WO2020135145A1 - 天线结构及通信终端 - Google Patents

天线结构及通信终端 Download PDF

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Publication number
WO2020135145A1
WO2020135145A1 PCT/CN2019/125886 CN2019125886W WO2020135145A1 WO 2020135145 A1 WO2020135145 A1 WO 2020135145A1 CN 2019125886 W CN2019125886 W CN 2019125886W WO 2020135145 A1 WO2020135145 A1 WO 2020135145A1
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WIPO (PCT)
Prior art keywords
metal arm
resonance mode
antenna structure
antenna
switch circuit
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2019/125886
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English (en)
French (fr)
Inventor
蒋锐
王超
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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Publication date
Application filed by Vivo Mobile Communication Co Ltd filed Critical Vivo Mobile Communication Co Ltd
Publication of WO2020135145A1 publication Critical patent/WO2020135145A1/zh
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Ceased legal-status Critical Current

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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
    • H01Q1/12—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
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/10—Resonant antennas
    • H—ELECTRICITY
    • 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
    • H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
    • H01Q5/28—Arrangements for establishing polarisation or beam width over two or more different wavebands
    • 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
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation

Definitions

  • the embodiments of the present disclosure relate to the field of communication technologies, and in particular, to an antenna structure and a communication terminal.
  • MIMO multiple-input multiple-output
  • a plurality of fractures are formed on the metal body to form a plurality of antenna elements, thereby generating a plurality of resonance modes.
  • the above method needs to provide a plurality of fractures on the metal body, resulting in poor metal integration of the entire communication terminal.
  • An embodiment of the present disclosure provides an antenna structure and a communication terminal to solve the problem of poor metal integration of the entire communication terminal machine by providing multiple fractures on the metal body to generate multiple resonance modes.
  • an embodiment of the present disclosure provides an antenna structure that includes a first metal arm, a second metal arm, a first feed, and a second feed;
  • the first end of the first metal arm is grounded, the second end of the first metal arm is an open end, the first end of the second metal arm is an open end, and the second end of the second metal arm Grounding, the second end of the first metal arm and the first end of the second metal arm are coupled through a fracture;
  • the first feed source is electrically connected to the first feed point of the first metal arm;
  • the second feed source is electrically connected to the second feed point of the second metal arm;
  • the first metal arm is used to generate a first resonance mode and a second resonance mode
  • the second metal arm is used to generate a third resonance mode
  • an embodiment of the present disclosure also provides a communication terminal including the antenna structure provided by the embodiment of the present disclosure as described above.
  • the first metal arm and the second metal arm of the antenna structure are coupled through a fracture, the first metal arm is used to generate a first resonance mode and a second resonance mode, the second metal The arm is used to generate a third resonance mode. It can be seen that the antenna structure of the present disclosure can utilize one fracture to generate at least three resonance modes, thereby improving the performance of the antenna and improving the metal integrity of the entire communication terminal.
  • FIG. 1 is a schematic diagram of an antenna structure provided by an embodiment of the present disclosure
  • FIG. 2 is a second schematic diagram of an antenna structure provided by an embodiment of the present disclosure.
  • FIG. 3 is a third schematic diagram of an antenna structure provided by an embodiment of the present disclosure.
  • FIG. 4 is a fourth schematic diagram of an antenna structure provided by an embodiment of the present disclosure.
  • An embodiment of the present disclosure provides an antenna structure, which is applied to a communication terminal having a metal body.
  • the metal body may be a metal frame or a metal casing of the communication terminal, or may be a middle frame or other metal parts arranged in the communication terminal housing, which may be specifically determined according to the actual structure of the terminal, which is not limited in the embodiments of the present disclosure.
  • the metal body of the communication terminal is formed with a first metal arm and a second metal arm separated by a fracture, a first ground point, and a second ground point.
  • the fracture can also be expressed as an opening gap; the fracture can be filled with non-metallic materials such as air and plastic.
  • the metal body 10 has a break 11, a first ground point A, and a second ground point B.
  • the portion of the metal body 10 from the first ground point A to the fracture 11 forms the first metal arm 12; the portion of the metal body 10 from the second ground point B to the fracture 11 forms the second metal arm 13.
  • the ground point can also be called the next point.
  • the positions of the interruption port 11, the first grounding point A and the second grounding point B on the metal body 10 in FIG. 1 are only examples, and the specific setting positions can be set according to actual structural requirements. This is not limited.
  • the fracture 11 may be provided on the short side or the long side of the metal frame.
  • the antenna structure of the embodiment of the present disclosure may include a first metal arm 12, a second metal arm 13, a first feed 20 and a second feed 30.
  • the first end A of the first metal arm 12 (that is, the first ground point A on the metal body 10) is grounded, the second end C of the first metal arm 12 is an open end; the first end D of the second metal arm 13 For the open end, the second end B of the second metal arm 13 (that is, the second ground point B on the metal body) is grounded, the second end C of the first metal arm 12 and the first end D of the second metal arm 13 Coupling is set through fracture 11.
  • the first feed source 20 is electrically connected to the first feed point E of the first metal arm 12; the second feed source 30 is electrically connected to the second feed point F of the second metal arm 13.
  • the first metal arm is used to generate a first resonance mode and a second resonance mode
  • the second metal arm is used to generate a third resonance mode.
  • the first antenna radiator from the second end of the first metal arm to the first feed point generates a first resonant mode
  • the second end of the first metal arm from the second end to the first end The antenna radiator generates a second resonance mode
  • the third antenna radiator in the second metal arm from the first end to the second end generates a third resonance mode.
  • the AE segment of the first metal arm 12 can be equivalent to a small inductance to ground, therefore, the CE segment in the first metal arm 12 can be regarded as a first antenna radiator for generating the first resonance mode .
  • the AC segment of the first metal arm 12 can be regarded as a second antenna radiator for generating a second resonance mode. It can be seen that the first metal arm 12 can be used to generate at least two resonance modes.
  • the DB segment of the second metal arm 13 can be regarded as a third antenna radiator for generating a third resonance mode.
  • the FB section of the second metal arm 13 can be equivalent to a small inductance to ground, therefore, the DF section of the second metal arm 13 can be regarded as a fifth antenna radiator for generating the fifth resonance mode. It can be seen that the second metal arm 13 can be used to generate at least two resonance modes.
  • the frequency band that can be covered by the resonance mode is adapted to the electrical length of the antenna radiator that generates the resonance mode. Therefore, the lengths of the CE segment, the AC segment, the DB segment, and the DF segment can be set based on the frequency band covered by the resonance mode generated by the segment, which is not limited in the embodiments of the present disclosure.
  • the distance between the second feed point F and the second end B of the second metal arm 13 is smaller than the second feed point F and The distance between the second metal arms 13 near the second end D.
  • the second feed point F can be as close as possible to the second end B of the second metal arm 13, so that the radiation efficiency of the second metal arm can be improved.
  • the third resonance mode and the fifth resonance mode are similar, and the third resonance mode and the The frequency bands covered by the fifth resonance mode are basically the same. At this time, it can be considered that the second metal arm 13 generates only one resonance mode.
  • the first resonance mode may cover the WIFI5G frequency band
  • the second resonance mode may cover the WIFI2.4G frequency band
  • the third resonance mode may cover the global positioning system (GPS) frequency band.
  • GPS global positioning system
  • the CE length can be less than or equal to 5 mm, so that the radiation efficiency of the first antenna radiator can be improved.
  • the length of the CE may also be greater than 5 mm, which is not limited in the embodiments of the present disclosure.
  • the first resonance mode may cover B41 or B40
  • the second resonance mode may cover B1 or B39
  • the third resonance mode may cover B8.
  • the first metal arm and the second metal arm of the antenna structure are coupled through a fracture, the first metal arm is used to generate a first resonance mode and a second resonance mode, and the second metal arm Used to generate the third resonance mode. It can be seen that the antenna structure of the present disclosure can utilize one fracture to generate at least three resonance modes, thereby improving the performance of the antenna and improving the metal integrity of the entire communication terminal.
  • the antenna structure further includes a first matching network; the first end of the first matching network is electrically connected to the first connection point of the first metal arm or the second The second connection point of the metal arm, the second end of the first matching network is grounded.
  • the first end of the first matching network 40 is connected to the second connection point G of the second metal arm 13, and the second end of the first matching network is grounded.
  • the antenna structure shown in FIG. 2 can be mirrored. That is, the first end of the first matching network may be connected to the first connection point of the first metal arm.
  • the first matching network 40 can achieve the technical effect of high-frequency signal grounding, that is, the first matching network 40 has been turned on to the frequency band covered by the first resonance mode, which can effectively improve the first The radiation efficiency of the antenna radiator. If there is no first matching network 40, the third antenna radiator of the DB segment will significantly increase the electrical length of the first resonance mode, significantly reducing the radiation efficiency of the first antenna radiator, especially the first resonance mode coverage such as WIFI5G or Sub 6G and other high frequency bands.
  • the increase in the first matching network 40 may enable the antenna structure of the embodiment of the present disclosure to further generate a fourth resonance mode.
  • a fourth antenna radiator from the first end of the second metal arm to the second connection point is generated The fourth resonance mode.
  • the antenna structure can generate at least four resonance modes, thereby improving the coverage frequency range of the antenna structure and improving the antenna performance.
  • the DG segment in the second metal arm 13 can be regarded as a fourth antenna radiator for generating a fourth resonance Modal.
  • the frequency band that can be covered by the fourth resonance mode is adapted to the length of the DG segment and the matching value of the first matching network. Therefore, the length of the DG segment and the matching value of the first matching network can be set according to the frequency band covered by the fourth resonance mode, which is not limited in the embodiments of the present disclosure.
  • the fourth resonance mode may cover B3.
  • the specific value of the length of the fourth antenna radiator DG may be determined according to the specific structure of the first matching network 40, which is not limited in the embodiment of the present disclosure.
  • the length of DG may be about 20 mm, such as 15 mm, 20 mm, and 25 mm, and the fourth resonance mode may cover B3.
  • the first matching network 40 can be turned on for the frequency band covered by the first resonance mode. Therefore, in order to improve the radiation efficiency of the first antenna radiator of the CE segment, the fourth antenna is optionally radiated
  • the range of the length of the volume can be further adapted to the frequency band covered by the first resonance mode. That is, the length range of the DG segment in FIG. 2 is adapted to the frequency band covered by the first resonance mode.
  • the length of the fourth antenna radiator ranges from 0 to 7 mm;
  • the length of the fourth antenna radiator ranges from 0 to 25 mm.
  • the setting position of the second connection point G should be designed with the minimum impact on the third resonance mode as the design concept .
  • the length of the fourth antenna radiator is the maximum value of the length range of the fourth antenna radiator.
  • the second connection point G is as far away as possible from the first end D of the second metal arm 13 on the premise of ensuring the radiation efficiency of the first antenna radiator of the first matching network 40, so that the fourth matching network can be minimized 40 Impact on the third antenna radiator.
  • the radiation efficiency of the first antenna radiator can be greatly improved while ensuring that the radiation efficiency of the third antenna radiator is basically not lost, which can further improve the overall radiation efficiency of the antenna structure and improve the antenna performance.
  • the first matching network 40 may be composed of capacitors; or, the first matching network 40 may be composed of capacitors and inductors. Further, the first matching network 40 may be composed of capacitors and inductors connected in series or in parallel.
  • the first matching network 40 may only include a capacitor, and the value of the capacitor may be 0.5 picofarads or 4 picofarads; in another embodiment, the first matching network may be a complex matching composed of inductors and capacitors .
  • the capacitor may be a capacitive element or a spatial coupling capacitor, which is not limited in the embodiments of the present disclosure.
  • the antenna structure may further include:
  • a first switch circuit the first end of the first switch circuit is electrically connected to the third connection point of the first metal arm, the second end of the first switch circuit is grounded, and the third connection point is Any point on the first metal arm other than the first feed point; and/or,
  • a second switch circuit the first end of the second switch circuit is electrically connected to the fourth connection point of the second metal arm, the second end of the second switch circuit is grounded, and the fourth connection point is Any point on the second metal arm except the second feed point.
  • the antenna structure further includes a first matching network
  • the positions of the third connection point and the fourth connection point are connected to the first connection point or the second connection point of the first matching network connected to the metal arm Is set differently.
  • the first switch circuit can be used to expand the bandwidth of the resonant mode of the first metal arm
  • the second switch circuit can be used to expand the bandwidth of the resonant mode of the second metal arm, thereby improving the antenna structure. performance.
  • the third connection point is located between the first end of the first metal arm and the first feed point;
  • the antenna structure includes the second switching circuit and the first matching network, and the first end of the first matching network is electrically connected to the second connection point of the second metal arm, the fourth The connection point is located between the second connection point and the second end of the second metal arm.
  • the first switching circuit can be used to expand the second resonance mode of the second antenna radiator in the first metal arm,
  • the first resonance mode of an antenna radiator has an effect.
  • the second switching circuit does not affect the fourth resonance mode of the fourth antenna radiator of the second metal arm, and can be used to expand the bandwidth of the third resonance mode of the third antenna radiator of the second metal arm, thereby ensuring the antenna
  • the structure can generate at least four resonance modes, the performance of the antenna structure is improved.
  • the antenna structure shown in FIG. 3 further includes a first switching circuit 50 and a second switching circuit 60.
  • the first end of the first switch circuit 50 is electrically connected to the third connection point H of the first metal arm 12, and the second end of the second switch circuit 50 is grounded.
  • the first switching circuit 50 can effectively expand the bandwidth of the second resonance mode and can cover more frequency bands.
  • the first end of the second switch circuit 60 is electrically connected to the fourth connection point I of the second metal arm 13, and the second end of the second switch circuit 60 is grounded.
  • the second switch circuit 60 can effectively expand the bandwidth of the third resonance mode and can cover more frequency bands.
  • the installation positions of the third connection point H and the fourth connection point I in FIG. 3 are only examples, and the embodiments of the present disclosure do not limit the installation positions of the third connection point H and the fourth connection point I accordingly.
  • the third connection point H may be disposed between the CE of the first metal arm 12 and the fourth connection point I may be disposed between the DG or FB of the second metal arm 13.
  • the first switch circuit 50 may be composed of the first switch; or, the first switch circuit 50 may be composed of the first switch connected in series And the second matching network;
  • the second switch circuit 60 is composed of the second switch; or, the second switch circuit 60 is composed of the second switch and the third matching network connected in series.
  • the first switch circuit 50 may be composed of only the first switch
  • the second switch circuit 60 may be composed of only the second switch
  • the first switch circuit 50 may also connect a second matching network on the first switch, thereby improving the flexibility of the frequency band widened by the second resonance mode; the second switch circuit 60 may also be The third matching network is connected in series on the two switches, so that the flexibility of the frequency band expanded by the third resonance mode can be improved.
  • the first switch of the first switch circuit 50 is in the off state, the first switch circuit 50 is in the off state, and it will not affect the bandwidth covered by the second resonance mode; if the first switch circuit The first switch of 50 is in the on state, the second switch circuit 50 is in the on state, the AH segment of the first metal arm 12 is short-circuited, and the CH segment of the first metal arm 12 can be regarded as a second antenna radiator.
  • the second resonance mode so that the frequency band covered by the second resonance mode can be changed.
  • the second switch circuit 60 is in the off state, which will not affect the bandwidth covered by the third resonance mode;
  • the second switch circuit 60 is in the on state, the second switch circuit 60 is in the on state, the FB segment of the second metal arm 13 is short-circuited, and the DI segment of the second metal arm 13 can be regarded as a third antenna radiator, generating a third Resonance mode, so that the frequency band covered by the third resonance mode can be changed.
  • the antenna structure of Embodiment 1 may be as shown in FIG. 2.
  • the first resonance mode can cover the WIFI5G frequency band
  • the second resonance mode can cover the WIFI2.4G frequency band
  • the third resonance mode can cover the GPS frequency band
  • the first matching network 40 can use a 0.5 picofarad capacitor.
  • Embodiment 2 The first resonance mode can cover B41 or B40, the second resonance mode can cover B1 or B39, the third resonance mode can cover B8, and the first matching network 40 can use a 3-picofarad capacitor or capacitive inductance Complex matches formed.
  • the DG segment is a radiator, which can generate a fourth resonance mode and can be used to cover B3.
  • the antenna structure of Embodiment 2 may be as shown in FIG. 4.
  • the first switching circuit 50 and the second switching circuit 60 are added on the basis of the second embodiment.
  • the first switch circuit 50 can effectively expand the bandwidth of the second mode, and can cover more frequency bands.
  • the second switch circuit 60 can effectively expand the bandwidth of mode three, for example, multi-path matching can be used on the switch to expand B8 to B5 ⁇ B20 ⁇ B28, thereby effectively improving the frequency band coverage.
  • the first resonance mode generated by the CE section of the first metal arm 12 may cover the WIFI 5G frequency band
  • the second resonance mode generated by the CA section of the first metal arm 12 may cover WIFI 2 In the 4G frequency band
  • the third resonance mode generated by the DB section of the second metal arm 13 can cover the GPS frequency band.
  • the second matching network 40 can be used at high frequencies (there is no requirement for a matching value) to change the electrical length of the antenna, thereby improving radiation efficiency.
  • the DB length of the second metal arm 13 and the setting position of F are not limited, so as to cover the required antenna frequency band.
  • the second feed 30 is as close as possible to the second end B of the second metal arm 13, so that the radiation efficiency of the second metal arm 13 can be effectively improved.
  • the lengths of the CE segment of the first metal arm 12 and the DG segment of the second metal arm 13 need to be limited, and the length is affected by the electrical length of the frequency band to be covered, and the length needs to be limited to improve the radiation efficiency of the required coverage.
  • Bx is used in many places, and x is an Arabic numeral.
  • Band band, or band
  • B1 1920MHz-2170MHz (megahertz); B3: 1710MHz-1880MHz; B41: 2500MHz- 2690MHz; B8: 0.88GHz to 0.96GHz (Gigahertz); B39: 1.88GHz to 1.92GHz; B40: 2.3GHz to 2.4GHz; B20: 0.79GHz to 0.86GHz; B5: 0.824GHz to 0.894GHz.
  • WIFI5G refers to operating in the 5GHz radio wave frequency band, such as 5.15GHz ⁇ 5.85GHz
  • WIFI2.4G refers to operating in the 2.4GHz radio wave frequency band, such as 2.4GHz ⁇ 2.5GHz
  • Sub 6G refers to the radio wave frequency band operating below 6GHz, Such as 3.3GHz ⁇ 3.8GHz and 4.4GHz ⁇ 5GHz
  • the center frequency point of the GPS frequency band can be 1.575GHz.
  • An embodiment of the present disclosure also provides a communication terminal including the antenna structure as described above.
  • the antenna structure can refer to the above description, and will not be repeated here. It should be understood that, since the foregoing antenna structure is adopted, the terminal provided by the embodiments of the present disclosure has all the effects of the above antenna structure, and details are not described herein again.
  • the communication terminal may be a mobile phone, a tablet computer (Tablet Personal Computer), a personal digital assistant (PDA), a mobile Internet device (MID) or a wearable device (Wearable Device) Wait.
  • Tablet Personal Computer Tablet Personal Computer
  • PDA personal digital assistant
  • MID mobile Internet device
  • Wearable Device Wearable Device

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Abstract

本公开提供一种天线结构及通信终端，该天线结构包括第一金属臂、第二金属臂、第一馈源和第二馈源；所述第一金属臂的第一端接地，所述第一金属臂的第二端为开路端，所述第二金属臂的第一端为开路端，所述第二金属臂的第二端接地，所述第一金属臂的第二端和所述第二金属臂的第一端通过断口耦合设置；第一馈源与第一金属臂的第一馈点电连接；第二馈源与第二金属臂的第二馈点电连接；其中，所述第一金属臂用于产生第一谐振模态和第二谐振模态，所述第二金属臂用于产生第三谐振模态。

Description

天线结构及通信终端
相关申请的交叉引用
本申请主张在2018年12月28日在中国提交的中国专利申请号No.201811620922.7的优先权，其全部内容通过引用包含于此。
技术领域
本公开实施例涉及通信技术领域，尤其涉及一种天线结构及通信终端。
背景技术
随着科技的发展进步，通信技术得到了飞速发展和长足的进步，手机等通信终端的普及提高到了一个前所未有的高度，其功能也日趋完善。同时，通信终端的外观及质感也成了用户追求的方面，而金属壳体的通信终端，由于出色的金属质感得到了越来越多用户的青睐。
另外，随着多输入多输出(Multiple-Input Multiple-Output，MIMO)技术的需求越来越强烈，要求天线产生的谐振模态越来越多。相关技术中，通过采用在金属体上设置多个断口，形成多个天线单元，进而产生多个谐振模态。然而，上述方式需要在金属体上设置多个断口，导致通信终端整机的金属一体性较差。
发明内容
本公开实施例提供一种天线结构及通信终端，以解决通过在金属体上设置多个断口以产生多个谐振模态，导致通信终端整机的金属一体性较差的问题。
为解决上述问题，本公开是这样实现的：
第一方面，本公开实施例提供了一种天线结构，所述天线结构包括第一金属臂、第二金属臂、第一馈源和第二馈源；
所述第一金属臂的第一端接地，所述第一金属臂的第二端为开路端，所述第二金属臂的第一端为开路端，所述第二金属臂的第二端接地，所述第一 金属臂的第二端和所述第二金属臂的第一端通过断口耦合设置；
所述第一馈源与所述第一金属臂的第一馈点电连接；所述第二馈源与所述第二金属臂的第二馈点电连接；
其中，所述第一金属臂用于产生第一谐振模态和第二谐振模态，所述第二金属臂用于产生第三谐振模态。
第二方面，本公开实施例还提供一种通信终端，该通信终端包括如上所述的本公开实施例提供的天线结构。
在本公开实施例中，天线结构的第一金属臂和第二金属臂通过断口耦合设置，所述第一金属臂用于产生第一谐振模态和第二谐振模态，所述第二金属臂用于产生第三谐振模态。可见，本公开的天线结构可以利用一个断口，产生至少3个谐振模态，从而可以在提升天线性能的同时，提高通信终端整机的金属一体性。
附图说明
为了更清楚地说明本公开实施例的技术方案，下面将对本公开实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1是本公开实施例提供的天线结构的示意图之一；
图2是本公开实施例提供的天线结构的示意图之二；
图3是本公开实施例提供的天线结构的示意图之三；
图4是本公开实施例提供的天线结构的示意图之四。
具体实施方式
下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
本申请中的术语“第一”、“第二”等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。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。此外，本申请中使用“和/或”表示所连接对象的至少其中之一，例如A和/或B和/或C，表示包含单独A，单独B，单独C，以及A和B都存在，B和C都存在，A和C都存在，以及A、B和C都存在的7种情况。
本公开实施例提供一种天线结构，应用于具有金属体的通信终端。其中，金属体可以是通信终端的金属边框或者金属外壳，也可以是布置于通信终端壳体内的中框或者其他金属部件，具体可根据终端的实际结构决定，本公开实施例对此不作限定。
在本公开实施例中，通信终端的金属体通过断口、第一接地点和第二接地点分隔形成有第一金属臂和第二金属臂。在实际应用中，断口也可以表现为开口缝隙；断口中可以填充空气、塑料等非金属材料。
为方便理解，请参阅图1。如图1所示，金属体10上存在断口11、第一接地点A和第二接地点B。金属体10上第一接地点A至断口11的部分形成第一金属臂12；金属体10上第二接地点B至断口11的部分形成第二金属臂13。其中，接地点也可以称为下地点。
需要说明的是，图1中断口11、第一接地点A和第二接地点B在金属体10的上设置位置仅为示例，具体设置位置可根据实际结构需求设定，本公开实施例对此不作限定。示例性的，当金属体10为终端设备的金属边框时，断口11可以设置在金属边框的短边或长边。
如图1所示，本公开实施例的天线结构可以包括第一金属臂12、第二金属臂13、第一馈源20和第二馈源30。
第一金属臂12的第一端A(即为金属体10上的第一接地点A)接地，第一金属臂12的第二端C为开路端；第二金属臂13的第一端D为开路端，第二金属臂13的第二端B(即为金属体上的第二接地点B)接地，第一金属臂12的第二端C与第二金属臂13的第一端D通过断口11耦合设置。
第一馈源20与第一金属臂12的第一馈点E电连接；第二馈源30与第二 金属臂13的第二馈点F电连接。
在本公开实施例中，所述第一金属臂用于产生第一谐振模态和第二谐振模态，所述第二金属臂用于产生第三谐振模态。进一步地，所述第一金属臂中第二端到所述第一馈点的第一天线辐射体产生第一谐振模态；所述第一金属臂中第二端到第一端的第二天线辐射体产生第二谐振模态；所述第二金属臂中第一端到第二端的第三天线辐射体产生第三谐振模态。
在实际应用中，第一金属臂12的AE段可以等效于到地小电感，因此，第一金属臂12中的CE段可以视为第一天线辐射体，用于产生第一谐振模态。另外，第一金属臂12的AC段可以视为第二天线辐射体，用于产生第二谐振模态。可见，第一金属臂12至少可以用于产生两种谐振模态。
相应地，第二金属臂13的DB段可以视为第三天线辐射体，用于产生第三谐振模态。第二金属臂13的FB段可以等效于到地小电感，因此，第二金属臂的13的DF段可以视为第五天线辐射体，用于产生第五谐振模态。可见，第二金属臂13至少可以用于产生两种谐振模态。
需要说明的是，谐振模态可覆盖的频段适配于与产生该谐振模态的天线辐射体的电长度。因此，CE段、AC段、DB段和DF段的长度可以分别基于该段产生的谐振模态覆盖的频段设置，本公开实施例对此不作限定。
另外，在本公开实施例中，为了提高第二金属臂的辐射效率，可选的，第二馈点F与第二金属臂13的第二端B之间的间距小于第二馈点F与第二金属臂13中靠近第二端D之间的间距。也就是说，第二馈点F可以尽量靠近第二金属臂13的第二端B，从而可以提高第二金属臂的辐射效率。
而在实际应用中，在第二馈点F位于第二金属臂13中靠近第二端B的末端位置的情况下，第三谐振模态和第五谐振模态近似，第三谐振模态和第五谐振模态分别覆盖的频段基本相同。此时，可以视为第二金属臂13仅产生一种谐振模态。
一种实施方式中，第一谐振模态可以覆盖WIFI5G频段，第二谐振模态可以覆盖WIFI2.4G频段，第三谐振模态可以覆盖全球定位系统(global positioning system，GPS)频段。
在本实施方式中，CE长度可以小于或等于5毫米，从而可以提高第一天 线辐射体的辐射效率。当然，CE的长度也可以大于5毫米，本公开实施例对此不作限定。
另一种实施方式中，第一谐振模态可以覆盖B41或B40，第二谐振模态可以覆盖B1或B39，第三谐振模态可以覆盖B8。
在本公开实施例中，天线结构第一金属臂和第二金属臂通过断口耦合设置，所述第一金属臂用于产生第一谐振模态和第二谐振模态，所述第二金属臂用于产生第三谐振模态。可见，本公开的天线结构可以利用一个断口，产生至少3个谐振模态，从而可以在提升天线性能的同时，提高通信终端整机的金属一体性。
在本公开实施例中，可选的，所述天线结构还包括第一匹配网络；所述第一匹配网络的第一端电连接所述第一金属臂的第一连接点或所述第二金属臂的第二连接点，所述第一匹配网络的第二端接地。
为方便理解，请参阅图2。在图2中，第一匹配网络40的第一端连接第二金属臂13的第二连接点G，第一匹配网络的第二端接地。
需要说明的是，图2所示的天线结构可以镜像。也就是说，第一匹配网络的第一端可以连接第一金属臂的第一连接点。
在本公开实施例中，一方面，第一匹配网络40可以实现高频信号接地的技术效果，即第一匹配网络40对于第一谐振模态覆盖的频段已经导通下地，可以有效提高第一天线辐射体的辐射效率。如果没有第一匹配网络40，则DB段的第三天线辐射体会明显加长第一谐振模态的电长度，明显降低第一天线辐射体的辐射效率，特别是第一谐振模态覆盖如WIFI5G或Sub 6G等高频段时。
另一方面，第一匹配网络40的增加，可以使得本公开实施例的天线结构可以进一步产生第四谐振模态。可选的，所述第一匹配网络的第一端电连接所述第二连接点的情况下，所述第二金属臂中第一端到所述第二连接点的第四天线辐射体产生第四谐振模态。这样，天线结构至少可以产生四种谐振模态，从而可以提高天线结构的覆盖频段范围，提高天线性能。
如图2所示，在第一匹配网络40的第一端电连接第二连接点G的情况下，第二金属臂13中DG段可视为第四天线辐射体，用于产生第四谐振模态。
应理解的是，第四谐振模态可覆盖的频段适配于DG段的长度，以及第一匹配网络的匹配值。因此，DG段的长度，以及第一匹配网络的匹配值可以根据第四谐振模态覆盖的频段设置，本公开实施例对此不作限定。
可选的，在所述第四天线辐射体的长度取值范围为15毫米至30毫米的情况下，所述第四谐振模态可以覆盖B3。
具体实现时，第四天线辐射体DG的长度的具体取值，可以根据第一匹配网络40的具体结构确定，本公开实施例对此不作限定。示例性的，DG的长度可以在20毫米左右，如15毫米、20毫米、25毫米，第四谐振模态都可以覆盖B3。
由前述内容可知，第一匹配网络40可以对于第一谐振模态覆盖的频段导通下地，因此，为了提高CE段的第一天线辐射体的辐射效率，可选的，所述第四天线辐射体的长度取值范围进一步可以适配于所述第一谐振模态覆盖的频段。即图2中DG段的长度取值范围适配于第一谐振模态覆盖的频段。
进一步地，在所述第一谐振模态覆盖WIFI5G频段的情况下，所述第四天线辐射体的长度取值范围为0至7毫米；
在所述第一谐振模态覆盖B3、B1或B41的情况下，所述第四天线辐射体的长度取值范围为0至25毫米。
另外，考虑到第一匹配网络40的增加会对第三天线辐射体的辐射效率产生影响，因此，第二连接点G的设置位置，同时应以对第三谐振模态的影响最小为设计理念。
可选的，所述第四天线辐射体的长度取值为所述第四天线辐射体的长度取值范围的最大值。
也就是说，第二连接点G在保证第一匹配网络40第一天线辐射体的辐射效率的前提下，尽量远离第二金属臂13的第一端D，这样，可以尽量减少第四匹配网络40对第三天线辐射体的影响。从而可以在保证第三天线辐射体的辐射效率基本没有损失的情况下，大幅提升第一天线辐射体的辐射效率，进而可以提升天线结构的综合辐射效率，提高天线性能。
在实际应用中，可选的，第一匹配网络40可以由电容组成；或者，第一匹配网络40可以由电容和电感组成。进一步地，第一匹配网络40可以由电 容和电感串联或并联组成。
一种实施方式中，第一匹配网络40可以仅包括电容，且电容的取值可以为0.5皮法或4皮法；另一种实施方式中，第一匹配网络可以是电感电容组成的复杂匹配。
需要说明的是，在实际应用中，电容可以为电容元件，也可以为空间耦合电容，本公开实施例对此不作限定。
进一步地，所述天线结构还可以包括：
第一开关电路，所述第一开关电路的第一端与所述第一金属臂的第三连接点电连接，所述第一开关电路的第二端接地，所述第三连接点为所述第一金属臂上除所述第一馈点之外的任一点；和/或，
第二开关电路，所述第二开关电路的第一端与所述第二金属臂的第四连接点电连接，所述第二开关电路的第二端接地，所述第四连接点为所述第二金属臂上除所述第二馈点之外的任一点。
需要说明的是，当天线结构还包括第一匹配网络时，上述第三连接点和第四连接点的设置位置，与金属臂上连接有第一匹配网络的第一连接点或第二连接点的设置位置不同。
在本实施方式中，第一开关电路可以用于拓展第一金属臂的谐振模态的带宽，第二开关电路可以用于拓展第二金属臂的谐振模态的带宽，从而可以提升天线结构的性能。
可选的，在所述天线结构包括所述第一开关电路的情况下，所述第三连接点位于所述第一金属臂的第一端与所述第一馈点之间；
在所述天线结构包括所述第二开关电路和第一匹配网络，且所述第一匹配网络的第一端电连接所述第二金属臂的第二连接点的情况下，所述第四连接点位于所述第二连接点与所述第二金属臂的第二端之间。
这样，在所述天线结构包括所述第一开关电路的情况下，第一开关电路可以用于拓展第一金属臂中第二天线辐射体的第二谐振模态，不对第一金属臂中第一天线辐射体的第一谐振模态产生影响。
在所述天线结构包括所述第二开关电路和第一匹配网络，且所述第一匹配网络的第一端电连接所述第二金属臂的第二连接点的情况下，第二开关电 路不会对第二金属臂的第四天线辐射体的第四谐振模态产生影响，可以用于拓展第二金属臂的第三天线辐射体的第三谐振模态的带宽，从而可以在保证天线结构可以至少产生四种谐振模态的情况下，提升天线结构的性能。
为方便理解，请一并参阅图3。图3所示的天线结构还包括第一开关电路50和第二开关电路60。
其中，第一开关电路50的第一端与第一金属臂12的第三连接点H电连接，第二开关电路50的第二端接地。第一开关电路50可以有效拓展第二谐振模态的带宽，可以覆盖更多频段。
第二开关电路60的第一端与第二金属臂13的第四连接点I电连接，第二开关电路60的第二端接地。第二开关电路60可以有效拓展第三谐振模态的带宽，可以覆盖更多频段。
需要说明的是，图3中第三连接点H和第四连接点I的设置位置仅为示例，本公开实施例并不因此限制第三连接点H和第四连接点I的设置位置。在其他实施方式中，第三连接点H可以设置在第一金属臂12的CE之间，第四连接点I可以设置在第二金属臂13的DG或FB之间。
具体实现时，可选的，在所述天线结构包括第一开关电路50的情况下，第一开关电路50可以由第一开关组成；或者，第一开关电路50可以由串接的第一开关和第二匹配网络组成；
在所述天线结构包括第一开关电路60的情况下，第二开关电路60由第二开关组成；或者，第二开关电路60由串接的第二开关和第三匹配网络组成。
如图4所示，第一开关电路50可以仅由第一开关组成，第二开关电路60可以仅由第二开关组成。
但在其他实施方式中，第一开关电路50还可以在第一开关上串第二匹配网络，从而可以提高第二谐振模态所拓宽的频段的灵活度；第二开关电路60还可以在第二开关上串第三匹配网络，从而可以提高第三谐振模态所拓宽的频段的灵活度。
在图4中，若第一开关电路50的第一开关处于断开状态，则第一开关电路50处于断开状态，对第二谐振模态覆盖的带宽不会产生影响；若第一开关电路50的第一开关处于导通状态，则第二开关电路50处于导通状态，第一 金属臂12的AH段被短路，第一金属臂12的CH段可以视为第二天线辐射体，产生第二谐振模态，从而可以改变第二谐振模态覆盖的频段。
同理，若第二开关电路60的第二开关处于断开状态，则第二开关电路60处于断开状态，对第三谐振模态覆盖的带宽不会产生影响；若第二开关电路60的第二开关处于导通状态，则第二开关电路60处于导通状态，第二金属臂13的FB段被短路，第二金属臂13的DI段可以视为第三天线辐射体，产生第三谐振模态，从而可以改变第三谐振模态覆盖的频段。
需要说明的是，本公开实施例中介绍的多种可选的实施方式，彼此可以相互结合实现，也可以单独实现，对此本公开实施例不作限定。
实施例一的天线结构可以如图2所示。
实施方式一、第一谐振模态可以覆盖WIFI5G频段，第二谐振模态可以覆盖WIFI2.4G频段，第三谐振模态可以覆盖GPS频段；第一匹配网络40可以采用0.5皮法的电容。
实施方式二、第一谐振模态可以覆盖B41或B40，第二谐振模态可以覆盖B1或B39，第三谐振模态可以覆盖B8，第一匹配网络40可以采用3皮法的电容或者电容电感形成的复杂匹配。此时，控制第一匹配网络40的位置在离第二金属臂14的第一端20毫米左右时，DG段为辐射体，可以产生第四谐振模态，可以用于覆盖B3。
实施例二的天线结构可以如图4所示。
本实施例在实施方式二的基础上增加第一开关电路50和第二开关电路60。第一开关电路50可以有效拓展模态二的带宽，可以覆盖更多频段。第二开关电路60可以有效拓展模态三的带宽，例如可以在开关上使用多路匹配将B8拓展到B5\B20\B28，从而可以有效提高频段覆盖。
需要说明的是，在本公开实施例中，第一金属臂12的CE段产生的第一谐振模态可以覆盖WIFI5G频段，第一金属臂12的CA段产生的第二谐振模态可以覆盖WIFI2.4G频段，第二金属臂13的DB段产生的第三谐振模态可以覆盖GPS频段。
第二匹配网络40可以用于高频下地(对匹配值可以没有要求)，改变天线的电长度，从而提高辐射效率。
第二金属臂13的DB长度，以及F的设置位置不受限制，从而可以覆盖需求的天线频段。同时，第二馈源30尽量靠近第二金属臂13的第二端B，从而可以有效提高第二金属臂13的辐射效率。
第一金属臂12的CE段和第二金属臂13的DG段的长度需要限制，且其长度受需求覆盖的频段的电长度影响，需要针对性的限制长度，以提高需求覆盖的辐射效率。
另外，前述多处使用Bx，x为阿拉伯数字。例如B1、B3、B41等，B之全称是Band(频段，或称为频带)，表示国际标准规范的频带，例如B1：1920MHz-2170MHz(兆赫兹)；B3：1710MHz-1880MHz；B41：2500MHz-2690MHz；B8：0.88GHz～0.96GHz(吉赫兹)；B39：1.88GHz～1.92GHz；B40：2.3GHz～2.4GHz；B20：0.79GHz～0.86GHz；B5：0.824GHz～0.894GHz。
WIFI5G是指运行在5GHz无线电波频段，如5.15GHz～5.85GHz；WIFI2.4G是指运行在2.4GHz无线电波频段，如2.4GHz～2.5GHz；Sub 6G是指运行在6GHz以下的无线电波频段，如3.3GHz～3.8GHz和4.4GHz～5GHz；GPS频段的中心频点可以为1.575GHz。
本公开实施例还提供一种通信终端，该终端包括如上所述的天线结构。
其中，天线结构可以参考上述描述，此处不再赘述。应理解的是，由于采用了前述天线结构，因此本公开实施例提供的终端具有上述天线结构的所有效果，此处不再赘述。
在实际应用中，通信终端可以是手机、平板电脑(Tablet Personal Computer)、个人数字助理(personal digital assistant，简称PDA)、移动上网装置(Mobile Internet Device，MID)或可穿戴式设备(Wearable Device)等。
以上，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以权利要求的保护范围为准。

Claims (14)

  1. 一种天线结构，应用于通信终端，包括第一金属臂、第二金属臂、第一馈源和第二馈源；
    所述第一金属臂的第一端接地，所述第一金属臂的第二端为开路端，所述第二金属臂的第一端为开路端，所述第二金属臂的第二端接地，所述第一金属臂的第二端和所述第二金属臂的第一端通过断口耦合设置；
    所述第一馈源与所述第一金属臂的第一馈点电连接；所述第二馈源与所述第二金属臂的第二馈点电连接；
    其中，所述第一金属臂用于产生第一谐振模态和第二谐振模态，所述第二金属臂用于产生第三谐振模态。
  2. 根据权利要求1所述的天线结构，其中：
    所述第一金属臂中第二端到所述第一馈点的第一天线辐射体用于产生所述第一谐振模态；所述第一金属臂中第二端到第一端的第二天线辐射体用于产生所述第二谐振模态；所述第二金属臂中第一端到第二端的第三天线辐射体用于产生所述第三谐振模态。
  3. 根据权利要求1所述的天线结构，还包括第一匹配网络；所述第一匹配网络的第一端电连接所述第一金属臂的第一连接点或所述第二金属臂的第二连接点，所述第一匹配网络的第二端接地。
  4. 根据权利要求3所述的天线结构，其中：所述第一匹配网络由电容组成；或者，所述第一匹配网络由电容和电感组成。
  5. 根据权利要求3所述的天线结构，其中，在所述第一匹配网络的第一端电连接所述第二连接点的情况下，所述第二金属臂中第一端到所述第二连接点的第四天线辐射体用于产生第四谐振模态。
  6. 根据权利要求5所述的天线结构，其中，在所述第四天线辐射体的长度取值范围为15毫米至30毫米的情况下，所述第四谐振模态覆盖B3。
  7. 根据权利要求5所述的天线结构，其中，所述第四天线辐射体的长度取值范围适配于所述第一谐振模态覆盖的频段。
  8. 根据权利要求7所述的天线结构，其中：
    在所述第一谐振模态覆盖WIFI5G频段的情况下，所述第四天线辐射体的长度取值范围为0至7毫米；
    在所述第一谐振模态覆盖B3、B1或B41的情况下，所述第四天线辐射体的长度取值范围为0至25毫米。
  9. 根据权利要求7所述的天线结构，其中，所述第四天线辐射体的长度取值为所述长度取值范围中的最大值。
  10. 根据权利要求1所述的天线结构，其中，所述第二馈点与所述第二金属臂的第二端之间的间距小于所述第二馈点与所述第二金属臂的第一端之间的间距。
  11. 根据权利要求1所述的天线结构，还包括：
    第一开关电路，所述第一开关电路的第一端与所述第一金属臂的第三连接点电连接，所述第一开关电路的第二端接地，所述第三连接点为所述第一金属臂上除所述第一馈点之外的任一点；和/或，
    第二开关电路，所述第二开关电路的第一端与所述第二金属臂的第四连接点电连接，所述第二开关电路的第二端接地，所述第四连接点为所述第二金属臂上除所述第二馈点之外的任一点。
  12. 根据权利要求11所述的天线结构，其中：
    在所述天线结构包括所述第一开关电路的情况下，所述第三连接点位于所述第一金属臂的第一端与所述第一馈点之间；
    在所述天线结构包括所述第二开关电路和第一匹配网络，且所述第一匹配网络的第一端电连接所述第二金属臂的第二连接点的情况下，所述第四连接点位于所述第二连接点与所述第二金属臂的第二端之间。
  13. 根据权利要求11所述的天线结构，其中：
    在所述天线结构包括所述第一开关电路的情况下，所述第一开关电路由第一开关组成；或者，所述第一开关电路由串接的第一开关和第二匹配网络组成；
    在所述天线结构包括所述第二开关电路的情况下，所述第二开关电路由第二开关组成；或者，所述第二开关电路由串接的第二开关和第三匹配网络组成。
  14. 一种通信终端，包括如权利要求1至13中任一项所述的天线结构。
PCT/CN2019/125886 2018-12-28 2019-12-17 天线结构及通信终端 Ceased WO2020135145A1 (zh)

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