新型S波段宽频微带天线阵研究

Research on Wideband Microstrip Antenna Array at S-band Communication

微带天线是一种小型化、低剖面、可共形天线,研究了采用双层双排平行放置贴片形式的二元微带贴片天线阵,通过缝隙耦合的馈电形式,可实现S波段宽频带通信技术要求。给出了此类天线的设计方法,讨论了基片厚度对天线辐射特性的影响;通过基于时域有限积分法的CST软件包仿真计算,得到该天线端口反射系数小于-10dB(VSWR<2)的相对带宽为24%,满意的方向图带宽和增益特性,理论计算结果与实测值保持一致,验证了这种结构天线较好的实际应用性能。

Microstrip antenna is one of miniaturization, low section and conformal antenna. In this paper, microstrip antenna array with two layers two double sets structure is researched. By aperture-coupled feeding, this antenna can realize S-band wide band communication. The design method was presented and the influence of substrate thickness to radiation character was discussed. Simulation results based on CST software package with FIID showed that the relative bandwidth with return loss less than - 10dB can get 24% , and the radiation pattern bandwidth and gain character was satisfied. Good agreement has been got between simulation and experimental results, and this design can meet expected performance for practical application.