Mechanical filter

Details Mechanical filter Mechanical filter

1985-08-26

1986-12-30

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

310359, 310366, 333189, 333192, H03H 956, H03H 958

Patent

active

046332049

ABSTRACT:
A mechanical filter having as its major part at least one longitudinal vibration mode vibrator, includes a piezoelectric ceramic plate an electrode pair attached to top and bottom surfaces thereof. The piezoelectric ceramic plate is polarized in its thickness direction to form at least two polarized regions, the polarization directions being different from each other.

REFERENCES:
patent: 3736446 (1973-05-01), Berlincourt et al.
patent: 4281298 (1981-07-01), Gounji et al.
patent: 4336510 (1982-06-01), Miyamori
patent: 4503352 (1985-03-01), Inoue
patent: 4555682 (1985-11-01), Gounji et al.
"The Journal of the Institute of Electronics and Communication Engineers of Japan", vol. 53-A, No. 4, FIG. 2 on p. 178, published on Apr. 1970.

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