Title :
A Comparison of a Wide-Slot and a Stacked Patch Antenna for the Purpose of Breast Cancer Detection
Author :
Gibbins, David ; Klemm, Maciej ; Craddock, Ian J. ; Leendertz, Jack A. ; Preece, Alan ; Benjamin, Ralph
Author_Institution :
Dept. of Electr. & Electron. Eng., Univ. of Bristol, Bristol, UK
fDate :
3/1/2010 12:00:00 AM
Abstract :
A wide-slot UWB antenna is presented for intended use in the detection scheme being developed at the University of Bristol, based on the principle of synthetically focused UWB radar using a fully populated static array. The antenna´s measured and simulated, input and radiation characteristics are presented and compared to an existing, stacked patch antenna that has been designed for the same purpose. The results of this study show that the wide-slot antenna has excellent performance across the required frequency range. Compared to the stacked-patch antenna used in our previous array, the wide-slot antenna can be 3 times smaller (in terms of front surface). The compact nature of the slot antenna means that the detection array can be densely populated. Additionally, this new antenna offers better radiation coverage of the breast. For angles up to 60?? away from bore-sight radiated pulses are almost identical (fidelity >95%), whereas for the patch antenna fidelity falls to 58% at the angular extremes. This uniform radiation into the breast should result in focused images with low levels of clutter.
Keywords :
cancer; microstrip antenna arrays; microwave imaging; radar antennas; slot antenna arrays; tumours; ultra wideband antennas; ultra wideband radar; UWB radar; bore-sight radiated pulses; breast cancer detection; detection array; patch antenna fidelity; radiation characteristics; radiation coverage; stacked patch antenna; static array; wide-slot UWB antenna; Antenna arrays; Antenna measurements; Breast cancer; Cancer detection; Focusing; Patch antennas; Radar antennas; Radar detection; Ultra wideband antennas; Ultra wideband radar; Breast cancer; microwave radar; ultrawideband (UWB) antennas;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2009.2039296