| 摘要 |
An antenna, preferably operable in the microwave range, comprising a disc-shaped lens having a radially varying refraction index, and having feeders distributed around the circumference. Each feeder is in the shape of a thin wire having a projection which, as seen radially relative to the center of the disc, forms a straight line inclined 45 DEG relative to the plane sides of the disc. All feeders are inclined in the same direction relative to the center of the disc and thus all diametrically-opposed feeders are oriented substantially perpendicular to each other. Because of this orientation, radiation focussed by the lens passes to and from any active feeder without being substantially disturbed by other feeders, and a plurality of feeders can be active simultaneously. |
