Influence of amplitude distribution within a module and over a system of modules on the pattern of multimodule antenna array

Numerical simulation results for multimodule antenna array in form of linear array consisting of rectangular subarrays (modules) are given. It´s shown that grating lobes appear in the array factor if the amplitude distribution within a module and within a system of modules are independent from each other. The dependence of grating lobes level on amplitude distribution parameters is considered.