Ultra wideband hemispherical microwave imaging system

Bakar, Aslina Abu and Bialkowski, M. E. (2010). Ultra wideband hemispherical microwave imaging system. In: Proceedings of: 2010 IEEE Antennas and Propagation Society International Symposium (APS/URSI). 2010 IEEE AP-S URSI International Symposium on Antennas and Propagation and CNC/USNC/URSI Radio Science Meeting, Toronto, ON, Canada, (1-4). 11-17 July 2010. doi:10.1109/APS.2010.5561884

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Author Bakar, Aslina Abu
Bialkowski, M. E.
Title of paper Ultra wideband hemispherical microwave imaging system
Conference name 2010 IEEE AP-S URSI International Symposium on Antennas and Propagation and CNC/USNC/URSI Radio Science Meeting
Conference location Toronto, ON, Canada
Conference dates 11-17 July 2010
Proceedings title Proceedings of: 2010 IEEE Antennas and Propagation Society International Symposium (APS/URSI)
Journal name 2010 IEEE International Symposium on Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting - Leading the Wave, AP-S/URSI 2010
Place of Publication Piscataway, NJ, U.S.A.
Publisher Institute for Electrical and Electronic Engineers (IEEE)
Publication Year 2010
Sub-type Fully published paper
DOI 10.1109/APS.2010.5561884
ISBN 9781424449675
1424449677
Start page 1
End page 4
Total pages 4
Collection year 2011
Language eng
Formatted Abstract/Summary
In recent years microwave techniques have attracted a considerable attention with regard to imaging various dielectric objects. A prominent example is a Ground Probe Radar and its recent extension “breast radar”. Our own interest is in using an active microwave technique to detect an early stage breast cancer. The advantage of microwaves is that only low power microwave signal is required to see the inside of breast. In one approach, the solution to a full-wave EM inverse scattering problem at single or multiple microwave frequencies is used to produce the distribution of dielectric constant of the imaged breast. Alternatively, an ultra wideband radar technique is applied to create an internal breast scatter image. In our previous work, we focused on using the monostatic radar approach to see the inside of a cylindrical dielectric body containing small cylindrical targets emulating the breast cancer. Other research groups such as at the Bristol University have reported results on multi-static ultra-wideband (UWB) radar for breast cancer detection.

This paper presents the design of an automated high resolution hemispherical imaging system employing ultra wideband microwave signals to see the inside of a breast phantom. In this system a set of ultra wideband antenna elements are offset from each other in the vertical and azimuth directions to minimize adverse effects of mutual coupling. Using this antenna array topology a high resolution hemispherical scan can be achieved just by rotating either the array antenna or the imaged object. Assuming the array is limited to four antenna elements, an ultra wideband (UWB) data for image reconstruction can be acquired by antennas connected to a 4-port vector network analyser. Both mono and multi-static radar modes can be achieved without using any additional switching matrix. Full design details of this scanning system are presented. An imaging example of a hemispherical object made out of agar imitating woman’s breast is reported.
©2010 IEEE
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Created: Fri, 04 Mar 2011, 13:48:59 EST by Professor Marek Bialkowski on behalf of School of Information Technol and Elec Engineering