Table 4 Relative permittivity (εr) with moisture (%) change using the FSM and WMM method.
From: SNG and DNG meta-absorber with fractional absorption band for sensing application
Measurement method | Moisture percentage (%) | ε r (real) at resonance f1 (10.62 GHz) | ε r (real) at resonance f2 (11.64 GHz) | ε r (real) at resonance f3 (12.8 GHz) |
|---|---|---|---|---|
FSM | 0 | − 103.3 | 5.05 | 17.99 |
WMM | − 2.4 | 1.94 | 2.12 | |
FSM | 8.5 | − 13.37 | 12.07 | 2.37 |
WMM | 2.82 | 0.95 | 1.17 | |
FSM | 16.1 | 22.78 | 7.56 | 18.83 |
WMM | 2.44 | 1.03 | − 3.81 |
