Acoustic Field Analysis of Surface Acoustic Wave Dispersive Delay Lines Using Inclined Chirp IDT

Koichiro MISU; Koji IBATA; Shusou WADAKA; Takao CHIBA; Minoru K. KUROSAWA

doi:10.1093/ietfec/e90-a.5.1014

Acoustic Field Analysis of Surface Acoustic Wave Dispersive Delay Lines Using Inclined Chirp IDT

Koichiro MISU, Koji IBATA, Shusou WADAKA, Takao CHIBA, Minoru K. KUROSAWA

Full Text Views

0

Cite this

Summary :

Acoustic field analysis results of surface acoustic wave dispersive delay lines using inclined chirp IDTs on a Y-Z LiNbO₃ substrate are described. The calculated results are compared with optical measurements. The angular spectrum of the plane wave method is applied to calculation of the acoustic fields considering the anisotropy of the SAW velocity by using the polynomial approximation. Acoustic field propagating along the Z-axis of the substrate, which is the main beam excited by the inclined chirp IDT, shows asymmetric distribution between the +Z and -Z directions. Furthermore the SAW beam propagating in a slanted direction with an angle of +18 from the Z axis to the X-axis is observed. It is described that the SAW beam propagating in a slanted direction is the first side lobe excited by the inclined chirp IDT. The acoustic field shows asymmetric distribution along the X-axis because of the asymmetric structure of the inclined chirp IDT. Finally, acoustic field of a two-IDT connected structure which consists of the same IDTs electrically connected in series is presented. The acoustic field of the two-IDT connected structure is calculated to be superposed onto the calculated result of the acoustic field exited by one IDT on the calculated result shifted along the X-axis. Two SAW beams excited by IDTs are observed. The distributions of the SAW beams are not in parallel. The calculated results show good agreement with the optical measurement results.

Publication: IEICE TRANSACTIONS on Fundamentals Vol.E90-A No.5 pp.1014-1020

Publication Date: 2007/05/01

Publicized

Online ISSN: 1745-1337

DOI: 10.1093/ietfec/e90-a.5.1014

Type of Manuscript: PAPER

Category: Ultrasonics

Cite this

Copy

Koichiro MISU, Koji IBATA, Shusou WADAKA, Takao CHIBA, Minoru K. KUROSAWA, "Acoustic Field Analysis of Surface Acoustic Wave Dispersive Delay Lines Using Inclined Chirp IDT" in IEICE TRANSACTIONS on Fundamentals, vol. E90-A, no. 5, pp. 1014-1020, May 2007, doi: 10.1093/ietfec/e90-a.5.1014.
Abstract: Acoustic field analysis results of surface acoustic wave dispersive delay lines using inclined chirp IDTs on a Y-Z LiNbO₃ substrate are described. The calculated results are compared with optical measurements. The angular spectrum of the plane wave method is applied to calculation of the acoustic fields considering the anisotropy of the SAW velocity by using the polynomial approximation. Acoustic field propagating along the Z-axis of the substrate, which is the main beam excited by the inclined chirp IDT, shows asymmetric distribution between the +Z and -Z directions. Furthermore the SAW beam propagating in a slanted direction with an angle of +18 from the Z axis to the X-axis is observed. It is described that the SAW beam propagating in a slanted direction is the first side lobe excited by the inclined chirp IDT. The acoustic field shows asymmetric distribution along the X-axis because of the asymmetric structure of the inclined chirp IDT. Finally, acoustic field of a two-IDT connected structure which consists of the same IDTs electrically connected in series is presented. The acoustic field of the two-IDT connected structure is calculated to be superposed onto the calculated result of the acoustic field exited by one IDT on the calculated result shifted along the X-axis. Two SAW beams excited by IDTs are observed. The distributions of the SAW beams are not in parallel. The calculated results show good agreement with the optical measurement results.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1093/ietfec/e90-a.5.1014/_p

Copy

@ARTICLE{e90-a_5_1014,
author={Koichiro MISU, Koji IBATA, Shusou WADAKA, Takao CHIBA, Minoru K. KUROSAWA, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Acoustic Field Analysis of Surface Acoustic Wave Dispersive Delay Lines Using Inclined Chirp IDT},
year={2007},
volume={E90-A},
number={5},
pages={1014-1020},
abstract={Acoustic field analysis results of surface acoustic wave dispersive delay lines using inclined chirp IDTs on a Y-Z LiNbO₃ substrate are described. The calculated results are compared with optical measurements. The angular spectrum of the plane wave method is applied to calculation of the acoustic fields considering the anisotropy of the SAW velocity by using the polynomial approximation. Acoustic field propagating along the Z-axis of the substrate, which is the main beam excited by the inclined chirp IDT, shows asymmetric distribution between the +Z and -Z directions. Furthermore the SAW beam propagating in a slanted direction with an angle of +18 from the Z axis to the X-axis is observed. It is described that the SAW beam propagating in a slanted direction is the first side lobe excited by the inclined chirp IDT. The acoustic field shows asymmetric distribution along the X-axis because of the asymmetric structure of the inclined chirp IDT. Finally, acoustic field of a two-IDT connected structure which consists of the same IDTs electrically connected in series is presented. The acoustic field of the two-IDT connected structure is calculated to be superposed onto the calculated result of the acoustic field exited by one IDT on the calculated result shifted along the X-axis. Two SAW beams excited by IDTs are observed. The distributions of the SAW beams are not in parallel. The calculated results show good agreement with the optical measurement results.},
keywords={},
doi={10.1093/ietfec/e90-a.5.1014},
ISSN={1745-1337},
month={May},}

Copy

TY - JOUR
TI - Acoustic Field Analysis of Surface Acoustic Wave Dispersive Delay Lines Using Inclined Chirp IDT
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 1014
EP - 1020
AU - Koichiro MISU
AU - Koji IBATA
AU - Shusou WADAKA
AU - Takao CHIBA
AU - Minoru K. KUROSAWA
PY - 2007
DO - 10.1093/ietfec/e90-a.5.1014
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E90-A
IS - 5
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - May 2007
AB - Acoustic field analysis results of surface acoustic wave dispersive delay lines using inclined chirp IDTs on a Y-Z LiNbO₃ substrate are described. The calculated results are compared with optical measurements. The angular spectrum of the plane wave method is applied to calculation of the acoustic fields considering the anisotropy of the SAW velocity by using the polynomial approximation. Acoustic field propagating along the Z-axis of the substrate, which is the main beam excited by the inclined chirp IDT, shows asymmetric distribution between the +Z and -Z directions. Furthermore the SAW beam propagating in a slanted direction with an angle of +18 from the Z axis to the X-axis is observed. It is described that the SAW beam propagating in a slanted direction is the first side lobe excited by the inclined chirp IDT. The acoustic field shows asymmetric distribution along the X-axis because of the asymmetric structure of the inclined chirp IDT. Finally, acoustic field of a two-IDT connected structure which consists of the same IDTs electrically connected in series is presented. The acoustic field of the two-IDT connected structure is calculated to be superposed onto the calculated result of the acoustic field exited by one IDT on the calculated result shifted along the X-axis. Two SAW beams excited by IDTs are observed. The distributions of the SAW beams are not in parallel. The calculated results show good agreement with the optical measurement results.
ER -