A Novel Wideband Reflectarray Design Using an Equivalent Magnetic Dipole Element

A novel wideband reflectarray antenna consisting of an H-shaped patch and two T-shaped patches is proposed. The slot formed by the T-shaped patch and H-shaped patch cuts off the surface current and introduces a magnetic source. The phase response is achieved by changing the length of equivalent magnetic dipole. The wider bandwidth is obtained by introduced more magnetic dipoles. A reflectarray antenna is designed to verify the broadband characteristics of the cell. The simulated result show that the 1.5-dB gain bandwidth is 31.3% and the peak gain is 27.5 dBi with the aperture efficiency of 53.5% is achieved at 11.5 GHz.