Efficient computation of in-situ antenna performance using platform characteristic modes

We present a new approach for efficiently computing in-situ performance of platform-mounted antennas. When the antenna-platform system is characterized by the electric field integral equation (EFIE), the moment method (MoM) can be used to analyze the coupled system. To accelerate the solution, the numerical Green's function (NGF) of the antenna is used via a simple matrix manipulation. We next compress the platform sub-matrix using the radiation and mutual coupling modes of the antenna-platform system. This new approach results in a fast and accurate solution of the coupled system. The computational savings and efficiency of the proposed method is particularly beneficial for design and optimization of antennas on-board real-life platforms.