A Wideband Characteristic Modes Analysis Method based on Frequency and Material Independent Reactions

A novel matrix generation technique for method of moments (MoM) based on Taylor expansion method is proposed. A geometrically dependent preprocessing matrix is formed by extracting frequency-independent terms through Taylor expansion of Green's function. During the computation of wideband frequencies, the impedance matrix is efficiently derived by multiplying the pre-determined matrix with the propagation constant, significantly enhancing the matrix's computational effectiveness. The method is applied to the characteristic mode analysis.