Predicting isolation between airbornre antennas using equivalent models

In this paper, an effective method is presented for predicting the isolation between airborne antennas without knowing their detailed geometry and media information. Equivalent models requiring merely radiation patterns were employed in this method. However, they cannot provide effective port (terminal) and phase information which is crucial to the isolation calculation. In order to fill the gaps, the reaction theorem proposed by Richmond was employed as well as several approximations, which enable the calculation of isolation without knowing the phase and designating the port of the equivalent model. Numerical results showed the efficacy of the proposed method. In addition, the proposed method avoids direct modeling of airborne antenna and needs only one run of calculation, which largely saves the computation and storage costs.