Analisys of cross-polarized radiation of optimized reflector antennas

Abstract

Thus, the analysis and minimization of the main types cross-polarized radiation of highly directional antennas in the millimeter and submillimeter ranges are relevant and important for many practical applications. Let us consider the formation process of the spatial distribution of cross-polarized radiation reflector antennas in the whole space of observation (not just in the major E-and H-planes). In [1] was shown that in the case of single-reflector axially symmetric parabolic reflector antennas the radiation of the transverse polarization is equal to zero in the direction of the main beam on the basic polarization, as well as in the principal planes of observation. In this case, the maximum levels of cross-polarized radiation occur in the observation planes φ = ±45°. It is easy to show that this result can be generalize for all types of aperture antennas and field distribution is similar to elementary aperture radiator - Huygens radiator. Indeed, according to the rule of directional patterns multiplication, the directional pattern zeros of the elementary radiator in cross-polarized component automatically provides all zeros of the antenna radiation pattern in the same planes of observation.