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 O20 (εr =37) and Ba (Sm, Nd)2 Ti5 O14 (εr =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 language | English |
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Title of host publication | 17th European Microwave Conference |
Publisher | IEEE Institute of Electrical and Electronic Engineers |
Pages | 175-180 |
DOIs | |
Publication status | Published - 1987 |
MoE publication type | A4 Article in a conference publication |
Event | 17th European Microwave Conference - Rome, Italy Duration: 7 Sept 1987 → 10 Sept 1987 |
Conference
Conference | 17th European Microwave Conference |
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Country/Territory | Italy |
City | Rome |
Period | 7/09/87 → 10/09/87 |