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Titolo: PROPERTIES OF INTERDIGITAL TRANSDUCERS IN RELATION TO THE SUBSTRATE CRYSTAL SYMMETRY
Autore: MARTIN G; WEIHNACHT M; FRANKE K;
 Indirizzi:
 INST FESTKORPER & WERKSTOFF FORSCH DRESDEN D01171 DRESDEN GERMANY
 Titolo Testata:
 IEEE transactions on ultrasonics, ferroelectrics, and frequency control
fascicolo: 4,
volume: 43,
anno: 1996,
pagine: 646  653
 SICI:
 08853010(1996)43:4<646:POITIR>2.0.ZU;2E
 Fonte:
 ISI
 Lingua:
 ENG
 Tipo documento:
 Article
 Natura:
 Periodico
 Settore Disciplinare:
 Science Citation Index Expanded
 Science Citation Index Expanded
 Citazioni:
 12
 Recensione:
 Indirizzi per estratti:



 Citazione:
 G. Martin et al., "PROPERTIES OF INTERDIGITAL TRANSDUCERS IN RELATION TO THE SUBSTRATE CRYSTAL SYMMETRY", IEEE transactions on ultrasonics, ferroelectrics, and frequency control, 43(4), 1996, pp. 646653
Abstract
Exclusively from the crystal symmetry, we obtain results concerning properties of interdigital transducers radiating Rayleigh waves along highsymmetrical crystal directions. Three cases of highsymmetrical directions are considered: the propagation direction is parallel to a rotation axis, perpendicular to a mirror plane, or parallel to a rotoinversion axis of the substrate crystal. In respect to the symmetry properties of the piezoelectric tensor related to a mirror operation on a plane perpendicular to the propagation direction, the three original cases can be concentrated in three symmetry cases. The crystal symmetry determines the properties of the piezoelectric tensor, and consequently the wave excitation by transducers. These considerations enable one to ascertain the positions of the transduction centers and the influence of internal reflections to the amplitude characteristics. Furthermore, we are able to discuss natural singlephase unidirectional transducer (NSPUDT) effects in layer structures, the old question ''crossedfield or inline model,'' and the existence of crosscoupling of waves,similar to multistrip couplers, in interdigital transducers (IDT's). The theoretical predictions are compared with our own and other authors' experimental results.
ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 09:56:58