Experimental Investigation of Terahertz Scattering: A Study of Non-Gaussianity and Lateral Roughness Influence
The scattering phenomenon caused by rough surfaces has a dominant role in shaping the reflected field at terahertz (THz) frequencies, both in specular and non-specular directions. Most surfaces in nature are randomly rough, and the surface height obeys a certain statistical distribution. A Gaussian...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2020-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/9200906/ |
| _version_ | 1819132755216171008 |
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| author | Mai Alissa Benedikt Friederich Fawad Sheikh Andreas Czylwik Thomas Kaiser |
| author_facet | Mai Alissa Benedikt Friederich Fawad Sheikh Andreas Czylwik Thomas Kaiser |
| author_sort | Mai Alissa |
| collection | DOAJ |
| description | The scattering phenomenon caused by rough surfaces has a dominant role in shaping the reflected field at terahertz (THz) frequencies, both in specular and non-specular directions. Most surfaces in nature are randomly rough, and the surface height obeys a certain statistical distribution. A Gaussian probability density function (PDF) for height distribution is often considered, and the correlation length is assumed to be longer than the wavelength. However, a clear understanding of how changing these assumptions affect the angular distribution of the scattered field is still lacking. In the first part of this work we investigate via microscopic measurements the statistical distribution of realistic indoor materials, and its deviation from the assumed normal distribution. After that, the influence of non-Gaussianity on the specular reflection in the low THz region is shown analytically. In the second part, a measurement campaign of diffuse scattering, caused by structured statistically-controlled surfaces, is reported. The correlation length assumption has been proven experimentally and via full-wave simulation to affect the diffuse scattering by rough samples, when the other statistical parameters are kept without changes. |
| first_indexed | 2024-12-22T09:36:26Z |
| format | Article |
| id | doaj.art-176425cb81904307b8a1ca9e9788f5ea |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-22T09:36:26Z |
| publishDate | 2020-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-176425cb81904307b8a1ca9e9788f5ea2022-12-21T18:30:49ZengIEEEIEEE Access2169-35362020-01-01817067217068010.1109/ACCESS.2020.30253619200906Experimental Investigation of Terahertz Scattering: A Study of Non-Gaussianity and Lateral Roughness InfluenceMai Alissa0https://orcid.org/0000-0001-6680-0607Benedikt Friederich1Fawad Sheikh2https://orcid.org/0000-0003-4112-5988Andreas Czylwik3Thomas Kaiser4https://orcid.org/0000-0001-9679-5968Institute of Digital Signal Processing, University of Duisburg-Essen, Duisburg, GermanyChair of Communication Systems, University of Duisburg-Essen, Duisburg, GermanyInstitute of Digital Signal Processing, University of Duisburg-Essen, Duisburg, GermanyChair of Communication Systems, University of Duisburg-Essen, Duisburg, GermanyInstitute of Digital Signal Processing, University of Duisburg-Essen, Duisburg, GermanyThe scattering phenomenon caused by rough surfaces has a dominant role in shaping the reflected field at terahertz (THz) frequencies, both in specular and non-specular directions. Most surfaces in nature are randomly rough, and the surface height obeys a certain statistical distribution. A Gaussian probability density function (PDF) for height distribution is often considered, and the correlation length is assumed to be longer than the wavelength. However, a clear understanding of how changing these assumptions affect the angular distribution of the scattered field is still lacking. In the first part of this work we investigate via microscopic measurements the statistical distribution of realistic indoor materials, and its deviation from the assumed normal distribution. After that, the influence of non-Gaussianity on the specular reflection in the low THz region is shown analytically. In the second part, a measurement campaign of diffuse scattering, caused by structured statistically-controlled surfaces, is reported. The correlation length assumption has been proven experimentally and via full-wave simulation to affect the diffuse scattering by rough samples, when the other statistical parameters are kept without changes.https://ieeexplore.ieee.org/document/9200906/THz communicationscattering measurementsstatistically-controlled rough surfacesnon-Gaussian heights’ distributions |
| spellingShingle | Mai Alissa Benedikt Friederich Fawad Sheikh Andreas Czylwik Thomas Kaiser Experimental Investigation of Terahertz Scattering: A Study of Non-Gaussianity and Lateral Roughness Influence IEEE Access THz communication scattering measurements statistically-controlled rough surfaces non-Gaussian heights’ distributions |
| title | Experimental Investigation of Terahertz Scattering: A Study of Non-Gaussianity and Lateral Roughness Influence |
| title_full | Experimental Investigation of Terahertz Scattering: A Study of Non-Gaussianity and Lateral Roughness Influence |
| title_fullStr | Experimental Investigation of Terahertz Scattering: A Study of Non-Gaussianity and Lateral Roughness Influence |
| title_full_unstemmed | Experimental Investigation of Terahertz Scattering: A Study of Non-Gaussianity and Lateral Roughness Influence |
| title_short | Experimental Investigation of Terahertz Scattering: A Study of Non-Gaussianity and Lateral Roughness Influence |
| title_sort | experimental investigation of terahertz scattering a study of non gaussianity and lateral roughness influence |
| topic | THz communication scattering measurements statistically-controlled rough surfaces non-Gaussian heights’ distributions |
| url | https://ieeexplore.ieee.org/document/9200906/ |
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