WO2020134870A1 - Ensemble antenne et terminal mobile - Google Patents

Ensemble antenne et terminal mobile Download PDF

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Publication number
WO2020134870A1
WO2020134870A1 PCT/CN2019/122251 CN2019122251W WO2020134870A1 WO 2020134870 A1 WO2020134870 A1 WO 2020134870A1 CN 2019122251 W CN2019122251 W CN 2019122251W WO 2020134870 A1 WO2020134870 A1 WO 2020134870A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
frame
main
sub
feed point
Prior art date
Application number
PCT/CN2019/122251
Other languages
English (en)
Chinese (zh)
Inventor
魏鲲鹏
罗建红
周大为
严斌
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2020134870A1 publication Critical patent/WO2020134870A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • 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
    • 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
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • 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
    • H01Q21/00—Antenna arrays or systems

Definitions

  • This application relates to the field of communication technology, and in particular, to an antenna assembly and a mobile terminal.
  • the diversity antenna and the main antenna used in the mobile terminal are generally provided on the top and bottom of the terminal, respectively.
  • the circuit board with the RF front end is located near the top of the terminal, so that the main set antenna is far away from the RF front end.
  • a small board is generally placed near the bottom of the terminal, part of the RF front-end components are placed on the small board, and then the main set antenna is connected to the small board at the lower end of the terminal, and then connected to the The small board and the circuit board are described so that the main antenna is connected to the RF front end of the circuit board, and the cable connection will cause a large insertion loss and affect the RF transmission power.
  • the present application provides an antenna assembly and a mobile terminal, aiming to reduce the insertion loss of the main antenna and the diversity antenna connected to the radio frequency front end in the antenna assembly, and provide better radio frequency transmission power.
  • the present application provides an antenna assembly, the antenna assembly includes a metal frame and a radio frequency front end;
  • the metal frame includes a second frame and a third frame arranged oppositely and a first frame connected between the second frame and the third frame, a part or all of the first frame forms a first antenna, Part or all of the second frame forms a second antenna, one of the first antenna and the second antenna is a main antenna, and the other is a diversity antenna;
  • the RF front end is located inside the metal frame, the distance between the RF front end and the second frame is smaller than the distance between the RF front end and the third frame, the RF front end is connected to the first An antenna and the second antenna.
  • part or all of the first frame forms a first antenna
  • part or all of the second frame forms a second antenna
  • the main antenna, the diversity antenna and the RF front end The distance between them is small, therefore, there is no need to connect the main set antenna and the RF front end through a cable, thereby reducing the insertion loss generated by the RF antenna connecting the main set antenna and the RF front end, and providing better RF transmission power.
  • a primary antenna and a diversity antenna are respectively formed with part or all of the first frame and part or all of the second frame of the metal frame.
  • the antenna assembly further includes a main floor, the main floor is grounded; the main floor is located in the metal frame, and both ends of the first antenna and the second antenna are provided with a main floor Location, the main lower location is connected to the main floor; a first feed point is provided on the first antenna, a second feed point is provided on the second antenna, the first feed point and the first Both feed points are connected to the RF front end, the first antenna excites the main floor to produce a first current parallel to the first frame; the second antenna excites the main floor to produce a first parallel to the second frame Second current.
  • the first antenna excites the main floor to generate the first current at a low frequency
  • the second antenna excites the main floor to generate a second current at a low frequency
  • the first antenna excites the main floor to generate a first current
  • the second antenna excites the main floor to generate a second current
  • the intersection between the first current and the second current makes the main floor
  • the first frame and the second frame are perpendicular, and the first current is orthogonal to the second current direction, so that the main antenna and the diversity antenna
  • the isolation is the best and the envelope correlation coefficient is the lowest.
  • a first slot is provided on the first antenna, and the first slot divides the first antenna into a first sub-section and a second sub-section; the first feed point is located at On the first sub-section, a first capacitor structure is connected between the first feed point and the RF front end.
  • both ends of the first sub-section constitute a parallel distributed inductance in the principle of the left-hand transmission line, and the first capacitor structure is a distributed capacitance structure in the principle of the left-hand transmission line, so that the first sub-section is the In this way, the direction of the current generated by the first sub-section exciting the main floor is more uniformly parallel to the first antenna, so that the isolation between the main antenna and the diversity antenna is better.
  • the main antenna feed is located on the first sub-section, so that the first antenna is a main branch, and the second sub-section is a parasitic branch, so as to assist the parasitic branch
  • the main branch node resonates to supplement the resonance mode through the parasitic branch node, so that the main set antenna can cover a larger operating frequency.
  • a second slot is provided on the second antenna, and the second slot divides the second antenna into a third sub-section and a fourth sub-section; the second feed point is located in the third sub-area On the segment, a second capacitor structure is connected between the second feed point and the radio frequency front end.
  • both ends of the third sub-section form a parallel distributed inductance in the principle of the left-hand transmission line
  • the second capacitor structure is a distributed capacitance structure in the principle of the left-hand transmission line, that is, the third sub-section is a left-hand antenna
  • the current direction generated by the third sub-section exciting the main floor is more uniformly parallel to the second antenna, thereby making the isolation between the main antenna and the diversity antenna better.
  • the first sub-section is away from the second antenna relative to the second sub-section. That is, the main branch of the first antenna is away from the second antenna, thereby further increasing the isolation between the main antenna and the diversity antenna.
  • the isolation degree of the second sub-section relative to the first sub-section is about 10 dB away from the second antenna state, and the first sub-section is relative to the second sub-section The isolation when away from the second antenna state is about 17 dB.
  • a lower point is provided on the first antenna.
  • the lower point of the first antenna and the main floor are connected by a first control switch.
  • the first antenna is provided with a plurality of spaced down points, and a first control switch is connected between each of the down points and the main floor.
  • the first control switch is used to switch between different landing points, so that different positions of the first antenna are connected to the main floor, and the length of the radiator of the first antenna can be changed, thereby changing the main antenna Working frequency, so that the main set antenna can support different working frequency bands.
  • the plurality of lower locations provided on the first antenna include a first lower location provided on the first antenna, and a second sub-section
  • the second lower point of the upper, the first lower point is located on a side of the first feed point away from the second sub-section.
  • the main resonance can be switched by switching the first control switch between the first lower point and the main floor
  • the parasitic resonance can be switched by switching the second control switch between the second lower point and the main floor.
  • the main set antenna can support all frequency bands of low frequency (700-960MHz), intermediate frequency (1700-2200MHz) and high frequency (2300-2700MHz).
  • a lower point or a plurality of spaced lower points are provided on the second antenna, and a second control switch is connected between each lower point and the main floor.
  • the second control switch is used to switch between different landing points, so that different positions of the second antenna are connected to the main floor, and the length of the radiator of the second antenna can be changed, thereby changing the main antenna Working frequency, so that the main set antenna can support different working frequency bands.
  • the lower point provided on the second antenna includes a third lower point and a fourth lower point provided on the third sub-section, and the third lower point The location and the fourth lower location are sequentially located on the side of the second feed point away from the fourth sub-section.
  • the second antenna can work in a low-frequency working frequency band, that is, by switching the third lower point
  • the second control switch between the location and the fourth lower location and the main floor can enable the diversity antenna to support low frequency (700-960MHz), intermediate frequency (1700-2200MHz) and high frequency (2300-2700MHz) All frequency bands.
  • the antenna assembly further includes one or more antenna units
  • the metal frame further includes a fourth frame connected between the first frame and the third frame, Part of the first frame and/or part of the fourth frame form the antenna unit.
  • the antenna unit includes any one or more of a GPS antenna, a WIFI antenna, a MIMO antenna, a WIFI/MIMO two-in-one antenna and a GPS/WIFI/MIMO three-in-one antenna.
  • the antenna unit includes a GPS L5 antenna, a WIFI/MIMO two-in-one antenna, a GPS L1/WIFI/MIMO three-in-one antenna, a radiator of the GPS L5 antenna, and the second The antenna is located on the same side of the metal frame, and the position where the radiator of the GPS L5 antenna is connected to the second antenna is connected to the main floor; part of the fourth frame is the GPS L1/WIFI /MIMO three-in-one antenna radiator, both ends of the GPS L1/WIFI/MIMO three-in-one antenna radiator are connected to the main floor; the WIFI/MIMO two-in-one antenna is located on the GPS L5 antenna Between the GPS L1/WIFI/MIMO three-in-one antenna, one end of the WIFI/MIMO two-in-one antenna close to the GPS L1/WIFI/MIMO three-in-one antenna is connected to the main floor, and the other end is connected to The GPS L5 antennas form gaps at intervals.
  • the GPS L5 antenna is used to receive signals in the GPS L5 frequency band
  • the WIFI/MIMO two-in-one antenna is used to receive WIFI signals or MIMO antenna signals
  • the GPS L1/WIFI/MIMO three-in-one antenna is used to receive GPS L1 frequency band signal or WIFI signal or MIMO antenna signal.
  • the radiator of the GPS L5 antenna and the second antenna are located on the same side of the metal frame, so that each antenna can be closely arranged, so as to reduce the antenna clearance requirement.
  • the radio frequency front end includes a filter, and the filter is used to filter out signals with different operating frequencies from the first antenna or the second antenna.
  • the filter is used to filter out signals with different operating frequencies from the first antenna or the second antenna.
  • the RF front end is connected to the second feed point and the first feed point through a double-pole double-throw switch;
  • the RF front end includes a transmitting unit, a main set receiving unit, and diversity receiving Unit
  • the double-pole double-throw switch has a first state and a second state, and when the double-pole double-throw switch is in the first state, the first feed point is connected to the transmitting unit and the main set receiving unit , The second feed point is connected to the diversity receiving unit; when the double-pole double-throw switch is in the second state, the second feed point is connected to the transmitting unit and the main set receiving unit, the The first feed point is connected to the diversity receiving unit.
  • the present application also provides a mobile terminal.
  • the mobile terminal includes a display screen and the antenna assembly.
  • the metal frame of the antenna assembly is a frame of the mobile terminal. On the border.
  • the frame includes a pair of upper frame, lower frame, and a side frame between the upper frame and the lower frame.
  • the first frame of the antenna assembly is the side frame
  • the second frame of the antenna assembly is part of the upper frame.
  • the main antenna and the diversity antenna are respectively arranged at the positions of the adjacent upper frame and side frame of the frame of the mobile terminal, instead of setting the main antenna at the position of the lower frame.
  • the pulling or bending of the mobile phone ensures the reliability of the mobile terminal, and can avoid the influence of the bottom motion mechanism on the efficiency of the main set antenna in the special mobile terminal architecture.
  • FIG. 1 is a schematic structural diagram of an antenna assembly according to an embodiment of the present application
  • FIG. 2 is a schematic diagram of an antenna assembly according to an embodiment of the present application exciting current generated on a main floor;
  • FIG. 3 is a schematic structural diagram of an antenna assembly according to another embodiment of this application.
  • FIG. 4 is an analysis diagram of the isolation between the main antenna and the diversity antenna at different operating frequencies in the antenna assembly of the two embodiments of FIG. 1 and FIG. 3;
  • FIG 5 is an analysis diagram of the isolation between the main antenna and the diversity antenna at low frequencies in an antenna assembly according to an embodiment of the present application
  • FIG. 6 is an analysis diagram of the isolation between the main antenna and the diversity antenna at an intermediate frequency in an antenna assembly according to an embodiment of the present application
  • FIG 7 is an analysis diagram of the isolation between the main antenna and the diversity antenna at high frequencies in an antenna assembly according to an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of an antenna assembly according to another embodiment of this application.
  • FIG. 9 is a schematic structural diagram of an antenna assembly according to another embodiment of this application.
  • FIG. 10 is a schematic structural diagram of a mobile terminal according to an embodiment of the present application.
  • the antenna assembly 100 includes a metal frame 40 and a circuit board 50.
  • the metal frame 40 includes a second frame 42 and a third frame 43 disposed oppositely, and a first frame 41 connected between the second frame 42 and the third frame 43. Part or all of the first frame 41 forms the first antenna 10, and part or all of the second frame 42 forms the second antenna 20.
  • one of the first antenna 10 and the second antenna 20 is a main antenna and the other is a diversity antenna.
  • the first antenna 10 and the second antenna 20 are both radiators of the antenna unit.
  • the circuit board 50 is provided with a radio frequency front end and a connection line, and the first antenna 10 and the second antenna 20 are respectively connected to the radio frequency front end through the connection line.
  • the circuit board 50 is located inside the metal frame 40, and the distance between the RF front end and the second frame 42 is smaller than the distance between the RF front end and the third frame 43, the RF The front end connects the first antenna 10 and the second antenna 20.
  • the first frame 41 forms the first antenna
  • part or all of the second frame 42 forms the second antenna 20, so that the first antenna 10 and the second antenna 20
  • the distance between the RF front ends is relatively small, therefore, there is no need to connect the first antenna 10 and the RF front end through a cable, thereby reducing the insertion loss caused by the RF antenna connecting the first antenna 10 and the RF front end, and providing a better RF transmission power.
  • the insertion loss of the antenna assembly 100 is 0.5 dB
  • the insertion loss of the antenna assembly 100 is 0.8dB-1dB.
  • the first antenna 10 and the second antenna 20 are formed by part or all of the first frame 41 and part or all of the second frame 42 of the metal frame 40, respectively, when the antenna assembly 100 is applied
  • the metal frame 40 can be used as a side frame of the terminal, thereby reducing the components of the terminal, specifically, the components in the frame of the terminal can be reduced, so that the narrow frame of the terminal can be further realized.
  • the circuit board 50 is a square board.
  • the circuit board 50 includes a first side 51 and a second side 52 that intersect.
  • the first antenna 10 is located on one side of the first side 51.
  • the second antenna 20 is located on one side of the second side 52.
  • the circuit board 50 may also have any other shape, and the first antenna 10 and the second antenna 20 are located on two sides of the circuit board 50 that intersect each other .
  • the metal frame 40 is a square frame
  • the first frame 41 is parallel to the first side 51
  • the second frame 42 is parallel to the second side 52.
  • the antenna assembly 100 further includes a grounded main floor 30, and the main floor 30 is located in the metal frame 40.
  • the circuit boards 50 are stacked and fixed on the main floor 30.
  • the main floor 30 may also be integrated with the circuit board 50 as a whole.
  • a hole may be formed in the main floor 30, and the circuit board 50 may be fixedly disposed in the hole to reduce the volume occupied by the circuit board 50.
  • the circuit board 50 is a PCB board, and the circuit board 50 is provided with a radio frequency front end and a connection line.
  • the radio frequency front end includes a radio frequency transceiver chip 53, a transmitting unit 54 connected to the radio frequency transceiver chip 53, a main set receiving unit 55, and a diversity receiving unit 56.
  • the transmitting unit 54 is used to up-convert and amplify the signal processed by the RF transceiver chip 53 and then transmit it through the antenna (the first antenna 10 or the second antenna 20); the main set receiving unit 55
  • the diversity receiving unit 56 is used to perform frequency selection, amplification, down conversion and other processing on the signals received by the first antenna 10 and the second antenna 20 and send them to the RF transceiver chip 53.
  • a first feed point 11 is provided on the first antenna 10
  • a second feed point 21 is provided on the second antenna 20, and the first feed point 11 and the second feed point 21 are both
  • the RF front end is connected to realize signal transmission between the RF front end and the first antenna 10 through the first feed point 11; the RF front end and the second antenna are realized through the second feed point 21 20 for signal transmission.
  • the transmitting unit 54, the main set receiving unit 55 and the diversity receiving unit 56 of the RF front end are respectively connected to the first antenna 10 and the second antenna 20 through a double-pole double-throw switch .
  • the double-pole double-throw switch has a first state and a second state.
  • the first feed point 11 When the double-pole double-throw switch is in the first state, the first feed point 11 is connected to the transmitting unit 54 and the main set receiving unit 55, and the second feed point 21 is connected to the diversity receiving unit 56 connection, at this time, the first antenna 10 is the main antenna and the second antenna 20 is the diversity antenna; when the double-pole double-throw switch is in the second state, the second feed point 21 and the The transmitting unit 54 and the main receiving unit 55 are connected, the first feed point 11 is connected to the diversity receiving unit 56, the second antenna 20 is a main antenna, and the first antenna 10 is a diversity antenna.
  • the double-pole double-throw switch is in a first state
  • the first antenna 10 is a main antenna
  • the second antenna 20 is a diversity antenna.
  • Both ends of the first antenna 10 and the second antenna 20 are provided with a main lower point, and the main lower point is connected to the main floor 30.
  • the main lower point and the main floor 30 are connected by a metal block 61, so that the position of the main lower point is defined by the positions of the first antenna 10 and the second antenna 20 at both ends
  • the lengths of the first antenna 10 and the second antenna 20 further adjust the operating frequency range of the first antenna 10 and the second antenna 20.
  • the first antenna 10 and the second antenna 20 intersect, and the position where the first antenna 10 and the second antenna 20 intersect is connected to the main floor through the same metal block 61 30.
  • the isolation between the first antenna 10 and the second antenna 20 can be adjusted, and the metal can be removed by the metal block 61.
  • the frame 40 is stably fixed to the main floor 30.
  • the metal block 61 and the metal frame 40 have an integrated structure. It can be understood that, in other embodiments of the present application, the main lower point and the main floor 30 may also be connected by an elastic sheet or a flexible circuit board.
  • the first feed point 11, the second feed point 21 and the RF front end are all connected by a coaxial line, and the outer conductor of the coaxial line is connected to the main floor 30, so The inner conductor of the coaxial cable is connected to the front end of the radio frequency, and the outer conductor and the inner conductor of the coaxial cable are insulated and spaced apart.
  • the first antenna 10 excites the main floor 30 to generate a first current parallel to the first antenna 10; the second antenna 20 excites the main floor 30 to produce a parallel current to the first The second current of the second antenna 20. Since the first antenna 10 and the second antenna 20 intersect, that is, the first current and the second current intersect, so that there is a certain isolation between the first antenna 10 and the second antenna 20 degree. In an embodiment of the present application, the first antenna 10 and the second antenna 20 are perpendicular, that is, the direction of the first current and the second current are orthogonal, so that the first antenna 10 is in this state The isolation from the second antenna 20 is the best, and the envelope correlation coefficient is the lowest. In this embodiment, the first current and the second current are obtained by exciting the first antenna 10 and the second antenna 20 at a low frequency.
  • the first antenna 10 is provided with a first slot 411, and the first slot 411 divides the first antenna 10 into a first sub-section 412 and a second ⁇ subsection 413.
  • the first feed point 11 is located on the first sub-section 412.
  • the first sub-section 412 is a main branch of the first antenna 10
  • the second sub-section 413 is a parasitic branch of the first antenna 10.
  • the parasitic branch assists the main branch in resonance, and the parasitic branch supplements the resonance mode so that the first antenna 10 can cover a larger operating frequency.
  • a first capacitor structure is also connected between the first feed point 11 and the RF front end, and the main branch node is a left-handed (LH) antenna, so that the main branch node can excite the main floor 30 generates a first current that is more concentrated in the direction of the first antenna to achieve better isolation between the first antenna 10 and the second antenna 20.
  • both ends of the first sub-section 412 form a parallel distributed inductance in the principle of the left-hand transmission line
  • the first capacitor structure is a distributed capacitance structure in the principle of the left-hand transmission line, so that the first sub-section 412 is The form of the left-hand antenna.
  • a second slot 421 is provided on the second antenna 20, and the second slot 421 divides the second antenna 20 into a third sub-section 422 and a fourth sub-section Section 423.
  • the second feed point 21 is located on the third sub-section 422.
  • a second capacitor structure is connected between the second feed point 21 and the RF front end, so that the third sub-section 422 is a left-handed (LH) antenna, so that the second antenna 20 can excite the
  • the main floor 30 generates a second current that is more concentrated in the direction of the second antenna 20 to achieve better isolation between the first antenna 10 and the second antenna 20.
  • both ends of the third sub-section 422 form a parallel distributed inductance in the principle of the left-hand transmission line
  • the second capacitor structure is a distributed capacitance structure in the principle of the left-hand transmission line, so that the third sub-section 422 is The form of the left-hand antenna.
  • the second antenna 20 excites the flow of the second current of the main floor 30 in a more concentrated direction along the second antenna 20.
  • the 0.5-wavelength mode on the long side that is, when the length from the first feed point 11 on the first sub-section 412 to the main lower point of the first antenna 10 is 0.5-wavelength
  • the The first antenna 10 excites the flow of the first current of the main floor 30 in a more concentrated direction along the first antenna 10.
  • the length from the second feed point 21 on the third sub-section 422 to the main lower point of the second antenna 20 is 0.5 times the wavelength; on the first sub-section 412
  • the length from the first feed point 11 to the main lower point of the first antenna 10 is 0.5 times the wavelength, so that the first antenna 10 and the second antenna 20 have better isolation.
  • the first sub-section 412 is away from the second antenna 20 relative to the second sub-section 413; the third sub-section 422 is relative to the fourth sub-section 423 is away from the first antenna 10, that is, the main branch of the first antenna 10 is away from the second antenna 20, thereby further increasing the isolation 20 of the first antenna 10 from the diversity antenna.
  • the second sub-section 413 may also be away from the second antenna 20 relative to the first sub-section 412.
  • FIG. 4 is a comparison diagram of the isolation between the antenna assembly of the embodiment shown in FIG. 1 and the embodiment of FIG. 3 at different operating frequencies.
  • the abscissa of the figure is frequency and the unit is GHz; the ordinate is isolation and the unit is dB. It can be seen from the figure that in the embodiment shown in FIG. 1, the isolation between the first antenna 10 and the second antenna 20 is the largest at 0.92828 GHz, reaching 16.937 dB; for the embodiment shown in FIG. 3, At 0.9347 GHz, the isolation between the first antenna 10 and the second antenna 20 is the largest, reaching 10.164 dB.
  • FIG. 5 to FIG. 7 show that the distance between the first antenna 10 and the second antenna 20 of the antenna assembly 100 of the embodiment shown in FIG. 1 is less than 0.5 times the wavelength. 700-960MHz), the isolation diagram of the first antenna 10 and the second antenna 20 at the intermediate frequency (1700-2200MHz) and high frequency (2300-2700MHz).
  • the abscissa of the figure is frequency and the unit is GHz; the ordinate is isolation and the unit is dB.
  • the isolation between the first antenna 10 and the second antenna 20 is greater than 17.346 dB; from FIG.
  • the isolation of the second antenna 20 is greater than 18.56dB; as can be seen from FIG. 7, at high frequencies, the isolation of the first antenna 10 and the second antenna 20 is greater than 12.467dB. That is to say, in the embodiment shown in FIG. 1, the isolation between the first antenna 10 and the second antenna 20 in each frequency band (low frequency, intermediate frequency, high frequency) is greater than 12 dB, and has a good envelope correlation coefficient (ECC ), that is, the isolation between the first antenna 10 and the second antenna 20 is better.
  • ECC envelope correlation coefficient
  • the first antenna 10 is provided with a lower point or multiple lower points.
  • the lower point of each first antenna 10 and the main floor 30 are connected by a first control switch.
  • the first control switch is used to switch between different landing points, so that different positions of the first antenna 10 are connected to the main floor 30, the length of the radiator of the first antenna 10 can be changed, and then the first An operating frequency of an antenna 10, so that the first antenna 10 can support different operating frequency bands.
  • the lower point of the first antenna 10 and the main floor 30 are connected by a spring sheet or a flexible circuit board, and the first control switch may be connected to the Describe the flexible circuit board.
  • the lower location provided on the first antenna 10 includes a first lower location 621 provided on the first sub-section 412, and a second location provided on the second The second lower point 622 on the sub-section 413, so that the main resonance can be switched by switching the first control switch between the first lower point 621 and the main floor 30, and by switching between the second lower point 622 and the main floor 30
  • the first control switch switches the parasitic resonance.
  • the second lower point 621 is located on a side of the first feed point 11 away from the second sub-section 413. It can be understood that, in other embodiments of the present application, the first lower point 611 and the second lower point 622 may be located at other positions on the first antenna 10.
  • the main control resonance is switched by switching the first control switch between the first lower point 621 and the main floor 30, and the parasitic main resonance is switched by switching the first control switch between the second lower point 621 and the main floor 30.
  • the main set antenna 10 can support all frequency bands of low frequency (700-960MHz), intermediate frequency (1700-2200MHz), and high frequency (2300-2700MHz), and in each frequency band, the main resonance works with the parasitic resonance.
  • the second antenna 20 is provided with a lower point or a plurality of spaced lower points, between the lower point of the second antenna 20 and the main floor 30 Connected via the second control switch.
  • the second control switch is used to switch between different lower locations, so that different positions of the second antenna 20 are connected to the main floor 30, and the length of the radiator of the second antenna 20 can be changed, thereby changing the main The working frequency of the set antenna, so that the main set antenna can support different working frequency bands.
  • the lower point provided on the second antenna 20 includes a third lower point 623 and a fourth lower point 624 provided on the third sub-section 422.
  • the third lower point 623 and the fourth lower point 624 are sequentially located on the side of the second feed point 21 away from the fourth sub-section 423.
  • the second antenna 20 can work in the low frequency working frequency band, That is, by switching the second control switch between the third lower point 623 and the fourth lower point 624 and the main floor 30, the diversity antenna can support low frequency (700-960MHz) and intermediate frequency (1700 -2200) and high frequency (2300-2700) all frequency bands.
  • the antenna assembly 100 further includes one or more antenna units 70 to cooperate with the first antenna 10 and the second antenna 20 through the antenna unit 70 Realize the communication of multiple signals. Furthermore, the antenna unit 70 and the first antenna 10 and the second antenna 20 can work simultaneously, thereby enabling simultaneous transmission of signals in multiple frequency bands.
  • the antenna unit 70 is also located around the circuit board 50 and uses a part of the metal frame 40 as a radiation portion. Therefore, the distance between the antenna unit 70 and the circuit board 50 is shortened, and the insertion loss caused by the radio frequency front end connected to the antenna unit 70 and the circuit board 50 by the cable is reduced.
  • the metal frame 40 further includes a fourth frame 44 connected between the second frame 42 and the third frame 43, the fourth frame 44 is opposite to the first frame 41 , Part of the second frame 42 and/or part of the fourth frame 44 form a radiator of the antenna unit 70.
  • the antenna unit 70 may include any one or more of a GPS antenna, a WIFI antenna, a MIMO antenna, a WIFI/MIMO two-in-one antenna, and a GPS/WIFI/MIMO three-in-one antenna.
  • the antenna unit 70 includes a GPS L5 antenna 71, a WIFI/MIMO two-in-one antenna 72, and a GPS L1/WIFI/MIMO three-in-one antenna 73.
  • the GPS L5 antenna 71 is used to receive GPS L5 frequency band signals
  • the WIFI/MIMO two-in-one antenna 72 is used to receive WIFI signals or MIMO antenna signals
  • the GPS L1/WIFI/MIMO three-in-one antenna 73 is used to receive signals in the GPS L1 frequency band or WIFI signals or MIMO antenna signals.
  • the antenna unit 70 may also be other types of antenna units, for example, antennas for receiving signals of various frequency bands of the Beidou satellite positioning system.
  • the radiator of the GPS L5 antenna 71 and the second antenna 20 are both part of the first frame 41 of the metal frame 40, so that the antennas can be closely arranged to reduce the antenna's clearance requirements .
  • the radiator of the GPS L5 antenna 71 is far away from the first antenna 10 relative to the second antenna 20.
  • the position where the radiator of the GPS L5 antenna 71 is connected to the second antenna 20 is connected to the main floor 30 through a connector such as an elastic sheet or a flexible current plate.
  • the fourth frame 44 described in part is the radiator of the GPS L1/WIFI/MIMO three-in-one antenna 73, and both ends of the radiator of the GPS L1/WIFI/MIMO three-in-one antenna 73 also pass through elastic sheets or flexible A connecting piece such as a current plate is connected to the main floor 30.
  • the radiator of the GPS L1/WIFI/MIMO three-in-one antenna 73 is provided with a fourth slot 441, through which the radiator of the GPS L1/WIFI/MIMO three-in-one antenna 73 is divided into There are two parts, one of which is provided with a third feed point 731 connected to the RF front end of the circuit board 50. In this embodiment, the third feed point 731 is connected to the circuit board 50 through an elastic sheet.
  • a capacitive structure is further connected between the third feed point 731 and the circuit board 50, so that the GPS L1/WIFI/MIMO triple antenna 73 forms a left-hand antenna Structure to stimulate the main floor 30 to generate a third current parallel to the first antenna 10, so as to achieve better isolation between the GPS L1/WIFI/MIMO three-in-one antenna 73 and other antennas.
  • the fourth slot 441 is disposed opposite to the first slot 411 on the first antenna 10, so that the metal frame 40 has a better appearance effect, and at the same time, the metal frame 40 is more Easy to process.
  • the WIFI/MIMO two-in-one antenna 72 is located between the GPS L5 antenna 71 and the GPS L1/WIFI/MIMO three-in-one antenna 73, and the WIFI/MIMO two-in-one antenna 72 is close to the GPS L1/ One end of the WIFI/MIMO three-in-one antenna 73 is connected to the main floor 30, and the other end is spaced apart from the GPS L5 antenna 71 to form a third slot 431.
  • the third slot 431 is larger than the size of the first slot 411, so that the isolation between the GPS L5 antenna 71 and the WIFI/MIMO two-in-one antenna 72 is large, and the antennas are avoided The mutual influence.
  • a fourth feed point 711 is provided on the GPS L5 antenna 71, and the fourth feed point 711 is connected to the radio frequency front end through a shrapnel, so as to realize the sending and receiving function of the GPS L5 antenna 71.
  • a fifth feed point 721 is provided on the WIFI/MIMO two-in-one antenna 72, and the fifth feed point 721 is connected to the radio frequency front end through an elastic sheet, so as to realize the sending and receiving function of the WIFI/MIMO two-in-one antenna 72.
  • the radio frequency front end includes a filter, and the filter is used to filter out signals with different operating frequencies from the first antenna 10 and the second antenna 20.
  • the filter is used to filter out signals with different operating frequencies from the first antenna 10 and the second antenna 20.
  • the present application also provides a mobile terminal 200.
  • the mobile terminal 200 includes a display screen 210 and a back cover 220 opposite to the display screen 210, and is provided on the display screen 210 and the The bezel 230 between the back cover 220, and the antenna assembly 100, the display screen 210 and the back cover 220 are fixed on the bezel 230.
  • the frame 230 is metal
  • the frame 230 is the metal frame 40 of the antenna assembly 100.
  • the frame 230 includes an upper frame 231, a lower frame 232, and two side frames 233 located between the upper frame 231 and the lower frame 232 and opposite to each other.
  • the first frame 41 of the metal frame 40 of the antenna assembly 100 is one side frame 233, and the fourth frame 44 is another side frame 233.
  • the second frame 42 is the upper frame 231
  • the third frame 43 of the antenna assembly 100 is the lower frame 232.
  • the two antennas 20 are respectively disposed on the lower frame 232 and the upper frame 231, so that there is no clearance requirement near the lower frame 232 of the mobile terminal 200, which is beneficial to the realization of the mobile device 200 with a very small chin.
  • there is no need to connect the circuit board 50 and the bottom small board through a cable so that it can be adapted to the needs of special mobile terminal 200 architectures such as slide covers, flip covers, and bottom pop-ups.
  • the pulling or bending caused by the cable ensures the reliability of the mobile terminal 200, and can avoid the influence of the bottom motion mechanism on the efficiency of the main antenna in the special mobile terminal 200 architecture.

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

La présente invention concerne un ensemble antenne et un terminal mobile. L'ensemble antenne comprend un premier cadre et un troisième cadre agencés à l'opposé l'un de l'autre et un deuxième cadre connecté entre ledit premier cadre et ledit troisième cadre ; une partie ou la totalité du premier cadre d'un cadre métallique forme une première antenne, et une partie ou la totalité du deuxième cadre du cadre métallique forme une seconde antenne ; l'une de la première antenne et de la seconde antenne est une antenne principale et l'autre est une antenne à diversité. En outre, la distance entre l'extrémité avant radiofréquence reliant l'antenne principale et l'antenne à diversité et le premier cadre est inférieure à la distance entre l'extrémité avant radiofréquence et le troisième cadre, de telle sorte que les distances à la fois de l'antenne principale et de l'antenne à diversité à l'extrémité avant radiofréquence sont plus petites ; il n'est pas nécessaire d'agencer un câble connectant une carte de circuit imprimé et une petite carte, par conséquent la perte d'insertion provoquée par des connexions de câble est réduite et une meilleure puissance de transmission radiofréquence est fournie.
PCT/CN2019/122251 2018-12-29 2019-11-30 Ensemble antenne et terminal mobile WO2020134870A1 (fr)

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