Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1980-04-25
1983-07-12
Tubbesing, T. H.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343 18E, G01S 1100, G01S 348
Patent
active
043933823
ABSTRACT:
Three or more receiving antennas are arrayed in a triangle that in turn is oriented in the same generally defined plane as a scanning RF beam emitted by a distant source of radar or other RF transmission, which is to be located. Signals received by the arrayed antennas are coupled to signal processing circuitry which measures the various time intervals (or differentials) that it takes for the source transmission to sweep through the angles subtended, at the source, by different spaced-apart pairs of the arrayed antennas. From these measured time differentials and the known geometry of the arrayed antennas and a measured scan rate of the transmission source, the signal processing circuitry determines the angle of arrival of the transmission with respect to the array, and then further combines the thusly determined angle of arrival with a signal representing the measured time differential associated with one selected pair of the arrayed antennas, to yield a signal proportional to the distance (range) of the source from the antenna array.
REFERENCES:
patent: 2646564 (1953-07-01), Perilhou
patent: 2668288 (1954-02-01), Perilhou
patent: 2760190 (1956-08-01), Henrici
patent: 3430243 (1969-02-01), Evans
The Boeing Company
Tubbesing T. H.
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