Dual-Polarized Wide-Angle Scanning Phased Array Based on Mutimode Patch Elements

In this letter, we report the results of an investigation of multimode microstrip patch resonators and their applications for designing dual-polarized wide-angle scanning phased arrays. The proposed multimode patch element can provide broadside (TM
₀₁
or TM
₁₀
modes) and monopole-like (TM
₂₁
mode) patterns which are combined to obtain a joint wide-beam coverage in both xoz and yoz planes. By interactively selecting these modes, the formed 8 × 8 planar phased array can scan its main beam from -64° to +64° in the two orthogonal planes. Measured results validate some notable features, such as the dual-plane wide-angle scan with the same polarization and high realized gain with low sidelobe levels.