光控平面阵列建模与计算机仿真

Modeling and Computer simulation for OCPPA

光延时相控阵能够明显地改善普通相控阵雷达系统的带宽,然而大多数的研究和实验系统均基于光控线阵,故对光控面阵的分析和研究有着重大的现实意义。针对在平面阵列的行、列上中同时使用子阵延时、单元移相的光延时波控技术的二维扫描光控面阵,建立了光控平面阵列的数学模型,通过该数学模型完成了光控平面阵列方向图及其在不同的子阵划分和不同指向角下的计算机仿真,仿真结果表明光控平面阵的行、列子阵划分方式和指向角对阵列带宽均存在重大影响,这为进一步研究光控平面阵列奠定了重要基础。

By using optical true time delay, the instantaneous bandwidth of phased array radar can be improved distinctly. But most researches and experiments were carried out with linear array, so it＇ s very important to study or analyze OCPPA. For planar OCPPA, in this paper, in which rows and columns jointly use time-delay at subarray and phase-shift at antenna element, a model is built. Based on the model, the pattern simulations for OCPPA are done by computer at various partitions of subarray and scan angles. The simulation results indicate that the simultaneous bandwidth of OCPPA is affected by subarray partition and scan angle.