WO2020140555A1 - 紧凑型双频段mimo天线 - Google Patents

紧凑型双频段mimo天线 Download PDF

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Publication number
WO2020140555A1
WO2020140555A1 PCT/CN2019/111288 CN2019111288W WO2020140555A1 WO 2020140555 A1 WO2020140555 A1 WO 2020140555A1 CN 2019111288 W CN2019111288 W CN 2019111288W WO 2020140555 A1 WO2020140555 A1 WO 2020140555A1
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WIPO (PCT)
Prior art keywords
antenna
arm
ground
point
short
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Ceased
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PCT/CN2019/111288
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English (en)
French (fr)
Inventor
武景
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AAC Technologies Holdings Shenzhen Co Ltd
AAC Technologies Holdings Nanjing Co Ltd
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AAC Acoustic Technologies Shenzhen Co Ltd
AAC Technologies Holdings Nanjing Co Ltd
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Publication of WO2020140555A1 publication Critical patent/WO2020140555A1/zh
Anticipated expiration legal-status Critical
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Classifications

    • 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
    • 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
    • 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
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • 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
    • 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
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/35—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using two or more simultaneously fed points
    • 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
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364—Creating multiple current paths
    • H01Q5/371—Branching current paths
    • 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
    • H01Q5/385—Two or more parasitic elements
    • 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
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems

Definitions

  • the invention relates to the technical field of communication, in particular to a compact dual-band MIMO antenna.
  • MIMO technology has attracted great attention as an important means to increase the data transmission rate.
  • the use of MIMO technology can increase the channel capacity, and at the same time can improve the reliability of the channel and reduce the bit error rate.
  • the MIMO technology It is considered as one of the alternative key technologies of the new generation of communication (5G) technology, and MIMO antenna as an important part of MIMO system, its performance directly affects the performance of MIMO system.
  • MIMO antenna technology faces many important problems, such as antenna coupling and polarization isolation.
  • improving isolation is the main content of studying antenna systems.
  • a large number of structures that improve the isolation between antennas are beginning to appear.
  • the object of the present invention is to provide a compact dual-band MIMO antenna and electronic equipment with a compact structure and high isolation.
  • a compact dual-band MIMO antenna includes a system unit, a radiating arm having an open end and a short end, a first antenna formed at the open end, and a first antenna formed at the short end Two antennas, the first antenna further includes a ground arm connecting the radiation arm to the system ground unit, a first feed arm between the ground arm and the open circuit end, and the system ground unit For the connected first parasitic arm, the second antenna further includes a second feed arm located between the short-circuit end and the ground arm and a second parasitic arm connected to the system ground unit.
  • the first antenna is an inverted F antenna
  • the second antenna is a loop antenna forming an orthogonal mode with the inverted F antenna.
  • the system ground unit includes a first grounding point, a first feeding point, a second grounding point, a second feeding point, a third grounding point, and a fourth grounding point arranged in sequence, the first grounding point The location is connected to the first parasitic arm, the first feed arm is connected to the first feed point, the second ground point is connected to the ground arm, and the second feed point is connected to the A second feed arm is connected, the third ground point is connected to the second parasitic arm, and the fourth ground point is connected to the short circuit end.
  • the first ground point is connected to an end of the first parasitic arm near the open end
  • the third ground point is connected to an end of the second parasitic arm near the short end.
  • the compact dual-band MIMO antenna further includes a base material layer, and the first antenna and the second antenna are disposed on the base material layer.
  • the first antenna and the second antenna are formed on the substrate layer by FPC, LDS or PCB processes.
  • the present invention has the following beneficial effects: the antenna has a compact structure and high isolation; it has dual frequency bands and has excellent performance in the dual frequency band; the structure is simple, easy to manufacture, small in size, light in weight and convenient Mass production.
  • FIG. 1 is a partial structural schematic diagram of a compact dual-band MIMO antenna of the present invention
  • FIG. 2 is a schematic diagram of a partial structure of a compact dual-band MIMO antenna of the present invention
  • FIG. 3 is a graph of S-parameter curves of the first antenna and the second antenna of the compact dual-band MIMO antenna of the present invention.
  • 5 is a graph of the envelope correlation coefficient between the first antenna and the second antenna of the compact dual-band MIMO antenna of the present invention.
  • the present invention provides a compact dual-band MIMO antenna 100, including a system ground unit 1, a radiation arm 2 having an open end and a short end, a first antenna 3 formed at the open end, and The second antenna 4 formed at the end of the short circuit.
  • the first antenna 3 is an inverted F antenna
  • the second antenna 4 is a loop antenna that forms an orthogonal mode with the inverted F antenna.
  • the first antenna 3 further includes a ground arm 31 connecting the radiation arm 2 to the system ground unit 1, a first feed arm 32 between the ground arm 31 and the open end, and the The first parasitic arm 33 connected to the system ground unit 1.
  • the second antenna 4 further includes a second feed arm 41 located between the short-circuit end and the ground arm 31 and a second parasitic arm 42 connected to the system ground unit 1.
  • the system ground unit 1 includes a first ground point 11, a first feed point 12, a second ground point 13, a second feed point 14, a third ground point 15 and a fourth ground point 16 arranged in sequence.
  • the first ground point 11 is connected to the first parasitic arm 33
  • the first feed arm 32 is connected to the first feed point 12
  • the second ground point 13 is connected to the ground arm 31
  • the second feed point 14 is connected to the second feed arm 41
  • the third ground point 15 is connected to the second parasitic arm 42
  • the fourth ground point 16 is connected to the short circuit end .
  • the first ground point 11 is connected to an end of the first parasitic arm 33 near the open end, and the third ground point 15 is connected to the second parasitic arm 42. One end near the short-circuit end is connected.
  • the compact dual-band MIMO antenna 100 further includes a base material layer 5, the first antenna 3 and the second antenna 4 are disposed on the base material layer 5, the base material layer 5 is made of plastic,
  • the base material layer 5 may be an antenna support, a terminal back cover or PBC.
  • the first antenna 3 and the second antenna 4 are formed on the substrate layer 5 by FPC, LDS or PCB processes.
  • FPC FPC, LDS or PCB processes.
  • the present invention does not limit the specific process, and any other feasible process should also belong to this Within the scope of protection of the invention.
  • FIGS. 3-5 The performance of the compact dual-band MIMO antenna 100 is shown in FIGS. 3-5.
  • S1, 1 is the reflection coefficient of the first antenna
  • S2, 2 is the reflection coefficient of the second antenna 4
  • S1, 2 and S2, 1 can characterize the first antenna 3 and all
  • the isolation between the second antenna 4 is described.
  • curve A represents the efficiency of the first antenna 3
  • curve B represents the efficiency of the second antenna 4. It can be seen from the figure that both the first antenna 3 and the second antenna 4 can work in the Sub-6 GHz frequency band (3.3-3.6 GHz and 4.8-5.0 GHz), and have excellent isolation in this frequency band.
  • the present invention has the following beneficial effects: the antenna has a compact structure and high isolation; it has dual frequency bands and has excellent performance in the dual frequency band; the structure is simple, easy to manufacture, small in size, light in weight and convenient Mass production.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)

Abstract

本发明提供了一种紧凑型双频段MIMO天线，包括系统地单元、具有开路末端和短路末端的辐射臂、形成于所述开路末端的第一天线和形成于所述短路末端的第二天线，所述第一天线还包括连接所述辐射臂至所述系统地单元的接地臂、位于所述接地臂和所述开路末端之间的第一馈电臂及与所述系统地单元连接的第一寄生臂，所述第二天线还包括位于所述短路末端和所述接地臂之间的第二馈电臂及与所述系统地单元连接的第二寄生臂。与相关技术相比，本发明具有如下有益效果：天线结构紧凑，且隔离度高；具有双频段，且在双频段上都具有优秀的性能；结构简单，易于加工制作，体积小重量轻，便于大规模生产。

Description

紧凑型双频段MIMO天线 技术领域
本发明涉及通讯技术领域，尤其涉及一种紧凑型双频段MIMO天线。
 背景技术
随着移动通信技术的发展，MIMO技术作为提高数据传输率的重要手段得到人们的极大关注，利用MIMO技术可以提高信道容量，同时也可以提高信道的可靠性、降低误码率，同时MIMO技术被认为是新一代通信(5G)技术的备选关键技术之一，而MIMO天线作为MIMO系统的重要组成部分，它的性能直接影响着MIMO系统的性能。
 技术问题
目前MIMO天线技术面临着许多重要的难题，比如天线耦合、极化隔离等问题。对于减小天线之间的耦合，提高隔离度是研究天线系统的主要内容。为解决这方面的问题，大量提高天线之间的隔离度的结构开始出现。
 技术解决方案
本发明的目的在于提供一种结构紧凑、高隔离度的紧凑型双频段MIMO天线及电子设备。
本发明的技术方案如下：一种紧凑型双频段MIMO天线，包括系统地单元、具有开路末端和短路末端的辐射臂、形成于所述开路末端的第一天线和形成于所述短路末端的第二天线，所述第一天线还包括连接所述辐射臂至所述系统地单元的接地臂、位于所述接地臂和所述开路末端之间的第一馈电臂及与所述系统地单元连接的第一寄生臂，所述第二天线还包括位于所述短路末端和所述接地臂之间的第二馈电臂及与所述系统地单元连接的第二寄生臂。
优选的，所述第一天线为倒F天线，所述第二天线为与所述倒F天线形成正交模的回路天线。
优选的，所述系统地单元包括依次排列设置的第一接地点、第一馈电点、第二接地点、第二馈电点、第三接地点以及第四接地点，所述第一接地点与所述第一寄生臂连接，所述第一馈电臂与所述第一馈电点连接，所述第二接地点与所述接地臂连接，所述第二馈电点与所述第二馈电臂连接，所述第三接地点与所述第二寄生臂连接，所述第四接地点与所述短路末端连接。
优选的，所述第一接地点与所述第一寄生臂的靠近所述开路末端的一端连接，所述第三接地点与所述第二寄生臂的靠近所述短路末端的一端连接。
优选的，所述紧凑型双频段MIMO天线还包括基材层，所述第一天线和所述第二天线设置于所述基材层上。
优选的，所述第一天线和所述第二天线采用FPC、LDS或PCB工艺成型于所述基材层上。
 有益效果
与相关技术相比，本发明具有如下有益效果：天线结构紧凑，且隔离度高；具有双频段，且在双频段上都具有优秀的性能；结构简单，易于加工制作，体积小重量轻，便于大规模生产。
 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为本发明紧凑型双频段MIMO天线的部分结构示意图；
图2为本发明紧凑型双频段MIMO天线的部分结构示意图；
图3为本发明紧凑型双频段MIMO天线的第一天线和第二天线的S参数曲线图；
图4为本发明紧凑型双频段MIMO天线的第一天线和第二天线的效率曲线图；
图5为本发明紧凑型双频段MIMO天线的第一天线和第二天线之间的包络相关系数曲线图。
 本发明的实施方式
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2，本发明提供了一种紧凑型双频段MIMO天线100，包括系统地单元1、具有开路末端和短路末端的辐射臂2、形成于所述开路末端的第一天线3和形成于所述短路末端的第二天线4。在本发明的具体实施方式中，所述第一天线3为倒F天线，所述第二天线4为与所述倒F天线形成正交模的回路天线。
所述第一天线3还包括连接所述辐射臂2至所述系统地单元1的接地臂31、位于所述接地臂31和所述开路末端之间的第一馈电臂32及与所述系统地单元1连接的第一寄生臂33。所述第二天线4还包括位于所述短路末端和所述接地臂31之间的第二馈电臂41及与所述系统地单元1连接的第二寄生臂42。
所述系统地单元1包括依次排列设置的第一接地点11、第一馈电点12、第二接地点13、第二馈电点14、第三接地点15以及第四接地点16。所述第一接地点11与所述第一寄生臂33连接，所述第一馈电臂32与所述第一馈电点12连接，所述第二接地点13与所述接地臂31连接，所述第二馈电点14与所述第二馈电臂41连接，所述第三接地点15与所述第二寄生臂42连接，所述第四接地点16与所述短路末端连接。
在本发明的具体实施方式中，所述第一接地点11与所述第一寄生臂33的靠近所述开路末端的一端连接，所述第三接地点15与所述第二寄生臂42的靠近所述短路末端的一端连接。
所述紧凑型双频段MIMO天线100还包括基材层5，所述第一天线3和所述第二天线4设置于所述基材层5上，所述基材层5由塑料制成，所述基材层5可以为天线支架、终端背壳或PBC。
所述第一天线3和所述第二天线4采用FPC、LDS或PCB工艺成型于所述基材层5上，当然，本发明并不限制具体的工艺，任何其它可行的工艺理应也属于本发明的保护范围内。
所述紧凑型双频段MIMO天线100的性能参见图3-5。其中，图3中S1，1为所述第一天线3的反射系数，S2,2为所述第二天线4的反射系数，S1，2和S2，1可表征所述第一天线3和所述第二天线4之间的隔离度。图4中，曲线A表示第一天线3的效率，曲线B表示第二天线4的效率。从图中可看出，所述第一天线3和第二天线4均可工作于Sub-6GHz频段（3.3-3.6GHz及4.8-5.0GHz）,且在该频段内隔离度优秀。
与相关技术相比，本发明具有如下有益效果：天线结构紧凑，且隔离度高；具有双频段，且在双频段上都具有优秀的性能；结构简单，易于加工制作，体积小重量轻，便于大规模生产。
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 (6)

  1. 一种紧凑型双频段MIMO天线，其特征在于，包括系统地单元、具有开路末端和短路末端的辐射臂、形成于所述开路末端的第一天线和形成于所述短路末端的第二天线，所述第一天线还包括连接所述辐射臂至所述系统地单元的接地臂、位于所述接地臂和所述开路末端之间的第一馈电臂及与所述系统地单元连接的第一寄生臂，所述第二天线还包括位于所述短路末端和所述接地臂之间的第二馈电臂及与所述系统地单元连接的第二寄生臂。
  2. 根据权利要求1所述的紧凑型双频段MIMO天线，其特征在于，所述第一天线为倒F天线，所述第二天线为与所述倒F天线形成正交模的回路天线。
  3. 根据权利要求2所述的紧凑型双频段MIMO天线，其特征在于，所述系统地单元包括依次排列设置的第一接地点、第一馈电点、第二接地点、第二馈电点、第三接地点以及第四接地点，所述第一接地点与所述第一寄生臂连接，所述第一馈电臂与所述第一馈电点连接，所述第二接地点与所述接地臂连接，所述第二馈电点与所述第二馈电臂连接，所述第三接地点与所述第二寄生臂连接，所述第四接地点与所述短路末端连接。
  4. 根据权利要求3所述的紧凑型双频段MIMO天线，其特征在于，所述第一接地点与所述第一寄生臂的靠近所述开路末端的一端连接，所述第三接地点与所述第二寄生臂的靠近所述短路末端的一端连接。
  5. 根据权利要求1所述的紧凑型双频段MIMO天线，其特征在于，所述紧凑型双频段MIMO天线还包括基材层，所述第一天线和所述第二天线设置于所述基材层上。
  6. 根据权利要求5所述的紧凑型双频段MIMO天线，其特征在于，所述第一天线和所述第二天线采用FPC、LDS或PCB工艺成型于所述基材层上。
PCT/CN2019/111288 2018-12-31 2019-10-15 紧凑型双频段mimo天线 Ceased WO2020140555A1 (zh)

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