Application Of Synthetic Basis Functions And Generalized Transition Matrix To Electromagnetic Radiation Of Wire And Plate Structure Antennas

To improve the numerical methods on electromagnetic radiation problems is always the research hotspot in computational electromagnetics. To efficiently analyze the radiation of large-scale antennas and large-scale array antennas, it is significant to extract the radiation characteristics of the radiator effectively and use reduced information to achieve the accurate results. The large-scale wire-to-plate antennas are widely used in paracitce, such as airborne wire antennas, vehicle-borne wire antennas, dipole phased array antennas, the efficient computation of electromagnetic radiation for these antennas is the main work of this paper.In radiation of wire antenna, this paper discusses the conventional MoM in detail. We propose to generate the generalized transition matrix (GTM) of the wire antenna and using the GTM to calculate the radiation fields of the far point, it can compress the electromagnetic information and reduce the comupating sources, Numerical results shows that it is possible to apply GTM method to analyze complex structures consisting of many wires and large-scale antenna arrays with domain decomposition method.We improve the method of synthetic basis functions (SBF), which is based on the conventional method of moments (MoM), to analyze the radiation problems of the large scale wire-to-plate antenna arrays, the concept of the unequal solution spaces accounting for the unequal excitation sources is proposed in this paper. The method can extract radiation characteristic from the solution space of the unequal spaces as SBFs, which are generated from the corresponding excitation sources, as in large-scale radiator array radiation problems, the SBF linear system has less number of unknowns than the conventional SBF method, thus leading to higher efficiency in numerical computation.