Stochastic Thermal–Structural–Electromagnetic Coupling Analysis of Phased Arrays With Random Material Parameters

A thermal–structural–electromagnetic coupling model through the stochastic perturbation technique (SP-TSE) is proposed to deal with the stochastic analysis of the active phased array antenna (APAA) performance considering random material parameters. First, stochastic perturbation technique is employed to analyze the temperature distribution and thermal deformation of APAA, in which the randomness of both thermal and structural material parameters is considered. Second, without any additional assumptions, the obtained thermal deformation results are directly introduced into the antenna radiation pattern function to analyze the electromagnetic performance (EMP) of APAA. Finally, the effectiveness of the proposed SP-TSE model is fully verified and the results show that this model can obtain very accurate stochastic multiphysics information of APAA and save a huge amount of computational cost compared with the Monte Carlo method.