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. 2019 Jan 25;19(3):498. doi: 10.3390/s19030498

Table 1.

Resonant frequencies of S21 responses for the four permittivity sensors in GHz.

Sensor Type εr = 1 εr = 2 εr = 3 εr = 4 εr = 5 εr = 6 εr = 7 εr = 8 εr = 9 εr = 10
DR-CSSR 1.5 1.412 1.340 1.280 1.228 1.182 1.142 1.105 1.071 1.041
SR-CSSR 1.5 1.398 1.318 1.251 1.194 1.145 1.103 1.064 1.028 0.997
R-SR-CSSR 1.5 1.367 1.270 1.190 1.124 1.067 1.019 0.977 0.941 0.908
Proposed IDCS-DGS 1.5 1.339 1.222 1.130 1.056 0.996 0.945 0.901 0.863 0.829