Multisolver Domain Decomposition Method for Modeling EMC Effects of Multiple Antennas on a Large Air Platform

Abstract

We proposed herein a multisolver domain decomposition method (MS-DDM), and applied it to compute the isolations among multiple antennas mounted on a large air platform at X -band frequency. The fundamental strategy of the proposed MS-DDM is to decompose the entire computational domain into many subregions based on the local material properties and geometrical features. Subsequently, we employ the most suitable computational electromagnetic (CEM) technique for each of the subregions. Moreover, the coupling between well-separated subregions is implemented through Stratton-Chu representation formulas. However, for the touching interfaces between neighboring subregions, a Robin transmission condition is introduced to mitigate the troublesome self-integral terms with weak singular kernels. The proposed MS-DDM is, therefore, well suited for modeling multiple antennas conformally mounted on a large platform, where touching subregions are usually unavoidable. Furthermore, by using the proposed MS-DDM framework, multiple existing CEM solvers have been successfully integrated with few minor modifications.