均匀线性阵列当阵元间距大于波长的一半时 时，会出现栅瓣，导致空间模糊。类似于时域滤波，天线方向图是最优权的傅立叶变换-Uniform linear array when the array element spacing is greater than half the wavelength　time to time, there will be a gate valve, resulting in blurred space. Similar to the time-domain filtering, the antenna pattern is the Fourier transform of the optimal weight