Table 3 Curve fitting values \(a_{\text {all}}\), \(b_{\text {all}}\), \(c_{\text {all}}\), and k using the measured \(|S_{21}|\) for different \(\delta\) values.
Cases | Parameter | \(R^2\) | |||
|---|---|---|---|---|---|
\(a_{\text {all}}\) | \(b_{\text {all}}\) | \(c_{\text {all}}\) | k | ||
Case-I | 667.5 | 0.7719 | − 9.102 | 0.2234 | 0.926 |
Case-II | 686.8 | 0.7763 | − 9.099 | 0.2242 | 0.938 |