*Multifunctional Ferroelectric Materials*


The temperature dependence of *ε<sup>r</sup>* and *tan δ* for single-crystal SrTiO3 ferroelectric material has been reported by Krupka et al. [36] and is summarized in

which is very attractive at very low temperatures.

*DOI: http://dx.doi.org/10.5772/intechopen.98475*

*Tunable Zeroth-Order Resonator Based on Ferroelectric Materials*

**Figure 11** shows the variation of resonance frequency with the temperature

The data were conducted at 77 K in the 2.5 to 4.5 GHz frequency range. It is worth to observe that, at no bias and at 3 GHz, the insertion loss IL = 0.2 dB. These simulated data are not de-embedded, meaning that any contribution from the SMA launchers used for the measurement to the overall insertion loss has not been

**Figure 12** and **Table 4** indicates the effect of E-field on the response of ZOR, the E-fields is varying from 0 to 30 Kv/cm. If the sample kept at a constant temperature

*Variation of the magnitude of the transmission coefficient with the frequency at different electric field E. (a) S21*

**Tables 2** and **3**.

**Figure 12.**

*(b) S11.*

**119**

compensated from the data.
