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Microwave Dielectric Ceramics for Resonators and Filters in Mobile Phone Networks
Author(s) -
Reaney Ian M.,
Iddles David
Publication year - 2006
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2006.01025.x
Subject(s) - resonator , microwave , mobile phone , ceramic , materials science , permittivity , dielectric , bandwidth (computing) , engineering physics , dielectric resonator , optoelectronics , electronic engineering , telecommunications , dielectric loss , computer science , engineering , composite material
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.