Surface Wave Multipath Signals in Near-Field Microwave Imaging
Microwave imaging techniques are prone to signal corruption from unwanted multipath signals. Near-field systems are especially vulnerable because signals can scatter and reflect from structural objects within or on the boundary of the imaging zone. These issues are further exacerbated when surface w...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2012-01-01
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| Series: | International Journal of Biomedical Imaging |
| Online Access: | http://dx.doi.org/10.1155/2012/697253 |
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| _version_ | 1832547428671160320 |
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| author | Paul M. Meaney Fridon Shubitidze Margaret W. Fanning Maciej Kmiec Neil R. Epstein Keith D. Paulsen |
| author_facet | Paul M. Meaney Fridon Shubitidze Margaret W. Fanning Maciej Kmiec Neil R. Epstein Keith D. Paulsen |
| author_sort | Paul M. Meaney |
| collection | DOAJ |
| description | Microwave imaging techniques are prone to signal corruption from unwanted multipath signals. Near-field systems are especially vulnerable because signals can scatter and reflect from structural objects within or on the boundary of the imaging zone. These issues are further exacerbated when surface waves are generated with the potential of propagating along the transmitting and receiving antenna feed lines and other low-loss paths. In this paper, we analyze the contributions of multi-path signals arising from surface wave effects. Specifically, experiments were conducted with a near-field microwave imaging array positioned at variable heights from the floor of a coupling fluid tank. Antenna arrays with different feed line lengths in the fluid were also evaluated. The results show that surface waves corrupt the received signals over the longest transmission distances across the measurement array. However, the surface wave effects can be eliminated provided the feed line lengths are sufficiently long independently of the distance of the transmitting/receiving antenna tips from the imaging tank floor. Theoretical predictions confirm the experimental observations. |
| format | Article |
| id | doaj-art-529655f1174b44f5802d8333e87b94fc |
| institution | Kabale University |
| issn | 1687-4188 1687-4196 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Biomedical Imaging |
| spelling | doaj-art-529655f1174b44f5802d8333e87b94fc2025-02-03T06:44:41ZengWileyInternational Journal of Biomedical Imaging1687-41881687-41962012-01-01201210.1155/2012/697253697253Surface Wave Multipath Signals in Near-Field Microwave ImagingPaul M. Meaney0Fridon Shubitidze1Margaret W. Fanning2Maciej Kmiec3Neil R. Epstein4Keith D. Paulsen5Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, USAThayer School of Engineering, Dartmouth College, Hanover, NH 03755, USAThayer School of Engineering, Dartmouth College, Hanover, NH 03755, USADepartment of Radiology, Dartmouth Medical School, Hanover, NH 03755, USAThayer School of Engineering, Dartmouth College, Hanover, NH 03755, USAThayer School of Engineering, Dartmouth College, Hanover, NH 03755, USAMicrowave imaging techniques are prone to signal corruption from unwanted multipath signals. Near-field systems are especially vulnerable because signals can scatter and reflect from structural objects within or on the boundary of the imaging zone. These issues are further exacerbated when surface waves are generated with the potential of propagating along the transmitting and receiving antenna feed lines and other low-loss paths. In this paper, we analyze the contributions of multi-path signals arising from surface wave effects. Specifically, experiments were conducted with a near-field microwave imaging array positioned at variable heights from the floor of a coupling fluid tank. Antenna arrays with different feed line lengths in the fluid were also evaluated. The results show that surface waves corrupt the received signals over the longest transmission distances across the measurement array. However, the surface wave effects can be eliminated provided the feed line lengths are sufficiently long independently of the distance of the transmitting/receiving antenna tips from the imaging tank floor. Theoretical predictions confirm the experimental observations.http://dx.doi.org/10.1155/2012/697253 |
| spellingShingle | Paul M. Meaney Fridon Shubitidze Margaret W. Fanning Maciej Kmiec Neil R. Epstein Keith D. Paulsen Surface Wave Multipath Signals in Near-Field Microwave Imaging International Journal of Biomedical Imaging |
| title | Surface Wave Multipath Signals in Near-Field Microwave Imaging |
| title_full | Surface Wave Multipath Signals in Near-Field Microwave Imaging |
| title_fullStr | Surface Wave Multipath Signals in Near-Field Microwave Imaging |
| title_full_unstemmed | Surface Wave Multipath Signals in Near-Field Microwave Imaging |
| title_short | Surface Wave Multipath Signals in Near-Field Microwave Imaging |
| title_sort | surface wave multipath signals in near field microwave imaging |
| url | http://dx.doi.org/10.1155/2012/697253 |
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