Piezoelectric transducer to generate bulk waves

Details Piezoelectric transducer to generate bulk waves Piezoelectric transducer to generate bulk waves

1989-08-01

1990-12-04

Jordan, Charles T.

Communications, electrical: acoustic wave systems and devices

Signal transducers

350358, 310334, 310365, H04R 1700

Patent

active

049758926

ABSTRACT:
The transducer is chiefly designed to generate acoustic waves in the microwave range in a crystalline support of a bulk wave delay line or a Bragg cell. The transducer has a plane contact region of a ground electrode partially covering a face of the substrate, a piezoelectric plate on the contact region and a second electrode defining the piezoelectrically active region of the transducer. So as not to make a direct solder on the electrode and thus, in particular, reduce the admittance of the transducer as compared with known transducers, the second electrode is connected to a large connection region, placed on the support face, by a link bridge. The connection region supports the connection by soldering. The admittance is thus independent of the thickness of the solder.

REFERENCES:
patent: 3453711 (1969-07-01), Miller
patent: 3587005 (1971-06-01), Fair
patent: 4611141 (1986-09-01), Hamada et al.
patent: 4666547 (1987-05-01), Snowden, Jr. et al.
patent: 4755708 (1988-07-01), Granz et al.
patent: 4800317 (1989-01-01), Ingle et al.
Patent Abstracts of Japan, vol. 3, No. 18 (E-91), Feb. 16, 1979, p. 6 E91; Masashi Makino, 12-18-78.
Microwave Journal, vol. 18, No. 9, Sep. 1975, pp. 44-47, Dedham, U.S.A.; A. Schaer et al.; "Soldered Piezoelectric Transducer Acoustic-Wave Components".

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