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. 2019 Jul 12;19(14):3077. doi: 10.3390/s19143077

Figure 3.

Figure 3

Measured S-parameters of four individual sensors: (a) left: time domain, the different sensor responses are shown in different colors; (b) right: frequency domain, all sensors show the same transfer function—a wideband plateau so that the interrogation in the ISM band can happen successfully no matter of the temperature shift.