CN113555692B

CN113555692B - Electronic equipment

Info

Publication number: CN113555692B
Application number: CN202010328504.1A
Authority: CN
Inventors: 赖奔; 申云鹏; 马宁; 王汉阳
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-04-23
Filing date: 2020-04-23
Publication date: 2023-02-03
Anticipated expiration: 2040-04-23
Also published as: WO2021213126A1; CN113555692A

Abstract

An embodiment of the present application provides an electronic device, including: the metal piece comprises a first feeding unit and a second feeding unit; the metal piece is provided with a first gap and a second gap which are connected with each other, and the first gap is connected with one end of the second gap; a first feeding point is arranged on the first gap, and the first feeding unit is indirectly coupled and fed at the first feeding point; and a second feeding point is arranged on the second gap, and the second feeding unit is directly coupled and fed at the second feeding point. According to the technical scheme of the embodiment of the application, when the feeding unit feeds at the corresponding feeding point, the slot structure can form a common dual-antenna structure. In the structure of the slot antenna, two high-isolation resonances can be generated and work in the same frequency band. The high-isolation antenna can be designed in a compact space of electronic equipment to realize high isolation among multiple antennas, and the scene requirement that part of same-frequency antennas work simultaneously is met.

Description

Electronic equipment

Technical Field

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

Background

With the rapid development of wireless communication technology, in the past, second generation (2G) mobile communication systems mainly support a call function, electronic devices are only tools for people to receive and transmit short messages and voice communication, and the wireless internet access function is very slow because data transmission is transmitted by using a voice channel. Nowadays, electronic devices are used for on-line listening to music, watching network movies, real-time videos, etc. in addition to calling, sending short messages and taking pictures, and cover various applications such as people's communication, video entertainment, and electronic commerce, etc. in which various functional applications require wireless network to upload and download data, and therefore, high-speed transmission of data becomes very important.

With the demand for high-speed data transmission, how to effectively increase the transmission rate of electronic devices under limited bandwidth is an important research topic, a multiple-input multiple-output (MIMO) multi-antenna system is one of the main core technologies at present, and the MIMO multi-antenna system greatly increases the transmission rate by increasing the number of antennas at the transmitting end and the receiving end and simultaneously performing data transmission and reception. However, due to the size limitation of electronic equipment, the antenna layout is more and more compact, which results in the increasingly poor isolation between antennas in the same frequency band. Meanwhile, the simultaneous operation can be realized only when the isolation requirement among the antennas with the same frequency is high. For example, about 40dB isolation is required for simultaneous operation of an antenna operating in the wireless fidelity (WiFi) band and an antenna operating in the Bluetooth (BT) band. Therefore, the demand for high-isolation antennas disposed at a close distance is becoming significant.

Disclosure of Invention

The embodiment of the application provides electronic equipment which can comprise a multi-antenna structure with shared separate feeding. The slot structure may form a common multi-antenna when the feeding unit feeds at the feeding point. In the structure of the slot antenna, high-isolation resonance can be generated and the slot antenna can work in the same frequency band. The high isolation among multiple antennas can be designed and realized in the compact space of the electronic equipment, and the scene requirement that partial same-frequency antennas work simultaneously is met.

In a first aspect, an electronic device is provided, which includes: the metal piece comprises a first feeding unit and a second feeding unit; the metal piece is provided with a first gap and a second gap which are communicated with each other, and the first gap is connected with one end of the second gap; a first feeding point is arranged on the first slot, and the first feeding unit is indirectly coupled and fed at the first feeding point; and a second feeding point is arranged on the second slot, and the second feeding unit is directly coupled and fed at the second feeding point.

According to the technical scheme of the embodiment of the application, when the first feeding unit feeds power at the first feeding point and the second feeding unit feeds power at the second feeding point, the slot structure can form a combined double-antenna structure. In the structure of the slot antenna, two high-isolation resonances can be generated and work in the same frequency band. The high-isolation antenna can be designed in a compact space of electronic equipment to realize high isolation among multiple antennas, and the scene requirement that part of same-frequency antennas work simultaneously is met.

With reference to the first aspect, in certain implementations of the first aspect, the first feeding point is disposed at a connection of the first slot and the second slot.

According to the technical scheme of the embodiment of the application, the slot antenna provided by the embodiment of the application has better radiation performance. The first feeding point may be disposed at a middle position of the first slot, and equally divide the length of the first slot into two slots having the same length. Alternatively, the first feeding point may be disposed within a range of a certain distance to the left and right of the middle position of the first slot.

With reference to the first aspect, in certain implementations of the first aspect, the first slit and the second slit form a T-shaped slit.

According to the technical scheme of the embodiment of the application, when the first feeding unit and the second feeding unit feed power, although electric fields on the first gap are overlapped, the electric fields are orthogonal to each other in integral mode. Therefore, the isolation between the first feeding point and the second feeding point is high, and the scene requirement of simultaneous working of the same-frequency antennas can be met.

With reference to the first aspect, in certain implementations of the first aspect, the first slit is ring-shaped.

According to the technical scheme of the embodiment of the application, various structural changes can be provided for the design scheme of the slot antenna provided by the embodiment of the application.

With reference to the first aspect, in certain implementations of the first aspect, the electronic device further includes: a third feeding unit; the metal piece is also provided with a third gap, and the third gap is connected with the other end of the second gap; and a third feeding point is arranged on the third slot, and the third feeding unit is indirectly coupled and fed at the third feeding point.

According to the technical scheme of the embodiment of the application, the resonance generated by the feeding unit when feeding is carried out at the first feeding point and the third feeding point can be applied to the MIMO system working in the WiFi frequency band, and the resonance generated by the feeding unit when feeding is carried out at the second feeding point can meet the requirement of the BT frequency band. The MIMO antenna of the WiFi frequency band and the antenna of the BT frequency band can be independently arranged in the same electronic device, so that the condition that the WiFi of the electronic device is disconnected due to excessive Bluetooth peripherals is effectively avoided, and the user experience is improved.

With reference to the first aspect, in certain implementation manners of the first aspect, a grounding point is further disposed on the second slot, and the grounding point is disposed between the second feeding point and one end of the second slot close to the first slot.

According to the technical scheme of the embodiment of the application, better radiation performance can be brought to the slot antenna.

With reference to the first aspect, in certain implementations of the first aspect, a fourth gap is further disposed on the metal piece, and the fourth gap is connected to the second gap; the fourth slot is disposed between the second feeding point and the first slot.

According to the technical scheme of the embodiment of the application, the fourth gap is arranged on the metal piece, so that the length of the second gap can be effectively reduced, the structure of the slot antenna is more compact, and the occupied area of the slot antenna is reduced.

With reference to the first aspect, in certain implementation manners of the first aspect, a fifth gap is further disposed on the metal piece, and the fifth gap is connected to the second gap; the second feeding point is disposed between the fourth slot and the fifth slot.

According to the technical scheme of the embodiment of the application, the second feeding point is arranged between the fourth gap and the fifth gap, so that the distance between the second feeding point and one end, far away from the first gap, of the second gap is increased, and the second feeding unit can be matched at the second feeding point conveniently.

With reference to the first aspect, in certain implementations of the first aspect, the first slot and the second slot form a slot antenna; the length of the first slot is one half of the wavelength corresponding to the resonance point of the resonance generated by the slot antenna; the length of the second slot is one quarter of the wavelength corresponding to the resonance point of the resonance generated by the slot antenna.

According to the technical scheme of the embodiment of the application, the parameters of the gap can be correspondingly adjusted according to actual design requirements.

With reference to the first aspect, in certain implementations of the first aspect, the metal piece is a rear cover of the electronic device.

According to the technical scheme of the embodiment of the application, the metal piece can be a rear cover of the electronic equipment, so that the complexity of the antenna structure can be further reduced.

With reference to the first aspect, in certain implementations of the first aspect, the rear cover of the electronic device is further covered with an insulating material, where the insulating material includes glass, leather, ceramic, plastic, and resin.

According to the technical scheme of this application embodiment, the back lid of electronic equipment can produce the oxidation after long-time the use, consequently, can set up insulating material on the back lid surface of metal, promote user experience.

With reference to the first aspect, in certain implementations of the first aspect, the electronic device further includes an antenna support, and the metal piece is disposed on a surface of the antenna support.

According to the technical scheme of the embodiment of the application, the metal piece can be a metal layer arranged on the surface of the antenna support, and various antenna design schemes are provided.

With reference to the first aspect, in certain implementations of the first aspect, the first slot and the second slot form a slot antenna; the working frequency band of the slot antenna covers a WiFi frequency band or a BT frequency band.

According to the technical scheme of the embodiment of the application, the antenna of the WiFi frequency band and the antenna of the BT frequency band can be independently arranged in the same electronic equipment, the situation that the WiFi of the electronic equipment is disconnected due to the fact that the number of Bluetooth peripherals is too large is effectively avoided, and user experience is improved.

With reference to the first aspect, in certain implementations of the first aspect, the electronic device further includes at least one inverted-F antenna; the first slot and the second slot are arranged along the edge of one side of the electronic equipment, and the at least one inverted-F antenna is arranged along the edge of any one of the rest three sides of the electronic equipment.

According to the technical scheme of the embodiment of the application, the conventional antenna and the slot antenna provided by the embodiment of the application can be used for realizing independent antennas working in a WiFi frequency band and antennas working in a BT frequency band in the electronic equipment. It should be understood that the electronic device may also include any one of the structures of the slot antenna in the embodiments of the present application, which can achieve the above-mentioned effects, and the present application does not limit this.

Optionally, the electronic device may comprise at least one slot antenna. The slot antenna may be composed of the first slot and the second slot, or the first slot, the second slot and the third slot, or the first slot, the second slot and the fourth slot, or the first slot, the second slot, the fourth slot and the fifth slot.

The electronic device may include: a first slot antenna, a second slot antenna, and a third slot antenna. The first slot antenna may be disposed at an edge of a bottom short side of the electronic device, and the second slot antenna and the third slot antenna may be disposed at an upper half portion of the electronic device.

The first slot antenna may be disposed at an edge of a short side of the bottom of the electronic device, and the second slot antenna and the third slot antenna may be disposed at an upper half portion of the electronic device.

The first slot antenna can independently work in a BT frequency band, and the second slot antenna and the third slot antenna can be applied to a MIMO system working in a WiFi frequency band.

With reference to the first aspect, in some implementations of the first aspect, when the first feeding unit feeds at the first feeding point, antenna radiation formed by the first slot and the second slot generates a first directional pattern; when the second feeding unit feeds power at the second feeding point, the antenna radiation formed by the first slot and the second slot generates a second directional diagram; the first directional pattern is complementary to the second directional pattern.

According to the technical scheme of the embodiment of the application, the electronic equipment can select the antenna formed by the feed point with better radiation performance in the slot antenna as the antenna working in the WiFi frequency band. The remaining feed points form an antenna that can operate in the BT band. It should be understood that the slot antenna in the embodiments provided in the present application can achieve this effect.

Drawings

Fig. 1 is a schematic view of an electronic device provided in an embodiment of the present application.

Fig. 2 is a schematic structural diagram of an antenna arrangement in an electronic device.

Fig. 3 is a schematic structural diagram of a slot antenna according to an embodiment of the present application.

Fig. 4 is a simulation result of S-parameters of the antenna structure shown in fig. 3.

Fig. 5 is an electric field distribution diagram of the slot antenna when the first feeding unit feeds power.

Fig. 6 is an electric field distribution diagram of the slot antenna when the second feeding unit feeds.

Fig. 7 is a schematic structural diagram of another slot antenna provided in an embodiment of the present application.

Fig. 8 is a simulation result of S-parameters of the antenna structure shown in fig. 7.

Fig. 9 is a schematic structural diagram of another slot antenna provided in an embodiment of the present application.

Fig. 10 is a simulation result of S-parameters of the antenna structure shown in fig. 9.

Fig. 11 is a schematic structural diagram of another slot antenna provided in an embodiment of the present application.

Fig. 12 is a cross-sectional view of an electronic device provided by an embodiment of the application.

Fig. 13 is a simulation result of S-parameters of the antenna structure shown in fig. 11.

Fig. 14 is a schematic structural diagram of another slot antenna provided in an embodiment of the present application.

Fig. 15 is a schematic structural diagram of an electronic device provided in an embodiment of the present application.

Fig. 16 is a result of S-parameter simulation between the antennas shown in fig. 15.

Fig. 17 is a schematic surface current distribution diagram provided in the embodiment of the present application.

Fig. 18 is a schematic structural diagram of an electronic device provided in an embodiment of the present application.

Fig. 19 is a result of S-parameter simulation between the antennas shown in fig. 18.

Fig. 20 is a schematic structural diagram of a feeding scheme of an antenna provided in an embodiment of the present application.

Fig. 21 is a schematic diagram of a matching network according to an embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The electronic device in the embodiment of the application can be a mobile phone, a tablet computer, a notebook computer, an intelligent bracelet, an intelligent watch, an intelligent helmet, intelligent glasses and the like. 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 handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a terminal device in a 5G network, or a terminal device in a Public Land Mobile Network (PLMN) for future evolution, and the like, which are not limited in this embodiment.

Fig. 1 is a schematic view of an electronic device provided in an embodiment of the present application, and the electronic device is herein described as a tablet computer.

As shown in fig. 1, the electronic device has a cubic shape, and may include a frame 10 and a display screen 20, where the frame 10 and the display screen 20 may be mounted on a middle frame (not shown in the figure), the frame 10 may be divided into an upper frame, a lower frame, a left frame, and a right frame, and the frames are connected to each other, and a certain arc or chamfer may be formed at the connection point.

The electronic device further includes a Printed Circuit Board (PCB) disposed inside, and electronic components may be disposed on the PCB and include, but are not limited to, a capacitor, an inductor, a resistor, a processor, a camera, a flash, a microphone, a battery, and the like.

The frame 10 may be a metal frame, such as a metal frame made of copper, magnesium alloy, stainless steel, etc., a plastic frame, a glass frame, a ceramic frame, etc., or a frame made of metal and plastic.

In the prior art, the WiFi frequency band and the BT frequency band are of the same frequency, and both the WiFi frequency band and the BT frequency band have very high sensitivity requirements, and in order to ensure normal operation of an antenna working in the WiFi frequency band and an antenna working in the BT frequency band, both use the same antenna, and adopt a time-division duplex (TDD) mode. However, with the increase of external devices of the electronic device, such as a bluetooth speaker, a bluetooth mouse, a bluetooth keyboard, etc., the service time of the WiFi frequency band is continuously compressed, which may cause a network-off condition and affect user experience. Therefore, it is necessary to separately provide an antenna operating in the WiFi band and an antenna operating in the BT band. But the isolation between partial same-frequency antennas is high to realize simultaneous operation, and the isolation between the two antennas needs about 40dB.

As shown in fig. 2, the electronic device may include an antenna 11 and an antenna 12.

Conventional inter-antenna isolation enhancement is often achieved by distance pulling. As shown in fig. 2, a large-sized electronic device, such as a 10-inch tablet computer, is used. The antennas 11 and 12 may be conventional inverted-F antennas (IFAs), and in order to improve the isolation between the two antennas, the antennas may be pulled farthest by the layout arrangement, that is, the antennas 11 and 12 are disposed along opposite corners of the electronic device, but the isolation between the two antennas is still less than 30dB.

The embodiment of the application provides a design scheme for designing multiple antennas by adopting a common body separated feed of a closed gap structure with branches, which can realize high isolation among the multiple antennas in a compact space of electronic equipment and meet the scene requirement of simultaneous working of part of same-frequency antennas.

Fig. 3 is a schematic structural diagram of a slot antenna provided in the embodiment of the present application, and the slot antenna structure provided in the embodiment of the present application may be applied to an electronic device.

The electronic device may include: a metal piece 110, a first power feeding unit 120 and a second power feeding unit 130.

The metal member 110 is provided with a first slit 140 and a second slit 150 which are communicated with each other, and one end of the first slit 140 is connected with one end of the second slit 150. The first slot 140 and the second slot 150 form a slot antenna. The first slot 140 is provided with a first feeding point 141, and the first feeding unit 120 indirectly couples and feeds the slot antenna at the first feeding point. A second feeding point 151 is disposed on the second slot 150, and the second feeding unit 130 directly couples and feeds the slot antenna at the second feeding point 151. The feeding point can be regarded as an area, and when the feeding unit feeds power, voltage can be loaded at two ends of the gap corresponding to the feeding point.

It is to be understood that indirect coupling is a concept opposite to direct coupling, i.e. space coupling, without a direct electrical connection between the two. Whereas direct coupling is a direct electrical connection, feeding directly at the feeding point.

Optionally, the electronic device may further include a first metal dome 160, and the first feeding unit 120 may implement indirect coupling feeding of the slot antenna at the first feeding point 141 by being electrically connected to the first metal dome 160.

Alternatively, one end of the second slit 150 may be an end distance of the second slit 150 from the end point, and not a point.

Alternatively, the first feeding unit 120 and the second feeding unit 130 may be the same feeding unit. For example, the first feeding unit 120 and the second feeding unit 130 may correspond to different rf channels in a power supply chip.

It should be understood that to implement an indirectly coupled feed structure in a slot antenna structure, a metal patch may also be designed on the PCB of the electronic device. Because set up the metal paster on PCB after, the distance grow between metal paster and the gap, consequently can corresponding increase coupling area, also can realize same effect. The application does not limit the way in which the feeds are indirectly coupled.

Alternatively, the length of the first slot 140 may be about one-half of the wavelength corresponding to the resonance point of the resonance generated by the slot antenna; the length of the second slot 150 may be about a quarter of the wavelength corresponding to the resonance point of the resonance generated by the slot antenna.

It should be understood that the resonance generated by the slot antenna may be a resonance generated by the slot antenna when the first feeding unit 120 feeds power, or may also be a resonance generated by the slot antenna when the second feeding unit 130 feeds power.

Alternatively, when the first feeding unit 120 and the second feeding unit 130 feed, the slot antenna generates two resonances, and the operating bandwidth generated by each resonance can cover the WiFi band or the uo or BT band.

Alternatively, the first feeding point may be disposed at a connection of the first slot 140 and the second slot 150.

Optionally, the first and

second slots

140, 150 form a T-shaped slot. The connection point of the first slot 140 and the second slot 150 may divide the length of the first slot 140 into equal parts, that is, the connection point of the first slot 140 and the second slot 150 may divide the T-shaped slot into three slots with the same length, and the length of each slot is one quarter of the wavelength corresponding to the resonance point of the resonance generated by the slot antenna.

Alternatively, the first feeding point 141 may be disposed at a middle position of the first slot 140, and equally divide the length of the first slot 140 into two slots having the same length. Alternatively, the first feeding point may be disposed within a range of a certain distance to the left and right of the middle position of the first slot.

Alternatively, the first feeding point 141 may be provided. The first slit 140 is connected to the second slit 150.

Optionally, the metal part 110 is a rear cover of the electronic device. It should be understood that the rear cover of the electronic device may be partially made of metal and partially made of non-metal, and may be designed according to specific requirements. The application does not limit the position, and only the part where the slot antenna is located needs to be guaranteed to be made of metal.

Optionally, the rear cover of the electronic device is further covered with an insulating material, including glass, leather, ceramic, plastic, or resin. The back lid of electronic equipment can produce the oxidation after long-time the use, consequently, can set up insulating material on the back lid surface of metal, increases the wearability behind the electronic equipment, promotes user experience.

Optionally, the electronic device further includes an antenna support, the antenna support may be disposed inside the electronic device, that is, between the rear cover and the screen, and the metal component 110 may be a metal layer disposed on a surface of the antenna support.

Optionally, when the metal piece 110 is a rear cover of the electronic device, the electronic device may further include an antenna support, and the feeding unit may indirectly couple and feed the slot antenna through the antenna support.

The embodiment of the application provides a design scheme of a common body separated feeding dual antenna. The slot structure may form a common dual antenna structure when the first feeding unit feeds at the first feeding point and the second feeding unit feeds at the second feeding point. In the structure of the slot antenna, two high-isolation resonances can be generated and work in the same frequency band. The high-isolation antenna can be designed in a compact space of electronic equipment to realize high isolation among multiple antennas, and the scene requirement that part of same-frequency antennas work simultaneously is met.

As shown in fig. 4, the operating band of the slot antenna may cover the WiFi band and the BT band. The isolation between the first feeding point and the second feeding point is greater than 40dB in the working frequency band. The antenna of the WiFi frequency band and the antenna of the BT frequency band can be independently arranged in the same electronic device, so that the condition that WiFi of the electronic device is disconnected due to excessive Bluetooth peripherals is effectively avoided, and the user experience is improved.

It should be understood that, for simplicity of introduction, only the WiFi frequency band and the BT frequency band with the same frequency are taken as examples, and the technical solution of the embodiment of the present application may also be applied to other scenarios where high isolation is required.

Fig. 5 and 6 are schematic diagrams of electric field distributions provided by embodiments of the present application. Fig. 5 is an electric field distribution diagram of the slot antenna when the first feeding unit feeds power, and fig. 6 is an electric field distribution diagram of the slot antenna when the second feeding unit feeds power.

As shown in fig. 5 and 6, when the first feeding unit and the second feeding unit feed, although the electric fields on the first slits coincide, the electric fields are quadrature with each other in integral. Therefore, the isolation between the first feeding point and the second feeding point is high, and the scene requirement of simultaneous working of the same-frequency antennas can be met.

As shown in fig. 7, the first slit 140 may have a ring shape.

Alternatively, the width D1 of the first slit 140 may be 1mm.

Alternatively, the width D2 of the second slit 150 may be 1mm.

Alternatively, the diameter D3 of the first slit 140 forming a ring shape may be 36mm.

Alternatively, the length D4 of the second slit 150 may be 12.01mm.

It should be understood that the present application is not limited to the specific parameters corresponding to the first slit 140 or the second slit 150, and may be determined according to actual design or simulation.

As shown in fig. 8, the operating band of the slot antenna may cover the WiFi band and the BT band. Since the electric fields generated at the first slot coincide and are orthogonal to each other when the first and second feeding units feed. Thus, the isolation between the first feeding point and the second feeding point is greater than 40dB in the operating frequency band. Satisfy in same electronic equipment, the antenna of wiFi frequency channel and the antenna of BT frequency channel can independently set up, have effectively avoided electronic equipment because the too many circumstances that arouse of wiFi that arouse of bluetooth peripheral hardware drop, promote user experience.

As shown in fig. 9, the electronic apparatus further includes: and a third feeding unit 220.

The metal member 110 is further provided with a third gap 210, and the third gap 210 is connected to the other end of the second gap 150 and is communicated with the second gap 150. The first slot 140, the second slot 150 and the third slot 210 form a slot antenna. A third feeding point 211 is disposed on the third slot 210, and the third feeding unit 220 may be indirectly coupled to feed at the third feeding point 211.

Optionally, a grounding point 152 is further disposed on the second slot 150, and may be disposed between the second feeding point 151 and an end of the second slot 150 close to the first slot 140, and the slot antenna may be grounded at the grounding point 152.

Optionally, the electronic device may further include a second metal dome 2300, and the third feeding unit 220 may realize indirect coupling feeding of the slot antenna at the third feeding point 211 by being electrically connected to the second metal dome 230.

Optionally, the first slot 140, the second slot 150 and the third slot 210 form a drum slot. The connection point of the first slot 140 and the second slot 150 may equalize the length of the first slot 140, and the connection point of the third slot 210 and the second slot 150 may equalize the length of the third slot 210. That is, the connection point of the first slot 140 and the second slot 150 and the connection point of the third slot 210 and the second slot 150 may divide the slot into five slots having the same length, each of which is a quarter of the wavelength corresponding to the resonance point of the resonance generated by the slot antenna.

Alternatively, the slot antenna generates three resonances when the first, second and

third feeding units

120, 130 and 220 feed. The working bandwidth generated by each resonance can cover a WiFi frequency band or a uo frequency band or a BT frequency band.

It should be understood that the slot structure may form a common multi-antenna structure when the feeding unit feeds at the respective feeding points. The high-isolation antenna can be designed in a compact space of electronic equipment to realize high isolation among multiple antennas, and the scene requirement that part of same-frequency antennas work simultaneously is met.

As shown in fig. 10, the operating band of the slot antenna may cover the WiFi band and the BT band.

Since the electric fields generated at the first slot coincide and are orthogonal to each other when the first and second feeding units feed. Thus, the isolation between the first feeding point and the second feeding point is greater than 40dB in the operating frequency band.

Since the electric fields generated at the third slot coincide and are orthogonal to each other when the third feeding unit and the second feeding unit feed. Thus, the isolation between the third feeding point and the second feeding point is greater than 40dB in the operating frequency band.

Therefore, the resonance generated by the feeding unit when feeding at the first feeding point and the third feeding point can be applied to the MIMO system operating in the WiFi frequency band, and the resonance generated by the feeding unit when feeding at the second feeding point can meet the requirement of the BT frequency band. The MIMO antenna of the WiFi frequency band and the antenna of the BT frequency band can be independently arranged in the same electronic device, so that the condition that WiFi of the electronic device is disconnected due to excessive Bluetooth peripherals is effectively avoided, and the user experience is improved.

As shown in fig. 11, the metal member 110 is further provided with a fourth slot 310, the fourth slot 310 is disposed between the second feeding point 151 and the first slot 140, and the fourth slot 310 is connected to the second slot 150. The first slot 140, the second slot 150 and the fourth slot 310 form a slot antenna. The fourth slit 310 is in communication with the second slit 150.

Optionally, the electronic device may further comprise a baffle 30. When the metal element 110 is a rear cover of an electronic device, the internal structure of the electronic device is as shown in fig. 12. The baffle 30 may be disposed between the display screen 20 and the metal member 110, and is used to protect the slot antenna on the metal member 110 from being interfered by the internal wiring of the electronic device, so as to ensure good radiation characteristics thereof. The distance between the display screen 20 and the metal member 110 may be 4mm, the width of the gap between the baffle 30 and the metal member 110 may be 1mm, and the distance between the display screen 20 and the bezel 10 may be 1.5mm. It is to be understood that distance may be understood as the straight-line distance between the closest points.

Alternatively, the length L1 of the first slit 140 may be 44mm.

Alternatively, the length L2 of the fourth slit 310 may be 38mm.

Alternatively, the distance L3 between the first slit 140 and the fourth slit 310 may be 11mm.

Alternatively, the distance L4 between the connection point of the second slit 150 and the fourth slit 310 and the end of the second slit 150 far from the first slit 140 may be 6mm.

Alternatively, the widths of the first slit 140, the second slit 150, and the fourth slit 310 may each be 1.5mm.

Alternatively, the width L5 and the length L6 of the baffle 30 disposed around the slot antenna may be 20mm and 66mm, respectively.

It should be understood that the application is not limited to the specific parameters corresponding to the gaps, and the specific parameters may be determined according to actual design or simulation.

When the first feeding unit feeds power, the slot antenna radiates to generate a first directional diagram. When the second feeding unit feeds, the slot antenna radiates to generate a second directional diagram. The first directional diagram is complementary to the second directional diagram, so that the electronic device can select an antenna formed by a feeding point with better radiation performance in the slot antenna as an antenna working in a WiFi frequency band. The remaining feed points form an antenna that can operate in the BT band. It should be understood that the slot antenna in the embodiments provided in the present application can achieve this effect.

Because the fourth slot 310 is disposed on the metal member 110, the length of the second slot 150 can be effectively reduced, so that the slot antenna is more compact in structure and occupies a smaller area.

As shown in fig. 13, the operating band of the slot antenna may cover the WiFi band and the BT band. Since the electric fields generated at the first slot coincide and are orthogonal to each other when the first and second feeding units feed. Thus, the isolation between the first feeding point and the second feeding point is greater than 40dB in the operating frequency band. The antenna of the WiFi frequency band and the antenna of the BT frequency band can be independently arranged in the same electronic device, so that the condition that WiFi of the electronic device is disconnected due to excessive Bluetooth peripherals is effectively avoided, and the user experience is improved.

As shown in fig. 14, a fifth slot 410 is further disposed on the metal member 110, a second feeding point may be disposed between the fourth slot 310 and the fifth slot 410, and the fifth slot 410 is connected to the second slot 150. The first slot 140, the second slot 150, the fourth slot 310 and the fifth slot 410 form a slot antenna. The fifth slit 410 is in communication with the second slit 150.

Alternatively, the length H1 of the first slit 140 may be 44mm.

Alternatively, the length H2 of the second slit 150 may be 18mm.

Alternatively, the length H3 of the third slit 310 may be 38mm.

Alternatively, the length H4 of the fourth slit 410 may be 28mm.

Since the second feeding point 151 is disposed between the fourth slot 310 and the fifth slot 410, increasing the distance between the second feeding point 151 and the end of the second slot 150 far from the first slot 140 facilitates the matching of the second feeding unit at the second feeding point 151.

As shown in fig. 15, the electronic device may include at least one slot antenna as shown in fig. 13. For convenience of description, the present embodiment is described by taking three slot antennas as an example, which are the first slot antenna 510, the second slot antenna 520, and the third slot antenna 530, but the number of the slot antennas is not limited.

The first slot antenna 510 may be disposed at the edge of the short side of the bottom of the electronic device, and the second slot antenna 520 and the third slot antenna 530 may be disposed at the upper half of the electronic device. The first slot antenna 510 may be provided with one feeding point each, and the second slot antenna 520 and the third slot antenna 530 may be provided with two feeding points each.

As shown in fig. 16, the isolation between the feeding point of the first slot antenna and the feeding points of the second slot antenna and the third slot antenna is greater than 40dB. Therefore, the first slot antenna can independently work in the BT frequency band, and the second slot antenna and the third slot antenna can be applied to a MIMO system working in the WiFi frequency band.

It will be appreciated that the current distribution of conventional IFA antennas is relatively dispersive, and that with a single IFA antenna located along a diagonal of the electronic device, the isolation between the two antennas is still less than 30dB. The current distribution of the slot antenna that this application embodiment provided is comparatively concentrated, and the current distribution of the first slot antenna that the short side of electronic equipment bottom set up concentrates on the latter half of electronic equipment, and is less to the influence of the first half of electronic equipment, as shown in fig. 17. Accordingly, the arrangement of a plurality of slot antennas can be realized in the electronic device. It should be understood that the electronic device may also include any one of the slot antenna structures in the embodiments described above, and the above effects can be achieved, and the present application is not limited thereto.

As shown in fig. 18, the electronic device may include at least one slot antenna as shown in fig. 13 and a conventional IFA antenna. For convenience of description, the present embodiment is described by taking one slot antenna and two IFA antennas as examples, which are the first antenna 610, the second antenna 620 and the third antenna 630, but the number of the antennas is not limited.

The first antenna 610 is a slot antenna as shown in fig. 13, and the second antenna 620 and the third antenna 630 are conventional IFA antennas. The first antenna 610 may be disposed at a lower edge of a long side of the electronic device, the second antenna 620 may be disposed at an upper edge of the other long side of the electronic device, and the third antenna 630 may be disposed at an edge of the electronic device near a short side of the second antenna 620.

Alternatively, the second antenna 620 and the third antenna 630 may be conventional loop (loop) antennas, left-hand antennas, large IFA antennas, or the like.

As shown in fig. 19, the isolation between the first antenna and the second and third antennas is greater than 40dB. Therefore, the first antenna can independently operate in the BT band, and the second antenna and the third slot can be applied to a MIMO system operating in the WiFi band.

The first antenna may be disposed along an edge of one side of the electronic device, and the second antenna and the third antenna may be disposed along an edge of any of the remaining three sides of the electronic device.

It should be understood that the current distribution of the slot antenna provided in the embodiment of the present application is relatively concentrated, the current distribution of the first antenna disposed at the edge of the long edge of the electronic device is concentrated, and the influence on the second antenna and the third antenna is relatively small. Therefore, the conventional antenna and the slot antenna provided by the embodiment of the application can be used for realizing independent antennas working in the WiFi frequency band and antennas working in the BT frequency band in the electronic device. It should be understood that the electronic device may also include any one of the structures of the slot antenna in the embodiments of the present application, which can achieve the above-mentioned effects, and the present application does not limit this.

Fig. 20 is a schematic structural diagram of a feeding scheme of an antenna according to an embodiment of the present application.

As shown in fig. 20, the metal piece 110 may be a metal layer disposed on an antenna bracket 202 of the electronic device, and the feeding unit may be disposed on a PCB14 of the electronic device, and the feeding unit may be indirectly coupled at a first feeding point through an elastic sheet 201. Or, the elastic sheet 201 may also be directly electrically connected to the metal member 110, and the feeding unit may be directly coupled to the second feeding point through the elastic sheet 201.

Optionally, the metal component 110 may also be a rear cover of the electronic device, and the indirect coupling or the direct coupling is realized through the elastic sheet 201. The elastic piece 201 may be any one of the first metal elastic piece and the second metal elastic piece in the above embodiments.

It should be understood that the technical solution provided in the embodiment of the present application may also be applied to a grounding structure of an antenna, where the antenna is connected to a floor through a spring, and in an electronic device, the floor may be a middle frame or a PCB. The PCB is formed by laminating a plurality of dielectric plates, and a metal coating layer exists in the plurality of dielectric plates and can be used as a reference ground of the antenna.

Alternatively, matching networks may be provided at the respective feed points. The embodiment provided by the application takes the second feeding point as an example for explanation, and a matching network can be arranged at other feeding points

And a network matched with the feed unit is added at each feed point, so that the current of other frequency bands of the feed point can be inhibited, and the overall performance of the antenna is improved.

Alternatively, as shown in fig. 21, the matching network may include a first capacitor connected in series and a second capacitor connected in parallel, and the capacitance values may be 1pF and 0.5pF in sequence. It should be understood that the present application is not limited to the specific form of the matching network, and may also be a series capacitor, a shunt inductor, etc.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one type of logical functional division, and other divisions may be realized in practice, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be an electric or other form.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An electronic device, comprising:

the metal piece comprises a first feeding unit and a second feeding unit;

the metal piece is provided with a first gap and a second gap which are communicated with each other, and the first gap is connected with one end of the second gap;

a first feeding point is arranged on the first gap, and the first feeding unit is indirectly coupled and fed at the first feeding point;

a second feeding point is arranged on the second slot, and the second feeding unit is directly coupled and fed at the second feeding point;

the electronic device further includes:

a third feeding unit;

the metal piece is also provided with a third gap, and the third gap is connected with the other end of the second gap;

and a third feeding point is arranged on the third slot, and the third feeding unit is indirectly coupled and fed at the third feeding point.

2. An electronic device, comprising:

the metal piece comprises a first feeding unit and a second feeding unit;

a second feeding point is arranged on the second gap, and the second feeding unit is directly coupled and fed at the second feeding point;

a fourth gap is further formed in the metal piece and connected with the second gap;

the fourth slot is disposed between the second feeding point and the first slot.

3. The electronic device of claim 1 or 2, wherein the first feeding point is disposed at a junction of the first slot and the second slot.

4. The electronic device of claim 3, wherein the first slot and the second slot form a T-shaped slot.

5. The electronic device of claim 1,

the second gap is also provided with a grounding point, and the grounding point is arranged between the second feeding point and one end of the second gap close to the first gap.

6. The electronic device of claim 2,

the metal piece is also provided with a fifth gap, and the fifth gap is connected with the second gap;

the second feeding point is disposed between the fourth slot and the fifth slot.

7. The electronic device of claim 1 or 2,

the first slot and the second slot form a slot antenna;

the length of the first slot is one half of the wavelength corresponding to the resonance point of the resonance generated by the slot antenna;

the length of the second slot is one quarter of the wavelength corresponding to the resonance point of the resonance generated by the slot antenna.

8. The electronic device according to claim 1 or 2, wherein the metal member is a rear cover of the electronic device.

9. The electronic device of claim 8, wherein the rear cover of the electronic device is further covered with an insulating material, and the insulating material comprises glass, leather, ceramic, plastic, and resin.

10. The electronic device according to claim 1 or 2, wherein the electronic device further comprises an antenna support, and the metal piece is disposed on a surface of the antenna support.

11. The electronic device of claim 1 or 2,

the first slot and the second slot form a slot antenna;

the working frequency band of the slot antenna covers a wireless fidelity WiFi frequency band or a Bluetooth BT frequency band.

12. The electronic device of claim 1 or 2, further comprising at least one inverted-F antenna;

the first slit and the second slit are arranged along the edge of one side of the electronic equipment, and the at least one inverted-F antenna is arranged along the edge of any one of the rest three sides of the electronic equipment.

13. The electronic device of claim 1 or 2,

when the first feeding unit feeds power at the first feeding point, the antenna radiation formed by the first slot and the second slot generates a first directional diagram;

when the second feeding unit feeds power at the second feeding point, the antenna radiation formed by the first slot and the second slot generates a second directional diagram;

the first directional pattern is complementary to the second directional pattern.