Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1959-05-19
1976-02-17
Wilbur, Maynard R.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343112CA, 343112D, G01S 904, G08G 504
Patent
active
039394760
ABSTRACT:
1. A system for passively measuring the range between a given point and a second point from which detectable radiations having distinguishable characteristics are emanating, comprising means for receiving at said given point direct radiations from said second point and indirect radiations from said second point which have been reflected from a reflecting surface, means for measuring the angle of elevation of said second point from said given point, means for measuring the altitude of said given point relative to said reflecting surface, a gate circuit for rejecting all direct signals which are not followed by a reflecting signal within a predetermined time span, and computing means for determining the range from said given point to said second point as a function of said direct and reflected signal, said angle of elevation, and said altitude of said given point.
REFERENCES:
patent: 2568568 (1951-09-01), Stansbury
patent: 2837738 (1958-06-01), Van Valkenburgh
Hair Kirby
Leopard George W.
Beers R.
Berger Richard E.
Schneider P.
Sciascia R. S.
Wilbur Maynard R.
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