The Effect of Range on Close-Range Millimeter-Wave Imaging Systems

The effect of range distance in millimeter-wave imaging is explored in this paper. The established physical model treats the incident and scattered signals as plane waves, and this has been applied successfully for some years. However, this model does not fully account for propagation loss, and it is shown in this paper that this can lead to a degradation in the results for multiple objects when they are at different ranges from the source. It is shown that, when using the established algorithm for image reconstruction in a monostatic system, it is more difficult to correctly image multiple objects when they are at different ranges.