Methods of antenna and «antenna- radome» system analysis based on amplitude and phase measurements of their far field spherical components
The main principles of electric intensity recovery of electrical field in tested antenna aperture or in the «antenna radome» system radome-close aperture field (false aperture) by amplitude and phase long-range measurements are proposed. Measurements zone means a part of the spherical surface that envelopes analyzed antenna, the boarder of this surface are determined by the kinematic scheme of rotary joint of the scanner. Recovery of amplitude and phase distribution of the field in a flat aperture area or on the plane where array irradiators are located is used in case of wave diagnostics of such type of antennas. It is proposed to use the recovered phase distribution in a false aperture for a phase correction on phased array irradiators in order to compensate phase errors appeared because of the radome. The method of radome dielectric permittivity is discussed.