Modeling of Guidance Signal of Anti-radiation Missile in the Case of Multiple Sources

Anti-radiation missile (ARM) is a kind of powerful weapon with the functions of detecting, interference and destroying, which can attack and destroy enemy\´s radar and electronic facilities. Along with the development of science and technology, ARM technique obtained new breakthrough, resulting in the more serious threat to the radars on modern battlefield. How to counter ARM has already caused all countries\´ attention. Now various methods to counter ARM has been proposed, such as, warning of the ARM\´ attack, adopting low probability intercept radar, decoying the ARM with baiting sources, destroy the ARM with luring missile. Among them, decoy ARM with baiting sources is an efficient way. The technique had been used on the United States\´ "Patriot" to counter ARM. In this paper, a model of synthesis electromagnetic field under the action of multiple sources has been deduced. Under the spherical coordinate system of ground radar station, equiphase surface gradient vector equations have been established. Based on the relation of rectangular coordinate system and spherical coordinate system and the relation of the body coordinate system and ground radar coordinate system, the guidance signal model of ARM has been formed