Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1976-04-14
1977-10-11
Buczinski, S. C.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343 5DP, 343 13R, G01S 902
Patent
active
040538834
ABSTRACT:
A light weight, low power radar principally adapted for use on small vehicles such as sailboats, which has a fixed antenna providing a continuous forward looking beam which provides range information and limited azimuth information in manual and automatic range scanning modes of operation, and which is capable of automatically tracking targets in range. In the manual mode of operation, a voltage representing a manually selected range is compared with a sweep voltage synchronized with the radar transmitter pulse to generate a pulse having a time relationship to the transmitter pulse corresponding to the selected range. This pulse is utilized to gate a video echo from the radar receiver to logical control circuit which operates in conjunction with the antenna lobing control to actuate a display indicating whether the target is to port or starboard of the vehicle heading. The range voltage is also converted to digital form for display on a digital display device. In the automatic scanning mode, the range scale of the radar is scanned at a slow speed by a sweep voltage representing this range scale. At any ranges at which targets appear, the scan is interrupted for a short period of time during which time the range voltage for this particular portion of the scan is gated through for conversion to digital form and displayed on the digital range display. In the tracking mode, a target to be range tracked is selected from either the manual or scan mode and automatically locked onto by means of a range tracking circuit. During the tracking mode, the range voltage is continually converted to digital form and displayed on the digital range display. The range rate (speed) of the target and the estimated time of arrival (ETA) to the target are computed. Either one can be selected for display on a second digital display.
REFERENCES:
patent: 3035262 (1962-05-01), Vantine, Jr.
patent: 3087151 (1963-04-01), Vantine, Jr.
patent: 3112480 (1963-11-01), Lakatos
patent: 3614286 (1971-10-01), Trinite, Jr.
patent: 3936823 (1976-02-01), Weber
Buczinski S. C.
Safe Flight Instrument Corporation
Sokolski Edward A.
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