WO2015085594A1 - 一种发送器 - Google Patents

一种发送器 Download PDF

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Publication number
WO2015085594A1
WO2015085594A1 PCT/CN2013/089434 CN2013089434W WO2015085594A1 WO 2015085594 A1 WO2015085594 A1 WO 2015085594A1 CN 2013089434 W CN2013089434 W CN 2013089434W WO 2015085594 A1 WO2015085594 A1 WO 2015085594A1
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WO
WIPO (PCT)
Prior art keywords
branch
ground
antenna
long branch
long
Prior art date
Application number
PCT/CN2013/089434
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English (en)
French (fr)
Inventor
邹炎炎
于晓东
刘杰
Original Assignee
华为终端有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 华为终端有限公司 filed Critical 华为终端有限公司
Priority to PCT/CN2013/089434 priority Critical patent/WO2015085594A1/zh
Publication of WO2015085594A1 publication Critical patent/WO2015085594A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • 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
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/378—Combination of fed elements with parasitic elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a transmitter. Background technique
  • LTE Long Term Evolution
  • coupled antennas are used. Two antennas are coupled, one antenna is used to transmit high frequency signals, and the other antenna is used to transmit low frequency signals. High and low frequency signals are transmitted separately, which increases the bandwidth of the antenna to some extent, but the antenna that transmits the low frequency signal only corresponds to one low frequency. In the frequency band, the increased antenna bandwidth is very limited. Therefore, how to greatly increase the bandwidth of the antenna has become an urgent problem to be solved in the industry. Summary of the invention
  • the embodiment of the invention provides a transmitter, which can greatly increase the bandwidth of the antenna.
  • a transmitter comprising: an antenna and a matching circuit of the antenna; the antenna includes a short branch connecting an antenna feed point and a long branch coupled to the short branch, the short branch being used for transmitting The high frequency signal of the signal to be transmitted, the long branch is connected to the ground through the matching circuit, and the matching circuit is configured to perform matching adjustment on the long branch, so that the long branch corresponds to at least two low frequency bands.
  • the matching circuit includes a first capacitor or a first inductor, and a bypass switch connected in parallel with the first capacitor or the first inductor;
  • the long branch corresponds to the first low frequency band
  • the long branch corresponds to the second low frequency band.
  • the matching circuit includes a second capacitor and a second inductor in series with the second capacitor, where a value of the second capacitor is variable, When the second capacitance is adjusted to different values, the long branches correspond to different low frequency bands.
  • the long branch further includes: a first ground branch and a second ground branch, the matching circuit is a single pole double throw switch, the first ground branch and - a second grounding branch respectively connecting the two non-grounded terminals of the single pole double throw switch;
  • the long branch corresponds to the first low frequency band
  • the long branch corresponds to the second low frequency band.
  • the matching branch circuit performs matching adjustment on the long branch of the coupled antenna, so that the long branch corresponds to at least two low frequency bands, and the bandwidth of the antenna can be effectively increased.
  • FIG. 1 is a schematic diagram of a transmitter according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of another transmitter according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of still another transmitter according to an embodiment of the present invention. detailed description
  • the transmitter includes: a matching circuit of an antenna and an antenna, the antenna includes a short branch connecting the antenna feed point and a long branch coupled to the short branch, and the short branch is used to send the high frequency signal of the signal to be sent,
  • the long branch is used to send the low frequency signal of the signal to be transmitted, and the long branch passes through the matching circuit and - - Ground connection, the matching circuit is used for matching adjustment of long branches, so that long branches correspond to at least two low frequency bands.
  • the antenna is generally a coupled antenna
  • the short branch is connected to the antenna feed point
  • the long branch is coupled with the short branch
  • the signal to be transmitted is transmitted by wire to the antenna feed point through the internal circuit, thereby being transmitted to the short branch
  • the long branch receives the low frequency signal of the signal to be transmitted transmitted by the short branch coupling
  • the high frequency signal generally refers to a signal with a frequency greater than 1 GHz
  • the low frequency signal generally refers to a signal with a frequency of 0-l GHz.
  • the short branch and the long branch have different equivalent electrical lengths, and the matching circuit can adjust the equivalent electrical length of the long branch, so that the long branch corresponds to multiple low frequency bands, that is, the bandwidth of the antenna is effectively increased.
  • the antenna feed point is close to the ground, and the distance between the antenna feed point and the ground is less than or equal to the set distance.
  • the set distance is generally 5 mm, which is beneficial to the long branch of the antenna in the printed circuit of the wireless terminal product.
  • the board is grounded by a meandering curve to save space.
  • the long branch can correspond to a plurality of low frequency bands, when the low frequency band is switched, since the long branch and the short branch are coupled, there is no direct connection, and the low frequency switching has less influence on the high frequency signal.
  • FIG. 1 is a schematic diagram of a transmitter according to an embodiment of the present invention.
  • the transmitter includes a short branch 1 of the antenna, a long branch 2, and a short branch 1 connected to the antenna feed point F.
  • the short branch 1 is used to transmit high frequency signals, also called the feed branch
  • the long branch 2 is used to transmit low frequency signals, also called coupling branches, and the feed branches and coupling branches are connected by coupling.
  • the distance between the antenna feed point F and the ground terminal G is less than or equal to the set distance.
  • the set distance is generally 5 mm, which is advantageous for the long branch 2 to be grounded through the meandering curve on the printed circuit board of the wireless terminal product. To save space.
  • the matching circuit of the antenna is a circuit in which the component 3 is connected in parallel with the bypass switch 4. One end of the parallel circuit is connected to the ground terminal G of the long branch 2, and the other end of the parallel circuit is grounded 5.
  • Component 3 is an inductor or a capacitor. Different inductors or capacitors can adjust the long branch 2 to have different equivalent electrical lengths. By bypassing and closing the bypass switch 4, the low frequency signal can be divided into two frequency bands, the bypass switch 4 When disconnected, the inductor or capacitor is connected to the circuit, and the length of the antenna of the long branch 2 is changed.
  • the long branch 2 corresponds to one frequency band; when the bypass switch 4 is closed, the inductor or the capacitor is short-circuited and does not work, and the long branch 2 Corresponds to another frequency band.
  • the frequency band extends from the traditional 824-960MHZ to 699-960MHz.
  • the required frequency band that is, the bandwidth increases, the frequency of the existing coupled antenna is low frequency.
  • the segment can no longer meet the ever-increasing bandwidth.
  • 800MHz can be used as the separation point.
  • the antenna When 4 is disconnected, the antenna transmits a signal in the frequency band of 800-960 MHz.
  • the matching circuit of the embodiment of the invention is used, the matching circuit is single, and the bypass switch is used only in a part of the frequency band, and the introduced insertion loss is small, thereby improving the conversion efficiency of the antenna.
  • FIG. 2 is a schematic diagram of another transmitter according to an embodiment of the present invention.
  • the matching circuit of the transmitter is a series circuit of an inductor 6 and a capacitor 7, and one end of the series circuit is connected to the ground terminal G of the long branch 2, The other end of the series circuit is grounded 5.
  • the capacitor 7 is a tunable capacitor. By changing the value of the capacitor 7, the equivalent electrical length of the long branch 2 can be changed, so that the long branch 2 can correspond to a plurality of different low frequency bands.
  • FIG. 3 is a schematic diagram of still another transmitter according to an embodiment of the present invention.
  • the long branch 8 includes two grounding branches 9 and 10, the matching circuit of the long branch 8 comprising a single pole double throw switch 11, grounding branch 9 Connected to ground terminal G2, grounding branch 10 is connected to grounding terminal G1, one non-grounding end of single-pole double-throwing switch 11 is connected to grounding terminal G2, and the other non-grounding end of single-pole double-throwing switch 11 is connected with grounding terminal G1, single-pole double-throw switch Grounding terminal 11 is grounded 5.
  • grounding branch 10 and the grounding branch 9 have different equivalent electrical lengths, when the switch of the single-pole double-throwing switch 11 is turned to the grounding terminal G1, corresponding to one frequency band, when the switch of the single-pole double-throwing switch 11 is turned to the grounding end G2 At this time, it corresponds to another frequency band.
  • the transmitter provided by the embodiment of the present invention can be applied to a wireless terminal product such as a mobile phone or a notebook computer, and when a user carrying the wireless terminal product moves to a different country, the wireless terminal is used because different frequency bands are used in different countries.
  • the transmitter can receive the control signal of the base station and the like, adjust the matching circuit, thereby adjusting the low frequency band corresponding to the long branch of the transmitter, thereby adapting to the frequency band of the country, so that the wireless terminal product can be unblocked. Use.
  • the transmitter provided by the embodiment of the present invention performs matching adjustment on the long branch of the coupled antenna through the matching circuit, so that the long branch corresponds to at least two low frequency bands, and the bandwidth of the antenna can be effectively increased.

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  • Transmitters (AREA)

Abstract

一种发送器。其中的发送器包括：天线；所述天线包括连接天线馈点的短分支和与所述短分支耦合的长分支，所述短分支用于发送待发送信号的高频信号，所述长分支用于发送所述待发送信号的低频信号，所述长分支通过所述匹配电路与地连接，所述匹配电路用于对所述长分支进行匹配调节，使所述长分支对应至少两个低频频段。采用本发明实施例提供的一种发送器，可以有效地增加天线的带宽。

Description

一 一 一种发送器
技术领域
本发明涉及通信技术领域， 尤其涉及一种发送器。 背景技术
随着长期演进 (Long Term Evolution, LTE)技术的发展， 频段不断延伸， 在 不增加空间的前提下，无线终端类产品天线的设计面临着严重的带宽不够的问 题现有技术中采用耦合天线，两段天线进行耦合，一段天线用于发送高频信号， 另一段天线用于发送低频信号， 高低频信号进行分开发送， 一定程度上增加了 天线的带宽，但是发送低频信号的天线仅对应一个低频频段，增加的天线带宽 十分有限， 因此，如何较大地增加天线的带宽成为目前业界迫切需要解决的问 题。 发明内容
本发明实施例提供了一种发送器， 可以较大地增加天线的带宽。
一方面， 提供了一种发送器， 包括： 天线和所述天线的匹配电路； 所述天线包括连接天线馈点的短分支和与所述短分支耦合的长分支，所述 短分支用于发送待发送信号的高频信号，所述长分支通过所述匹配电路与地连 接， 所述匹配电路用于对所述长分支进行匹配调节，使所述长分支对应至少两 个低频频段。
在第一种可能的实现方式中，
所述匹配电路包括第一电容或第一电感、以及与所述第一电容或第一电感 并联的旁路开关；
所述旁路开关闭合时， 所述长分支对应第一低频频段；
所述旁路开关断开时， 所述长分支对应第二低频频段。
结合第一方面，在第二种可能的实现方式中， 所述匹配电路包括第二电容 和与所述第二电容串联的第二电感，所述第二电容的值是可变的， 所述第二电 容调节至不同的值时， 所述长分支对应不同的低频频段。
结合第一方面， 在第三种可能的实现方式中， 所述长分支还包括： 第一接 地分支和第二接地分支， 所述匹配电路为单刀双掷开关， 所述第一接地分支和 - - 第二接地分支分别连接所述单刀双掷开关的两个非接地端点；
当所述单刀双掷开关的刀拨到与所述第一接地分支连接的非接地端点时， 所述长分支对应第一低频频段；
当所述单刀双掷开关的刀拨到与所述第二接地分支连接的非接地端点时， 所述长分支对应第二低频频段。
结合第一方面或第一方面的第一种可能的实现方式或第一方面的第二种可能 的实现方式或第一方面的第三种可能的实现方式， 在第四种可能的实现方式 中， 所述天线馈点与所述地之间的距离小于或等于设定距离。 采用本发明实施例提供的一种发送器的技术方案，通过匹配电路对耦合天 线的长分支进行匹配调节，使长分支对应至少两个低频频段， 可以有效地增加 天线的带宽。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施 例中所需要使用的附图作筒单地介绍，显而易见地， 下面描述中的附图仅仅是 本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的 前提下， 还可以根据这些附图获得其他的附图。
图 1 为本发明实施例提供的一种发送器的示意图；
图 2为本发明实施例提供的另一种发送器的示意图；
图 3为本发明实施例提供的又一种发送器的示意图。 具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清 楚、 完整地描述， 显然， 所描述的实施例仅仅是本发明一部分实施例， 而不是 全部的实施例。基于本发明中的实施例， 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， 都属于本发明保护的范围。
在本发明实施例中， 发送器包括： 天线和天线的匹配电路， 该天线包括连 接天线馈点的短分支和与短分支耦合的长分支，短分支用于发送待发送信号的 高频信号， 长分支用于发送待发送信号的低频信号， 长分支通过该匹配电路与 - - 地连接， 该匹配电路用于对长分支进行匹配调节，使长分支对应至少两个低频 频段。
在本发明的实施例中， 天线一般为耦合天线， 短分支与天线馈点连接， 长 分支与短分支进行耦合，待发送信号通过内部电路有线传输到天线馈点，从而 传输至短分支， 然后， 长分支接收短分支耦合传输的待发送信号的低频信号， 高频信号一般指频率大于 1GHz的信号， 低频信号则一般是指频率为 0-lGHz 的信号。短分支和长分支具有不同的等效电长度，通过匹配电路可以对长分支 的等效电长度进行调节，从而使长分支对应多个低频频段， 即有效地增加了天 线的带宽。
优选地， 天线馈点与地接近， 天线馈点与地的距离小于或等于设定距离， 例如， 该设定距离一般为 5毫米， 这样有利于天线的长分支在无线终端类产品 的印刷电路板上通过迂回的曲线接地， 以节省空间。
本发明实施例中， 由于长分支可对应多个低频频段，在进行低频频段的切 换时， 由于长分支和短分支是耦合的， 没有直接连接， 低频切换时对高频信号 的影响较小。
下面通过示例的发送器中不同的匹配电路对天线的匹配调节过程进行详 细描述： 请参阅图 1 , 图 1为本发明实施例提供的一种发送器的示意图。 如图 1所示， 发送器包括天线的短分支 1、 长分支 2, 短分支 1接天线馈点 F。 短分 支 1用于发送高频信号， 也称为馈电分支， 长分支 2用于发送低频信号， 也称 为耦合分支，馈电分支与耦合分支通过耦合作用连接。 天线馈点 F与接地端 G 的距离小于或等于设定距离， 例如， 该设定距离一般为 5毫米， 这样有利于长 分支 2在无线终端类产品的印刷电路板上通过迂回的曲线接地， 以节省空间。
天线的匹配电路为元件 3与旁路开关 4并联的电路，该并联电路的一端与 长分支 2的接地端 G连接，该并联电路的另一端接地 5。元件 3为电感或电容， 不同的电感或电容可以调节长分支 2具有不同的等效电长度， 通过旁路开关 4 的断开和闭合， 可以将低频信号分为两个频段， 旁路开关 4断开时， 电感或电 容接入电路， 改变了长分支 2的天线电长度， 此时长分支 2对应一个频段； 旁 路开关 4闭合时， 电感或电容被短路， 不起作用， 此时长分支 2对应另外一个 频段。 例如， 随着 LTE技术的发展， 频段从传统的 824-960MHZ 延伸到 699-960MHz, 随着需求的频段即带宽的不同增加， 现有的耦合天线的低频频 - - 段已不能满足不断增大的带宽， 采用本发明实施例， 对于 699-960MHZ, 可以 以 800MHz为分隔点， 旁路开关 4闭合时， 天线发送 699-800MHZ这个频段的 信号， 旁路开关 4断开时， 天线发送 800-960MHZ这个频段的信号。 且使用本 发明实施例的匹配电路， 匹配电路筒单， 且旁路开关只在部分频段时使用， 引 入的插损小， 提高了天线的转换效率。
请参阅图 2, 图 2为本发明实施例提供的另一种发送器的示意图。 与图 1 所示的发送器不同的是， 在图 2中， 该发送器的匹配电路为一个电感 6和一个 电容 7的串联电路， 该串联电路的一端连接长分支 2的接地端 G, 该串联电路 的另一端接地 5。 电容 7为可调电容， 通过改变电容 7的值可以改变长分支 2 的等效电长度， 从而使长分支 2可以对应多个不同的低频频段。
请参阅图 3 , 图 3为本发明实施例提供的又一种发送器的示意图。 与图 1 和图 2所示的发送器不同的是， 在图 3中， 长分支 8包括两个接地分支 9和 10, 该长分支 8的匹配电路包含一个单刀双掷开关 11 , 接地分支 9连接接地 端 G2,接地分支 10连接接地端 G1 , 单刀双掷开关 11的一个非接地端与接地 端 G2连接， 单刀双掷开关 11的另一个非接地端与接地端 G1连接， 单刀双掷 开关 11的接地端接地 5。 由于接地分支 10与接地分支 9的等效电长度不同， 所以当单刀双掷开关 11的开关拨到接地端 G1时， 此时对应一个频段， 当单 刀双掷开关 11的开关拨到接地端 G2时， 此时对应另一个频段。
将本发明实施例提供的发送器可以运用在无线终端类产品例如手机、笔记 本电脑上，携带该无线终端类产品的用户移动到不同的国家时， 由于不同的国 家使用的频段不同， 当无线终端类产品接入网络进行漫游时，发送器可以接收 基站等的控制信号，调节匹配电路，从而调节发送器的长分支对应的低频频段， 从而适应该国的频段， 使得该无线终端类产品可以畅通地使用。
可见， 本发明实施例提供的发送器，通过匹配电路对耦合天线的长分支进 行匹配调节， 使长分支对应至少两个低频频段， 可以有效地增加天线的带宽。
在上述实施例中，对各个实施例的描述都各有侧重， 某个实施例中没有详 述的部分， 可以参见其他实施例的相关描述。
总之， 以上所述仅为本发明技术方案的较佳实施例而已， 并非用于限定本 发明的保护范围。凡在本发明的精神和原则之内，所作的任何修改、等同替换、 改进等， 均应包含在本发明的保护范围之内。

Claims

权 利 要 求
1、 一种发送器， 其特征在于， 包括： 天线和所述天线的匹配电路； 所述天线包括连接天线馈点的短分支和与所述短分支耦合的长分支，所述 短分支用于发送待发送信号的高频信号，所述长分支用于发送所述待发送信号 的低频信号， 所述长分支通过所述匹配电路与地连接， 所述匹配电路用于对所 述长分支进行匹配调节， 使所述长分支对应至少两个低频频段。
2、 如权利要求 1所述的发送器， 其特征在于， 所述匹配电路包括第一电 容或第一电感、 以及与所述第一电容或第一电感并联的旁路开关；
所述旁路开关闭合时， 所述长分支对应第一低频频段；
所述旁路开关断开时， 所述长分支对应第二低频频段。
3、 如权利要求 1所述的发送器， 其特征在于， 所述匹配电路包括第二电 容和与所述第二电容串联的第二电感， 所述第二电容的值是可变的， 所述第二 电容调节至不同的值时， 所述长分支对应不同的低频频段。
4、 如权利要求 1所述的发送器， 其特征在于， 所述长分支还包括： 第一 接地分支和第二接地分支， 所述匹配电路为单刀双掷开关， 所述第一接地分支 和第二接地分支分别连接所述单刀双掷开关的两个非接地端点；
当所述单刀双掷开关的刀拨到与所述第一接地分支连接的非接地端点时， 所述长分支对应第一低频频段；
当所述单刀双掷开关的刀拨到与所述第二接地分支连接的非接地端点时， 所述长分支对应第二低频频段。
5、 如权利要求 1-4任意一项所述的发送器， 其特征在于， 所述天线馈点 与所述地之间的距离小于或等于设定距离。
PCT/CN2013/089434 2013-12-13 2013-12-13 一种发送器 WO2015085594A1 (zh)

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CN107425875A (zh) * 2017-08-31 2017-12-01 广东欧珀移动通信有限公司 射频前端系统、移动终端及信号处理方法
CN109687121A (zh) * 2018-11-27 2019-04-26 惠州Tcl移动通信有限公司 移动终端及其易实现多频段覆盖的天线
CN110829002A (zh) * 2019-11-30 2020-02-21 Oppo广东移动通信有限公司 天线模组以及终端

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CN1714471A (zh) * 2002-11-18 2005-12-28 株式会社友华 多频段用天线
CN101953022A (zh) * 2006-11-16 2011-01-19 盖尔创尼克斯公司 小型化天线
CN102396110A (zh) * 2009-04-14 2012-03-28 Ace技术株式会社 具有端点短路的辐射体的使用耦合匹配的宽带天线

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CN1714471A (zh) * 2002-11-18 2005-12-28 株式会社友华 多频段用天线
CN101953022A (zh) * 2006-11-16 2011-01-19 盖尔创尼克斯公司 小型化天线
CN102396110A (zh) * 2009-04-14 2012-03-28 Ace技术株式会社 具有端点短路的辐射体的使用耦合匹配的宽带天线

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107425875A (zh) * 2017-08-31 2017-12-01 广东欧珀移动通信有限公司 射频前端系统、移动终端及信号处理方法
CN109687121A (zh) * 2018-11-27 2019-04-26 惠州Tcl移动通信有限公司 移动终端及其易实现多频段覆盖的天线
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