Wide band surface acoustic wave filter having constant thickness

Details Wide band surface acoustic wave filter having constant thickness Wide band surface acoustic wave filter having constant thickness

1989-06-22

1991-12-24

LaRoche, Eugene R.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

310313B, 310313A, 333196, H03H 964

Patent

active

050756524

ABSTRACT:
In a wide band surface acoustic wave filter having a multilayered structure, in which an elastic substrate and a piezoelectric thin film are combined, transducers are so constructed that the period of electrodes thereof varies in the direction perpendicular to the propagation direction of the surface acoustic wave.

REFERENCES:
patent: 4449107 (1984-05-01), Asai et al.
patent: 4480209 (1984-10-01), Okamoto et al.
patent: 4516049 (1985-05-01), Mikoshiba et al.
patent: 4600905 (1986-07-01), Fredricksen
patent: 4625184 (1986-11-01), Niitsuma et al.

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