Figure 5

(a) Measured \(|S_{21}|_{\text {dB}}\) at some discrete frequencies (8.5:0.5:12.0 GHz) for adulteration percentages of \(\delta = 0\), 3, 6, and 9, (b) extracted \(\varepsilon _r^{\prime }\) and \(\varepsilon _r^{\prime \prime }\) of the pure flower honey by using the method discussed in the study27, and (c) measured \(|S_{21}|_{\text {dB}}\) (Meas) of the pure flower and fitted \(|S_{21}|_{\text {dB}}\) using a, b, and c values in Table 1 (Fitted).