Characterization of an Implicitly Resistively-Loaded Monopole Antenna in Lossy Liquid Media
Microwave tomographic imaging of the breast for cancer detection is a topic of considerable interest because of the potential to exploit the apparent high-dielectric property contrast between normal and malignant tissue. An important component in the realization of an imaging system is the antenna...
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| Format: | Article |
| Language: | English |
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Wiley
2008-01-01
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| Series: | International Journal of Antennas and Propagation |
| Online Access: | http://dx.doi.org/10.1155/2008/580782 |
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| author | Colleen J. Fox Paul M. Meaney Fridon Shubitidze Lincoln Potwin Keith D. Paulsen |
| author_facet | Colleen J. Fox Paul M. Meaney Fridon Shubitidze Lincoln Potwin Keith D. Paulsen |
| author_sort | Colleen J. Fox |
| collection | DOAJ |
| description | Microwave tomographic imaging of the breast for cancer detection is a topic of considerable interest because of the potential to exploit the apparent high-dielectric property contrast between normal and malignant tissue. An important component in the realization of an imaging system is the antenna array to be used for signal transmission/detection. The monopole antenna has proven to be useful in our implementation because it can be easily and accurately modeled and can be positioned in close proximity to the imaging target with high-element density when configured in an imaging array. Its frequency response is broadened considerably when radiating in the liquid medium that is used to couple the signals into the breast making it suitable for broadband spectral imaging. However, at higher frequencies, the beam patterns steer further away from the desired horizontal plane and can cause unwanted multipath contributions when located in close proximity to the liquid/air interface. In this paper, we have studied the behavior of these antennas and devised strategies for their effective use at higher frequencies, especially when positioned near the surface of the coupling fluid which is used. The results show that frequencies in excess of 2 GHz can be used when the antenna centers are located as close as 2 cm from the liquid surface. |
| format | Article |
| id | doaj-art-1ad5002bb4be407e910ede7258b45dda |
| institution | Kabale University |
| issn | 1687-5869 1687-5877 |
| language | English |
| publishDate | 2008-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Antennas and Propagation |
| spelling | doaj-art-1ad5002bb4be407e910ede7258b45dda2025-02-03T01:02:12ZengWileyInternational Journal of Antennas and Propagation1687-58691687-58772008-01-01200810.1155/2008/580782580782Characterization of an Implicitly Resistively-Loaded Monopole Antenna in Lossy Liquid MediaColleen J. Fox0Paul M. Meaney1Fridon Shubitidze2Lincoln Potwin3Keith D. Paulsen4Thayer 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, USAThayer School of Engineering, Dartmouth College, Hanover, NH 03755, USAThayer School of Engineering, Dartmouth College, Hanover, NH 03755, USAMicrowave tomographic imaging of the breast for cancer detection is a topic of considerable interest because of the potential to exploit the apparent high-dielectric property contrast between normal and malignant tissue. An important component in the realization of an imaging system is the antenna array to be used for signal transmission/detection. The monopole antenna has proven to be useful in our implementation because it can be easily and accurately modeled and can be positioned in close proximity to the imaging target with high-element density when configured in an imaging array. Its frequency response is broadened considerably when radiating in the liquid medium that is used to couple the signals into the breast making it suitable for broadband spectral imaging. However, at higher frequencies, the beam patterns steer further away from the desired horizontal plane and can cause unwanted multipath contributions when located in close proximity to the liquid/air interface. In this paper, we have studied the behavior of these antennas and devised strategies for their effective use at higher frequencies, especially when positioned near the surface of the coupling fluid which is used. The results show that frequencies in excess of 2 GHz can be used when the antenna centers are located as close as 2 cm from the liquid surface.http://dx.doi.org/10.1155/2008/580782 |
| spellingShingle | Colleen J. Fox Paul M. Meaney Fridon Shubitidze Lincoln Potwin Keith D. Paulsen Characterization of an Implicitly Resistively-Loaded Monopole Antenna in Lossy Liquid Media International Journal of Antennas and Propagation |
| title | Characterization of an Implicitly Resistively-Loaded Monopole Antenna in Lossy Liquid Media |
| title_full | Characterization of an Implicitly Resistively-Loaded Monopole Antenna in Lossy Liquid Media |
| title_fullStr | Characterization of an Implicitly Resistively-Loaded Monopole Antenna in Lossy Liquid Media |
| title_full_unstemmed | Characterization of an Implicitly Resistively-Loaded Monopole Antenna in Lossy Liquid Media |
| title_short | Characterization of an Implicitly Resistively-Loaded Monopole Antenna in Lossy Liquid Media |
| title_sort | characterization of an implicitly resistively loaded monopole antenna in lossy liquid media |
| url | http://dx.doi.org/10.1155/2008/580782 |
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