We investigated the dependence of angular dispersion of replica on its distance from the master polarization diffraction grating (PDG). The distribution of field diffracted on master PDG was calculated using the method of finite-difference time-domain. According to the numerical model, within the transition region, conditioned by interference of secondary waves with the same polarization state, the angular dispersion of replica changes depending on the distance between master and replica. Outside the transition region, the angular dispersions of replica and master completely coincide. The experimental investigation was also carried out, the results of which are in good agreement with the calculated data.