WO2024027778A1 - Dispositif électronique - Google Patents

Dispositif électronique Download PDF

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Publication number
WO2024027778A1
WO2024027778A1 PCT/CN2023/110869 CN2023110869W WO2024027778A1 WO 2024027778 A1 WO2024027778 A1 WO 2024027778A1 CN 2023110869 W CN2023110869 W CN 2023110869W WO 2024027778 A1 WO2024027778 A1 WO 2024027778A1
Authority
WO
WIPO (PCT)
Prior art keywords
cavity
radiation
conductive
circuit board
electronic device
Prior art date
Application number
PCT/CN2023/110869
Other languages
English (en)
Chinese (zh)
Inventor
薛孟
张琛
聂成成
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2024027778A1 publication Critical patent/WO2024027778A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/48—Earthing means; Earth screens; Counterpoises
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/10—Resonant slot antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/10—Resonant antennas
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0201—Thermal arrangements, e.g. for cooling, heating or preventing overheating
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/11—Printed elements for providing electric connections to or between printed circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • H05K1/181—Printed circuits structurally associated with non-printed electric components associated with surface mounted components
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body

Definitions

  • the embodiments of the present application relate to the field of terminal technology, and in particular to an electronic device.
  • a cavity antenna may be formed in an electronic device.
  • a radiator is provided above a printed circuit board (PCB)
  • a radio frequency coupling probe is provided above the PCB near the inside of the radiator
  • a plane is provided on the surface of the radiator
  • a horizontal part is provided inside the radiator near the top of the RF coupling probe
  • a curved groove is provided inside the plane.
  • Capacitive coupling is used to transform the radiator into a radiating part of the antenna, and realize dual-passage through the coupling gap.
  • Frequency band resonance combines radiation and heat dissipation into one, which not only meets the performance requirements of the antenna, but also solves the problem of heat dissipation of electronic equipment.
  • the antenna performance is greatly affected by the PCB board below, causing the antenna to be too directional and the radiation performance in all directions to be uneven.
  • Embodiments of the present application provide an electronic device that can avoid or reduce the impact of the circuit board on the antenna performance of the antenna, thereby avoiding the problem of excessive directivity of the antenna and uneven radiation performance in various directions.
  • Embodiments of the present application provide an electronic device, which at least includes: a circuit board, electronic components, and metal structural parts; the metal structural parts are stacked and spaced apart from the circuit board, and the electronic components are located on the between the circuit board and the metal structural member; further comprising: a first conductive member; the first conductive member is located between the circuit board and the metal structural member, and one end of the first conductive member is connected to the The circuit board is electrically connected, and the other end of the first conductive member is electrically connected to the metal structural member; the metal structural member at least includes: a main body part and a first side connected to the main body part.
  • the first radiating part, the first radiating part, the area on the circuit board corresponding to the first radiating part, and the first conductive member form a first radiation cavity; the circuit board A first feed point is provided on the top, and the first feed point is electrically connected to the first radiation part.
  • a first conductive member is disposed between the circuit board and the metal structural member. One end of the first conductive member is electrically connected to the circuit board, and the other end of the first conductive member is electrically connected to the circuit board.
  • the metal structural parts are electrically connected, and the first radiating part of the metal structural part, the area on the circuit board corresponding to the first radiating part, and the first conductive part can be surrounded to form a first radiation cavity, and the first radiation cavity is formed by A first feeding point is provided.
  • the first feeding point is electrically connected to the first radiating part.
  • the first feeding point can feed the first radiating part to form a cavity antenna in the first radiating cavity. In this way, It can avoid or reduce the impact of the circuit board on the antenna performance of the cavity antenna, thereby avoiding the problem of excessive directivity of the antenna and uneven radiation performance in various directions.
  • the main body part has a first fixed end corresponding to the first radiating part, and there is a third fixed end between part of the outer edge of the first radiating part and the first fixed end.
  • the first fixed end corresponding to the first radiating part By designing the first fixed end corresponding to the first radiating part, the first fixed end is used to achieve mutual fixation between the metal structural component and the circuit board.
  • the outer edge of the first radiation part located at the first gap is electrically connected to the corresponding first feed point. In this way, the first feed point The electric point can feed the first radiation part through the first gap.
  • a first conductive part is provided on a side of the first radiation part facing the circuit board; the first conductive part The projection area of the electrical part on the circuit board is located within the projection area of the first radiation part on the circuit board.
  • the first conductive part By disposing the first conductive part on the side of the first radiating part facing the circuit board, the first conductive part can locally thicken the first radiating part to perform distributed matching loading.
  • one end of the first conductive part in the first direction faces the main body part, and the other end of the first conductive part in the first direction extends along the first direction. to an end of the first radiation part away from the main body part; wherein the first direction is the extension direction of the first gap.
  • One end of the antenna can adjust the impedance of the antenna in the first frequency band (such as the 2.4G frequency band).
  • one end of the first conductive part in the second direction is located at an intermediate position of the first radiation part in the second direction; the first conductive part is in the second direction.
  • the other end of the first conductive portion extends along the second direction toward the first slit, or the other end of the first conductive portion in the second direction extends away from the first slit along the second direction; Wherein, the second direction and the first direction are perpendicular to each other.
  • the first conductive part By arranging one end of the first conductive part in a direction perpendicular to the extending direction of the first slit at an intermediate position of the first radiating part in a direction perpendicular to the extending direction of the first slit, the first conductive part is The other end in a direction perpendicular to the extension direction of the first slit extends towards the first slit in a direction perpendicular to the extension direction of the first slit, or the first conductive part is arranged in a direction opposite to the extension direction of the first slit.
  • the other end in the vertical direction extends away from the first slit in a direction perpendicular to the extension direction of the first slit, and can adjust the impedance of the antenna in the second frequency band (such as the 5G frequency band).
  • the first conductive member extends along the second direction, or the first conductive member extends along the first direction, and the first conductive member is located at the The side of the first radiation part away from the first gap; the circuit board, the first radiation part and the first conductive member are collectively surrounded to form the first radiation cavity.
  • the extending direction of the first conductive member may be along a direction perpendicular to the extending direction of the first slit, or the extending direction of the first conductive member may also be along the first slit.
  • the circuit board, the first radiating part and the first conductive member can collectively surround and form a first radiation cavity to form a cavity antenna.
  • the first conductive member includes two or more spaced apart conductive members, one of the two or more spaced apart conductive members extends along the second direction. , the other of the two or more spaced conductive members extends along the first direction and is located on a side of the first radiation part away from the first gap; the circuit board, the The first radiation part and the two or more spaced apart conductive members together form the first radiation cavity.
  • the extension direction of one of the conductive members may be along a direction perpendicular to the extension direction of the first slit, and the extension direction of the other conductive member may also be along In this way, the circuit board, the first radiating part and two or more conductive members can collectively surround the first slit to form a first radiating cavity to form a cavity antenna.
  • the metal structural member further includes: a second radiating part connected to the main body part and located on the second side of the main body part; the main body part There is also a second fixed end corresponding to the second radiating part; there is a second gap between part of the outer edge of the second radiating part and the second fixed end; and a second fixed end is provided on the circuit board. Feeding point, the outer edge of the second radiating part located at the second gap is electrically connected to the corresponding second feeding point; the second radiating part, the circuit board and the second The corresponding area of the radiation part and the second conductive member together form a second radiation cavity.
  • the first radiating part corresponds to the first conductive member
  • the circuit board, the first radiating part and the first conductive member are collectively surrounded to form a first radiation cavity
  • the first feeding point feeds the first radiating part to
  • a cavity antenna is formed in the first radiating cavity.
  • the circuit board, the second radiating part and the second conductive member are collectively surrounded to form a second radiating cavity.
  • the second feeding point feeds the second radiating part so as to generate electricity in the first radiation cavity.
  • Another cavity antenna is formed within the second radiation cavity.
  • the first radiating part and the second radiating part are respectively located on both sides of the main body part, and the extending directions of the first conductive member and the second conductive member intersect. .
  • the circuit board, the first radiating part and the first conductive part are jointly surrounded to form a first radiation cavity
  • the circuit board, the second radiating part and the second conductive part are jointly surrounded to form a second radiation cavity.
  • the first radiation cavity The body and the second radiation cavity are arranged relatively orthogonally, which can increase the isolation between the cavity antenna in the first radiation cavity and the cavity antenna in the second radiation cavity, thereby reducing the cavity size in the first radiation cavity. body The degree of mutual interference between the antenna and the cavity antenna in the second radiation cavity.
  • the first radiating part and the second radiating part are respectively located on opposite sides of the main body part, and the extension direction of the first conductive member and the second conductive member parallel.
  • the circuit board, the first radiating part and the first conductive part are jointly surrounded to form a first radiation cavity
  • the circuit board, the second radiating part and the second conductive part are jointly surrounded to form a second radiation cavity.
  • the first radiation cavity The body and the second radiation cavity are arranged relatively parallel, and the first radiation cavity and the second radiation cavity are respectively located on opposite sides of the main body.
  • the first radiation cavity and the second radiation cavity are separated by the main body. , can increase the isolation between the cavity antenna in the first radiation cavity and the cavity antenna in the second radiation cavity, thereby reducing the isolation between the cavity antenna in the first radiation cavity and the cavity in the second radiation cavity The degree of mutual interference between antennas.
  • the metal structural member further includes: a third radiating part connected to the main body part and located on the third side of the main body part; the first The radiating part, the second radiating part and the third radiating part are respectively located on three sides of the main body part; the main body part also has a third fixed end corresponding to the third radiating part; the third radiating part There is a third gap between part of the outer edge of the three radiating parts and the third fixed end; a third feed point is provided on the circuit board, and the third radiating part is located outside the second gap. The edge is electrically connected to the corresponding third feed point; the third radiating part, the area on the circuit board corresponding to the third radiating part, and the third conductive member are collectively surrounded to form a third Three radiating cavities.
  • the circuit board, the first radiating part and the first conductive member are collectively surrounded to form a first radiation cavity, and the first feeding point feeds the first radiating part to form a cavity antenna in the first radiation cavity.
  • the circuit board, the second radiating part and the second conductive member are collectively surrounded to form a second radiation cavity, and the second feeding point feeds the second radiating part to form another cavity antenna in the second radiation cavity.
  • the circuit board, the third radiating part and the third conductive member are collectively surrounded to form a third radiating cavity, and the third feeding point feeds the third radiating part to form another cavity antenna in the third radiating cavity.
  • the length of the first radiation cavity in the first direction is 1/4 ⁇ 1 ⁇ 1/8 ⁇ 1 ; the length of the first radiation cavity in the second direction The length is 1/2 ⁇ 2 ⁇ 1/8 ⁇ 2 ; the ⁇ 1 is the wavelength of the electromagnetic wave in the free space in the first frequency band, and the ⁇ 2 is the wavelength of the electromagnetic wave in the free space in the second frequency band.
  • the length of the first radiation cavity in the extension direction of the first slot By designing the length of the first radiation cavity in the extension direction of the first slot to 1/4 ⁇ 1 ⁇ 1/8 ⁇ 1 , it can help the first radiation cavity to excite the first wave in the extension direction of the first slot.
  • TM 1/2,0 mode of the radiation cavity to cover the application of the antenna in the first frequency band.
  • the length of the first radiation cavity in the direction perpendicular to the extension direction of the first slit to 1/4 ⁇ 1 ⁇ 1/8 ⁇ 1 , the extension of the first radiation cavity to the first slit can be facilitated.
  • the TM 0,1 mode of the first radiation cavity is excited in a direction perpendicular to the direction to cover the application of the antenna in the second frequency band.
  • the length of the second radiation cavity in the first direction is 1/4 ⁇ 1 ⁇ 1/8 ⁇ 1 ; the length of the second radiation cavity in the second direction The length is 1/2 ⁇ 2 ⁇ 1/8 ⁇ 2 ; the ⁇ 1 is the wavelength of the electromagnetic wave in the free space in the first frequency band, and the ⁇ 2 is the wavelength of the electromagnetic wave in the free space in the second frequency band.
  • the length of the second radiation cavity in the extension direction of the second slit By designing the length of the second radiation cavity in the extension direction of the second slit to 1/4 ⁇ 1 ⁇ 1/8 ⁇ 1 , it can help the second radiation cavity to excite the second radiation in the extension direction of the second slit.
  • the length of the second radiation cavity in the direction perpendicular to the extension direction of the second slit to 1/4 ⁇ 1 ⁇ 1/8 ⁇ 1 , the extension of the second radiation cavity to the second slit can be facilitated.
  • the TM 0,1 mode of the second radiation cavity is excited in a direction perpendicular to the direction to cover the application of the antenna in the second frequency band.
  • the length of the third radiation cavity in the first direction is 1/4 ⁇ 1 ⁇ 1/8 ⁇ 1 ; the length of the third radiation cavity in the second direction The length is 1/2 ⁇ 2 ⁇ 1/8 ⁇ 2 ; the ⁇ 1 is the wavelength of the electromagnetic wave in the free space in the first frequency band, and the ⁇ 2 is the wavelength of the electromagnetic wave in the free space in the second frequency band.
  • the length of the third radiation cavity in the extension direction of the third slit By designing the length of the third radiation cavity in the extension direction of the third slit to 1/4 ⁇ 1 ⁇ 1/8 ⁇ 1 , it can help the third radiation cavity to excite the third radiation in the extension direction of the third slit.
  • the length of the third radiation cavity in the direction perpendicular to the extension direction of the third slit to 1/4 ⁇ 1 ⁇ 1/8 ⁇ 1 , the extension of the third radiation cavity to the third slit can be facilitated.
  • the TM 0,1 mode of the third radiation cavity is excited in the direction perpendicular to the direction to cover the application of the antenna in the second frequency band.
  • the second radiation cavity and the first radiation cavity are used to operate in the same operating frequency band.
  • the cavity antenna formed by the second radiation cavity and the cavity antenna formed by the first radiation cavity operate in the same operating frequency band, and can form a MIMO antenna pair.
  • the third radiation cavity, the second radiation cavity and the first radiation cavity are used to work in the same operating frequency band.
  • the cavity antenna formed by the first radiating cavity, the cavity antenna formed by the second radiating cavity and the cavity antenna formed by the third radiating cavity work in the same operating frequency band and can form a MIMO antenna.
  • the height of the first radiation cavity is 2mm-5mm.
  • the electric field coupling in the first radiation cavity can achieve a better coupling effect, thereby avoiding excessive electric field coupling or excessive electric field coupling caused by too small a height of the first radiation cavity.
  • the height of the first radiation cavity is too large, it may lead to undesirable problems such as failure of electric field coupling.
  • the height of the second radiation cavity is 2mm-5mm.
  • the electric field coupling in the second radiation cavity can achieve a better coupling effect, thereby avoiding excessive electric field coupling or excessive electric field coupling caused by too small a height of the second radiation cavity.
  • the height of the second radiation cavity is too large, it may lead to undesirable problems such as failure of electric field coupling.
  • the height of the third radiation cavity is 2mm-5mm.
  • the electric field coupling in the third radiation cavity can achieve a better coupling effect, thereby avoiding excessive electric field coupling or excessive electric field coupling caused by too small a height of the third radiation cavity.
  • the height of the third radiation cavity is too large, it may lead to undesirable problems such as failure of electric field coupling.
  • the first conductive member is conductive foam; or the first conductive member is conductive glue; or the first conductive member is a metal elastic piece.
  • Conductive bubbles, conductive glue and metal shrapnel can all play the role of electrically connecting circuit boards and metal structural parts.
  • the second conductive member is conductive foam; or the second conductive member is conductive glue; or the second conductive member is a metal elastic piece.
  • Conductive bubbles, conductive glue and metal shrapnel can all play the role of electrically connecting circuit boards and metal structural parts.
  • the third conductive member is conductive foam; or the third conductive member is conductive glue; or the third conductive member is a metal elastic piece. Conductive bubbles, conductive glue and metal shrapnel can all play the role of electrically connecting circuit boards and metal structural parts.
  • the metal structural component is a heat sink; and the electronic components are heating components.
  • the radiator as a metal structural member, the structure of the radiator can be used to form an antenna, and the radiator can be transformed into a radiating part of the antenna, so that radiation and heat dissipation are integrated into one. Not only does it meet the performance requirements of the antenna, the radiator can also provide The heating components dissipate heat and also solve the heat dissipation problem of electronic equipment, which can save the cost of the antenna to a certain extent.
  • the embodiments of the present application do not need to destroy the structure of the radiator itself when forming the antenna, thereby not affecting the heat dissipation performance of the radiator.
  • the electronic device is a speaker.
  • the internal space of the speaker to form a cavity antenna, the space for designing the antenna in the speaker can be saved to a large extent, and it can also save the cost of making the antenna to a certain extent.
  • Figure 1 is a schematic diagram of the overall structure of an electronic device provided by an embodiment of the present application.
  • Figure 2 is a side view of an electronic device provided by an embodiment of the present application.
  • Figure 3 is an exploded view of Figure 1;
  • Figure 4 is a partial structural schematic diagram of an electronic device provided by an embodiment of the present application.
  • Figure 5 is a current and electric field distribution diagram of a cavity antenna in an electronic device provided by an embodiment of the present application at 2.4G;
  • Figure 6 is a current and electric field distribution diagram of a cavity antenna in an electronic device provided by an embodiment of the present application under 5G;
  • Figure 7 is an antenna scattering parameter diagram corresponding to the cavity antenna in the electronic device provided by an embodiment of the present application.
  • Figure 8 is an antenna pattern of a cavity antenna in an electronic device provided by an embodiment of the present application under 2.4G;
  • Figure 9 is an antenna pattern under 5G of a cavity antenna in an electronic device provided by an embodiment of the present application.
  • Figure 10 is a comparison diagram of the loading effect of the conductive part on the cavity antenna in the electronic device provided by an embodiment of the present application.
  • Figure 11 is a comparison diagram of the loading effect of the conductive part on the cavity antenna in the electronic device provided by an embodiment of the present application.
  • Figure 12 is a schematic diagram of the resonance of the cavity antenna at 2.4G when the conductive parts in the electronic device provided by an embodiment of the present application are of different sizes;
  • Figure 13 is a schematic diagram of the resonance of the cavity antenna under 5G when the conductive parts in the electronic device provided by an embodiment of the present application are of different sizes;
  • Figure 14 is a schematic diagram of the overall structure of an electronic device provided by an embodiment of the present application.
  • Figure 15 is an exploded view of Figure 14;
  • Figure 16 is a partial structural schematic diagram of an electronic device provided by an embodiment of the present application.
  • Figure 17 is an antenna scattering parameter diagram corresponding to the cavity antenna in the electronic device provided by an embodiment of the present application.
  • Figure 18 is the antenna pattern of the cavity antenna in the electronic device provided by an embodiment of the present application under 2.4G;
  • Figure 19 is an antenna pattern under 5G of a cavity antenna in an electronic device provided by an embodiment of the present application.
  • Figure 20 is a schematic diagram of the overall structure of an electronic device provided by an embodiment of the present application.
  • Figure 21 is an exploded view of Figure 20;
  • Figure 22 is a partial structural schematic diagram of an electronic device provided by an embodiment of the present application.
  • Figure 23 is an antenna scattering parameter diagram corresponding to the cavity antenna in the electronic device provided by an embodiment of the present application.
  • Figure 24 is an antenna pattern of a cavity antenna in an electronic device provided by an embodiment of the present application under 2.4G;
  • Figure 25 is an antenna pattern under 5G of a cavity antenna in an electronic device provided by an embodiment of the present application.
  • Figure 26 is a schematic diagram of the antenna efficiency of the cavity antenna in the electronic device provided by an embodiment of the present application.
  • Figure 27 is a schematic diagram of the overall structure of an electronic device provided by an embodiment of the present application.
  • Figure 28 is an exploded view of Figure 27;
  • Figure 29 is a partial structural schematic diagram of an electronic device provided by an embodiment of the present application.
  • Figure 30 is an antenna scattering parameter diagram corresponding to the cavity antenna in the electronic device provided by an embodiment of the present application.
  • Figure 31 is the antenna pattern of the cavity antenna in the electronic device provided by an embodiment of the present application under 2.4G;
  • Figure 32 is an antenna pattern under 5G of a cavity antenna in an electronic device provided by an embodiment of the present application.
  • FIG. 33 is a schematic diagram of the overall structure of an electronic device according to an embodiment of the present application.
  • Embodiments of the present application provide an electronic device, which may include but is not limited to smart speakers, smart door locks, mobile phones, tablet computers, notebook computers, ultra-mobile personal computers (UMPC), handheld computers, walkie-talkies, Netbooks, point of sales (POS) machines, personal digital assistants (PDA), wearable devices, virtual reality devices, wireless USB flash drives, Bluetooth speakers/headphones, or car front-mounted equipment, driving recorders, Mobile or fixed terminals with antennas such as security equipment.
  • UMPC ultra-mobile personal computers
  • POS point of sales
  • PDA personal digital assistants
  • wearable devices virtual reality devices
  • wireless USB flash drives wireless USB flash drives
  • Bluetooth speakers/headphones or car front-mounted equipment
  • driving recorders Mobile or fixed terminals with antennas such as security equipment.
  • the speaker is the above-mentioned electronic device as an example for description.
  • the speaker may be a barrel-type speaker, for example.
  • different antenna structures can be designed at different spatial locations on the speaker.
  • different resonant antennas can be arranged at different positions in the speaker space to meet the antenna requirements of the speaker in different scenarios.
  • a cavity antenna can be formed inside the speaker.
  • the metal cavity itself is a closed structure, and energy oscillates inside. By opening slits on the surface of the cavity, the energy is radiated out, forming a cavity antenna.
  • the resonant frequency of a cavity antenna is not only determined by its geometric size, but also affected by the size of the gap and the filling medium. Opening a slit is equivalent to increasing the volume of the cavity. The larger the gap, the wider the resonant bandwidth and the lower the resonant frequency point.
  • the cavity antenna relies on the internal oscillation of the cavity to generate resonance, the energy is mainly concentrated inside the cavity, and its radiation characteristics are less affected by the external environment.
  • a radiator is provided above the Printed Circuit Board (PCB)
  • a radio frequency coupling probe is provided above the PCB near the radiator
  • a plane is provided on the surface of the radiator, and, There is a horizontal part inside the radiator close to the top of the RF coupling probe, and a curved groove inside the plane.
  • Capacitive coupling is used to convert the radiator into a radiating part of the antenna, and dual frequency bands are realized through the coupling gap. resonance.
  • the antenna performance is greatly affected by the PCB board below, which results in the antenna being too directional and the radiation performance in all directions uneven.
  • the electronic device may be a speaker, for example.
  • at least one conductive member is disposed between the circuit board and the metal structural member. One end of the conductive member is connected to the circuit board. Electrically connected, the other end of the conductive member is electrically connected to the metal structural member.
  • Each radiating part of the metal structural member, the area corresponding to each radiating part on the circuit board, and at least one conductive member can be surrounded to form a radiation cavity, Moreover, by providing a feed point between the circuit board and each radiating part, the feeding point is electrically connected to the corresponding radiating part, and the feeding point can feed each radiating part, so that in each radiation cavity Forming a cavity antenna can avoid or reduce the impact of the circuit board on the antenna performance of the cavity antenna, thereby avoiding the problem of excessive directivity of the antenna and uneven radiation performance in various directions.
  • the antenna provided in this application is suitable for electronic equipment using one or more of the following MIMO (Multi-in Multi-out, multiple-in, multiple-out) communication technologies: for example, long term evolution (LTE) Communication technology, Wi-Fi communication technology, 5G communication technology, SUB-6G communication technology and other MIMO communication technologies in the future.
  • MIMO communication technology refers to the use of multiple antennas at both the transmitter and receiver to form an antenna system with multiple channels between transmitter and receiver, which has extremely high spectrum utilization efficiency.
  • the structure illustrated in the embodiment of the present application does not constitute a specific limitation on the speaker.
  • the sound box may include more or less components, or combine some components, or split some components, or arrange different components.
  • an embodiment of the present application provides an electronic device 100 .
  • the electronic device 100 may be, for example, a speaker, a mobile phone, or a computer.
  • the electronic device 100 It may include at least: a circuit board 110, electronic components 170 and metal structural members 120, wherein the metal structural members 120 and the circuit board 110 are stacked and spaced apart, and the electronic components 170 may be located between the circuit board 110 and the metal structural member 120.
  • the metal structural member 120 may be a heat sink, and the electronic component 170 may be a heating component.
  • the electronic component 170 and the metal structural member 120 are in contact with each other on a side facing the circuit board 110. Specifically, as shown in FIG.
  • the surface of the platform 1211 , the electronic component 170 and the sinking platform 1211 facing the circuit board 110 are in contact with each other.
  • the metal structural member 120 can provide a good heat dissipation effect for the electronic component 170 .
  • the metal structural member 120 when the metal structural member 120 is a radiator, the metal structural member 120 may be a flat radiator, and the material of the flat radiator may be aluminum.
  • the radiator By using the radiator as the metal structural member 120, the structure of the radiator can be used to form a cavity antenna, and the radiator is transformed into a radiating part of the cavity antenna, so that radiation and heat dissipation are integrated into one, which not only meets the performance requirements of the antenna, but also It also solves the problem of heat dissipation of the electronic device 100, thereby saving antenna costs to a certain extent.
  • the cavity antenna can be implemented within a limited design space, effectively saving the antenna design space inside the electronic device 100 .
  • the cavity antenna provided by the embodiments of the present application does not require additional slotting on the radiator, so there is no need to destroy it when forming the cavity antenna.
  • the structure of the radiator itself will not affect the heat dissipation performance of the radiator.
  • eliminating the groove also has the advantage of not affecting the industrial design appearance of the electronic device.
  • the electronic device 100 may further include: a first conductive member 131 , wherein the first conductive member 131 is located between the circuit board 110 and the metal structural member 120 , and one end of the first conductive member 131 is connected to The circuit board 110 is electrically connected, and the other end of the first conductive member 131 is electrically connected to the metal structural member 120 .
  • the metal structural member 120 may also include: a first radiating part 1221, where the first radiating part 1221 is connected to the main body part 121, and, The first radiating part 1221 is located on the first side 1216 of the main body part 121, so that the first radiating part 1221, the area on the circuit board 110 corresponding to the first radiating part 1221, and the first conductive member 131 can be collectively surrounded to form a third A radiation cavity 151.
  • a first feed point 141 may be provided on the circuit board 110, and the first feed point 141 is electrically connected to the corresponding first radiating part 1221. In this way, the first feed point 141 The first radiating part 1221 can be fed, so that a cavity antenna is formed in the first radiating cavity 151 where the first radiating part 1221 is located.
  • the first feeding point 141 may be a metal dome, a probe, a conductive cable, etc., so that the first radiating part 1221 can be fed through a metal dome, a probe, or a conductive cable. It should be noted that the embodiment of the present application does not limit the specific formation method of the first feed point 141, nor is it limited to the above examples, as long as it can function as a feed connection.
  • the number of first feed points 141 corresponding to the first radiating part 1221 may be one, two, three or more. That is to say, the first radiating part 1221 may be connected through a The first feeding point 141 feeds power, or the first radiating part 1221 may feed through two first feeding points 141 at the same time, or the first radiating part 1221 may feed through three first feeding points at the same time. Point 141 feeds power, or the first radiating part 1221 may feed power through more first feeding points 141 at the same time, which is not limited in the embodiment of the present application.
  • the main body part 121 may have a first fixed end 1213 , and the first fixed end 1213 corresponds to the first radiating part 1221 .
  • the first fixed end 1213 is used to achieve mutual fixation between the metal structural member 120 and the circuit board 110.
  • the circuit board 110 may also be fixed to other structural components to achieve relative fixed positions between other structural components and the circuit board 110 .
  • a first through hole 1212 may be provided on the first fixed end 1213, and a second through hole 111 may be provided on the circuit board 110 in an area corresponding to the first fixed end 1213.
  • the first through hole 1212 is connected to
  • the second through holes 111 are arranged oppositely, and the first through hole 1212 and the second through hole 111 can be fixedly connected through a fixing member (not shown in the figure).
  • the fixing member may be a screw, a screw, a bolt, etc., which is not limited in the embodiments of the present application.
  • first gap 1231 between part of the outer edge of the first radiating part 1221 and the corresponding first fixed end 1213, and the outer edge of the first radiating part 1221 located at the first gap 1231 may It is electrically connected to the corresponding first feed point 141 .
  • the outer edge of the first radiating part 1221 located at the first gap 1231 is electrically connected to the corresponding first feeding point 141 In this way, the first feeding point 141 can feed the first radiating part 1221 through the first gap 1231 .
  • the length of the first radiation cavity 151 in the first direction L1 may be 1/4 ⁇ 1 ⁇ 1/8 ⁇ 1
  • the length of the first radiation cavity 151 in the second direction may be 1 /2 ⁇ 2 ⁇ 1/8 ⁇ 2 .
  • the first direction L1 may be the extending direction of the first slit 1231, and the second direction L2 and the first direction L1 are perpendicular to each other.
  • ⁇ 1 is the wavelength of the electromagnetic wave in the free space under the first frequency band (for example, the 2.4G frequency band), and ⁇ 2 is the wavelength of the electromagnetic wave in the free space under the second frequency band (for example, the 5G frequency band).
  • the length of the first radiation cavity 151 in the extension direction of the first slot 1231 By designing the length of the first radiation cavity 151 in the extension direction of the first slot 1231 to 1/4 ⁇ 1 ⁇ 1/8 ⁇ 1 , it can help the first radiation cavity 151 to extend in the extension direction of the first slot 1231
  • the TM 1/2,0 mode of the first radiation cavity 151 is excited to cover the application of the cavity antenna in the first frequency band (for example, the 2.4G frequency band).
  • the length of the first radiation cavity 151 in the direction perpendicular to the extension direction of the first gap 1231 By designing the length of the first radiation cavity 151 in the direction perpendicular to the extension direction of the first gap 1231 to 1/4 ⁇ 1 ⁇ 1/8 ⁇ 1 , it can be helpful for the first radiation cavity 151 to be connected to the first slit 1231 .
  • the TM 0,1 mode of the first radiation cavity 151 is excited in a direction perpendicular to the extending direction of the slot 1231 to cover the application of the cavity antenna in the second frequency
  • the embodiment of the present application uses the space between the metal structural member 120 and the circuit board 110 to form a cavity antenna by adding the first conductive member 131 to feed the first radiating part 1221 to excite the TM of the first radiating cavity 151
  • the 1/2,0 mode and the orthogonal TM 0,1 mode realize WiFi's 2.4G and 5G dual-band coverage.
  • the cavity antenna has a low directivity coefficient and can achieve horizontal omnidirectional coverage.
  • the directivity coefficient of the cavity antenna may be less than 4dBi.
  • the directivity coefficient of the cavity antenna may be 3.5dBi, 3dBi, 2.5dBi, 2dBi, 1.5dBi, 1dBi or 0.5 dBi etc.
  • the height of the first radiation cavity 151 may be 2mm-5mm.
  • the height of the first radiation cavity 151 may be 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm or 5 mm, etc., which is not limited in the embodiments of the present application.
  • the electric field coupling in the first radiation cavity 151 can reach Better coupling effect can avoid undesirable problems such as too strong electric field coupling when the height of the first radiation cavity 151 is too small, or failure of electric field coupling when the height of the first radiation cavity 151 is too large.
  • a first conductive part 161 may be provided on a side of the first radiating part 1221 facing the circuit board 110 , and the first conductive part 161 is disposed on the circuit board 110
  • the projection area may be located within the projection area of the first radiation part 1221 on the circuit board 110 .
  • one end of the first conductive part 161 in the first direction L1 may face the main body part 121 , and the other end of the first conductive part 161 in the first direction L1 may extend along the first direction L1 to One end of the first radiation part 1221 is away from the main body part 121 .
  • the first conductive part 161 With one end of the first conductive part 161 in the extension direction of the first slit 1231 facing the main body part 121 , the other end of the first conductive part 161 in the extension direction of the first slit 1231 extends along the extension direction of the first slit 1231 To the end of the first radiating part 1221 away from the main body part 121, the first conductive part 161 corresponds to the current small point in the first frequency band (for example, the 2.4G frequency band), and can adjust the performance of the cavity antenna in the first frequency band (for example, the 2.4G frequency band). impedance.
  • the first frequency band for example, the 2.4G frequency band
  • One end of the first conductive part 161 in the second direction L2 may be located at the middle position of the first radiation part 1221 in the second direction L2, and the other end of the first conductive part 161 in the second direction L2 may be along the second direction L2.
  • the direction L2 extends toward the first slit 1231 , or the other end of the first conductive part 161 in the second direction L2 may extend away from the first slit 1231 along the second direction L2 , wherein the second direction L2 is consistent with the first direction.
  • L1 are perpendicular to each other.
  • the impedance of the cavity antenna in the second frequency band can be adjusted.
  • the capacitive loading and inductive deloading effects can be achieved respectively in the 2.4G frequency band and the 5G frequency band. Moreover, by adjusting the size of the first conductive part 161, the cavity can be flexibly adjusted. Antenna impedance frequency deviation.
  • the size of the first conductive part 161 may be, for example, 17mm*18mm*2mm.
  • 5 and 6 are current and electric field distribution diagrams of the cavity antenna in the electronic device 100.
  • the cavity antenna in the electronic device 100 shown in FIGS. 1 to 3 is fed at the feed point 140 , and the 2.4G current flows along the first direction L1 on the circuit board 110 through the first conductive member 131 and flows into the first radiating part 1221 , the electric fields between the first radiation part 1221 and the circuit board 110 are in the same direction, forming the cavity TM1/2,0 mode.
  • the 5G current flows along the second direction L2 on the circuit board 110 and the first radiating part 1221, and the electric field reverses at the middle current point, forming the TM0,1 mode of the cavity.
  • Figure 7 shows the antenna S parameters (scattering parameters) corresponding to the cavity antenna in the electronic device 100 shown in Figures 1 to 3. According to Figure 7, it can be seen that the antenna frequency band of the cavity antenna in the electronic device 100 can cover 2.4 G and 5G dual-band, the in-band efficiency of the cavity antenna in Electronic Equipment 100 is within -1dB.
  • Figures 8 and 9 are antenna patterns corresponding to the cavity antenna in the electronic device 100 shown in Figures 1 to 3. According to Figures 8 and 9, it can be seen that the cavity antenna in the electronic device 100 has a directivity of 2.4G. The coefficient is 2.77dBi, and the 5G directivity coefficient is 3.9dBi. That is to say, the pattern corresponding to the cavity antenna in the electronic device 100 shown in Figures 1 to 3 can ensure good coverage of the horizontal plane.
  • FIGS. 1 to 3 illustrate the loading effect of the first conductive part 161 on the cavity antenna in the electronic device 100 shown in FIGS. 1 to 3 .
  • the two resonance points of the cavity antenna in the electronic device 100 are close to each other, and the Smith chart curves of the antenna are all in the inductive zone.
  • the 2.4G resonance deviates to the low frequency
  • the 5G resonance deviates to the high frequency
  • the corresponding Smith chart curves deviate to the capacitive and inductive areas respectively.
  • the first conductive part 161 plays a role in the 2.4G frequency band.
  • the role of capacitive loading plays a perceptual deloading role in the 5G frequency band.
  • the embodiment of the present application can quickly adjust different resonant frequency deviations by adjusting the size in the corresponding direction.
  • the embodiment of the present application can realize simultaneous debugging of the impedances of the 2.4G frequency band and the 5G frequency band. The same first conductive part 161 debugs different frequency bands. The debugging efficiency is higher and the structural design is simpler.
  • the extension of the first conductive part 161 in the first gap 1231 can also be adjusted.
  • the ratio between the size in the extension direction and the size of the first conductive part 161 in the direction perpendicular to the extension direction of the first gap 1231 achieves optimal matching between the first frequency band and the second frequency band.
  • the first radiating part 1221 may be provided with a first conductive member 131, wherein the specific arrangement of the first conductive member 131 may include but is not limited to the following two possibilities: Method to realize:
  • the first conductive member 131 may extend along the second direction L2, and the circuit board 110, the first radiating part 1221 and the first conductive member 131 are collectively surrounded to form a second conductive member 131.
  • the first conductive member 131 may extend along the first direction L1 , and the first conductive member 131 may be located at the first radiation part 1221 away from the first gap 1231 On one side, the circuit board 110 , the first radiation part 1221 and the first conductive member 131 together form a first radiation cavity 151 .
  • the extension direction of the first conductive member 131 may be along a direction perpendicular to the extension direction of the first gap 1231, or the first conductive member 131 The extension direction may also be along the extension direction of the first gap 1231. In this way, the circuit board 110, the first radiating part 1221 and the first conductive member 131 can collectively surround the first radiation cavity 151 to form a cavity antenna. .
  • extension along the first direction L1 or the extension along the second direction L2 mentioned in the embodiment of the present application is not strictly completely parallel to the first direction L1 or the second direction L2 in the mathematical sense. , but the angle range of 0-10° with this direction can be approximately considered to extend along the first direction L1 or extend along the second direction L2.
  • the first conductive member 131 may be conductive foam, or the first conductive member 131 may be conductive glue, or the first conductive member 131 may be a metal elastic piece.
  • Conductive foam, conductive glue and metal elastic pieces can all play a role in electrically connecting the circuit board 110 and the metal structural member 120 .
  • using conductive foam, conductive glue or metal shrapnel to construct a cavity antenna is simple to implement, can reduce the manufacturing cost of the antenna, and simplify the difficulty of assembling the whole machine.
  • the first conductive member 131 may include: two or more conductive members 1311 arranged at intervals.
  • the metal elastic piece can be designed as a plurality of small elastic pieces arranged at intervals, that is, the first conductive member 131 is arranged as a elastic piece that is grounded at multiple points.
  • the first conductive part 131 By designing the first conductive part 131 as two or more conductive parts 1311 arranged at intervals, at least one of the first radiating part 1221 , the area on the circuit board 110 corresponding to the first radiating part 1221 , and the first conductive part 131 Two or more spaced apart conductive members 1311 can still surround the first radiation cavity 151 , and the first feeding point 141 feeds the first radiation part 1221 to form a cavity in the first radiation cavity 151 body antenna.
  • the first radiation part 1221 may be provided with two corresponding conductive members 1311 .
  • one of the conductive members 1311 may extend along the second direction L2, and the other conductive member 1311 may extend along the first direction L1. Moreover, the other conductive member 1311 is located on the first radiation part 1221 away from the first gap 1231. At this time, the circuit board 110, the first radiation part 1221 and the two conductive members 1311 can be collectively surrounded to form the first radiation cavity 151.
  • the extension direction of one conductive member 1311 may be along the direction perpendicular to the extension direction of the first gap 1231, and the extension direction of the other conductive member 1311 may be It may be along the extending direction of the first gap 1231, so that the circuit board 110, the first radiation part 1221, and the two conductive members 1311 can collectively surround the first radiation cavity 151 to form a cavity antenna.
  • the first gap 1231 may be formed between the first radiation part 1221 and the corresponding first fixed end 1213.
  • the first radiating part 1221 may not have a corresponding first fixed end 1213, that is, the first gap 1231 may be directly formed between the first radiating part 1221 and the adjacent radiating part 122.
  • the first gap 1231 may It is directly formed between the first radiating part 1221 and the second radiating part 1222 (see Figure 33).
  • the body antenna is a body antenna, in which the first radiation cavity 151 is the cavity area of the cavity antenna, and a dual-frequency mode of the 2.4G frequency band and the 5G frequency band is generated in the first radiation cavity 151 .
  • the two conductive members 1311 seal the two sides of the first radiation cavity 151, so that the first radiation cavity 151 becomes a cavity closed on both sides.
  • the first radiation cavity 151 is a cavity with one side closed, and the embodiment of the present application can still achieve the same effect as the above embodiment.
  • Figure 17 shows the antenna S parameters (scattering parameters) corresponding to the cavity antenna in the electronic device 100 shown in Figures 15 and 16. According to Figure 17, it can be seen that the frequency band of the cavity antenna in the electronic device 100 can cover 2.4G and 5G dual-band.
  • Figures 18 and 19 are antenna patterns corresponding to the cavity antenna in the electronic device 100 shown in Figures 15 and 16. According to Figures 18 and 19, it can be seen that the directivity coefficient of the cavity antenna in the 2.4G frequency band is 3dBi , the directivity coefficient in the 5G frequency band is 4.2dBi, and this pattern can ensure good coverage in the horizontal plane.
  • the electronic device 100 may also include: a second conductive member 132, as shown in FIGS. 20 and 21 , and the metal structural member 120 may further include: a second radiating part 1222, wherein the The two radiating parts 1222 are connected to the main body part 121 , and the second radiating part 1222 is located on the second side 1217 of the main body part 121 .
  • a second feed point 142 is provided on the circuit board 110 , and the second feed point 142 can be electrically connected to the second radiation part 1222 .
  • the main body 121 may also have a second fixed end 1214 corresponding to the second radiating part 1222, wherein part of the outer edge of the second radiating part 1222 and the second fixed end 1214 There may be a second gap 1232 between them, and the outer edge of the second radiation part 1222 located at the second gap 1232 may be electrically connected to the corresponding second feed point 142 so that the second feed point 142 can be realized through the second gap 1232 Feeding power to the second radiating part 1222 .
  • the second radiating part 1222 , the area on the circuit board 110 corresponding to the second radiating part 1222 , and the second conductive member 132 together form a second radiation cavity 152 .
  • the circuit board 110, the first radiating part 1221 and the first conductive member 131 together form the first radiation cavity 151, and the first feeding point 141 feeds the first radiating part 1221, so that in the first radiation cavity A cavity antenna is formed in the body 151.
  • the circuit board 110, the second radiating part 1222 and the second conductive member 132 are collectively surrounded to form the second radiating cavity 152.
  • the second feeding point 142 feeds the second radiating part 1222. , to form another cavity antenna in the second radiation cavity 152 .
  • the length of the second radiation cavity 152 in the first direction L1 may be 1/4 ⁇ 1 ⁇ 1/8 ⁇ 1
  • the length of the second radiation cavity 152 in the second direction L2 may be is 1/2 ⁇ 2 ⁇ 1/8 ⁇ 2 , where ⁇ 1 can be the wavelength of the electromagnetic wave in free space in the first frequency band, and ⁇ 2 can be the wavelength of the electromagnetic wave in free space in the second frequency band.
  • the length of the second radiation cavity 152 in the extension direction of the second slot 1232 By designing the length of the second radiation cavity 152 in the extension direction of the second slot 1232 to 1/4 ⁇ 1 ⁇ 1/8 ⁇ 1 , it can help the second radiation cavity 152 to extend in the extension direction of the second slot 1232 .
  • the TM 1/2,0 mode of the second radiation cavity 152 is excited to cover the application of the antenna in the first frequency band.
  • the length of the second radiation cavity 152 in the direction perpendicular to the extension direction of the second gap 1232 By designing the length of the second radiation cavity 152 in the direction perpendicular to the extension direction of the second gap 1232 to 1/4 ⁇ 1 ⁇ 1/8 ⁇ 1 , it can be helpful for the second radiation cavity 152 to connect with the second slit 1232 .
  • the TM 0,1 mode of the second radiation cavity 152 is excited in a direction perpendicular to the extending direction of the slot 1232 to cover the application of the antenna in the second frequency band.
  • the second radiation cavity 152 and the first radiation cavity 151 may operate in the same operating frequency band.
  • the cavity antenna formed by the second radiation cavity 152 and the cavity antenna formed by the first radiation cavity 151 operate in the same operating frequency band, and can form a MIMO antenna pair.
  • the height of the second radiation cavity 152 may be 2 mm-5 mm.
  • the height of the second radiation cavity 152 may be 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm or 5 mm, etc., which is not limited in the embodiments of the present application.
  • the second conductive member 132 may be conductive foam, or the second conductive member 132 may be conductive glue, or the second conductive member 132 may be a metal elastic piece.
  • Conductive foam, conductive glue and metal elastic pieces can all play a role in electrically connecting the circuit board 110 and the metal structural member 120 .
  • using conductive foam, conductive glue or metal shrapnel to construct a cavity antenna is simple to implement, can reduce the manufacturing cost of the antenna, and simplify the difficulty of assembling the whole machine.
  • the second conductive part 162 may be provided on a side of the second radiating part 1222 facing the circuit board 110, and the projection area of the second conductive part 162 on the circuit board 110 may be located at the second The radiation part 1222 is within the projection area on the circuit board 110 .
  • the second conductive part 162 can locally thicken the second radiating part 1222 to perform distributed matching loading.
  • the specific location and size of the second conductive part 162 on the second radiating part 1222 are the same or similar to the specific location and size of the first conductive part 161 on the first radiating part 1221, and will not be discussed here. Repeat.
  • the first radiating part 1221 and the second radiating part 1222 may be located on both sides of the main body part 121 respectively, and the extension direction of the first conductive member 131 and the The extending directions of the two conductive members 132 intersect. In one embodiment, the first radiating part 1221 and the second radiating part 1222 may be respectively located on adjacent two sides of the main body part 121 .
  • the circuit board 110, the first radiating part 1221 and the first conductive member 131 are collectively surrounded to form the first radiation cavity 151
  • the circuit board 110, the second radiating part 1222 and the second conductive member 132 are collectively surrounded to form the second radiation cavity.
  • the cavity 152, the first radiation cavity 151 and the second radiation cavity 152 are arranged relatively orthogonally, which can increase the distance between the cavity antenna in the first radiation cavity 151 and the cavity antenna in the second radiation cavity 152.
  • the degree of isolation can further reduce the degree of mutual interference between the cavity antenna in the first radiation cavity 151 and the cavity antenna in the second radiation cavity 152 .
  • the first feeding point 141 is the feeding point of one of the cavity antennas
  • the second feeding point 142 is the feeding point of the other cavity antenna
  • the One radiation cavity 151 is the cavity area of one of the cavity antennas
  • the second radiation cavity 152 is the cavity area of the other cavity antenna.
  • the two cavity antennas in the electronic device 100 are placed orthogonally.
  • the isolation between the two cavity antennas is high, for example, the isolation can reach 40dB.
  • the horizontal plane patterns of the two cavity antennas are complementary, which helps Achieve 360-degree omnidirectional coverage.
  • Figure 23 shows the antenna S parameters (scattering parameters) corresponding to the cavity antenna in the electronic device 100 shown in Figures 20 and 21. According to Figure 23, it can be seen that the cavity antenna in the electronic device 100 operates in the 2.4G frequency band. The isolation between the two cavity antennas reaches -40dB, and in the 5G frequency band, the isolation between the two cavity antennas reaches -30dB.
  • Figures 24 and 25 are antenna patterns corresponding to the cavity antennas in the electronic device 100 shown in Figures 20 and 21. According to Figures 24 and 25, it can be seen that the patterns of the two cavity antennas basically cover the horizontal plane. , and are very complementary and can achieve 360-degree omnidirectional coverage on the horizontal plane.
  • Figure 26 shows the antenna efficiency of the cavity antenna in the electronic device 100 shown in Figure 20 and Figure 21. According to Figure 26, it can be seen that the antenna efficiency of the two cavity antennas in the electronic device 100 is good, and in the working frequency band Within, the antenna efficiency of both cavity antennas is above -0.5dB.
  • the cavity antenna in the electronic device 100 as a dual-antenna body, and by designing the first radiating part 1221 and the second radiating part 1222 under the same metal structural member 120, the first radiating part 1221 and the second radiating part 1222 are designed.
  • the conductive member 131 and the second conductive member 132 construct a cavity antenna, and at the same time, selecting appropriate positions of the first feed point 141 and the second feed point 142 can realize a dual-antenna integrated design. Due to the isolation of the current path of the cavity antenna, there is a high degree of isolation between the two cavity antennas. Moreover, the two cavity antennas are less affected by the surrounding metal environment and still have good radiation performance in the overall environment. .
  • the first radiating part 1221 and the second radiating part 1222 may be respectively located on opposite sides of the main body part 121 .
  • the extension direction of the first conductive member 131 and the extension direction of the second conductive member 132 may be parallel to each other (see FIG. 28 ). Alternatively, in some other embodiments, the extending direction of the first conductive member 131 and the extending direction of the second conductive member 132 may be perpendicular to each other.
  • the circuit board 110, the first radiating part 1221 and the first conductive member 131 are collectively surrounded to form the first radiation cavity 151
  • the circuit board 110, the second radiating part 1222 and the second conductive member 132 are collectively surrounded to form the second radiation cavity.
  • the cavity 152, the first radiation cavity 151 and the second radiation cavity 152 are arranged relatively parallel, and the first radiation cavity 151 and the second radiation cavity 152 are respectively located on opposite sides of the main body 121.
  • the first radiation cavity 151 and the second radiation cavity 152 are separated by the main body 121, which can increase the isolation between the cavity antenna in the first radiation cavity 151 and the cavity antenna in the second radiation cavity 152, and thus The degree of mutual interference between the cavity antenna in the first radiation cavity 151 and the cavity antenna in the second radiation cavity 152 can be reduced.
  • a first conductive member 131 is added between the first radiating part 1221 and the circuit board 110 , and a first feeding point 141 is designed at an appropriate position for feeding.
  • a second conductive member 132 is added between the second radiating part 1222 and the circuit board 110, and a second feed point 142 is designed at a suitable position for feeding and excitation to form a cavity antenna.
  • the first feeding point 141 is the feeding point of one of the cavity antennas
  • the second feeding point 142 is the feeding point of the other cavity antenna
  • the first radiation cavity 151 is the cavity of one of the cavity antennas.
  • the second radiation cavity 152 is the cavity area of another cavity antenna.
  • Figure 30 shows the antenna S parameters (scattering parameters) corresponding to the cavity antennas in the electronic device 100 shown in Figures 27 and 28 , it can be seen from Figure 30 that the two cavity antennas in the electronic device 100 have the same polarization, but the isolation between the two cavity antennas can still reach more than -20dB, which can meet the index requirements of most products.
  • Figures 31 and 32 are antenna patterns corresponding to the cavity antennas in the electronic device 100 shown in Figures 27 and 28. According to Figures 31 and 32, it can be seen that the two cavity antennas have good horizontal direction patterns. Omnidirectional coverage can meet the coverage needs of end products.
  • the electronic device 100 may further include: a third conductive member 133
  • the metal structural member 120 may further include: a third radiating part 1223 , wherein the third radiating part 1223 is connected to the main body part 121 , and, The three radiating parts 1223 are located on the third side 1218 of the main body part 121.
  • the first radiating part 1221, the second radiating part 1222 and the third radiating part 1223 may be respectively located on three sides of the main body part 121.
  • a third feed point 143 is provided on the circuit board 110 , and the third feed point 143 can be electrically connected to the third radiation part 1223 .
  • the main body 121 may also have a third fixed end 1215 corresponding to the third radiating part 1223, and part of the outer edge of the third radiating part 1223 There is a third gap 1233 between the third fixed end 1215 and the outer edge of the third radiation part 1223 located at the second gap 1232 can be electrically connected to the corresponding third feed point 143 so that the third feed point 143 can
  • the third radiating part 1223 is fed through the third gap 1233 , so that the circuit board 110 , the third radiating part 1223 and the third conductive member 133 can be collectively surrounded to form the third radiation cavity 153 .
  • the circuit board 110, the first radiating part 1221 and the first conductive member 131 together form the first radiation cavity 151, and the first feeding point 141 feeds the first radiating part 1221, so that in the first radiation cavity A cavity antenna is formed in the body 151.
  • the circuit board 110, the second radiating part 1222 and the second conductive member 132 are collectively surrounded to form the second radiating cavity 152.
  • the second feeding point 142 feeds the second radiating part 1222.
  • the circuit board 110, the third radiation part 1223 and the third conductive member 133 are collectively surrounded to form the third radiation cavity 153, and the third feed point 143 pair
  • the third radiating part 1223 performs power feeding to form another cavity antenna in the third radiating cavity 153 .
  • the length of the third radiation cavity 153 in the first direction L1 may be 1/4 ⁇ 1 ⁇ 1/8 ⁇ 1
  • the length of the third radiation cavity 153 in the second direction L2 The length can be 1/2 ⁇ 2 ⁇ 1/8 ⁇ 2 , where ⁇ 1 is the wavelength of electromagnetic waves in free space in the first frequency band, and ⁇ 2 is the wavelength of electromagnetic waves in free space in the second frequency band.
  • the third radiation cavity 153 By designing the length of the third radiation cavity 153 in the extension direction of the third slit 1233 to 1/4 ⁇ 1 ⁇ 1/8 ⁇ 1 , it can help the third radiation cavity 153 to extend in the extension direction of the third slit 1233 .
  • the TM 1/2,0 mode of the third radiation cavity 153 is excited to cover the application of the antenna in the first frequency band.
  • the length of the third radiation cavity 153 in the direction perpendicular to the extension direction of the third gap 1233 By designing the length of the third radiation cavity 153 in the direction perpendicular to the extension direction of the third gap 1233 to 1/4 ⁇ 1 ⁇ 1/8 ⁇ 1 , it can be helpful for the third radiation cavity 153 to be connected to the third slit 1233 .
  • the TM 0,1 mode of the third radiation cavity 153 is excited in a direction perpendicular to the extending direction of the slot 1233 to cover the application of the antenna in the second frequency band.
  • the third radiation cavity 153, the second radiation cavity 152, and the first radiation cavity 151 can operate in the same operating frequency band.
  • the cavity antenna formed by the first radiation cavity 151, the cavity antenna formed by the second radiation cavity 152, and the cavity antenna formed by the third radiation cavity 153 work in the same operating frequency band, and can form a MIMO antenna.
  • the height of the third radiation cavity 153 may be 2mm-5mm.
  • the height of the third radiation cavity 153 may be 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm or 5 mm, etc., which is not limited in the embodiments of the present application.
  • the third conductive member 133 may be conductive foam, or the third conductive member 133 may be conductive glue, or the third conductive member 133 may be a metal elastic piece.
  • Conductive foam, conductive glue and metal elastic pieces can all play a role in electrically connecting the circuit board 110 and the metal structural member 120 .
  • using conductive foam, conductive glue or metal shrapnel to construct a cavity antenna is simple to implement, can reduce the manufacturing cost of the antenna, and simplify the difficulty of assembling the whole machine.
  • the third conductive part 163 may be provided on a side of the third radiating part 1223 facing the circuit board 110, and the projection area of the third conductive part 163 on the circuit board 110 may be located on the third The radiation part 1223 is within the projection area on the circuit board 110 .
  • the third conductive part 163 can locally thicken the third radiating part 1223 to perform distributed matching loading.
  • the specific location and size of the third conductive part 163 on the third radiating part 1223 are the same or similar to the specific location and size of the first conductive part 161 on the first radiating part 1221 and will not be discussed here. Repeat.
  • the cavity antenna in the electronic device 100 by extending the cavity antenna in the electronic device 100 to a three-antenna common design, due to the isolation of the current path of the cavity antenna, there is a high degree of isolation between the three cavity antennas, which can ensure The three-antenna design provides omnidirectional coverage in the horizontal plane and the high isolation design can improve antenna performance in coexistence scenarios. Moreover, the three cavity antennas are less affected by the surrounding metal environment and still have good radiation performance in the overall environment.
  • the number of cavity antennas in the electronic device 100 may also be four.
  • the cavity antenna in the electronic device 100 can achieve coverage of more antenna modes.
  • connection should be understood in a broad sense.
  • it can be a fixed connection or a fixed connection.
  • Indirect connection through an intermediary can be the internal connection between two elements or the interaction between two elements.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Support Of Aerials (AREA)

Abstract

Les modes de réalisation de la présente invention concerne un dispositif électronique. Dans le dispositif électronique, un élément structural métallique et une carte de circuit imprimé sont empilés et espacés, un premier élément conducteur étant situé entre la carte de circuit imprimé et l'élément structural métallique. Une extrémité du premier élément conducteur est électriquement connectée à la carte de circuit imprimé, et l'autre extrémité du premier élément conducteur est électriquement connectée à l'élément structural métallique. L'élément structural métallique comprend au moins : une partie de corps principal, et une première partie de rayonnement reliée à la partie de corps principal et située sur un premier côté de la partie de corps principal, une première cavité de rayonnement étant formée en étant entourée par la première partie de rayonnement, la zone sur la carte de circuit imprimé correspondant à la première partie de rayonnement, et le premier élément conducteur. Un premier point d'alimentation est disposé sur la carte de circuit imprimé, le premier point d'alimentation étant électriquement connecté à la première partie de rayonnement. De cette manière, l'impact de la carte de circuit imprimé sur les performances d'antenne d'une antenne peut être évité ou réduit, ce qui permet d'éviter le problème de performance de rayonnement irrégulière dans toutes les directions provoquée par une directivité excessivement forte de l'antenne.
PCT/CN2023/110869 2022-08-03 2023-08-02 Dispositif électronique WO2024027778A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202210925906.9 2022-08-03
CN202210925906.9A CN117560842A (zh) 2022-08-03 2022-08-03 电子设备

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WO2024027778A1 true WO2024027778A1 (fr) 2024-02-08

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050162321A1 (en) * 2004-01-23 2005-07-28 Colburn Joseph S. Dual band, low profile omnidirectional antenna
CN206461092U (zh) * 2017-02-17 2017-09-01 东莞市新盛电子有限公司 一种散热器天线
CN209766640U (zh) * 2019-06-21 2019-12-10 潍坊歌尔电子有限公司 一种天线结构及无线设备
CN112736431A (zh) * 2020-12-25 2021-04-30 Oppo广东移动通信有限公司 天线装置及电子设备
CN214627565U (zh) * 2020-12-15 2021-11-05 荣耀终端有限公司 一种电子设备

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050162321A1 (en) * 2004-01-23 2005-07-28 Colburn Joseph S. Dual band, low profile omnidirectional antenna
CN206461092U (zh) * 2017-02-17 2017-09-01 东莞市新盛电子有限公司 一种散热器天线
CN209766640U (zh) * 2019-06-21 2019-12-10 潍坊歌尔电子有限公司 一种天线结构及无线设备
CN214627565U (zh) * 2020-12-15 2021-11-05 荣耀终端有限公司 一种电子设备
CN112736431A (zh) * 2020-12-25 2021-04-30 Oppo广东移动通信有限公司 天线装置及电子设备

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