WO2020024657A1 - 天线系统及移动终端 - Google Patents

天线系统及移动终端 Download PDF

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Publication number
WO2020024657A1
WO2020024657A1 PCT/CN2019/087459 CN2019087459W WO2020024657A1 WO 2020024657 A1 WO2020024657 A1 WO 2020024657A1 CN 2019087459 W CN2019087459 W CN 2019087459W WO 2020024657 A1 WO2020024657 A1 WO 2020024657A1
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Prior art keywords
antenna system
radiation
present
adjustable capacitor
circuit board
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PCT/CN2019/087459
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English (en)
French (fr)
Inventor
朱玉飞
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AAC Technologies Holdings Shenzhen Co Ltd
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AAC Acoustic Technologies Shenzhen Co Ltd
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    • 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
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • 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
    • H01Q1/44—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
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
    • 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

Definitions

  • the present invention relates to the technical field of antennas, and in particular, to an antenna system and a mobile terminal.
  • wireless communication equipment there is always a device that radiates electromagnetic energy to space and receives electromagnetic energy from space.
  • This device is an antenna.
  • the function of the antenna is to transmit digital signals or analog signals modulated to the radio frequency to the space wireless channel, or to receive digital or analog signals modulated to the radio frequency from the space wireless channel.
  • the metal frame architecture is the mainstream solution in the design of mobile phone structures, which can provide better protection, aesthetics, thermal diffusion, and user experience.
  • the object of the present invention is to provide an antenna system which has good radiation performance.
  • An antenna system includes a metal case, a circuit board, and an antenna unit.
  • the circuit board is located in the metal case, and the circuit board includes a radio frequency feed and an adjustable capacitor.
  • the radiation frame includes a radiating frame and a grounded back shell spaced apart from the radiating frame. Two ends of the radiating frame and the grounded back shell respectively form a fracture.
  • the antenna unit is connected to the radio frequency feed and is A radiation frame is coupled and the adjustable capacitor is connected to the radiation frame to change the electrical length of the antenna system by switching different capacitance values.
  • the radiation frequency of the antenna system covers 790-960MHz and 1710-2690MHz.
  • the capacitance of the adjustable capacitor ranges from 0.75 to 3.1 pF.
  • the radiation frame is connected to the grounded back shell through a connecting rib.
  • the present invention also provides a mobile terminal including the antenna system.
  • an antenna system provided by the present invention by setting an adjustable capacitor as a tuner of the antenna system, not only realizes the antenna system radiation frequency coverage of 790-960MHz and 1710-2690MHz, but also has good radiation performance.
  • FIG. 1 is a schematic structural diagram of an antenna system according to the present invention
  • FIG. 2 is a schematic diagram of a circuit structure of an antenna system according to the present invention.
  • FIG. 3 shows the passive efficiency of the antenna system of the present invention
  • FIG. 9 is a return loss diagram of the antenna system of the present invention in state 6;
  • FIG. 10 is a return loss diagram of the antenna system of the present invention in state 7.
  • an embodiment of the present invention provides an antenna system 100 including a metal case 1, a circuit board 2, and an antenna unit 3, and the circuit board 2 is located in the metal case 1.
  • the circuit board 2 includes a radio frequency feed 21 and an adjustable capacitor 22.
  • the metal case 1 includes a radiation frame 10 and a grounded back shell 11 spaced from the radiation frame 10. Fractures 12 are respectively formed between the grounded back shells 11, and the radiation frame 10 and the grounded back shell 11 are connected by a connecting rib 13.
  • the radiation frame 10 is a low-frequency main radiator.
  • the antenna unit 3 is connected to the radio frequency feed source 21 and is coupled to the radiation frame 10 to serve as a main radiator of medium and high frequencies.
  • the adjustable capacitor 22 is connected to the radiation frame 10. Specifically, the adjustable capacitor 22 is connected in series between the radiation frame 10 and a system ground, and the metal back shell 1 can be used as the system ground.
  • the radiation frequency of the antenna system 100 can cover 790-960MHz and 1710-2690MHz.
  • the capacitance value of the adjustable capacitor 22 ranges from 0.75 to 3.1 pF, and the antenna system 100 operates in different frequency bands corresponding to different capacitance values, that is, the antenna system 100 operates in Different states.
  • the antenna system 100 is operated in 7 different states as an example for detailed description. For details, refer to Table 1 below.
  • the capacitance of the adjustable capacitor 22 needs to be adjusted to switch the operating frequency band of the antenna system 100, that is, the antenna system can be made by selecting different states. 100 works in different frequency bands. Please refer to FIG. 4-10 for the return loss of the antenna system 100 in the states 1-7, and refer to FIG. 3 for the efficiency.
  • the adjustable capacitor 22 has multiple states, and the antenna system 100 provided by the present invention may have 32 different states, as shown in Table 2 below.
  • DVC value status Capacitance (pF) DVC value status Capacitance (pF) 0x00 0 0.75 0x10 16 1.96 0x01 1 0.83 0x11 17 2.04 0x02 2 0.9 0x12 18 2.11 0x03 3 0.98 0x13 19 2.19 0x04 4 1.05 0x14 20 2.27 0x05 5 1.13 0x15 twenty one 2.34 0x06 6 1.2 0x16 twenty two 2.42 0x07 7 1.28 0x17 twenty three 2.49 0x08 8 1.36 0x18 twenty four 2.57 0x09 9 1.43 0x19 25 2.65 0x0A 10 1.51 0x1A 26 2.72 0x0B 11 1.58 0x1B 27 2.8 0x0C 12 1.66 0x1C 28 2.87 0x0D 13 1.74 0x1D 29 2.95 0x0E 14 1.81 0x1E 30 3.02 0x0F
  • the adjustable capacitor 22 can select the working state of the antenna system 100 by changing the capacitance value.
  • the present invention does not limit the number of states of the antenna system 100 to 7, in other embodiments In, you can choose different capacitance values and number of states.
  • the present invention also provides a mobile terminal including the antenna system 100 described above.
  • the present invention provides an antenna system 100.
  • an adjustable capacitor 22 as a tuner of the antenna system 100
  • the antenna system 100 not only achieves a radiation frequency coverage of 790-960MHz and 1710-2690MHz, but also has good performance. Radiation performance.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Support Of Aerials (AREA)

Abstract

本发明提供了一种天线系统，包括金属壳体、线路板以及天线单元，线路板位于所述金属壳体内，所述线路板包括射频馈源和可调电容，所述金属壳体包括辐射边框和接地背壳，所述辐射边框的两端与所述接地背壳之间分别形成断口，所述天线单元与所述射频馈源连接并与所述辐射边框耦合设置，所述可调电容与所述辐射边框连接以通过切换不同容值来改变所述天线系统的电长度。与相关技术相比，本发明提供的一种天线系统，其通过设置可调电容作为天线系统的调谐器，不但实现天线系统辐射频率覆盖790-960MHz和1710-2690MHz，而且具有良好的辐射性能。

Description

天线系统及移动终端 【技术领域】
本发明涉及天线技术领域，尤其涉及一种天线系统及移动终端。
【背景技术】
在无线通信设备中，总存在一个向空间辐射电磁能量和从空间接收电磁能量的装置，这个装置就是天线。天线的作用是将调制到射频频率的数字信号或模拟信号发射到空间无线信道，或从空间无线信道接收调制在射频频率上的数字或模拟信号。
金属边框架构是手机结构设计中的主流方案，能提供更好的保护、美观度、热扩散以及用户体验，但是由于金属对电磁波的屏蔽作用，会严重影响天线的辐射性能，降低天线的增益。
因此，有必要提供一种新型的天线系统以解决上述问题。
【发明内容】
本发明的目的在于提供一种天线系统，其具有良好的辐射性能。
本发明的技术方案如下：一种天线系统，包括金属壳体、线路板以及天线单元，线路板位于所述金属壳体内，所述线路板包括射频馈源和可调电容，所述金属壳体包括辐射边框和与所述辐射边框间隔设置的接地背壳，所述辐射边框的两端与所述接地背壳之间分别形成断口，所述天线单元与所述射频馈源连接并与所述辐射边框耦合设置，所述可调电容与所述辐射边框连接以通过切换不同容值来改变所述天线系统的电长度。
优选的，所述天线系统辐射频率覆盖790-960MHz和1710-2690MHz。
优选的，所述可调电容的容值范围为0.75～3.1pF。
优选的，所述辐射边框通过连接筋与所述接地背壳连接。
本发明还提供了一种移动终端，包括所述的天线系统。
与相关技术相比，本发明提供的一种天线系统，其通过设置可调电容 作为天线系统的调谐器，不但实现天线系统辐射频率覆盖790-960MHz和1710-2690MHz，而且具有良好的辐射性能。
【附图说明】
为了更清楚地说明本发明实施例中的技术方案，下面将对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它的附图，其中：
图1为本发明天线系统的结构示意图；
图2为本发明天线系统的电路结构示意图；
图3为本发明天线系统的无源效率；
图4为本发明天线系统在状态1的回波损耗图；
图5为本发明天线系统在状态2的回波损耗图；
图6为本发明天线系统在状态3的回波损耗图；
图7为本发明天线系统在状态4的回波损耗图；
图8为本发明天线系统在状态5的回波损耗图；
图9为本发明天线系统在状态6的回波损耗图；
图10为本发明天线系统在状态7的回波损耗图。
【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，所描述的实施例仅是本发明的一部分实施例，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做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
请参阅图1和图2，本发明实施例提供了一种天线系统100，包括金属壳体1、线路板2以及天线单元3，线路板2位于所述金属壳体1内。所述线路板2包括射频馈源21和可调电容22，所述金属壳体1包括辐射边框10和与所述辐射边框10间隔设置的接地背壳11，所述辐射边框10的两端与所述接地背壳11之间分别形成断口12，所述辐射边框10与所述接地背 壳11之间通过连接筋13连接。所述辐射边框10为低频的主要辐射体。
所述天线单元3与所述射频馈源21连接并与所述辐射边框10耦合设置，用作中高频主要辐射体。
所述可调电容22与所述辐射边框10连接，具体的，所述可调电容22串接于所述辐射边框10与系统地之间，而所述金属背壳1可作为所述系统地，通过切换所述可调电容22的不同容值来改变所述天线系统100的电长度，实现所述天线系统100的辐射频率覆盖790-960MHz和1710-2690MHz。在本发明优选的实施方式中，所述可调电容22的容值范围为0.75～3.1pF，不同的容值，所述天线系统100对应工作在不同的频段，即所述天线系统100工作在不同状态。
现以所述天线系统100工作在7个不同状态为例进行详细说明，具体可参照下表1。
表1
状态 容值(pF) 频段
状态1 0.75 GSM900-TIS/LTE-B7/38/40/41
状态2 0.9 GSM900-TRP/WCDMA-8/LTE-B8
状态3 1.05 GSM850-TIS
状态4 1.28 GSM850-TRP/CDMABC0/WCDMA-5/LTE-B5/WCDMA-1/LTE-B1/TD-A
状态5 1.74 GSM1900-TIS/TD-F/LTE-B20/LTE-B39
状态6 1.96 GSM1900-TRP/WCDMA-2/LTE-B2
状态7 3.1 GSM1800/WCDMA-4/LTE-B3/4
由上表1可以看出，只需要调节所述可调电容22的容值，即可实现所述天线系统100的工作频段的切换，也就是说，通过选择不同的状态可以使得所述天线系统100工作在不同的频段。所述天线系统100在状态1-7的回波损耗请参阅图4-10，效率请参阅图3。
事实上，所述可调电容22具有多种状态，本发明提供的所述天线系统100可具有32中不同的状态，如下表2所示。
表2
DVC值 状态 容值(pF) DVC值 状态 容值(pF)
0x00 0 0.75 0x10 16 1.96
0x01 1 0.83 0x11 17 2.04
0x02 2 0.9 0x12 18 2.11
0x03 3 0.98 0x13 19 2.19
0x04 4 1.05 0x14 20 2.27
0x05 5 1.13 0x15 21 2.34
0x06 6 1.2 0x16 22 2.42
0x07 7 1.28 0x17 23 2.49
0x08 8 1.36 0x18 24 2.57
0x09 9 1.43 0x19 25 2.65
0x0A 10 1.51 0x1A 26 2.72
0x0B 11 1.58 0x1B 27 2.8
0x0C 12 1.66 0x1C 28 2.87
0x0D 13 1.74 0x1D 29 2.95
0x0E 14 1.81 0x1E 30 3.02
0x0F 15 1.89 0x1F 31 3.1
由表2可见，所述可调电容22通过改变容值就可以选择所述天线系统100的工作状态，当然，本发明并不限制所述天线系统100的状态数量为7个，在其他实施例中，可以选用不同的容值和状态数量。
本发明还提供了一种移动终端，包括所述的天线系统100。
与相关技术相比，本发明提供的一种天线系统100，其通过设置可调电容22作为天线系统100的调谐器，不但实现天线系统100辐射频率覆盖790-960MHz和1710-2690MHz，而且具有良好的辐射性能。
以上所述的仅是本发明的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本发明创造构思的前提下，还可以做出改进，但这些均属于本发明的保护范围。

Claims (5)

  1. 一种天线系统，包括金属壳体、线路板以及天线单元，线路板位于所述金属壳体内，其特征在于，所述线路板包括射频馈源和可调电容，所述金属壳体包括辐射边框和与所述辐射边框间隔设置的接地背壳，所述辐射边框的两端与所述接地背壳之间分别形成断口，所述天线单元与所述射频馈源连接并与所述辐射边框耦合设置，所述可调电容与所述辐射边框连接以通过切换不同容值来改变所述天线系统的电长度。
  2. 根据权利要求1所述的天线系统，其特征在于，所述天线系统辐射频率覆盖790-960MHz和1710-2690MHz。
  3. 根据权利要求1所述的天线系统，其特征在于，所述可调电容的容值范围为0.75～3.1pF。
  4. 根据权利要求1所述的天线系统，其特征在于，所述辐射边框通过连接筋与所述接地背壳连接。
  5. 一种移动终端，其特征在于，包括如权利要求1-4任意一项所述的天线系统。
PCT/CN2019/087459 2018-08-03 2019-05-17 天线系统及移动终端 Ceased WO2020024657A1 (zh)

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CN109149085A (zh) * 2018-08-03 2019-01-04 瑞声科技(新加坡)有限公司 天线系统及移动终端
CN115117600B (zh) * 2021-03-22 2024-02-20 启碁科技股份有限公司 天线结构与电子装置

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