| 摘要 |
PROBLEM TO BE SOLVED: To solve such the problem that axial symmetry deteriorates by diffraction caused at a projected part at the center of a subreflector even when directivity of a feed waveguide is axially symmetrical in the conventional ADE antenna. SOLUTION: The feed waveguide is provided with a choke, and the position and size of the choke are adjusted to control radiation directivity of the feed waveguide. Specifically, the diffraction at the apex of the subreflector is suppressed to obtain a feed antenna of the ADE antenna having the axial symmetrical directivity by suppressing a radiation level in the apex direction at the center of the subreflector by control of the directivity. COPYRIGHT: (C)2011,JPO&INPIT |
