| 摘要 |
<p>A radio wave lens antenna apparatus using a radio wave lens formed by combining a semispherical Luneberg lens and a reflection plate, where good electric characteristics of the antenna apparatus are maintained for a long period. To achieve this, a lens cover for covering the surface of the lens is stably fixed to the reflection plate. The antenna apparatus has a semispherical Luneberg lens (3), a semispherical shell-shaped lens cover (4) for covering the surface of the lens, a radio wave reflection plate (2), a ring-like plate (5) placed along the outer circumference of the lens (3), a primary radiator placed at the focal point of the lens, and a holding section for the primary radiator. A flange (4a) provided at the opening end of the lens cover (4) is clamped by the reflection plate (2) and the plate (5) to fix the lens cover (4) to the reflection plate (2), and more preferably, the lens cover (4) is caused to be in contact with the lens (3), and the lens (3) is pressed also in the radial direction by the plate (5) via the lens cover (4).</p> |
