Surface acoustic wave device using a leaky surface acoustic wave

Wave transmission lines and networks – Coupling networks – Electromechanical filter

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310313A, 310313B, 310360, 333194, H03H 925, H03H 964, H03H 9145

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active

060378476

ABSTRACT:
A surface acoustic wave device includes a piezoelectric substrate of a single crystal LiTaO.sub.3 and an electrode pattern provided on the piezoelectric substrate. The electrode pattern contains Al as a primary component and has a thickness in a range of 0.03-0.15 times a wavelength of a surface acoustic wave excited on the piezoelectric substrate. The piezoelectric substrate has an orientation rotated about an X-axis thereof from a Y-axis thereof toward a Z-axis thereof, with a rotational angle of 39-46.degree..

REFERENCES:
patent: Re35204 (1996-04-01), Lewis
patent: 4159435 (1979-06-01), Lewis
patent: 5485051 (1996-01-01), Tera et al.
patent: 5506552 (1996-04-01), Seki et al.
patent: 5559481 (1996-09-01), Satoh et al.
patent: 5592135 (1997-01-01), Taguchi et al.
patent: 5654680 (1997-08-01), Kwan et al.
patent: 5729186 (1998-03-01), Seki et al.
patent: 5874869 (1999-02-01), Ueda et al.
"Propagation and Amplification of Rayleigh Waves and Piezoelectric Leaky Surface Waves in LiNbO.sub.3 ", Yamanouchi et al, J. Appl. Phys., vol. 43, No. 3, Mar. 1972, pp. 856-862.
"Development of Low-Loss Band-Pass Filters Using Saw Resonators for Portable Telephones", Ikata et al, 1992 Ultrasonics Symposium, pp. 111-115.
"SH-Type and Rayleigh-type Surface Waves in Rotated Y-Cut LiTaO.sub.3 ", Nakamura et al, US77-42, 1997, pp. 31-36.
"Low Loss Ladder Type SAW Filter in the Range of 300 to 400 MHz", Ueda et al, 1994 IEEE International Ultrasonics Symposium, Nov. 1-4, 1994.
"Improved Material Constants for LiNbO.sub.3 and LiTaO.sub.3 ", Kovacs et al, 1990 Ultrasonics Symposium, pp. 435-438.
"Characteristics of Leaky SAWs on 36-LiTaO.sub.3 in Periodic Structures of Heavy Electrodes", Plessky et al, 1993 Ultrasonics Symposium, pp. 1239-1242.
"Radiation Conductance and Grating Reflectivity Weighting Parameters for Dual Mode Leaky-SAW Resonators Filter Design", Edmondson et al, Proceedings of 1994 IEEE Ultrasonics Symposium, Nov. 1-4, 1994.

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