Abstract
Multiphase microwave dielectrics with a high electric Q-factor and controlled thermal stability of electric properties on the base of barium polytitanates were developed. A nature of a Q-factor increase in multiphase systems is determined. Composite resonant elements on a basis of multiphase materials with a high Q-factor and a ferrimagnetic film were developed. It was shown that composite resonators are characterized by high Q-factor and an opportunity to tune the resonance frequency with the magnetic field, which allows their use in various tunable microwave devices.
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