Accession Number : ADD009391

Title :   Surface Acoustic Wave Substrate Having Orthogonal Temperature Compensated Propagation Directions and Device Applications.

Descriptive Note : Patent,


Personal Author(s) : O'Connell,Robert M

Report Date : 06 Apr 1982

Pagination or Media Count : 7

Abstract : The patent concerns surface acoustic wave devices such as reflective array compressors which utilize orthogonal propagation directions and are improved by employing a substrate member the surface acoustic wave propagation surface of which exhibits zero temperature coefficient of delay in two orthogonal directions. Temperature compensations means are eliminated and improved performance is realized by aligning the principal and secondary axes of propagation of the device with the zero temperature coefficient of delay directions. A single cut quartz substrate having its propagation surface defined by a plane coinciding with the Euler angles lambda equal 0.0 deg. mu equal 125.87 (+1-6) deg. theta equal 45./0 deg. enables realization of the concept with reflective array compressors and other reflective quartz devices.

Descriptors :   *Patents, *Surface acoustic wave devices, *Substrates, *Wave propagation, Temperature, Orthogonality, Reflectors, Quartz, Cutting, Arrays, Reflection, Compressors, Inventions

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE