The paper is devoted to consideration of variants of solution to some problems of diffraction for printed arrays with anisotropic inhomogeneities. The rotation of the plane of polarization is realized by means of a twist-reflector. On the basis of computational and full-scale experiments it was shown that twist reflectors based on microstrip reflective type antenna arrays (RAA) can be quite broadband. The obvious advantage of such twist-reflectors is simplicity of the technology of their manufacture, small thickness and weight. In addition, in twist-reflectors based on printed RAA, it is possible to constructively realize the necessary phase distributions of the field on their surfaces. Thus, it becomes possible to use such twist-reflectors to create phase-correcting twistreflectors. It is shown that introduction of impedance loads in the construction of the re-radiating elements of the printed RAA opens additional possibilities for controlling the field scattered by it. Thus, twist reflectors with improved characteristics can be realized on the basis of microstrip-pin RAA. The results of numerical studies based on the author algorithms and computational programs are presented. Besides, spatial polarizing filters and a controllable twist-reflectors based on microstrip RAA are considered. If microstrip elements of a twist-reflector contain controllable loads, then qualitatively new type of the microwave device is formed. This device enables to control polarization of the scattered field. Such devices can be named by polarizing modulators or manipulators. By means of printed RAA with elements of complex topology the spatial polarizers, which can transform electromagnetic waves with linear polarization in waves with rotating polarization and, in particular, in waves with circular polarization, are realized
