Bearing measurement device for a portable attack warning radar

Details Bearing measurement device for a portable attack warning radar Bearing measurement device for a portable attack warning radar

1973-04-16

1976-05-11

Hubler, Malcolm F.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343100CL, G01S 952

Patent

active

039567494

ABSTRACT:
An attack warning system for alerting ground troops or ships to the possiity of attack by enemy aircraft. The system establishes a detection shell at a range of 3 miles covering 360.degree. in azimuth and 60.degree. in elevation. The bearing measurement is obtained by a combination of antenna pattern shape and P-N Code modulation. A pair of oppositely facing receiving antennas and a pair of oppositely facing transmitting antennas located orthogonally with respect to the receiving antennas provide the 360.degree. coverage. The azimuth pattern of each antenna covers 180.degree.. The system provides target bearing information by applying different codes to each of the two opposed transmit antennas and multiply decoding the received signals.

REFERENCES:
patent: 2929056 (1960-03-01), Page
patent: 2965898 (1960-12-01), Lewis
patent: 3300768 (1967-01-01), Bystrom et al.
patent: 3689750 (1972-09-01), Esser

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