Fast Reconfigurable Phase Shifter Based on a Chiral Liquid Crystal Configuration

Liquid crystals (LCs) offer a promising playground for developing reconfigurable radio frequency devices due to their unique dielectric properties, including large birefringence and tunability. Previous research on phase shifters has primarily focused studying loss, response, However, the influence of surface-enforced alignment LC remains an area that requires further exploration. Here, we designed shifter using twisted nematic aligned cells. To characterize phase-shifting behavior LC, employed transmission line method within range 5 8 GHz extracted dynamic electrical parameters. Numerical simulations based finite element methods were conducted predict molecules propagation waves test cell. The achieved difference $\sim $ 220° by applying bias voltage LC. In particular, compare response configuration having chiral dopant responds 10 times faster than homogeneous mode.