Surface acoustic wave device with anti-reflection electrode stru

Details Surface acoustic wave device with anti-reflection electrode stru Surface acoustic wave device with anti-reflection electrode stru

1984-07-05

1986-07-08

Salce, Patrick R.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310313B, 333194, H03H 942

Patent

active

045995320

ABSTRACT:
A surface acoustic wave device comprises a piezoelectric substrate, a pair of transducers provided on the piezoelectric substrate, a center electrode provided in the center between the both transducers, first shield electrode provided between one of the transducers and the center electrode, and second shield electrode provided between the other transducer and the center electrode, with placement substantially represented by: ##EQU1## where l.sub.1 is the width of the individual shield electrodes, l.sub.2 is the distance from the individual shield electrodes to the center electrode, .lambda..sub.0 is the wavelength of a surface acoustic wave at the center frequency, and n.sub.1 and n.sub.2 are whole numbers.

REFERENCES:
patent: 4005376 (1977-01-01), Davis
patent: 4204178 (1980-05-01), Mitchell
patent: 4281301 (1981-07-01), Stevens et al.
patent: 4340834 (1982-07-01), Sato

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