Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Patent
1987-05-14
1989-06-06
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
342372, 342408, H01Q 302, H01Q 312
Patent
active
048375802
ABSTRACT:
An MLS system having redundant subsystems. Dual signal sources feed dual power dividers. A first switch array selects the power divider to be used and provides the selected signals to an array of phase shifters. A second switch array provides the phase shifted signal, which may be amplified, to either a primary array having elements for radiating a scanning beam or a recombining network having outputs connected to auxiliary antennas. A third switch array provides control signals to the array of phase shifters from either a main beam steering unit or a standby beam steering unit. Alternatively, the dual signal sources feed a single power divider through a circulator. Duplicate auxiliary antennas may be used with antenna switches located before the power dividers or circulator for selectively providing the signals to the auxiliary antennas instead of the primary array.
REFERENCES:
patent: 3964066 (1976-06-01), Nemit
patent: 4037173 (1977-07-01), Toman
patent: 4123759 (1978-10-01), Hines et al.
patent: 4178581 (1979-12-01), Willey, Sr.
patent: 4186398 (1980-01-01), Minnett et al.
patent: 4301533 (1981-11-01), Acampora et al.
Blum Theodore M.
Hazeltine Corporation
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