Radio navigational aid with separate standard frequency signal

Details Radio navigational aid with separate standard frequency signal Radio navigational aid with separate standard frequency signal

1974-10-24

1976-04-06

Tubbesing, T. H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343109, G01S 116

Patent

active

RE0287628

ABSTRACT:
Radio guidance signals comprising a carrier having modulation patterns defining a predetermined guidance path plane for a craft to be guided are transmitted, preferably in a scanning beam, from a ground station. A separate standard frequency signal is also transmitted from the ground station which has a predetermined difference in frequency from the guidance signal carrier frequency, the standard frequency being employed to control a local oscillator at the receiver.

REFERENCES:
patent: 1476721 (1923-12-01), Martin
patent: 2113260 (1938-04-01), Usselman
patent: 2602161 (1952-07-01), Proskauer
patent: 3487411 (1969-12-01), Toman
patent: 3735407 (1973-05-01), Meyer

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