WO2020140547A1 - 滤波器天线 - Google Patents

滤波器天线 Download PDF

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Publication number
WO2020140547A1
WO2020140547A1 PCT/CN2019/110854 CN2019110854W WO2020140547A1 WO 2020140547 A1 WO2020140547 A1 WO 2020140547A1 CN 2019110854 W CN2019110854 W CN 2019110854W WO 2020140547 A1 WO2020140547 A1 WO 2020140547A1
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WO
WIPO (PCT)
Prior art keywords
antenna
layer
filter
circuit substrate
microstrip line
Prior art date
Application number
PCT/CN2019/110854
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English (en)
French (fr)
Inventor
刘毛
Original Assignee
瑞声声学科技(深圳)有限公司
瑞声科技(新加坡)有限公司
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Publication date
Application filed by 瑞声声学科技(深圳)有限公司, 瑞声科技(新加坡)有限公司 filed Critical 瑞声声学科技(深圳)有限公司
Publication of WO2020140547A1 publication Critical patent/WO2020140547A1/zh

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Classifications

    • 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
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0414—Substantially flat resonant element parallel to ground plane, e.g. patch antenna in a stacked or folded configuration
    • 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
    • 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
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/045—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding means

Definitions

  • the utility model relates to the technical field of antennas, in particular to a filter antenna.
  • the fifth generation of communication technology is dedicated to building an ecosystem of information and communication technologies and is one of the hottest topics in the industry. Unlike the previous 2G, 3G and 4G, 5G is not only an upgrade of mobile communication technology, but also a driving platform for the future digital world and an infrastructure for the development of the Internet of Things. It will truly create a new era of full connectivity.
  • the technical problem to be solved by the utility model is to provide a filter antenna with filtering effect and good reliability.
  • the present invention provides a filter antenna, which includes a circuit substrate layer, an antenna ground layer attached to the bottom surface of the circuit substrate layer, and a first embedded in the circuit substrate layer An antenna layer and a second antenna layer attached to the top surface of the circuit substrate layer; the antenna ground layer is provided with a microstrip line, the second antenna layer and the first antenna layer are spaced apart and form a coupling, The first antenna layer is fed through the microstrip line.
  • the first antenna layer and the second antenna layer are both patch-type radiation sheets.
  • the antenna stratum includes a body attached to the bottom surface of the circuit substrate layer and a semi-closed feed slot opened in the body, the microstrip line is accommodated in the semi-closed slot and along the The semi-closed groove extends, and the microstrip line is spaced from the body.
  • the semi-closed slot includes a closed end and an open end
  • the filter antenna further includes a feed port provided at the open end, and the microstrip line is fed through the feed port.
  • the filter antenna further includes a feeding probe connected to the first antenna layer and an end of the microstrip line corresponding to the closed end.
  • the bandwidth of the filter antenna is 24.75-27.5 GHz, and its relative bandwidth is 10.5%.
  • the thickness of the filter antenna is 0.8-1.2 mm.
  • a filter antenna provided by the present invention adopts a stacked structure, the overall thickness is thin, the first antenna layer and the second antenna layer are spaced apart and form a coupling, and the first antenna layer passes The microstrip line feed of the antenna ground layer, and the filter antenna realizes filtering of clutter, protects the back-end radio frequency circuit, and can meet the requirements of indoor 5G communication base stations.
  • FIG. 1 is a schematic diagram of a three-dimensional structure of a filter antenna of the utility model
  • FIG. 2 is a partially exploded schematic view of the three-dimensional structure of the filter antenna of the utility model
  • Figure 3 is a cross-sectional view taken along line A-A in Figure 1;
  • Figure 4 is an enlarged view of part B in Figure 3;
  • Fig. 6 is an efficiency curve diagram of the filter antenna of the utility model.
  • the present invention provides a filter antenna 100, which includes a line substrate layer 1, an antenna ground layer 2, a first antenna layer 3, a second antenna layer 4, a feed port 5 and Feed probe (not shown).
  • the circuit substrate layer 1, the antenna ground layer 2, the first antenna layer 3 and the second antenna layer 4 have a stacked structure, so that the thickness of the filter antenna is 0.8-1.2 mm, and the overall thickness is thin.
  • the circuit substrate layer 1 includes a bottom surface 11, a top surface 12 opposite to the bottom surface 11, and a side surface 13 connecting the bottom surface 11 and the top surface 12.
  • the antenna ground layer 2 is attached to the bottom surface 11 of the circuit substrate layer 1.
  • the antenna stratum 2 is provided with a microstrip line 21.
  • the first antenna layer 3 is embedded in the circuit substrate layer 1.
  • the first antenna layer 3 is a patch-type radiator, which is used for feeding.
  • the first antenna layer 33 is fed through the microstrip line 21.
  • the second antenna layer 4 is attached to the top surface 12 of the circuit substrate layer 1.
  • the second antenna layer 4 is a patch-type radiator.
  • the antenna ground layer 2 includes a body 22 attached to the bottom surface 11 of the circuit substrate layer 1 and a semi-closed feed slot 23 opened on the body 22, and the microstrip line 21 is housed in In the semi-closed groove 23 and extending along the semi-closed groove 23, the microstrip line 21 is spaced from the body 22.
  • the semi-closed groove 23 includes a closed end 231 and an open end 232.
  • the feeding port 5 is provided at the open end 232, and the microstrip line 23 is fed through the feeding port 5.
  • the second antenna layer 4 is spaced apart from the first antenna layer 3 and forms a coupling; the first antenna layer 3 is fed through the microstrip line 21. Specifically, the feeding probe is connected to the first antenna layer 3 and the end of the microstrip line 21 corresponding to the closed end 231.
  • the second antenna layer 4 is coupled with the first antenna layer 3 and functions as a filter coupling sheet. Therefore, the filter antenna 100 itself has a filtering effect. If the feed port 5 of the filter antenna 100 is regarded as the first port and the far-field radiation area is regarded as the second port, the radiation efficiency of the filter antenna 100 is equivalent to S21 of a filter (Transmission coefficient). With reference to FIG. 6, the filter antenna 100 of the present invention only has a pass band at the required frequency band, and both low and high frequencies are stop bands.
  • the above structure makes the bandwidth of the filter antenna 100 of the present invention is 24.75 ⁇ 27.5GHz, and its relative bandwidth is 10.5%, which has a filtering effect and good reliability.
  • the filter antenna 100 itself starts filtering out clutter to protect the back-end radio frequency circuit, thereby improving reliability.
  • a filter antenna provided by the present invention adopts a stacked structure, the overall thickness is thin, the first antenna layer and the second antenna layer are spaced apart and form a coupling, and the first antenna layer passes The feed port of the antenna formation feeds, and the filter antenna realizes filtering of clutter, protects the back-end radio frequency circuit, and can meet the requirements of indoor 5G communication base stations.

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  • Waveguide Aerials (AREA)

Abstract

本实用新型提供了一种滤波器天线，其包括线路基材层、贴设于所述线路基材层底面的天线地层、嵌设于所述线路基材层内的第一天线层以及贴设于所述线路基材层顶面的第二天线层；所述天线地层设有微带线，所述第二天线层与所述第一天线层间隔设置并形成耦合，所述第一天线层通过所述微带线馈电。与相关技术相比，本实用新型的所述滤波器天线整体厚度薄，具有滤波作用且可靠性好，可满足室内5G通信基站的要求。

Description

滤波器天线 技术领域
本实用新型涉及天线技术领域，尤其涉及一种滤波器天线。
 背景技术
第五代通信技术（5G）致力于构建信息与通信技术的生态系统，是目前业界最热的课题之一。不同于以前的2G、3G和4G，5G不仅仅是移动通信技术的升级换代，更是未来数字世界的驱动平台和物联网发展的基础设施，将真正创建一个全联接的新时代。
 技术问题
但是随着5G技术的发展，现有的毫米波天线已经难以满足室内基站的要求。
因此，实有必要提供一种新的滤波器天线解决上述问题。
 技术解决方案
本实用新型需要解决的技术问题是提供一种具有滤波作用且可靠性好的滤波器天线。
为解决上述技术问题，本实用新型提供了一种滤波器天线，其包括线路基材层、贴设于所述线路基材层底面的天线地层、嵌设于所述线路基材层内的第一天线层以及贴设于所述线路基材层顶面的第二天线层；所述天线地层设有微带线，所述第二天线层与所述第一天线层间隔设置并形成耦合，所述第一天线层通过所述微带线馈电。
优选的，所述第一天线层和所述第二天线层均为贴片式辐射片。
优选的，所述天线地层包括贴设于所述线路基材层底面的本体和开设于所述本体的半封闭馈电槽，所述微带线收容于所述半封闭槽内且沿所述半封闭槽延伸，所述微带线与所述本体间隔设置。
优选的，所述半封闭槽包括一封闭端和一开口端，所述滤波器天线还包括设置于所述开口端的馈电口，所述微带线通过所述馈电口馈电。
优选的，所述滤波器天线还包括馈电探针，所述馈电探针连接所述第一天线层和所述微带线的对应所述封闭端的一端。
优选的，所述滤波器天线带宽为24.75~27.5GHz，其相对带宽为10.5%。
优选的，所述滤波器天线厚度为0.8~1.2mm。
 有益效果
与相关技术相比，本实用新型提供的一种滤波器天线采用堆叠结构，整体厚度薄，将所述第一天线层和所述第二天线层间隔并形成耦合，所述第一天线层通过所述天线地层的微带线馈电，且所述滤波器天线实现对杂波的滤除，对后端射频电路起到保护作用，可满足室内5G通信基站的要求。
 附图说明
为了更清楚地说明本实用新型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实用新型的一些实施例，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为本实用新型滤波器天线的立体结构示意图；
图2为本实用新型滤波器天线的立体结构部分分解示意图；
图3为沿图1中A-A线剖示图；
图4为图3中B部分的放大图；
图5为本实用新型滤波器天线的反射系数曲线图；
图6为本实用新型滤波器天线的效率曲线图。
 本发明的实施方式
下面将结合本实用新型实施例中的附图，对本实用新型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实用新型的一部分实施例，而不是全部的实施例。基于本实用新型中的实施例，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，都属于本实用新型保护的范围。
请参阅图1-4所示，本实用新型提供了一种滤波器天线100，其包括线路基材层1、天线地层2、第一天线层3、第二天线层4、馈电口5以及馈电探针（图未示）。所述线路基材层1、天线地层2、第一天线层3以及第二天线层4呈叠设结构，使得所述滤波器天线厚度为0.8~1.2mm，整体厚度薄。
所述线路基材层1包括底面11、与所述底面11相对的顶面12以及连接所述底面11与所述顶面12的侧面13。
所述天线地层2贴设于所述线路基材层1的底面11。所述天线地层2设有微带线21。
所述第一天线层3嵌设于所述线路基材层1内。本实施方式中，所述第一天线层3为贴片式辐射片，用于实现馈电。具体的，所述第一天线层33通过所述微带线21馈电。
所述第二天线层4贴设于所述线路基材层1的顶面12。本实施方式中，所述第二天线层4为贴片式辐射片。
本实施方式中，所述天线地层2包括贴设于所述线路基材层1的底面11的本体22和开设于所述本体22的半封闭馈电槽23，所述微带线21收容于所述半封闭槽23内且沿所述半封闭槽23延伸，所述微带线21与所述本体22间隔设置。
具体的，所述半封闭槽23包括一封闭端231和一开口端232。所述馈电口5设置于所述开口端232，所述微带线23通过所述馈电口5馈电。
所述第二天线层4与所述第一天线层3间隔设置并形成耦合；所述第一天线层3通过所述微带线21馈电。具体的，所述馈电探针连接所述第一天线层3和所述微带线21的对应所述封闭端231的一端。
本实用新型中，第二天线层4与第一天线层3耦合，起到滤波器耦合片的作用，因此所述滤波器天线100本身就具有滤波作用。如果将所述滤波器天线100的所述馈电口5看做第一端口，其远场辐射区看做第二端口，则所述滤波器天线100的辐射效率等效于一个滤波器的S21（传输系数） 。结合图6，本实用新型的所述滤波器天线100只在需求频段处有通带，低、高频均是阻带。
请结合图5-6，上述结构使得本实用新型的所述滤波器天线100的带宽为24.75~27.5GHz，其相对带宽为10.5%，具有滤波作用且可靠性好。对于日益复杂的频谱资源，在该滤波器天线100的自身就开始滤除杂波，对后端射频电路起到保护作用，从而提高可靠性。
与相关技术相比，本实用新型提供的一种滤波器天线采用堆叠结构，整体厚度薄，将所述第一天线层和所述第二天线层间隔并形成耦合，所述第一天线层通过所述天线地层的所述馈电端口馈电，且所述滤波器天线实现对杂波的滤除，对后端射频电路起到保护作用，可满足室内5G通信基站的要求。
以上所述的仅是本实用新型的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本实用新型创造构思的前提下，还可以做出改进，但这些均属于本实用新型的保护范围。

Claims (7)

  1. 一种滤波器天线，其特征在于，所述滤波器天线包括线路基材层、贴设于所述线路基材层底面的天线地层、嵌设于所述线路基材层内的第一天线层以及贴设于所述线路基材层顶面的第二天线层；所述天线地层设有微带线，所述第二天线层与所述第一天线层间隔设置并形成耦合，所述第一天线层通过所述微带线馈电。
  2. 根据权利要求1所述的滤波器天线，其特征在于，所述第一天线层和所述第二天线层均为贴片式辐射片。
  3. 根据权利要求1所述的滤波器天线，其特征在于，所述天线地层包括贴设于所述线路基材层底面的本体和开设于所述本体的半封闭馈电槽，所述微带线收容于所述半封闭槽内且沿所述半封闭槽延伸，所述微带线与所述本体间隔设置。
  4. 根据权利要求3所述的滤波器天线，其特征在于，所述半封闭槽包括一封闭端和一开口端，所述滤波器天线还包括设置于所述开口端的馈电口，所述微带线通过所述馈电口馈电。
  5. 根据权利要求4所述的滤波器天线，其特征在于，所述滤波器天线还包括馈电探针，所述馈电探针连接所述第一天线层和所述微带线的对应所述封闭端的一端。
  6. 根据权利要求1所述的滤波器天线，其特征在于，所述滤波器天线带宽为24.75~27.5GHz，其相对带宽为10.5%。
  7. 根据权利要求1所述的滤波器天线，其特征在于，所述滤波器天线厚度为0.8-1.2mm。
PCT/CN2019/110854 2018-12-31 2019-10-12 滤波器天线 WO2020140547A1 (zh)

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Application Number Priority Date Filing Date Title
CN201822279023.7U CN209389213U (zh) 2018-12-31 2018-12-31 滤波器天线
CN201822279023.7 2018-12-31

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN209389213U (zh) * 2018-12-31 2019-09-13 瑞声科技(新加坡)有限公司 滤波器天线
CN212810537U (zh) * 2020-06-30 2021-03-26 瑞声科技(新加坡)有限公司 空气微带线天线单元及天线系统

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CN206834330U (zh) * 2017-05-23 2018-01-02 华南理工大学 基于双模谐振器的fdd天线
CN108550986A (zh) * 2012-09-21 2018-09-18 株式会社村田制作所 双极化天线
CN108598711A (zh) * 2018-03-28 2018-09-28 宇龙计算机通信科技(深圳)有限公司 一种天线模块及通信终端
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CN108550986A (zh) * 2012-09-21 2018-09-18 株式会社村田制作所 双极化天线
CN105552550A (zh) * 2016-01-30 2016-05-04 华为技术有限公司 一种贴片天线单元及天线
CN206834330U (zh) * 2017-05-23 2018-01-02 华南理工大学 基于双模谐振器的fdd天线
CN108598711A (zh) * 2018-03-28 2018-09-28 宇龙计算机通信科技(深圳)有限公司 一种天线模块及通信终端
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