| 摘要 |
PROBLEM TO BE SOLVED: To improve the accuracy of detecting the bearing of an incoming radio wave.SOLUTION: When switchers 13a and 13b output a pilot signal prior to the reception of an incoming radio wave, a bearing detection device 1 calculates a difference in path length between a first signal path and a second signal path required for detecting a phase error on the basis of a phase difference detected by a phase difference detector 16 and a time difference in signal transmission between the first signal path and the second signal path that is detected by a path length difference detector 17. A correction unit 19 detects a phase error in a reference bearing at a received frequency on the basis of the received frequency and the path length difference. The correction unit 19 corrects a phase difference detected by the phase difference detector 16 on the basis of the phase error when the switchers 13a and 13b output a received signal. A bearing detection unit 20 detects the bearing of an incoming radio wave from the corrected phase difference.SELECTED DRAWING: Figure 1 |
