▎ 摘　　要

This paper presents an electronic reconfigurable pattern control using artificial magnetic conductor (AMC) graphene surfaces for terahertz (THz) applications. The proposed graphene AMC surface consists of modified star-shaped slotted graphene sheets printed on the top and bottom sides of dielectric substrate. Square graphene ring with 1 mu m width is used to control the ground plane size of the AMC-surface. The AMC-cell operates at 1.4 THz with wide frequency varying range from 1.05 to 2.2 THz for mu(c)changed from 0.1 to 2 eV. The radiated waves from a rectangular dipole antenna backed by graphene AMC surface is deflected from the broadside direction to the end-fire direction. According to the number of unbiased graphene ring rowsN(un)the beam direction is controlled. The effective area of the proposed graphene-based AMC reflector is increased or decreased through operating these rings, respectively. Biasing graphene means applying a DC voltage value across it corresponding to mu(c) = 2 eV, while corresponding to mu(c) = 0 eV. Different AMC surfaces arrangements are investigated. For 17 x 17 AMC unit-cell, the peak gain direction in the y-z plane is theta = 0 degrees forN(un)= 0, theta = +/- 16 degrees forN(un)= 4 rows, theta = +/- 65 degrees forN(un)= 6 rows, and theta = +/- 90 degrees forN(un)= 8 rows. The HPBW is 232 degrees, 236 degrees, and 239 degrees forN(un)= 4, 6, and 8 unbiased rows, respectively.