Surface acoustic wave grating

Details Surface acoustic wave grating Surface acoustic wave grating

1978-01-16

1979-04-24

Smith, Alfred E.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

333193, 333153, H03H 902, H03H 932, H03H 926

Patent

active

041514920

ABSTRACT:
A reflective grating for a surface acoustic wave device is formed of interleaved sets of contiguous metal strips deposited on the surface of the device. The metal in one set of the strips has a density greater than that of the acoustic propagating medium of the device while the metal of the second set of strips has a density essentially equal to that of the acoustic propagating medium of the device. Typically, a piezoelectric material such as a crystal of quartz or a crystal of lithium niobate is utilized as the base material of the device with the grating being formed of an overlay of alternating strips of gold and aluminum.

REFERENCES:
patent: 3946338 (1976-03-01), Schmidt
patent: 3961293 (1976-06-01), Hartmann et al.

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