L波段宽带相控阵天线真延时网络的设计  

Design of a true time delay network for the L-band wideband phased array antenna

作　　者：高浩[1,2] 周以国[1] 郭征[1] 

机构地区：[1]中国科学院电子学研究所,北京100190 [2]中国科学院大学,北京100190

出　　处：《电子元件与材料》2013年第6期14-17,共4页Electronic Components And Materials

摘　　要：论述了宽带相控阵天线渡越时间对天线性能的限制，介绍了消除渡越时间影响的方法，设计了具体的实现方案，即真延时网络，并对该方案进行了仿真和测试。测试结果表明，在1．1～1．5GHz的带宽内，功分器各端口驻波比小于1．22；微带线和同轴线的群时延具有良好的线性规律。该设计可以实现最小步进250ps、最大延迟3750ps的延时，可有效克服渡越时间的不利影响。The restrictions of the wideband phased array antenna （WPAA） transit time on antenna performance were discussed. The method used to eliminate the effect of the transit time was introduced. A concrete realization of the method, that the true time delay（TTD） network, was designed, stimulated and measured. The results show that in the bandwidth of 1.1-1.5 GHz, the VSWR of the respective ports of the power divider are substantially less than 1.22 and the group time delay of the microstrip lines and coaxial lines possess a linear law. This design can achieve a minimum step of 250 ps and the maximum delay of 3 750 ps. The design can be effective to overcome the adverse impact of the transit time.

关 键 词：相控阵天线 真延时网络 功分器 L波段 宽带 仿真 

分 类 号：TN77[电子电信—电路与系统]