|Pages||665 - 674|
|Number of pages||10|
|Journal||IEEE Transactions on Antennas and Propagation|
|Journal publication date||Mar 2010|
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 60Â° 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.
Sponsorship: The authors would like to acknowledge K. Stevens for help with the manufacture of the measurement setup and Prof. J. P. McGeehan for the provision of facilities at the Centre for Communications Research, University of Bristol.
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- breast cancer, microwave radar, ultrawideband (UWB) antennas