Detection of very small impurity particles in high-quality granulated sugar

This paper is about first fundamental investigations whether radar technology can detect smallest impurities in the production of high-quality granulated sugar. Based on some theoretical considerations the sensitivity of microwave interaction with some reference targets and some typical impurity particles is explored using a measurement setup at predominantly W band (75 - 110 GHz). In dependence of various adjustable parameters like bi-static angle, polarization, and frequency band a selection of suitable measurement configurations is finally discussed. The goal is to detect smallest impurities primarily inside and of course as well on the surface of a sugar heap.