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US 5,063,389 AGranted
Antenna system with adjustable beam width and beam orientation
AssigneeHollandse Signaalapparaten B.V.
InventorBernard J. Reits
Life of this patent
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Abstract
The antenna system is provided with at least one active radiation source (1) and a reflective surface (2), which is located in at least one part of the radiation (3) generated by the active radiation source (1). The reflective surface (2) is provided with a number of independently adjustable plates (2.j) for generating at least one radiation beam. The antenna system may be provided with means (4) to independently adjust the plates (2.j) for the purpose of (dynamically) orientating the antenna beam.
Claims21
An antenna system comprising:
- an active radiation source having a wavelength .lambda.;
- a substantially flat, contoured surface formed by a plurality of separate and independently adjustable adjacent reflecting plates having transverse dimensions on the order of the wavelength .lambda. positioned for reflecting the radiation and forming at least one radiation beam;
- and
- adjusting means for dynamically translating the plates with respect to each other during operation of the antenna system, thereby determining the antenna beam pattern;
- wherein, for orienting at least one beam, the plates are arranged in groups of plates for which the mutual difference in radiation path distance from the active radiation source to two adjacent plates respectively belonging to the same group is much less than n.times.1/2.lambda. (n=1, 2, . . . ) and where the mutual difference in radiation path distance from the active radiation source to the two adjacent plates respectively belonging to different groups is substantially n.times.1/2.lambda..
2 more elements
Dependencies are inferred from the claim text.