Title: Bearing measurement device for a portable attack warning radar

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.

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Inventors: Magorian, William Ray (China Lake, CA, US)

Application Number: 351727
Filing Date: 1973-04-16
Publication_date: 1976-05-11
Assignee: The United States of America as represented by the Secretary of the Navy (Washington, DC)
Primary Class(es): 342/147 342/189, 342/378
Other Classes:
US Patent Ref:

2929056	Mar, 1960	Page	343/16.
2965898	Dec, 1960	Lewis	343/16.
3300768	Jan, 1967	Bystrom et al.	343/5.
3689750	Sep, 1972	Esser	343/100.

Other Refs:
Primary Examiner: Hubler, Malcolm F.
Assistant Examiner:
Attorney: Sciascia; R. S., Miller; Roy