紧凑型大频比双频天线的设计

Design of compact dual-band antenna with large frequency ratio

针对2.4/24 GHz双频工业、科学、医学(ISM)波段应用,设计了一种结构紧凑频比可达10的双频天线。通过对圆柱形介质谐振器天线(DRA)进行中间挖空,将介质谐振器天线与法布里-珀罗谐振器天线(FPRA)相结合,实现了天线的双频辐射功能。通过HFSS电磁软件仿真,得到该天线的低频和高频工作频段分别为2.37~2.54 GHz和23.37~24.77 GHz,相对阻抗带宽分别为7.34%和5.83%,实现的最大增益分别为6.8 dBi和9.4 dBi。

For the applications of 2.4/24 GHz dual-band Industry Science Medicine(ISM),a compact dual-band antenna with large frequency ratio reaching 10 is designed.The dual-band radiation function of the antenna was achieved by hollowing out the middle of a cylindrical dielectric resonator antenna(DRA) and combining the dielectric resonator antenna with a Fabry-Perot resonator antenna(FPRA).The low and high operating frequency bands of the antenna were 2.37~2.54 GHz and 23.37~24.77 GHz,respectively.Its relative impedance bandwidths were 7.34 % and 5.83%,respectively.The maximum gains of the antenna were 6.8 dBi and 9.4 dBi,respectively.The above results were obtained by HFSS electromagnetic software simulation.