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A Talai, F. Steinhäußer, A. Bittner, U. Schmid, R. Weigel, K. Kölpin:
"A Permittivity Characterization Method by Detuned Ring-Resonators for Bulk Materials up to 110 GHz";
Talk: 44th European Microwave Conference, Rom, Italien; 10-06-2014 - 10-09-2014; in: "Proceedings of the 44th European Microwave Conference", IEEE, (2014), ISBN: 978-2-87487-035-4; 124 - 127.

An accurate characterization of microwave mate-
rials is essential for reliable high frequency circuit design.
This paper presents a measurement setup, which enables a
quick and accurate determination of the relative permittivity
of dielectric bulk materials up to 110 GHz. A ring-resonator
is manufactured on a well characterized substrate dealing as
reference resonator. The Material Under Test (MUT) is placed
on top of the ring, which increases the effective permittivity and
therefore introduces a shift of the resonance frequency of the
resonator. Electromagnetic field simulations with different heights
and relative permittivities of the MUT provide a lookup table
for the measured resonance frequencies. The functionality of the
proposed measurement setup is validated by measurement results
of different MUTs.

An accurate characterization of microwave mate-
rials is essential for reliable high frequency circuit design.
This paper presents a measurement setup, which enables a
quick and accurate determination of the relative permittivity
of dielectric bulk materials up to 110 GHz. A ring-resonator
is manufactured on a well characterized substrate dealing as
reference resonator. The Material Under Test (MUT) is placed
on top of the ring, which increases the effective permittivity and
therefore introduces a shift of the resonance frequency of the
resonator. Electromagnetic field simulations with different heights
and relative permittivities of the MUT provide a lookup table
for the measured resonance frequencies. The functionality of the
proposed measurement setup is validated by measurement results
of different MUTs.

Bulk material, Detuned resonator, Frequency shift, Material characterization, Permittivity, Ring-resonator