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Measured resonant frequencies of S21 responses for the four permittivity sensors in GHz.
| Sensor Type | Unloaded (εr = 1) |
TLY-5A (εr = 2.17) |
RF-301 (εr = 2.97) |
TRF-43 (εr = 4.3) |
RF-60A (εr = 6.15) |
RF-10 (εr = 10.2) |
|---|---|---|---|---|---|---|
| DR-CSSR | 1.475 | 1.383 | 1.343 | 1.265 | 1.178 | 1.043 |
| SR-CSSR | 1.510 | 1.400 | 1.348 | 1.265 | 1.153 | 1.018 |
| R-SR-CSSR | 1.508 | 1.353 | 1.300 | 1.218 | 1.083 | 0.965 |
| Proposed IDCS-DGS | 1.518 | 1.333 | 1.278 | 1.190 | 1.050 | 0.903 |
