Low-Profile Dual-Polarization Folded Crossed Dipole Antenna

In this letter, a low-profile dual-polarization folded crossed dipole antenna based on multiplayer plate technology is proposed to realize the miniaturization of the antenna. The $\mathbf{2}\times \mathbf{2}$ phased array antenna has been improved based on this unit using the method of phase extinction of induced currents. The results show that the overall height of the antenna is only $\mathbf{0.005}\boldsymbol{\lambda}$, and the 3dB bandwidth of the cell is 118°. The sub-array designed on this basis can achieve a scan angle of $\pm \mathbf{50}^{\circ}$ in both y-polarization and x-polarization.