Accession Number : AD0282835

Title :   FERROELECTRIC CERAMIC FILTERS, IF TRANSFORMERS, AND NETWORKS

Corporate Author : CLEVITE CORP CLEVELAND OHIO

Personal Author(s) : KONEVAL,D.J. ; CURRAN,D.R.

Report Date : 30 JUN 1962

Pagination or Media Count : 1

Abstract : Uni-Wafer filters with 5 and 7 dot-resonators per ceramic wafer were fabricated at 10 mc with pass bandwidths of 670 kc and 270 kc respectively. In each case the individual dot-resonator was tuned to frequency by adjusting the thickness of its electrodes by electroplating. Forward and reverse electroplating of silver on silver or copper base electrodes was used to shift characteristic frequencies by more than !400 kc. Vacuum deposition presents a second method for tuning resonators, with an improvement in resonant resistance over electroplating. From the literature on quartz resonators it was surmised that many of the techniques used in ceramic filters should also be applicable to quartz. This was demonstrated to be the case with the fabrication and testing of several narrow band quartz T-section ladder filters centered at 10 mc. (Author)

Descriptors :   *BAND PASS FILTERS, *INTERMEDIATE FREQUENCIES, *MINIATURE ELECTRICAL EQUIPMENT, *RADIOFREQUENCY FILTERS, *TRANSFORMERS, CAVITY RESONATORS, CERAMIC MATERIALS, DESIGN, ELECTRICAL NETWORKS, ELECTRODES, ELECTROLYTIC POLISHING, ELECTROPLATING, EVAPORATION, FERROELECTRIC MATERIALS, MANUFACTURING, PIEZOELECTRIC CRYSTALS, QUARTZ RESONATORS, TUNING DEVICES

Distribution Statement : APPROVED FOR PUBLIC RELEASE