Surface acoustic wave device

Details Surface acoustic wave device Surface acoustic wave device

1997-02-19

1998-01-06

Pascal, Robert

Wave transmission lines and networks

Coupling networks

Electromechanical filter

310313R, H03H 900

Patent

active

057059640

ABSTRACT:
To obtain a surface acoustic wave device which can be produced with ease at a low cost and can be reduced in size without causing deterioration of characteristics, a surface acoustic wave device having input and output transducers arranged alternately on the surface of a substrate for propagating a surface acoustic wave includes metal patterns provided outside the transducers along the extension line of the propagation path of the surface acoustic wave and having at least one surface inclined at an angle .theta. (5.degree.<.theta.<85.degree. or -85.degree.<.theta.<-5.degree.) with respect to the propagation direction of the surface acoustic wave.

REFERENCES:
patent: 4473888 (1984-09-01), Smith
patent: 5256927 (1993-10-01), Kato et al.
patent: 5304965 (1994-04-01), Manner
patent: 5336957 (1994-08-01), Yamanouchi et al.
patent: 5396200 (1995-03-01), Machui
patent: 5438306 (1995-08-01), Yamanouchi et al.

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