DIFFRACTION OF THE PLANE CIRCULARLY-POLAR IZED WAVES BY A GRATING MADE OF CIRCULAR-CYLINDERS WITH THE PERFECT SURFACE ELECTRIC AND MAGNETICCONDUCTIVITIES ALONG THE HELICAL LINES
En. Korshunova et al., DIFFRACTION OF THE PLANE CIRCULARLY-POLAR IZED WAVES BY A GRATING MADE OF CIRCULAR-CYLINDERS WITH THE PERFECT SURFACE ELECTRIC AND MAGNETICCONDUCTIVITIES ALONG THE HELICAL LINES, RADIOTEK EL, 41(8), 1996, pp. 911-914