Fig. 2: Various differential processing kernels based on inverse design.
From: Reconfigurable metamaterial processing units that solve arbitrary linear calculus equations
a Pixel metamaterial construction. The function of metamaterial is adjusted by controlling the ON/OFF state between patches. By using the moment method with equivalent ports, the time of the inverse design process can be significantly reduced. b Simulated results of the first-order differential kernel by inverse design. The blue line represents the amplitude of the transmission coefficient, and the orange line represents the phase of the transmission coefficient. The results accord well with the theoretical requirements of first-order differential kernel. c Surface electric field distribution of first-order differential kernel at different frequencies from full-wave simulation. The distribution at the output port aligns with the predicted behavior. d Simulated results of second-order differential kernel. e Surface electric field distribution of second-order differential kernel. f Simulated results of third-order differential kernel. g Surface electric field distribution of third-order differential kernel.
