Wave transmission lines and networks – Coupling networks – Delay lines including elastic bulk wave propagation means
Patent
1998-08-21
2000-09-19
Pascal, Robert
Wave transmission lines and networks
Coupling networks
Delay lines including elastic bulk wave propagation means
333147, 333149, 333150, 333186, 310328, 310334, H03H 936, H03H 946
Patent
active
061218561
ABSTRACT:
A bulk acoustic wave delay line is disclosed having a thin, amorphous metal substrate, and deposited on the first and second surface at each end of which is a very thin layer of a piezoelectric material. Positioned on each piezoelectric material layered area are a plurality of interleaved electrodes with a first portion of each plurality of electrodes being interconnected and a second portion of each plurality of electrodes being interconnected. The electrodes on the first and second surface at one end of said device are energized with electrical signals in a phased or un-phased manner to generate selected modes of pure Lamb waves in said substrate.
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patent: 4443731 (1984-04-01), Butler et al.
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patent: 5163435 (1992-11-01), Soldner et al.
patent: 5633616 (1997-05-01), Goto
Y. Mao et al.; "Switchable Single Mode Lamb Wave Transduction by Means of Both Side Excitation"; 1995 IEEE Ultrasonics Symposium; pp. 807-810, 1995.
Funk Joseph E.
Gomes David W.
Lockheed Martin Corporation
Pascal Robert
Summons Barbara
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