Realization of integrated miniature ceramic filters for 900 MHz cellular mobile radio applications

Esa Kemppinen, Jaakko Hulkko, Seppo Leppävuori

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

4 Citations (Scopus)

Abstract

This paper discusses development work aimed at designing and manufacturing small integrated ceramic band-pass filters to be used in portable 900 MHz mobile radio telephone sets. Interdigital and comb-line types of filters investigated were made of Ba2 Ti9 O20r =37) and Ba (Sm, Nd)2 Ti5 O14r =78) ceramics. Miniaturization of the filters was possible by using irregular structures such as grooves or cuts between the resonators and by optimizing the number of band pass and band stop resonator elements. The simulated and measured responses of the filters after trimming were in reasonable good agreement. During the design small size, simple structures and low manufacturing costs of the filters were emphasized.
Original languageEnglish
Title of host publication17th European Microwave Conference
PublisherIEEE Institute of Electrical and Electronic Engineers
Pages175-180
DOIs
Publication statusPublished - 1987
MoE publication typeA4 Article in a conference publication
Event17th European Microwave Conference - Rome, Italy
Duration: 7 Sept 198710 Sept 1987

Conference

Conference17th European Microwave Conference
Country/TerritoryItaly
CityRome
Period7/09/8710/09/87

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