基于真实时间延迟技术的相控阵宽带抗干扰方法研究

提出了一种基于真实时间延迟技术的相控阵宽带抗干扰方法,在阵列的边缘增加接负载的单元,减少阵列边缘的截断效应,使用阵中的单元方向图替代普通方法的点源进行低副瓣设计,减少设计的波束形状与实际阵列波束的误差。最后使用真实时间延迟器件替代普通相控阵的移相器进行波束扫描控制,提高相控阵的宽带抗干扰能力。使用该方法设计了一个9～11GHz的1×32直线阵,仿真得到阵列具有-30 dB的副瓣电平,在扫描到40°时,整个频段时的波束指向一致。

A phased array wideband anti-interference method based on real time delay technology is presented in this paper. The method is described as follows： Firstly, increasing the antenna elements connected load at the edge of the antenna array to reduce the truncation effect. Then, the low sidelobe design be made by using element pattern in the center of the antenna array to replace a point source, which can reduce the difference between the designed bean shape and the actual array beam shape. Lastly, real time delay de-vices are used to replace phase shifter, which can improve the capacity of the array wideband anti-interference. In order to validate the proposed method, a linear array of 1×32 which works at 9～11 GHz is designed. The designed array has a -30 dB sidelobe level. When scanning to 40°, there is the same beam direction in the whole frequency band.