Figure 8.

Measurements of S-parameters of the fabricated TPoS resonators in differential configurations. (a) The measured response of the single terminal in single terminal out setup (SISO) is shown as the red trace, and the blue trace is the transmission plot for the DIDO setup. A resonant peak with high signal to background ratio (SBR) is achieved by the DIDO setup. The SBR of SISO is much lower than DIDO because of no cancellation of the common-mode feedthrough signal. The insert loss of the DIDO setup is much better than the SISO setup because this setup of DIDO can enhance the differential-mode signal. (b) Measurement configurations of resonator operating in SISO and DIDO.