| 摘要 |
PROBLEM TO BE SOLVED: To attain a radome in which a frequency band with less reflection becomes wider than in the conventional case in a single layer dielectric board radome used for antennas of a microwave band and a millimeter wave band. SOLUTION: The shape of the radome is made into the projected surface shape having an apex on one side of a surface including a mounting peripheral edge to the antennas. With such a structure, when the radome is mounted to the antennas, distance between an antenna opening surface and the radome is different by positions at the antenna opening surface, phases of reflected waves radiated from the antenna opening surface, a part of which is reflected on the radome and returned to the opening surface are different since distance propagated by the position on the opening surface is different. When the reflected waves are synthesized, a part to be offset is generated, and as a result, reflection becomes less in comparison with the case in which the reflected wave is reflected on a plane radome and returned in phase as in the conventional case. COPYRIGHT: (C)2010,JPO&INPIT
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