Microwave Dielectric Ceramics for Resonators and Filters in Mobile Phone Networks

Temperature‐stable, medium‐permittivity dielectric ceramics have been used as resonators in filters for microwave (MW) communications for several decades. The growth of the mobile phone market in the 1990s led to extensive research and development in this area. The main driving forces were the great...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2006-07, Vol.89 (7), p.2063-2072
Main Authors: Reaney, Ian M., Iddles, David
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Cell phones
Ceramic industries
Ceramic resonator oscillators
Ceramics
Chemical industry and chemicals
Dielectric constant
Dielectrics
Electrotechnical and electronic ceramics
Exact sciences and technology
Frequencies
Microwave communications
Microwaves
Mobile communications networks
Permittivity
Resonators
Tables
Technical ceramics
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Summary:Temperature‐stable, medium‐permittivity dielectric ceramics have been used as resonators in filters for microwave (MW) communications for several decades. The growth of the mobile phone market in the 1990s led to extensive research and development in this area. The main driving forces were the greater utilization of available bandwidth, that necessitates extremely low dielectric loss (high‐quality factor), an increase in permittivity so that smaller components could be fabricated, and, as ever in the commercial world, cost reduction. Over the last decade, a clear picture has emerged of the principal factors, that influence MW properties. This article reviews these basic principles and gives examples of where they have been used to control microwave properties and ultimately develop new materials.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1551-2916.2006.01025.x