A Metasurface Unit Cell for Harmonic Generation and Backscattering

This paper presents a metasurface unit cell featuring harmonic generation and backscattering. The unit cell consists of a circuitry for harmonic generation and a transceiver that receives the fundamental-frequency signal and radiates the second-harmonic energy. While the fundamental-frequency signals impinge on the unit cell, their frequency is converted to the second harmonic, and the energy is radiated out finally. This paper presents the design of the nonlinear circuit, the transceiver, and their simulation results.