Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Patent
1985-12-04
1989-04-25
Buczinski, Stephen C.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
342372, 343754, H01Q 300
Patent
active
048252166
ABSTRACT:
An optical limited scan antenna system is disclosed. The invention is a dual lens type array antenna system with a small array feed network. The system includes a bootlace-type microwave aperture lens with an array of radiating elements arranged along the linear aperture and an array of pickup elements arranged along the curved inner surface, an intermediate optical corrective lens, a feed array for illuminating the corrective lens with a source distribution, and with a power divider and phase shifters arranged to drive the feed array. The corrective lens is circularly symmetric (spherically symmetric in the three-dimensional case), and its radially varying dielectric constant is such that a point source on its surface is focused to an image point on the inner surface. The pickup elements on the curved surface of the aperture lens are coupled to corresponding radiating elements on the linear aperture. The corrective and aperture lens cooperate to map an input or source distribution into an aperture distribution which is a scaled version of the source distribution. The system results in high efficiency obtained with a minimum number of active elements and relatively low cost optical components.
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"Optimum Optical Limited Scan Antenna", Pg. 1133-1142, IEEE Transactions on Antennas and Propagation, Sep. 1986, #9.
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Buczinski Stephen C.
Hughes Aircraft Company
Karambelas A. W.
Runk T. A.
Sotomayor John B.
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