PLANAR ANTENNA
PROBLEM TO BE SOLVED: To provide a planar antenna, usable for both right and left circular polarization, capable of reducing an antenna area while obtaining the number of elements for obtaining required gain.SOLUTION: The planar antenna includes: an upper surface conductor 3; a plurality of radiatio...
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| Sprache: | eng ; jpn |
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| Zusammenfassung: | PROBLEM TO BE SOLVED: To provide a planar antenna, usable for both right and left circular polarization, capable of reducing an antenna area while obtaining the number of elements for obtaining required gain.SOLUTION: The planar antenna includes: an upper surface conductor 3; a plurality of radiation elements 2 concentrically arranged in a radial direction at an interval shorter than a free space wave length; and a radial in-phase feed line 4, having a conductor wall 7 which is rotationally symmetric with respect to a center axis of the upper surface conductor 3 extending from between the radiation elements 2, for radially feeding power in phase to the radiation elements 2 from a circular wave guide 6.SELECTED DRAWING: Figure 1
【課題】本発明は、右旋・左旋の両円偏波で共用可能であって必要となる利得を得る素子数を得ながらアンテナ面積を小さくすることが可能となる平面アンテナを提供する。【解決手段】上面導体３と、上面導体３上に、径方向に自由空間波長より短い間隔の複数の同心円状に配置された放射素子２と、放射素子２の間から延伸する上面導体３の中心軸に対して回転対称な導体壁７を有し円形導波管６から放射状に放射素子２に同相で給電する放射状同相給電路４と、を有している。【選択図】 図１ |
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