A circularly polarized waveguide slot array antenna based on genetic algorithm

Millimeter wave of microwave is the important wave band for the modern communication system. Waveguide slot array antenna which has used for both wired and wireless communication is the hot and difficult point of current research in the millimeter wave band. This paper takes slot array in broad wall of rectangular waveguide as the research object to improve the formulas designing for the circularly polarized waveguide slot unit, and then genetic algorithm is used to optimize parameters of slots. The simulation results show that 3dB axis ratio bandwidth is broadened and polarization performance of circularly polarized waveguide slot unit is effectively improved. It provides a certain reference value theory and implementation technology for designing circularly polarized antenna in the millimeter wave band or the microwave band.