Simulation on the electric property of circle parabolic reflector antenna under distortion damage subjected to shock wave

The far field radiation characteristics of circle parabolic reflector subjected to shock wave is studied. The structural damage of the antenna was simulated with LS_DYNA and the distorted antenna models were attained. The far field radiation characteristics of the perfect and distorted antenna model are established and analyzed using the moments method and the method of physical optics based on surface current integration and applying FEKO, the high frequency electromagnetic field analysis model. Comparisons between the electrical performance changes when reflector is perfect and reflector is damaged by shock wave were made. The law of far field radiation characteristics changes with different shock wave values was studied. Results show that it is obvious the gain of the circle parabolic reflector is decreasing with the increasing value of shock wave and the descending amplitude.