Analysis and design of circularly polarized waveguide slot array antenna

The polarized characteristic of slot array in the broad wall of a rectangular waveguide was researched based on antenna polarization theory in this paper. The aperture electric field vector distribution was obtained by simulating by Ansoft HFSS, and then based on the vector analysis of different aperture combinations, the horizontal polarization and vertical polarization slot unit have been designed firstly. Then, The aperture parameters of the circularly polarization was analysis theoretically based on the principle of polarization synthesis, A new circularly polarized slot unit in the broad wall of a rectangular waveguide was finally obtained.