Fig. 1. Unit cell of polarization converter based on metamaterial. (a) Side view; (b) front view

Fig. 2. (a) Co-polarization reflection coefficient rxx, cross-polarization reflection coefficient ryx, and (b) PCR of polarization converter

Fig. 3. PCR of polarization converters with different numbers of L-shaped patches

Fig. 4. ryx, rxx, and their corresponding relative phase Δφyx versus frequency. (a) Full figure; (b) partial figure

Fig. 5. Simulated results of (a) ryx and (b) rxx under different incident angles

Fig. 6. Current distributions at front metal and bottom metal plate. (a) 0.689 THz; (b) 0.924 THz