| 摘要 |
A pulse radar apparatus is provided with a coherent transmitting and receiving unit, including a transmitter (1) and a transmitting antenna (2) for the transmission of radar pulses and the generation of test signals, N juxtaposed receiving antennas (A0, A1, ..., AN) and receivers (B0, B1, ..., BN) connected thereto for the reception of echo signals and the processing thereof in each of the receivers into two orthogonally phase-detected and digitised video signal components, and with a DFT beamformer (4) to derive from said components, after multiplication, in a transformation circuit (C1, C2, ..., CN) by a corresponding weighting factor, the orthogonal components of the video signal determined jointly by the N receivers. The pulse radar apparatus comprises a processor (5) to derive amplitude- and phase-correction signals from the beamformer input signals obtained through the test signals. The amplitude- and phase-correction signals are supplied to the transformation circuits (C1, C2, ..., CN) to compensate for mutual differences in gain and phase shift between the receivers. |
