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Permittivity Determination by Polarimetric MMW Radiometry

Peichl, Markus and Dill, Stephan (2020) Permittivity Determination by Polarimetric MMW Radiometry. 9th International Workshop on Terahertz Technology and Applications, 2020-03-03 - 2020-03-04, Kaiserslautern, Germany.

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The characterization of dielectric materials is of great importance for many applications, being for instance quality control during product fabrication, status control of outside constructions over time or determination of ground properties for agricultural purposes. In many outside situations the objects of interest have limited accessibility, the investigation has to be done without destruction of any part of the object, or large areas have to be characterized by automatic operation. The use of microwaves, millimeter-waves or THz waves offers some penetration capability into matter, depending on its chemical and physical decomposition and of course frequency. Many objects of interest consist of a dielectric coating or enclosure, which can electromagnetically be treated as a dielectric layered structure or a dielectric slab surrounded by air. In previous work an approach has been established using polarimetric millimeter-wave radiometry for extracting the real part of the permittivity of surfaces, being the fundamental quantity for many higher level data products. Hereby an imaging radiometer scanner has been used to measure the first three components of the Stokes vector of a scene containing various targets of interest. Those are for instance plane surfaces being tilted such that cold sky radiation is reflected towards the radiometer. Results of various experiments and first error estimation are presented and discussed.

Item URL in elib:https://elib.dlr.de/134242/
Document Type:Conference or Workshop Item (Poster)
Title:Permittivity Determination by Polarimetric MMW Radiometry
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Peichl, MarkusUNSPECIFIEDhttps://orcid.org/0000-0003-0226-9786UNSPECIFIED
Dill, StephanUNSPECIFIEDhttps://orcid.org/0000-0001-6048-1107UNSPECIFIED
Date:14 March 2020
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:permittivity estimation, millimeter-wave radiometry, polarimetric, Stokes parameter, brightness temperature, Fresnel reflection coefficient, imaging
Event Title:9th International Workshop on Terahertz Technology and Applications
Event Location:Kaiserslautern, Germany
Event Type:international Conference
Event Start Date:3 March 2020
Event End Date:4 March 2020
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Security-relevant Earth Observation
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Reconnaissance and Security
Deposited By: Peichl, Dr.-Ing. Markus
Deposited On:20 Mar 2020 11:36
Last Modified:24 Apr 2024 20:37

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