Radiodirection finding method and apparatus using doppler effect

Communications: directive radio wave systems and devices (e.g. – Directive – Beacon or receiver

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342436, 342406, G01S 352, G01S 504, G01S 144

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active

049548352

ABSTRACT:
Radiodirection finding method and apparatus using Doppler effect frequency modulation for measuring the bearing of a source transmitting a high frequency signal, wherein either on the reception side or on the transmission side, several antenna strands are used in pairs diametrically spaced from each other and spaced evenly apart angularly about a circumference. A first pair of diametrically spaced antenna strands are energized and then the next pair of diametrically spaced antenna strands in turn are selectively energized so as to create, at all times, a mobile fictitious antenna moving diametrically and alternately between the two diametrically opposite antenna strands of the particular pair of antenna strands considered. Different pairs of diametrically opposite antenna strands are successively energized in an angularly rotating sequence from the first pair of antenna strands.

REFERENCES:
patent: 4005427 (1977-01-01), Hofgen
patent: 4060809 (1977-11-01), Baghdady
patent: 4143351 (1979-03-01), Orieux
patent: 4151529 (1979-04-01), Dorey
patent: 4591861 (1986-05-01), Kautz

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