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Novel Analysis Method of Driving-Point Admittance and Electro-Acoustic Conversion Efficiency of Interdigital Transducers by Six-Port Equivalent Circuit Model

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In this paper, a simple six-port equivalent circuit model for interdigital transducers (IDT) [1] is applied to analyze the performance of IDT for SAW devices. As a result of our study, using the novel electrical equivalent circuit model combining with transmission line theory, we have derived new analysis formulae of input impedance and electro-acoustic conversion to enhance investigating of characteristics of SAW interdigital transducers. The features of the present analysis formulae are: (1) they are close to the actual performance due to including metallization effect, effective enough area ranging from fundamental frequency to harmonic frequency and the various secondary effects, (2) they can be programmed and computed easily. In addition, we also demonstrated the application of this approach by investigating the acoustical excitation of IDT for acousto-optical interaction.
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Document Type: Research Article

Publication date: March 1, 2003

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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