Pulse radar apparatus

Details Pulse radar apparatus Pulse radar apparatus

1984-04-23

1987-06-02

Tubbesing, T. H.

Communications: directive radio wave systems and devices (e.g.,

With particular circuit

Complex signal

342132, 342133, G01S 728

Patent

active

046707557

ABSTRACT:
A pulse radar apparatus is provided with a transmitter (1), a transmitting antenna (2) and a receiving antenna system (3) with a first and a second receiving channel (4 and 5) coupled thereto. The receiving antenna system (3) comprises N stacked receiving antennas (A.sub.0, A.sub.1, . . . , A.sub.N-1). The first receiving channel (4) comprises N receiving circuits (B.sub.0, B.sub.1, . . . , B.sub.N-1), each connected to a corresponding receiving antenna (A.sub.0, A.sub.1, . . . , A.sub.N-1) and each processing the particular echo signal into two orthogonally phase-detected and digitized video signal components, and a beamformer (14) to derive from said components the orthogonal components I.sub.k, Q.sub.k of the video signal determined jointly by the N receiving circuits in accordance with a receiving beam pattern k corresponding with a specific elevation interval. The second receiving channel (5) comprises N receivers (B.sub.0, B.sub.1, . . . , B.sub.N-1 ), each connected to a corresponding receiving antenna (A.sub.0, A.sub.1, . . . , A.sub.N-1); a beamformer (17) to derive from the signals of the N receivers (B.sub.0, B.sub.1, . . . , B.sub.N-1) an echo signal determined in accordance with a given receiving beam pattern; and a signal processing circuit (18) for processing said echo signal into two orthogonally phase-detected and digitized video signal components I, Q. The apparatus further comprises a video processor (16) for processing the applied I.sub.k, Q.sub.k and I, Q signals.

REFERENCES:
patent: 4136341 (1979-01-01), Mulder et al.
IEEE Eascon '78 Record; "Digital Multiple Beamforming Techniques for Radar", by A. Ruvin et al; (pp. 152-163; New York, 1978).

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