NDLI: Realization of Integrated Miniature Ceramic Filters for 900 MHz Cellular Mobile Radio Applications

Content Provider	IEEE Xplore Digital Library
Author	Kemppinen, E. Hulkko, J. Leppavuori, S.
Copyright Year	1987
Description	Author affiliation: Nokia-Mobira Oy, R & D Oulu, Finland (Hulkko, J.) \|\| University of Oulu, Microelectronics Laboratory, Finland (Leppavuori, S.) \|\| Techlnical Research Centre of Finhland/Telecom, Espoo, Finland (Kemppinen, E.)
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 Ba2Ti9020 (¿r=37) and Ba (Sm, Nd)2Ti5O14 (¿r=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.
Starting Page	175
Ending Page	180
File Size	5317956
Page Count	6
File Format	PDF
DOI	10.1109/EUMA.1987.333739
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1987-09-07
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Ceramics Land mobile radio Resonator filters Band pass filters Conductors Microelectronics Laboratories Pulp manufacturing Telephone sets Costs
Content Type	Text
Resource Type	Article

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