Communications: directive radio wave systems and devices (e.g. – Return signal controls external device – Missile or spacecraft guidance
Patent
1977-11-10
1993-10-05
Buczinski, Stephen C.
Communications: directive radio wave systems and devices (e.g.,
Return signal controls external device
Missile or spacecraft guidance
244 319, 342 92, 342149, 342423, 342427, G01S 1300, G01S 502, F41G 700
Patent
active
052509532
ABSTRACT:
A tracking radar system comprising an aerial arrangement having a plurality of outputs, means for deriving from the aerial outputs a sum signal representative of the sum of the aerial outputs and a difference signal representative of the direction of a target relative to the aerial, a receiver for processing said sum and difference signals to produce corresponding intermediate frequency sum and difference signals, means for comparing the intermediate frequency sum signal with the output of an oscillator in a first phase-locked loop and using the resulting signal to control the oscillator frequency so as to cause the oscillator to lock on to the frequency of the intermediate frequency sum signal, a phase-sensitive detector for comparing the intermediate frequency difference signal with the output of the oscillator to produce an output signal representative of the phase difference between the sum and difference signals, and bandwidth alteration means responsive to the sum signal to alter the bandwidth of the first phase-locked loop.
REFERENCES:
patent: 2995750 (1961-08-01), Holcomb et al.
patent: 3206753 (1965-09-01), McCoy
patent: 3378843 (1968-04-01), Sherman
patent: 3713155 (1973-01-01), Jaffe
patent: 3728723 (1973-04-01), Gellekink
patent: 3921175 (1975-11-01), Hughes et al.
patent: 3949955 (1976-04-01), Sykes et al.
Attwood John W.
Floyd John T.
Jones Michael A.
Mitchell Alan J.
Buczinski Stephen C.
The Marconi Company Limited
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