Plane-wave theory of interdigital transducers comprising multi-strip periodic cells working in Bragg regime

• Autorzy: Danicki E.
• Języki publikacji: EN

Abstrakty

EN

Interdigital transducers of surface acoustic waves are periodic or nearly periodic systems of strips. In several applications they work in the Bragg regime to obtain strong surface wave Bragg reflections. This paper presents generalization of the spectral, full-wave theory to the case of transducers exploiting periodic cells comprising many strips of arbitrary width and positions within the cell. A novel method is applied to solve the dynamic boundary-value problem by means of the generalized electrostatic analysis. The generalization is useful for two purposes: for analysis of transducers having substantially aperiodic strips (by applying large cell periods with respect to the transducer length), and for analysis, in the frame of spectral theory, of unidirectional transducers exploiting cells comprising several different strips and certain interconnections between them within each cell. The theory yields full characterization of such transducers, including the surface wave dispersion characterized by stopband frequencies, and the transducer directionality.

Słowa kluczowe

EN

boundary value problem; interdigital transducers; surface acoustic wave; spectral analysis; surface acoustic wave transducers; surface wave Bragg reflection; surface wave dispersion; interdigital transducers periodic cells

PL

zagadnienie brzegowe; przetwornik grzebieniowy; fala akustyczna powierzchniowa; analiza spektralna

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Journal of Technical Physics
• Rocznik: 2005
• Tom: Vol. 46, no 4
• Strony: 219--234
• Opis fizyczny: Bibliogr. 16 poz., wykr.

Twórcy

autor

Danicki E.

• Institute of Fundamental Technological Research, Polish Academy of Sciences, Świętokrzyska 21, 00-049 Warszawa,

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