A 45deg oblique polarized printed dipole antenna array

A printed dipole antenna is designed for a 45deg oblique polarized wideband wide-angle scan antenna array, whose work frequency is whole X band, and the scan angle is positive negative 45deg at horizontal direction. Its bandwidth is extended to 50 percent by using a short-circuited probe balun to compensated the feed distribution capacitor and adding a parasitic patch. Because of the parasitic radiation of the balun, the difference between the horizontal polarization patterns and the vertical polarization patterns when wide-angle scan work is too large, which is a important performance of a 45deg oblique polarized array. The antenna is improved to be double plates with two face radiation dipoles and a lot of metallization holes to close the balun radiation. The measured results of the improved antenna show it can achieve X band 45deg scan 45deg oblique polarized work.