System for providing angular deviation data for locating a trans

Details System for providing angular deviation data for locating a trans System for providing angular deviation data for locating a trans

1977-05-06

1979-05-22

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343113R, G01S 348, G01S 902

Patent

active

041562402

ABSTRACT:
Disclosed is a system for locating a transmitter arranged for transmitting frequency-modulated signals. The system supplies data about the angular deviation between the direction of the transmitter considered from a reference point and a reference axis passing through that point and comprises two antennas disposed on the reference axis symmetrically relative to the reference point, and a receiver having two mixers which receive, on the one hand, the respective signals from the two antennas through time delay elements and, on the other hand, the signal from one of the antennas through a circuit which provides, during a given period of time, a linear phase shift. The beat frequencies at the mixer outputs are measured by frequency meters during said time period and the desired information is given by the relative deviation between the output signals of the two frequency meters.

REFERENCES:
patent: 2996711 (1961-08-01), Heiser
patent: 3392390 (1968-07-01), Schelisch
patent: 3815135 (1974-06-01), Martin et al.

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