Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1966-01-24
1979-11-06
Wilbur, Maynard R.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343 15, G01S 504
Patent
active
041737601
ABSTRACT:
The present invention provides a method and apparatus for effecting, in a ssive manner, the acquisitioning of a broadband barrage jammer type radar target, by detecting the differential delay between the barrage signal as received at a predetermined location over direct and indirect paths and producing a signal distinctly identifying the location of the jammer target relative to the receiving station. More specifically, the present invention includes means for generating reference pulses of varying frequency which are utilized in determining the phase relationship which exists between each of these reference pulses and the corresponding frequency component of the jammer signal as received over the direct path to the target. The jammer signal, as received over the indirect or delayed path, has each of its frequency components corresponding to the frequencies of the generated reference pulses adjusted so that the only phase difference then present between the indirectly received jammer signal components is due to the differential distance existing between the direct and indirect jammer signal paths to the receiving location. These adjusted components of the indirect jammer signal are then combined in such a manner as to produce an output signal which distinctly identifies the location of the jammer target.
REFERENCES:
patent: 2891246 (1959-06-01), Reed, Jr.
patent: 2971190 (1961-02-01), Busignies
patent: 3171126 (1965-02-01), Wiley
Berger Richard E.
The United States of America as represented by the Secretary of
Wilbur Maynard R.
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