Method of identifying the patterns of radar signals

Details Method of identifying the patterns of radar signals Method of identifying the patterns of radar signals

1974-05-28

1976-08-31

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

315378, G01S 900

Patent

active

039784800

ABSTRACT:
In a PPI display type radar system wherein a sector shaped unit scanning surface is established in a scanning plane and a unit scanning surface is shifted progressively in the radial and circumferential directions to seach the received pattern for judging a target. The received pattern is identified by dividing the unit scanning surface into a plurality of annular sections derived from a plurality of concentric circles. The scanning unit for scanning surfaces having approximately the same area over the entire scanning surface is designed in such a manner that the ratio (percentage of extraction) of a number of sampled scanning beams to the number of actual scanning beams is a maximum when scanning an annular section which is located most remotely from the center. The percentage of extraction is gradually decreased toward the center so that the percentage of extraction becomes a minimum 1
(where n is an integer) when scanning an annular section closest to the center. Scanning the received signal in each unit scanning surface with a scanning beam at equal numbers in the radial and circumferential directions and at substantially the equal spacing obtains a pattern of the received signal in accordance with the presence or absence thereof, and the target may be judged in accordance with the size of the pattern.

REFERENCES:
patent: 3325806 (1967-06-01), Wilmot et al.
patent: 3353177 (1967-11-01), Wilmot
patent: 3412397 (1968-11-01), Evans
patent: 3684915 (1972-08-01), Gangawere
patent: 3836964 (1974-09-01), Evans

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