The 2D electromagnetic modeling distribution of electric fields for stationary and non-stationary scattering process in the time domain mode was developed. The distributing system of the optical type was expressed. Given system allows to form 5-beam directional pattern (DP) for receiving active phased antenna radar (APAR). <p> </p>At reduction of the sizes of the distributing system, distance between its output reduce in once, in contrast with distance between radiators APAR. In such event corner deflections of the ray in DP APAR will corner of the deflection less in distributing system in n once also. For considered systems reduction factor of the geometric sizes n has formed the order 7. In corresponding to number once and was increased a corner of the deflection of the ray α in distributing system.
The results of numerical electrodynamic modeling and experimental research of slotted waveguide radiator is presented. The operational frequency was decreased on 25%. It was found that the differences between the experimental and calculated characteristics are associated with the following factors: the inaccuracy of manufacture of the geometric dimensions of the slotted waveguide radiator, methodical error of the finite element method in calculating the characteristics, inaccuracy of the values of the relative permittivity and magnetic permeability.