A dual-polarized cross-stacked patch antenna with wide-angle and low cross-polarization for fully digital multifunction phased array radars

In the following contribution, the design of a high performance antenna element with dual-polarization, wide scan angle, and low cross-polarization levels for phased array radars is reported. The antenna was optimized to operate in the federal radio navigation and meteorological band (2.7-2.9 GHz). Cross-polarization levels for E-, D-, and H-plane ≤ -45 dB based on Ludwig's 3rd definition were obtained. Scanning performance of ± 60° for all scanning ranges in the frequency band was achieved. Isolation greater than -40 dB and bandwidths greater than 10 % were reached at the array level.