A dual frequencies MMW holographic imaging system

A new MMW holographic system using dual frequencies for not only imaging hologram but also measuring distance automatically between a certain object and the system aperture is presented. Concretely, the scheme for the transmitter and receiver about it and the relative simulation are made, which show that for an object at an arbitrary distance to some extent the system presented here can work normally. Compared with the similar work done by the Pacific Northwest National Laboratory in USA, it can get the distance automatically and hence to put an object at a pre-known position is not a necessary condition any more.