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Titolo:
Effects of bulk wave radiation on IDT admittance on 42 degrees YX-LiTaO3
Autore:
Hashimoto, K; Yamaguchi, M; Kovacs, G; Wagner, KC; Ruile, W; Weigel, R;
Indirizzi:
Chiba Univ, Fac Engn, Dept Elect Mech Engn, Chiba 2638522, Japan Chiba Univ Chiba Japan 2638522 ept Elect Mech Engn, Chiba 2638522, Japan EPCOS AG, Surface Acoust Wave Components, D-81617 Munich, Germany EPCOS AG Munich Germany D-81617 Wave Components, D-81617 Munich, Germany Johannes Kepler Univ, Inst Nachrichtentech Informat Tech, A-4040 Linz, Austria Johannes Kepler Univ Linz Austria A-4040 rmat Tech, A-4040 Linz, Austria
Titolo Testata:
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
fascicolo: 5, volume: 48, anno: 2001,
pagine: 1419 - 1425
SICI:
0885-3010(200109)48:5<1419:EOBWRO>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
FINITE-ELEMENT METHOD; SURFACE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
14
Recensione:
Indirizzi per estratti:
Indirizzo: Hashimoto, K Chiba Univ, Fac Engn, Dept Elect Mech Engn, Chiba 2638522, Japan Chiba Univ Chiba Japan 2638522 h Engn, Chiba 2638522, Japan
Citazione:
K. Hashimoto et al., "Effects of bulk wave radiation on IDT admittance on 42 degrees YX-LiTaO3", IEEE ULTRAS, 48(5), 2001, pp. 1419-1425

Abstract

This paper investigates the effects of bulk acoustic wave (BAW) radiation on the admittance of interdigital transducers (IDTs) with significant internal reflections of shear horizontal (SH) type leaky surface acoustic waves (SAWs) on 42 degrees YX-LiTaO3 (42-LT). Theoretical analysis is made by using the discrete Green function theory, and synchronous one-port resonators are analyzed. It is shown that the BAW radiation significantly affects the IDT characteristics even for resonators; under certain circumstances, BAWs launched from an IDT are converted into SH-type SAWs by the strong internalreflections, and they interact with the BAWs radiated by the IDT. Then, the net amount of the radiated BAW power is highly dependent upon the numb erof IDT finger pairs. For the precise simulation of devices based on the SH-type SAWs with strong internal reflections, the BAW radiation should carefully be taken into consideration. If the BAW radiation is ignored, the radiated power of the SH-type SAWs may seem to be negative above the BAW cut-off frequency.

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Documento generato il 02/06/20 alle ore 02:00:12