Browsing by Author "Saed M."

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    Microwave imaging with a time-reversed finite-difference time-domain technique
    (Taylor and Francis Ltd., 2014) Bardak C.; Saed M.
    A novel approach to microwave imaging in three dimensions based on time-reversed finite-difference time-domain method (FDTD-TR) is presented. The proposed computationally efficient technique allows the reconstruction of detailed images of scattering objects. Transmissions as well as reflection imaging modalities in the near-field and far-field were investigated. In this study, we implemented the FDTD-TR algorithm in three dimensions using time-reversed convolutional perfectly matching layers as boundaries to truncate the simulation domain. The method works for dielectric as well as conducting objects. The methods capabilities in imaging multiple objects and behind-the-wall imaging are also presented. © 2014 © 2014 Taylor & Francis.
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    Imaging multiple objects with time-reversed FDTD method at microwave range
    (Institute of Electrical and Electronics Engineers Inc., 2015) Bardak C.; Saed M.; Tas̈kln S.
    A simulation technique is presented for imaging multiple objects in microwave region. The proposed technique is based on the time-reversed finite-difference time-domain method (FDTD-TR) in three dimensions. Using this technique, not only the locations of objects but also their detailed images can be obtained. The method is capable of imaging hidden objects with transmission as well as reflection imaging modalities in the nearfield and far-field. The proposed technique is computationally efficient due to using a much smaller data set compared to conventional FDTD-TR imaging techniques where the entire time span of the captured data is reversed. The method was validated using experimental results as well as simulations. © 2015 IEEE.