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在一个各向同性单元组成的、间距按正弦规律分布的对称阵上,利用有基的余弦锥削振幅分布可产生副瓣电平为-33分贝的窄波束。若保持这个振幅分布不变,通过叠加一个非线性相位分布则可把这个窄波束变换成一个指定宽度的扇形波束,这个非线性相位分布可用固定相位法求解。本文试图研究单元间距按正弦规律变化对对称阵上所要求的波束形状的影响,同时给出了该阵及有同样单元数的等间距阵的辐射方向图。
On a symmetric array of isotropic cells with sinusoidal regular spacing, a narrow-beam with a sidelobe level of -33 dB can be generated using a base cosine cone amplitude distribution. If this amplitude distribution is kept constant, this narrow beam can be transformed into a fan beam of a specified width by superimposing a non-linear phase distribution. This non-linear phase distribution can be solved by the fixed phase method. This paper attempts to study the influence of sinusoidal regularity of cell spacing on the beam shape required by a symmetric array. At the same time, the radiation patterns of the array and the equally spaced arrays with the same number of cells are given.