Design of a 3D Metal Printed Axial Corrugated Horn Antenna Covering Full Ka-Band

This letter presents design and development of an axial corrugated horn covering the full Ka-band (26.5-40 GHz) based on modal analysis. Physical parameters of corrugation steps are studied in terms of modal power coupled into the dominant and higher order modes. This gives physical insight into the influence of design parameters on the radiation pattern. Design steps based on the modal power coupling are discussed. The designed horn is fabricated using three-dimensional metal printing. Measured radiation pattern show good beam symmetry and cross-polarization level better than 29 dB is achieved in the principal planes over the frequency band.