A printed dual polarized array antenna element with a three layer structure

A novel low-cost dual-polarized radiating element is presented for C-band multifunctional dual-polarized radar system: a compact three-layer configuration with reduced cross-polarized isolation enables frequency reuse using polarization diversity. Promising attributes are demonstrated with measured return loss of better than -10 dB from 4.8 to 5.2 GHz. The measured gain is larger than 6 dBi at 5 GHz, along with 29 dB cross-polarization discrimination, scanning capability and regular radiation patterns.