Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Patent
1991-02-08
1992-01-28
Hellner, Mark
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
343754, H01Q 300
Patent
active
050847074
ABSTRACT:
An antenna system provided with an adjustable reflection coefficient includes at least one radiation source (1), a reflective surface (12) positioned in the path of the radiation generated by the active radiation source (1) and 9 light-generating means (13, 14). The reflective surface (12) is provided with semiconductor surfaces (2.i.j) with a spacer-therebetween and the light of the light-generating means (13, 14) is used to illuminate the semiconductor surfaces (2.i.j) such that, after reflection of the radiation generated by the active radiation source at the reflecting semiconductor surfaces, a radiation beam is obtained in which the beam width and beam orientation can be varied by adjusting the light intensity so as to adjust the phase of the reflection of the semiconductor surfaces.
REFERENCES:
patent: 3979750 (1976-09-01), Smith
patent: 4896033 (1990-01-01), Gautier
patent: 4929956 (1990-05-01), Lee et al.
Hellner Mark
Hollandse Signaalapparaten B.V.
Kraus Robert J.
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