Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1975-11-10
1977-09-06
Moskowitz, Nelson
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
346 33EC, G01S 902, G01S 730
Patent
active
040471705
ABSTRACT:
A recording/reproducing system for radar and similar type data is provided wherein all data necessary to record and later reproduce an accurate data (radar) display is formatted on a single recording track; e.g., on magnetic tape, in the form of a single composite signal. In one embodiment, the composite signal contains radar video and trigger markers and is chopped by a multi-bit, bi-phase data signal containing word synchronization sequence, trigger identification, radar coordinate information, and any other pertinent data, as desired. In a second embodiment, the radar video and trigger markers frequency modulate one carrier signal, which is then combined with a second carrier which has been frequency modulated with data (i.e., word synchronization, trigger identification, coordinate information, etc.) to form the composite signal. The reproduce portion of the proposed system then decodes or demodulates the composite signal in order to recover the component signals and convert them back to the proper radar video, triggers and bearing format for display.
REFERENCES:
patent: 3588896 (1969-08-01), Duarte
patent: 3634887 (1969-07-01), Buchholz
patent: 3849776 (1972-10-01), Swynford-Lain
Archibald Robert E.
Moskowitz Nelson
The Johns Hopkins University
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