| 摘要 |
PURPOSE:To erase a cross polarized wave component in terms of waving by using a main and a sub-reflecting mirror as a corrected mirror face obtaining an aperture distribution on demmand at the aperture of the main reflection mirror and using a focus reflecting mirror so as to cancel the cross polarized wave component generated in the corrected mirror surface. CONSTITUTION:A ray along the axis of a horn 1 as a primary radiator is reflected at a point directed toward a point Q0 on the focus reflecting mirror 7 as an offset mirror surface being a parabolic face and then goes toward space via a point S0' on the corrected sub-reflecting mirror 5 and a point M0' on the corrected main reflecting mirror 6. The reflecting mirrors 5, 6 are corrected mirror surfaces obtaining the aperture distribution on demand at the aperture of the reflecting mirror 6. The mirror surface parameter is selected so that the cross polarized wave component generated by the corrected mirror surface is cancelled by the cross polarized wave component generated by the reflecting mirror 7. Thus, the cross polarized wave component is cancelled in terms of wave. |
