CERAMIC COAXIAL RESONATORS
General characteristics
GENERAL CHARACTERISTICS
DIMENS IONS AND CONFIGURATIONS
The TEMEX coaxial resonators are available over a frequency range of 300 MHz to 6 GHz with four
preferred square cross section sizes, having side length of 2, 4, 6 and 12 m m .
Other square section dim ensions 3, 8 and 10 m m (S) inform ation can be obtained upon request.
Table 1 sum m arizes the choice of sizes and dielectric m aterials available.
The length of the com ponent (L) can be determ ined from the chosen frequency (F) and dielectric
constant (εr) as follows:
(λ/4 application)
(λ/2 application)
λo
L =
λo
L =
λo in m m
L in m m
F in GHz
4 √ εr
2 √ εr
300
F
with λo =
A sim plified form ula for λ /4 applications:
16.37
εr = 21
εr = 37
εr = 90
L =
L =
L =
F
12.3
F
7. 9
F
IMP EDANCE Z
The coaxial resonator im pedance used in TEM m ode is a direct function of its dim ensions
and of the dielectric m aterial perm ittivity.
Table 2 indicates for each standard side length, and for each dielectric constant, the im pedance value,
independent of the resonator length
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