A New Surface-Shaping Technique Based on Parametric Irregular-Point Cluster for Contoured-Beam Reflector Antenna

A new surface shaping method for contoured beam reflector antenna has presented in this paper. The shaping technique has based on tabulated surface of parameterized irregular point cluster. User selectable fifth order polynomial or linear interpolation has used between any two points. Thus, this technique is different from conventional spline and zernike surface shaping method. Any point in tabulated surface has defined by variables. The variables have optimized as per specified radio frequency (RF) goal. Matlab Code has developed to generate parametrized tabulated surface and corresponding variables for optimization using Ticra Tool software. This surface shaping technique afford additional flexibility to achieve stringent RF Goal for contoured beam antenna. Two cases of reflector shaping have presented. In first case, surface shaping using linear interpolation for faceted mesh reflector antenna. In second case, surface shaping using smooth shaping using fifth order polynomial interpolation for solid composite reflector antenna. The results from 3D Periodic method of moments (pMoM) method for 2.5m Ku-Band shaped mesh reflector antenna is agreeing well with results from Physical Optics and Physical Theory of Diffraction (PO and PTD) method.