Doppler vor beacons

Details Doppler vor beacons Doppler vor beacons

G - Physics

01

S

343/89

G01S 1/40 (2006.01)

Patent

CA 1039389

IMPROVEMENTS IN DOPPLER VOR BEACONS ABSTRACT OF THE DISCLOSURE A Doppler VOR beacon comprising a central antenna modulated with a reference wave and a ring of omnidirectional antennas radiating sidebands of a sub-carrier amplitude modulation of the carrier commutated around the ring of antennas to simulate a rotating source, in which the central antenna in comparison with the ring antennas has a higher gain towards the horizon and over a predetermined angle above the horizon. The central antenna may comprise a vertically stacked array, the elements of which may be Alford loops.

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