Radiation characteristics of a reflector antenna under shock wave loading

In this paper, the radiation characteristics of a reflector antenna with surface deformation were numerically simulated. The deformation of the reflector antenna under shock wave loading was simulated by LSDYNA software and the far-field patterns of these deformed reflector antennas were calculated by FEKO software. The structuredeformed reflector antennas obtained by LSDYNA software were used as the initial structure of the reflector antennas for calculating the radiation characteristics. The equations were derived to calculate the far field of the reflector antenna according to the physical optics method. As a consequence, according to the encounter modes of the shock wave and the antenna, the far-field patterns were investigated under three conditions of the shock wave frontal action, rear action and oblique action on the antenna.