基于极化状态配置的宽带相控阵极化控制方法

传统的固定极化状态存在交叉极化隔离度低且有效的扫描角度范围窄等问题,制约了相控阵雷达中极化信息的充分利用.为提高交叉极化隔离度,并解决宽带相控阵中波束方向图畸变问题,提出一种基于极化状态配置方法的宽带相控阵极化方向图综合方案.通过优化不同波束指向的极化状态,并利用有限长单位冲激响应(finite impulse res...

Polarization control method for wideband phased array based on polarization state configuration

The traditional fixed polarization state has the problems of low cross polarization isolation and narrow effective scanning angle range, which restricts the full utilization of polarization information in phased array radar. In order to improve the cross polarization isolation and solve the problem of beam pattern distortion in broadband phased array, a polarization pattern synthesis scheme of broadband phased array based on polarization state configuration method is proposed. By optimizing the polarization states of different beam directions and using finite impulse response(FIR) digital filter, a broadband array pattern synthesis model is established to control the polarization pattern. Simulation results show that this method can effectively reduce the frequency response of main polarization and cross polarization patterns, and suppress the side lobe and cross polarization level of main polarization. Keeping the cross polarization isolation of broadband phased array at a high level in the wide-angle scanning range can meet the index requirements of practical polarization phased array applications.