Fig. 3: Design of Huygens’ metasurface processor.
From: Single-layer spatial analog meta-processor for imaging processing

a Geometric structure of the proposed elementary Huygens’ meta-atom patterned on both sides of the dielectric substrate (\({\varepsilon }_{r}=3,\,\tan \delta =0.002\)). b Surface currents and equivalent electric circuits of the proposed meta-atom. The green line with arrows and orange arrows indicate the surface electric and magnetic current respectively. c Simulated transmission amplitude and phase of 25 extracted meta-atoms by modulating the geometrical parameters le, he and lm, hm at 10 GHz.