Ramark beacon apparatus

Details Ramark beacon apparatus Ramark beacon apparatus

1982-07-13

1985-04-09

Tubbesing, T. H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 68LC, G01S 722, G01S 1380

Patent

active

045104972

ABSTRACT:
A ramark (radar marker) beacon for aiding navigation on a radar screen has been improved by synchronizing a ramark beacon code with a radar pulse. A beacon code having long dots and short dots stops on a radar screen so that the code may be identified by a radar operator. The present ramark beacon has a code pulse generator for amplitude-modulating a transmitter of a beacon, and said code pulse generator is initialized by each received radar pulse, so that a code pulse is synchronized with a radar pulse. The code pulse generated by said code pulse generator has the same period as the period of the received radar pulse.

REFERENCES:
patent: 2568265 (1951-09-01), Alvarez
patent: 2637021 (1953-04-01), Silverman
patent: 2962707 (1960-11-01), Cleeton
patent: 3179933 (1965-04-01), Hahnel
patent: 3312970 (1967-04-01), Bond
patent: 3964024 (1976-06-01), Hutton et al.
patent: 4129868 (1978-12-01), Tahara et al.

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