WO2021052127A1 - 天线结构及终端 - Google Patents

天线结构及终端 Download PDF

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Publication number
WO2021052127A1
WO2021052127A1 PCT/CN2020/111391 CN2020111391W WO2021052127A1 WO 2021052127 A1 WO2021052127 A1 WO 2021052127A1 CN 2020111391 W CN2020111391 W CN 2020111391W WO 2021052127 A1 WO2021052127 A1 WO 2021052127A1
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Prior art keywords
antenna
matching circuit
radiating arm
antenna matching
electrically connected
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PCT/CN2020/111391
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English (en)
French (fr)
Inventor
陈玉稳
高桂淞
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维沃移动通信有限公司
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Publication of WO2021052127A1 publication Critical patent/WO2021052127A1/zh

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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
    • H01Q1/48—Earthing means; Earth screens; Counterpoises
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • 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

Definitions

  • the present disclosure relates to the field of communication technology, and in particular to an antenna structure and a terminal.
  • the metal texture of the terminal has become the mainstream, and the proportion of the display screen is gradually increasing, and the design space of the antenna resonant arm is not getting smaller.
  • the shape of the antenna resonant arm is extremely simple. Unlike FPC (flexible printed circuit board) or LDS (laser forming technology) antennas, the radiating arm can have many variations.
  • the metal-shaped mobile terminal antenna is designed in the case of limited space and simple shape of the resonant arm.
  • a tuning switch By adding a tuning switch, it can switch between low frequency (700MHz, 850MHz, 900MHz) and high frequency (1710MHz-2690MHz), but In the limited environment of the related technology, I want to broaden the antenna bandwidth to support the 5G frequency band N78 (3300MHz-3800MHz)/N79 (4400MHz-5000MHz).
  • N78 3300MHz-3800MHz
  • N79 4400MHz-5000MHz
  • increasing the 5G frequency band in the medium and high frequency radiating arm can only be solved by increasing the number of switching paths. However, it is limited by the length of the medium and high frequency radiating arm.
  • the antenna radiation efficiency is adjusted to 3.5GHz or even 4.7GHz by matching, The bandwidth is poor, and it will also affect the performance of the intermediate frequency in the related technology.
  • the low frequency multiplication will also fall in the range of 3GHz-5GHz, and the isolation between the low frequency antenna and the medium and high frequency antenna will be very poor, which will also cause the performance of the 5G band to deteriorate.
  • the embodiments of the present disclosure provide an antenna structure and a terminal to solve the problem of poor antenna efficiency and bandwidth expanded by adding a switch circuit on the basis of the original antenna.
  • an antenna structure including:
  • a first radiating arm, the first radiating arm is electrically connected to a first ground terminal
  • a first feed source, a first antenna matching circuit, and a first inductor a first end of the first inductor is electrically connected to the first radiating arm, and a second end of the first inductor is matched with the first antenna
  • the circuit is electrically connected, and the first antenna matching circuit is electrically connected to the first feed source;
  • a second radiating arm and a second antenna matching circuit is connected between the second radiating arm and a second ground terminal, the second radiating arm is electrically connected to the first transmission line, and the first A transmission line is a transmission line connecting the first inductor and the first antenna matching circuit;
  • the length of the first radiating arm is greater than the length of the second radiating arm.
  • the embodiments of the present disclosure provide a terminal including the above-mentioned antenna structure.
  • a first inductance is provided between the first radiating arm and the first antenna matching circuit, and the second radiating arm is connected to the transmission line between the first inductance and the first antenna matching circuit, and the second radiating arm is A second antenna matching circuit is set between the arm and the ground terminal, so that the first radiating arm and the second radiating arm share a feed source, which not only realizes the expansion of the working frequency band of the second radiating arm from the original working frequency band of the first radiating arm , And the first inductance blocks the signal coupled to the first radiating arm from entering the second radiating arm, thereby blocking the influence of the signal coupled to the first radiating arm on the extended working frequency band of the second radiating arm, The problem of poor antenna efficiency and bandwidth expanded by adding a switch circuit on the basis of the original antenna is solved.
  • FIG. 1 shows one of the schematic diagrams of the circuit principle of the antenna structure of the embodiment of the present disclosure
  • FIG. 2 shows the second schematic diagram of the circuit principle of the antenna structure of the embodiment of the present disclosure
  • FIG. 3 shows the third schematic diagram of the circuit principle of the antenna structure of the embodiment of the present disclosure
  • the embodiments of the present disclosure provide an antenna structure, as shown in FIGS. 1 to 3, including:
  • the first radiating arm 2 is electrically connected to the first ground terminal
  • the first antenna matching circuit 9 is electrically connected, and the first antenna matching circuit 9 is electrically connected to the first feed source 1;
  • the second radiating arm 8 and the second antenna matching circuit 10 are connected between the second radiating arm 8 and a second ground terminal, and the second radiating arm 8 is electrically connected to the first transmission line.
  • the first transmission line is a transmission line connecting the first inductor 7 and the first antenna matching circuit 9;
  • the length of the first radiating arm 2 is greater than the length of the second radiating arm 8.
  • the first radiating arm 2 works in a first preset frequency band
  • the second radiating arm 8 works in a second preset frequency band
  • the first feed source 1 includes signals of the first preset frequency band and The signal of the second preset frequency band.
  • the length of the first radiating arm 2 is set according to the signal wavelength of the first preset frequency band
  • the second radiating arm 8 is set according to the signal wavelength of the second preset frequency band.
  • the length of the first radiating arm 2 may be 60 mm.
  • a first inductor 7 is provided between the first radiating arm 2 and the first antenna matching circuit 9, and is connected to the transmission line between the first inductor 7 and the first antenna matching circuit 9
  • the second radiating arm 8 is provided with a second antenna matching circuit 10 between the second radiating arm 8 and the ground terminal, so that the first radiating arm 2 and the second radiating arm 8 share one feed source, which not only realizes the original first radiation
  • the operating frequency band of the arm 2 extends the operating frequency band of the second radiating arm 8, and the first inductor 7 blocks the signal coupled to the first radiating arm 2 from entering the second radiating arm 8, thereby blocking the coupling to the first radiating arm 8.
  • the influence of the signal on the first radiating arm 2 on the working frequency band of the extended second radiating arm 8 solves the problem of poor antenna efficiency and bandwidth expanded by adding a switch circuit on the basis of the original antenna.
  • the second preset frequency band where the second radiating arm 8 works is expanded, and the coupling to the first radiating arm 2 is blocked.
  • the first preset frequency band is a low frequency band (700MHz-800MHz, 824MHz-894MHZ, 880MHz-960MHz), and the second preset frequency band is a 5G frequency band (N78, that is, 3300MHz-3800MHz)/N79, that is 4400MHz-5000MHz).
  • a second antenna radiating arm is added between the low-frequency feed source (that is, the first feed source 1) and the first inductor 7 to adjust the 5G frequency band resonance, and by connecting the first radiating arm 2 and The first inductance 7 is added between the first antenna matching circuit 9 so that when the signal of the high-frequency antenna is coupled from the first radiating arm 2 to the first inductance 7, the first inductance 7 blocks high-frequency signals and prevents high-frequency signals from entering The second radiating arm 8.
  • the antenna efficiency bandwidth is expanded, the 4G frequency band and the 5G frequency band are designed with a common antenna, and the isolation between the antennas is improved.
  • the inductance value of the first inductor 7 is greater than or equal to 10 nH.
  • the second radiating arm 8 and the first transmission line are electrically connected by elastic sheets or conductive foam. It can be understood that the connection between the second radiating arm 8 and the first transmission line is not limited to this.
  • the second radiating arm 8 is a planar F antenna, or a planar inverted F antenna, or a loop antenna, or a flexible printed circuit board antenna, or a laser forming antenna, or is composed of metal parts. It can be understood that the specific arrangement form of the second radiating arm 8 is not limited to this.
  • At least one third antenna matching circuit 3, and the at least one third antenna matching circuit 3 is electrically connected to the first radiating arm 2;
  • a first switch K1, the first switch K1 is connected between the at least one third antenna matching circuit 3 and the third ground terminal;
  • a path between the third antenna matching circuit 3 and the third ground terminal is turned on through the first switch K1 switch.
  • the first switch K1 conducts a different path between the third antenna matching circuit 3 and the third ground terminal, and the inductive or capacitive change of the first antenna radiating arm through the third antenna matching circuit 3 to the third ground terminal changes , So that the antenna resonance of the first preset frequency band can be adjusted.
  • the first preset frequency band is a low frequency band
  • a different third antenna matching circuit 3 can be turned on through the first switch K1 to resonate The working frequency band is increased to 824MHz-894MHZ or 880MHz-960MHz
  • the first antenna matching circuit 9 matches the 880MHz-960MHz frequency band
  • a different third antenna matching circuit 3 can be turned on through the first switch K1 to resonate
  • the working frequency band is pulled down to 824MHz-894MHZ or 700MHz-800MHz.
  • the third antenna matching circuit 3 is a capacitor
  • the resonance operating frequency band can be reduced
  • the third antenna matching circuit 3 is an inductor
  • At least one fourth antenna matching circuit 11 the target circuit is electrically connected to the second transmission line, and other antenna matching circuits other than the target circuit in the at least one fourth antenna matching circuit 11 are electrically connected to the first radiating arm 2 Connection, the target circuit is one of the at least one fourth antenna matching circuit 11, and the second transmission line is a transmission line connecting the second radiating arm 8 and the second antenna matching circuit 10;
  • a second switch K2, the second switch K2 is connected between the at least one fourth antenna matching circuit 11 and the fourth ground terminal;
  • one of the multiple fourth antenna matching circuits 11 connected to the second switch K2 may be connected to the transmission line between the second radiating arm 8 and the second antenna matching circuit 10, so that the first When the second switch K2 turns on or disconnects the path between the target circuit and the fourth ground terminal, the resonance frequency band of the second radiating arm 8 can be adjusted.
  • the second preset frequency band of the second radiating arm 8 is the 5G frequency band
  • the switching between the N78 frequency band and the N78 frequency band can be realized by turning on or disconnecting the path between the target circuit and the fourth ground terminal.
  • antenna matching circuits other than the target circuit among the plurality of fourth antenna matching circuits 11 are electrically connected to the first radiating arm 2, and any one of these antenna matching circuits can be turned on through the second switch K2. The adjustment of the resonance frequency band of the first radiating arm 2 is realized.
  • the antenna matching circuit for adjusting the resonance frequency band of the first radiating arm 2 and the antenna matching circuit for adjusting the resonance frequency band of the second radiating arm 8 are connected to a switch, that is, a switch is shared, which can save components and reduce Circuit layout space. That is, by multiplexing the tuning switch of the first radiating arm 2, the antenna can cover the frequency band without increasing the cost, and the antenna bandwidth is further expanded.
  • a fifth antenna matching circuit 12 the fifth antenna matching circuit 12 is electrically connected to a second transmission line, and the second transmission line is a transmission line connecting the second radiating arm 8 and the second antenna matching circuit 10;
  • a third switch K3, the third switch K3 is connected between the fifth antenna matching circuit 12 and the fifth ground terminal;
  • the path between the fifth antenna matching circuit 12 and the fifth ground terminal is turned on or off by the second switch K2.
  • an antenna matching circuit and a switch can be separately provided for the second radiating arm 8.
  • the resonance frequency band of the second radiating arm 8 can be adjusted.
  • the second preset frequency band of the second radiating arm 8 is the 5G frequency band
  • the path between the fifth antenna matching circuit 12 and the fifth ground terminal can be turned on or off to realize the connection between the N78 frequency band and the N78 frequency band. Switch.
  • a third radiating arm 5, the third radiating arm 5 is electrically connected to a sixth ground terminal;
  • the second feed source 4, the second feed source 4 and the third radiating arm 5 are electrically connected;
  • At least one sixth antenna matching circuit 6, and the at least one sixth antenna matching circuit 6 is electrically connected to the third radiating arm 5;
  • a fourth switch K4, the fourth switch K4 is connected between the at least one sixth antenna matching circuit 6 and the sixth ground terminal;
  • a path between the sixth antenna matching circuit 6 and the sixth ground terminal is turned on by the third switch K3 switch, so that the resonance frequency band of the third radiating arm 5 can be adjusted.
  • the third radiating arm 5 works in a third preset frequency band.
  • the length of the third radiating arm 5 is set according to the signal wavelength of the third preset frequency band.
  • the length of the third radiating arm 5 may be 22 mm.
  • the length of the third radiating arm 5 is less than the length of the first radiating arm 2 and greater than the length of the second radiating arm 8.
  • the third preset frequency band is a high frequency band (1710MHz-2690MHz).
  • the first radiating arm 2 is composed of a first metal component
  • the third radiating arm 5 is composed of a second metal component; wherein an opening is opened on a metal component to form the first metal component and The second metal part.
  • a metal piece with a non-metallic material filling the gap forms the first radiating arm 2 and the third radiating arm 5.
  • the distance between the first feed source 1 and the ground connection end of the first radiating arm 2 is less than a first preset value, and the distance between the first feed source 1 and the opening The distance is greater than the second preset value. That is, the first feed source 1 is close to the ground end of the first resonant arm and farther from the open end, thereby further improving the antenna performance.
  • the distance between the connection end of the third antenna matching circuit 3 and the first radiating arm 2 and the switch end is less than a third preset value, and is between the first feed source 1 and the third antenna matching circuit 3 The distance is greater than the fourth preset value. That is, the third antenna matching circuit 3 is arranged close to the open end and is farther away from the first feed source 1, thereby further improving the antenna performance.
  • the distance between the second feed 4 and the opening is less than a fifth preset value
  • the distance between the sixth antenna matching circuit 6 and the second feed 4 is less than a sixth preset value, that is, the second The feed source 4 is close to the open end, and the sixth antenna matching circuit 6 is arranged at the feeding position, thereby further improving the antenna performance.
  • the embodiment of the present disclosure also provides a terminal including the above-mentioned antenna structure.
  • a first inductor 7 is provided between the first radiating arm 2 and the first antenna matching circuit 9, and a second inductor 7 is connected to the transmission line between the first inductor 7 and the first antenna matching circuit 9
  • Radiation arm 8 a second antenna matching circuit 10 is arranged between the second radiating arm 8 and the ground terminal, so that the first radiating arm 2 and the second radiating arm 8 share a feed source, which not only realizes the original first radiating arm 2 Extend the working frequency band of the second radiating arm 8 on the working frequency band, and the first inductance 7 blocks the signal coupled to the first radiating arm 2 from entering the second radiating arm 8, thereby blocking the coupling to the first radiation
  • the influence of the signal on the arm 2 on the working frequency band of the expanded second radiating arm 8 solves the problem of poor antenna efficiency and bandwidth expanded by adding a switch circuit on the basis of the original antenna. Therefore, the embodiment of the present disclosure , You can work on more frequency bands.

Abstract

本公开提供了一种天线结构及终端，该天线结构包括：第一辐射臂，第一辐射臂与第一接地端电连接；第一馈源、第一天线匹配电路和第一电感，第一电感的第一端与第一辐射臂电连接，第一电感的第二端与第一天线匹配电路电连接，第一天线匹配电路与第一馈源电连接；第二辐射臂和第二天线匹配电路，第二天线匹配电路连接在第二辐射臂与第二接地端之间，第二辐射臂与第一传输线电连接，第一传输线为连接第一电感与第一天线匹配电路的传输线；其中，第一辐射臂的长度大于第二辐射臂的长度。

Description

天线结构及终端
相关申请的交叉引用
本申请主张在2019年9月19日在中国提交的中国专利申请号No.201910887204.4的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及通信技术领域，尤其涉及一种天线结构及终端。
背景技术
当前终端金属质感成为主流，显示屏占比也逐步增大，天线谐振臂的设计空间未越来越小。尤其是金属外形终端，天线谐振臂的形状极其简单，不同于FPC(柔性印刷电路板)或LDS(激光成型技术)天线，辐射臂可以有多种变化。
其中，金属外形移动终端天线设计在有限空间和简单形状的谐振臂情况之下，通过增加调谐开关的方式，可以分别切换出低频(700MHz、850MHz、900MHz)和高频(1710MHz-2690MHz)，但在相关技术中有限的整机环境下想再拓宽天线带宽，使其支持到5G频段N78(3300MHz-3800MHz)/N79(4400MHz-5000MHz)，在通过开关调谐出高频分支的情况下，其调谐出的效率和带宽均较差，不能满足用户使用需求。
例如，在中高频辐射臂增加5G频段，只能通过增加开关切换通路数量的方式解决，但是受限于中高频本身辐射臂的长度，通过匹配调节到3.5GHz甚至4.7GHz时，天线辐射效率和带宽均较差，还会影响到相关技术中中频的性能。同时低频的倍频也会落在3GHz-5GHz这个范围，低频天线和中高频天线的隔离度会很差，也会导致5G频段性能变差。
发明内容
本公开的实施例提供了一种天线结构及终端，以解决在原有天线基础上通过增加开关切换电路的方式拓展的天线效率和带宽较差的问题。
第一方面，本公开的实施例提供了一种天线结构，包括：
第一辐射臂，所述第一辐射臂与第一接地端电连接；
第一馈源、第一天线匹配电路和第一电感，所述第一电感的第一端与所述第一辐射臂电连接，所述第一电感的第二端与所述第一天线匹配电路电连接，所述第一天线匹配电路与所述第一馈源电连接；
第二辐射臂和第二天线匹配电路，所述第二天线匹配电路连接在所述第二辐射臂与第二接地端之间，所述第二辐射臂与第一传输线电连接，所述第一传输线为连接所述第一电感与所述第一天线匹配电路的传输线；
其中，所述第一辐射臂的长度大于第二辐射臂的长度。
第二方面，本公开的实施例提供了一种终端，包括上述所述的天线结构。
本公开实施例的有益效果是：
本公开的实施例，在第一辐射臂和第一天线匹配电路之间设置第一电感，并在第一电感与第一天线匹配电路之间的传输线上连接第二辐射臂，在第二辐射臂与接地端之间设置第二天线匹配电路，使得第一辐射臂和第二辐射臂共用一个馈源，不仅实现了在原有第一辐射臂的工作频段上拓展出第二辐射臂的工作频段，而且通过第一电感阻隔了耦合到第一辐射臂上的信号进入到第二辐射臂上，从而阻隔了耦合到第一辐射臂上的信号对拓展的第二辐射臂的工作频段的影响，解决了在原有天线基础上通过增加开关切换电路的方式拓展的天线效率和带宽较差的问题。
附图说明
图1表示本公开实施例的天线结构的电路原理示意图之一；
图2表示本公开实施例的天线结构的电路原理示意图之二；
图3表示本公开实施例的天线结构的电路原理示意图之三；
其中图中：1、第一馈源；2、第一辐射臂；7、第一电感；9、第一天线匹配电路；8、第二辐射臂；10、第二天线匹配电路；5、第三辐射臂；4、第二馈源；3、第三天线匹配电路；11、第四天线匹配电路；12、第五天线匹配电路；6、第六天线匹配电路；K1、第一切换开关；K2、第二切换开关；K3、第三切换开关；K4、第四切换开关。
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。
本公开的实施例提供了一种天线结构，如图1～3所示，包括：
第一辐射臂2，所述第一辐射臂2与第一接地端电连接；
第一馈源1、第一天线匹配电路9和第一电感7，所述第一电感7的第一端与所述第一辐射臂2电连接，所述第一电感7的第二端与所述第一天线匹配电路9电连接，所述第一天线匹配电路9与所述第一馈源1电连接；
第二辐射臂8和第二天线匹配电路10，所述第二天线匹配电路10连接在所述第二辐射臂8与第二接地端之间，所述第二辐射臂8与第一传输线电连接，所述第一传输线为连接所述第一电感7与所述第一天线匹配电路9的传输线；
其中，所述第一辐射臂2的长度大于第二辐射臂8的长度。
另外，所述第一辐射臂2工作于第一预设频段，所述第二辐射臂8工作于第二预设频段，所述第一馈源1包括所述第一预设频段的信号和所述第二预设频段的信号。所述第一辐射臂2的长度是根据所述第一预设频段的信号波长设置的，所述第二辐射臂8是根据所述第二预设频段的信号波长设置的。例如，第一辐射臂2的长度可以为60mm。
由上述可知，本公开的实施例，在第一辐射臂2和第一天线匹配电路9之间设置第一电感7，并在第一电感7与第一天线匹配电路9之间的传输线上连接第二辐射臂8，在第二辐射臂8与接地端之间设置第二天线匹配电路10，使得第一辐射臂2和第二辐射臂8共用一个馈源，不仅实现了在原有第一辐射臂2的工作频段上拓展出第二辐射臂8的工作频段，而且通过第一电感7阻隔了耦合到第一辐射臂2上的信号进入到第二辐射臂8上，从而阻隔了耦合到第一辐射臂2上的信号对拓展的第二辐射臂8的工作频段的影响，解决了在原有天线基础上通过增加开关切换电路的方式拓展的天线效率和带 宽较差的问题。
即本公开的实施例，在原有第一辐射臂2工作的第一预设频段的基础上，拓展了第二辐射臂8工作的第二预设频段，且阻隔了耦合到第一辐射臂2上的信号对第二预设频段的信号的干扰。
此外，还可以通过增加第二辐射臂8与第二接地端之间的距离，即通过增加第二辐射臂8的天线净空，来提高天线带宽和效率。
可选地，所述第一预设频段为低频段(700MHz-800MHz、824MHz-894MHZ、880MHz-960MHz)，所述第二预设频段为5G频段(N78，即3300MHz-3800MHz)/N79，即4400MHz-5000MHz)。此种情况下，本公开的实施例，在低频馈源(即第一馈源1)和第一电感7之间增加第二天线辐射臂调节5G频段谐振，并且通过在第一辐射臂2和第一天线匹配电路9之间增加第一电感7，使得高频天线的信号从第一辐射臂2耦合到第一电感7处时，第一电感7对高频信号阻隔，杜绝高频信号进入第二辐射臂8。在有限的环境下拓展了天线效率带宽，实现了4G频段和5G频段共天线设计，改善了天线之间的隔离度。
可选地，所述第一电感7的电感值大于或等于10nH。
可选地，所述第二辐射臂8与所述第一传输线通过弹片或者导电泡棉电连接。其中，可以理解的是，第二辐射臂8与第一传输线之间的连接方式并不局限于此。
可选地，所述第二辐射臂8为平面F天线、或者平面倒F天线、或者环形天线、或者柔性印刷电路板天线、或者激光成型天线、或者由金属件构成。其中，可以理解的是，对于第二辐射臂8的具体设置形式，并不局限于此。
可选地，如图1所示，还包括：
至少一路第三天线匹配电路3，所述至少一路第三天线匹配电路3分别与所述第一辐射臂2电连接；
第一切换开关K1，所述第一切换开关K1连接在所述至少一路第三天线匹配电路3与第三接地端之间；
通过所述第一切换开关K1开关导通一路所述第三天线匹配电路3与所述第三接地端之间的通路。
其中，第一切换开关K1导通不同的第三天线匹配电路3与第三接地端之间的通路，第一天线辐射臂经过第三天线匹配电路3到第三接地端的感性或容性发生变化，从而可以调节第一预设频段的天线谐振。
具体地，若第一预设频段低频频段，则若第一天线匹配电路9与700MHz-800MHz频段相匹配，那么，可以通过第一切换开关K1导通不同的第三天线匹配电路3，将谐振工作频带升高为824MHz-894MHZ或者880MHz-960MHz；若第一天线匹配电路9与880MHz-960MHz频段相匹配，那么，可以通过第一切换开关K1导通不同的第三天线匹配电路3，将谐振工作频带拉低为824MHz-894MHZ或者700MHz-800MHz。其中，当第三天线匹配电路3为电容时，则可实现谐振工作频带的拉低，当第三天线匹配电路3为电感时，则可实现谐振工作频带的升高。
可选地，如图2所示，还包括：
至少一路第四天线匹配电路11，目标电路与第二传输线电连接，所述至少一路第四天线匹配电路11中除去所述目标电路之外的其他天线匹配电路与所述第一辐射臂2电连接，所述目标电路为所述至少一路第四天线匹配电路11中的其中一路，所述第二传输线为连接所述第二辐射臂8与所述第二天线匹配电路10之间的传输线；
第二切换开关K2，所述第二切换开关K2连接在所述至少一路第四天线匹配电路11与第四接地端之间；
其中，通过所述第二切换开关K2开关导通一路所述第四天线匹配电路11与所述第四接地端之间的通路。
即与第二切换开关K2相连接的多个第四天线匹配电路11中，可以有一路(即目标电路)连接到第二辐射臂8与第二天线匹配电路10之间的传输线上，使得第二切换开关K2导通或者断开目标电路与第四接地端之间的通路时，可以调节第二辐射臂8的谐振频带。例如，第二辐射臂8的第二预设频段为5G频段时，可以通过导通或者断开目标电路与第四接地端之间的通路，实现N78频段与N78频段之间的切换。
另外，多个第四天线匹配电路11中除去目标电路之外的其他天线匹配电路，与第一辐射臂2电连接，则可以通过第二切换开关K2导通这些天线匹 配电路中的任一路，实现对第一辐射臂2谐振频带的调节。
此外，将调节第一辐射臂2谐振频带的天线匹配电路和调节第二辐射臂8谐振频带的天线匹配电路，连接到一个切换开关上，即共用一个切换开关，可以节省元器件，并且减小电路的布局空间。即通过复用第一辐射臂2的调谐开关，在不增加成本的情况下，提高了天线可覆盖频段，进一步拓展天线带宽。
可选地，如图3所示，还包括：
第五天线匹配电路12，所述第五天线匹配电路12与第二传输线电连接，所述第二传输线为连接所述第二辐射臂8与所述第二天线匹配电路10之间的传输线；
第三切换开关K3，所述第三切换开关K3连接在所述第五天线匹配电路12与第五接地端之间；
其中，通过所述第二切换开关K2开关导通或者断开所述第五天线匹配电路12与所述第五接地端之间的通路。
即可以单独为第二辐射臂8设置一路天线匹配电路和切换开关。其中，第三切换开关K3导通或者断开所述第五天线匹配电路12与第五接地端之间的通路时，可以调节第二辐射臂8的谐振频带。例如，第二辐射臂8的第二预设频段为5G频段时，可以通过导通或者断开第五天线匹配电路12与第五接地端之间的通路，实现N78频段与N78频段之间的切换。
可选地，如图1～3所示，还包括：
第三辐射臂5，所述第三辐射臂5与第六接地端电连接；
第二馈源4、所述第二馈源4与所述第三辐射臂5电连接；
至少一路第六天线匹配电路6，所述至少一路第六天线匹配电路6分别与所述第三辐射臂5电连接；
第四切换开关K4，所述第四切换开关K4连接在所述至少一路第六天线匹配电路6与第六接地端之间；
其中，通过所述第三切换开关K3开关导通一路所述第六天线匹配电路6与所述第六接地端之间的通路，从而可以调节第三辐射臂5的谐振频带。
另外，所述第三辐射臂5工作于第三预设频段。所述第三辐射臂5的长 度是根据所述第三预设频段的信号波长设置的。例如，第三辐射臂5的长度可以为22毫米。可选地，所述第三辐射臂5的长度小于所述第一辐射臂2的长度，大于所述第二辐射臂8的长度。
可选地，所述第三预设频段为高频段(1710MHz-2690MHz)。
可选地，所述第一辐射臂2由第一金属部件构成，所述第三辐射臂5由第二金属部件构成；其中，一金属件上开设有一开口，形成所述第一金属部件和所述第二金属部件。例如图1～图3所示，具有非金属材料填充缝隙的金属件，形成了第一辐射臂2和第三辐射臂5。
可选地，所述第一馈源1与所述第一辐射臂2的接地的连接端之间的距离小于第一预设值，且所述第一馈源1与所述开口之间的距离大于第二预设值。即第一馈源1靠近第一谐振臂的接地端，与开口端较远，从而进一步提升天线性能。
可选地，所述第三天线匹配电路3与所述第一辐射臂2的连接端与所述开关端之间的距离小于第三预设值，且与所述第一馈源1之间的距离大于第四预设值。即第三天线匹配电路3设置在靠近开口端，与第一馈源1之间的距离较远，从而进一步提升天线性能。
可选地，第二馈源4与所述开口之间的距离小于第五预设值，第六天线匹配电路6与第二馈源4之间的距离小于第六预设值，即第二馈源4靠近开口端，第六天线匹配电路6设置在馈电位置，从而进一步提升天线性能。
本公开的实施例还提供了一种终端，包括上述所述的天线结构。
其中上述所述的天线结构，在第一辐射臂2和第一天线匹配电路9之间设置第一电感7，并在第一电感7与第一天线匹配电路9之间的传输线上连接第二辐射臂8，在第二辐射臂8与接地端之间设置第二天线匹配电路10，使得第一辐射臂2和第二辐射臂8共用一个馈源，不仅实现了在原有第一辐射臂2的工作频段上拓展出第二辐射臂8的工作频段，而且通过第一电感7阻隔了耦合到第一辐射臂2上的信号进入到第二辐射臂8上，从而阻隔了耦合到第一辐射臂2上的信号对拓展的第二辐射臂8的工作频段的影响，解决了在原有天线基础上通过增加开关切换电路的方式拓展的天线效率和带宽较差的问题，因此，本公开实施例的终端，则可以工作在更多频段上。
以上所述是本公开的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本公开所述原理的前提下，还可以作出若干改进和润饰，这些改进和润饰也应视为本公开的保护范围。

Claims (10)

  1. 一种天线结构，包括：
    第一辐射臂，所述第一辐射臂与第一接地端电连接；
    第一馈源、第一天线匹配电路和第一电感，所述第一电感的第一端与所述第一辐射臂电连接，所述第一电感的第二端与所述第一天线匹配电路电连接，所述第一天线匹配电路与所述第一馈源电连接；
    第二辐射臂和第二天线匹配电路，所述第二天线匹配电路连接在所述第二辐射臂与第二接地端之间，所述第二辐射臂与第一传输线电连接，所述第一传输线为连接所述第一电感与所述第一天线匹配电路的传输线；
    其中，所述第一辐射臂的长度大于第二辐射臂的长度。
  2. 根据权利要求1所述的天线结构，还包括：
    至少一路第三天线匹配电路，所述至少一路第三天线匹配电路分别与所述第一辐射臂电连接；
    第一切换开关，所述第一切换开关连接在所述至少一路第三天线匹配电路与第三接地端之间；
    其中，通过所述第一切换开关开关导通一路所述第三天线匹配电路与所述第三接地端之间的通路。
  3. 根据权利要求1所述的天线结构，还包括：
    至少一路第四天线匹配电路，目标电路与第二传输线电连接，所述至少一路第四天线匹配电路中除去所述目标电路之外的其他天线匹配电路与所述第一辐射臂电连接，所述目标电路为所述至少一路第四天线匹配电路中的其中一路，所述第二传输线为连接所述第二辐射臂与所述第二天线匹配电路之间的传输线；
    第二切换开关，所述第二切换开关连接在所述至少一路第四天线匹配电路与第四接地端之间；
    其中，通过所述第二切换开关开关导通一路所述第四天线匹配电路与所述第四接地端之间的通路。
  4. 根据权利要求1所述的天线结构，还包括：
    第五天线匹配电路，所述第五天线匹配电路与第二传输线电连接，所述第二传输线为连接所述第二辐射臂与所述第二天线匹配电路之间的传输线；
    第三切换开关，所述第三切换开关连接在所述第五天线匹配电路与第五接地端之间；
    其中，通过所述第二切换开关开关导通或者断开所述第五天线匹配电路与所述第五接地端之间的通路。
  5. 根据权利要求1所述的天线结构，还包括：
    第三辐射臂，所述第三辐射臂与第六接地端电连接；
    第二馈源、所述第二馈源与所述第三辐射臂电连接；
    至少一路第六天线匹配电路，所述至少一路第六天线匹配电路分别与所述第三辐射臂电连接；
    第四切换开关，所述第四切换开关连接在所述至少一路第六天线匹配电路与第六接地端之间；
    其中，通过所述第三切换开关开关导通一路所述第六天线匹配电路与所述第六接地端之间的通路。
  6. 根据权利要求5所述的天线结构，其中，所述第一辐射臂由第一金属部件构成，所述第三辐射臂由第二金属部件构成；
    其中，一金属件上开设有一开口，形成所述第一金属部件和所述第二金属部件。
  7. 根据权利要求1所述的天线结构，其中，所述第一电感的电感值大于或等于10nH。
  8. 根据权利要求1所述的天线结构，其中，所述第二辐射臂与所述第一传输线通过弹片或者导电泡棉电连接。
  9. 根据权利要求1所述的天线结构，其中，所述第二辐射臂为平面F天线、或者平面倒F天线、或者环形天线、或者柔性印刷电路板天线、或者激光成型天线、或者由金属件构成。
  10. 一种终端，包括如权利要求1至9任一项所述的天线结构。
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CN110649373A (zh) * 2019-09-19 2020-01-03 维沃移动通信有限公司 一种天线结构及终端

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