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Author: Boris Sveshnikov
Publisher:
ISBN:
Category : Technology
Languages : en
Pages :
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Book Description
On Universal Modeling of the Bulk Acoustic Wave Devices.
Author: Boris Sveshnikov
Publisher:
ISBN:
Category : Technology
Languages : en
Pages :
Get Book Here
Book Description
On Universal Modeling of the Bulk Acoustic Wave Devices.
Author: William D. O'Brien
Publisher:
ISBN:
Category : Acoustic surface wave devices
Languages : en
Pages : 319
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Book Description
Author: Marco G. Beghi
Publisher: BoD – Books on Demand
ISBN: 9535111892
Category : Technology & Engineering
Languages : en
Pages : 616
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Book Description
Acoustics is a mature field which enjoys a never ending youth. New developments are induced by either the search for a better understanding, or by technological innovations. Micro-fabrication techniques introduced a whole new class of microdevices, which exploit acoustic waves for various tasks, and in particular for information processing and for sensing purposes. Performance improvements are achievable by better modelling tools, able to deal with more complex configurations, and by more refined techniques of fabrication and of integration in technological systems, like wireless communications. Several chapters of this book deal with modelling and fabrication techniques for microdevices, including unconventional phenomena and configurations. But this is far from exhausting the research lines in acoustics. Theoretical analyses and modelling techniques are presented, for phenomena ranging from the detection of cracks to the acoustics of the oceans. Measurement methods are also discussed, which probe by acoustic waves the properties of widely different systems.
Author: Tuomas Pensala
Publisher:
ISBN: 9789513877224
Category : Radio filters
Languages : en
Pages :
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Book Description
Thin film bulk acoustic wave (BAW) resonators and filters operating in the GHz range are used in mobile phones for the most demanding filtering applications and complement the surface acoustic wave (SAW) based filters. Their main advantages are small size and high performance at frequencies above 2 GHz. This work concentrates on the characterization, performance optimization, and modelling techniques of thin film BAW devices. Laser interferometric vibration measurements together with plate wave dispersion modeling are used to extract the full set of elastic material parameters for sputter deposited ZnO, demonstrating a method for obtaining material data needed for accurate simulation of the devices. The effectiveness of the acoustic interference reflector used to isolate the vibration from the substrate is studied by 1-D modeling, 2-D finite element method and by electrical and laser interferometric measurements. It is found that the Q-value of reflector-based BAW resonators operating at 2 GHz is limited to approximately 2000 by mechanisms other than leakage through the reflector. Suppression of spurious resonances in ZnO resonators is studied in depth by modeling and measurements. It is verified that the approximate mode orthogonality is behind the suppression in boundary frame type ZnO devices operating in the piston mode, but also another narrow band mode suppression mechanism is found. A plate wave dispersion based 2-D simulation scheme for laterally acoustically coupled BAW resonator filters is developed and employed in designing of experimental devices, which show both good agreement with the model predictions and a remarkable 4.9 % relative bandwidth.
Author: Ken-Ya Hashimoto
Publisher: Springer Science & Business Media
ISBN: 3662042231
Category : Technology & Engineering
Languages : en
Pages : 339
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Book Description
Surface acoustic wave (SAW) devices are widely used in mobile communications, a rapidly evolving market. This book gives an overview on the latest SAW technologies with an emphasis on the design and simulation of devices, such as resonator-based devices employing the SH-type leaky SAW.
Author: Joel Frederick Rosenbaum
Publisher: Artech House Acoustics Library
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 488
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Book Description
This text/reference provides background for those new to the field, gives numerous problems sets and practical examples, and discusses computer aided design and analysis. Annotation copyright Book News, Inc. Portland, Or.
Author: Zaiki Awang
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Peter Alan Wasilousky
Publisher:
ISBN:
Category : Acoustic surface wave devices
Languages : en
Pages : 184
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Book Description
Author: Jeffrey H. Collins
Publisher: Elsevier Science & Technology
ISBN:
Category : Acoustic surface wave devices
Languages : en
Pages : 324
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Book Description
Author: Hugo Chambon
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
This thesis deals with the design and characterization of multilayer acoustic wave micro-devices. The fifth generation of communication (5G) requires more efficient acoustic resonators (frequencies > 3GHz, wider bandwidth). In this context, we have designed and optimized using FEM simulation, the geometry of Lamb wave resonator based on AlScN. The final device, consisting of a layer composed of 30% Sc and deposited on a Bragg W/SiO2 mirror, shows excellent performance (coupling coefficient of 5% and quality factor of 768) as well as a good agreement with the simulation. To characterize the surface of BAW and SAW over the 5G frequency range, we also designed and developed a heterodyne interferometer. The latter has been used successfully to characterize surface vibrations with amplitudes between 1 and 10 pm at 5.95 GHz. Furthermore, thanks to their robustness and ability to be wirelessly interrogated,SAW sensors are used in harsh environments and are of great interest for medical applications and structural health monitoring. Recently, the introduction of multi-material stacks offers new development opportunities. We thus studied a pressure sensor composed of two complementary layers, as well as a so-called package- less sensor using different acoustic impedance layers. To design these new sensors, we have developed a simulation tool based on the extraction of mode coupling parameters and taking into account the effects of temperature, stresses and strains to estimate their sensitivity.
