Accession Number : ADP001550

Title :   Multipole SAW Resonator Filters,

Corporate Author : SPERRY RESEARCH CENTER SUDBURY MA

Personal Author(s) : Tanski,William J.

Report Date : 1982

Pagination or Media Count : 5

Abstract : We are engaged in the development of VHF multiple SAW resonator filters which are required to have high rejection levels (> 60 dB), filter Q values in the range of 4000, and low shape factors (approx. 4:1). Here we present the salient aspects of filter design and fabrication, and discuss experimental results. Our procedure utilizes the synthesis techniques developed by Matthaei plus detailed equivalent circuit analysis calculations to finalize each design. Inter-cavity coupling is by transducers or reflectors and the filter design is synchronous, that is; each cavity is set to resonate at the same frequency when coupled. Theoretical and experimental results are presented for several mulitpole configurations demonstrating the efficacy of the design and fabrication techniques. For example, six-pole filters have been produced with 7dB loss, 55 dB rejection, and an acceptable passband shape. (Author)

Descriptors :   *Frequency, Control, *Symposia, *Surface acoustic waves, *Filters, *Resonators, Frequency response, Cavities, Computations, Rejection, Experimental data, Experimental design, Reflectors, Acceptance tests, Acoustic filters

Distribution Statement : APPROVED FOR PUBLIC RELEASE