WO2021031944A1 - 一种天线组件和具有卷曲屏的电子设备 - Google Patents

一种天线组件和具有卷曲屏的电子设备 Download PDF

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Publication number
WO2021031944A1
WO2021031944A1 PCT/CN2020/108603 CN2020108603W WO2021031944A1 WO 2021031944 A1 WO2021031944 A1 WO 2021031944A1 CN 2020108603 W CN2020108603 W CN 2020108603W WO 2021031944 A1 WO2021031944 A1 WO 2021031944A1
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WO
WIPO (PCT)
Prior art keywords
antenna
radiator
extension
metal
stub
Prior art date
Application number
PCT/CN2020/108603
Other languages
English (en)
French (fr)
Inventor
马国忠
李金磊
陈浩
钟鼎
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
Priority to EP20854537.6A priority Critical patent/EP4020705A4/en
Priority to CA3155457A priority patent/CA3155457C/en
Publication of WO2021031944A1 publication Critical patent/WO2021031944A1/zh

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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
    • 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
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in 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
    • H01Q1/44—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
    • 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
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
    • 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
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
    • H01Q5/328—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors between a radiating element and ground
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
    • H04M1/0268—Details of the structure or mounting of specific components for a display module assembly including a flexible display panel

Definitions

  • This application relates to the field of terminal technology, and in particular to an antenna assembly and an electronic device with a curled screen.
  • Smart terminals such as mobile phones need to communicate through the mobile communication network provided by the operator. They can also communicate between smart devices through various methods such as Wireless Fidelity (WIFI), Bluetooth, and infrared. For mobile phones , The communication signal is sent and received through the antenna. Because the mobile phone has various communication methods, it is necessary to set more antennas inside the mobile phone.
  • WIFI Wireless Fidelity
  • Bluetooth Bluetooth
  • infrared Infrared
  • the top and bottom of the metal frame 1 of the mobile phone are specifically cut to form a first antenna 1a and a second antenna 1b.
  • the first antenna 1a includes a metal top.
  • the frame and part of the metal side frame, and the second antenna 1b includes a metal bottom frame and part of the metal side frame.
  • the side frame of the mobile phone is a non-metal frame, for example, the side of the mobile phone is a glass frame, so that the total length of the metal frame that can be used as an antenna is reduced, resulting in insufficient length space on the mobile phone to arrange all the antennas.
  • the present application provides an antenna assembly and an electronic device with a crimped screen, which extends the length of the antenna, ensures the radiation efficiency of the antenna, and solves the problem that the metal frame that can be used as an antenna in the existing mobile phone is reduced and the mobile phone can be arranged The problem of insufficient antenna length.
  • a first aspect of the embodiments of the present application provides an antenna assembly applied to an electronic device, wherein the antenna assembly includes: a first antenna, and the first antenna includes: a first radiator, a first extension stub, and The first extension stub is electrically connected to the first feed point and the first ground point; one end of the first extension stub is connected to the first radiator, and the other end of the first extension stub extends to the electronic Inside the device, the first radiator is located on the metal top frame or the metal bottom frame of the electronic device.
  • the first antenna includes a first radiator and a first extension branch connected to the first radiator.
  • the first radiator is located on the metal top frame or the metal bottom frame of the electronic device, so that the first radiator can radiate the induction cooker outwards, ensuring Radiation efficiency of the first antenna.
  • a second antenna which includes at least a second radiator, a second extension stub, and a second feed point electrically connected to the second extension stub, and A second ground point, one end of the second extension branch is connected to the second radiator, and the other end of the second extension branch extends into the inside of the electronic device.
  • the first radiator is located at one end of the metal top frame, and the second radiator is located at the other end of the metal top frame, or,
  • the first radiator is located at one end of the metal bottom frame, and the second radiator is located at the other end of the metal bottom frame.
  • the first radiator is located at one end of the metal top frame and the second radiator is located at one end of the metal bottom frame, or the first radiator is located at one end of the metal bottom frame, and the second radiator is located at one end of the metal top frame.
  • the second extension stub By arranging the second extension stub, the second extension stub extends the length of the second antenna and ensures that the second antenna has a sufficient length.
  • the third antenna at least includes: a third radiator, and a third feed point and a third ground point electrically connected to the third radiator.
  • the third radiator is located between the first radiator and the second radiator, and two ends of the third radiator are located between the first radiator and the second radiator. Broken seam.
  • the third antenna can borrow the radiation stub of the first antenna or the second antenna, and the first antenna and the second antenna can borrow the radiator of the third antenna for radiation, ensuring that the third antenna, the first antenna and the second antenna are relatively long in length.
  • the corresponding resonant frequency is excited for hours.
  • a fourth antenna the fourth antenna at least including: a fourth radiator, a fourth extension stub, and a fourth feed point electrically connected to the fourth extension stub And the fourth ground point.
  • One end of the fourth extension branch is connected to the fourth radiator, the other end of the fourth extension branch extends to the inside of the electronic device, and the fourth radiator and the first radiator One of them is located at the metal top frame, and the other is located at the metal bottom frame.
  • the length of the fourth antenna is extended, ensuring that more antennas can be arranged in the electronic device.
  • a fifth antenna which includes at least a fifth radiator, a fifth extension stub, and a fifth feed point electrically connected to the fifth extension stub, and A fifth ground point, one end of the fifth extension branch is connected to the fifth radiator, and the other end of the fifth extension branch extends to the inside of the electronic device.
  • the fourth radiator is located at one end of the metal top frame, the fifth radiator is located at the other end of the metal top frame, or the fourth radiator is located at one end of the metal bottom frame, The fifth radiator is located at the other end of the metal bottom frame.
  • one of the fourth radiator, the fifth radiator, the first radiator and the second radiator is located at one end of the top frame of the metal cloth, the other end is located at the other end of the top frame of the metal, and the third is located at the bottom of the metal frame
  • the fourth is at the other end of the metal bottom frame.
  • the length of the fifth antenna is extended, ensuring that a sufficiently long antenna can be arranged in the electronic device.
  • it further includes: a sixth antenna, and the sixth antenna at least includes: a sixth radiator, and a sixth feed point and a sixth ground point electrically connected to the sixth radiator.
  • the sixth radiator is located between the fourth radiator and the fifth radiator, and two ends of the sixth radiator are located between the fourth radiator and the fifth radiator. Broken seam.
  • the radiator of the sixth antenna is located at the fifth antenna and the fourth antenna, so that the sixth antenna can borrow the radiation stub of the fourth antenna or the fifth antenna, and the fourth antenna and the fifth antenna can borrow the sixth antenna
  • the radiator radiates to ensure that the sixth antenna, the fifth antenna, and the fourth antenna excite the corresponding resonant frequency when the length is small.
  • the third antenna further includes: a first tuning circuit, one end of the first tuning circuit is electrically connected to the third radiator through a first tuning contact point, and the first The other end of the tuning circuit is grounded.
  • the sixth antenna further includes: a second tuning circuit, one end of the second tuning circuit is electrically connected to the sixth radiator through a second tuning contact point, and the other end of the second tuning circuit is grounded.
  • the first tuning circuit enables the third antenna to cover the entire bandwidth of the low frequency band when used as a low frequency antenna
  • the second tuning circuit enables the sixth antenna to cover the entire bandwidth of the low frequency band when used as a low frequency antenna.
  • both the first tuning circuit and the second tuning circuit board include a tuning switch and at least one matching circuit, one end of the matching circuit is electrically connected to the tuning switch, and the matching The other end of the circuit is grounded.
  • the third antenna and the sixth antenna can be switched to matching paths of different loads through the tuning switch, so that the third antenna and the sixth antenna can cover more bandwidth.
  • the first radiator, the second radiator, and the third radiator are three metal frames formed by the metal top frame by breaking two slits.
  • the fourth radiator, the fifth radiator and the sixth radiator are three metal frames formed by the metal bottom frame by breaking two slits.
  • the metal top frame can act as the first radiator, the second radiator and the third radiator to emit electromagnetic waves
  • the metal bottom frame can act as the fourth radiator, the fifth radiator and the sixth radiator, In this way, an additional antenna radiator is avoided in the electronic device.
  • the metal top frame and the metal bottom frame are used as antenna radiators, since the metal top frame and the metal bottom frame are located at the top and bottom of the electronic device, they have better radiation efficiency.
  • the first extension branch, the second extension branch, the fourth extension branch, and the fifth extension branch are in a suspended bridge structure in the electronic device.
  • the first extension stub, the second extension stub, the fourth extension stub, and the fifth extension stub are the metal midplanes in the electronic device facing the The metal top frame and the metal bottom frame extend to form four metal branches.
  • the metal middle plate is integrally formed with the first extension stub, the second extension stub, the fourth extension stub and the fifth extension stub.
  • One end of the fourth extension branch and the fifth extension branch is grounded through the metal middle plate, so as to avoid grounding between the extension branch and the metal middle plate by providing elastic pieces.
  • the lengths of the first extension node, the second extension node, the fourth extension node, and the fifth extension node are 10-25 mm.
  • the lengths of the first radiator, the second radiator, the fourth radiator, and the fifth radiator are 8-10 mm. This ensures that the first antenna, the second antenna, the fourth antenna, and the fifth antenna can be used as medium and high frequency antennas.
  • the length of the third radiator and the sixth radiator is 50-60 mm. This can ensure that the third radiator and the sixth radiator can be used as low-frequency antennas.
  • the clearances of the first radiator, the second radiator and the third radiator are 1-1.4 mm.
  • the clearance of the fourth radiator, the fifth radiator and the sixth radiator is 1.2-1.4 mm.
  • the clearance of the first extension node, the second extension node, the fourth extension node and the fifth extension node is not less than 0.5 mm. In this way, it is ensured that each radiator and the extension branch have a certain clearance area when working, so that the radiation efficiency of each radiator and the extension branch is higher.
  • the slit width between the two ends of the third radiator and the first radiator and the second radiator is 1-1.5 mm. This ensures that both ends of the third radiator and one end of the first radiator and the second radiator form a capacitive load at the gap, so that the third antenna can borrow the radiation stub of the first antenna or the second antenna.
  • the antenna and the second antenna can borrow the radiation stub of the third antenna.
  • the slit width between the two ends of the sixth radiator and the fourth radiator and the fifth radiator is 1-1.5 mm. This ensures that both ends of the sixth radiator and ends of the fourth radiator and the fifth radiator form a capacitive load at the gap, so that the sixth antenna can borrow the radiation stub of the fourth antenna or the fifth antenna.
  • the antenna and the fifth antenna can borrow the radiation stub of the sixth antenna.
  • each of the high-frequency antennas includes a high-frequency radiator and a feeder electrically connected to the high-frequency radiator Point and ground point.
  • the high-frequency frequency band covered by the antenna is expanded, and the communication demand of the high-frequency band is realized.
  • the high-frequency antenna is located inside the first antenna radiating stub, the second antenna radiating stub, the fourth antenna radiating stub, or the fifth antenna radiating stub.
  • the clearance of the high-frequency antenna is greater than or equal to 0.5 mm. This ensures that the radiation efficiency of the high-frequency antenna is high.
  • the third antenna is a low frequency antenna
  • the first antenna and the second antenna are medium and high frequency antennas
  • the first antenna and the second antenna borrow the third antenna.
  • the radiator of the antenna, the third antenna borrows the radiating stub of the first antenna or the second antenna.
  • one of the first antenna and the second antenna and the third antenna can be used as the main antenna, and the other of the first antenna and the second antenna can be used as a medium and high frequency MIMO antenna or a WIFI antenna.
  • the sixth antenna is a low frequency antenna
  • the fourth antenna and the fifth antenna are medium and high frequency antennas
  • the fifth antenna and the fourth antenna borrow the radiator of the sixth antenna
  • the sixth antenna The antenna borrows the radiation stub of the fourth antenna or the fifth antenna.
  • one of the fourth antenna and the fifth antenna and the sixth antenna can be used as a diversity antenna
  • the other of the fifth antenna and the fourth antenna can be used as a medium and high frequency MIMO antenna, WIFI antenna or GPS antenna.
  • the second aspect of the embodiments of the present application provides an electronic device with a curling screen, which at least includes: a curling screen, a back cover, a middle frame between the curling screen and the back cover, and any of the antennas described above
  • a curling screen which at least includes: a curling screen, a back cover, a middle frame between the curling screen and the back cover, and any of the antennas described above
  • at least one of the top frame and the bottom frame of the middle frame is a metal frame.
  • the metal frame can be used as a radiator of the antenna in the antenna assembly, and the extension branch in the antenna assembly can extend the length of the antenna , So that when the side frame of the electronic device is a non-metal frame, the antenna has sufficient length to avoid the problem of insufficient length of the antenna that can be deployed due to the reduction of the metal frame, and solves the problem of the metal frame that can be used as the antenna in the existing mobile phone The reduction leads to the problem of insufficient antenna length that can be arranged on the mobile phone.
  • the middle frame includes a metal middle plate and a metal top frame and a metal bottom frame located at both ends of the metal middle plate, and the metal middle plate is located in the area enclosed by the curling screen and the back cover. In the space, the metal top frame and the metal bottom frame are respectively located at the top and bottom ends of the curling screen and the back cover.
  • the metal top frame and the metal bottom frame have at least two slits, and the at least two slits separate the metal top frame to form the first part of the antenna assembly.
  • a radiator, a second radiator, and a third radiator located between the first radiator and the second radiator.
  • the at least two slits at least divide the metal bottom frame to form a fourth radiator, a fifth radiator, and a sixth radiator located between the fourth radiator and the fifth radiator of the antenna assembly. Radiator.
  • both sides of the curled screen have curled portions formed by curling toward the back cover, and the first extension branch, the second extension branch, the fourth extension branch and the second extension branch in the antenna assembly
  • the five extension branches extend into the space enclosed by the curling screen and the back cover.
  • the left and right sides of the electronic device are display screens, which achieves a high screen-to-body ratio of the electronic device. It is ensured that a sufficiently long antenna can be arranged when the metal frame in the electronic device is reduced.
  • the two side edges of the metal middle plate respectively extend toward the metal top frame and the metal bottom frame to form the first extension branch, the second extension branch, and the first extension branch.
  • Four extended branches and the fifth extended branch are extended branches and the fifth extended branch.
  • the metal middle plate is integrally formed with the first extension stub, the second extension stub, the fourth extension stub and the fifth extension stub.
  • One end of the fourth extension branch and the fifth extension branch can be grounded through the metal middle plate, so as to avoid grounding between the extension branch and the metal middle plate through the provision of elastic sheets.
  • the curled screen includes a glass layer and a display layer, both sides of the glass layer have first curled portions curled toward the back cover, and both sides of the display layer have The second curling part of the back cover curling.
  • the curling angle of the first curling portion is 90-180°.
  • the curling angle of the second curling part is 90-150°.
  • the left and right sides and part of the back of the electronic device have display areas, which avoids the problem of reducing the screen-to-body ratio due to the existence of the left and right black edges of the electronic device.
  • the embodiment of the present application realizes the high screen-to-body ratio of the electronic device.
  • the back cover is a glass back cover. In this way, the interference of the glass back cover to the antenna provided in the electronic device is reduced, ensuring that the antenna in the electronic device has greater radiation efficiency.
  • FIG. 1 is a schematic diagram of an antenna formed on a metal frame in an existing electronic device
  • FIG. 2 is a schematic diagram of a three-dimensional structure of an electronic device provided by an embodiment of the application.
  • FIG. 3 is a schematic diagram of a split structure of an electronic device provided by an embodiment of the application.
  • FIG. 4 is a schematic diagram of a split structure of a display screen in an electronic device provided by an embodiment of the application;
  • FIG. 5 is a schematic diagram of the back structure of an electronic device provided by an embodiment of the application.
  • FIG. 6 is a schematic diagram of a partial cross-sectional structure of a display screen and a back cover of an electronic device provided by an embodiment of the application;
  • FIG. 7 is a schematic diagram of the internal structure of an electronic device provided by an embodiment of the application.
  • FIG. 8 is a schematic diagram of the structure of the metal middle plate, the top frame and the bottom frame in the electronic device provided by an embodiment of the application;
  • FIG. 9 is a schematic diagram of the electrical principle of the antenna in the electronic device provided by an embodiment of the application.
  • FIG. 10 is a schematic diagram of the structure of the top antenna of the electronic device and the display layer of the display screen according to an embodiment of the application;
  • FIG. 11 is a schematic diagram of the structure of the bottom antenna of the electronic device and the display layer of the display screen provided by an embodiment of the application;
  • FIG. 12 is a schematic diagram of a partial structure of an electronic device provided by an embodiment of the application.
  • FIG. 13 is a schematic diagram of another partial structure of an electronic device provided by an embodiment of the application.
  • FIG. 14 is another schematic diagram of the structure of the top antenna of the electronic device and the display layer of the display screen according to an embodiment of the application;
  • 15 is another schematic diagram of the structure of the bottom antenna of the electronic device and the display layer of the display screen provided by an embodiment of the application;
  • 16 is a schematic diagram of another electrical principle of the antenna in the electronic device provided by an embodiment of the application.
  • FIG. 17 is a schematic diagram of the electrical structure when the third antenna in the electronic device provided by an embodiment of the application is a low-frequency antenna;
  • 18 is a schematic diagram of efficiency in different tuning states when the sixth antenna in the electronic device provided by an embodiment of the application is a low-frequency antenna;
  • 19 is a schematic diagram of the radiation efficiency of the fourth antenna and the fifth antenna under different tunings when the sixth antenna in the electronic device provided by an embodiment of the application is a low-frequency antenna;
  • FIG. 20 is a schematic diagram of radiation efficiency when the fourth antenna in the electronic device provided by an embodiment of the application is a medium and high frequency MIMO antenna;
  • 21 is a schematic diagram of the return loss curves of the fourth antenna, the fifth antenna, and the sixth antenna in the electronic device provided by an embodiment of the application;
  • 22 is a schematic diagram of the current distribution of the sixth antenna during resonance in the electronic device provided by an embodiment of the application.
  • FIG. 23 is a schematic diagram of current distribution on a low-frequency resonance lower frame, a display layer of a display screen, and a metal midplane in an electronic device according to an embodiment of the application;
  • 24 is a schematic diagram of initial radiation efficiency when the fourth antenna and the fourth antenna are matched to GPS and WIFI antennas in the electronic device provided by an embodiment of the application;
  • FIG. 25 is a schematic diagram of current distribution during resonance of a fourth antenna in an electronic device according to an embodiment of the application.
  • FIG. 26 is a schematic diagram of the current distribution of the fifth antenna during resonance in the electronic device according to an embodiment of the application.
  • FIG. 27 is a schematic diagram of the matched radiation efficiency of the fourth antenna, the fifth antenna, and the sixth antenna and the isolation between the fourth antenna and the fifth antenna in the electronic device according to an embodiment of the application;
  • FIG. 28 is still another structural schematic diagram of the top antenna of the electronic device and the display layer of the display screen provided by an embodiment of the application;
  • FIG. 29 is a schematic diagram of another electrical principle of the antenna in the electronic device provided by an embodiment of the application.
  • Fig. 30 is a schematic diagram of the radiation efficiency of the seventh antenna in Fig. 29.
  • 211a-mounting part 211b-feed point structure; 211c-plug-in part; 212-second radiator; 213-third radiator;
  • 2131-first matching circuit 2132-second matching circuit; 2333-third matching circuit; 2134-fourth matching circuit;
  • 2135-first tuning switch 213a-first tuning circuit; 21a-first extension stub; 21b-second extension stub;
  • 23b-fifth extension branch 201-first antenna; 202-second antenna; 203-third antenna; 204-fourth antenna;
  • An electronic device includes, but is not limited to, mobile phones, tablet computers, laptop computers, ultra-mobile personal computers (UMPC), handheld computers, walkie-talkies, netbooks, POS machines, personal digital Mobile or fixed terminals with antennas such as personal digital assistants (PDAs), wearable devices, virtual reality devices, wireless USB flash drives, Bluetooth audio/headsets, or car front-mounted devices.
  • PDAs personal digital assistants
  • wearable devices virtual reality devices
  • wireless USB flash drives wireless USB flash drives
  • Bluetooth audio/headsets or car front-mounted devices.
  • the mobile phone 100 is the above electronic device as an example for description.
  • the mobile phone 100 provided in this embodiment of the application may be a mobile phone with a curled screen.
  • Figures 2 and 3 respectively show the overall structure and Split structure, as shown in FIGS. 2 and 3, the mobile phone 100 may include: a display screen 10, a back cover 40, a middle frame 20, and a circuit board 30.
  • the circuit board 30 may be disposed on the middle frame 20 facing the back cover 40.
  • the display screen 10 and the back cover 40 may be located on both sides of the middle frame 20 respectively.
  • the circuit board 30 may include a first circuit board 31 and a second circuit board 32, and the first circuit board 31 and the second circuit board 32
  • the electrical connection can be made through flexible circuit boards or lead wires.
  • the first circuit board 31 can be located on the upper part of the middle frame 20, and the second circuit board 32 can be located on the lower part of the middle frame 20, so that the top and bottom ends of the mobile phone 100 can be opened.
  • the electrical connection between the interface and the circuit board 30 since components are arranged at the top and bottom of the mobile phone 100, in the embodiment of the present application, the circuit board 30 may include a first circuit board 31 and a second circuit board 32, and the first circuit board 31 and the second circuit board 32
  • the electrical connection can be made through flexible circuit boards or lead wires.
  • the first circuit board 31 can be located on the upper part of the middle frame 20
  • the second circuit board 32 can be located on the lower part of the middle frame 20, so that the top and bottom ends of the mobile phone 100 can be opened.
  • the left and right sides of the display screen 10 are curled toward the back cover 40, so that the left and right sides of the electronic device are the display area of the screen, which eliminates The black borders on the left and right directions of the mobile phone 100 are removed, so that the electronic device has no borders on the left and right sides of the “full screen”.
  • the middle frame 20 includes a metal middle plate 22, a top frame 21 and a bottom frame 23.
  • the top frame 21 and the bottom frame 23 may be located at the top and bottom ends of the metal middle plate 22, respectively.
  • the top frame 21 and the bottom frame 23 are respectively located at the top and bottom ends of the display screen 10 and the back cover 40 (see Figure 2), the top frame 21 and the bottom frame 23 are exposed, and the metal middle plate 22 is located on the display screen. 10.
  • the top frame 21 and the bottom frame 23 are respectively located at the top and bottom ends of the display screen 10 and the back cover 40 (see Figure 2), the top frame 21 and the bottom frame 23 are exposed, and the metal middle plate 22 is located on the display screen. 10. In the space enclosed by the back cover 40, the top frame 21 and the bottom frame 23.
  • the display surface of the mobile phone 100 has two frames, a top frame 21 and a bottom frame 23, and there is no frame on the side of the display surface, and the screen ratio of the mobile phone 100 can reach 95%.
  • the material of the metal middle plate 22 includes but is not limited to aluminum alloy, stainless steel, steel-aluminum composite die-casting plate or titanium alloy.
  • the top frame 21 and the bottom frame 23 may be metal frames, or the top frame 21 and the bottom frame 23 may also be non-metal frames, for example, ceramic frames or glass frames.
  • the material of the metal frame includes but is not limited to aluminum alloy, stainless steel, steel-aluminum composite die-casting plate or titanium alloy.
  • the mobile phone 100 further includes: support frames located on both sides of the metal middle plate 22, for example, the support frame 13a and the support frame 13b, wherein The supporting frame 13a and the supporting frame 13b are located between the top frame 21 and the bottom frame 23.
  • the supporting frame 13a can be connected to one side of the metal middle plate 22, and the supporting frame 13b can be connected to the other side of the metal middle plate 22.
  • the support frame 13a and the support frame 13b provide support for the two curled parts of the display screen 10.
  • the two sides of the display screen 10 can be curled toward the rear cover 40 under the support of the support frame.
  • the support frame 13a and the support frame 13b and the metal middle plate 22 can be connected by clamping, bonding, or fasteners (such as screws).
  • the supporting frame 13a and the supporting frame 13b may be non-metallic supporting frames, for example, plastic supporting frames, so that the weight of the mobile phone 100 can be reduced.
  • the display screen 10 since the display screen 10 needs to be curled, the display screen 10 may be a flexible display screen 10, for example, the flexible display screen 10 may be an organic light-emitting diode (OLED) display screen.
  • OLED organic light-emitting diode
  • the display screen 10 when the display screen 10 is an OLED display screen, the display screen 10 may include a display layer 11 and a glass layer 12.
  • the glass layer 12 covers the display layer 11, and the size of the glass layer 12 can be It is greater than or equal to the size of the display layer 11. Since curling is required, the glass layer 12 may be a bendable glass layer.
  • the display layer 11 may include multiple functional layers.
  • the multiple functional layers may be organic light-emitting layers, anode layers, cathode layers, thin film transistor layers (Thin Film Transistor, TFT) and other film layers, so the display layer 11 has multiple layers of metal Floor.
  • the display screen 10 may further include: a touch layer (not shown), wherein the touch layer may be disposed between the display layer 11 and the glass layer 12.
  • the touch layer may be integrated in the display layer 11 to form a touch display panel integrating touch and display functions, and the glass layer 12 is provided on the touch display panel.
  • the two sides of the display screen 10 form curled portions.
  • the two sides of the glass layer 12 form the first curled portion 121 during the curling process
  • the two sides of the display layer 11 form the second curled portion 111 during the curling process.
  • the curled part of the display screen 10 extends to the back cover 40, and the back cover 40 can be connected to the glass layer 12 of the display screen 10.
  • the curling angle of the first curling portion 121 of the glass layer 12 in the display screen 10 may be 90°-180°, for example, in FIG. 6, the first curling portion of the glass layer 12 in the display screen 10
  • the curling angle 121 may be 155°, and the two sides of the glass layer 12 are curled from the display surface to the back cover 40, so that the left and right sides of the mobile phone 100 are both the glass layer 12.
  • the first curled portion 121 of the glass layer 12 may also be curled by 135°.
  • the curling angle of the first curling portion 121 may be any angle between 90°-180°.
  • the curling angle of the second curling portion 111 of the display layer 11 in the display screen 10 may be 90°-150°.
  • the second curling portion 111 of the display layer 11 in the display screen 10 The curling angle can be 135°, so that the left and right sides and part of the back of the electronic device have display areas, which avoids the problem of reducing the screen-to-body ratio due to the existence of two black borders on the left and right sides of the electronic device.
  • the curling angle of the second curling portion 111 of the display layer 11 in the display screen 10 can be any value between 150° and 180°.
  • the curling angle of the second curling portion of the display layer 11 can be Is 180°.
  • the range of the curling angle of the first curling portion 121 and the second curling portion 111 may include the endpoint value.
  • the endpoint value is included. 90° and end value 180°.
  • the second curled portion 111 of the display layer 11 in the display screen 10 is curled by 135°
  • the first curled portion 121 of the glass layer 12 is curled by 180° as an example. Description.
  • the top frame 21 and the bottom frame 23 may be metal frames.
  • the material of the top frame 21 and the bottom frame 23 may be aluminum alloy, stainless steel, steel-aluminum composite die-casting, titanium alloy .
  • the back cover 40 may be a glass back cover.
  • the top frame 21 and the bottom frame 23 are metal frames
  • the top frame 21 and the bottom frame 23 can be used as antenna radiators, but the display screen 10 of the electronic device is curled, so that the left and right sides of the electronic device are glass. Layer 12, so that the left and right sides of the electronic device cannot be used as antennas.
  • the frame length is 150mm, so the length of the metal frame that can be used as an antenna is reduced by about 30%, so there is not enough length to arrange all the antennas.
  • the metal layer is The curled portion is curled upwards, so that the metal layer in the display layer 11 will block the radiation aperture of the side antenna of the mobile phone 100, thereby greatly reducing the radiation efficiency of the antenna disposed in the side of the mobile phone 100.
  • the top frame 21 has a slit a and a slit b.
  • a and a slit b separate the top frame 21 into a first radiator 211, a second radiator 212, and a third radiator 213 located between the first radiator 211 and the second radiator 212.
  • the bottom frame 23 has a slit c and a slit d.
  • the slit c and the slit d separate the bottom frame 23 into a fourth radiator 231, a fifth radiator 232, and a fourth radiator 231 and a fifth radiator.
  • the sixth radiator 233 between the bodies 232.
  • the length L1 of the third radiator 213 and the sixth radiator 233 may be 50-60 mm, for example, the length of the third radiator 213 may be 53 mm, or the third radiator 213 The length can be 55mm.
  • the lengths of the third radiator 213 and the sixth radiator 233 may be the same or different.
  • the first radiator 211, the second radiator 212 and the third radiator may be 1-1.4 mm, for example, the first radiator 211, the second radiator 212, and the third radiator 213 and the metal middle plate 22 or
  • the minimum distance h1 between the display layers 11 may be 1.2 mm, or may also be 1.3 mm. This can ensure that the clearance of the first radiator 211, the second radiator 212, and the third radiator 213 can be 1-1.4 mm.
  • the minimum distance h2 between the fourth radiator 231, the fifth radiator 232, and the sixth radiator 233 and the metal middle plate 22 or the display layer 11 may be 1.2-1.4 mm, for example
  • the minimum distance h1 between the fourth radiator 231, the fifth radiator 232, and the sixth radiator 233 and the metal middle plate 22 or the display layer 11 may be 1.25 mm, or may also be 1.35 mm. In this way, it can be ensured that the clearance of the fourth radiator 231, the fifth radiator 232, and the sixth radiator 233 can be 1.2-1.4 mm.
  • the length L3 of the first radiator 211, the second radiator 212, the fourth radiator 231, and the fifth radiator 232 may be 8-10 mm, for example, the first radiator 211,
  • the length L3 of the second radiator 212, the fourth radiator 231 and the fifth radiator 232 may be 8.75 mm, or the length L3 of the first radiator 211, the second radiator 212, the fourth radiator 231 and the fifth radiator 232
  • the length L3 may be 9 mm.
  • the lengths of the first radiator 211, the second radiator 212, the fourth radiator 231, and the fifth radiator 232 may be the same or different.
  • the slit width L2 of the slit a, the slit b, the slit c, and the slit d may be 1-1.5 mm.
  • the slit width L2 of the slit a, the slit b, the slit c, and the slit d can be 1.2 mm, or the slit width L2 of the slit a, the slit b, the slit c, and the slit d can be 1.4 mm .
  • the fourth radiator 231, the fifth radiator 232, and the sixth radiator 233 are the radiation branches of the main antenna (Main Antenna) of the mobile phone 100, the fourth radiator 231, the fifth radiator 232, and the The headroom of the six radiator 233 is larger than the headroom of the first radiator 211, the second radiator 212, and the third radiator 213, which ensures that the main antenna of the mobile phone 100 has a greater radiation efficiency.
  • each of the gaps and the space between the frame and the metal middle plate can be injected with plastic material by nano injection molding, so that each frame and the metal middle plate form an integral structure.
  • the antenna in order to extend the length of the antenna, it also includes at least one extension branch.
  • four extension branches are respectively provided, namely: a first extension branch 21a, a The second extension branch 21b, the fourth extension branch 23a and the fifth extension branch 23b, wherein one end of the first extension branch 21a is electrically connected to the first radiator 211, and the other end of the first extension branch 21a extends to the display screen 10 and the rear In the space enclosed by the cover 40, the first extension branch 21a of the first antenna 201 is embedded inside the mobile phone.
  • the first radiator 211 and the first extension stub 21 a constitute a radiating stub of the first antenna 201.
  • One end of the second extension branch 21b is electrically connected to the second radiator 212, the other end of the second extension branch 21b extends into the space enclosed by the display screen 10 and the back cover 40, the second radiator 212 and the second extension branch 21b Compose the radiating stub of the second antenna 202.
  • One end of the fourth extension branch 23a is electrically connected to the fourth radiator 231, the other end of the fourth extension branch 23a extends into the space enclosed by the display screen 10 and the back cover 40, the fourth radiator 231 and the fourth extension branch 23a Compose the radiation stub of the fourth antenna 204.
  • One end of the fifth extension branch 23b is electrically connected to the fifth radiator 232, the other end of the fifth extension branch 23b extends into the space enclosed by the display screen 10 and the back cover 40, the fifth radiator 232 and the fifth extension branch 23b Compose the radiation branch of the fifth antenna 205.
  • the material of the first extension branch 21a, the second extension branch 21b, the fourth extension branch 23a and the fifth extension branch 23b may be the same as the material of the metal middle plate 22, the top frame 21 and the bottom frame 22 Or it can be different.
  • the materials of the first extension branch 21a, the second extension branch 21b, the fourth extension branch 23a, and the fifth extension branch 23b may include, but are not limited to, aluminum alloy, stainless steel, steel-aluminum composite die-cast plate or Titanium alloy.
  • the length of the antenna is extended on the one hand, thereby effectively compensating for the problem of insufficient antenna length
  • the increased first extension branch 21a, second extension branch 21b, fourth extension branch 23a and fifth extension branch 23b are located in the space enclosed by the display screen 10 and the back cover 40, and the first extension branch 21a,
  • the first radiator 211, the second radiator 212, the fourth radiator 231, and the fifth radiator 232 electrically connected to the second extension branch 21b, the fourth extension branch 23a, and the fifth extension branch 23b are located at the top and bottom of the mobile phone 100 In this way, the first radiator 211, the second radiator 212, the fourth radiator 231, and the fifth radiator 232 can radiate outwards, thereby ensuring the antenna radiation efficiency on the basis of extending the antenna.
  • the other ends of the first extension branch 21a, the second extension branch 21b, the fourth extension branch 23a, and the fifth extension branch 23b extend into the space enclosed by the display screen 10 and the back cover 40, as As shown in Figure 8, the other ends of the first extension branch 21a, the second extension branch 21b, the fourth extension branch 23a, and the fifth extension branch 23b are connected to the metal middle plate 22 for grounding (because the metal middle plate 22 and the circuit board 30 The grounding point is electrically connected), or it may be connected to the grounding point of the circuit board 30 to achieve grounding.
  • the first extension branch 21a, the second extension branch 21b, the fourth extension branch 23a, and the fifth extension branch 23b when the first extension branch 21a, the second extension branch 21b, the fourth extension branch 23a, and the fifth extension branch 23b are arranged in the space enclosed by the display screen 10 and the back cover 40, the first extension branch 21a , The second extension branch 21b, the fourth extension branch 23a, and the fifth extension branch 23b can be arranged close to the space enclosed by the second curled portion 111 of the display layer 11.
  • the first extension branch 21a, the second extension branch 21b, and the The four extending branches 23 a and the fifth extending branches 23 b may be wrapped by the second curled portion 111 of the display layer 11.
  • first extension branch 21a, the second extension branch 21b, the fourth extension branch 23a, and the fifth extension branch 23b may extend in a direction parallel to the axial direction of the second curled portion 111.
  • first extension branch 21a, the second extension branch 21b, the fourth extension branch 23a, and the fifth extension branch 23b may be arranged obliquely in the space enclosed by the display screen 10 and the back cover 40.
  • the first extension branch 21a, the second extension branch 21b, the fourth extension branch 23a, and the fifth extension branch 23b are connected to the first radiator 211, the second radiator 212, the fourth radiator 231, and the second radiator, respectively.
  • a T-shaped radiating branch can be formed.
  • the mobile phone 100 may include at least one antenna, for example, may include one or more antennas.
  • the mobile phone 100 may include 6 antennas, which may be: a first antenna 201, a second antenna 202, a third antenna 203, a fourth antenna 204, a fifth antenna 205, and a sixth antenna.
  • the first antenna 201, the second antenna 202, and the third antenna 203 may be located on the top of the mobile phone 100
  • the fourth antenna 204, the fifth antenna 205, and the sixth antenna 206 may be located on the bottom of the mobile phone 100.
  • the second antenna 202 and the third antenna 203 may be a diversity antenna (Div Antenna), and the first antenna 201 may be a WIFI antenna, a Bluetooth antenna, and a GPS antenna. That is, the first antenna 201 may be a dual-frequency antenna (WIFI antenna and Bluetooth). The antenna uses one frequency band, and GPS uses another frequency band).
  • the fifth antenna 205 and the sixth antenna 206 may be a main antenna (Main Antenna), and the fourth antenna may be a mid-to-high frequency multiple-input multiple-output (MIMO) antenna.
  • the fifth antenna 205 and the sixth antenna 206 are main antennas, the main antenna is located at the bottom of the mobile phone, so that the mobile phone 100 has a low Specific Absorption Rate (SAR).
  • SAR Specific Absorption Rate
  • the first antenna 201 may include: a first radiator 211, a first extension stub 21a, a first feed b1, a first feed point a1, and a first ground point c1, where the first feed point a1 And the first ground point c1 are electrically connected to the first extension stub 21a, the first feed source b1 feeds a high-frequency current to the first extension stub 21a through the first feeding point a1, and the high-frequency current is in the first extension stub 21a And the first radiator 211 is transformed to emit electromagnetic waves to the outside.
  • the first extension branch 21a and the first radiator 211 are radiation branches of the first antenna 201.
  • the second antenna 202 may include: a second radiator 212, a second extension branch 21b, a second feed source b2, a second feed point a2, and a second ground point c2. Both the second feed point a2 and the second ground point c2 are electrically connected to the second extension branch 21b.
  • the second feed source b2 is electrically connected to the second feed point a2, and the second extension branch 21b and the second radiator 212 are radiation branches of the second antenna 202.
  • the arrangement of the first extension stub 21a and the second extension stub 21b extends the length of the first antenna 201 and the second antenna 202, so as to satisfy more antennas.
  • the third antenna 203 may include: a third radiator 213, a third feed source b3, a third feed point a3, and a third ground point c3.
  • the third feed point a3 and the third ground point c3 are both connected to the third radiator 213, and the third feed source b3 is electrically connected to the third feed point a3.
  • the first antenna 201, the second antenna 202, and the third antenna 203 provided on the top of the mobile phone 100 respectively have a first feeding point a1, a second feeding point a2, and a third feeding point a3, so that the mobile phone
  • the antenna at the top of 100 has three independent feed ports.
  • One of the first antenna 201, the second antenna 202, and the third antenna 203 can be a low-frequency antenna, the other can be a medium-high frequency antenna, and the third antenna can be MIMO antennas covering medium and high frequencies, for example, the first antenna 201 and the third antenna 203 may be Div Antenna covering low, medium and high frequencies, and the second antenna 202 may be a MIMO antenna, or the second antenna 202 and the third antenna
  • the antenna 203 can be a diversity antenna covering low, medium and high frequencies.
  • the first antenna 201 can be a Bluetooth antenna (2400MHz), a WIFI antenna (2400MHz), and a GPS antenna.
  • the Bluetooth antenna, the WIFI antenna and the GPS antenna can share the first antenna 201,
  • the first antenna is 201 dual-band antenna.
  • the first antenna 201 or the second antenna 202 may be an antenna covering the 5G frequency band, such as the N77 frequency band (3300-4200MHz) and the N79 frequency band (4400-5000MHz) of the 5G frequency band, and one or two of the prior art are independent Compared with the antenna of the feed port, in the embodiment of the present application, because three independent feed ports are set, one more antenna can be designed that can cover the middle and high frequency bands, so that the design freedom of the top antenna of the mobile phone 100 is more Higher, the more frequency bands can be covered. It should be noted that, in the embodiment of the present application, the number of power feeding ports provided on the top of the mobile phone 100 includes but is not limited to three.
  • the fourth antenna 204 may include: a fourth radiator 231, a fourth extension branch 23a, a fourth feed source b4, a fourth feed point a4, and a fourth ground point c4.
  • the fourth feeding point a4 and the fourth grounding point c4 are both electrically connected to the fourth extension branch 23a.
  • the fourth extension branch 23a increases the length of the fourth antenna 204.
  • the fifth antenna 205 may include: a fifth radiator 232, a fifth extension branch 23b, a fifth feed source b5, a fifth feed point a5, and a fifth ground point c5. Both the fifth feed point a5 and the fifth ground point c5 are electrically connected to the fifth extension branch 23b.
  • the fifth extension branch 23b increases the length of the fifth antenna 205.
  • the sixth antenna 206 may include: a sixth radiator 233, a sixth feed source b6, a sixth feed point a6, and a sixth ground point c6. Both the sixth feeding point a6 and the sixth grounding point c6 are connected to the sixth radiator 233.
  • the fourth antenna 204, the fifth antenna 205, and the sixth antenna 206 provided at the bottom of the mobile phone 100 have a fourth feed point a4, a fifth feed point a5, and a sixth feed point a6, respectively, so that the mobile phone
  • the bottom antenna of 100 has three independent feeding ports.
  • the design of the bottom antenna of mobile phone 100 has a higher degree of freedom.
  • One of the fourth antenna 204, the fifth antenna 205 and the sixth antenna 206 can be a low frequency antenna, and the other can be a low frequency antenna.
  • the third antenna can be designed to cover the medium and high frequencies, so that the three antennas at the bottom of the mobile phone 100 can cover more frequency bands.
  • the fifth antenna 205 and the sixth antenna 206 may be main antennas, and the fourth antenna may be a MIMO antenna or a 5G frequency band (for example, N77 frequency band (3300-4200 MHz) and N79 frequency band (4400-5000 MHz)) antennas.
  • the fourth antenna may be a MIMO antenna or a 5G frequency band (for example, N77 frequency band (3300-4200 MHz) and N79 frequency band (4400-5000 MHz)) antennas.
  • each feed source and each feed point in FIG. 9 may be located on the circuit board 30, and each ground point may be electrically connected to the ground point of the metal middle plate 22 or the circuit board 30 to achieve grounding.
  • the third ground point c3 of the third antenna 203 when the third ground point c3 of the third antenna 203 is set, as shown in FIG. 9, the third ground point c3 is closer to the first radiator 211 than the second radiator 212, for example ,
  • the horizontal distance L4 between the third ground point c3 and the slit b may be 2.6mm, and the horizontal distance between the third ground point c3 and the slit a may be 53mm, or the third ground point of the third antenna 203 c3 can be close to the second radiator 212.
  • the third antenna 203 can interfere with the nearby radiator under different resonances. Reduced to ensure stable performance of the radiator close to the third ground point c3.
  • the sixth ground point c6 of the sixth antenna 206 may be as shown in FIG. 9. Compared with the distance between the sixth ground point c6 and the fifth radiator 232, the sixth ground point c6 is closer to the fourth radiator 231, for example , The horizontal distance between the sixth grounding point c6 and the slit d may be 2.6 mm, and the horizontal distance between the sixth grounding point c6 and the slit c may be 53 mm.
  • the sixth ground point c6 of the sixth antenna 206 may be close to the fifth radiator 232, and the sixth ground point c6 of the sixth antenna 206 may be close to the fourth radiator 231 or the fifth radiator 232, so as to be connected to the sixth radiator 232.
  • the performance of the radiator close to the location c6 is not easily affected by the sixth antenna 206.
  • the third antenna 203 may be a low-frequency antenna, and the working frequency band may be (700-960MHz), and the first antenna 201 and the second antenna 202 It can be a medium and high frequency antenna, the working frequency band can be 1805-2690MHz, so the third antenna 203 and the second antenna 202 can be MIMO antennas covering low, medium and high frequency bands, and the first antenna 201 can be a WIFI antenna covering (frequency band: 2400-2500MHz ) And GPS antenna (working frequency: 1575 ⁇ 100MHz) dual-frequency antenna. Or the first antenna 201 may be a medium and high frequency MIMO antenna.
  • the sixth antenna 206 may be a low-frequency antenna, and the fourth antenna 204 and the fifth antenna 205 may be medium and high-frequency antennas.
  • the sixth antenna 206 and the fifth antenna 205 may be To cover the main antenna of the low, medium and high frequency bands (for example, the low frequency is 700-960 MHz, the intermediate frequency is 1710-2200 MHz, and the high frequency is 2300-2700 MHz), the fourth antenna 204 may be a medium and high frequency MIMO antenna. Or the fourth antenna 204 may also be a dual-frequency antenna covering a WIFI antenna and a GPS antenna.
  • the types of the first antenna 201, the second antenna 202, the third antenna 203, the fourth antenna 204, the fifth antenna 205, and the sixth antenna 206 include but are not limited to the foregoing antennas.
  • the length H1 of the first extension branch 21a may be 10-25 mm, for example, the length H1 of the first extension branch 21a may be 23 mm, or the first extension branch 21a
  • the length H1 can be 11mm.
  • the length H2 of the second extension section 21b may be 10-25 mm, for example, the length H2 of the second extension section 21b may be 18 mm, or the length H1 of the first extension section 21a may be 22 mm.
  • the antenna length on the top of the mobile phone 100 is increased by at least 20-50 mm, thereby effectively compensating for the problem of insufficient antenna length.
  • the first extension stub 21a and the second extension stub 21b are the radiation stubs of the first antenna 201 and the second antenna 202, respectively, the first extension stub 21a and the second extension stub 21b are in the mobile phone
  • the clearance between the first extension branch 21a and the second extension branch 21b is not less than 0.5mm, for example, the second extension branch 21b and the inner wall of the display layer 11 (for example, the display layer 11 and the second curling portion 111 in FIG.
  • the minimum distance h3 between the inner side of the mobile phone can be 0.5 mm.
  • the length H4 of the fourth extension branch 23a may be 10-25 mm, for example, the length H4 of the fourth extension branch 23a may be 23 mm, or the length H4 of the fourth extension branch 23a It can be 11mm.
  • the length H3 of the fifth extension branch 23b may be 10-25 mm, for example, the length H3 of the fifth extension branch 23b may be 18 mm, or the length H3 of the fifth extension branch 23b may be 22 mm. In this way, the antenna length at the bottom of the mobile phone 100 is increased by at least 20-50 mm, thereby effectively compensating for the problem of insufficient antenna length at the bottom of the mobile phone 100.
  • the clearance between the fourth extension branch 23a and the fifth extension branch 23b is not less than 0.5 mm.
  • the minimum distance between the fourth extension branch 23a and the inner wall of the display layer 11 may be 0.5 mm, so as to ensure the fourth extension branch 23a
  • the fifth extension branch 23b has a clear area inside the mobile phone 100, so that the fourth extension branch 23a and the fifth extension branch 23b have good radiation efficiency.
  • each extension branch and the corresponding radiator may be connected by welding, clamping, fasteners (such as screws) or integral molding.
  • the first radiator 211 has a mounting portion 211a.
  • the end of the first extension branch 21a connected to the first radiator 211 has a mounting portion that can be inserted into the mounting portion.
  • the plug-in portion 211c on the 211a, the plug-in portion 211c and the mounting portion 211a are connected by fasteners (such as screws or bolts), so that the first extension branch 21a and the first radiator 211 are fixed.
  • connection between the four extension branches and the corresponding radiator can be, but not limited to, the above-mentioned connection manner of the mounting portion 211a and the insertion portion 211c, and other matching structures can also be adopted to realize the connection.
  • the first extension stub 21a, the second extension stub 21b, the third antenna 203 extension stub and the fourth extension stub 23a are in a suspended bridge structure in the mobile phone 100, for example, as shown in FIG.
  • one end of the first extension branch 21a is connected to the first radiator 211, and the other end is connected to the metal middle plate 22.
  • the first extension branch 21a is in a suspended bridge structure between the first radiator 211 and the metal middle plate 22.
  • each extension branch may be a suspended bridge structure formed by a part of the edge of the metal middle plate 22 extending toward the corresponding radiator. For example, as shown in FIG. 13, one side edge of the metal middle plate 22 is suspended.
  • the area of the metal middle plate 22 near the first radiator 211 is dug out a suspended bridge structure as the first extension branch 21a, so that one end of the first extension branch 21a is integrated with the metal middle plate 22, and the first grounding point c1 is located on the metal middle plate 22, so as to avoid grounding between the first extension branch 21a and the metal middle plate 22 through the provision of elastic pieces.
  • the feeding point structure when each feeding point is electrically connected to the radiator or the extension branch, the feeding point structure may be provided on the radiator or the extension branch.
  • the first extension The branch 21a is provided with a feed point structure 211b, and the first feed point a1 is electrically connected to an elastic piece a11.
  • the elastic piece a11 and the feed point structure 211b abut to achieve electrical connection.
  • the remaining feed points can also be connected with shrapnel, the radiator or extension branch is provided with a feed point structure that abuts the shrapnel, and each feed point abuts against the extension branch or radiator through the shrapnel and the feed point structure Electric connection.
  • connection structure 111a is provided on the display layer 11, and the circuit board 30 and the display layer 11 can be connected to the connection structure 111a by a fastener (such as a screw) to realize the connection.
  • a fastener such as a screw
  • the connection structure 111a of the display layer 11 is connected to the ground point of the circuit board 30 through a fastener, so that the display layer 11 is grounded.
  • the third antenna 203 may also include : The first tuning contact point d1, the first tuning contact point d1 is used to connect the third radiator 213 with a matching circuit.
  • the sixth antenna 206 may further include: a second tuning contact point d2, and the second tuning contact point d2 is used to connect the third radiator 213 with a matching circuit.
  • the first tuning contact point d1 and the second tuning contact point d2 may be conductive sheets connected to the third radiator 213 and the sixth radiator 233.
  • the connection positions of the first tuning contact point d1 and the second tuning contact point d2 with the third radiator 213 and the sixth radiator 233 are specifically set according to the tuning width.
  • the position where the first tuning contact point d1 is connected to the third radiator 213 can be close to the position where the third feeding point a3 is connected to the third radiator 213, In this way, high radiation efficiency can be obtained.
  • the sixth antenna 206 is a low-frequency antenna of the main antenna and the third antenna 203 is a MIMO antenna
  • the tuning range of the MIMO antenna is smaller than that of the main antenna, so the sixth radiator 233
  • the distance to the connection point of the second tuning contact point d2 and the sixth feeding point a6 is greater than the distance between the third radiator 213 and the connection point of the first tuning contact point d1 and the third feeding point a3.
  • the third radiator 213 is electrically connected to the first tuning circuit 213a through the first tuning contact point d1.
  • the sixth radiator 233 is electrically connected to the second tuning circuit 216a through the second tuning contact point d2.
  • the first tuning circuit 213a the third antenna 203 can be switched to the path corresponding to different low frequency bands, so that the bandwidth of the third antenna 203 can be Cover the entire bandwidth of 700-960MHz.
  • the second tuning circuit 216a the sixth antenna 206 can be switched to paths corresponding to different low frequency bands, so as to ensure that the bandwidth of the sixth antenna 206 can cover the entire bandwidth of 700-960 MHz.
  • the first tuning circuit 213a and the second tuning circuit 216a may include a tuning switch and at least one matching circuit, one end of the matching circuit is connected to the tuning switch, and the other end of the matching circuit is grounded.
  • the specific structure of the tuning switch and the matching circuit is not limited.
  • the tuning switch may be one switch or multiple switches.
  • any switch may be a single-pole multi-throw switch with one input and multiple outputs, or a multi-pole multi-throw switch with multiple inputs and multiple outputs, which is not limited in this application.
  • Any switch can be connected by one or more switches connected in series and/or in parallel, which is not limited in this application.
  • the matching circuit can use one capacitor, or one inductor, or multiple capacitors connected in series, or multiple inductors connected in series, or multiple capacitors connected in parallel, or multiple inductors connected in parallel, or at least one connected in series
  • the capacitor and at least one inductor, or at least one group of capacitors and inductors connected in series connected in parallel, are not limited in this application.
  • the first tuning circuit 213a includes a first tuning switch 2135 and four matching circuits, which are respectively a first matching circuit 2131, a second matching circuit 2132, a third matching circuit 2133, and a fourth matching circuit.
  • Circuit 2134 where the first tuning switch 2135 can be a single-pole four-throw switch (for example, SP4T), the first tuning switch 2135 has four switching paths, for example, RF1, RF2, RF3 and RF4, the first matching circuit 2131, the first The second matching circuit 2132, the third matching circuit 2133, and the fourth matching circuit 2134 correspond to RF1, RF2, RF3, and RF4, respectively.
  • the switch states corresponding to B8, B5, B20, and B28 and the first matching circuit 2131 The relationship between the second matching circuit 2132, the third matching circuit 2133, and the fourth matching circuit 2134 is shown in Table 1:
  • the first matching circuit 2131 0.3pF B28b All OFF open circuit B20 RF2
  • Second matching circuit 2132 47nH B5 RF3
  • the third matching circuit 2133 30nH B8 RF4
  • Fourth matching circuit 2134 18nH
  • the first tuning switch 2135 is switched to RF4.
  • the fourth matching circuit 2134 connected to the path of RF4 has an inductance of 18 nH. Among them, the greater the connected inductance, the lower the resonance frequency.
  • B28a is the frequency band covered when the first tuning switch 2135 is switched to RF1 and a 0.3pF capacitor is connected
  • B28a is the frequency band covered by the sixth antenna 206 after all paths of the first tuning switch 2135 are disconnected.
  • the bandwidth of the sixth antenna 206 covers the entire bandwidth of the low frequency band (700-960 MHz) through the foregoing four matching circuits.
  • scenario 1 and scenario 2 antennas are taken as examples for simulation testing.
  • the glass layer 12 of the display screen 10 is curled by 180°, and the display layer 11 is curled by 135°, and the screen-to-body ratio is as high as 95%.
  • the total length of the bottom frame 23 of the mobile phone 100 is 73.5 mm
  • the width of the slit c and the slit d is 1.5 mm
  • the length of the sixth radiator 233 is 53 mm
  • the length of the fourth radiator 231 and the fifth radiator 232 The length of the fourth extension stub 23a and the fifth extension stub 23b is 14.25 mm, so the antenna radiation length of the fifth antenna 205 and the fourth antenna 204 is 23 mm.
  • the sixth ground point c6 of the sixth antenna 206 is located close to the fourth radiator 231.
  • the sixth antenna 206 is set as a low-frequency antenna, and the sixth antenna 206 is connected to a tuning circuit and has a frequency tuning function. Each tuning state needs to cover a bandwidth of about 80 MHz.
  • the efficiency of the sixth antenna 206 in different tuning states is shown in FIG. 18, and FIG. 18 shows the antenna simulation efficiency of the sixth antenna 206 in different tuning states. It can be seen from Figure 18 that the average efficiency of the sixth antenna 206 in B28a, B28b, B20, B5, and B8 is higher than -5.5dB on average, while the average efficiency of the existing low-frequency antenna is -7dB. Therefore, in the embodiment of the application The average efficiency of the sixth antenna 206 under different tunings is higher than the average efficiency of the existing low-frequency antenna by 1.5 dB.
  • the fourth antenna 204 is set as a high-frequency antenna
  • the fifth antenna 205 is set as a mid- and high-frequency antenna.
  • FIG. 19 shows the radiation of the fourth antenna 204 and the fifth antenna 205 in different tuning states of the sixth antenna 206 Efficiency, as can be seen in FIG. 19, the radiation efficiency of the fourth antenna 204 can cover 2300-2690 MHz under different tuning states of the sixth antenna 206. In the 2300-2690 MHz frequency band, the average efficiency of the fourth antenna 204 is -4.5 dB.
  • the radiation efficiency of the fifth antenna 205 can cover 1710-2690 MHz under different tuning states of the sixth antenna 206.
  • the efficiency of the fifth antenna 205 decreases near B12 (2600MHz). This is because the ground point of the sixth antenna 206 is far away from the fifth antenna 205, and the sixth antenna 206 During tuning, the stability of the fifth antenna 205 will be affected.
  • the fifth antenna 205 has an average efficiency of B3 (1800MHz), B1 (2100MHz), and B7 (2600MHz) in the 1710-2690MHz frequency band, after accounting for switching and device losses.
  • the fourth antenna 204 is a high-frequency antenna and the fifth antenna 205 is a medium-high frequency antenna
  • the fourth antenna 204 and the fifth antenna 205 are covered by the small clearance and the curled portion of the display layer 11. , Also has good bandwidth and radiation efficiency.
  • the fourth antenna 204 is set as a medium and high frequency antenna, for example, the fourth antenna 204 is set as a medium and high frequency MIMO antenna.
  • FIG. 20 shows the radiation efficiency when the fourth antenna 204 is set as a medium and high frequency MIMO antenna. It can be seen in FIG. 20 that the radiation efficiency of the fourth antenna 204 can cover the frequency band of 1805-2690 MHz. Wherein, when the fourth antenna 204 is set as a medium and high frequency MIMO antenna, the bandwidth of the fourth antenna 204 is expanded, so the average radiation efficiency of the fourth antenna 204 is lower than that of the medium and high frequency antenna in FIG. 19 . It can be seen in Fig.
  • the fourth antenna 204 has an average efficiency higher than -7.5dB in the receiving (Rx) band of B3 (1800MHz), and the efficiency of the fourth antenna 204 in the Rx band of B1 (2100MHz)
  • the average efficiency is -7.3dB
  • the average efficiency in the Rx band of B7 (2600MHz) is -6.5dB. Therefore, when the fourth antenna 204 is set as a medium and high frequency MIMO antenna, the radiation efficiency of the fourth antenna 204 is set as a high frequency antenna in FIG. 19 and the radiation efficiency of the medium and high frequency antenna in FIG. 19 is reduced by about 2 dB, but for the MIMO antenna , The radiation efficiency drop by 2dB will not affect the normal operation of the antenna.
  • the radiation efficiency of the fifth antenna 205 configured as a medium and high frequency antenna is greater than that of the fourth antenna 204 configured as a medium and high frequency antenna. Therefore, the fifth antenna 205 can be the main antenna, covering the medium and high frequency of the main antenna.
  • the fourth antenna 204 may be a medium and high frequency MIMO antenna, because the radiation efficiency of the MIMO antenna may be 3dB lower than that of the main antenna.
  • FIG. 21 shows the initial resonance of the fourth antenna 204 and the fifth antenna 205 as the medium and high frequency antenna and the sixth antenna 206 as the low frequency antenna.
  • S3, 3 are the return loss curves of the sixth antenna 206.
  • S1,1 is the return loss curve of the fourth antenna 204
  • S2,2 is the return loss curve of the fifth antenna 205.
  • the sixth antenna 206 is a low-frequency antenna
  • the resonance is at 0.84 GHz
  • the fourth antenna 204 is a medium-high frequency antenna
  • the resonance is at 2.15 GHz.
  • the fifth antenna 205 is a medium and high frequency antenna, there are two resonances, respectively at 2.03 GHz and 2.93 GHz.
  • a low-frequency antenna needs a length of about 70mm to generate a 0.84GHz low-frequency resonance.
  • the length of the sixth radiator 233 of the sixth antenna 206 is 53mm, but it excites a 0.84GHz resonance. Therefore, in addition to the sixth radiator 233, the sixth antenna 206 also uses other radiators.
  • Figure 22 shows the current distribution of the sixth antenna 206 at low frequency resonance (0.84 GHz).
  • Figure 22 shows that the fifth radiator 232, the fifth extension branch 23b and the sixth radiator 233 form currents in the same direction.
  • the 1.5mm gap c between the fifth radiator 232 and the sixth radiator 233 does not block the distribution of in-phase current, so when the sixth antenna 206 radiates, the sixth antenna 206 uses the Five-antenna 205 radiation unit.
  • the sixth radiator 233, the fifth radiator 232, and the fifth extension branch 23b are combined so that the sixth antenna 206 excites a resonance of 0.84 GHz at a length of 53 mm. Therefore, in the embodiments of the present application, compared with the prior art, the length of the low-frequency antenna is shortened.
  • Figure 23 shows the sixth antenna 206 at low frequency resonance (0.84GHz), the middle frame 20, the left curled part of the display layer 11 in the display screen 10, the frame (for example, the top frame 21, the bottom frame 23 and each extension branch)
  • the current distributions of the curled side and the frame of the display layer 11 are also in phase, forming a loop-shaped current distribution.
  • the main radiation is floor radiation (that is, the metal plate where the low-frequency antenna is grounded). ), so this current distribution is conducive to the radiation of the low-frequency antenna.
  • FIG. 24 shows the initial radiation efficiency when the fourth antenna 204 is set as a medium and high frequency antenna and the efficiency when the fourth antenna 204 is set as a WIFI antenna and a GPS antenna.
  • the resonance of the fourth antenna 204 is 2.15. GHz, but at 1.54GHz, the initial radiation efficiency of the fourth antenna 204 reaches -2.3dB. Therefore, the fourth antenna 204 has good bandwidth characteristics.
  • the fourth antenna 204 can be set as a mid-high frequency antenna, GPS antenna and WIFI antenna can also be set, the fourth antenna 204 is not the usual inverted F antenna (Invert F Antenna, IFA), because of the 23mm antenna Length, in the GPS frequency band (1557-1601MGHz), there will be no initial radiation efficiency higher than -2.0dB.
  • IFA Invert F Antenna
  • FIG. 25 shows the current distribution of the fourth antenna 204 at resonance.
  • the fourth antenna 204 forms a half-wavelength current distribution on the bottom frame 23 of the mobile phone 100, which shows that the radiation of the fourth antenna 204 comes from The radiation units of the sixth radiator 233 and the fourth antenna 204, of which the main radiation comes from the sixth radiator 233, so in this embodiment of the application, the fourth antenna 204 uses the radiation unit of the sixth antenna 206, so even the fourth antenna
  • the fourth extension branch 23a in the antenna 204 is blocked by the curled part of the display layer 11, the radiation efficiency of the fourth antenna 204 is relatively high, and the fourth extension branch 23a and the fourth radiator 231 are not the main radiation units of the fourth antenna 204.
  • Fig. 26 shows the current distribution of the fifth antenna 205 at resonance.
  • the fifth antenna 205 forms a current pattern of 3/4 ⁇ on the sixth radiator 233, indicating that the fifth antenna 205 borrows the sixth antenna.
  • the radiator 233, the fifth extension branch 23b and the fifth radiator 232 connected to the fifth feed point a5 in the fifth antenna 205 are not the main radiation unit of the fifth antenna 205, and the main radiation unit of the fifth antenna 205 is the The six radiators 233 and the fifth antenna 205 multiplex the branches of the sixth antenna 206 to radiate.
  • the fourth antenna 204 and the fifth antenna 205 use the radiating stubs of the sixth antenna 206 to overcome the problem of the antenna efficiency being lowered by the curling part blocking the antenna when the display screen 10 is curled.
  • the sixth antenna 206 borrows the radiation stub of the fifth antenna 205, so that the length of the sixth antenna 206 is reduced.
  • FIG. 27 shows the efficiency and isolation curves when the fourth antenna 204 and the fifth antenna 205 are set as two medium and high frequency antennas, and the sixth antenna 206 is set as a low frequency antenna.
  • S3 and 3 are the sixth antennas.
  • the return loss curve of the antenna 206 plus the matching circuit S2,2 is the return loss curve of the fifth antenna 205 plus the matching circuit, S1,1 is the return loss curve of the fourth antenna 204 plus the matching circuit, S1,2 is the first Isolation curve of five antenna 205 and fourth antenna 204.
  • the worst isolation between the fourth antenna 204 and the fifth antenna 205 is at the point 1.837GHz, and the isolation is -14.6dB.
  • the isolation of the fourth antenna 204 and the fifth antenna 205 is less than -14.6dB.
  • the isolation is only -6dB. Therefore, the embodiment of the present application When the fourth antenna 204 and the fifth antenna 205 are medium and high frequency antennas of the same frequency, there is good isolation between the two antennas.
  • the mobile phone 100 may further include: at least one high-frequency antenna.
  • the number of high-frequency antennas is two, namely the seventh antenna 207 and the eighth antenna 208.
  • the mobile phone 100 may further include: a seventh antenna 207 and an eighth antenna.
  • the antenna 208 where the seventh antenna 207 may include: a seventh radiator 214, a seventh feed point a7, a seventh feed source b7, and a seventh ground point c7, where the seventh radiator 214 and the seventh feed point c7 The point a7 is electrically connected to the seventh ground point c7, and the seventh feed source b7 feeds a high-frequency current to the seventh radiator 214 through the seventh feed point a7.
  • the seventh radiator 214 may be disposed along the inner side of the first extension branch 21a (that is, the side of the first extension branch 21a facing the second extension branch 21b).
  • the minimum distance between the seventh radiator 214 and the first extension branch 21a is greater than or equal to 0.5 mm, which ensures that the clearance of the seventh radiator 214 is greater than or equal to 0.5 mm.
  • the eighth antenna 208 may include: an eighth radiator 215, an eighth feed point a8, an eighth feed source b8, and an eighth ground point c8, where the eighth radiator 215 and the eighth feed point a8 It is electrically connected to the eighth ground point c8, and the eighth feed source b8 feeds a high-frequency current to the eighth radiator 215 through the eighth feed point a8.
  • the eighth radiator 215 may be arranged along the inner side of the second extension branch 21b (that is, the side of the second extension branch 21b facing the first extension branch 21a). The minimum distance between the eighth radiator 215 and the second extension branch 21b is greater than or equal to 0.5 mm, which ensures that the clearance of the eighth radiator 215 is greater than or equal to 0.5 mm.
  • the seventh antenna 207 and the eighth antenna 208 have corresponding feeding points, so that the top antenna of the mobile phone 100 has at least 5 independent feeding ports, which makes the antenna pattern richer and the antenna setting freedom higher.
  • the seventh antenna 207 and the eighth antenna 208 may be WIFI 5G antennas, where the working frequency band of the WIFI 5G antenna may be (4900-5900MHz), or the seventh antenna 207 and the eighth antenna 208 may be an antenna covering the 5G frequency band.
  • the operating frequency bands of the seventh antenna 207 and the eighth antenna 208 may be (3300-3600MHz) and (4800-5000MHz).
  • the seventh antenna 207 and the The working frequency band of the eight antenna 208 includes, but is not limited to, the frequency band above or below 6 GHz in the 5G frequency band.
  • FIG. 30 shows the radiation efficiency when the seventh antenna 207 is a WIFI 5G antenna. As shown in FIG. 30, the average efficiency in the entire frequency band is higher than -5dB. Therefore, when the seventh antenna 207 is located inside the mobile phone 100, the seventh antenna 207 has good radiation efficiency.
  • the operating frequency bands of the seventh antenna 207 and the eighth antenna 208 are relatively high, so these two antennas do not disturb the existing three antennas. In this way, the seventh antenna 207 and the eighth antenna 208 are more suitable for 5G system antennas (3.3-5 GHz).
  • the positions of the seventh antenna 207 and the eighth antenna 208 include but are not limited to being along the inner side of the first extension stub 21a and the second extension stub 21b, for example, it can also be along The fourth extension branch 23a and the fifth extension branch 23b, or the seventh antenna 207, can be arranged along the inner side of the first extension branch 21a, the second extension branch 21b, the fourth extension branch 23a, and the fifth extension branch 23b, respectively.
  • the ninth antenna and the tenth antenna have corresponding feeding points, so that the antenna at the top of the mobile phone 100 has 5 independent feeding ports, the antenna at the bottom of the mobile phone 100 has 5 independent feeding ports, and 10 can be set in the mobile phone 100.
  • the seventh feeding point a7 and the eighth feeding point a8 of the seventh antenna 207 and the eighth antenna 208 may be located on the circuit board 30, and the seventh ground point c7 and the eighth ground point c8 It can be connected to the grounding point of the circuit board 30, or connected to the metal middle plate 22 for grounding.
  • the seventh antenna 207 and the eighth antenna 208 can be suspended in the mobile phone 100, or the seventh antenna 207 and the eighth antenna 208 can be located on the circuit board 30, or the seventh antenna 207 and the eighth antenna 208 can be suspended.
  • connection should be understood in a broad sense.
  • it can be a fixed connection or Indirect connection through an intermediate medium can be the internal communication between two elements or the interaction between two elements.
  • connection should be understood according to specific circumstances.

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Abstract

本申请实施例提供一种天线组件和具有卷曲屏的电子设备，电子设备包括手机、平板电脑等具有天线的移动或固定终端，本申请实施例提供的电子设备中，位于电子设备金属顶边框或金属底边框的天线辐射体以及延伸到电子设备内且与天线辐射体相连的延伸枝节，天线的长度得以延长，确保了天线辐射效率，解决了现有手机中由于可用作天线的金属边框减小而导致手机上可布置的天线长度不足的问题。

Description

一种天线组件和具有卷曲屏的电子设备
本申请要求于2019年08月22日提交中国专利局、申请号为201910780584.1、申请名称为“一种天线组件和具有卷曲屏的电子设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉终端技术领域，特别涉及一种天线组件和具有卷曲屏的电子设备。
背景技术
手机等智能终端需通过运营商提供的移动通信网络实现通信，其还能够通过无线保真(Wireless Fidelity，WIFI)、蓝牙、红外等多种方式实现智能设备之间的通信连接，对于手机而言，通信信号是通过天线实现收发的，由于手机的通信方式多样，因此，在手机内部就需要设置比较多的天线。
目前，天线在手机中设置时，如图1所示，具体将手机金属边框1的顶部和底部经过断缝，分别形成第一天线1a和第二天线1b，其中，第一天线1a包括金属顶边框和部分金属侧边框，第二天线1b包括金属底边框和部分金属侧边框。
当手机的侧边框为非金属边框时，例如，手机的侧边为玻璃边框，这样可用作天线的金属边框总长度减小，从而造成手机上没有足够的长度空间布置所有的天线。
发明内容
本申请提供一种天线组件和具有卷曲屏的电子设备，延长了天线的长度，确保了天线的辐射效率，解决了现有手机中由于可用作天线的金属边框减小而导致手机上可布置的天线长度不足的问题。
本申请实施例第一方面提供一种天线组件，应用于电子设备，其中，所述天线组件包括：第一天线，所述第一天线包括：第一辐射体、第一延伸枝节以及与所述第一延伸枝节电连接的第一馈电点和第一接地点；所述第一延伸枝节的一端与所述第一辐射体相连，所述第一延伸枝节的另一端延伸到所述电子设备的内部，所述第一辐射体位于所述电子设备的金属顶边框或金属底边框。
通过第一天线包括第一辐射体以及与第一辐射体相连的第一延伸枝节，第一辐射体位于电子设备的金属顶边框或金属底边框，这样第一辐射体可以向外辐射电磁炉，确保第一天线的辐射效率。通过第一延伸枝节延伸到电子设备内，这样电子设备的侧边为非金属边框时，第一延伸枝节的设置延长了第一天线的长度，确保了第一天线具有足够的长度，保证电子设备可布置足够长的天线，从而解决了现有手机中由于可用作天线的金属边框减小而导致手机上可布置的天线长度不足的问题。
在一种可能的实现方式中，还包括：第二天线，所述第二天线至少包括第二辐射体、第二延伸枝节以及与所述第二延伸枝节电连接的第二馈电点和第二接地点，所述第二延伸枝节的一端与所述第二辐射体相连，所述第二延伸枝节的另一端延伸到所述电子设备的内 部。
所述第一辐射体位于所述金属顶边框的一端，所述第二辐射体位于所述金属顶边框的另一端，或者，
所述第一辐射体位于所述金属底边框的一端，所述第二辐射体位于所述金属底边框的另一端。或者，第一辐射体位于金属顶边框的一端，第二辐射体位于金属底边框的一端，或者，第一辐射体位于金属底边框的一端，第二辐射体位于金属顶边框的一端。
通过设置第二延伸枝节，这样第二延伸枝节延长了第二天线的长度，确保第二天线具有足够的长度。
在一种可能的实现方式中，还包括：第三天线，所述第三天线至少包括：第三辐射体以及与所述第三辐射体电连接的第三馈电点和第三接地点。
所述第三辐射体位于所述第一辐射体和所述第二辐射体之间，所述第三辐射体的两端分别与所述第一辐射体和所述第二辐射体之间具有断缝。
这样第三天线可以借用第一天线或第二天线的辐射枝节，第一天线和第二天线可以借用第三天线的辐射体进行辐射，确保第三天线、第一天线和第二天线在长度较小时激励起对应的谐振频率。
在一种可能的实现方式中，还包括：第四天线，所述第四天线至少包括：第四辐射体、第四延伸枝节以及与所述第四延伸枝节电连接的第四馈电点和第四接地点。
所述第四延伸枝节的一端与所述第四辐射体相连，所述第四延伸枝节的另一端延伸到所述电子设备的内部，所述第四辐射体和所述第一辐射体中的其中一个位于所述金属顶边框，另一个位于所述金属底边框。
通过第四延伸枝节，延伸了第四天线的长度，确保电子设备内可布置更多的天线。
在一种可能的实现方式中，还包括：第五天线，所述第五天线至少包括第五辐射体、第五延伸枝节以及与所述第五延伸枝节电连接的第五馈电点和第五接地点，所述第五延伸枝节的一端与所述第五辐射体相连，所述第五延伸枝节的另一端延伸到所述电子设备的内部。
所述第四辐射体位于所述金属顶边框的一端，所述第五辐射体位于所述金属顶边框的另一端，或者，所述第四辐射体位于所述金属底边框的一端，所述第五辐射体位于所述金属底边框的另一端。或者，第四辐射体、第五辐射体、第一辐射体和第二辐射体中的其中一个位于金属布顶边框的一端，另一端位于金属顶边框的另一端，第三个位于金属底边框的一端，第四个位于金属底边框的另一端。
通过第五延伸枝节，延伸了第五天线的长度，确保电子设备内可布置足够长的天线。
在一种可能的实现方式中，还包括：第六天线，所述第六天线至少包括：第六辐射体以及与所述第六辐射体电连接的第六馈电点和第六接地点。
所述第六辐射体位于所述第四辐射体和所述第五辐射体之间，所述第六辐射体的两端分别与所述第四辐射体和所述第五辐射体之间具有断缝。通过设置第六天线，第六天线的辐射体位于第五天线和第四天线，这样第六天线可以借用第四天线或第五天线的辐射枝节，第四天线和第五天线可以借用第六天线的辐射体进行辐射，确保第六天线、第五天线和第四天线在长度较小时激励起对应的谐振频率。
在一种可能的实现方式中，所述第三天线还包括：第一调谐电路，所述第一调谐电路 的一端通过第一调谐接触点与所述第三辐射体电连接，所述第一调谐电路的另一端接地。
所述第六天线还包括：第二调谐电路，所述第二调谐电路的一端通过第二调谐接触点与所述第六辐射体电连接，所述第二调谐电路的另一端接地。
通过第一调谐电路可以使得第三天线作为低频天线时能覆盖低频频段的全部带宽，通过第二调谐电路可以使得第六天线作为低频天线时能覆盖低频频段的全部带宽。
在一种可能的实现方式中，所述第一调谐电路和所述第二调谐电路板均包括调谐开关和至少一个匹配电路，所述匹配电路的一端与所述调谐开关电连接，所述匹配电路的另一端接地。通过调谐开关可以将第三天线和第六天线切换到不同负载的匹配路径上，从而实现第三天线和第六天线覆盖更多的带宽。
在一种可能的实现方式中，所述第一辐射体、所述第二辐射体和所述第三辐射体为所述金属顶边框通过断开两个断缝而形成的三个金属边框。
所述第四辐射体、第五辐射体和第六辐射体为所述金属底边框通过断开两个断缝而形成的三个金属边框。
这样，金属顶边框可以作为第一辐射体、所述第二辐射体和所述第三辐射体向外发射电磁波，金属底边框可以作为第四辐射体、第五辐射体和第六辐射体，这样避免在电子设备内额外设置天线辐射体。另一方面金属顶边框和金属底边框作为天线辐射体时，由于金属顶边框和金属底边框位于电子设备的顶端和底端，所以具有较好的辐射效率。
在一种可能的实现方式中，所述第一延伸枝节、所述第二延伸枝节、所述第四延伸枝节和所述第五延伸枝节在所述电子设备内呈悬空的桥式结构。
这样确保了第一延伸枝节、所述第二延伸枝节、所述第四延伸枝节和所述第五延伸枝节在所述电子设备内具有较好的净空。
在一种可能的实现方式中，所述第一延伸枝节、所述第二延伸枝节、所述第四延伸枝节和所述第五延伸枝节为所述电子设备内的金属中板分别朝向所述金属顶边框和所述金属底边框延伸形成的四个金属枝节。
这样金属中板与所述第一延伸枝节、所述第二延伸枝节、所述第四延伸枝节和所述第五延伸枝节一体成型，第一延伸枝节、所述第二延伸枝节、所述第四延伸枝节和所述第五延伸枝节的一端通过金属中板实现接地，从而避免延伸枝节与金属中板之间通过设置弹片而实现接地。
在一种可能的实现方式中，所述第一延伸枝节、所述第二延伸枝节、所述第四延伸枝节和所述第五延伸枝节的长度为10-25mm。
在一种可能的实现方式中，所述第一辐射体、所述第二辐射体、所述第四辐射体和所述第五辐射体的长度为8-10mm。这样确保第一天线、第二天线、第四天线和第五天线可以作为中高频天线。
在一种可能的实现方式中，所述第三辐射体和所述第六辐射体的长度为50-60mm。这样可以确保第三辐射体和第六辐射体可以作为低频天线。
在一种可能的实现方式中，所述第一辐射体、所述第二辐射体和所述第三辐射体的净空为1-1.4mm。
所述第四辐射体、所述第五辐射体和所述第六辐射体的净空为1.2-1.4mm。
所述第一延伸枝节、所述第二延伸枝节、所述第四延伸枝节和所述第五延伸枝节的净 空不小于0.5mm。这样确保各个辐射体和延伸枝节工作时具有一定的净空区域，使得各个辐射体和延伸枝节的辐射效率更高。
在一种可能的实现方式中，所述第三辐射体的两端与所述第一辐射体和所述第二辐射体之间的断缝的缝宽为1-1.5mm。这样确保第三辐射体的两端与第一辐射体和第二辐射体的一端在断缝处形成容性加载，从而使得第三天线可以借用第一天线或第二天线的辐射枝节，第一天线和第二天线可以借用第三天线的辐射枝节。
所述第六辐射体的两端与所述第四辐射体和所述第五辐射体之间的断缝的缝宽为1-1.5mm。这样确保第六辐射体的两端与第四辐射体和第五辐射体的一端在断缝处形成容性加载，从而使得第六天线可以借用第四天线或第五天线的辐射枝节，第四天线和第五天线可以借用第六天线的辐射枝节。
在一种可能的实现方式中，还包括：至少一个位于所述电子设备内的高频天线，每个所述高频天线包括高频辐射体以及与所述高频辐射体电连接的馈电点和接地点。
通过设置至少一个高频天线，扩充了天线所覆盖的高频频段，实现高频段的通信需求。
在一种可能的实现方式中，所述高频天线位于所述第一天线辐射枝节、所述第二天线辐射枝节、所述第四天线辐射枝节或所述第五天线辐射枝节的内侧。
所述高频天线的净空大于等于0.5mm。这样确保高频天线的辐射效率较高。
在一种可能的实现方式中，所述第三天线为低频天线，所述第一天线和所述第二天线为中高频天线，所述第一天线和所述第二天线借用所述第三天线的辐射体，所述第三天线借用所述第一天线或所述第二天线的辐射枝节。这样第一天线和第二天线中的其中一个与第三天线可以作为主天线，第一天线和第二天线中的另一个可以作为中高频的MIMO天线或WIFI天线。
所述第六天线为低频天线，所述第四天线和所述第五天线为中高频天线，所述第五天线和所述第四天线借用所述第六天线的辐射体，所述第六天线借用所述第四天线或第五天线的辐射枝节。这样第四天线和第五天线中的其中一个与第六天线可以作为分集天线，第五天线和第四天线中的另一个可以作为中高频的MIMO天线、WIFI天线或GPS天线。
本申请实施例第二方面提供一种具有卷曲屏的电子设备，至少包括：卷曲屏、后盖、位于所述卷曲屏和所述后盖之间的中框，以及上述任一所述的天线组件，所述中框的顶边框和底边框中的至少一个为金属边框。
通过包括上述天线组件以及将所述中框的顶边框和底边框中的至少一个为金属边框，这样，金属边框可以作为天线组件中天线的辐射体，天线组件中的延伸枝节可以延长天线的长度，从而使得电子设备的侧边框为非金属边框时，确保天线具有足够的长度，避免金属边框减少而导致可布置的天线长度不足的问题，解决了现有手机中由于可用作天线的金属边框减小而导致手机上可布置的天线长度不足的问题。
在一种可能的实现方式中，所述中框包括金属中板和位于金属中板两端的金属顶边框和金属底边框，所述金属中板位于所述卷曲屏和所述后盖围成的空间内，所述金属顶边框和所述金属底边框分别位于所述卷曲屏和所述后盖的顶端和底端。
在一种可能的实现方式中，所述金属顶边框和所述金属底边框上具有至少两个断缝，所述至少两个断缝将所述金属顶边框分隔形成所述天线组件的第一辐射体、第二辐射体以及位于所述第一辐射体和所述第二辐射体之间的第三辐射体。
所述至少两个断缝至少将所述金属底边框分割形成所述天线组件的第四辐射体、第五辐射体以及位于所述第四辐射体和所述第五辐射体之间的第六辐射体。
在一种可能的实现方式中，所述卷曲屏的两侧具有朝向所述后盖卷曲形成的卷曲部，所述天线组件中的第一延伸枝节、第二延伸枝节、第四延伸枝节和第五延伸枝节延伸到所述卷曲屏与所述后盖围成的空间内。这样电子设备的左右两个侧面为显示屏，实现了电子设备高屏占比。确保了电子设备中金属边框减少时仍可布置足够长的天线。
在一种可能的实现方式中，所述金属中板的两侧边缘分别朝向所述金属顶边框和所述金属底边框延伸形成所述第一延伸枝节、所述第二延伸枝节、所述第四延伸枝节和所述第五延伸枝节。这样金属中板与所述第一延伸枝节、所述第二延伸枝节、所述第四延伸枝节和所述第五延伸枝节一体成型，第一延伸枝节、所述第二延伸枝节、所述第四延伸枝节和所述第五延伸枝节的一端可以通过金属中板实现接地，从而避免延伸枝节与金属中板之间通过设置弹片而实现接地。
在一种可能的实现方式中，所述卷曲屏包括玻璃层和显示层，所述玻璃层的两侧具有朝向所述后盖卷曲的第一卷曲部，所述显示层的两侧具有朝向所述后盖卷曲的第二卷曲部。
在一种可能的实现方式中，所述第一卷曲部的卷曲角度为90-180°。
所述第二卷曲部的卷曲角度为90-150°。这样电子设备的左右两个侧面以及部分背面均有显示区域，避免了电子设备的左右两个黑边的存在而降低屏占比的问题，本申请实施例实现电子设备的高屏占比。
在一种可能的实现方式中，所述后盖为玻璃后盖。这样玻璃后盖对电子设备内设置的天线的干扰减小，确保电子设备内的天线具有更大的辐射效率。
附图说明
图1为现有电子设备中金属边框上形成的天线的示意图；
图2为本申请一实施例提供的电子设备的立体结构示意图；
图3为本申请一实施例提供的电子设备的拆分结构示意图；
图4为本申请一实施例提供的电子设备中显示屏的拆分结构示意图；
图5为本申请一实施例提供的电子设备的背面结构示意图；
图6为本申请一实施例提供的电子设备中显示屏与后盖的局部剖面结构示意图；
图7为本申请一实施例提供的电子设备的内部结构示意图；
图8为本申请一实施例提供的电子设备中金属中板与顶边框和底边框的结构示意图；
图9为本申请一实施例提供的电子设备中天线的电气原理示意图；
图10为本申请一实施例提供的电子设备的顶端天线与显示屏的显示层的结构示意图；
图11为本申请一实施例提供的电子设备的底端天线与显示屏的显示层的结构示意图；
图12为本申请一实施例提供的电子设备的局部结构示意图；
图13为本申请一实施例提供的电子设备的又一局部结构示意图；
图14为本申请一实施例提供的电子设备的顶端天线与显示屏的显示层的又一结构示意图；
图15为本申请一实施例提供的电子设备的底端天线与显示屏的显示层的又一结构示意图；
图16为本申请一实施例提供的电子设备中天线的又一电气原理示意图；
图17为本申请一实施例提供的电子设备中第三天线为低频天线时的电气结构示意图；
图18为本申请一实施例提供的电子设备中第六天线为低频天线时在不同的调谐态下的效率示意图；
图19为本申请一实施例提供的电子设备中第六天线为低频天线时在不同的调谐下第四天线和第五天线的辐射效率示意图；
图20为本申请一实施例提供的电子设备中第四天线为中高频的MIMO天线时的辐射效率示意图；
图21为本申请一实施例提供的电子设备中第四天线、第五天线和第六天线的回损曲线的示意图；
图22为本申请一实施例提供的电子设备中第六天线在谐振时的电流分布示意图；
图23为本申请一实施例提供的电子设备中在低频谐振下边框、显示屏显示层和金属中板上的电流分布示意图；
图24为本申请一实施例提供的电子设备中第四天线以及第四天线匹配为GPS和WIFI天线时的初始辐射效率示意图；
图25为本申请一实施例提供的电子设备中第四天线在谐振时的电流分布示意图；
图26为本申请一实施例提供的电子设备中第五天线在谐振时的电流分布示意图；
图27为本申请一实施例提供的电子设备中第四天线、第五天线和第六天线匹配后的辐射效率以及第四天线和第五天线隔离度的示意图；
图28为本申请一实施例提供的电子设备的顶端天线与显示屏的显示层的再一结构示意图；
图29为本申请一实施例提供的电子设备中天线的又一电气原理示意图；
图30为图29中第七天线的辐射效率示意图。
附图标记说明：
100-手机；10-显示屏；11-显示层；111-第二卷曲部；111a-连接结构；12-玻璃层；121-第一卷曲部；13a-支撑架；13b-支撑架；20-中框；21-顶边框；211-第一辐射体；
211a-安装部；211b-馈点结构；211c-插接部；212-第二辐射体；213-第三辐射体；
2131-第一匹配电路；2132-第二匹配电路；2333-第三匹配电路；2134-第四匹配电路；
2135-第一调谐开关；213a-第一调谐电路；21a-第一延伸枝节；21b-第二延伸枝节；
214-第七辐射体；215-第八辐射体；216a-第二调谐电路；22-金属中板；23-底边框；
231-第四辐射体；232-第五辐射体；233-第六辐射体；23a-第四延伸枝节；
23b-第五延伸枝节；201-第一天线；202-第二天线；203-第三天线；204-第四天线；
205-第五天线；206-第六天线；2017-第七天线；208-第八天线；30-电路板；
31-第一电路板；32-第二电路板40-后盖；a1-第一馈电点；a2-第二馈电点；
a3-第三馈电点；a4-第四馈电点；a5-第五馈电点；a6-第六馈电点；a7-第七馈电点；
a7-第八馈电点；b1-第一馈源；b2第二馈源；b3-第三馈源；b4-第四馈源；
b5-第五馈源；b6-第六馈源；b7-第七馈源；b8-第八馈源；c1-第一接地点；
c2-第二接地点；c3-第三接地点；c4-第四接地点；c5-第五接地点；c6-第六接地点；
c7-第七接地点；c8-第八接地点；d1-第一调谐接触点；d2-第二调谐接触点；
a、b、c、d-断缝；a11-弹片。
具体实施方式
本申请实施例提供的一种电子设备，包括但不限于为手机、平板电脑、笔记本电脑、超级移动个人计算机(ultra-mobile personal computer，UMPC)、手持计算机、对讲机、上网本、POS机、个人数字助理(personal digital assistant，PDA)、可穿戴设备、虚拟现实设备、无线U盘、蓝牙音响/耳机、或车载前装等具有天线的移动或固定终端。
其中，本申请实施例中，以手机100为上述电子设备为例进行说明，本申请实施例提供的手机100可以为卷曲屏的手机，图2和图3分别示出了手机100的整体结构和拆分结构，参见图2和图3所示，手机100可以包括：显示屏10、后盖40、中框20和电路板30，其中，电路板30可以设置在中框20朝向后盖40的一面上，显示屏10和后盖40可以分别位于中框20的两侧。其中，由于手机100的顶部和底部处会设置元器件，所以本申请实施例中，电路板30可以包括第一电路板31和第二电路板32，第一电路板31和第二电路板32可以通过柔性电路板或者引线进行电连接，第一电路板31可以位于中框20的上部分，第二电路板32可以位于中框20的下部分，这样可以实现手机100顶端和底端开设的接口与电路板30的电连接。
其中，为了提高屏占比，本申请实施例中，如图3所示，显示屏10的左右两个侧边朝向后盖40卷曲，这样电子设备的左右侧边为屏幕的显示区域，这样消除了手机100左右方向上黑边，从而实现电子设备在左右两侧无边框“全视屏”。
其中，本申请实施例中，由于显示屏10的左右两侧边卷曲到手机100的背面，所以，如图3所示，中框20包括金属中板22、顶边框21和底边框23。顶边框21和底边框23可以分别位于金属中板22的顶端和底端。组装完成时，顶边框21和底边框23分别位于显示屏10和后盖40的顶端和底端(参见图2所示)，顶边框21和底边框23裸露在外，金属中板22位于显示屏10、后盖40、顶边框21和底边框23围成的空间中。这样手机100的显示面上具有顶边框21和底边框23两个边框，显示面的侧面不存在边框，手机100的屏占比可以到达95％。其中，本申请实施例中，金属中板22的材料包括不限于为铝合金、不锈钢、钢铝复合压铸板或钛合金。
其中，顶边框21和底边框23可以为金属边框，或者顶边框21和底边框23还可以为非金属边框，例如可以为陶瓷边框或者玻璃边框。其中，顶边框21和底边框23为金属边框时，金属边框的材料包括但不限于为铝合金、不锈钢、钢铝复合压铸板或钛合金。
其中，为了便于显示屏10的两侧边朝向后盖40卷曲，本申请实施例中，手机100还包括：位于金属中板22两侧的支撑架，例如，支撑架13a和支撑架13b，其中，支撑架13a和支撑架13b位于顶边框21和底边框23之间，支撑架13a可以与金属中板22的一侧边相连，支撑架13b可以与金属中板22的另一个侧边相连。显示屏10的两侧边卷曲时，支撑架13a和支撑架13b对显示屏10的两个卷曲部分提供支撑，显示屏10的两侧边可以在支撑架的支撑下朝向后盖40进行卷曲。
其中，支撑架13a和支撑架13b与金属中板22之间可以通过卡接、粘合、紧固件(例 如螺钉)相连。本申请实施例中，支撑架13a和支撑架13b可以为非金属支撑架，例如可以为塑料支撑架，这样可以减轻手机100的重量。
本申请实施例中，由于显示屏10需要进行卷曲，所以，显示屏10可以为柔性显示屏10，例如柔性显示屏10可以为有机发光二极管(Organic Light-Emitting Diode，OLED)显示屏。一般来说，如图4所示，显示屏10为OLED显示屏时，该显示屏10可以包括：显示层11和玻璃层12，玻璃层12覆盖在显示层11上，玻璃层12的尺寸可以大于等于显示层11的尺寸。由于需要卷曲，所以玻璃层12可以为可弯折的玻璃层。显示层11可以包括多层功能层，多层功能层例如可以为有机发光层、阳极层、阴极层、薄膜晶体管层(Thin Film Transistor，TFT)等膜层，所以显示层11中具有多层金属层。在其他示例中，显示屏10还可以包括：触控层(未示出)，其中触控层可以设置在显示层11与玻璃层12之间。或者，触控层可以集成在在显示层11内，形成集触控和显示功能为一体的触控显示板，玻璃层12盖设在触控显示板上。
其中，显示屏10的两侧边朝向后盖40卷曲后，显示屏10的两侧形成卷曲部。例如参见图4所示，玻璃层12的两侧边在卷曲过程中形成第一卷曲部121，显示层11的两侧边在卷曲过程中形成第二卷曲部111。其中，如图5所示，显示屏10的卷曲部分延伸到后盖40处，后盖40可以与显示屏10的玻璃层12进行连接。
其中，参见图6所示，显示屏10中玻璃层12的第一卷曲部121卷曲的角度可以为90°-180°，例如，图6中，显示屏10中玻璃层12的第一卷曲部121卷曲的角度可以为155°，玻璃层12的两侧边从显示面卷曲到后盖40，这样手机100的左右两个侧面均为玻璃层12。或者，在其他示例中，玻璃层12的第一卷曲部121还可以卷曲135°。第一卷曲部121的卷曲角度可以介于90°-180°之间的任意角度。
本申请实施例中，显示屏10中显示层11的第二卷曲部111的卷曲角度可以为90°-150°，例如，图6中，显示屏10中显示层11的第二卷曲部111的卷曲角度可以为135°，这样电子设备的左右两个侧面以及部分背面均有显示区域，避免了电子设备的左右两个黑边的存在而降低屏占比的问题。当然，本申请实施例中，显示屏10中显示层11的第二卷曲部111的卷曲角度可以150°-180°之间的任意值，例如，显示层11的第二卷曲部卷曲的角度可以为180°。
需要说明的是，上述描述中，第一卷曲部121和第二卷曲部111卷曲的角度范围可以包括端点值，例如，第一卷曲部121卷曲的角度为90°-180°时，包括端点值90°和端点值180°。
其中，本申请实施例下述的描述中，是以图6中，显示屏10中显示层11的第二卷曲部111卷曲135°，玻璃层12的第一卷曲部121卷曲180°为例进行说明。
在一种可能的实现方式中，本申请实施例中，顶边框21和底边框23可以为金属边框，例如顶边框21和底边框23的材料可以铝合金、不锈钢、钢铝复合压铸、钛合金。后盖40可以为玻璃后盖。
其中，当顶边框21和底边框23为金属边框时，顶边框21和底边框23可以作为天线的辐射体，但是由于电子设备的显示屏10卷曲，导致电子设备的左右两个侧面均为玻璃层12，这样电子设备的左右两个侧面无法作为天线。例如，对于宽度为75mm的手机100来说，现有技术中(参见图1天线分布)，可用作天线的金属边框的总长度可以为210mm (顶部：75+15+15＝105mm，底部：75+15+15＝105mm)，而当手机100的显示屏10卷曲后，由于侧面为玻璃层12，所以可用作天线的金属边框只有顶边框21和底边框23，可用作天线的金属边框长度为150mm，所以导致可用作天线的金属边框的长度缩减了约30％左右，这样没有足够的长度来布置所有的天线。若在手机100内靠近显示屏10卷曲部的位置安置天线支架或与顶边框21和底边框23分离的天线来增长天线长度时，由于显示屏10的显示层11中具有金属层，金属层在卷曲部处向上卷曲，这样显示层11中的金属层会遮挡住手机100侧边天线的辐射口径，从而造成安置在手机100侧边内的天线的辐射效率大幅降低。
基于上述描述，本申请实施例中，参见图7所示，顶边框21和底边框23上具有至少两个断缝，例如，顶边框21上具有断缝a和断缝b，其中，断缝a和断缝b将顶边框21分隔为第一辐射体211、第二辐射体212和位于第一辐射体211和第二辐射体212之间的第三辐射体213。底边框23上具有断缝c和断缝d，其中，断缝c和断缝d将底边框23分隔为第四辐射体231、第五辐射体232和位于第四辐射体231和第五辐射体232之间的第六辐射体233。
示例性的，如图7所示，第三辐射体213和第六辐射体233的长度L1可以为50-60mm，例如，第三辐射体213的长度可以为53mm，或者，第三辐射体213的长度可以为55mm。其中，第三辐射体213和第六辐射体233的长度可以相同，也可以不同。
其中，本申请实施例中，如图7所示，为了避免显示层11中的金属层以及金属中板22对辐射体的干扰，所以，第一辐射体211、第二辐射体212和第三辐射体213与金属中板22或显示层11之间的最小距离h1可以为1-1.4mm，例如，第一辐射体211、第二辐射体212和第三辐射体213与金属中板22或显示层11之间的最小距离h1可以为1.2mm，或者也可以为1.3mm。这样可以确保第一辐射体211、第二辐射体212和第三辐射体213的净空可以为1-1.4mm。
示例性的，如图7所示，第四辐射体231、第五辐射体232和第六辐射体233与金属中板22或显示层11之间的最小距离h2可以为1.2-1.4mm，例如，第四辐射体231、第五辐射体232和第六辐射体233与金属中板22或显示层11之间的最小距离h1可以为1.25mm，或者也可以为1.35mm。这样可以确保第四辐射体231、第五辐射体232和第六辐射体233的净空可以为1.2-1.4mm。
示例性的，如图8所示，第一辐射体211、第二辐射体212、第四辐射体231和第五辐射体232的长度L3可以为8-10mm，例如，第一辐射体211、第二辐射体212、第四辐射体231和第五辐射体232的长度L3可以为8.75mm，或者第一辐射体211、第二辐射体212、第四辐射体231和第五辐射体232的长度L3可以为9mm，其中，本申请实施例中，第一辐射体211、第二辐射体212、第四辐射体231和第五辐射体232的长度可以相同，也可以不同。
示例性的，如图8所示，断缝a、断缝b、断缝c和断缝d的缝宽L2可以为1-1.5mm。例如，断缝a、断缝b、断缝c和断缝d的缝宽L2可以为1.2mm，或者断缝a、断缝b、断缝c和断缝d的缝宽L2可以为1.4mm。
需要说明的是，当第四辐射体231、第五辐射体232和第六辐射体233为手机100主天线(Main Antenna)的辐射枝节时，第四辐射体231、第五辐射体232和第六辐射体233 的净空大于第一辐射体211、第二辐射体212和第三辐射体213的净空，这样确保了手机100主天线具有更大的辐射效率。
其中，本申请实施例中，手机组装时，各个断缝以及边框与金属中板之间的间隔区域内可以通过纳米注塑方式注入塑胶材料，使得各个边框与金属中板组成一个整体结构。
其中，本申请实施例中，为了延长天线的长度，所以，还包括至少一个延伸枝节，示例性的，如图8所示，分别设置四个延伸枝节，分别为：第一延伸枝节21a、第二延伸枝节21b、第四延伸枝节23a和第五延伸枝节23b，其中，第一延伸枝节21a的一端与第一辐射体211电连接，第一延伸枝节21a的另一端延伸到显示屏10和后盖40围成的空间内，这样第一天线201的第一延伸枝节21a内嵌在手机内部。第一辐射体211和第一延伸枝节21a组成第一天线201的辐射枝节。第二延伸枝节21b的一端与第二辐射体212电连接，第二延伸枝节21b的另一端延伸到显示屏10和后盖40围成的空间内，第二辐射体212和第二延伸枝节21b组成第二天线202的辐射枝节。第四延伸枝节23a的一端与第四辐射体231电连接，第四延伸枝节23a的另一端延伸到显示屏10和后盖40围成的空间内，第四辐射体231和第四延伸枝节23a组成第四天线204的辐射枝节。第五延伸枝节23b的一端与第五辐射体232电连接，第五延伸枝节23b的另一端延伸到显示屏10和后盖40围成的空间内，第五辐射体232和第五延伸枝节23b组成第五天线205的辐射枝节。
其中，本申请实施例中，第一延伸枝节21a、第二延伸枝节21b、第四延伸枝节23a和第五延伸枝节23b的材料可以与金属中板22、顶边框21和底边框22的材料相同或者也可以不同。例如，本申请实施例中，第一延伸枝节21a、第二延伸枝节21b、第四延伸枝节23a和第五延伸枝节23b的材料可以包括但不限于为铝合金、不锈钢、钢铝复合压铸板或钛合金。
本申请实施例中，通过增加第一延伸枝节21a、第二延伸枝节21b、第四延伸枝节23a和第五延伸枝节23b，这样一方面延伸了天线的长度，从而有效的补偿天线长度不足的问题；另一方面增加的第一延伸枝节21a、第二延伸枝节21b、第四延伸枝节23a和第五延伸枝节23b位于显示屏10和后盖40围成的空间内，与第一延伸枝节21a、第二延伸枝节21b、第四延伸枝节23a和第五延伸枝节23b电连接的第一辐射体211、第二辐射体212、第四辐射体231和第五辐射体232位于手机100的顶端和底端，这样可以通过第一辐射体211、第二辐射体212、第四辐射体231和第五辐射体232向外辐射，从而在延长天线的基础上确保了天线辐射效率。
本申请实施例中，第一延伸枝节21a、第二延伸枝节21b、第四延伸枝节23a和第五延伸枝节23b的另一端延伸到显示屏10和后盖40围成的空间内后，可以如图8所示，第一延伸枝节21a、第二延伸枝节21b、第四延伸枝节23a和第五延伸枝节23b的另一端与金属中板22相连实现接地(因为金属中板22与电路板30的接地点电连接)，或者也可以与电路板30的接地点相连实现接地。
本申请实施例中，第一延伸枝节21a、第二延伸枝节21b、第四延伸枝节23a和第五延伸枝节23b在显示屏10和后盖40围成的空间内设置时，第一延伸枝节21a、第二延伸枝节21b、第四延伸枝节23a和第五延伸枝节23b可以靠近显示层11的第二卷曲部111围成的空间设置，例如，第一延伸枝节21a、第二延伸枝节21b、第四延伸枝节23a和第五延伸枝节23b可以被显示层11的第二卷曲部111包裹。或者，第一延伸枝节21a、第二延伸枝 节21b、第四延伸枝节23a和第五延伸枝节23b可以沿着与第二卷曲部111的轴向方向平行的方向延伸设置。或者，第一延伸枝节21a、第二延伸枝节21b、第四延伸枝节23a和第五延伸枝节23b可以在显示屏10和后盖40围成的空间内倾斜设置。
本申请实施例中，第一延伸枝节21a、第二延伸枝节21b、第四延伸枝节23a和第五延伸枝节23b分别与第一辐射体211、第二辐射体212、第四辐射体231和第五辐射体232相连时，可以形成呈T型结构的辐射枝节。
本申请实施例中，手机100可以包括至少一个天线，例如可以包括一个或多个天线。示例性的，如图9所示，手机100可以包括6个天线，分别可以为：第一天线201、第二天线202、第三天线203、第四天线204、第五天线205和第六天线206，其中，第一天线201、第二天线202和第三天线203可以位于手机100的顶部，第四天线204、第五天线205和第六天线206可以位于手机100的底部。其中，第二天线202和第三天线203可以为分集天线(Div Antenna)，第一天线201可以为WIFI天线、蓝牙天线和GPS天线，即第一天线201可以为双频天线(WIFI天线和蓝牙天线使用一个频段，GPS使用另一个频段)。第五天线205和第六天线206可以为主天线(Main Antenna)，第四天线可以为中高频的多输入-多输出(Multiple-Input Multiple-Output，MIMO)天线。其中，第五天线205和第六天线206为主天线时，这样主天线位于手机的底部，使得手机100吸收辐射率(Specific Absorption Rate，SAR)较低。
示例性的，第一天线201可以包括：第一辐射体211、第一延伸枝节21a、第一馈源b1、第一馈电点a1和第一接地点c1，其中，第一馈电点a1和第一接地点c1均与第一延伸枝节21a电连接，第一馈源b1通过第一馈电点a1向第一延伸枝节21a上馈入高频电流，高频电流在第一延伸枝节21a和第一辐射体211上经转化以电磁波方式向外发射。本申请实施例中，第一延伸枝节21a和第一辐射体211为第一天线201的辐射枝节。
其中，第二天线202可以包括：第二辐射体212、第二延伸枝节21b、第二馈源b2、第二馈电点a2和第二接地点c2。第二馈电点a2和第二接地点c2均与所述第二延伸枝节21b电连接。第二馈源b2与第二馈电点a2电连接，第二延伸枝节21b和第二辐射体212为第二天线202的辐射枝节。
其中，第一延伸枝节21a和第二延伸枝节21b的设置延长了第一天线201和第二天线202的长度，从而可以满足更多天线的设置。
其中，第三天线203可以包括：第三辐射体213、第三馈源b3、第三馈电点a3和第三接地点c3。第三馈电点a3和第三接地点c3均与第三辐射体213相连，第三馈源b3与第三馈电点a3电连接。
本申请实施例中，手机100顶部设置的第一天线201、第二天线202和第三天线203分别具有第一馈电点a1、第二馈电点a2和第三馈电点a3，这样手机100顶部的天线具有三个独立的馈电口，第一天线201、第二天线202和第三天线203中的其中一个可以为低频天线，另一个可以为中高频天线，第三个天线可以为覆盖中高频的MIMO天线，例如，第一天线201和第三天线203可以为覆盖低中高频的分集天线(Div Antenna)，第二天线202可以为MIMO天线，或者，第二天线202和第三天线203可以为覆盖低中高频的分集天线，第一天线201可以为蓝牙天线(2400MHz)、WIFI天线(2400MHz)和GPS天线，其中，蓝牙天线、WIFI天线和GPS天线可以共用第一天线201，第一天线201位双频天 线。或者，第一天线201或第二天线202可以为覆盖5G频段的天线，例如5G频段的N77频段(3300-4200MHz)和N79频段(4400-5000MHz)，而现有技术中的一个或两个独立馈电口的天线相比，本申请实施例中，由于设置了三个独立的馈电口，所以可以多设计出了一个可以覆盖中高频段的天线，这样手机100顶部天线设计的自由度更高，可覆盖的频段越多。需要说明的是，本申请实施例中，手机100顶部设置的馈电口的数量包括但不限于三个。
其中，第四天线204可以包括：第四辐射体231、第四延伸枝节23a、第四馈源b4、第四馈电点a4和第四接地点c4。第四馈电点a4和第四接地点c4均与第四延伸枝节23a电连接。第四延伸枝节23a增长了第四天线204的长度。
其中，第五天线205可以包括：第五辐射体232、第五延伸枝节23b、第五馈源b5、第五馈电点a5和第五接地点c5。第五馈电点a5和第五接地点c5均与第五延伸枝节23b电连接。第五延伸枝节23b增长了第五天线205的长度。
其中，第六天线206可以包括：第六辐射体233、第六馈源b6、第六馈电点a6和第六接地点c6。第六馈电点a6和第六接地点c6均与第六辐射体233相连。
本申请实施例中，手机100底部设置的第四天线204、第五天线205和第六天线206分别具有第四馈电点a4、第五馈电点a5和第六馈电点a6，这样手机100底部天线具有三个独立的馈电口，手机100底部天线设计的自由度更高，第四天线204、第五天线205和第六天线206中的其中一个可以为低频天线，另一个可以为中高频天线，第三个可以多设计出一个可以覆盖中高频的天线，这样手机100底端三个天线可覆盖的频段越多。本申请实施例中，第五天线205和第六天线206可以为主天线，第四天线可以为MIMO天线或5G频段(例如N77频段(3300-4200MHz)和N79频段(4400-5000MHz))天线。
其中，图9中的各个馈源和各个馈电点可以位于电路板30上，各个接地点可以与金属中板22或电路板30的接地点电连接实现接地。
其中，本申请实施例中，第三天线203的第三接地点c3设置时，可以如图9所示，第三接地点c3与第二辐射体212相比更靠近第一辐射体211，例如，第三接地点c3与断缝b之间的水平距离L4可以为2.6mm，第三接地点c3与断缝a之间的水平距离可以为53mm，或者，第三天线203的第三接地点c3可以靠近第二辐射体212，通过将第三天线203的第三接地点c3靠近第一辐射体211或第二辐射体212，这样第三天线203在不同谐振下对靠近的辐射体的干扰减小，从而确保与第三接地点c3靠近的辐射体的性能稳定。
同理，第六天线206的第六接地点c6可以如图9所示，第六接地点c6与第五辐射体232的距离相比，第六接地点c6更靠近第四辐射体231，例如，第六接地点c6与断缝d之间的水平距离可以为2.6mm，第六接地点c6与断缝c之间的水平距离可以为53mm。或者，第六天线206的第六接地点c6可以靠近第五辐射体232，通过将第六天线206的第六接地点c6靠近第四辐射体231或第五辐射体232，这样与第六接地点c6靠近的辐射体的性能不易受到第六天线206的影响。
其中，本申请实施例中，由于第三辐射体213的长度较长，所述，第三天线203可以为低频天线，工作频段可以为(700-960MHz)，第一天线201和第二天线202可以为中高频天线，工作频段可以为1805-2690MHz，这样第三天线203和第二天线202可以为覆盖低中高频段的MIMO天线，第一天线201可以为覆盖WIFI天线(频段：2400-2500MHz) 和GPS天线(工作频段：1575±100MHz)的双频天线。或者第一天线201可以为中高频的MIMO天线。
其中，由于第六辐射体233的长度较长，所以第六天线206可以为低频天线，第四天线204和第五天线205可以为中高频天线，例如，第六天线206和第五天线205可以为覆盖低中高频段的主天线(例如，低频为700-960MHz，中频为1710-2200MHz，高频为2300-2700MHz)，第四天线204可以为中高频的MIMO天线。或者第四天线204也可以为覆盖WIFI天线和GPS天线的双频天线。需要说明的是，本申请实施例中，第一天线201、第二天线202、第三天线203以及第四天线204、第五天线205和第六天线206的种类包括但不限于为上述天线。
在一种可能的实现方式中，如图10所示，第一延伸枝节21a的长度H1可以为10-25mm，例如，第一延伸枝节21a的长度H1可以为23mm，或者，第一延伸枝节21a的长度H1可以为11mm。第二延伸枝节21b的长度H2可以为10-25mm，例如，第二延伸枝节21b的长度H2可以为18mm，或者，第一延伸枝节21a的长度H1可以为22mm。这样手机100顶部的天线长度至少增加了20-50mm，从而有效的补偿了天线长度不足的问题。
其中，本申请实施例中，由于第一延伸枝节21a和第二延伸枝节21b分别为第一天线201和第二天线202的辐射枝节，所述第一延伸枝节21a和第二延伸枝节21b在手机100内部设置时，第一延伸枝节21a和第二延伸枝节21b的净空不小于0.5mm，例如第二延伸枝节21b与显示层11的内壁(例如图6中显示层11和第二卷曲部111朝向手机内部的一面)之间的最小距离h3可以为0.5mm。
本申请实施例中，如图11所示，第四延伸枝节23a的长度H4可以为10-25mm，例如，第四延伸枝节23a的长度H4可以为23mm，或者，第四延伸枝节23a的长度H4可以为11mm。第五延伸枝节23b的长度H3可以为10-25mm，例如，第五延伸枝节23b的长度H3可以为18mm，或者，第五延伸枝节23b的长度H3可以为22mm。这样手机100底部的天线长度至少增加了20-50mm，从而有效的补偿了手机100底部天线长度不足的问题。
其中，第四延伸枝节23a和第五延伸枝节23b的净空不小于0.5mm，例如，第四延伸枝节23a与显示层11的内壁之间的最小距离可以为0.5mm，这样确保第四延伸枝节23a和第五延伸枝节23b在手机100内部具有净空区域，实现第四延伸枝节23a和第五延伸枝节23b具有良好的辐射效率。
在一种可能的实现方式中，各个延伸枝节与对应的辐射体之间可以通过焊接、卡接、紧固件(例如螺钉)或一体成型方式进行连接。本申请实施例中，如图12所示，第一辐射体211上具有安装部211a，如图13所示，第一延伸枝节21a与第一辐射体211相连的一端具有可插设在安装部211a上的插接部211c，插接部211c和安装部211a之间通过紧固件(例如螺钉或螺栓)连接，这样第一延伸枝节21a与第一辐射体211实现固定。本申请实施例中，其余三个延伸枝节与对应的辐射体之间也可以采用图13所示的连接方式。当然，四个延伸枝节与对应的辐射体之间可以但不限于采用上述安装部211a和插接部211c的连接方式，还可以采用其他配合结构实现连接。
在一种可能的实现方式中，第一延伸枝节21a、第二延伸枝节21b、第三天线203延伸枝节和第四延伸枝节23a在手机100内呈悬空的桥式结构，例如，如图13所示，第一延伸枝节21a的一端与第一辐射体211相连，另一端与金属中板22相连，第一延伸枝节21a 在第一辐射体211和金属中板22之间呈悬空的桥式结构。其中，本实施例中，各个延伸枝节可以为金属中板22的部分边缘朝向对应的辐射体延伸而形成的悬空桥式结构，例如，如图13所示，金属中板22的一侧边缘悬空延伸到第一辐射体211处并与第一辐射体211相连。或者，金属中板22靠近第一辐射体211的区域挖出一个悬空的桥式结构作为第一延伸枝节21a，这样第一延伸枝节21a的一端与金属中板22为一体的，第一接地点c1位于金属中板22，从而避免了第一延伸枝节21a与金属中板22之间通过设置弹片来接地。
其中，本申请实施例中，各个馈电点与辐射体或延伸枝节电连接时，可以通过设置在辐射体或延伸枝节上设有馈点结构，例如，如图12所示，第一延伸枝节21a上设有馈点结构211b，第一馈电点a1上电连接有弹片a11，如图13所示，电路板30安装后，弹片a11与馈点结构211b抵接实现电连接。本申请实施例中，其余馈电点上也可以连接弹片，辐射体或延伸枝节设有与弹片抵接的馈点结构，各个馈电点通过弹片和馈点结构抵接与延伸枝节或辐射体电连接。
其中，本申请实施例中，如图13所示，显示层11上设有连接结构111a，电路板30与显示层11之间可以通过紧固件(例如螺钉)与连接结构111a相连实现连接，例如，显示层11的连接结构111a通过紧固件与电路板30的接地点连接，这样显示层11实现接地。
在一种可能的实现方式中，为了低频天线(例如第三天线203和第六天线206)可以覆盖更多的带宽，本申请实施例中，如图14所示，第三天线203还可以包括：第一调谐接触点d1，第一调谐接触点d1用于为第三辐射体213连接匹配电路。如图15所示，第六天线206还可以包括：第二调谐接触点d2，第二调谐接触点d2用于为第三辐射体213连接匹配电路。本申请实施例中，第一调谐接触点d1和第二调谐接触点d2可以为连接在第三辐射体213和第六辐射体233上的导电片。
其中，本申请实施例中，第一调谐接触点d1和第二调谐接触点d2与第三辐射体213和第六辐射体233的连接位置具体根据调谐的宽度设置。其中，第一调谐接触点d1与第三辐射体213连接的位置与第三馈电点a3与第三辐射体213连接的位置之间的距离越大，调谐的范围更大，但是这样会影响到辐射效率，所以当调谐时可以覆盖所需的频带时，可以将第一调谐接触点d1与第三辐射体213连接的位置靠近第三馈电点a3与第三辐射体213连接的位置，这样可以得到高的辐射效率。例如，当第六天线206为主天线的低频天线，第三天线203为MIMO天线时，由于主天线需要大的调谐范围，MIMO天线的调谐范围小于主天线的调谐范围，所以第六辐射体233与第二调谐接触点d2和第六馈电点a6的连接点之间的距离大于第三辐射体213与第一调谐接触点d1和第三馈电点a3的连接点之间的距离。
示例性的，如图16所示，第三辐射体213通过第一调谐接触点d1电连接第一调谐电路213a。第六辐射体233通过第二调谐接触点d2电连接第二调谐电路216a，通过第一调谐电路213a，第三天线203可以切换到不同低频频段对应的路径上，这样第三天线203的带宽可以覆盖700-960MHz的全部带宽。通过第二调谐电路216a，第六天线206可以切换到不同低频频段对应的路径上，这样确保第六天线206的带宽可以覆盖700-960MHz的全部带宽。
在一种可能的实现方式中，第一调谐电路213a和第二调谐电路216a可以包括调谐开关和至少一个匹配电路，匹配电路的一端与调谐开关相连，匹配电路的另一端接地。其中， 调谐开关和匹配电路的具体结构不做限定。例如，调谐开关可以为一个开关或多个开关。其中，任意一个开关可以为一输入多输出的单刀多掷开关，也可以为多输入多输出的多刀多掷开关，本申请对此不做限定。任意一个开关可以为采用串联和/或并联的一个或者多个开关连接，本申请对此不做限定。匹配电路可以为采用一个电容，或者一个电感，或者多个串联连接的电容，或者多个串联连接的电感，或者并联连接的多个电容，或者并联连接的多个电感，或者串联连接的至少一个电容和至少一个电感，或者并联连接的至少一组串联连接的电容和电感，本申请对此不做限定。
示例性的，如图17所示，第一调谐电路213a包括第一调谐开关2135和四个匹配电路，分别为第一匹配电路2131、第二匹配电路2132、第三匹配电路2133和第四匹配电路2134，其中，第一调谐开关2135可以为单刀四掷开关(例如SP4T)，第一调谐开关2135具有四个切换的路径，例如，RF1，RF2，RF3和RF4，第一匹配电路2131、第二匹配电路2132、第三匹配电路2133和第四匹配电路2134分别与RF1，RF2，RF3和RF4对应。例如，当手机100需要支持B8(GSM 900MHz)、B5(GSM 850MHz)、B20(GSM 800MHz)、B28(GSM 700MHz)时，B8、B5、B20、B28所对应的开关状态以及第一匹配电路2131、第二匹配电路2132、第三匹配电路2133和第四匹配电路2134的关系如表1所示：
表1
波段 开关态 电感或电容
B28a RF1 第一匹配电路2131：0.3pF
B28b All OFF 开路
B20 RF2 第二匹配电路2132：47nH
B5 RF3 第三匹配电路2133：30nH
B8 RF4 第四匹配电路2134：18nH
表1中，可以出，当手机100需要支持B8(GSM 900MHz)时，第一调谐开关2135切换到RF4。在RF4的路径上连接的第四匹配电路2134为18nH的电感。其中，连接的电感越大，谐振频率越低。表1中，B28a为第一调谐开关2135切换到RF1，且连接0.3pF的电容时覆盖的频段，B28a为第一调谐开关2135的所有路径断开后，第六天线206覆盖的频段。本申请实施例中，通过上述四个匹配电路实现第六天线206的带宽覆盖低频频段(700-960MHz)的全部带宽。
基于上述描述，本申请实施例中，以下述场景一和场景二中的天线为例进行仿真测试。
场景一
本申请实施例中，显示屏10的玻璃层12卷曲180°，显示层11卷曲135°，屏占比高达95％。手机100底部天线：第四天线204、第五天线205和第六天线206的净空≤1.35mm。其中，手机100的底边框23总长度为73.5mm，断缝c和断缝d的宽度为1.5mm，第六辐射体233的长度为53mm，第四辐射体231和第五辐射体232的长度为8.75mm，第四延伸枝节23a和第五延伸枝节23b的长度为14.25mm，所以第五天线205和第四天线204的天线辐射长度为23mm。第六天线206的第六接地点c6靠近第四辐射体231设置。
本申请实施例中，第六天线206设置为低频天线，第六天线206连接调谐电路，具有频率调谐功能，每个调谐状态需覆盖大约80MHz的带宽。其中，使用上述表1中的参数进行调谐时，第六天线206在不同的调谐态下的效率如图18所示，图18示出了第六天线 206在不同调谐状态下的天线仿真效率，图18可以看出，第六天线206在B28a、B28b、B20、B5、B8中，平均效率平均高于-5.5dB，而现有低频天线的平均效率为-7dB，所以，本申请实施例中，第六天线206在不同调谐下的平均效率比现有低频天线的平均效率高于1.5dB。
示例性的，第四天线204设置为高频天线，第五天线205设置为中高频天线，图19示出了第六天线206在不同调谐态下，第四天线204和第五天线205的辐射效率，图19可以看出，第六天线206在不同调谐状态下，第四天线204的辐射效率可以覆盖2300-2690MHz，在2300-2690MHz频段内，第四天线204的平均效率为-4.5dB。
图19还可以得到，在第六天线206的各个调谐状态下，第四天线204的性能比较稳定，这是由于第六天线206的第六接地点c6靠近第四天线204，这样第六天线206在调谐时对第四天线204的性能不会造成影响，从而确保了第四天线204在第六天线206的不同调谐下性能比较稳定。
图19中，第六天线206在不同调谐状态下，第五天线205的辐射效率可以覆盖1710-2690MHz。第六天线206在B28(703-803MHz)调谐状态下，第五天线205的效率在B12(2600MHz)附近有下降，这是因为第六天线206的接地点远离第五天线205，第六天线206调谐时，会影响第五天线205的稳定性。但是第五天线205在1710-2690MHz频段内，计入开关及器件损耗后，第五天线205在B3(1800MHz)、B1(2100MHz)、B7(2600MHz)的平均效率仍高于-5.5dB。所以，本申请实施例中，当第四天线204为高频天线，第五天线205为中高频天线时，第四天线204和第五天线205在较小净空和显示层11卷曲部的遮挡下，还具有良好的带宽和辐射效率。
示例性的，第四天线204设置为中高频天线，例如，第四天线204设置为中高频的MIMO天线。图20示出了第四天线204设置为中高频MIMO天线时的辐射效率，图20中可以看出，第四天线204的辐射效率可以覆盖1805-2690MHz的频段。其中，当第四天线204设置为中高频MIMO天线时，第四天线204的带宽进行扩展，所以第四天线204的平均辐射效率与图19中的中高频天线的平均辐射效率相比有所降低。图20中可以看出，在第六天线206不同调谐状态下，第四天线204在B3(1800MHz)的接收(Rx)频带内效率平均高于-7.5dB，B1(2100MHz)的Rx带内的效率平均-7.3dB，B7(2600MHz)的Rx带内的效率平均-6.5dB。所以，第四天线204设置为中高频的MIMO天线时，比图19中第四天线204设置为高频天线以及图19中的中高频天线的辐射效率下降了约2dB，但是对于MIMO天线来说，辐射效率下降2dB不会对天线的正常工作产生影响。所以，本申请实施例中，第五天线205设置为中高频天线的辐射效率大于第四天线204设置为中高频天线的辐射效率，因此第五天线205可以为主天线，覆盖主天线的中高频段，第四天线204可以为中高频的MIMO天线，因为MIMO天线辐射效率可以比主天线的辐射效率低3dB。
图21示出了第四天线204和第五天线205设置为中高频天线以及第六天线206设置为低频天线的初始谐振，如图21中，S3,3为第六天线206的回损曲线，S1,1为第四天线204的回损曲线，S2,2为第五天线205的回损曲线。如图21中可以看出，第六天线206为低频天线时，谐振在0.84GHz，第四天线204为中高频天线时，谐振在2.15GHz。第五天线205为中高频天线时，有两个谐振，分别在2.03GHz和2.93GHz。
一般来说，低频天线需要70mm左右的长度，才能产生0.84GHz的低频谐振，但是本申请实施例中，第六天线206的第六辐射体233的长度为53mm，却激励起0.84GHz的谐振，所以可以得到第六天线206除了第六辐射体233外，还借助了其他辐射体。图22示出了第六天线206在低频谐振(0.84GHz)时的电流分布，图22可以看出，第五辐射体232、第五延伸枝节23b和第六辐射体233形成了同向的电流(1/4波长)，所以，第五辐射体232与第六辐射体233之间1.5mm的断缝c并没有阻挡同相电流的分布，这样第六天线206辐射时，第六天线206借助第五天线205的辐射单元。第六辐射体233、第五辐射体232以及第五延伸枝节23b结合起来使得第六天线206在53mm的长度下激励起0.84GHz的谐振。因此，本申请实施例中，与现有技术相比，缩短了低频天线的长度。
图23示出了第六天线206在低频谐振(0.84GHz)下，中框20、显示屏10中显示层11的左边卷曲部、边框(例如顶边框21、底边框23以及各个延伸枝节)上的电流分布，图23可以看出，显示层11的卷曲侧边和边框的电流分布也是同相的，形成环型电流分布，对于低频天线，主要的辐射为地板辐射(即低频天线接地的金属板)，所以这种电流分布有利于低频天线的辐射。
图24示出了第四天线204设置为中高频天线时的初始辐射效率以及第四天线204设置为WIFI天线和GPS天线时的效率，如图24所示，第四天线204的谐振虽然在2.15GHz，但是在1.54GHz，第四天线204的初始辐射效率达到-2.3dB，所以，第四天线204具有很好的带宽特性，在1.5-2.7GHz频段内，效率高于-2.5dB，所以，用不同的匹配电路，第四天线204可以设置为中高频天线，也可以设置GPS天线和WIFI天线，第四天线204并非为通常的倒F型天线(Invert F Antenna，IFA)，因为23mm的天线长度，在GPS频段内(1557-1601MGHz)，不会有高于-2.0dB的初始辐射效率。
图25示出了第四天线204在谐振时的电流分布，如图25所示，第四天线204在手机100底边框23上形成了半波长的电流分布，这说明第四天线204的辐射来自第六辐射体233和第四天线204的辐射单元，其中，主要的辐射来自第六辐射体233，所以本申请实施例中，第四天线204借助第六天线206的辐射单元，所以即使第四天线204中的第四延伸枝节23a被显示层11的卷曲部遮挡，第四天线204的辐射效率较高，第四延伸枝节23a和第四辐射体231并不是第四天线204的主要辐射单元，第四延伸枝节23a和第四辐射体231上的电流跨过缝隙d，借用了第六天线206的辐射单元进行辐射。所以，本申请实施例中，确保了第四天线204具有良好的带宽和辐射效率。
如图26示出了第五天线205在谐振时的电流分布，如图25所示，第五天线205在第六辐射体233上形成3/4λ的电流模式，说明第五天线205借用第六辐射体233，第五天线205中与第五馈电点a5连接的第五延伸枝节23b和第五辐射体232并不是第五天线205的主要辐射单元，第五天线205的主要辐射单元为第六辐射体233，第五天线205复用了第六天线206的枝节来辐射。
所以，本申请实施例中，第四天线204和第五天线205借用第六天线206的辐射枝节，从而克服了显示屏10卷曲时卷曲部遮挡天线而造成天线效率下降的问题。第六天线206借用第五天线205的辐射枝节，使得第六天线206的长度降低。
图27示出了第四天线204和第五天线205被设置成两个中高频的天线、第六天线206设置为低频天线时的效率以及隔离度曲线，图27中，S3,3为第六天线206加匹配电路后 的回损曲线，S2,2为第五天线205加匹配电路后的回损曲线，S1,1为第四天线204加匹配电路后的回损曲线，S1,2为第五天线205和第四天线204的隔离度曲线。如图27所示，第四天线204和第五天线205均为中高频天线时，第四天线204和第五天线205最差的隔离度在点1.837GHz，隔离度为-14.6dB，其他频段下，第四天线204和第五天线205的隔离度小于-14.6dB，而现有技术中，通常两个中高频不采用解耦的结构时，隔离度只有-6dB，所以，本申请实施例中，第四天线204和第五天线205为同频的中高频天线时，两个天线之间具有良好的隔离度。
场景二
在一种可能的实现方式中，本申请实施例中，手机100内还可以包括：至少一个高频天线。示例性的，如图28和图29所示，高频天线的数量为两个，分别为第七天线207和第八天线208，例如手机100还可以包括：第七天线207和第八天线208，其中，第七天线207可以包括：第七辐射体214、第七馈电点a7、第七馈源b7和第七接地点c7，其中，第七辐射体214与第七馈电点a7和第七接地点c7电连接，第七馈源b7通过第七馈电点a7向第七辐射体214馈入高频电流。其中，如图28所示，第七辐射体214可以沿着第一延伸枝节21a的内侧(即第一延伸枝节21a面向第二延伸枝节21b的一面)设置。其中，第七辐射体214与第一延伸枝节21a之间的最小距离大于等于0.5mm，这样确保第七辐射体214的净空大于等于0.5mm。
示例性的，第八天线208可以包括：第八辐射体215、第八馈电点a8、第八馈源b8和第八接地点c8，其中，第八辐射体215与第八馈电点a8和第八接地点c8电连接，第八馈源b8通过第八馈电点a8向第八辐射体215馈入高频电流。其中，如图28所示，第八辐射体215可以沿着第二延伸枝节21b的内侧(即第二延伸枝节21b朝向第一延伸枝节21a的一面)设置。第八辐射体215与第二延伸枝节21b之间的最小距离大于等于0.5mm，这样确保第八辐射体215的净空大于等于0.5mm。
其中，本申请实施例中，第七天线207和第八天线208具有对应的馈电点，这样手机100顶部天线具有至少5个独立馈电口，使得天线模式更丰富，天线设置的自由度更高。
其中，本申请实施例中，第七天线207和第八天线208可以为WIFI 5G天线，其中，WIFI 5G天线的工作频段可以为(4900-5900MHz)，或者第七天线207和第八天线208可以为覆盖5G频段的天线，例如，第七天线207和第八天线208的工作频段可以为(3300-3600MHz)和(4800-5000MHz)，需要说明的是，第七天线207和第八天线208工作频段包括但不限于为5G频段的6GHz以上或以下的频段。
图30示出了第七天线207为WIFI 5G天线时的辐射效率，如图30所示，在整个频段内平均效率高于-5dB。所以，第七天线207位于手机100内部时，第七天线207具有良好的辐射效率。
本申请实施例中，第七天线207和第八天线208的工作频段较高，所以这两个天线没有扰动已有的三个天线。这样第七天线207和第八天线208比较适合5G系统的天线(3.3-5GHz)。
需要说明的是，本实施例中，第七天线207和第八天线208设置的位置包括但不限于为沿着第一延伸枝节21a和第二延伸枝节21b的内侧，例如，还可以沿着第四延伸枝节23a 和第五延伸枝节23b，或者，可以分别沿着第一延伸枝节21a、第二延伸枝节21b、第四延伸枝节23a和第五延伸枝节23b的内侧设置第七天线207、第八天线208、第九天线(未示出)和第十天线(未示出)。第九天线和第十天线分别具有对应的馈电点，这样手机100顶部的天线具有5个独立的馈电口，手机100底部的天线具有5个独立的馈电口，手机100中可以设置10个天线。需要说明的是，本实施例中，手机100内天线的馈电口数量包括但不限于为10个。
其中，本申请实施例中，第七天线207和第八天线208的第七馈电点a7和第八馈电点a8可以位于电路板30上，第七接地点c7和第八接地点c8可以与电路板30的接地点相连，或者与金属中板22相连实现接地。第七天线207和第八天线208可以悬空设在手机100内部，或者第七天线207和第八天线208可以位于电路板30上，或者第七天线207和第八天线208可以悬空设在金属中板22上。
在本申请实施例的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应作广义理解，例如，可以是固定连接，也可以是通过中间媒介间接相连，可以是两个元件内部的连通或者两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请实施例中的具体含义。
在本申请实施例或者暗示所指的装置或者元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。在本申请实施例的描述中，“多个”的含义是两个或两个以上，除非是另有精确具体地规定。
本申请实施例的说明书和权利要求书及上述附图中的术语“第一”、“第二”、“第三”、“第四”等(如果存在)是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本申请实施例的实施例例如能够以除了在这里图示或描述的那些以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。
最后应说明的是：以上各实施例仅用以说明本申请实施例的技术方案，而非对其限制；尽管参照前述各实施例对本申请实施例进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请实施例各实施例技术方案的范围。

Claims (27)

  1. 一种天线组件，应用于电子设备，其特征在于，所述天线组件包括：第一天线，所述第一天线包括：第一辐射体、第一延伸枝节以及与所述第一延伸枝节电连接的第一馈电点和第一接地点；
    所述第一延伸枝节的一端与所述第一辐射体相连，所述第一延伸枝节的另一端延伸到所述电子设备的内部，所述第一辐射体位于所述电子设备的金属顶边框或金属底边框。
  2. 根据权利要求1所述的天线组件，其特征在于，还包括：第二天线，所述第二天线至少包括第二辐射体、第二延伸枝节以及与所述第二延伸枝节电连接的第二馈电点和第二接地点，所述第二延伸枝节的一端与所述第二辐射体相连，所述第二延伸枝节的另一端延伸到所述电子设备的内部；
    所述第一辐射体位于所述金属顶边框的一端，所述第二辐射体位于所述金属顶边框的另一端，或者，
    所述第一辐射体位于所述金属底边框的一端，所述第二辐射体位于所述金属底边框的另一端。
  3. 根据权利要求2所述的天线组件，其特征在于，还包括：第三天线，所述第三天线至少包括：第三辐射体以及与所述第三辐射体电连接的第三馈电点和第三接地点；
    所述第三辐射体位于所述第一辐射体和所述第二辐射体之间，所述第三辐射体的两端分别与所述第一辐射体和所述第二辐射体之间具有断缝。
  4. 根据权利要求3所述的天线组件，其特征在于，还包括：第四天线，所述第四天线至少包括：第四辐射体、第四延伸枝节以及与所述第四延伸枝节电连接的第四馈电点和第四接地点；
    所述第四延伸枝节的一端与所述第四辐射体相连，所述第四延伸枝节的另一端延伸到所述电子设备的内部，所述第四辐射体和所述第一辐射体中的其中一个位于所述金属顶边框，另一个位于所述金属底边框。
  5. 根据权利要求4所述的天线组件，其特征在于，还包括：第五天线，所述第五天线至少包括第五辐射体、第五延伸枝节以及与所述第五延伸枝节电连接的第五馈电点和第五接地点，所述第五延伸枝节的一端与所述第五辐射体相连，所述第五延伸枝节的另一端延伸到所述电子设备的内部；
    所述第四辐射体位于所述金属顶边框的一端，所述第五辐射体位于所述金属顶边框的另一端，或者，
    所述第四辐射体位于所述金属底边框的一端，所述第五辐射体位于所述金属底边框的另一端。
  6. 根据权利要求5所述的天线组件，其特征在于，还包括：第六天线，所述第六天线至少包括：第六辐射体以及与所述第六辐射体电连接的第六馈电点和第六接地点；
    所述第六辐射体位于所述第四辐射体和所述第五辐射体之间，所述第六辐射体的两端分别与所述第四辐射体和所述第五辐射体之间具有断缝。
  7. 根据权利要求6所述的天线组件，其特征在于，所述第三天线还包括：第一调谐电路，所述第一调谐电路的一端通过第一调谐接触点与所述第三辐射体电连接，所述第一调谐电路的另一端接地；
    所述第六天线还包括：第二调谐电路，所述第二调谐电路的一端通过第二调谐接触点与所述第六辐射体电连接，所述第二调谐电路的另一端接地。
  8. 根据权利要求7所述的天线组件，其特征在于，所述第一调谐电路和所述第二调谐电路板均包括调谐开关和至少一个匹配电路，所述匹配电路的一端与所述调谐开关电连接，所述匹配电路的另一端接地。
  9. 根据权利要求6-8任一所述的天线组件，其特征在于，所述第一辐射体、所述第二辐射体和所述第三辐射体为所述金属顶边框通过断开两个断缝而形成的三个金属边框；
    所述第四辐射体、第五辐射体和第六辐射体为所述金属底边框通过断开两个断缝而形成的三个金属边框。
  10. 根据权利要求6-9任一所述的天线组件，其特征在于，所述第一延伸枝节、所述第二延伸枝节、所述第四延伸枝节和所述第五延伸枝节在所述电子设备内呈悬空的桥式结构。
  11. 根据权利要求6-10任一所述的天线组件，其特征在于，所述第一延伸枝节、所述第二延伸枝节、所述第四延伸枝节和所述第五延伸枝节为所述电子设备内的金属中板分别朝向所述金属顶边框和所述金属底边框延伸形成的四个金属枝节。
  12. 根据权利要求6-11任一所述的天线组件，其特征在于，所述第一延伸枝节、所述第二延伸枝节、所述第四延伸枝节和所述第五延伸枝节的长度为10-25mm。
  13. 根据权利要求6-12任一所述的天线组件，其特征在于，所述第一辐射体、所述第二辐射体、所述第四辐射体和所述第五辐射体的长度为8-10mm。
  14. 根据权利要求6-13任一所述的天线组件，其特征在于，所述第三辐射体和所述第六辐射体的长度为50-60mm。
  15. 根据权利要求6-14任一所述的天线组件，其特征在于，所述第一辐射体、所述第二辐射体和所述第三辐射体的净空为1-1.4mm；
    所述第四辐射体、所述第五辐射体和所述第六辐射体的净空为1.2-1.4mm；
    所述第一延伸枝节、所述第二延伸枝节、所述第四延伸枝节和所述第五延伸枝节的净空不小于0.5mm。
  16. 根据权利要求6-15任一所述的天线组件，其特征在于，所述第三辐射体的两端与所述第一辐射体和所述第二辐射体之间的断缝的缝宽为1-1.5mm；
    所述第六辐射体的两端与所述第四辐射体和所述第五辐射体之间的断缝的缝宽为1-1.5mm。
  17. 根据权利要求6-16任一所述的天线组件，其特征在于，还包括：至少一个位于所述电子设备内的高频天线，每个所述高频天线包括高频辐射体以及与所述高频辐射体电连接的馈电点和接地点。
  18. 根据权利要求17所述的天线组件，其特征在于，所述高频天线位于所述第一天线辐射枝节、所述第二天线辐射枝节、所述第四天线辐射枝节或所述第五天线辐射枝节的内侧；
    所述高频天线的净空大于等于0.5mm。
  19. 根据权利要求6-18任一所述的天线组件，其特征在于，所述第三天线为低频天线，所述第一天线和所述第二天线为中高频天线，所述第一天线和所述第二天线借用所述第三 天线的辐射体，所述第三天线借用所述第一天线或所述第二天线的辐射枝节；
    所述第六天线为低频天线，所述第四天线和所述第五天线为中高频天线，所述第五天线和所述第四天线借用所述第六天线的辐射体，所述第六天线借用所述第四天线或第五天线的辐射枝节。
  20. 一种具有卷曲屏的电子设备，其特征在于，至少包括：卷曲屏、后盖、位于所述卷曲屏和所述后盖之间的中框以及上述权利要求1-19任一所述的天线组件，所述中框的顶边框和底边框中的至少一个为金属边框。
  21. 根据权利要求20所述的电子设备，其特征在于，所述中框包括金属中板和位于金属中板两端的金属顶边框和金属底边框，所述金属中板位于所述卷曲屏和所述后盖围成的空间内，所述金属顶边框和所述金属底边框分别位于所述卷曲屏和所述后盖的顶端和底端。
  22. 根据权利要求21所述的电子设备，其特征在于，所述金属顶边框和所述金属底边框上具有至少两个断缝，所述至少两个断缝将所述金属顶边框分隔形成所述天线组件的第一辐射体、第二辐射体以及位于所述第一辐射体和所述第二辐射体之间的第三辐射体；
    所述至少两个断缝至少将所述金属底边框分割形成所述天线组件的第四辐射体、第五辐射体以及位于所述第四辐射体和所述第五辐射体之间的第六辐射体。
  23. 根据权利要求21-22任一所述的电子设备，其特征在于，所述卷曲屏的两侧具有朝向所述后盖卷曲形成的卷曲部，所述天线组件中的第一延伸枝节、第二延伸枝节、第四延伸枝节和第五延伸枝节延伸到所述卷曲屏与所述后盖围成的空间内。
  24. 根据权利要求23所述的电子设备，其特征在于，所述金属中板的两侧边缘分别朝向所述金属顶边框和所述金属底边框延伸形成所述第一延伸枝节、所述第二延伸枝节、所述第四延伸枝节和所述第五延伸枝节。
  25. 根据权利要求20-24任一所述的电子设备，其特征在于，所述卷曲屏包括玻璃层和显示层，所述玻璃层的两侧具有朝向所述后盖卷曲的第一卷曲部，所述显示层的两侧具有朝向所述后盖卷曲的第二卷曲部。
  26. 根据权利要求25所述的电子设备，其特征在于，所述第一卷曲部的卷曲角度为90-180°；
    所述第二卷曲部的卷曲角度为90-150°。
  27. 根据权利要求20-26任一所述的电子设备，其特征在于，所述后盖为玻璃后盖。
PCT/CN2020/108603 2019-08-22 2020-08-12 一种天线组件和具有卷曲屏的电子设备 WO2021031944A1 (zh)

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