Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1983-03-21
1986-04-22
Blum, Theodore M.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343 12A, 343458, G01S 302
Patent
active
045845840
ABSTRACT:
A method is disclosed to measure the range and altitude of a radio frequency signal jamming source carried on an airborne platform, signals from such source traveling to a pair of airborne observation points over a direct path and an indirect path, such method including the steps of, before operation, assuming different altitudes for each one of the airborne observation points, calculating and storing sets of numbers representing lines of position characterizing selected values of the difference, dR, between the lengths of the direct and indirect paths, and then, in operation, measuring dR to derive an address indicating the particular one of the stored sets of numbers describing the actual line of position from each observation point to the signal source, triangulating to determine the actual location of the signal source on the actual line of position and displaying the range and altitude of the signal source.
REFERENCES:
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patent: 3181144 (1965-04-01), Morrel et al.
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patent: 4370656 (1983-01-01), Frazier et al.
patent: 4445120 (1984-04-01), Rosenthal
Blum Theodore M.
McFarland Philip J.
Raytheon Company
Sharkansky Richard M.
Sotomayor John B.
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