Abstract
In this paper, indirect microwave holographic imaging of concealed ordnance is demonstrated. The proposed imaging technique difiers from conventional microwave imaging methods in that it does not require the direct measurement of the complex fleld scattered from the imaged object but mathematically recovers it from intensity-only scalar microwave measurements. This brings the advantages of simplifying the hardware implementation and signiflcantly reducing the cost of the imaging system. In order to demonstrate the ability of the proposed technique to reconstruct good quality images of concealed ordnance, indirect microwave holographic imaging of a metallic gun concealed in a pouch is carried out for airport security imaging applications. It is demonstrated that good resolution amplitude and phase images of concealed objects can be recovered when back-propagation is applied.
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