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Tuneable Film Bulk Acoustic...
To handle many standards and ever increasing bandwidth requirements, large number of filters and switches are used in transceivers of modern wireless communications systems. It makes the cost, performance, form factor, and power consumption of these systems, including cellular phones, critical issues. At present, the fixed frequency filter banks based on Film Bulk Acoustic Resonators (FBAR) are regarded as one of the most promising technologies to address performance -form factor-cost issues. Even though the FBARs improve the overall performances the complexity of these systems remains high. Attempts are being made to exclude some of the filters by bringing the digital signal processing (including channel selection) as close to the antennas as possible. However handling the increased interference levels is unrealistic for low-cost battery operated radios. Replacing fixed frequency filter banks by one tuneable filter is the most desired and widely considered scenario. As an example, development of the software based cognitive radios is largely hindered by the lack of adequate agile components, first of all tuneable filters. In this sense the electrically switchable and tuneable FBARs are the most promising components to address the complex cost-performance issues in agile microwave transceivers, smart wireless sensor networks etc.Tuneable Film Bulk Acoustic Wave Resonators discusses FBAR need, physics, designs, modelling, fabrication and applications. Tuning of the resonant frequency of the FBARs is considered. Switchable and tuneable FBARs based on electric field induced piezoelectric effect in paraelectric phase ferroelectrics are covered. The resonance of these resonators may be electrically switched on and off and tuned without hysteresis.The book is aimed at microwave and sensor specialists in the industry and graduate students. Readers will learn about principles of operation and possibilities of the switchable and tuneable FBARs, and will be given general guidelines for designing, fabrication and applications of these devices
Monografía
monografia Rebiun03933161 https://catalogo.rebiun.org/rebiun/record/Rebiun03933161 |acr nuu---uuuuu 130217s2013 xxk| s |||| 0|eng d 9781447149446 10.1007/978-1-4471-4944-6 doi UPVA 996874659603706 UAM 991007838641804211 UCAR 991007919399304213 UPCT u459075 UMO 143553 621.3815 23 Gevorgian, Spartak Sh Tuneable Film Bulk Acoustic Wave Resonators Recurso electrónico] by Spartak Sh Gevorgian, Alexander K Tagantsev, Andrei K Vorobiev Servicio en línea London Springer London Imprint: Springer 2013 London London Springer London Imprint: Springer XVIII, 243 p. 107 illus., 38 illus. in color. digital XVIII, 243 p. 107 illus., 38 illus. in color. Engineering Materials and Processes 1619-0181 Libros electrónicos descargables Dielectric and Acoustic Properties of Ferroelectrics and Piezoelectrics -- Models of FBARs -- Making Non-tuneable FBARs Tuneable -- FBARs Utilising Induced Piezoelectric Effect -- Designs of Tuneable FBARs -- Fabrication Processes and Measurements of FBARs -- Circuit Applications -- Conclusion and Challenges To handle many standards and ever increasing bandwidth requirements, large number of filters and switches are used in transceivers of modern wireless communications systems. It makes the cost, performance, form factor, and power consumption of these systems, including cellular phones, critical issues. At present, the fixed frequency filter banks based on Film Bulk Acoustic Resonators (FBAR) are regarded as one of the most promising technologies to address performance -form factor-cost issues. Even though the FBARs improve the overall performances the complexity of these systems remains high. Attempts are being made to exclude some of the filters by bringing the digital signal processing (including channel selection) as close to the antennas as possible. However handling the increased interference levels is unrealistic for low-cost battery operated radios. Replacing fixed frequency filter banks by one tuneable filter is the most desired and widely considered scenario. As an example, development of the software based cognitive radios is largely hindered by the lack of adequate agile components, first of all tuneable filters. In this sense the electrically switchable and tuneable FBARs are the most promising components to address the complex cost-performance issues in agile microwave transceivers, smart wireless sensor networks etc.Tuneable Film Bulk Acoustic Wave Resonators discusses FBAR need, physics, designs, modelling, fabrication and applications. Tuning of the resonant frequency of the FBARs is considered. Switchable and tuneable FBARs based on electric field induced piezoelectric effect in paraelectric phase ferroelectrics are covered. The resonance of these resonators may be electrically switched on and off and tuned without hysteresis.The book is aimed at microwave and sensor specialists in the industry and graduate students. Readers will learn about principles of operation and possibilities of the switchable and tuneable FBARs, and will be given general guidelines for designing, fabrication and applications of these devices Tagantsev, Alexander K Vorobiev, Andrei K SpringerLink eBooks (Servicio en línea) Engineering Materials and Processes 1619-0181