WO2020155986A1 - 一种双频天线 - Google Patents

一种双频天线 Download PDF

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Publication number
WO2020155986A1
WO2020155986A1 PCT/CN2019/129245 CN2019129245W WO2020155986A1 WO 2020155986 A1 WO2020155986 A1 WO 2020155986A1 CN 2019129245 W CN2019129245 W CN 2019129245W WO 2020155986 A1 WO2020155986 A1 WO 2020155986A1
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Prior art keywords
dual
metal conduction
band
path metal
conduction band
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PCT/CN2019/129245
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English (en)
French (fr)
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刘杰
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杭州海康威视数字技术股份有限公司
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Application filed by 杭州海康威视数字技术股份有限公司 filed Critical 杭州海康威视数字技术股份有限公司
Priority to EP19912442.1A priority Critical patent/EP3920328A4/en
Publication of WO2020155986A1 publication Critical patent/WO2020155986A1/zh

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    • 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
    • H01Q7/005—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 with variable reactance for tuning the antenna
    • 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
    • H01Q5/321—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 within a radiating element or between connected radiating elements

Definitions

  • This application relates to the technical field of wireless local area networks, and in particular to a dual-frequency antenna.
  • the purpose of the embodiments of the present application is to provide a dual-frequency antenna, which can achieve dual-frequency resonance only through a metal conduction band series capacitor, which can solve the large footprint and large size caused by the multi-branch multi-path structure. Trivial problem of adjusting the resonance frequency band.
  • the specific technical solutions are as follows:
  • the embodiment of the present application provides a dual-frequency antenna, which includes:
  • PCB board PCB board is provided with headroom area and non-headroom area;
  • the single-path metal conduction tape is arranged in the clearance area, and the end of the single-path metal conduction tape is electrically connected to the ground terminal of the PCB board;
  • the capacitor is connected between the excitation end and the end of the single-path metal conduction band.
  • the dual-frequency antenna includes multiple capacitors, and the multiple capacitors are connected in series on the single-path metal conduction band.
  • the clearance area is arranged at an edge of the PCB board, and the end and the excitation end of the single-path metal conduction band are located on the side of the opening that is biased toward the clearance area.
  • the dual-frequency antenna further includes a microstrip line, the microstrip line is arranged in a non-clear space area, and the excitation end of the single-path metal conduction band is electrically connected to the microstrip line.
  • the dual-frequency antenna further includes:
  • test connection part is connected in series with the capacitor on the single-path metal conduction band and arranged at the excitation end close to the single-path metal conduction band.
  • test connection part is a resistor connected in series with the single-path metal conduction band, and the resistance value of the resistor is zero.
  • the single-path metal conduction band is arranged in the clear space in a stacked reciprocating pattern.
  • a dual-frequency antenna includes a PCB board, a single-path metal conduction band and a capacitor.
  • the PCB board is provided with a headroom area and a non- headroom area.
  • the areas on the PCB board that are not laid with metal or wires form a headroom area, and the outside is a non- headroom area.
  • the single-path metal conduction band refers to a metal conduction band, and only one path is formed without branches.
  • the single-path metal conduction strip is arranged in the clearance area, and the end of the single-path metal conduction strip is electrically connected to the ground terminal of the PCB board to form a loop antenna. In this way, the high-frequency resonance of the dual-frequency antenna can be realized.
  • the capacitor is connected between the excitation end and the end of the single-path metal conduction band, so that the low-frequency resonance of the dual-frequency antenna can be realized.
  • the dual-frequency antenna can achieve dual-frequency resonance through single-path metal conduction bands and capacitors, and has a simple structure. Moreover, by adjusting the length of the single-path metal conduction band and the clearance area The area can adjust the high frequency resonance, and the low frequency resonance can be adjusted by adjusting the capacitance value of the capacitor, which effectively simplifies the antenna resonance adjustment work.
  • FIG. 1 is a schematic structural diagram of a dual-frequency antenna in a specific embodiment of the application
  • Fig. 2 is a return loss curve of a dual-frequency antenna in a specific embodiment of the application
  • Figure 3 is a schematic diagram of the efficiency of a dual-band antenna in a specific embodiment of the application.
  • the figure is a schematic structural diagram of a dual-frequency antenna in a specific embodiment of the application.
  • the present application provides a dual-frequency antenna, which includes a PCB board 10, a single-path metal conduction band 20 and a capacitor 30.
  • the PCB board 10 is provided with a clearance area 1a and a non-clearance area 2a.
  • the areas on the PCB board 10 without metal or wires form the clearance area 1a, and the non-clearance area 2a is outside.
  • the single-path metal conduction tape 20 refers to a metal conduction tape, and only one path is formed without branches.
  • the single-path metal conduction band 20 is arranged in the clearance area 1a, and the end of the single-path metal conduction band 20 is electrically connected to the ground terminal of the PCB board 10 to form a loop antenna. In this way, high-frequency resonance of the dual-frequency antenna can be realized.
  • the capacitor 30 is connected between the excitation end and the end of the single-path metal conduction band 20, so as to realize the low-frequency resonance of the dual-frequency antenna.
  • the dual-frequency antenna can realize dual-frequency resonance through a single-path metal conduction band 20 and a capacitor 30, and has a simple structure.
  • the high-frequency resonance can be adjusted by adjusting the length of the single-path metal conduction band 20 and the area of the clearance region 1a.
  • the high-frequency resonance can be adjusted by increasing the length of the single-path metal conduction band 20 when the area of the clearance zone 1a remains unchanged. For example, when the end 21 and the excitation end 22 of the single-path metal conduction band 20 remain unchanged, increase The length of the single-path metal conduction band 20, which is arranged in a wave shape or other stacked reciprocating arrangement in the clearance area 1a, can adjust the high frequency resonance.
  • the low frequency resonance can be adjusted by adjusting the capacitance value of the capacitor 30, and the capacitance value of the capacitor 30 is set according to the required low frequency resonance point to meet the requirements of different low frequency resonance points, which effectively simplifies the resonance adjustment work of the antenna.
  • the dual-band antenna includes a plurality of capacitors 30, and the plurality of capacitors 30 are connected in series on the single-path metal conduction band 20.
  • three capacitors 30 are connected in series on the single-path metal conduction band 20. It is preferable to use a plurality of capacitors 30 in series to accurately adjust the low-frequency resonance, reliably realize fine-tuning, and fully meet the requirements for the low-frequency resonance point.
  • the clearance area 1a is provided at an edge of the PCB board 10, and the end and the excitation end of the single-path metal conduction band 20 are located on the side of the opening that is biased toward the clearance area 1a.
  • This arrangement can increase the single-path metal The distance between the conduction band 20 and the non-clear space area 2a in the direction perpendicular to the opening side, so that the single-path metal conduction band 20 is far away from the metal, thereby optimizing the working performance of the antenna.
  • the dual-band antenna further includes a microstrip line 40, which is arranged in the non-clear space area 2a, and the excitation end of the single-path metal conduction band 20 is electrically connected to the microstrip line 40, thereby passing The microstrip line 40 is connected to a radio frequency chip or other devices.
  • the dual-band antenna further includes a test connection part, the test connection part and the capacitor 30 are connected in series with the single-path metal conduction band 20, and the test connection part is arranged near the excitation end of the single-path metal conduction band 20 .
  • the test connection part is a resistor, and the resistance of the resistor is zero.
  • the test connection terminal is formed by the resistance, which is used to test the dual-frequency antenna.
  • the dual-frequency antenna can achieve dual-frequency resonance through only one metal conduction band series capacitor 30, which solves the problem of large space, large size, and cumbersome adjustment of the resonance frequency caused by the multi-branch multi-path structure in the prior art. problem.
  • Fig. 2 is the return loss curve of the dual-frequency antenna in the specific embodiment of the utility model
  • Fig. 3 is the specific embodiment of the application Schematic diagram of the efficiency of the dual-band antenna.
  • the above-mentioned structure can achieve good electrical performance of the dual-band antenna in the 2.4GHz-2.5GHz frequency band and the 5GHz-5.8GHz frequency band.
  • the dual-band antenna provided by the present application has an efficiency of more than 80% in the frequency band of 2.4 GHz to 2.5 GHz, and an efficiency of more than 40% in the frequency band of 5 GHz to 5.8 GHz.

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Abstract

本申请公开了一种双频天线，包括：PCB板，所述PCB板设置有净空区和非净空区；单路径金属导带，所述单路径金属导带布设在所述净空区内，并且所述单路径金属导带的末端电连接所述PCB板的接地端；电容，所述电容连接在所述单路径金属导带的激励端和末端之间。双频天线仅通过一条金属导带串联电容即可实现双频谐振，规避现有技术中多分支多路径结构造成的占用空间大、尺寸较大，调节谐振频段繁琐的问题。

Description

一种双频天线
本申请要求于2019年01月28日提交中国专利局、申请号为201920139308.2发明名称为“一种双频天线”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及无线局域网技术领域，特别是涉及一种双频天线。
背景技术
在当前的天线中，通常通过多分支导线实现双频谐振，这种结构的天线走线布置占用的PCB(Printed Circuit Board印制电路板)的空间较大，导致天线的整体尺寸偏大，无法满足小型化设计，并且，采用多分支导线实现的双频谐振的天线的谐振频段调节繁琐。
基于此，本领域技术人员亟待对双频天线进行优化设计，提供一种尺寸小且便于谐振频段调节的双频天线。
发明内容
本申请实施例的目的在于提供一种双频天线，该双频天线仅通过一条金属导带串联电容即可实现双频谐振，可以解决多分支多路径结构造成的占用空间大、尺寸较大，调节谐振频段繁琐的问题。具体技术方案如下：
本申请实施例提供了一种双频天线，该双频天线包括：
PCB板，PCB板设置有净空区和非净空区；
单路径金属导带，单路径金属导带布设在净空区内，并且单路径金属导带的末端电连接PCB板的接地端；
电容，电容连接在单路径金属导带的激励端和末端之间。
可选地，双频天线包括多个电容，并且，多个电容串联在单路径金属导带上。
可选地，净空区设置在PCB板的一边缘处，并单路径金属导带的末端和激励端位于偏向净空区的开口侧。
可选地，双频天线还包括微带线，微带线布设在非净空区，单路径金属导带的激励端电连接微带线。
可选地，双频天线还包括：
测试连接部，测试连接部与电容串联在单路径金属导带上，并设置在靠近单路径金属导带的激励端。
可选地，测试连接部为串联在单路径金属导带的电阻，电阻的阻值为零。
可选地，单路径金属导带呈堆叠往复状布设在净空区内。
由上可见，基于上述的实施例，一种双频天线，该双频天线包括PCB板、单路径金属导带和电容。PCB板设置有净空区和非净空区，其中，PCB板上未敷设金属或导线等区域形成净空区，其外为非净空区。单路径金属导带指的是一条金属导带，没有分支仅形成一条路径。单路径金属导带布设在净空区内，其单路径金属导带的末端电连接PCB板的接地端形成环路天线，如此，可实现双频天线的高频谐振。电容连接在单路径金属导带的激励端和末端之间，从而可实现双频天线的低频谐振。
与通过多分支金属导带实现双频相比，该双频天线通过单路径金属导带和电容即可实现双频谐振，结构简单，并且，通过调节单路径金属导带的长度和净空区的面积即可调节高频谐振，通过调节电容的电容值即可调节低频谐振，有效简化了天线的谐振调节工作。
附图说明
为了更清楚地说明本申请实施例和现有技术的技术方案，下面对实施例和现有技术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申请的一些实施例，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为本申请具体实施例中双频天线的结构示意图；
图2为本申请具体实施例中双频天线的回波损耗曲线；
图3为本申请具体实施例中双频天线的效率示意图。
附图标记：10PCB板、20单路径金属导带、21末端、22激励端、30电 容、40微带线、1a净空区、2a非净空区。
具体实施方式
为使本申请的目的、技术方案、及优点更加清楚明白，以下参照附图并举实施例，对本申请进一步详细说明。显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，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，都属于本申请保护的范围。
为了详细说明本申请提供的双频天线。下面结合附图对该双频天线的结构及工作原理进行详细说明。
如图1所示，该图为本申请具体实施例中双频天线的结构示意图。
在一种具体实施例中，本申请提供一种双频天线，该双频天线包括PCB板10、单路径金属导带20和电容30。如图1所述，PCB板10设置有净空区1a和非净空区2a，其中，PCB板10上未敷设金属或导线等区域形成净空区1a，其外为非净空区2a。单路径金属导带20指的是一条金属导带，没有分支仅形成一条路径。单路径金属导带20布设在净空区1a内，其单路径金属导带20的末端电连接PCB板10的接地端形成环路天线，如此，可实现双频天线的高频谐振。电容30连接在单路径金属导带20的激励端和末端之间，从而可实现双频天线的低频谐振。
与通过多分支金属导带实现双频相比，该双频天线通过单路径金属导带20和电容30即可实现双频谐振，结构简单。
其中，通过调节单路径金属导带20的长度和净空区1a的面积即可调节高频谐振。具体地，在净空区1a面积不变、通过增大单路径金属导带20的长度可调节高频谐振，例如，当单路径金属导带20的末端21和激励端22保持不变，增大单路径金属导带20的长度，该单路径金属导带20呈波浪状设置或者呈其他堆叠往复的布设在净空区1a内均可调节高频谐振。
通过调节电容30的电容值可调节低频谐振，根据所需的低频谐振点而设置电容30的电容值，以满足不同低频谐振点的要求，有效简化了天线的谐振调节工作。
进一步地，该双频天线包括多个电容30，并且多个电容30串联在单路径金属导带20上。
在具体实施例中，如图1所示，在单路径金属导带20上串联三个电容30。优选采用多个电容30串联，能够精准地调节低频谐振，可靠实现微调，充分满足对低频谐振点的要求。
如图1所示，净空区1a设置在PCB板10的一边缘处，并且，单路径金属导带20的末端和激励端位于偏向净空区1a的开口侧，如此设置，能够增大单路径金属导带20与非净空区2a在垂直开口侧方向的距离，从而使得单路径金属导带20远离金属，进而优化天线的工作性能。
在图1中，仅示出净空区1a的一种具体的形状，净空区1a的形状并不仅限于图中的方形，还可以为半圆形、不规则形状等，只需能够充分利用PCB板10，优化净空区1a的利用率即可。
进一步地，如图1所示，该双频天线还包括微带线40，微带线40布设在非净空区2a，其单路径金属导带20的激励端电连接微带线40，从而通过该微带线40与射频芯片或其他器件连接。
基于上述各实施例，该双频天线还包括测试连接部，测试连接部与电容30串联在单路径金属导带20上，并且，该测试连接部设置在靠近单路径金属导带20的激励端。
在具体实施例中，该测试连接部为电阻，并且该电阻的阻值为零。通过电阻形成测试的连接端，用于对该双频天线进行测试。
基于上述结构设置，该双频天线仅通过一条金属导带串联电容30即可实现双频谐振，解决现有技术中多分支多路径结构造成的占用空间大、尺寸较大，调节谐振频段繁琐的问题。
下面结合图2和图3对本申请具体实施例中的双频天线的性能进行说明，图2为本实用性新型具体实施例中双频天线的回波损耗曲线；图3为本申请具体实施例中双频天线的效率示意图。
如图2所示，通过上述结构可以实现双频天线在2.4GHz～2.5GHz频段、在 5GHz～5.8GHz频段的电性能良好。如图3所示，本申请提供的双频天线在2.4GHz～2.5GHz频段的效率可达到80％以上，在5GHz～5.8GHz频段的效率可达到40％以上。
需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
以上所述仅为本申请的较佳实施例而已，并不用以限制本申请，凡在本申请的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本申请保护的范围之内。

Claims (7)

  1. 一种双频天线，其特征在于，所述双频天线包括：
    PCB板，所述PCB板设置有净空区和非净空区；
    单路径金属导带，所述单路径金属导带布设在所述净空区内，并且所述单路径金属导带的末端电连接所述PCB板的接地端；
    电容，所述电容连接在所述单路径金属导带的激励端和末端之间。
  2. 根据权利要求1所述的双频天线，其特征在于，所述双频天线包括多个所述电容，并且，多个所述电容串联在所述单路径金属导带上。
  3. 根据权利要求1所述的双频天线，其特征在于，所述净空区设置在所述PCB板的一边缘处，并所述单路径金属导带的末端和激励端位于偏向所述净空区的开口侧。
  4. 根据权利要求1所述的双频天线，其特征在于，所述双频天线还包括微带线，所述微带线布设在所述非净空区，所述单路径金属导带的激励端电连接所述微带线。
  5. 根据权利要求1-4任一项所述的双频天线，其特征在于，所述双频天线还包括：
    测试连接部，所述测试连接部与所述电容串联在所述单路径金属导带上，并设置在靠近所述单路径金属导带的激励端。
  6. 根据权利要求5所述的双频天线，其特征在于，所述测试连接部为串联在所述单路径金属导带的电阻，所述电阻的阻值为零。
  7. 根据权利要求1所述的双频天线，其特征在于，所述单路径金属导带呈堆叠往复状布设在所述净空区内。
PCT/CN2019/129245 2019-01-28 2019-12-27 一种双频天线 WO2020155986A1 (zh)

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CN117134107A (zh) * 2022-05-20 2023-11-28 华为技术有限公司 天线、电路板及电子设备

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