Figure 3.

Insertion loss (magnitude of S₂₁) profile when a silver-coated 3D-printed SRR is excited using two capacitively coupled coaxial probes. Inset shows the complete assembly considered for this set of simulations. The coupling gap (g) was varied and the corresponding insertion loss values are shown. The curves are not sharp, and minimum IL is 58 dB, which is too lossy to consider for practical scenarios. This necessitates an additional assembly or modification in the design to reduce the losses and to obtain sharp resonances.