Advantage of Token's Microwave Dielectric Components
New Microwave Dielectric Materials for Wireless Communication from Token Electronics
"Everything from the electromagnetic properties to microstructure of the material is important for the
A small ceramic component made from a dielectric material is fundamental to the operation of filters
and oscillators in several microwave systems, such as satellite TV receivers, military radar systems,
Global Positioning System (GPS) devices, and mobile communications. Token Electronics had been
able to develop specialized piezoelectric materials which lead to more reliable and clearer microwave
In microwave communications, dielectric components are used to discriminate between wanted and
unwanted signal frequencies in the transmitted and received signal. When the wanted frequency is
extracted and detected it is necessary to maintain a strong signal nevertheless. For clarity it is also
critical that the wanted signal frequencies are not affected by seasonal temperature changes.
The resonator materials for practical applications have to have certain key properties. A high relative
dielectric constant is needed so that the materials can be miniaturized and a high quality factor (Q) is
needed for improved selectivity. Low temperature variation of the material’s resonant frequency is also
required so that the microwave circuits remain stable.
Although large numbers of ceramic dielectric materials have been developed, it has proven difficult to
satisfy all these requirements in a single material at a reasonable cost. "Token takes the advantages of
these new materials that they are relatively cheap compared with some of the compounds currently
used and in the future they can be improved even further by suitable additives and by optimizing the
Dielectric Material Composition & Study
The new dielectric materials developed by Token, are based on ceramics formed by baking the pressed
powdered starting material mixture in a furnace at between 1200 and 1550 degrees Celsius.
Token Engineers used X-ray diffraction studies, Raman spectroscopy and scanning electron
microscopy to reveal the structure of the ceramics. The materials have the general formula
Ce(M1/2Ti1/2)O3.5. Ce is the element cerium, Ti is titanium and O is oxygen. "M" represents any one
of the metals magnesium, zinc, calcium, cobalt, manganese, nickel or tungsten. The numbers refer to
the proportions of each element in the ceramic.
"Further work is in progress to find the exact composition, internal structure and secondary phases in
Token's Service & PDF Catalogue Download
Token reliably deliver high-quality microwave dielectric components according to the each customer
special needs with respect to performance, costs, and technology modifications.
For marketing discontinuations or sourcing activities concerning dielectric products, you are
encouraged to contact our Sales Department so the request can be properly directed within Token.
Taiwan Factory: +886 2 29810109
China Factory: +86 755 26055363