alexa A wideband microwave tomography system with a novel frequency selection procedure.
Engineering

Engineering

Journal of Electrical & Electronic Systems

Author(s): Gilmore C, Mojabi P, Zakaria A, Ostadrahimi M, Kaye C,

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Abstract In this paper, we describe a 2-D wideband microwave imaging system intended for biomedical imaging. The system is capable of collecting data from 3 to 6 GHz, with 24 coresident antenna elements connected to a vector network analyzer via a 2 x 24 port matrix switch. As one of the major sources of error in the data collection process is a result of the strongly coupling 24 coresident antennas, we provide a novel method to avoid the frequencies where the coupling is large enough to prevent successful imaging. Through the use of two different nonlinear reconstruction schemes, which are an enhanced version of the distorted born iterative method and the multiplicative regularized contrast source inversion method, we show imaging results from dielectric phantoms in free space. The early inversion results show that with the frequency selection procedure applied, the system is capable of quantitatively reconstructing dielectric objects, and show that the use of the wideband data improves the inversion results over single-frequency data. This article was published in IEEE Trans Biomed Eng and referenced in Journal of Electrical & Electronic Systems

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