Accession Number : ADA115468
Title : Multipole Monolithic Surface Acoustic Wave (SAW) Resonator Filters.
Descriptive Note : Interim technical rept.
Corporate Author : SPERRY RESEARCH CENTER SUDBURY MA
PDF Url : ADA115468
Report Date : Apr 1982
Pagination or Media Count : 98
Abstract : We have successfully produced four- and six-pole SAW resonator filters for the first time, to our knowledge. The foundation for future development work has been established through the successful application of a synthesis technique, development of rapid analysis routines, and the application of our single-pole resonator design and fabrication techniques to multipole configurations utilizing transducer and reflector-coupling. Significant and critical innovations during this program include the techniques, through analysis, of determining the correct isolated-pole resonance frequency to effect a synchronously tuned filter, establishment of physical methods for determining and setting these frequencies, and the establishment of a technique for adjusting the coupling of a reflector-coupler. The response characteristics attained thus far meet only some of the performance criteria; notably: insertion loss, shape factor, bandwidths, and center frequencies. Problems remain in shaping the passband, improving the rejection level, and reducing leakage. We have outlined the work to be performed in phase II which is oriented towards solving these problems.
Descriptors : *Surface acoustic wave devices, *Resonators, *Tuned circuits, *Acoustic filters, Multiple operation, Very high frequency, Fabrication, Acoustic waves, Response, Electric filters, Frequency, Synthesis, Filters, Shape, Surface waves, Configurations, Bandwidth, Rejection, Insertion loss
Subject Categories : Line, Surface and Bulk Acoustic Wave Devices
Distribution Statement : APPROVED FOR PUBLIC RELEASE