Quasi-optimization approach for millimeter wave imaging of multilayered dielectric media

Surya Prakash Singh, Nilesh Kumar Tiwari and M. Jaleel Akhtar

Journal of Electromagnetic Waves and Applications, 2018, vol. 32, issue 17, 2246-2258

Abstract: In this paper, a quasi-optimization approach involving a two-step method for the millimeter wave imaging of the stratified media is proposed. The proposed method makes use of reflection data of the test media in the mm-wave band of 26-40 GHz, whose equivalent time domain data are also available using the standard IFFT routines. In the first step, a simple analytical method is applied to extract the real permittivity and the physical thickness of each layer from time domain reflection data. In the second step, an efficient optimization method is proposed to extract material parameters of each layer more accurately from the spectral domain reflection coefficients. The extracted real permittivity and thickness of each layer from the first step provide a quite good estimated value for the next optimization process and thus overall computation time is considerably reduced. The proposed method is experimentally tested for a number of multilayered media comprising various materials.

Date: 2018
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DOI: 10.1080/09205071.2018.1503566

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