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This article has been accepted for publication in a future issue of this journal, but has not been fully edited. Content may change prior to final publication. Citation information: DOI 10.1109/TTHZ.2020.3008330, IEEE
Transactions on Terahertz Science and Technology
IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY, VOL. XX, NO. XX, APRIL 2020
1
Guided Reflectometry Imaging Unit using
Millimeter Wave FMCW Radars
M. Pan, A. Chopard, F. Fauquet, P. Mounaix*, J.-P. Guillet*
Abstract—Frequency Modulated Continuous Wave (FMCW)
radar systems in the millimeter and sub-millimeter range are
technologically mature for many applicative fields such as au-
tomotive and aerospace industries for imaging and non de-
structive testing. This work reports on a new implementation
of a guided FMCW radar reflectometry unit for sensing and
imaging applications. Only a terahertz dielectric waveguide is
used for signal transmission between the transceiver module
and the sample, thus drastically simplifying the experimental
setup. Compared to continuous wave guided systems, one of
the main advantages granted by the use of FMCW radars in
combination with waveguides, is the differentiation capability
between the reflected signals generated along the wave guide
as parasitic signals or at its probing end as sensing information
and therefore improving the expected signal-to-noise ratio. This
innovative approach is demonstrated by using a dielectric hollow-
core waveguide integrated with two different radar transceivers;
the high-performance, III-V based 100 GHz SynView unit as a
reference system and a compact, low-cost, PCB-Integrated, 122
GHz transceiver developed by Silicon-Radar GmbH. Both 3D
electromagnetic simulations and raster scans are performed to
investigate quantitatively the propagation behaviors including the
coupling c