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17 results on '"Fattinger, Gernot"'

2. 5G C-V2X Filter Using BAW Technology

Author

Karnati, Kalyan, primary, Schaefer, Michael, additional, Yusuf, Waleed, additional, Rothemund, Ralph, additional, Al-Joumayly, Mudar, additional, and Fattinger, Gernot, additional

Published
2021
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17. Acoustic reflector for a BAW resonator providing specified reflection of both shear waves and longitudinal waves

Author

Marksteiner Stephan, Jyrki Kaitila, Fattinger Gernot, and Aigner Robert

Subjects
Shear waves, Materials science, Acoustics and Ultrasonics, Acoustics, Physics::Optics, Reflector (antenna), Distributed Bragg reflector, Piezoelectricity, Physics::Geophysics, Shear (sheet metal), Resonator, Arts and Humanities (miscellaneous), Computer Science::Sound, Reflection (physics), Longitudinal wave
Abstract

A BAW resonator includes a piezoelectric layer, a first electrode, a second electrode, a substrate, and an acoustic reflector disposed between the substrate and the second electrode. The acoustic reflector has a plurality of layers. A performance of the acoustic reflector is determined by its reflectivity for a longitudinal wave existing in the BAW resonator at the resonance frequency of the BAW resonator and by its reflectivity for a shear wave existing in the BAW resonator at the resonance frequency of the BAW resonator. The layers of the acoustic reflector and layers disposed between the acoustic reflector and the piezoelectric layer are selected, with reference to their number, material, and thickness, such that the transmissivity for the longitudinal wave and the transmissivity for the shear wave in the area of the resonance frequency is smaller than −10 dB.

Published
2006

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