Accession Number : ADD009962

Title :   Method of Frequency Trimming Surface Acoustic Wave Devices.

Descriptive Note : Patent Application,


Personal Author(s) : Mariani,Elio

Report Date : 30 Dec 1982

Pagination or Media Count : 30

Abstract : The invention relates generally to the field of analog signal processing and frequency control and more particularly to surface acoustic wave devices and the resonant frequencies thereof. In the field of surface acoustic wave (SAW) devices, there is a need for precision frequency in high Q (mechanical response), narrowband SAW devices. It is well-known in the art that resonant devices of both bulk and surface acoustic wave varieties often age downward in frequency. It is highly desirable, therefore, to have a method of frequency adjustment that is capable of either positive or negative frequency adjustment. This may be done by the method of the instant invention. It is the object of this invention to provide a means for precisely trimming the resonance frequency of a surface acoustic wave device thereby changing the resonance frequency by a small fraction of the bandwidth. (Author)

Descriptors :   *Patent applications, *Polymeric films, *Polyimide resins, *Resonant frequency, *Microwave frequency, *Surface acoustic wave devices, Frequency modulation, Signal processing, Analog signals, Plastic deformation, Narrowband, Ultrahigh frequency, Curing, Hermetic seals, High temperature, Light pulses, Electron beams

Subject Categories : Line, Surface and Bulk Acoustic Wave Devices
      Electromagnetic Pulses

Distribution Statement : APPROVED FOR PUBLIC RELEASE