Accession Number : ADD009473

Title :   Method and Apparatus for Dispersive Signal Processing.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Ballato,Arthur D ; Mariani,Elio A

Report Date : 07 May 1982

Pagination or Media Count : 7

Abstract : The invention is an improved manufacturing technique for producing a certain class of Surface Acoustic Wave (SAW) devices, namely those having input and output transducers in close proximity. A much higher manufacturing yield results from eliminating the cutting of a slot in the substrate between input and output transducers as formerly done. This frequently destructive step is replaced by ion-milling of a deep groove between the ports and backfilling with a metal of proper configuration to provide electromagnetic shielding. The technique produces a new device that is at least equal to the prior art in rejection of unwanted couplings between input and output. (Author)

Descriptors :   *Patent applications, *Signal processing, *Surface acoustic wave devices, *Fourier transformation, Arrays, Compressors, Reflection, Transformations, Transducers, Output, Slots, Inventions, Photolithography

Subject Categories : Numerical Mathematics
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE