Accession Number : AD0418263

Title :   FERROELECTRIC CERAMIC FILTERS, IF TRANSFORMERS, AND NETWORKS.

Descriptive Note : Quarterly rept. no. 6, 1 Mar-31 May 63,

Corporate Author : CLEVITE CORP CLEVELAND OH

Personal Author(s) : Gerber, W. J. ; Curran, D. R.

Report Date : 16 JUL 1963

Pagination or Media Count : 1

Abstract : Research was continued towards the development of ferroelectric ceramic filters, intermediate frequency transformers, and networks. Energy trapping is proposed as an explanation for the behavior of high frequency AT-cut quartz resonators. Energy trapping gives a theoretical basis for the high Q sub m observed for quartz resonators mounted on low Q supports and for the low inter-resonator coupling observed for multiresonator wafers. Measurements in support of the energy trapping theory have been obtained with AT-cut quartz wafers by measuring inter-resonator coupling and the coupling between resonator and an absorbing edge of the wafer. Some improvement has been obtained in piezoelectric ceramic thickness resonators by using hot-pressing fabrication techniques. Results are discussed for three ceramic fabrication techniques. (Author)

Descriptors :   (*RADIOFREQUENCY FILTERS, CERAMIC MATERIALS), (*TRANSFORMERS, INTERMEDIATE FREQUENCIES), (*QUARTZ RESONATORS, THEORY), TRANSPORT PROPERTIES, PROPAGATION, ELECTRODES, MEASUREMENT.

Distribution Statement : APPROVED FOR PUBLIC RELEASE