Abstract
Under the background of safety inspection,the key technologies of near-range passive millimeter wave focal plane array imaging are studied.The analysis of the system quasi-optics were carried out using fundamental Gaussian beam method combined with geometrical optics method.A multi-beam wide-angle scanning lens antenna was designed.A new dielectric rod antenna was devised,which is prone to be aligned in close arrays and provide good radiation to the lens.Miniaturized direct-detection radiometers were fabricated with high-sensitive in Ka-band.Experimental results of the 20-channel passive millimeter wave focal plane array imaging system are presented,which can be used to detect hidden objects on human bodies in near range indoors.
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