Application of multistatic radar principles to short-range imaging

The problem of microwave imaging at close distances is considered with respect to resolution, density of measurement, focusing properties, and the means of removing ambiguities stemming from very thinly covered apertures. It is demonstrated that object areas of reasonable extent can be reconstructed using one focus, making possible the reconstruction of larger domains at moderate cost and complexity using only a few focusing centers. Frequency domain information must be used to achieve similar resolution in two dimensions. The circular receiver configuration is found to be optimum in terms of direction-independent resolution and sufficient multilobe suppression for the imaging of a full plane surrounding the imaging system.