Development of Advanced Ceramic Systems for the Telecommunication Industry.
Participants: TKI-Ferrit Development and Manufacturing Ltd
H-1142 Budapest
Ungvár utca 64-66
www.tki-ferrit.hu
KŐPORC Development Ltd
H-1106 Budapest
Tárna utca 4.
Research Institute for Technical Physics and Material Sciences of
the Hungarian Academy of Sciences
H-1121 Budapest
Konkoly Thege út 29-33.
Head of the consortia: Dr. Anna Sztaniszlav
TKI-Ferrit Ltd.
Microwave ferrite devices are irreplaceable components for the telecommunication industry. Their transmission parameters (insertion loss, isolation, etc.) and working temperature range depend on the dielectric losses, microwave parameters, temperature dependence of the microwave parameters of the applied materials, such as the soft ferrites/garnets and dielectric ceramics, which are used as circuit components and/or tuning elements in the ferrite devices. The appropriate selection of the above mentioned two material systems gives possibility to develop ferrite devices with low (£0,50 dB) insertion losses and stable transmission parameters within a broad (-400C ¸+800C) temperature range.
The aim of this project is the harmonised development of the ferrite/garnet and ceramic dielectric systems to elaborate advanced ferrite devices with the above-mentioned parameters. The following material systems will be investigated: spinel ferrites ( MeFe2O4 ) / garnets (YFe5O12) with different substitutions and TiO2 based dielectrics.
The following developments will be performed:
· development of new chemical compositions,
· technological development by using advanced pressing methods to get homogeneous grain size distribution, high density materials, ferrite/garnets with very small grain sizes (for high power applications) and
· elaboration of new, high-sensitive investigation methods and new evaluation soft wares.
· theoretical study of the different material parameters on the transmission parameters of the ferrite devices.
Matching
· the temperature dependence of the saturation magnetisation of the ferrite/garnet systems and the temperature dependence of the dielectric constant of the ceramic dielectric,
· the dielectric constants of the ferrite/garnet materials and ceramic dielectrics,
· the dielectric losses of the ferrite/garnet materials and the ceramic dielectrics
give possibility to design and produce advanced, multifunctional microwave components for the telecommunication industry (GSM, TETRA, radar systems, etc.).