Application of genetic algorithm for constrained metal plate lens profile optimization

For specific applications such as Assisted Cruise Control (ACC) systems, the radar operating at 76 GHz requires short and long-range detection. Specifications require high gain, which imposes electrically large focusing elements. In addition, requirement for rather low side-lobe level necessitates some optimization techniques. As the size is several wavelengths, a rapid technique such as Geometrical Optics (GO) should be used for analysis, which allows an efficient design technique when associated with Genetic Algorithm (GA). The design of constrained metal plate lenses is presented and results show that both GA and GO techniques provide an efficient tool for design of electrically large focusing elements.