Field Distribution Features of Linearly Polarized Field of Plane Aperture

In this study, we describe the specific features of near-field distribution a uniformly illuminated aperture. An analytical method based on physical optics in time domain is used to calculate field intensity. The primitive impulse response function makes it possible antenna. difference amplitudes fields during observation point shift along X and Y coordinate axes can reach up 13% their maximum relative values. This should be considered when calculating antenna radiation patterns. At end paper, present results comparison obtained using three methods: geometrical theory diffraction (GTD), plane wave spectrum approach (PWS), (IRF) method. near relatively small apertures (with respect wavelength), all compared methods (GTD, PWS, IRF) were very similar. IRF method, which are given much more effective terms computer resources than approach, even geometric