Multiple frequency navigation radar system

Details Multiple frequency navigation radar system Multiple frequency navigation radar system

1975-11-10

1977-06-21

Tubbesing, T.H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 18D, G01S 956, H01Q 1514

Patent

active

040315355

ABSTRACT:
A navigation system in which a transmitter-antenna combination radiates two independent signals with a known frequency separation there between. These signals are radiated to an antenna on a navigation marker whereby they are received and directed to a non-linear device in which signals at the fundamental frequencies and frequencies that are linear combinations of the two fundamental frequencies are generated. These generated signals are then guided to the antenna and retro-directively re-radiated. The re-radiated signals are received by an antenna at the transmitting location and directed to a receiver wherein the fundamental frequencies and the desired linear combination thereof are detected and processed to provide the locations and identification of the navigation markers.

REFERENCES:
patent: 3798642 (1974-03-01), Augenblick et al
patent: 3896440 (1975-07-01), Wheeler
patent: 3944928 (1976-03-01), Augenblick et al

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