| 摘要 |
PROBLEM TO BE SOLVED: To conduct miniaturization, weight reduction, cost reduction, and the like of an electromagnetic lens antenna apparatus, comprising the combination of a reflection plate and a semi-spherical Luneberg lens. SOLUTION: A reflection plate 1 of the electromagnetic lens antenna apparatus is formed into such a shape that there is removed and is made absent in regions other than the portion, where the electromagnetic wave incident from the azimuth of a required scope is reflected, preferably into a sector. Then, a semispherical Luneberg lens 2 is preferably attached to the reflection plate 1 in a state with its being located close to the side of a small circular-arc edge 1b of the sector to make the antenna apparatus small-sized and compact.
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