Research And Implement Of Passive Radar Antenna System

According to the assignment of the antenna system of the project named "aerial target recognization via passive radar",the dissertation analyzes and designs the antenna system using the substructure analyzing method of interconnect-net and its application research which is supported by the Nature Science Foundation of China.1.Because of the advanced performance and the important strategic station of the passive antenna in the future,and no the ready-made product at home, the research of the radar system is commenced actively. The paper analyzes and simulates some antennas and takes the log-periodic dipole antenna as the constitute of the passive radar antenna finally.2.The substructure analyzing method of interconnect-net is used in the microwave network through the research of the theory and arithmetic,which is based on the fast development of the computer technology and metrical technology.The passive radar antanna system is analyzed using this method,which solves the difficulties in the process of the antenna's design and makes it simple.3.It solves questions such as high FBR,high FSR,high gain and so on.By using of some special methods such as calculating farfield by using concept named threshold,the parameters'gradual changes in the design of antennas, not only the VSWR is very low ,but also the length of antenna is shorter than before.The function and usage of the software for analyzing the antenna system is introduced ,which has the friendly interface and well performance.4.Based on lots of experiments, research and test, the 1 : 1 experiment antenna and 1 : 5 reduced scale antenna is produced, and the passive radar antenna system is produced then successfully, whose performance is very well.It proves the validity and availability of the ointerconnect-net method and its application research in use of the antenna system, which will be of great theoretical value.The research results breaks through the blockage of vital technology abroad and will be of great economic value and application value in army. It takes advantage of next step of the passive radar system's analysis.