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Journal of Sensors and Sensor Systems An open-access peer-reviewed journal
J. Sens. Sens. Syst., 7, 309-317, 2018
https://doi.org/10.5194/jsss-7-309-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Regular research article
20 Apr 2018
Non-destructive testing of arbitrarily shaped refractive objects with millimetre-wave synthetic aperture radar imaging
Ingrid Ullmann, Julian Adametz, Daniel Oppelt, Andreas Benedikter, and Martin Vossiek Institute of Microwaves and Photonics, Friedrich-Alexander University, Erlangen, 91058, Germany
Abstract. Millimetre-wave (mmW) imaging is an emerging technique for non-destructive testing. Since many polymers are transparent in this frequency range, mmW imaging is an attractive means in the testing of polymer devices, and images of relatively high resolution are possible. This contribution presents an algorithm for the precise imaging of arbitrarily shaped dielectric objects. The reconstruction algorithm is capable of automatically detecting the object's contour, followed by a material-sensitive reconstruction of the object's interior. As an example we examined a polyethylene device with simulated material defects, which could be depicted precisely.
Citation: Ullmann, I., Adametz, J., Oppelt, D., Benedikter, A., and Vossiek, M.: Non-destructive testing of arbitrarily shaped refractive objects with millimetre-wave synthetic aperture radar imaging, J. Sens. Sens. Syst., 7, 309-317, https://doi.org/10.5194/jsss-7-309-2018, 2018.

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Millimetre-wave radar is an emerging technique for non-destructive testing: it is less costly than X-rays and has no ionizing radiation. Compared to ultrasound it does not require the device under test to be immersed in water. This article presents methods for high-resolution millimetre-wave radar imaging without a priori knowledge of the object's shape. A polymer device with simulated material defects is examined, which could be depicted precisely.
Millimetre-wave radar is an emerging technique for non-destructive testing: it is less costly...
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