CN107275771A - 一种六单元微带准八木天线 - Google Patents

一种六单元微带准八木天线 Download PDF

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Publication number
CN107275771A
CN107275771A CN201710448133.9A CN201710448133A CN107275771A CN 107275771 A CN107275771 A CN 107275771A CN 201710448133 A CN201710448133 A CN 201710448133A CN 107275771 A CN107275771 A CN 107275771A
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Prior art keywords
antenna
quasi
medium substrate
active dipole
passive
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CN201710448133.9A
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赵惠昌
黄晓丽
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Nanjing University of Science and Technology
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Nanjing University of Science and Technology
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    • 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
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
    • H01Q19/18—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/28—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of two or more substantially straight conductive elements
    • H01Q19/30—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of two or more substantially straight conductive elements the primary active element being centre-fed and substantially straight, e.g. Yagi antenna

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  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

本发明公开一种六单元微带准八木天线，包括介质基板(1)、贴覆于介质基板(1)上表面的天线贴片(2)和满贴于介质基板(1)下表面的反射单元层(3)，所述天线贴片(2)包括以共同的馈电点(4)为中心，周向均匀排列的6个天线单元。本发明的六单元微带准八木天线，用于K波段，为毫米波天线，其增益大，且前倾向20°方向上实现了最大辐射。

Description

一种六单元微带准八木天线
技术领域
本发明属于毫米波天线技术领域，特别是一种易于生产加工的高水位挡水装置。
背景技术
准八木天线与传统的八木天线结构类似，都是由一根有源振子、反射器和若干无源振子组成。有源振子通常为半波长的偶极子或折合偶极子；无源振子由若干根比有源振子短的引向器组成，同时引向器也是一个输入阻抗匹配元件；反射器在有源振子的背面，通常为部分接地结构。有源振子，引向器和反射器互相平行。准八木天线与传统八木天线最大的不同就是用微带接地板替代了振子反射器。
现有的准八木天线如中国发明专利申请“一种新型高增益印刷准八木天线”(申请号：201510486962.7，公开日：2015.12.09)所述，其包括介质基板、反射器、正面长条形馈线、背面矩形馈线、背面长条形馈线、两个有源振子臂和三个引向振子，反射器印刷在介质基板正面的下部，三个引向振子有上至下依次印刷在介质基板正面的上部，两个有源振子臂呈一字型印刷在介质基板的中部，位于左侧的有源振子臂的右端通过正面长条形馈线与反射器的抛物线边的中部连接。
上述准八木天线存在的问题是：该天线用于S波段，频率较低，天线的高增益方向很局限，只在单一方向实现最大辐射而非多个方向。
发明内容
本发明的目的在于提供一种六单元微带准八木天线,用于K波段，为毫米波天线，其增益大，且前倾向20°方向上实现了最大辐射。
实现本发明目的的技术解决方案为：
一种六单元微带准八木天线，包括介质基板1、贴覆于介质基板1上表面的天线贴片2和满贴于介质基板1下表面的反射单元层3，所述天线贴片2包括以共同的馈电点4为中心，周向均匀排列的6个天线单元。
优选地，所述每个天线单元包括无源引向单元21、有源振子22、相位反射器23、阻抗匹配线24和微带线25；所述相位反射器23、阻抗匹配线24和微带线25沿径向排列，微带线25一端与馈电点4相连，另一端与阻抗匹配线24的一端相连，所述相位反射器23一端与阻抗匹配线24的另一端相连，其另一端与法向排列的有源振子22相连，所述无源引向单元21与有源振子22平行排列，位于有源振子22与阻抗匹配线24相对的另一侧。
本发明与现有技术相比，其显著优点为：
该天线工作带宽为23.89GHz～24.26GHz，可用于K波段，增益大，前倾向上实现最大辐射。天线的最高增益值为11.23dB，波束倾向角为20°，半功率波束宽度为23°。
下面结合附图和具体实施方式对本发明作进一步的详细描述。
附图说明
图1为本发明六单元微带准八木天线的俯视图。
图2为图1中一个天线单元的俯视图。
图3为本发明实施例的回波损耗仿真结果。
图4为本发明实施例的驻波比仿真结果。
图5为本发明实施例的增益图仿真结果。
图6为本发明实施例的方向图仿真结果。
图中，介质基板1，天线贴片2，反射单元层3，无源引向单元21，有源振子22，相位反射器23，阻抗匹配线24，微带线25。
具体实施方式
如图1所示，本发明六单元微带准八木天线，包括介质基板1、贴覆于介质基板1上表面的天线贴片2和满贴于介质基板1下表面的反射单元层3，所述天线贴片2包括以共同的馈电点4为中心，周向均匀排列的6个天线单元。
如图2所示，
所述每个天线单元包括无源引向单元21、有源振子22、相位反射器23、阻抗匹配线24和微带线25；
所述相位反射器23、阻抗匹配线24和微带线25沿径向排列，微带线25一端与馈电点7相连，另一端与阻抗匹配线24的一端相连，所述相位反射器23一端与阻抗匹配线24的另一端相连，其另一端与法向排列的有源振子22相连，所述无源引向单元21与有源振子22平行排列，位于有源振子22与阻抗匹配线24相对的另一侧。
所述无源引向单元21为一个输入阻抗匹配元件。
所述有源振子22为半波长偶极子，长度大于无源引向单元21。
实施例中，选用厚度为0.254mm，介电常数为2.18的Ro5880材料为介质基板加工而成。无源引向单元的长为4.56mm,宽为0.91mm；有源振子长为4.1mm,宽为0.91mm；无源引向单元与有源振子之间的距离为1.6mm；阻抗匹配线长为2.27mm，宽为0.57mm；微带线长为2.25mm，宽为0.7mm，具体模型如图2所示。仿真结果如图3-6所示，图3是天线的回波损耗，图4是天线驻波比，可以得出在23.89GHz～24.26GHz范围内，天线的S11参数小于-10dB，驻波比小于2，天线工作带宽为370MHz；图5是天线在xoz面与yoz面的方向图仿真结果，图6是天线的三维方向图，天线的最高增益值为11.23dB，波束倾向角为20°，半功率波束宽度为23°。

Claims (4)

1.一种六单元微带准八木天线，其特征在于：
包括介质基板(1)、贴覆于介质基板(1)上表面的天线贴片(2)和满贴于介质基板(1)下表面的反射单元层(3)，所述天线贴片(2)包括以共同的馈电点(4)为中心，周向均匀排列的6个天线单元。
2.根据权利要求1所述的准八木天线，其特征在于：
所述每个天线单元包括无源引向单元(21)、有源振子(22)、相位反射器(23)、阻抗匹配线(24)和微带线(25)；
所述相位反射器(23)、阻抗匹配线(24)和微带线(25)沿径向排列，微带线(25)一端与馈电点(4)相连，另一端与阻抗匹配线(24)的一端相连，所述相位反射器(23)一端与阻抗匹配线(24)的另一端相连，其另一端与法向排列的有源振子(22)相连，所述无源引向单元(21)与有源振子(22)平行排列，位于有源振子(22)与阻抗匹配线(24)相对的另一侧。
3.根据权利要求2所述的准八木天线，其特征在于：
所述无源引向单元(21)为一个输入阻抗匹配元件。
4.根据权利要求3所述的准八木天线，其特征在于：
所述有源振子(22)为半波长偶极子，长度大于无源引向单元(21)。
CN201710448133.9A 2017-06-14 2017-06-14 一种六单元微带准八木天线 Pending CN107275771A (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111819735A (zh) * 2018-01-05 2020-10-23 维斯普瑞公司 混合高增益天线***、设备和方法

Citations (1)

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Publication number Priority date Publication date Assignee Title
CN106785482A (zh) * 2017-01-05 2017-05-31 华侨大学 一种基于反射器变形结构的小型化准八木天线

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
CN106785482A (zh) * 2017-01-05 2017-05-31 华侨大学 一种基于反射器变形结构的小型化准八木天线

Non-Patent Citations (1)

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刘楠: "方向图可重构准八木天线的研究", 《中国优秀硕士学位论文全文数据库》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111819735A (zh) * 2018-01-05 2020-10-23 维斯普瑞公司 混合高增益天线***、设备和方法
CN111819735B (zh) * 2018-01-05 2021-11-16 维斯普瑞公司 混合高增益天线***、设备和方法

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