| 摘要 |
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 (A0, A1, . . . , AN-1). The first receiving channel (4) comprises N receiving circuits (B0, B1, . . . , BN-1), each connected to a corresponding receiving antenna (A0, A1, . . . , AN-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 Ik, Qk 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 (B0, B1, . . . , BN-1 ), each connected to a corresponding receiving antenna (A0, A1, . . . , AN-1); a beamformer (17) to derive from the signals of the N receivers (B0, B1, . . . , BN-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 Ik, Qk and I, Q signals. |
