| 摘要 |
<p>An antenna, preferably in the microwave range, comprising a Luneberg lens with a disc (10) having radially varying refraction index and provided with feeders (18 to 22) distributed around the circumference. Each feeder has the shape of a thin wire the projection of which, as seen radially relative to the centrum of the round disc, forms a straight line inclined 45° against the plane of the disc. All feeders are inclined in the same direction in its respective radial plane, whereby the feeaers (e.g. 22) opposite a regarded feeder (e.g. 18) will be oriented substantially perpendicular to the regarded feeder. Hereby they will permit passage of radiation to and from the regarded feeder and all the feeders can be activated simultaneously. Each feeder can be connected to a control unit by a coaxial cable (26) as indicated in the figure for the feeder (21).</p> |
