CABLE PHASE CALIBRATION IN A TCAS
    2.
    发明公开
    CABLE PHASE CALIBRATION IN A TCAS 有权
    CABLE相位校准IN A TCAS

    公开(公告)号:EP1252531A1

    公开(公告)日:2002-10-30

    申请号:EP00942635.4

    申请日:2000-05-12

    IPC分类号: G01S3/48 G01S3/02 G01S13/93

    摘要: The invention comprises a direction finding receiving system using a plurality of spaced apart antenna elements mounted in cruciform configuration. Each antenna is connected to an individual receiver, the outputs of which are connected to a broadband digital phase detector. The broadband digital phase detector is used to calibrate the transmission channels and builds a table of phase corrections indexed against an operating frequency. On normal operation, the direction finder measures the frequency of the received signal and retrieves the corresponding phase correction from the calibration memory. The phase measurements are then corrected to yield a more accurate angle of arrival.