Accession Number : ADD011716

Title :   Microwave Bandstop Filter.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Ballato,A

Report Date : 09 May 1985

Pagination or Media Count : 126

Abstract : An acoustic surface wave device is configured as a bandstop filter. The device has groups of sinusoidal corrugations cut into the top surface of a piezoelectric substrate between the input and output sets of interdigital transducers. The groups of corrugations selectively scatter certain surface acoustic wave spectral components traveling between the input and output transducers. The scattered components are converted to bulk vibration and do not impinge upon the output transducer; other components travel from input to output transducer relatively undiminished. Thus, a band of scattered surface acoustic spectral components is filtered from the input spectrum.

Descriptors :   *PATENT APPLICATIONS, *SURFACE WAVES, *BANDSTOP FILTERS, INPUT, OUTPUT, PARTS, PIEZOELECTRIC MATERIALS, SCATTERING, SUBSTRATES, SURFACE WAVES, TRANSDUCERS, TRAVEL, VIBRATION

Subject Categories : Line, Surface and Bulk Acoustic Wave Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE