Wide-band planar arrays for radar applications

This article presents the development of printed antennas arrays with formed patterns, operating in a 15% over 20% bandwidth (in C and X bands), with mono or dual linear polarization and intended for radar applications. These arrays are created by multilayer radiators fed across the slots, by a corporate feed distribution of microstrips lines and power dividers like Wilkinson and (or) hybrids rings. They are optimized in order to observe a good polarization purety (similar to -25 dB), a weak sidelobe (similar to -25 dB) and cross - polarization level (similar to -25 dB).