A scheme is presented by applying parallel FDTD method based on MPI to analyze the radiation problems of the airborne antennas accurately and quickly,which is a full-wave numerical method.The computation space is divided into some sub-domains,then the computation resource is expanded by MPI parallel platform and a divide-and-conquer approach.The isolation between antennas based on FDTD is computed for avoiding the complexity of sweeping frequency.Numerical results for the radiation patterns and isolation of...