Low Complexity Design Methods of the Space-time Modulated Metasurface: Theory and Experiments

In order to manipulate electromagnetic wave in both space and frequency domain with metasurface, low complexity methods of space-time modulated metasurface design is proposed in this paper. Firstly, ideal time-varying scattering coefficient is introduced and discretized. Then, Fourier Series is applied to analyze time series so as to realize manipulation in both space and frequency domain analytically with low complexity. In the end, the proposed method is applied to achieve I/Q two paths modulation and DoA estimation, which paves a new way for the applications in radar, communication and other fields.