Study On The Antenna Techniques And Method Of Location Of Passive Radar Seeker

In the modern war, the density of EM signal is higher and higher, Electronic Counter Measures(ECM) and electronic strike has been crueler and crueler. It is a very urgent task to destroy the enemy and to survive during the war. Being no radiation source, anti-radiation-missile has the characteristic of concealment, stronger ability of Anti-ECM and longer working distance, it has stronger vitality during the war, therefore it has been thought much of since it came out. Being an important parts of anti-radiation-missile, the passive radio seeker has been a important subject of study for a long time. In the thesis, first of all, the differ of several direction measured system was discussed. For every system has the different require to the antenna system. By comparing the different requirement to antenna system of every kind direction measured system. which kind antenna would be used is decided.. Then, the project of physical size of Passive Radio Seeker was discussed. The structure of antenna directly decide the radio characteristic of the antenna. By analyzing the influence of every parts of the antenna, at last the size of Passive Radar Seeker is decided. The model in HFSS was set, and simulation was made. Thirdly, as the common structure can not met the usage in working, the improving method of spiral antenna was discussed. This improving include two sides: the backed cavity and the spiral. These method can improve the characteristic of antenna effectively. Further more, the usage area of the antenna is widely extended. Fourthly, as a major task of the Passive Radar Seeker, the method of passive detection and location algorithms under the conditions of single platform was discussed. Kalman Filter Theory is the most used theory in target location, The simulate show that some advance algorithms based on Kalman Filter Theory can get a more accurate and rapid result. At last, the summary is made and the main results are given..