Accession Number : ADD011718

Title :   Microwave SAW (Surface Acoustic Wave) Monochromator.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Ballato,A

Report Date : 24 May 1985

Pagination or Media Count : 134

Abstract : An acoustic surface wave device is configured as a bandpass filter. The device has similar groups of sinusoidal corrugations cut into portions of both the top and bottom surfaces of an otherwise flat piezoelectric substrate. A pair of input interdigital transducers is located upon one end of the top flat surface of the substrate. A similar pair of output interdigital transducers is located on the bottom flat surface of the substrate at the end opposite the input interdigital transducers. When an input RF spectral signal is applied to the input interdigital transducers, the transducers convert the electrical signal spectrum to a surface acoustic wave spectrum. When the surface acoustic wave spectrum strikes the corrugations cut into the top surface of the substrate, the corrugations selectively scatter certain spectral components into bulk vibration. The bulk vibration strikes the similar corrugations located upon the bottom of the substrate and the bulk vibratory energy is efficiently reconverted to surface acoustic vibration which propagates along the bottom surface of the substrate.

Descriptors :   *PATENT APPLICATIONS, *ACOUSTIC EQUIPMENT, *SURFACE WAVES, *SURFACE ACOUSTIC WAVES, *ACOUSTIC WAVES, BANDPASS FILTERS, BOTTOM, BULK MATERIALS, ELECTRICITY, INPUT, OUTPUT, PARTS, RADIOFREQUENCY, SIGNALS, SPECTRA, SUBSTRATES, SURFACES, TRANSDUCERS, VIBRATION

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE