Analysis of Scattering Characteristics of Large Array Structures Based on Infinitesimal Dipole Model

This paper proposes a fast and effective method to analyze the scattering characteristics of large array structures based on the infinitesimal dipole model (IDM). Different from the traditional method of analyzing the entire array, this method uses the scattering field of isolated elements to obtain the scattering characteristics of the entire array structure. The characteristic weight coefficient (CWC) that characterizes the scattering characteristics of the isolated element is derived. Based on the IDM, the mutual coupling effect between elements is characterized, and the actual excitation coefficient of each element in the array environment is obtained. The proposed method can handle the scattering problem of large array structures. Due to using infinitesimal dipoles instead of traditional mesh analysis, the computational complexity is significantly reduced and more suitable for analyzing large arrays. The correctness and effectiveness of the proposed method are verified through numerical examples and experiments.