S波段收发共用高精度延迟线的设计  

Diplex and High Accuracy Design of S-band True Time Delay Module

作　　者：王琦[1] 李树良[1] 李晓鲲 WANG Qi;LI Shuliang;LI Xiaokun(Nanjing Research Institute of Electronics Technology,Nanjing 210039,China)

机构地区：[1]南京电子技术研究所,南京210039

出　　处：《现代雷达》2021年第3期80-84,共5页Modern Radar

基　　金：国家自然科学基金资助项目(61771182);中央高校业务费资助项目(B210202076)。

摘　　要：基于相控阵天线大扫描角和瞬时带宽的需求,为解决孔径渡越时间带来的失真问题,设计一种S波段收发共用高精度延迟线。该延迟线由收发转换开关、六位延迟模块、延迟电缆组件和波控走线板组成,共64种延迟状态实现最大延迟量19.4 ns。采用模块化设计的方式,根据其收发转换模块、小位延迟模块和大位延迟模块各自不同的特点,针对性设计和仿真优化,并通过微组装工艺实现。延长线实测结果如下:所有延迟状态下幅度带内平坦度优于1 dB、延迟相位精度≤±10°、延迟幅度精度≤±0.5 dB,优于应用需求。Based on requirements of large scale scanning steer,instantaneous bandwidth,and improvement of signal distortion causing by aperture crossing for phased array antenna,the technique of S-band diplex and high accuracy design for true time delay(TTD)module is proposed.Utilizing receiving/transmitting switcher,sext-bit delay line,delay module,and logical-driving circuits,total 64 delay states and maximum delay time 19.4 ns is realized.Focused on receiving/transmitting switching,small-scale delay,large-scale delay,simulation validation incorporates with micro-assemble technology,the delay module is guaranteed.For example,a 6-bit 63λdelay module is designed,whose measurement shows amplitude fluctuation is better than 1 dB,delay phase/amplitude accuracy are within±10°and±0.5 dB.

关 键 词：S波段 收发转换 高精度 延迟线 

分 类 号：TN82[电子电信—信息与通信工程]