Effect of design parameters on sidelobe level of short-focus parabolic reflector antenna

In this paper, a low sidelobe short-focus parabolic reflector antenna fed by a half-wave dipole with a disk secondary reflector is presented. Effect of focal length to diameter ratio and secondary reflector parameters on sidelobe level has been explored. Electromagnetic simulations and theoretical analysis of parameters variation were performed. The tendency and degree of the effect of each parameter on sidelobe level have been given. This low sidelobe short-focus parabolic reflector antenna has the advantages of low cost, small size, simple structure and perfect electrical properties. It can be applied to special occasions as life detection radar systems which in need of low cost and small-size.