有源相控阵天线瞬时宽带性能改善研究
Instantaneous Broadband Performance Improvement of Active Phased Array Antenna
  
DOI:
中文关键词:  有源相控阵天线,瞬时带宽,实时延迟线
英文关键词:active phased array antenna, instantaneous bandwidth, true time delay line
基金项目:
作者单位
黄志强1,2孙庆锋1,2 1. 南京国睿防务系统有限公司,南京 210039
 2. 中国电子科技集团公司第十四研究所,南京 210039 
摘要点击次数: 47
全文下载次数: 0
中文摘要:
      采用无色散特性的模拟或数字移相器会导致天线波束指向随频率发生变化,即相控阵天线的孔径效应。工程上一般在子阵级别上采用色散特性的实时延迟线拓展相控阵天线瞬时带宽,但是子阵级延时量化误差会产生周期性栅瓣,导致天线副瓣性能恶化。文中提出在通道(或多通道收发组件)上设置小位延迟线、与子阵级大位延时线叠加使用,消除或改善子阵级延时误差造成的性能恶化。结合X波段有源二维阵列天线,对单元级、子阵级、子阵+单元两级三种情况进行了仿真。仿真结果表明,子阵+单元两级延时方法在扩展相控阵天线瞬时带宽的同时,能明显改善相控阵天线的副瓣特性,且具有较强的工程可实现性。
英文摘要:
      The analog or digital phase shifters without dispersion characteristics will cause the antenna beam direction change with the frequency, viz. , the aperture effect of the phased array antenna. In engineering the instantaneous bandwidth of phased array antenna can be expanded by using the real-time delay line with dispersion characteristics at the subarray level, but the delay quantification error at the subarray level will produce periodic grating lobe, which will lead to the deterioration of the performance of the antenna sidelobe. In this paper, it is proposed that the small bit delay line be set on the channel (or multi-channel T/ R unit) and superimposed with large bit delay line at the subarray level, to eliminate or improve the delay error at the subarray level. In this paper, combined with X-band active two-dimensional array antenna, three cases of element level, subarray level and subarray+element level are simulated. The simulation results show that the subarray+element two-stage delay method can obviously improve the sidelobe characteristics of the phased array antenna while expanding the instantaneous bandwidth of the phased array antenna, and the method has a strong engineering feasibility.
查看全文  查看/发表评论  下载PDF阅读器
关闭