| 摘要 |
<p>PURPOSE:To reduce the directional errors by receiving the incoming radio wave by means of two antennas provided at the specified space, amplifying, realizing the frequency conversion, detecting the time difference between the signals whose time axis is extended, and calculating the radio wave arriving angle on the basis of the time difference. CONSTITUTION:Antennas 1, 2 are arranged at the specified space, front ends 3, 4 realize amplification of the signals received by the antennas 1, 2 and the frequency conversion, the outputted signals are received by received by a time- axis extension circuit 7, and the time-axes are extended respectively, and received by a time difference detecting circuit 5. The circuit 5 detects the signals respectively, the time difference is counted by a clock counter, and transmitted to an angle calculating circuit 6. This arrangement allows detection of the time difference of the respective signals after extending the time axis, enabling reduction of the directional errors relative to the measured error between the antenna spacing and the time difference.</p> |
