Piezoelectric element

Details Piezoelectric element Piezoelectric element

1986-08-06

1988-07-26

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

310366, 333189, H03H 915, H03H 913, H03H 9205

Patent

active

047603585

ABSTRACT:
A three-terminal piezoelectric filter element includes a quadrilateral piezoelectric plate having first and second surfaces, a ring electrode deposited on said first surface at the periphery of said piezoelectric plate, a center electrode deposited on said first surface at an area within said ring electrode, and a ground electrode deposited on said second surface of said piezoelectric plate. The center electrode has four arms extending from the center of piezoelectric plate in a shape of the X along the diagonals of said piezoelectric plate. The ring electrode and the center electrode may be connected to define a two-terminal piezoelectric resonator element.

REFERENCES:
patent: 4628285 (1986-12-01), Nakatami et al.
Jumonji--"High-Impedance Piezoelectric Ceramic Resonators and Their Application to Ladder Filters", Electronics and Communications in Japan, vol. 53, No. 8, 1970; pp. 17-23.
"Webster's Seventh New Collegiate Dictionary", G & C Merriam Company, Publishers, Springfield, Mass., Copyright, 1965; p. 742 and Title Page.

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