Drobotov A. Optimization of radiation characteristics of ship antennas for radio communication satellite systems.

Two-mirror antenna mathematical model of which is taking into account as determined, and statistical performances. The work purpose - solution of the research problem radiation performances of two-mirror antennas in view of irradiating system disposition in Fresnel zone of a large mirror, and also evaluation of radiation field statistical performances of the one-dimensional and two-dimensional apertures at specific is field amplitude - phase distribution. The posed task solution is based on a solution of the Maxwell equations, in view of boundary conditions for is of field amplitude - phase distributions on small mirror, and also irradiating system disposition in Fresnel zone of large mirror. For an evaluation of inaccuracy influence of mirrors manufacture and statistical properties of real atmosphere the antennas statistical theory with application of turbulent atmosphere the Gauss model is used. The two-mirror antenna mathematical model a because of applications optical geometry of an approximation i s developed. The basic relations for the average directional diagram on a potency of the two-dimensional and one-dimensional apertures are obtained in view of influence of a specific aspect is field amplitude - phase distributions in the antenna aperture. The formulas for an evaluation of losses of directivity factor and amplification factor are obtained in view of statistical parameters of real atmosphere and inaccuracy of mirror manufacture. The basic outcomes of work have found a use at projection of ship satellite radio communication two-mirror antennas.