Fig. 1. Schematic diagram of a multibeam rotatable THz array antenna based on metallic waveguides

Fig. 2. Three-dimensional radiation patterns under the phase difference of two orthogonal polarization components being (a) 0°, (b) 90°, (c) 180°, and (d) 270°, respectively

Fig. 3. The dependence of the interference-enhanced azimuth angle θ_d on the different phase differences Δφ between x- and y-polarized components

Fig. 4. (a) Two-dimensional far-field radiating pattern in the xz plane for Δφ = 0; (b) Dependences of the gain and reflection coefficient S₁₁ frequency