WO2018219071A1 - Structure multi-antenne de terminal et terminal mobile - Google Patents

Structure multi-antenne de terminal et terminal mobile Download PDF

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Publication number
WO2018219071A1
WO2018219071A1 PCT/CN2018/084254 CN2018084254W WO2018219071A1 WO 2018219071 A1 WO2018219071 A1 WO 2018219071A1 CN 2018084254 W CN2018084254 W CN 2018084254W WO 2018219071 A1 WO2018219071 A1 WO 2018219071A1
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WO
WIPO (PCT)
Prior art keywords
antenna
spacer
slit
frequency selection
antenna structure
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Application number
PCT/CN2018/084254
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English (en)
Chinese (zh)
Inventor
蒋锐
黄奂衢
陈玉稳
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维沃移动通信有限公司
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Application filed by 维沃移动通信有限公司 filed Critical 维沃移动通信有限公司
Publication of WO2018219071A1 publication Critical patent/WO2018219071A1/fr

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    • 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
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas

Definitions

  • the present disclosure relates to the field of electronic technologies, and more particularly, to a terminal multi-antenna structure and a mobile terminal.
  • a mobile terminal with a high proportion of metal or conductive components is used, and a certain structure (two or more) of a slit 100 is often used in the antenna structure of the mobile terminal.
  • the antenna arm 200 has a relatively strong electric field strength when the side of the slit is used as the radiating end of the antenna, so that it is easier to couple to the antenna on the other side of the slit, and the isolation between the multiple antennas is deteriorated.
  • MIMO Multiple-Input Multiple-Output
  • the technical problem to be solved by the present disclosure is to provide an antenna structure and a mobile terminal to solve the problem of poor isolation between multiple antennas of a mobile terminal in the related art, and cannot meet the requirement of MIMO multi-antenna.
  • a terminal multi-antenna structure including:
  • the metal portion is provided with at least one slit, and the metal structures on both sides of the fracture correspond to at least one antenna arm respectively;
  • At least one spacer for isolating the antenna arms on both sides is disposed in the slit, the spacer having electrical conductivity;
  • the isolation piece selects a network ground through a preset frequency, and selects a network connection source through another preset frequency to be grounded.
  • a mobile terminal comprising: the terminal multi-antenna structure as described above.
  • the terminal multi-antenna structure of the embodiment of the present disclosure has a metal portion forming an antenna, the metal portion is provided with at least one slit, and the metal structures on both sides of the fracture correspond to at least one antenna arm respectively; At least one spacer of the antenna arms on both sides, the spacer is electrically conductive; wherein the spacer is grounded by a predetermined frequency selection network, and is connected to the feed source through another preset frequency selection network and grounded.
  • the isolation piece selects the network ground through the preset frequency, so that the isolation piece can have different impedance responses to the antennas on both sides of the fracture, thereby improving the isolation between the multiple antennas and improving the degree of freedom of antenna performance debugging. Moreover, the break width of the slit to be increased can be reduced, the appearance effect is ensured, and the overall product competitiveness and user experience can be maintained.
  • the isolation piece is matched with the feed and the preset frequency selection network, and the function of one antenna can be achieved under the effect of reducing the original isolation effect, thereby achieving the design of the multi-antenna corresponding to MIMO, thereby meeting the application requirements of the MIMO in the related art, and further Enhance overall product competitiveness and user experience. The problem of poor isolation between multiple antennas of a mobile terminal in the related art is solved, and the problem of MIMO multi-antenna demand cannot be satisfied.
  • FIG. 1 is a schematic diagram of a terminal multi-antenna structure in the related art
  • FIG. 2 is a schematic diagram of a multi-antenna structure of the terminal of the present disclosure
  • FIG. 3 is a schematic diagram of a specific implementation of a multi-antenna structure of a terminal according to the present disclosure
  • FIG. 4 is another schematic diagram of a multi-antenna structure of the terminal of the present disclosure.
  • FIG. 5 is a schematic diagram of another specific implementation of the multi-antenna structure of the terminal of the present disclosure.
  • a terminal multi-antenna structure including:
  • the metal portion 1, the metal portion 1 is provided with at least one slit 11, the metal structures on both sides of the fracture 11 respectively correspond to at least one antenna arm 12;
  • the slit 11 is provided with at least one spacer 2 for isolating the two antenna arms 12, and the spacer 2 has electrical conductivity;
  • the spacer 2 is grounded through a preset frequency selection network 31, and is connected to the feed 5 through another preset frequency selection network 32 to be grounded.
  • the spacer 2 is grounded through the preset frequency selection network 31, so that the spacer 2 can have different impedance responses to the antennas on both sides of the slit, thereby improving the isolation between the multiple antennas and improving the degree of freedom in debugging the performance of the antenna.
  • the spacer 2 is matched with the feed 5 and the preset frequency selection network 32, and can achieve the function of one antenna under the effect of reducing the original isolation effect, thereby achieving the design of the multi-antenna corresponding to MIMO.
  • the spacer 2 is a separate structure inserted in the slit, and the spacer 2 may be made of a metal material (but is not limited thereto).
  • At least one spacer 2 for isolating the two side antenna arms 12 may be provided in each of the slits 11 respectively.
  • the plurality of isolation sheets 2 are grounded by the preset frequency selection network 32 connected to the feed source 5, and the design of the multi-antenna corresponding to MIMO is achieved.
  • the metal portion 1 may be an inner metal outline of a metal frame, a metal ring, a metal shell or a non-metal material, or a multi-antenna structure in a non-metallic shape and a contour.
  • a part of the metal casing may be laterally hollowed out, divided into an antenna area and a main ground, the antenna area is used as the metal part 1, and a slit 11 is arranged in the longitudinal direction of the antenna area, and is broken into at least two.
  • Antenna arm 12 is used when a metal casing is used, a part of the metal casing may be laterally hollowed out, divided into an antenna area and a main ground, the antenna area is used as the metal part 1, and a slit 11 is arranged in the longitudinal direction of the antenna area, and is broken into at least two.
  • Antenna arm 12 is arranged in the longitudinal direction of the antenna area, and is broken into at least two.
  • the spacer 2 by adding the spacer 2 to the slit 11 between the antennas, the mutual coupling between the multiple antennas on both sides of the fracture 11 is reduced, the isolation between the multiple antennas is improved, and the optimization is optimized. Antenna performance.
  • the spacer 2 is grounded through the preset frequency selection network 31, so that the spacer 2 can have different impedance responses to the antennas on both sides of the slit 11 to improve the isolation between the multiple antennas and improve the degree of freedom in debugging the antenna performance. .
  • the breaking width of the slit 11 to be increased can be reduced, the appearance effect is ensured, and the overall product competitiveness and user experience can be maintained.
  • the spacer 2 is matched with the feed 5 and the preset frequency selection network 32, and can achieve the function of one antenna under the effect of reducing the original isolation effect, thereby achieving the design of the multi-antenna corresponding to MIMO, thereby satisfying the application of MIMO in the related art.
  • Demand further enhances overall product competitiveness and user experience.
  • the problem of poor isolation between multiple antennas of a mobile terminal in the related art is solved, and the problem of MIMO multi-antenna demand cannot be satisfied.
  • each of the antenna arms 12 is electrically connected to the spacer 2 closest to the antenna arm 12 by a predetermined frequency selection network 33.
  • the predetermined frequency selection network 33 is electrically connected with different antenna arms 12 on both sides of the slit 11 to realize frequency division filtering, and the path of the low frequency current is extended by frequency division filtering (because the required current path and work)
  • the frequency is inversely correlated), which improves the performance of low-frequency functions, such as improving the performance of the 13.56MHz NFC (Near Field Communication) function (but not limited to this), and reduces the impact on other antennas.
  • the slit 11 is provided with one of the spacers 2, and the spacer 2 is grounded through a preset frequency selection network 31, and passed through another A preset frequency selection network 32 is connected to the feed 5 and grounded.
  • the spacer 2 is inserted in the slit 11 between the multiple antennas, and the spacer 2 is grounded through the preset frequency selection network 31, that is, a spacer having frequency selectivity is inserted in the slit 11 between the multiple antennas. 2.
  • the spacer 2 can have different impedance responses to the antennas on both sides of the fracture 11, thereby improving the isolation between the multiple antennas and improving the degree of freedom in debugging the antenna performance.
  • the spacer 2 is matched with the feed 5 and the preset frequency selection network 32, and can achieve the function of one antenna under the effect of reducing the original isolation effect, thereby achieving the design of the multi-antenna corresponding to MIMO.
  • an antenna feed 5 (such as WiFi 802.11a, 5.15 GHz to 5.85 GHz feed, but not limited thereto) is newly added, and the network 32 is connected to the spacer 2 via the preset frequency selection, and the preset frequency is selected by design.
  • the network 32 may cause the spacer 2 and the newly added feed 5 to be substantially open, and by designing the preset frequency selection network 31, the newly added feed 5 to ground may also be substantially open (but not limited thereto).
  • the spacer 2 can reach the antennas on both sides of the isolation slit and combine the functions of another new antenna, and combined with other spacers 2 to achieve a multi-antenna design corresponding to MIMO.
  • the above-mentioned terminal multi-antenna structure of the present disclosure can perform corresponding frequency selection design for the antenna operating frequencies on both sides of the fracture 11 so that the impedance loads felt by the two antennas to the same spacer 2 are different.
  • the spacer 2 can be close to the short-circuit state on one side of the fracture 11 and close to the open on the other antenna. The state, so that the antenna on both sides of the fracture 11 can have different responses and effects, so there is a higher degree of freedom in antenna performance debugging.
  • the position of the spacer 2 can be optimized, that is, the spacer 2 can be disposed in the slit 11 in a centered manner, or can be set in a non-centered manner. In the fracture 11 to achieve better antenna performance.
  • the spacer 2 when the spacer 2 presents a short-circuit (ground) state to a side antenna, the spacer 2 can be adjusted to deviate from the side antenna, that is, the antenna that presents the open state to the other side is approached to reduce the short circuit condition.
  • the effect on the performance of the side antenna Moreover, this method can often reduce the need to increase the breaking width of the slit 11 to ensure the appearance effect and have better antenna performance.
  • each antenna arm 12 can be connected to the ground through a feed 5, and the feed 5 generally refers to a portion where the feed line is connected to the antenna, and the feed line generally refers to a transmission line whose RF front end is connected to the antenna.
  • the metal portion 1 in which the antenna arm 12 and the slit 11 are disposed may be the top or bottom of the metal middle frame (but is not limited thereto).
  • Two slits 11 may be arranged at the top or bottom of the metal middle frame to break the metal middle frame into three metal structures, wherein the metal structure between the two fractures 11 is divided into two antenna arms 12 by grounding, and the other two The metal structures act as an antenna arm 12, respectively, thereby breaking the top or bottom of the metal middle frame into four antenna arms 12, each antenna arm 12 being grounded through a feed source 5.
  • a slit 2 is disposed in the slit 11 and the spacer 2 is a separate structure inserted in the slit 11 .
  • the spacer 2 is grounded through a preset frequency selection network 31, and is connected to the feed source 5 through another preset frequency selection network 32 to be grounded.
  • the preset frequency selection network and the feed are disposed between the metal middle frame and the main ground 4 of the terminal circuit.
  • the spacer 2 is grounded through the preset frequency selection network 31, so that the spacer 2 can have different impedance responses to the antennas on both sides of the slit 11 to improve the degree of freedom in antenna performance debugging.
  • the spacer 2 is matched with the feed 5 and the preset frequency selection network 32, and can achieve the function of one antenna under the effect of reducing the original isolation effect, thereby achieving the design of the multi-antenna corresponding to MIMO.
  • the spacer 2 may be placed in the slit 11 in a centered or uncentered manner to achieve better antenna performance.
  • the spacer 2 is grounded through the preset frequency selection network 31, so that the spacer 2 can have different impedance responses to the antennas on both sides of the slit 11 to improve the isolation between the multiple antennas and improve the degree of freedom in debugging the antenna performance. . Moreover, the breaking width of the slit 11 to be increased can be reduced, the appearance effect is ensured, and the overall product competitiveness and user experience can be maintained.
  • the spacer 2 is matched with the feed 5 and the preset frequency selection network 32, and can achieve the function of one antenna under the effect of reducing the original isolation effect, thereby achieving the design of the multi-antenna corresponding to MIMO, thereby satisfying the application of MIMO in the related art. demand.
  • the spacer 11 is provided with one of the spacers 2, and the spacer 2 is grounded through a preset frequency selection network 31 and passed through Another preset frequency selection network 32 is connected to the feed 5 and grounded, and each of the antenna arms 12 is electrically connected to the spacer 2 closest to the antenna arm 12 via a preset frequency selection network 33.
  • the spacer 2 is inserted in the slit 11 between the multiple antennas, and the spacer 2 is grounded through the preset frequency selection network 31, that is, a spacer having frequency selectivity is inserted in the slit 11 between the multiple antennas. 2.
  • the spacer 2 can have different impedance responses to the antennas on both sides of the fracture 11, thereby improving the isolation between the multiple antennas and improving the degree of freedom in debugging the antenna performance.
  • the frequency division filtering is realized, and the path of the low frequency current is extended by the frequency division filtering (because the required current path and the working frequency are Reverse correlation) improves the performance of low-frequency functions, such as (but not limited to) the performance of the 13.56MHz NFC function, and reduces the impact on other antennas.
  • the grounded preset frequency selection network 31 also plays the role of not allowing the low frequency current path to be directly connected to the ground, so that the low frequency performance is further improved.
  • the spacer 2 is matched with the feed 5 and the preset frequency selection network 32, and can achieve the function of one antenna under the effect of reducing the original isolation effect, thereby achieving the design of the multi-antenna corresponding to MIMO.
  • an antenna feed 5 (such as WiFi 802.11a, 5.15 GHz to 5.85 GHz feed, but not limited thereto) is newly added, and the network 32 is connected to the spacer 2 via the preset frequency selection, and the preset frequency is selected by design.
  • the network 32 may cause the spacer 2 and the newly added feed 5 to be substantially open, and by designing the preset frequency selection network 31, the newly added feed 5 to ground may also be substantially open (but not limited thereto).
  • the spacer 2 can reach the antennas on both sides of the isolation slit and combine the functions of another new antenna, and combined with other spacers 2 to achieve a multi-antenna design corresponding to MIMO.
  • the above-mentioned terminal multi-antenna structure of the present disclosure can perform corresponding frequency selection design for the antenna operating frequencies on both sides of the fracture 11 so that the impedance loads felt by the two antennas to the same spacer 2 are different.
  • the spacer 2 can be close to the short-circuit state on one side of the fracture 11 and close to the open on the other antenna. The state, so that the antenna on both sides of the fracture 11 can have different responses and effects, so there is a higher degree of freedom in antenna performance debugging.
  • the position of the spacer 2 can be optimized, that is, the spacer 2 can be disposed in the slit 11 in a centered manner, or can be set in a non-centered manner. In the fracture 11 to achieve better antenna performance.
  • the spacer 2 when the spacer 2 presents a short-circuit (ground) state to a side antenna, the spacer 2 can be adjusted to deviate from the side antenna, that is, the antenna that presents the open state to the other side is approached to reduce the short circuit condition.
  • the effect on the performance of the side antenna Moreover, this method can often reduce the need to increase the breaking width of the slit 11 to ensure the appearance effect and have better antenna performance.
  • each antenna arm 12 can be connected to the ground through a feed 5, and the feed 5 generally refers to a portion where the feed line is connected to the antenna, and the feed line generally refers to a transmission line whose RF front end is connected to the antenna.
  • the metal portion 1 in which the antenna arm 12 and the slit 11 are disposed may be the top or bottom of the metal middle frame (but is not limited thereto).
  • Two slits 11 may be arranged at the top or bottom of the metal middle frame to break the metal middle frame into three metal structures, wherein the metal structure between the two fractures 11 is divided into two antenna arms 12 by grounding, and the other two The metal structures act as an antenna arm 12, respectively, thereby breaking the top or bottom of the metal middle frame into four antenna arms 12, each antenna arm 12 being grounded through a feed source 5.
  • a slit 2 is disposed in the slit 11 and the spacer 2 is a separate structure inserted in the slit 11 .
  • the spacer 2 is grounded through a preset frequency selection network 31, and is connected to the feed source 5 through another preset frequency selection network 32, and the antenna arm 12 on both sides of the fracture 11 and the spacer closest to the antenna arm 12 are separated.
  • the network 33 is electrically connected between the two by a preset frequency.
  • the preset frequency selection network and the feed are disposed between the metal middle frame and the main ground 4 of the terminal circuit.
  • the spacer 2 is grounded through the preset frequency selection network 31, so that the spacer 2 can have different impedance responses to the antennas on both sides of the slit 11 to improve the degree of freedom in antenna performance debugging.
  • the spacer 2 is matched with the feed 5 and the preset frequency selection network 32, and can achieve the function of one antenna under the effect of reducing the original isolation effect, thereby achieving the design of the multi-antenna corresponding to MIMO.
  • the predetermined frequency selection network 33 is electrically connected with different antenna arms 12 on both sides of the slit 11 to realize frequency division filtering, and the frequency division filter can extend the path of the low frequency current to improve the low frequency performance. For example, referring to FIG.
  • the first feed source 51 is a feed of NFC
  • the broken line A in FIG. 5 is the extended NFC current path of the present disclosure, so that it is not restricted by the appearance of the fracture. Good user experience.
  • One end of the broken line A is the first feed source 51, and the other end is grounded by the antenna arm 12.
  • the spacer 2 may be placed in the slit 11 in a centered or uncentered manner to achieve better antenna performance.
  • the spacer 2 by adding the spacer 2 to the slit 11 between the antennas, the mutual coupling between the multiple antennas on both sides of the slit 11 is reduced, the isolation between the multiple antennas is improved, and the antenna performance is optimized. Moreover, the breaking width of the slit 11 to be increased can be reduced, the appearance effect is ensured, and the overall product competitiveness and user experience can be maintained. Moreover, the low frequency performance is improved, and the spacer 2 can have different impedance responses to the antennas on both sides of the fracture 11 to improve the degree of freedom in antenna performance debugging.
  • the spacer 2 is matched with the feed 5 and the preset frequency selection network 32, and can achieve the function of one antenna under the effect of reducing the original isolation effect, thereby achieving the design of the multi-antenna corresponding to MIMO, thereby satisfying the application of MIMO in the related art. demand.
  • the preset frequency selection network in the embodiments of the present disclosure may be combined by one or more of a capacitor, an inductor, a magnetic bead, a resistor, and a filter by series and/or parallel.
  • the preset frequency selection network is an adjustable frequency selection network or a fixed (ie, non-adjustable) frequency selection network. The specific settings can be made according to actual needs.
  • the preset frequency selection network may be a network having a specific frequency selection function that meets the requirements in combination with the experimental data.
  • the adjustable frequency selection network is a frequency selective network with adjustable parameters
  • the fixed frequency selection network is a frequency selection network with non-adjustable parameters
  • the spacer 2 may be placed in the slit 11 in a centered or uncentered manner to further optimize antenna performance.
  • the plurality of spacers 2 may be included in the slit 11, the plurality of spacers 2 may be disposed as a whole in a centered or not centered manner.
  • the length of the grounding path of the spacer 2 is optionally smaller than the length of the shortest antenna arm 12 on both sides of the slit 11.
  • the width of the slit 11 is less than or equal to 100 mm; the total thickness of all the spacers 2 in the slit 11 is less than or equal to 50 mm.
  • the cross-sectional area of the spacer 2 may be smaller than the cross-sectional area of the metal structure on both sides of the slit 11 so that the spacer 2 is not covered by the non-metallic material in the slit 11.
  • all of the conductive structures described herein, such as spacers, may be made of a metal material (but are not limited thereto).
  • the multi-antenna structure of the terminal in the embodiment of the present disclosure utilizes a relatively simple, mature, stable, and low-cost design implementation scheme, which reduces the mutual coupling between multiple antennas on both sides of the fracture 11 and improves the inter-connectivity between the multiple antennas. Isolation optimizes antenna performance.
  • one or more of the above-mentioned spacers 2 to be connected to the ground through an adjustable or fixed frequency selection network or the like, and designing different impedance load environments for the antennas on both sides of the fracture 11 as a pair of fractures 11 spacers 2 for the antennas on both sides (especially for multiple antennas with the same frequency or similar operating frequency), and reduce the mutual coupling between the multiple antennas of the fracture 11 and improve the isolation, so that the antenna performance is improved.
  • the antenna performance can be optimized again.
  • the spacer 2 is properly designed, such as the matching source 5 and the preset frequency selection network, can achieve the function of one antenna under the effect of reducing the original isolation effect, and thus can achieve the design of the multi-antenna corresponding to MIMO. And through the adjustable or fixed frequency selection network and the antenna arm 12 on both sides of the fracture 11 electrical connection, can achieve better isolation and improve the performance of low frequency (such as NFC). Moreover, the solution of the present disclosure may have a greater chance of achieving better multi-antenna performance without significantly increasing the width of the appearance slit 11 and thus maintaining a better overall product competitiveness and user experience.
  • the spirit of the present disclosure is directed to multiple antennas (not limited to the metal ring and the broken joint on the metal shell, as long as it is applicable between multiple antennas, that is, it can also be used for the non-metallic material shape and the multi-antenna structure in the contour. Inserting one or more (more than one) of the above-mentioned spacers 2, and selecting the frequency by (adjustable or fixed) inductor/capacitor/bead/resistor/filter or its series/parallel mixing The network is reconnected to the ground as a spacer 2 for isolation between multiple antennas, and is enhanced by matching a new antenna feed with an appropriate frequency selection network to achieve better antenna performance and multi-antenna design.
  • a mobile terminal comprising: the terminal multi-antenna structure as described in the above embodiments.
  • implementation embodiments of the foregoing terminal multi-antenna structure are applicable to the embodiment of the mobile terminal, and the same technical effects can be achieved.
  • the mobile terminal of the present disclosure may be, for example, a computer, a tablet computer, a personal digital assistant (PDA), or a vehicle-mounted computer.
  • PDA personal digital assistant

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Abstract

La présente invention concerne une structure multi-antenne de terminal et un terminal mobile. La structure multi-antenne de terminal comprend : une partie métallique, la partie métallique étant pourvue d'au moins un joint rompu, et des structures métalliques sur deux côtés du joint rompu correspondant à au moins un bras d'antenne respectivement ; le joint rompu est pourvu d'au moins un élément d'espacement, qui est utilisé pour isoler des bras d'antenne sur deux côtés, l'élément d'espacement étant électriquement conducteur ; l'élément d'espacement étant mis à la terre au moyen d'un réseau sélectif en fréquence prédéfinie, et est connecté au moyen d'un autre réseau sélectif en fréquence prédéfinie à une source d'alimentation, puis mis à la terre.
PCT/CN2018/084254 2017-05-31 2018-04-24 Structure multi-antenne de terminal et terminal mobile WO2018219071A1 (fr)

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CN201710400464.5A CN107257017B (zh) 2017-05-31 2017-05-31 一种终端多天线结构及移动终端

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CN205231244U (zh) * 2015-12-22 2016-05-11 南京信息工程大学 一种紧凑高隔离度三频八单元mimo手机天线
CN105703083A (zh) * 2016-04-26 2016-06-22 深圳前海智讯中联科技有限公司 一种多波束选择智能天线阵列及具有该天线阵列的系统
CN106229627A (zh) * 2016-09-30 2016-12-14 北京小米移动软件有限公司 一种天线组件和移动终端
CN107257017A (zh) * 2017-05-31 2017-10-17 维沃移动通信有限公司 一种终端多天线结构及移动终端

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