The detection of concealed objects using microwave indirect holographic imaging (MIHI) techniques

This work describes a simple and inexpensive technique for the imaging of concealed objects. In place of traditional pulsed radar methods it offers an alternative CW method based on holographic intensity measurements. It demonstrates how indirect holographic techniques, employed at optical frequencies, can be adapted to image objects at microwave frequencies. It also demonstrates how 3D images may be reconstructed from measured two intensity patterns. Computer simulations using a simplified 1D conducting strip have provided encouraging results. Experimental results, also taken over a 1D scan above an aluminium strip, have indicated that this technique is capable of determining both the location and dimensions of the concealed object.