Processing device for angular deviation measurement signals of a

Details Processing device for angular deviation measurement signals of a Processing device for angular deviation measurement signals of a

1980-03-25

1982-05-25

Tubbesing, T. H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 5NQ, G01S 1344

Patent

active

043319580

ABSTRACT:
In order to determine the angular offset of the direction of a target tracked by a monopulse radar from the bore-sight axis of the radar antenna, sum and difference vectors .SIGMA. and .DELTA. represented by intermediate-frequency signals derived from incoming echo pulses are algebraically combined to form two ancillary vectors .gamma.=.SIGMA.+jp.DELTA. and .epsilon.=.SIGMA.+jq.DELTA. where p and q are two mutually different real coefficients, one of which may be zero. For each recurrence of a radar-pulse transmission in a series of N such recurrences, a real component V.sub.iK and an imaginary component V.sub.jK of an angular-deviation vector V is calculated as the scalar and the vector product, respectively, of the two ancillary vectors .gamma. and .epsilon.; these components are separately integrated over the N recurrences to yield two further components W.sub.i and W.sub.j whose quotient W.sub.j /W.sub.i represents a useful angular-deviation signal.

REFERENCES:
patent: 3890617 (1975-06-01), Moulton
patent: 3958242 (1976-05-01), Sirven
patent: 4084160 (1978-04-01), Leuenberger et al.
patent: 4168501 (1979-09-01), Brassaw
patent: 4220953 (1980-09-01), Carre
S. Sherman, Complex Indicated Angles Applied to Unresolved Radar Targets and Multipath; IEEE Transactions on Aerospace & Electronic Systems; vol. AES-7, No. 1, Jan. 1971, pp. 160-170.
P. R. Dax, Accurate Tracking of Low Elevation Targets Over the Sea with a Monopulse Radar, International Conference on Radar-Present and Future, Institution of Electrical Engineers, Oct. 1973, pp. 160-165.

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