一种加载耦合金属板的宽带蝶形天线的设计  

Design of a broadband bow-tie antenna with coupled metal plates

作　　者：林月茹 林文斌[1] Lin Yueru;Lin Wenbin(Institute of Electromagnetic Field and Microwave Technology,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学电磁场与微波技术研究所,成都610031

出　　处：《电子测量技术》2020年第6期15-20,共6页Electronic Measurement Technology

基　　金：国家自然科学基金(11847307)项目资助。

摘　　要：设计了一种加载耦合金属板的宽带蝶形天线,该天线应用了4个独立放置的金属板来增大天线的带宽和增益,并采用折叠型反射板以获取稳定的辐射方向图和较平坦的增益曲线。金属板围绕天线的辐射器,与辐射器耦合,使天线产生了新的谐振频率点,从而改善天线在工作频带内的阻抗特性。反射板采用折叠的形式,不仅能有效抑制旁瓣,还能达到改善高频处的增益的目的。通过HFSS软件对天线进行仿真,得到天线的结构参数,并分析引入结构对天线性能的影响。仿真结果表明,天线尺寸为42 mm×29 mm×23.6 mm,当S11≤-10 dB,天线工作频段为2.35~4.52 GHz,相对带宽为63.2%,增益为4.4~6.45 dBi。A broadband bow-tie antenna with coupled metal plates was designed.The antenna applied a simple structure consisting of four metal plates placed independently to increase the bandwidth and gain of the antenna,and a folded reflector for a stable radiation pattern and a flatter gain curve.The metal plate surrounded the radiator of the antenna and coupled with the radiator,which caused the antenna to generate a new resonant frequency point,thereby improving the impedance characteristics of the antenna in the operating frequency band.The reflector was in the form of a fold,which not only effectively suppressed the side lobes,but also achieved the purpose of improving the gain at high frequency.The antenna was simulated by HFSS to obtain the structural parameters,and the influence of the introduced structure on the performances of the antenna was analyzed.The simulation results show that the size of the antenna is 42 mm×29 mm×23.6 mm.When S11≤-10 dB,the frequency channels of the antenna are within 2.35~4.52 GHz,and the relative bandwidth is 63.2%.Moreover,the gain is 4.4~6.45 dBi.

关 键 词：蝶形天线 宽带 耦合金属板 折叠型接地板 S11 增益 

分 类 号：TN82[电子电信—信息与通信工程]