摘要
采用双层介质双贴片结构展宽天线的阻抗带宽 ,并利用小的贴片电容补偿由厚介质衬底引起的探针电感效应 ,进一步扩展了频带宽度。基于共形FDTD法结合圆柱分层媒质中并矢格林函数的新方法 ,对此类天线的近场和远场特性进行了严格的全波分析。提出了系统的设计流程 ,使得天线的设计过程变得简单易行。设计和仿真结果表明 ,在不增加剖面厚度的情况下 ,工作于L和C波段的天线带宽(VSWR≤ 2 .0 )可达近 30 %甚至更宽。
A novel type of wideband cylindrically conformal microstrip antenna is presented. We use the stacked structure to extend the impedance bandwidth of the antenna. The inductive effect of the feeding probe due to the thick dielectric substrate is compensated through adding a small capacitive patch so that the bandwidth is further broadened. Full-wave analysis of this antenna is implemented based on the new method that combines the conformal FDTD method and the dyadic Green's functions for cylindrically stratified media. A systematic scheme is outlined to simplify the design procedure. The results of design and computer simulation demonstrate that about 30% or more impedance bandwidth (VSWR≤2.0) of the antenna operating at L and C band can be achieved without increasing the thickness of the profile.
出处
《电波科学学报》
EI
CSCD
2004年第1期27-31,57,共6页
Chinese Journal of Radio Science
基金
博士点专项基金资助项目 (2 0 0 10 0 0 70 12 )
