W Band Imaging System Using Linear Sparse Periodic Antenna Array and Compressive Sensing for Personnel Screening

W Band Imaging System Using Linear Sparse Periodic Antenna Array and Compressive Sensing for Personnel Screening

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This paper presents our study on a W band imaging system consisting of a linear sparse periodic antenna array (SPA) with only little boys wetsuit 10 transmitting (Tx) and 10 receiving (Rx) elements in simulation and experiment for the purpose of personnel screening.We have devised a simplified and low cost experimental set-up using only 1 Tx and 1 Rx channels located on two scanning tracks separated by a distance to verify the proposed multi-static array imaging scheme.The simulation has taken account of the effects of track separation and measured antenna patterns.

The simulation and experiment correlate quite well, indicating a resolution of about 7 mm at 1.3 m distance.Furthermore, based on the experimental data, we have investigated the compressive sensing (CS) image reconstruction as an approach Nail Kit for further reducing the sampling points in such a multi-static array imaging system.

It is shown that using a discrete SPA-CS imaging algorithm, the images can be successfully reconstructed with the data as few as 30% of that used in the traditional holographic/synthetic aperture radar (SAR) imaging algorithm.Therefore, the CS image reconstruction is proved to be feasible for building a low-cost and fast millimeter wave imaging system.