计算机模拟、实际声呐信号和理论分析证明了在无源声呐中只要信号带宽足够宽(带宽大于1个倍频程),无源声呐中用稀疏阵,即基元间距大于信号波长的基阵,波束图中不会出现栅瓣特性。白化目标信号可满足尽量宽的信号带宽,有利于无栅瓣波束的设计。结论是只要保证足够宽的信号带宽,无源声呐工作频段中最高频率的波长可小于基阵中阵元间隔而可使阵波束特性不出现栅瓣。 Computer simulation, the actual sonar signals and theoretical analysis prove that as long as the signal bandwidth is wide enough (the bandwidth is greater than one octave) in the passive sonar, the sparse array in the passive sonar, that is, the array whose pitch is larger than the signal wavelength, Grating characteristics do not appear in the beam pattern. Whitening the target signal to meet the widest signal bandwidth, is conducive to the design of the grating without grating. The conclusion is that as long as a sufficiently wide signal bandwidth is ensured, the wavelength of the highest frequency in the working frequency band of the passive sonar can be smaller than the array interval in the array, so grating lobes can be prevented from being caused by the array beam characteristics.