Accession Number : ADA131002

Title :   Etched Cavity SAW (Surface Acoustic Wave) Resonator Elements for Multipole Filter Applications.

Descriptive Note : Final technical rept. 1 Jul 81-28 Feb 83,

Corporate Author : R F MONOLITHICS INC DALLAS TX

Personal Author(s) : Kansy,R J

PDF Url : ADA131002

Report Date : Jun 1983

Pagination or Media Count : 81

Abstract : The objective of this program is the evaluation of a unique Surface Acoustic Wave (SAW) resonator element proposed by RF Monolithics for applications in multipole bandpass filters. The economical realization of multipole SAW resonator filters having steep skirts, low loss, and high out-of-band rejection requires the availability of SAW resonator elements having specific attributes: (1) reproducibility, (2) high coupling, (3) single moded, and (4) high Q. The resonator element studied during this program was invented to satisfy these requirements. The key features of this new device are: (1) a uniform SAW velocity throughout the structure that reduces sensitivity to variations in the fabrication process, (2) independent realization of transduction and reflection functions that allow high coupling and good longitudinal mode suppression, and (3) a self-aligned multilevel process that eliminates critical alignments and promises high producibility in a volume manufacturing environment.

Descriptors :   *Surface acoustic wave devices, *Resonators, *Bandpass filters, *Monolithic structures(Electronics), Coupling(Interaction), Radiofrequency, Reflection, Multipolarity, Production, Environments, Suppression, Reproducibility, Functions, Manufacturing, Filters, Low loss, Volume, Fabrication, Skirts

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE