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Ferroelectric thin film acoustic devices with electrical multiband switching ability
Sergey V Ptashnik1,2, Anatoliy K Mikhailov1,2, Alexander V Yastrebov1,2
1Microwave laboratory "Pulse", Saint-Petersburg state electrotechnical university, Saint-, Petersburg, Russia.
Scientific Reports
|November 12, 2017
Summary
This study introduces novel microwave resonators capable of switching between multiple frequency bands. These thin film bulk acoustic resonators offer potential for miniaturizing microwave antenna circuits.
Area of Science:
- Electrical Engineering
- Materials Science
- Acoustics
Background:
- Microwave devices require efficient resonators for frequency control.
- Existing resonators often lack multiband capabilities or miniaturization potential.
Purpose of the Study:
- To present design principles for new microwave thin film bulk acoustic resonators.
- To enable multiband resonance frequency switching ability.
Main Methods:
- Theoretical analysis of acoustic eigenmode excitation in multilayer ferroelectric structures.
- Formulation of a selectivity principle for resonators.
- Introduction of a "criterion function" for mode selection.
Main Results:
- A theoretical framework for designing switchable multiband resonators.
- Verification of the theoretical approach with existing experimental data.
- Demonstration of a criterion function for selective mode excitation.
Conclusions:
- The proposed design principles enable multiband resonance frequency switching.
- Applications include switchable microwave overtone resonators and phase-shift keying modulators.
- These devices can significantly contribute to the miniaturization of microwave front-end antenna circuits.
