Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Patent
1991-11-06
1992-11-17
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
342372, H01Q 334, H01Q 336
Patent
active
051647354
ABSTRACT:
To eliminate bulkiness associated with the conventional transmission of control signals to a phase array, and to overcome the precise requirements needed to coherently control a phase array in the prior art, the present invention uses incoherent light to provide optical synchronization of the phase array. For the system of the present invention, incoherent light, in the form of different optical signals having multiplexed thereon a local oscillator signal and a command signal including a plurality of control signals, are summed by a wavelength division multiplexer and sent, over an air path, to each TR module of the phase array. On receipt, each TR array separates from the summed optical signal the oscillator signal and a control signal which is recognizable and to be used only by that TR module. The separated oscillator signal is next fed to a mixer, for modulating a radar signal. The separated control signal provides weighting to the amplitude and phase of the modulated radar signal, relative to the other modulated radar signals from the other TR modules of the array. When all of the modulated radar signals are transmitted from the array, a coherently synchronized radar wave front is provided.
REFERENCES:
patent: 3878520 (1975-04-01), Wright et al.
patent: 4028702 (1977-06-01), Levine
patent: 4258363 (1981-03-01), Bodmer et al.
patent: 4620193 (1986-10-01), Heeks
patent: 4725844 (1988-02-01), Goodwin et al.
patent: 4929956 (1990-05-01), Lee et al.
patent: 4965603 (1990-10-01), Hong et al.
patent: 5008680 (1991-04-01), Willey et al.
patent: 5051754 (1991-09-01), Newberg
patent: 5061937 (1991-10-01), Ozeki et al.
Reich Stanley M.
Vasile Carmine F.
Grumman Aerospace Corporation
Sotomayor John B.
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