An ultralow cross-polarization slotted waveguide chebyshev array antenna

An ultralow cross-polarization slot chebyshev array antenna in the narrow wall of ridge waveguide is presented. The normalized conductance obtained for untilted slot waveguide by concave and convex ridges. A slot array waveguide antenna was designed using ridges on its narrow wall and nine radiation elements having a frequency of 5 GHz by applied the normalized conductance of each radiating slot. It is shown that good performance can be achieved even for concave and convex ridges in waveguide. The antenna has the characteristics SLL= -20 dB and cross-polarization equivalent to -60 dB.