频率分集阵列(Frequency Diverse Array,FDA)是作为一种全新的电扫描雷达体制,其方向图所具有的时间-距离-角度三维相关特性在电子对抗和安全通信等领域有广阔的应用前景.一维均匀线性FDA阵列(Uniform Linear Array Frequency Diverse Array,ULFDA)的发射方向图存在角度-距离耦合问题,针对这一问题,在对称子阵密度锥削阵结构的基础上,通过正弦频控函数取代原有的均匀线性函数,得到了FDA的点状波束指向控制方法.此外,针对FDA方向图的时变问题,得到了基于子阵结构的密度锥削阵sin-FDA主波束在角度维指向固定、距离维变化时的结论.
Research on beam control of density taper array sin-FDA based on subarray structure
Frequency Diverse Array(FDA)is a brand-new electronically scanned radar system.The time-range-angle three-dimensional correlation characteristics of its beampattern have broad application prospects in the fields of electronic counter-measures and security communications.One-dimensional uniform linear FDA array(ULFDA)has the problem of angle-range coupling in the transmit beampattern.To solve this problem,this paper adopts sine based on the symmetrical subarray density taper array structure.The frequency offset obtains the dot-shaped beampattern pointing control method at the target point posi-tion.In addition,we analyze the time-varying problem of the FDA pattern,and get the conclusion that the mainlobe of the density tapered array sin-FDA based on the subarray structure has a fixed direction in the angle dimension and changes in the range dimension.
frequency diverse arraydensity taper arraybeampattern decouplingtime-varyingbeam steering
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