Piezoelectric bulk and surface acoustic devices
MICRO-712 / 2 credits
Teacher(s): Villanueva Torrijo Luis Guillermo, Invited lecturers (see below)
Language: English
Remark: November 15 to 30, 2021 (online / Self-Paced / Q&A Zoom sessions 9h to 11h on 2 dates TBC)
Frequency
Only this year
Summary
Course dealing with the design and fabrication of fundamental components of smart phones front-end communication (filters, duplexers, quadplexers).
Content
Basic Physics: waves and vibrations (10h)
1. Fundamentals of theory of elasticity
2. Acoustic waves in isotropic solids
3. Reflections and refractions of elastic waves
4. Rayleigh Surface Acoustic Waves (SAW) in isotropic media
Acoustics of crystals (10h)
5. Piezoelectricity and Electro-mechanical coupling
6. Acoustic waves in piezoelectric materials and Anisotropy
7. Energy flow, phase and group velocities
8. How do crystal (quartz) resonators operate?
9. Thin Film Bulk Acoustic wave Resonators (FBARs)
10. Generation of bulk acoustic waves by piezoelectric transducers
11. Different types of SAW in piezoelectric crystals: Rayleigh type SAW, Bleustein-Gulyaev waves, "leaky" SAW, STW, etc
SAW and FBAR Devices (5h)
12. Interdigital transducer (IDT) – elementary theory and properties
13. SAW reflectors, unidirectional transducers, multistrip couplers, waveguides
14. Ladder filters & duplexers
Note
Invited Speaker: Victor Plessky
Keywords
SAW, FBAR, Electromechanics, Electroacoustics, Filters, RF
Learning Prerequisites
Required courses
Knowledge of basic physics (oscillations, waves, diffraction, alternative currents, impedance) and math (matrixes, linear diff. equations, complex variables) is required. Knowledge of Scaling laws and Microfabrication is recommended.
Resources
Bibliography
[1] D. Royer, E. Dieulesaint, Elastic waves in solids, Springer, 2000
[2] Ken-Ya Hashimoto, SAW Devices in Telecommunications: Modelling and Simulation, Springer, Apr 2013.
Ressources en bibliothèque
In the programs
- Number of places: 30
- Exam form: Term paper (session free)
- Subject examined: Piezoelectric bulk and surface acoustic devices
- Lecture: 25 Hour(s)