Title :
Crystal, ceramic, and mechanical filters in Japan
Author_Institution :
University of Tokyo, Tokyo, Japan
Abstract :
In Japan, there has been considerable activity in the research and manufacturing of quartz crystal filters, ceramic filters and mechanical filters. This paper reviews some of these contributions. An emphasis is placed on filters actually used. First multiple-mode resonators are reviewed; this concept having had profound effects on all types of filters. Quartz-crystal filters as well as other crystal filters are discussed. Then follow reviews on ceramic and mechanical filters.
Keywords :
Ceramics; Circuit analysis; Circuit theory; Ferroelectric materials; Filtering theory; MOS devices; Resonator filters; Surface acoustic waves; Transfer functions; Vibration measurement;
Journal_Title :
Proceedings of the IEEE
DOI :
10.1109/PROC.1979.11204
