Figure 9
Simulated S-parameters (‘Sim.’ with solid lines), extracted S-parameters by the proposed method (‘Ext. (PM)’ with dashed lines), measured S-Parameters by the TRL calibration procedure22 (‘Meas. (TRL)’ with dotted green lines), and extracted S-parameters by the de-embedding method47 (‘Ext. (Ref. 47)’ with dashdot black lines) of the sensing area (double resonators next to the microstrip line). (a) Real and (b) imaginary parts of \(S_{11}^D\), (c) real and (d) imaginary parts of \(S_{21}^D\) (\(\cong S_{12}^D\)), and (e) real and (f) imaginary parts of \(S_{22}^D\).
