А.А. Volkov – Ph.D. (Eng.), Teacher of Faculty, MTSC Air Forces «MAA named professor N.E. Zhukovsky  and Y.A. Gagarin» (Voronezh) E-mail: volkov_aa@autorambler.ru

When solving the problem of electromagnetic defeat of radio-electronic means distributed over the earth's surface with the help of a high-power generator delivered to a given area on an air carrier, isotropic or flat surface antennas are often considered as field emitters. Due to the irrational distribution of the emitted field on a flat surface, these antennas do not allow to obtain acceptable dimensions of the electromagnetic defeat zone. One of the ways to increase these sizes is the use of antennas that allow rational distribution of the electromagnetic field in the area of location of radio-electronic means. The purpose of the article is to determine the type of antennas of powerful electromagnetic field generators, providing the largest radius of the electromagnetic defeat zone of the group of radio-electronic means distributed over the earth's surface, and to estimate the achievable values of this radius. To solve the problem, the dependence of the radius of the defeat zone on its angular size is obtained when observed from the radiation point, taking into account the radiation pattern of the emitter. The choice of type of antennas was made on the basis of the condition under which the specified dependence has the greatest value. As a result, it was found that the greatest radius of the defeat zone is provided by generators whose antennas have circular toroidal radiation patterns. The peculiarity of such antennas is the absence of restrictions in the possibility of increasing the radius of the zone of electromagnetic defeat by increasing the coefficient of directional action. Calculations and comparison of the achievable radius of the defeat zone for relativistic microwave generators with surface antennas of circular and cylindrical shape with uniform distribution of the exciting field are carried out. It is established that the most preferred are cylindrical surface antennas. For them, the radius of the electromagnetic defeat zone rise with increasing electrodynamic dimensions and the ratio of the length of the generatrix to the radius.

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