Millimeter Accurate High-tech Research

As the advantage of the millimeter-wave, it is extremely attraction nowadays, especially in the military affairs.The content of this article is focus on ranging system in existence。 This paper studied several central systems used for ranging ,and compared them.Based on analyse of capability of triangle wave,this paper chose the linear frequency modulation continuous wave system, especially on the plan of the ranging system with invariable IF output ,as applied project.Based on the system design, we discussed and estimated the error of ranging, furthermore, the main influence factor to the range precision has been discussed, and corrected, imitated in the paper.Subsequently, discussion of the advantage and disadvantage of the the ranging system with invariable IF output has been included. Disadvantage of the design has been discussed.Also this paper has given some improve method of the design.