Doppler radio navigation beacon system with means for reducing m

Details Doppler radio navigation beacon system with means for reducing m Doppler radio navigation beacon system with means for reducing m

1974-06-17

1976-04-27

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343108M, G01S 140

Patent

active

039538540

ABSTRACT:
A Doppler Navigation ground beacon antenna commutating arrangement in which the primary scan program radio frequency and reference radio frequency signals are both applied to the antenna elements in mutually opposite commutation directions. The two signals are separated in frequency, as they are in the prior art fixed reference antenna arrangement; accordingly, a fixed reference antenna is no longer required. The novel system greatly reduces the effect of multipath reference signals, especially in situations where there is one or more inopportunely located reflecting object.

REFERENCES:
patent: 3094697 (1963-06-01), Kramar et al.
patent: 3704465 (1972-11-01), Masak et al.

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