the physical length of the radiator can be understood to be within the range of ±10% of the electrical length of the radiator.

Wavelength: or working wavelength, which can be the wavelength corresponding to the center frequency of the resonant frequency or the center frequency of the working frequency band supported by the antenna. For example, assuming that the center frequency of the B1 uplink frequency band (resonant frequency is 1920MHz to 1980MHz) is 1955MHz, the operating wavelength can be the wavelength calculated using the frequency of 1955MHz. Not limited to the center frequency, "working wavelength" can also refer to the wavelength corresponding to the resonant frequency or non-center frequency of the working frequency band.

The limitations on position and distance mentioned in the embodiments of the present application, such as the middle or middle position, are based on the current technological level and are not absolutely strict definitions in a mathematical sense. For example, the middle (position) of the conductor can be a conductor section including the midpoint on the conductor, or a conductor section of one-eighth wavelength including the midpoint of the conductor, where the wavelength can be corresponding to the working frequency band of the antenna. The wavelength can be the wavelength corresponding to the center frequency of the working frequency band, or the wavelength corresponding to the resonance point. As another example, the middle (location) of the conductor may be a portion of the conductor on the conductor that is less than a predetermined threshold (eg, 1 mm, 2 mm, or 2.5 mm) from the midpoint.

The definitions mentioned in the embodiments of this application include collinear, coaxial, coplanar, symmetrical (for example, axial symmetry, or central symmetry, etc.), parallel, perpendicular, identical (for example, the same length, the same width, etc.), etc. , are all based on the current technological level, rather than an absolutely strict definition in a mathematical sense. There may be a deviation less than a predetermined threshold (eg 1 mm, 0.5 m, or 0.1 mm) in the line width direction between the edges of two collinear radiating branches or two antenna units. There may be a deviation less than a predetermined threshold (eg 1 mm, 0.5 m, or 0.1 mm) between the edges of two coplanar radiating branches or two antenna elements in a direction perpendicular to their coplanar plane. There may be a predetermined angle (eg ±5°, ±10°) deviation between two antenna units that are parallel or perpendicular to each other.

Antenna system efficiency (total efficiency): refers to the ratio of input power to output power at the port of the antenna.

Antenna radiation efficiency: Radiation efficiency is a measure of the radiation ability of an antenna. It refers to the ratio of the power radiated by the antenna to space (that is, the power of the electromagnetic wave part that is effectively converted) and the active power input to the antenna. Among them, the active power input to the antenna = the input power of the antenna - the loss power; the loss power mainly includes the return loss power and the ohmic loss power of the metal and/or the dielectric loss power. Metal loss and dielectric loss are factors affecting radiation efficiency.

Those skilled in the art can understand that efficiency is generally expressed as a percentage, and there is a corresponding conversion relationship between it and dB. The closer the efficiency is to 0dB, the better the efficiency of the antenna is.

Antenna pattern: also called radiation pattern. It refers to the graph in which the relative field strength (normalized mode value) of the antenna radiation field changes with the direction at a certain distance from the antenna. It is usually represented by two mutually perpendicular plane patterns in the maximum radiation direction of the antenna.

Antenna patterns usually have multiple radiation beams. The radiation beam with the greatest radiation intensity is called the main lobe, and the remaining radiation beams are called side lobes or side lobes. Among the side lobes, the side lobes in the opposite direction to the main lobe are also called back lobes.

3dB beam width: also known as beam width, main beam width, half power angle, refers to the angle width formed at 3dB below the main beam peak (maximum) in the pattern generated by the antenna.

Directivity coefficient: It is a quantity that characterizes the concentration ability of the energy radiated by the antenna in the spatial distribution. It is defined as the ratio of the radiation intensity of the antenna in the maximum radiation direction to the average radiation intensity under the same radiation power or the radiation intensity in a given direction and the Ratio of average radiation intensity.

Antenna return loss: It can be understood as the ratio of the signal power reflected back to the antenna port through the antenna circuit and the transmit power of the antenna port. The smaller the reflected signal is, the greater the signal radiated to space through the antenna is, and the greater the antenna's radiation efficiency is. The larger the reflected signal is, the smaller the signal radiated to space through the antenna is, and the smaller the antenna's radiation efficiency is.

Antenna return loss can be represented by the S11 parameter, which is one of the S parameters. S11 represents the reflection coefficient, which can characterize the antenna's emission efficiency. The S11 parameter is usually a negative number. The smaller the S11 parameter, the smaller the return loss of the antenna, and the smaller the energy reflected back by the antenna itself, which means that more energy actually enters the antenna, and the higher the system efficiency of the antenna is. S11 parameter The larger the value, the greater the antenna return loss and the lower the antenna system efficiency.

It should be noted that in engineering, the S11 value of -6dB is generally used as a standard. When the S11 value of an antenna is less than -6dB, it can be considered that the antenna can work normally, or the antenna's radiation efficiency can be considered to be good.

Envelope correlation coefficient (ECC): It can be understood as the correlation between two antenna units in a MIMO system. It can be used to evaluate the independence between antenna units in terms of radiation patterns and polarization. Envelope correlation coefficient The lower it is, the lower the correlation between the two antenna elements and the greater the independence of the individual antennas.

Ground, or floor: can generally refer to at least part of any ground layer, or ground plate, or ground metal layer, etc. in an electronic device (such as a mobile phone), or any combination of any of the above ground layers, or ground plates, or ground components, etc. At least in part, "ground" can be used to ground components within electronic equipment. In one embodiment, "ground" may be the grounding layer of the circuit board of the electronic device, or it may be the grounding plate formed by the middle frame of the electronic device or the grounding metal layer formed by the metal film under the screen. In one embodiment, the circuit board may be a printed circuit board (PCB), such as an 8-, 10-, or 12- to 14-layer board with 8, 10, 12, 13, or 14 layers of conductive material, or by a circuit board such as Components separated and electrically insulated by dielectric or insulating layers such as fiberglass, polymer, etc. In one embodiment, the circuit board includes a dielectric substrate, a ground layer and a wiring layer, and the wiring layer and the ground layer are electrically connected through via holes. In one embodiment, components such as a display, touch screen, input buttons, transmitter, processor, memory, battery, charging circuit, system on chip (SoC) structure, etc. may be mounted on or connected to the circuit board; Or electrically connected to trace and/or ground planes in the circuit board. For example, the RF source is placed on the wiring layer.

Any of the above ground layers, or ground plates, or ground metal layers are made of conductive materials. In one embodiment, the conductive material can be any of the following materials: copper, aluminum, stainless steel, brass and their alloys, copper foil on an insulating substrate, aluminum foil on an insulating substrate, gold foil on an insulating substrate, Silver-plated copper, silver-plated copper foil on an insulating substrate, silver foil and tin-plated copper on an insulating substrate, cloth impregnated with graphite powder, graphite-coated substrate, copper-plated substrate, brass-plated substrate sheet and aluminized substrate. Those skilled in the art can understand that the ground layer/ground plate/ground metal layer can also be made of other conductive materials.

The technical solutions of the embodiments of the present application will be described below with reference to the accompanying drawings.

As shown in Figure 1, the mobile communication system 100 may include at least one network device 101, at least one customer premise equipment (CPE) 102 and at least one user equipment (user equipment, UE)103. Figure 1 is only a schematic diagram. The communication system may also include other network equipment, such as wireless relay equipment and wireless backhaul equipment, which are not shown in Figure 1 . The embodiments of the present application do not limit the number and specific types of network devices and UEs included in the mobile communication system.

UE103 in the embodiment of this application may refer to a mobile phone, a tablet computer, a laptop computer, a smart bracelet, a smart watch, a smart helmet, smart glasses, etc. The electronic device may also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a device with wireless communications Functional handheld devices, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, electronic devices in 5G networks or electronic devices in future evolved public land mobile communications networks (public land mobile networks, PLMN), etc., this The application examples do not limit this. The technical solution provided by this application is applicable to UE103 using one or more of the following communication technologies: Bluetooth (BT) communication technology, global positioning system (GPS) communication technology, wireless fidelity (WiFi) ) communication technology, global system for mobile communications (GSM) communication technology, wideband code division multiple access (WCDMA) communication technology, long term evolution (LTE) communication technology, 5G Communication technology and other future communication technologies, etc.

The network device 101 in the embodiment of the present application may be a device used to communicate with electronic devices. The network device may be a network device (base transceiver station, BTS) in the GSM system or code division multiple access (code division multiple access, CDMA). ), or it can be a network device (nodeB, NB) in the WCDMA system, or it can be an evolutionary network device (evolutional nodeB, eNB or eNodeB) in the LTE system, or the network device can be a relay station, access point, vehicle Equipment, wearable devices and network equipment in future 5G networks (new generation nodeB, gNB or gNodeB) or network equipment in future evolved PLMN networks, as well as subsequent support for the third generation partnership project (3rd generation partnership project, 3GPP) The protocol version of network equipment, etc. is not limited by the embodiments of this application.

It should be understood that the CPE 102 can receive the cellular network signal sent by the network device 101 and transmit the cellular network signal to the user equipment 103 to enable the user equipment 103 to network. For example, the CPE 102 can convert the 2G/3G/4G/5G signals transmitted by the network device 101 into WiFi signals to enable the user equipment 103 to network.

More and more electronic devices use metal materials as their casings (casings), such as routers, smart speakers and smart screens, cars and drones, etc. In this type of higher-end products, the antenna is placed in a closed metal cavity formed by a metal shell or is shielded by a large metal. Designing any antenna in this environment presents various challenges.

As shown in Figure 2, the metal shell is a cylindrical shell as an example for explanation. Usually, a horizontal gap (with the xoy plane as the horizontal plane) is set in the upper part of the casing to generate resonance and meet the communication needs of electronic equipment.

It should be understood that for simplicity of discussion, in the electronic device shown in FIG. 2 , the diameter of the metal housing is 100 mm, the height is 170 mm, the width of the gap is 1 mm, and the length of the gap is 48 mm.

The slot antenna structure shown in Figure 2 resonates at 2.54GHz. The three-dimensional pattern produced at this frequency is shown in Figure 3. The planar pattern produced in the xoy plane is shown in Figure 4.

As shown in Figure 3, in the three-dimensional directional diagram, the radiation is concentrated in the direction of the gap (-x direction), and there are multiple electric field zero points (the minimum value in the electric field depression area) in the opposite direction (x) of the gap. , its directivity coefficient is 6.3dBi.

As shown in Figure 4, in the direction pattern of the horizontal plane (xoy plane), its 3dB lobe width is narrow, only 87°. At least 4 antennas are needed to achieve omnidirectional coverage in the horizontal plane. However, the length of the gap opened on the casing is 48mm, which is too long, making it difficult to realize the layout of multiple antennas.

Moreover, in the above-mentioned electronic equipment, due to the large cavity formed by the casing, resonance in other frequency bands will be excited, which may interfere with the normal operation of the electronic equipment.

It should be understood that an inverted-F antenna (IFA) can also be provided in an electronic device. The IFA can be set on top of the IFA, as shown in Figure 5. However, for the above-mentioned electronic equipment, the metal shell is also the floor of the antenna. Due to the high height of the shell, the multiple half-wavelength currents generated on the shell will also generate radiation. After superimposing with the radiation generated by the antenna, the The direction diagram is shown in Figure 6. Since the shell also participates in radiation as a floor, its direction pattern has multiple electric field zero points. When electromagnetic waves (electrical signals) are incident from the direction of the zero point of the electric field, the antenna reception effect is poor and the reception rate of the electronic device is reduced.

The embodiment of the present application provides an electronic device. The electronic device includes a metal shell. A gap is opened in the metal shell to form an antenna unit. The antenna unit has the characteristics of small size and can have a good 3dB beam width. .

7 to 12 are schematic structural diagrams of an electronic device 100 provided by embodiments of the present application. Among them, FIG. 7 is a schematic three-dimensional structural diagram of the electronic device 100 provided by the embodiment of the present application. FIG. 8 is a schematic cross-sectional view along xoz of the electronic device 100 provided by the embodiment of the present application. Figure 9 is a schematic structural diagram of the second cavity provided by an embodiment of the present application. FIG. 10 is a schematic cross-sectional view along xoz of another electronic device 100 according to an embodiment of the present application. Figure 11 is a schematic structural diagram of the second cavity provided by an embodiment of the present application. FIG. 12 is a top view of the electronic device 100 provided by the embodiment of the present application.

As shown in FIG. 7 , the electronic device 100 may include a metal housing 110 . The housing 110 may include a first surface 111 and a second surface 113 arranged oppositely, and a side surface 112 connecting the first surface 111 and the second surface 113 .

As shown in FIG. 8 , the electronic device 100 may further include a metal spacer 120 and a first back plate 131 . The partition 120 and the first back plate 131 may be disposed in the housing 110 , and the partition 120 may be disposed parallel to the first surface 111 . The first surface 111 , the partition 120 , the first back plate 131 and the side surfaces 112 form a first cavity 141 .

As shown in FIG. 9 , the electronic device 100 may further include a first antenna unit 151 . The first antenna unit may include a first cavity 141. The first surface 111 and the side surface 112 surrounding the first cavity 141 are provided with a first gap 161 , a second gap 162 and a third gap 163 . One end of the third slit 163 is connected to the first slit 161 , and the other end of the third slit 163 is connected to the second slit 162 . The extending direction of the first slit 161 or the extending direction of the second slit 162 is perpendicular to the first direction, and the first direction is a direction perpendicular to the first surface 111 , for example, the z direction.

It should be understood that the extension direction of the first slit 161 can be understood as the extension direction of the arc formed by the first slit 161 , or it can also be the extension direction of the line connecting two end points of the first slit 161 .

In the embodiment of the present application, a first cavity is surrounded by multiple components on the upper part of the metal shell. The first cavity serves as the radiation main body of the antenna structure. Three connected slits are provided on the surface of the shell that surrounds the cavity. The antenna structure can be miniaturized while having a better 3dB beam width.

In one embodiment, the spacer 120 may be a complete metal layer. The cavity surrounded by the housing 110 can be divided into a second cavity 121 and a third cavity 122 by the partition 120 . The second cavity 121 may be surrounded by a partition 120 , a first surface 111 and a side surface 112 . The third cavity 122 may be surrounded by the partition 120 , the second surface 113 and the side surfaces 112 . It should be understood that the second cavity 121 can be used to dispose the antenna unit, and the third cavity 122 can be used to dispose other electronic components in the electronic device, such as PCB, etc. The cavity surrounded by the housing 110 is divided into the second cavity 121 and the third cavity 122 by the partition 120 , which can reduce mutual interference between the electronic components in the second cavity 121 and the third cavity 122 .

Alternatively, in one embodiment, the partition 120 may be a hollow metal layer, including only the portion surrounding the cavity of the antenna unit (for example, the first cavity 141 ), and removing metal from other areas, as shown in FIG. 10 . It should be understood that the partition 120 The hollow design can further expand the internal layout space of electronic equipment.

In one embodiment, the first slit 161 may be located on the first surface 111 and the second slit 162 may be located on the side 112 . For example, the first slit 161 may be disposed at the edge of the first surface 111 and is surrounded by the first surface 111 and the side 112. In this case, the third slit 163 may be disposed at the side 112, as shown in FIG. 9 . Alternatively, the first slit 161 may be disposed on the first surface 111 and offset from the edge of the first surface 111 . In this case, part of the third slit 163 may be disposed on the first surface 111 and the other part may be disposed on the side 112 .

In one embodiment, the first slit 161 , the second slit 162 and the third slit 163 may all be located on the side 112 . It should be understood that the embodiment of the present application does not limit the specific positions of the first gap 161, the second gap 162, and the third gap 163, and they can be adjusted according to the actual design.

In one embodiment, the length (arc length) of the first gap 161 and the length (arc length) of the second gap 162 may be the same, or different. In one embodiment, the width of the first slit 161 and the width of the second slit 162 may be the same or different. In one embodiment, the width of the third slit 163 may be smaller than the width of the first slit 161 or the width of the second slit 162 . It should be understood that the embodiment of the present application does not limit the specific parameters of the first gap 161, the second gap 162, and the third gap 163, and they can be adjusted according to the actual design. For example, the length of the first gap 161 can be reduced and the length of the second gap 162 can be increased to ensure that the total length of the gap is the same.

In one embodiment, both ends of the third slit 163 can be connected with the ends of the first slit 161 and the second slit 162 respectively to form a C-shaped (which can be understood as forming by rotating a U-shaped structure by 90°) slit structure. . It should be understood that the opening of the C-shaped slit structure can be oriented to the left or right side. This embodiment of the present application does not limit this and can be adjusted according to the actual layout in the electronic device.

Alternatively, in one embodiment, both ends of the third slit 163 may be connected to positions deviating from the ends of the first slit 161 and the second slit 162 respectively to form an I-shaped slit structure. It should be understood that this application does not limit the connection position between the third gap 163 and the first gap 161 and the second gap 162, and the layout can be made according to the actual electronic device. For simplicity of discussion, the embodiment of the present application only takes the first slit 161 , the second slit 162 and the third slit 163 forming an I-shaped slit structure as an example for description.

In one embodiment, the distance between the partition 120 and the first surface 111 is less than or equal to the first threshold. The first threshold can be 8mm, 4mm or 2mm. The distance between the partition 120 and the first surface 111 can also be understood as the height of the first cavity 141 . For example, when the partition 120 has a hollow structure, the partition 120 and the first back plate 131 can be an integrated structure, and the distance between the partition 120 and the first surface 111 is the height of the first cavity 141, or, also, It may be the height of the first back plate 131 .

It should be understood that the technical solution provided by the embodiments of the present application uses a gap structure provided in the first cavity to compress the space of the housing occupied by the antenna unit (reduce the size occupied in the height direction) and maintain good radiation performance of the antenna unit.

In one embodiment, the first back plate 131 may have a U-shaped structure, as shown in FIG. 11 . Both ends of the first back plate 131 are connected to the side 112 of the housing.

In one embodiment, the first antenna unit 151 may include a feed stub 160 . The feed branch 160 may be disposed in the first cavity, and a feed point 161 may be disposed at a first end of the feed branch 160. The feed point 161 may be used to feed electrical signals so that the first antenna unit 151 generates resonance.

In one embodiment, the feed branch 160 may be L-shaped or linear. The embodiment of the present application does not limit this and can be adjusted according to the actual design.

In one embodiment, the feed branch 160 can be coupled indirectly (the second end of which the feed point is not provided is not connected to the gap). The first antenna unit 151 is fed by a surrounding conductor connection). Alternatively, in one embodiment, the feeding branch 160 can feed the first antenna unit 151 through direct feeding (the second end without a feeding point is connected to the conductor around the gap, for example, connected to the side 112 ). electricity.

In one embodiment, the first cavity may be filled with dielectric to reduce the size of the first antenna unit 151 . For example, the first antenna unit 151 may include a first dielectric plate and a second dielectric plate disposed in the first cavity, and the feeding branch 160 may be disposed between the first dielectric plate and the second dielectric plate.

In one embodiment, the electronic device 100 may further include a second backplane 132 and a second antenna unit 152, as shown in FIG. 11 . The second back plate 132 is located in the housing and forms a fourth cavity with the first surface, partition and side surfaces. A fourth slit, a fifth slit and a sixth slit are provided on the first surface and side surfaces surrounding the fourth cavity. One end of the sixth slit is connected to the fourth slit, and the other end of the sixth slit is connected to the fifth slit. The extending direction of the fourth slit or the extending direction of the fifth slit is perpendicular to the first direction (eg, z direction). The second antenna unit 152 includes a fourth cavity.

In one embodiment, the first antenna unit 151 and the second antenna unit 152 may be located on both sides of the side 112 respectively, as shown in FIG. 12 . The first distance L1 and the second distance L2 between the first antenna unit 151 and the second antenna unit 152 may be the same (for example, the error between L1 and L2 is less than 30%), and the first distance L1 is the first distance L1 of the first antenna unit 151 and the second antenna unit 152 along the side 112 in the clockwise direction. The second distance L2 is the distance between the first antenna unit 151 and the second antenna unit 152 in the counterclockwise direction along the side 112 .

In one embodiment, the working frequency band of the first antenna unit 151 and the working frequency band of the second antenna unit 152 may both include the first frequency band. For example, the first frequency band may be the 2.4G frequency band or the 5G frequency band of WiFi.

In one embodiment, the 3dB lobe width of the pattern generated by the first antenna unit 151 and the 3dB lobe width of the pattern generated by the second antenna unit 152 may be greater than or equal to 180°. In one embodiment, the 3dB lobe width of the pattern generated by the first antenna unit 151 and the 3dB lobe width of the pattern generated by the second antenna unit 152 may be greater than or equal to 270°.

It should be understood that when the first antenna unit 151 and the second antenna unit 152 are antennas of the same frequency, they include the same operating frequency band. The first antenna unit 151 and the second antenna unit 152 are respectively arranged on both sides of the electronic device, which can enable the electronic device to achieve full coverage on the horizontal plane (xoy plane), avoid electric field zero points, and improve the transmission rate of the electronic device.

In one embodiment, the electronic device 100 may further include a third antenna unit 153 and a fourth antenna unit 154, as shown in FIG. 12 . The third antenna unit 153 is located between the first antenna unit 151 and the second antenna unit 152 , and the second antenna unit 152 is located between the third antenna unit 153 and the fourth antenna unit 154 .

It should be understood that the first antenna unit 151, the second antenna unit 152, the third antenna unit 153 and the fourth antenna unit 154 may include the same operating frequency band and be applied to a multiple-input multiple-output (MIMO) system. , as the antenna subunit. Alternatively, the first antenna unit 151 and the second antenna unit 152 may be same-frequency antennas, including the same operating frequency band, and the third antenna unit 153 and the fourth antenna unit 154 may be same-frequency antennas, including the same operating frequency band. For example, the working frequency band of the first antenna unit 151 and the working frequency band of the second antenna unit 152 may both include the 2.4G frequency band of WiFi. The working frequency band of the third antenna unit 153 and the working frequency band of the fourth antenna unit 154 may both include the 5G frequency band of WiFi.

Figures 13 to 17 are simulation result diagrams of the multiple antenna units shown in Figure 12. Among them, Figure 13 is the simulation result of S parameters of multiple antenna units. Figure 14 is the simulation result of the radiation efficiency of multiple antenna units. Figure 15 is the simulation result of the isolation between multiple antenna units. Figure 16 is the simulation result of ECC between the first antenna unit and the second antenna unit. Figure 17 is the simulation result of ECC between the third antenna unit and the fourth antenna unit.

It should be understood that the embodiment of the present application only includes the operating frequency band of the first antenna unit and the operating frequency band of the second antenna unit. The 2.4G frequency band of WiFi, the working frequency band of the third antenna unit and the working frequency band of the fourth antenna unit include the 5G frequency band of WiFi as an example for explanation. The first antenna unit and the second antenna unit have the same structure, and the third antenna unit and the fourth antenna unit have the same structure. The housing of the electronic device is cylindrical (in practical applications, it can be adjusted according to the needs of the electronic device, for example, it can be rectangular or irregular, and the embodiments of the present application do not limit this), with a diameter of 100mm and a height of 170mm. , the thickness of the metal layer of the housing is 0.5mm (for example, the thickness of the metal layer of the first surface is 0.5mm). The distance between the partition and the first surface is 8 mm. The length (arc length) of the first gap is 30.5mm, and the width is 2.1mm. The length (arc length) of the second gap is 30.5mm, and the width is 1mm. The length of the third gap is 7mm and the width is 0.5mm.

As shown in Figure 13, the first antenna unit (S11) and the second antenna unit (S22) can resonate at 2443MHz and 2445MHz respectively, allowing the working frequency band of the electronic device to include the WiFi 2.4G frequency band. The third antenna unit (S33) and the fourth antenna unit (S44) can resonate at 5564MHz and 5568MHz respectively, allowing the working frequency band of the electronic device to include the 5G frequency band of WiFi.

In addition, the first antenna unit and the second antenna unit can resonate near 3926 MHz, and this resonance can be used to expand the operating frequency band of the first antenna unit and the second antenna unit so that they can operate in more communication frequency bands.

As shown in Figure 14, when the first antenna unit and the second antenna unit are small in size (the length of the first slit and the second slit are 30.5 mm), the radiation efficiency in the operating frequency band is still greater than -2dB. The radiation efficiency of the third antenna unit and the fourth antenna unit in the working frequency band is also greater than -2dB.

As shown in Figure 15, there is good isolation between the first antenna unit, the second antenna unit, the third antenna unit and the fourth antenna unit, and the isolation is greater than 25dB in each frequency band. For example, in the 2.4G frequency band of WiFi, the isolation between the first antenna unit and the second antenna unit is greater than 25dB. In the 5G frequency band of WiFi, the isolation between the third antenna unit and the fourth antenna unit is greater than 43dB.

As shown in Figure 16, the ECC between the first antenna unit and the second antenna unit is less than 1%, and the correlation between the first antenna unit and the second antenna unit is small. When the first antenna unit and the second antenna unit are used in a MIMO system, since the correlation between the first antenna unit and the second antenna unit is small, the information received by the first antenna unit and the second antenna unit is not similar. , the amount of information that the MIMO system can receive increases to increase the reception rate of the MIMO system.

As shown in Figure 17, the ECC between the third antenna unit and the fourth antenna unit is less than one ten thousandth, and the correlation between the third antenna unit and the fourth antenna unit is small. When the third antenna unit and the fourth antenna unit are used in a MIMO system, since the correlation between the third antenna unit and the fourth antenna unit is small, the information received by the third antenna unit and the fourth antenna unit is not similar. , the amount of information that the MIMO system can receive increases to increase the reception rate of the MIMO system.

18 and 19 are simulation diagrams of the first antenna unit in the electronic device shown in FIG. 12 . Among them, FIG. 18 is a top view of the three-dimensional pattern of the first antenna unit. FIG. 19 is a directional diagram of the first antenna unit on the horizontal plane (xoy plane).

As shown in Figures 18 and 19, the directional pattern generated by the first antenna unit tends to be isotropic and has a low directivity coefficient, D=2.4dBi. Multiple electric field zero-point areas are not generated in the pattern generated by the first antenna unit. At the same time, the 3dB beam width of the first antenna unit on the horizontal plane is 270°, which can achieve better beam coverage.

As shown in (a) in Figure 20, it is the pattern generated by the first antenna unit. Its maximum radiation direction is in the x direction. Since the first antenna unit has a low directivity coefficient and the 3dB lobe width is greater than 180° , which can cover the positive area of the x-axis.

As shown in (b) in Figure 20, it is the pattern generated by the second antenna unit. Its maximum radiation direction is the -x direction, given by The first antenna unit has a low directivity coefficient and a 3dB lobe width greater than 180°, which can cover the negative x-axis area.

Therefore, the first antenna unit and the second antenna unit can be switched through a switch (for example, when the intensity of the electrical signal received by the first antenna unit is lower than the first threshold (the first threshold can be a preset value, which can be based on the actual design Adjust) and switch to the second antenna unit), as shown in (c) in Figure 20, thereby realizing switching of the directional pattern so that the electronic device can receive electrical signals from different directions and improve the communication performance of the electronic device.

Figures 21 and 22 are the composite pattern of two antenna elements. Among them, Figure 21 is a composite pattern of the first antenna unit and the second antenna unit. Figure 22 is a composite pattern of the third antenna unit and the fourth antenna unit.

As shown in Figure 21, it is the composite pattern of the first antenna unit and the second antenna unit, and the pattern is symmetrical. In the synthesized pattern, the maximum value of the gain on the horizontal plane is 1.97dBi, the minimum value of the gain is 1.02i, and the out-of-roundness (the difference between the maximum value and the minimum gain value) of the synthesized pattern is 0.95dBi.

As shown in Figure 22, it is the composite pattern of the third antenna unit and the fourth antenna unit, and the pattern is symmetrical. In the synthesized pattern, the out-of-roundness (the difference between the maximum value and the minimum value of the gain) of the synthesized pattern is 0.6dBi, which is better than the synthesized pattern of the first antenna unit and the second antenna unit.

It should be understood that the out-of-roundness of the antenna system on the horizontal plane is an important indicator of the quality of the pattern, and needs to reach 3dB in most applications. For example, in systems with limited equivalent isotropically radiated power (EIRP) power, such as drone application scenarios, there are very strict requirements for the roundness of the pattern of the antenna unit in the horizontal plane. Giving it good communication performance in all directions.

For a closed metal shell, the 3dB lobe width of the antenna unit is narrow due to the shielding of the shell. Generally, at least four antenna elements (each with a 3dB beam width of approximately 90°) are required to construct a horizontal plane pattern with less than 3dB out-of-roundness. The antenna unit provided by the embodiment of the present application has a low directivity coefficient, the 3dB beam width can reach 270° (much larger than 180°), and it can produce horizontal omnidirectional (out-of-roundness less than 3dB) using only two antenna units. ) direction diagram.

It should be understood that the difference between the electronic device shown in FIG. 23 and the electronic device shown in FIG. 12 is only in the working frequency band of the antenna unit.

As shown in FIG. 23 , the electronic device 200 may include an antenna unit 201 , an antenna unit 202 , an antenna unit 203 and an antenna unit 204 . Among them, the structures of the four antenna units are the same, and the working frequency bands of the antenna unit 201, the antenna unit 202, the antenna unit 203 and the antenna unit 204 all include the 5G frequency band of WiFi.

As shown in Figure 24, it is a composite pattern of the antenna unit 201 and the antenna unit 203. It should be understood that the antenna unit provided by the embodiment of the present application has a better 3dB beam width. In weaker (lower gain) reception directions, e.g., around 0° and 270 (in the composite pattern shown in Figure 24), only one antenna element is obscured (e.g., at 0°, antenna element 202 blocked), other antenna units have good radiation fields. Therefore, high gain can be achieved through the above four antenna units. For example, the improved gain can be estimated from the average gain of the antenna unit and the unobstructed antenna units (10log (number of unobstructed antenna units) + the average gain of the antenna unit = 10log3 + 2.3 = 4.77 + 2.3 ≈ 7dBi).

It should be understood that this application only takes four antenna units as an example for explanation. In actual applications, it can be adjusted according to the layout in the electronic device, and this application does not limit this.

Those skilled in the art may use different methods to implement the described functionality for each specific application, but such implementations should not be considered to be beyond the scope of this application.

Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be described again here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical or other forms.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application. should be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

An electronic device, characterized by including:

A metal shell, including a first surface and a second surface arranged oppositely, and a side connecting the first surface and the second surface;

A metal partition located within the housing and parallel to the first surface;

A first back plate is located in the housing and forms a first cavity with the first surface, the partition and the side;

A first antenna unit including the first cavity;

Wherein, a first slit, a second slit and a third slit are provided on the first surface and side surfaces surrounding the first cavity;

One end of the third slit is connected to the first slit, and the other end of the third slit is connected to the second slit;

The extending direction of the first slit or the extending direction of the second slit is perpendicular to a first direction, and the first direction is a direction perpendicular to the first surface.
The electronic device according to claim 1, wherein the interior of the housing is divided into a second cavity and a third cavity by the partition.
The electronic device according to claim 1 or 2, wherein the first slit is located on the first surface, and the second slit is located on the side surface.
The electronic device according to any one of claims 1 to 3, wherein the first slit, the second slit and the third slit form an I-shaped slit structure or a C-shaped slit structure.
The electronic device according to any one of claims 1 to 4, characterized in that the length of the first gap and the length of the second gap are different.
The electronic device according to any one of claims 1 to 5, wherein the distance between the partition and the first surface is less than or equal to 8 mm.
The electronic device according to any one of claims 1 to 6, wherein the distance between the partition and the first surface is less than or equal to 4 mm.
The electronic device according to any one of claims 1 to 7, characterized in that:

The first antenna unit includes a feeding branch;

The feed branch is located in the first cavity, and a feed point is provided at a first end of the feed branch. The feed point is used to feed electrical signals.
The electronic device according to claim 8, wherein the second end of the feed branch is connected to the side surface.
The electronic device according to claim 8 or 9, characterized in that:

The first cavity includes a first dielectric layer and a second dielectric layer;

The feeding branch is located between the first dielectric layer and the second dielectric layer.
The electronic device according to any one of claims 1 to 10, characterized in that the 3dB lobe width of the pattern generated by the first antenna unit is greater than or equal to 180°.
The electronic device according to any one of claims 1 to 11, characterized in that the electronic device further includes:

A second back plate is located in the housing and forms a fourth cavity with the first surface, the partition and the side;

a second antenna unit including the fourth cavity;

Wherein, a fourth slit, a fifth slit and a sixth slit are provided on the first surface and side surfaces surrounding the fourth cavity;

One end of the sixth slit is connected to the fourth slit, and the other end of the sixth slit is connected to the fifth slit;

The extension direction of the fourth slit or the extension direction of the fifth slit is perpendicular to the first direction.
The electronic device according to claim 12, characterized in that:

The first distance and the second distance between the first antenna unit and the second antenna unit are the same;

Wherein, the first distance is the distance in the clockwise direction along the side between the first antenna unit and the second antenna unit, and the second distance is the distance between the first antenna unit and the second antenna unit. Two antenna elements are spaced apart along the side in a counterclockwise direction.
The electronic device according to claim 12 or 13, characterized in that:

The working frequency band of the first antenna unit includes the 2.4G frequency band of wireless fidelity WiFi, or the 5G frequency band of WiFi; and/or,

The working frequency band of the second antenna unit includes the 2.4G frequency band of wireless fidelity WiFi, or the 5G frequency band of WiFi.
The electronic device according to any one of claims 12 to 14, characterized in that the electronic device further includes:

a third antenna unit and a fourth antenna unit;

Wherein, the third antenna unit is located between the first antenna unit and the second antenna unit;

The second antenna unit is located between the third antenna unit and the fourth antenna unit.
The electronic device according to claim 15, characterized in that:

The working frequency band of the first antenna unit and the working frequency band of the second antenna unit both include the 2.4G frequency band of WiFi; and/or,

The working frequency band of the third antenna unit and the working frequency band of the fourth antenna unit both include the 5G frequency band of WiFi.
The electronic device according to any one of claims 1 to 16, characterized in that:

The electronic device is any one of Bluetooth speakers, customer front-end equipment (CPE), routers, smart screens or drones.