Yeliseyeva N. DIFFRACTION OF ELECTRIC DIPOLE RADIATION ON SCREEN WITH COMPLEX SHAPE

The asymptotical diffraction theory of the arbitrary oriented Hertz dipole and halfwave vibrator fields on the perfectly conducting finite screens containing fragments of wedge-shaped surfaces is evolved. For typical infinitesimally thin flat rectangular, П- and Г- shaped screens of finite dimensions the 3D vector diffraction problem solutions are obtained. These solutions allowеd to compute at arbitrary separation vibrator from the screen the spatial distributions of the amplitude, phase and polarization characteristics of electromagnetic fields in far zone. They allowеd also to analyze in detail the influence of the diffracted fields on the directive gain, radiation and input resistance, resonant length of vibrator. It is shown that the side lengths ratio of the flat rectangular screen influences in the crucial manner on the field spatial distribution. It makes possible to redistribute effectively the energy of the electromagnetic field in surrounding space by a choice of the optimal side lengths ratio of the used screens.