Utilization of multiple frequencies in 3D nonlinear microwave imaging

The use of multiple frequencies in a nonlinear microwave algorithm is considered. Using multiple frequencies allows for obtaining the improved resolution available at the higher frequencies while retaining the regularizing effects of the lower frequencies. However, a number of different challenges a...

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Bibliographic Details
Published in2012 6th European Conference on Antennas and Propagation (EUCAP) pp. 1776 - 1779
Main Authors Jensen, P. D., Rubak, T., Mohr, J. J.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.03.2012
Subjects
Image reconstruction
Microwave antennas
Microwave imaging
Microwave measurements
Microwave theory and techniques
Permittivity
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Summary:The use of multiple frequencies in a nonlinear microwave algorithm is considered. Using multiple frequencies allows for obtaining the improved resolution available at the higher frequencies while retaining the regularizing effects of the lower frequencies. However, a number of different challenges arise when using data from multiple frequencies for imaging of biological targets. In this paper, the performance of a multi-frequency algorithm, in which measurement data from several different frequencies are used at once, is compared with a stepped-frequency algorithm, in which images reconstructed at lower frequencies are used as starting guesses for reconstructions at higher frequencies. The performance is illustrated using simulated 2-D data and data obtained with the 3-D DTU microwave imaging system.
ISBN:145770918X
9781457709180
ISSN:2164-3342
DOI:10.1109/EuCAP.2012.6206271