3. Selection of dielectric materials
3.1 Frequency thermal stability coefficient
This coefficient , known as TCF (Temperature Coefficient of Frequency), is critical for these devices. Natural materials such as alumina, silicates, and titanium oxide have temperature coefficients in the tens of ppm/K; therefore, the user must select the material with the allows it to create a device whose frequency varies as little as possible across its temperature range. The resonator alone does not determine this stability,...
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Selection of dielectric materials
Dielectric constant of materials and dielectric losses
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