Simulating Large Complex Antenna Arrays by an Efficient Technique based on DDM (Invited)

In this work, a novel technique based on hybrid finite element-boundary element-domain decomposition method (FEM-BEM-DDM) is presented to solve large complex antenna arrays. In large-scale arrays, elements can be classified into different types based on their characteristics or properties. According to array elements’ types. a comprehensive database of self-coupling and mutual-coupling impedance information for each type of element is constructed by FEM-BEM-DDM, then the system impedance matrix can be efficiently obtained by these information. In other words, the self-coupling impedance information and mutual coupling impedance information of a limited number of array elements are sufficient to describe the system impedance matrix of the entire large-scale array. Additionally, the impedance matrix of each type of array element only needs to be inverted once during the inner iteration process. Once the impedance matrix is inverted, its inverse matrix can be reused in subsequent iterations without the need for recalculation. This reduces computational complexity and improves efficiency.