【摘要】 在基于均匀幅度加权模型完成波束偏转时,参量阵差频波存在波瓣展宽以及生成高强度旁瓣与栅瓣的问题。首先通过理论仿真及实验测试,对该加权模式下的差频波波束合成结果以及旁瓣与栅瓣的抑制情况进行了分析;然后提出了基于道尔-切比雪夫幅度加权模型的相控参量阵波束赋形方法,通过仿真分析与实验测试,发现道尔-切比雪夫幅度加权模型比均匀幅度加权模型具有更好的旁瓣抑制能力。采用该方式生成的差频波波束宽度在不同偏转角下均有明显减小;主瓣与栅瓣强度差值增加,栅瓣得到有效抑制。该方法的提出对于提高相控参量阵波束质量具有积极意义。更多还原

【Abstract】 When the equal amplitude weighting model is adopted in the beam steering process,the difference frequency wave of phased parametric array has the problems of beam lobe broadening and generating high intensity grating lobe and side-lobe. To solve these problems,firstly,through theoretical simulation and experiment test this paper analyzes the beam forming results of difference frequency wave and the inhibiting ability for grating lobe and side-lobe in equal amplitude weighting mode. And then,the beam shape designing method for phased parametric array based on Doyle-Chebyshev amplitude weighting model is proposed. Through simulation analysis and experiment test it is found that the Doyle-Chebyshev amplitude weighting model has better side-lobe inhibiting ability than the equal amplitude weighting model. The beam width of the generated difference frequency wave obviously is reduced for different steering angles. The intensity difference between the main-lobe and grating lobe is increased,which means the grating lobe has been effectively inhibited. The method proposed in this paper has a positive effect on the quality improvement of the phased parametric array beam forming.更多还原