Diffraction of electromagnetic waves on the spiral elements

The diffraction of electromagnetic waves on the following structures: a single-pass cylindrical helix and the combination of left-and pravovintovoy cylindrical helix. The source of excitation acts linearly polarized plane wave vertical or horizontal polarization. The calculation is based on the integral representation of the electromagnetic field fine-wire structure, migrating to the surface of the radiating elements in the system of integral equations for the unknown current distributions. It is shown that the structure, which consists of combining left and pravovintovoy spirals, has a pronounced axial re-radiation, which is observed in a wide frequency.