Table 2 Characteristics of the suggested MM structure's effective parameters.
From: Polarization insensitive dual band metamaterial with absorptance for 5G sub-6 GHz applications
Parameters | Frequency range (GHz) | Near-zero/negative region | Bandwidth threshold |
|---|---|---|---|
S21 | 3.1–3.6 and 5.76–5.8 | \(S_{21} < - 10\,{\text{dB}}\) | |
\(\varepsilon_{r}\) | 3.37–4.5 and 5.8–5.95 | \(\varepsilon_{r} < 0\) | |
\(\mu_{r}\) | 3.37 and 5.8 | 0.02 and 0.13 (real) | \(\mu_{r} < 0\) |
n | 3.39 and 5.81 | − 2.88 and − 2.06 (real) | \(n < - 1.5\) |
