An Ultra-Wideband 45° Oblique Polarized Antenna Array

A 45 degrees oblique polarized ultra-wideband wide-angle scan antenna array is designed and made. The work frequency bandwidth of it is 3: 1, the scan angle is +/- 30 degrees scan at horizontal direction, and the array size is 16x4. The antenna is the printed log-periodic antenna made by dielectric substrate, and it's feed by a semirigid coaxial line. It has some advantages such as little weight, easy manufacture, high accuracy and consistency. The structure of the antenna and simulation method is introduced. After be measured, the VSWRs of the antenna at 3: 1 bandwidth with +/- 30 degrees scan angle are blew 2.5. The lobe diagrams of the antenna shows the antenna array can achieve +/- 30 degrees scan at horizontal direction..