Synthesis of circularly polarized field radiated by four electric dipoles located over square screen

摘要

The 3D vector problem of diffraction of the fields of two orthogonal pairs of in pairs parallel electric dipoles located parallel to a perfectly conducting infinitely thin square screen is solved. On the basis of developed fast algorithms the field and power patterns as well as polarization patterns of this antennas system in the entire observation space were calculated. It is shown that at the appropriately chosen the distances between the dipoles and the screen sizes the main lobes of the power patterns have axially symmetry at the observation angles ±70° from a normal to the screen. When the excitation currents of two pairs of dipoles being in quadrature the main pattern lobe of ellipticity σ of the field has axially symmetry at the angles ±45° and σ> 0.7.